H2 Chemistry Practice

SERANGOON JUNIOR COLLEGE General Certificate of Education Advanced Level Higher 2 CHEMISTRY JC2 Preliminary Examination Paper 1 Multiple Choice Additional Materials: Data Booklet Optical Mark Sheet (OMS) 9647/01 23 August 2011 1 hour READ THESE INSTRUCTIONS FIRST On the separate multiple choice OMS given, write your name, FIN/NRIC and class in the spaces provided. Shade correctly your class and FIN/NRIC number. Eg. If your NRIC is S9306660Z, shade S9306660Z for the item â€Å"index number†. There are forty questions in this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice using a soft pencil on the separate OMS. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. You are advised to fill in the OMS as you go along; no additional time will be given for the transfer of answers once the examination has ended. Any rough working should be done in this question paper. This document consists of 20 printed pages and no blank page. 2 Section A For each question there are four possible answers, A, B, C and D. Choose the one you consider to be correct. 1 A student added 10 cm3 of 0. mol dm? 3 KI (aq) to 10 cm3 of 0. 2 mol dm? 3 CuSO4 (aq) in a beaker and observed that a white precipitate in brown solution was obtained. She knew that if she were to add S2O32? (aq) to the mixture, the brown solution will be decolourised. Calculate the volume of 0. 04 mol dm? 3 S2O32? (aq) she should add to the mixture in the beaker in order to completely decolourise the brown solution. A B C D 2 12. 5 cm3 15. 0 cm3 16. 7 cm3 25. 0 cm3 Which of the following contains the greatest amount (in mol) of particles? A B C D 600 g of I2 (s) 50 cm3 of H2O (l) 50 dm3 of HCl (g) at s. t. p. 50 cm3 of 2. 5 mol dm–3 CH3COOH (aq) 3 An element, E can form a simple ion, E2+. Which of the following is the electronic configuration of an atom of E? A B C D 1s2 2s2 2p6 3s2 3p2 1s2 2s2 2p6 3s2 3p4 1s2 2s2 2p6 3s2 3p6 4s1 1s2 2s2 2p6 3s2 3p6 3d5 4s2 SRJC 9647 / 01 / Prelim / 2011 [Turn Over 3 4 In 1996, Professor Hoffman and a group of scientists discovered a new element known as Ununbium, Uub. An atom of Uub can be formed by the fusion of a lead nucleus with the nucleus of an isotope of element G as follows: 208 82Pb + G 277 112Uub + 1 neutron What is G? A B C D Cu Zn Ga Ge 5 Which of the following graphs correctly describes the behaviour of a fixed mass of ideal gas? V/m3 constant P V/m3 constant P T/ oC 0 B V/m 3 T/ oC A V/m 3 constant P constant P 0 C T/ oC 0 D T/ oC SRJC 9647 / 01 / Prelim / 2011 [Turn Over 4 6 Which of the following consists of three compounds with different types of structure? A B C D BeO, SO2, BH3 BeCl2, Na2O, SiO2 AlF3, MgCl2, BN AlCl3, Cu2O, SiCl4 7 Ethyl ethanoate undergoes hydrolysis in water in the presence of dilute hydrochloric acid catalyst. HCl CH3COOCH2CH3 + H2O CH3COOH + CH3CH2OH The rate of reaction was investigated by varying the concentrations of the ester and HCl. Experiment 1 2 3 [ethyl ethanoate] / mol dm-3 0. 10 0. 15 0. 10 [HCl] / mol dm-3 0. 20 0. 10 0. 10 Initial rate / mol dm-3 min-1 0. 096 0. 072 0. 048 Which of the following statements about the above reaction is correct? A B C D Half-life for experiment 1 is 0. 144 min. The rate equation of this reaction is rate = k[CH3COOCH2CH3][ H2O]. Tripling the concentration of both ethyl ethanoate and HCl increases the rate of reaction by a factor of 6 If the half life of ethyl ethanoate in experiment 1 is 5. 0 min, then the half life of ethyl ethanoate in experiment 3 will be 10. min. 8 When 2. 4 g of Na2CO3 was added to 50 cm3 of 1. 0 mol dm-3 aqueous hydrochloric acid, the temperature of the solution rose by 3. 2 oC What is the enthalpy change of neutralisation of this reaction? (Assume that 4. 20 J is required to raise the temperature of 1 cm3 of the solution by 1 K. ) A B C D ? 1. 34 x 104 J mol-1 ? 2. 97 x 104 J mol-1 ? 3. 11 x 104 J mol-1 ? 2. 56 x 106 J mol-1 SRJC 9647 / 01 / Prelim / 2 011 [Turn Over 5 9 The graph below shows how the percentage of products present at equilibrium varies with temperature and pressure. Percentage of products T + 20) oC T oC Pressure Which one of the following reactions could the graph represent? A B C D 2Fe (s) + C (s) + 3 O2 (g) 2 Fe2O3 (s) CO (g) H = ? 822 kJ mol? 1 H = ? 111 kJ mol? 1 H = +57 kJ mol? 1 H = +76 kJ mol? 1 1 O2 (g) 2 N2O4 (g) 2NO2 (g) CO (g) + Cl2 (g) COCl2 (s) 10 Given that the Ksp of Mg(OH)2 is 1. 5 ? 10? 11 mol3 dm? 9 and the Kb of aqueous C2H5NH2 is 5. 6 ? 10? 4 mol dm? 3, what is the solubility of Mg(OH)2 in 1. 0 mol dm? 3 aqueous C2H5NH2? A B C D 1. 64 4. 78 2. 68 6. 34 x 10? 4 mol dm? 3 x 10? 5 mol dm? 3 x 10? 8 mol dm? 3 x 10? 10 mol dm? 3 SRJC 9647 / 01 / Prelim / 2011 Turn Over 6 11 An experiment is set up as shown below: The E cell of the cell was monitored as time progressed. When a change was made continuously to the set-up, the graph below was obtained. E cell /V Time / s What was the continuous change made? A B C D Add nickel (II) chloride to the nickel half cell Add NaCN to the iron half cell Add water to the nickel half-cell Increase the surface area of iron immersed in the solution. SRJC 9647 / 01 / Prelim / 2011 [Turn Over 7 12 Aluminium alloys usually undergo a process known as anodisation to increase corrosion resistance and surface hardness. In this process, oxygen is formed and the gas reacts with the aluminium object to form a thick layer of aluminium oxide on the metal surface that protects the metal. A possible set up for this process is shown as below: Gases liberated Battery H2SO4 (aq) Aluminium object Graphite Which of the following statements about the anodisation of aluminium is true? A B C D Hydrogen gas and sulfur dioxide gas are liberated. Replacing the graphite electrode with copper will cause the reaction to cease. Anodisation is also possible when the aluminium object is connected to the negative terminal Water is oxidised at the anode to produce oxygen gas. SRJC 9647 / 01 / Prelim / 2011 [Turn Over 8 13 Consecutive elements G, H and J are in Period 3 of the Periodic Table. The trend of their second ionisation energies and melting points are shown in the graphs below. 2nd I. E. Melting point G H J G H J What could be the identities of G, H and J? A B C D Na, Mg, Al Mg, Al, Si Si, P, S S, Cl, Ar 14 Which of the follow properties of beryllium and its compounds is incorrect? A B C D Beryllium does not react with water. Beryllium oxide undergoes neutralisation with both acids and bases. Beryllium chloride reacts with ammonia in a 1:2 ratio. Beryllium chloride is insoluble in water SRJC 9647 / 01 / Prelim / 2011 [Turn Over 9 15 When concentrated sulfuric acid was added to solid potassium chloride, white fumes of hydrogen chloride gas was observed. The same observation was made when concentrated sulfuric acid was added to solid potassium iodide, but significantly less white fumes was observed. Which of the following explains the lower yield of hydrogen iodide as compared to hydrogen chloride? A B C D Iodine is less reactive than chlorine. Iodine is a weaker base than chlorine. Hydrogen iodide is less volatile than hydrogen chloride. Hydrogen iodide is more easily oxdised than hydrogen chloride. 16 Which of the graphs below show the variation in the volume of carbon dioxide gas collected when 1 mol of strontium carbonate and 1 mol of calcium carbonate are heated strongly? Volume of gas / cm3 Volume of gas / cm3 Time / min Time / min A Volume of gas 3 / cm Volume of gas 3 / cm B Time / min Time / min C D SRJC 9647 / 01 / Prelim / 2011 [Turn Over 10 17 Astatine is below iodine in Group VII. Which of the following properties is consistent with its position in the Periodic Table? A B C D Silver astatide is soluble in dilute ammonia. Astatine is a liquid at room temperature and pressure. Astatine reacts with aqueous Fe (II) to form Fe (III). Hydrogen astatide decomposes at a lower temperature than hydrogen iodide. 18 Aqueous chlorine is added to aqueous sodium bromide and the mixture was shaken with an equal amount of trichloromethane. Given that the density of trichloromethane is 1. 48 g cm? 3, which one of the following observations can be seen? A Colourless Red-brown B Red-brown C Colourless D Colourless Red-brown 19 Below is a scheme of reaction showing the chemistry of some compounds of transition metals in aqueous solution. Excess AgNO3 (aq) Excess KCl (aq) Cu (s) Blue solution White precipitate What are the possible identities of the blue solution and the white precipitate? Blue solution CuNO3 CuNO3 Cu(NO3)2 Cu(NO3)2 White precipitate CuCl AgCl CuCl AgCl A B C D SRJC 9647 / 01 / Prelim / 2011 [Turn Over 11 20 Stigmasterol is an unsaturated plant sterol occurring in the plant fats of soybean and rape seed. How many stereoisomers does stigmasterol have? A B C D 29 210 211 212 21 In which of the following reactions is the reactive carbon sp3 hybridised in the reactant and sp2 hybridised in the product? Br2 in CCl4, in the dark A CH3CHCHCH3 CH3CHBrCHBrCH3 B CH3COCH3 LiAlH4 in dry ether, r. t. p. (CH3)2CHOH C CH3CH2OH Excess conc. H2SO4, 1700C CH2CH2 Cl Cl D CH3Cl / AlCl3 SRJC 9647 / 01 / Prelim / 2011 [Turn Over 12 22 Which one of the following processes is a propagation step in the chain reaction between CH2Cl2 and Cl2 when irradiated with light? A B C D 2 Cl Cl2 CH2Cl2 + Cl2 CCl3 + Cl2 CHCl3 + Cl CHCl3 + HCl CCl4 + Cl CCl4 + H 23 In the preparation of ethene, ethanol was added to a drop of heated reagent L. The impure ethene was washed by being bubbled through a solution of M before collection. What are the reagents L and M likely to be? Reagent L concentrated H2SO4 concentrated H2SO4 ethanolic NaOH dilute NaOH Reagent M ethanolic NaOH dilute NaOH concentrated H2SO4 concentrated H2SO4 A B C D 24 In the Wurtz reaction, two halogenoalkanes react with sodium metal to form a new carbon-carbon bond, resulting in the formation of a new alkane: R? X + R'? X + 2Na R? R' + 2NaX Which of the following does not show the correct product when the stated reactants are reacted together in a Wurtz reaction? A B CH3Br + C2H5I + 2Na CH3CH2CH3 + NaBr + NaI CH3 Br + + CH3 Br + 2Na + 2NaBr C Br CH 2Br + 2Na 2NaBr D Cl + Br 2Na + NaCl + NaBr SRJC 9647 / 01 / Prelim / 2011 [Turn Over 13 25 Which of the following shows the correct reagents and conditions to produce the desired product? H H C H NaBH4 H COOH (l) Na2CO3 (s) H C H H C H COO Na (l) + A H C H B O O (l) OH PCl 5 (aq) H3 3 CHC C Cl (l) C H3C CH3 C H H C H Cl ethanolic KOH, heat H H C H H C H OC2H5 D H C H 26 Compound Q was refluxed with a queous sodium hydroxide and the resulting mixture was then distilled. The distillate gave a positive tri-iodomethane test. The residue in the distillation flask, after acidification, gave a white precipitate. Which of these could be Q? A B C D CH3CH2COOCH2CH3 C6H5COOCH3 CH3CH2OCOC6H5 CH3CONHC6H5 27 Which of the following produces a compound with a chiral carbon centre on reaction with hydrogen cyanide? A B C D CH3CHO CH3CH2COCH2CH3 CH3CO2CH3 HCHO 9647 / 01 / Prelim / 2011 [Turn Over SRJC 14 28 The Russian composer Borodin, was also a research chemist. He discovered a reaction in which two ethanal molecules combine to form a compound commonly known as an aldol (reaction I). The aldol formed can then produce another compound on heating (reaction II). reaction I reaction II CH3CHO CH3CH(OH)CH2CHO CH3CH(OH)CH2CHO CH3CH=CHCHO + H2O Which of the following best describes reactions I and II? I A B C D II elimination reduction reduction elimination addition addition elimination substitution 29 Compounds W, X and Y react with sodium, but only one of them reacts with aqueous alkaline iodine. Which of the following combinations is likely to be W, X and Y respectively? A B C D C6H5OH, CH3COOH, (CH3)3C OH HOCH2CH2OH, HOCH(CHI2)CH2COOH, CH3COCH2I CH3COOH, (CH3)3COH, CH3COCH2OH CH3COOH, CH3COCHI2, CH3COOCH2OH SRJC 9647 / 01 / Prelim / 2011 [Turn Over 15 0 In the study of a polypeptide structure of Z, it was digested using two different enzymes. The fragments obtained were then separated using electrophoresis. Analysis of the fragments from each digestion gave the following results: Fragments using first enzyme: tyr-leu-leu tyr-ala gly-asp-pro asp-pro Fragments using second enzyme: leu-tyr asp-pro-gly ala asp-pro-tyr-leu Deduce the possible sequence of Z. A B C D asp-pro-tyr-leu-ala-leu-tyr-asp-pro-gly asp-pro-gly-asp-pro-tyr-leu-leu-tyr-ala gly-asp-pro-asp-pro-tyr-ala-tyr-leu-leu ala-asp-pro-gly-asp-pro-tyr-leu-leu-tyr SRJC 9647 / 01 / Prelim / 2011 [Turn Over 16 Section B For questions 31-40, one or more of the numbered statements 1 to 3 may be correct. Decide whether each of the statements is or is not correct. The responses A to D should be selected on the basis of A 1, 2 and 3 B 1 and 2 only C 2 and 3 only D 1 only are correct are correct are correct is correct No other combination of statements is to be used as a correct response. 31 Two colourless liquids were mixed together in a beaker and left to stand. The mixture separated into two distinct layers after standing for an hour. Assuming that the liquids did not undergo any reaction with each other, which pair(s) of liquids, when mixed, will produce the above observation? 1 2 3 Ethanal and water Cyclohexanol and methanol Ethanol and tetrachloromethane 32 A reversible reaction, A (aq) + B (aq) of M2+ ions. C (aq) is catalysed by an aqueous solution Which of the following statement(s) about this system is/are correct? 1 2 3 The catalyst alters the mechanism of the reaction. The catalyst reduces the activation energy for both the forward and backward reaction. The catalyst alters the composition of the equilibrium mixture. SRJC 9647 / 01 / Prelim / 2011 [Turn Over 17 33 Sulfuryl chloride, SO2Cl2, is often used as a source of Cl2 for various organic reactions. Sulfuryl chloride is also a highly reactive gaseous compound which decomposes endothermically when heated in the following manner: SO2Cl2 (g) SO2 (g) + Cl2 (g) A 7:2 mole ratio of SO2Cl2 and Cl2 was placed in an evacuated vessel at 375 K and 6 atm. After 10 minutes, the mixture reached equilibrium and the partial pressure of SO2 was found to be 0. 625 atm. Based on the above data, which of the following statement(s) is/are correct? 1 2 3 The Kp value is 0. 03 atm. The Kp value will decrease when total pressure increases. The partial pressure of SO2Cl2 will remain constant when temperature decreases. 34 Consider the reaction between sulfur dioxide and oxygen to form sulfur trioxide: 2SO2 + O2 2SO3 Given that ? H = ? 199 kJ mol-1, and ? S = ? 190 J K-1 mol-1 for the above reaction, which of the following statement(s) is/are correct for the reaction? 1 2 3 The reaction is spontaneous under standard conditions. As temperature increases, the reaction becomes more spontaneous. In the formation of sulfur trioxide, the system becomes more disordered. 5 Hydrazoic acid, HN3, is an acid with pKa value of 4. 72. Which of the following statement(s) about a 25. 0 cm3 sample of 0. 100 mol dm? 3 HN3 (aq) is/are correct? 1 2 3 The concentration of N3? in the sample is 1. 38 x 10? 3 mol dm? 3. A buffer solution is formed when 12. 50 cm3 of 0. 100 mol dm? 3 of NH3 (aq) is added to the sample. When titrated with NaOH (aq), the equivalence pH is above 7. SRJC 9647 / 01 / Prelim / 2011 [Turn Over 18 36 In 1800, an Italian physicist Alessandro Volta invented the first battery – the voltaic pile. A diagram of the voltaic pile is shown below: Blotting paper soaked in Zinc metal H2SO4 (aq) Copper metal One cell Which of the following statement(s) is/are correct? 1 2 3 The overall equation of the reaction occurring in the cell is Cu2+ + Zn Zn2+ + Cu. Zinc is the anode, while copper is the cathode. cathode The e. m. f. of the voltaic pile can be increased by stacking more elements 37 When drops of NaOH (aq) were added to a green solution of Cr(NO3)3 (aq), a greygreen precipitate was formed. The precipitate dissolved when excess NaOH(aq) was added, forming a dark green solution. Subsequent additions of liquid ammonia caused the solution to turn violet. According to the information given above, which of the following statement(s) is/are incorrect? 1 2 3 OH? acted as a ligand in the first addition of drops of NaOH (aq). NH3 is a stronger field ligand as compared to OH?. The [Cr(H2O)6]3+ complex is the most unstable of all the complexes involved. SRJC 9647 / 01 / Prelim / 2011 [Turn Over 19 38 Chloroethane reacts with excess alcoholic ammonia when heated to form a quaternary ammonium salt in four steps. Which of the following statement(s) about the reaction is/are correct? 1 2 3 In each step, the attacking nucleophile is more nucleophilic than that in the previous step. In each step, the reaction is slower than the previous step due to increased steric hindrance. In each step, an intermediate with a sp2 hybridised carbon atom is formed. 39 Dopamine is a neurotransmitter found in many animals, including vertebrates and invertebrates. The structure of dopamine is shown below: O OH HO OH NH2 Which of the following statement(s) is/are correct? 1 2 3 1 mol of dopamine reacts with 3 mol of ethanoyl chloride. 1 mol of dopamine reacts with 1 mol of HBr (aq). 1 mol of dopamine reacts with 1 mol of Na2CO3. SRJC 9647 / 01 / Prelim / 2011 [Turn Over 20 40 Paracetamol is commonly used for the relief of headaches, fever and pains. It is a major ingredient for cold and flu remedies. The structure of Parcetamol is shown below: H N O CH3 HO Which of the following statement(s) about Paracetamol is/are correct? 1 2 3 On addition of concentrated nitric acid, a white precipitate will be formed. A pale yellow precipitate is formed when a solution of warm alkaline aqueous iodine solution is added. It reacts with hot aqueous sodium hydroxide to produce a gas which turns damp red litmus paper blue SRJC 9647 / 01 / Prelim / 2011 [Turn Over

Desalination Solution To The Freshwater Crisis Environmental Sciences Essay

The chief ground for drinkable H2O deficit in Singapore is the fact that it is surrounded by sea H2O, unsuitable for imbibing. At present, the state has created sustainable H2O supply from its ‘Four National Taps ‘ , which consists of rainwater reservoirs, imported H2O, reclaimed H2O ( NEWater ) and desalinated H2O. ( â€Å" Water Supply † ) The detonating population is besides increasing the strength of drinkable H2O demand, doing deficits.Problems Associated with Drinkable Water ShortagesThe chief cause of hungriness, disease and poorness is the deficiency of clean, safe imbibing H2O. ( â€Å" Why Water? † ) Crops would be unable to turn doing hungriness. Consumption of contaminated H2O is the chief cause of diseases. Regions missing in safe, imbibing H2O have a higher rate of decease and diseases. Peoples are ill more frequently, and are unable to work. This prevents the part from promotion. Regional struggles over scarce H2O resources may ensue in warfar e. ( â€Å" Water Scarcity † ) Figure 2 shows the H2O deficit around the universe. hypertext transfer protocol: //www.hydrogenambassadors.com/background/images/background/water-shortage.gif Figure 2 – Water Deficit ( Hydrogen Ambassador )Desalination – How does it turn to drinkable H2O deficits?The bulk of H2O on the Earth is seawater and Singapore is surrounded by it excessively. If this H2O was converted into safe, drinking H2O, the job of drinkable H2O deficits would be easy solved. This is where desalinization plays its function. The procedure of taking salt from saltwater to make fresh water is called desalinization. ( Aintablian, † Water Desalination † ) A turning figure of desalinization workss are being built around the universe to turn to the job of fresh water deficits. The two chief methods of desalinization are distillment and the membrane procedure. In the procedure of distillment, a scope of method are used to vaporize saltwater, them condense the vapour, to obtain non-saline H2O. The membrane procedure has two types, viz. rearward osmosis and forward osmosis. Rearward osmosis is the procedure where pre-treated saltwater is pumped through a partly permeable membrane at high force per unit area, which separates dissolved splines from the H2O. Forward osmosis involves the natural procedure of osmosis ; H2O traveling from a extremely concentrated part to a part of low concentration. This procedure allows it to of course happen, alternatively of coercing it through a force per unit area gradient. In this procedure, the saltwater passes through a partly permeable membrane to a concentrated solution of ammonium hydroxide salts, go forthing salt atoms behind. The ammonium hydroxide salts are evaporated and can be reused. ( â€Å" Tuas Seawater Desalination Plant † ) The procedure is shown in Figure 3. hypertext transfer protocol: //www.nrdc.org/onearth/04sum/images/saline_diagram.jpg Figure 3 – Seawater Distillation Process ( Glowac )Positive Impacts of DesalinationSupplying fresh water to countries with limited resources is the chief intent of desalinization. Communities get provided with a safe and dependable supply of fresh water. Singapore itself has no direct beginnings of fresh water except rainwater. The state has to import around 2500 gallons of H2O from Malaysia every twelvemonth. To drop the rate of import, it makes usage of the saltwater it is surrounded by. Desalination helps increase the sum of safe drinkable H2O available and saves lessenings import of H2O from states with big sums of fresh water available. This is helps diminish the general cost, since H2O conveyance is an expensive matter. It provides a dependable and readily available beginning of H2O in instances of terrible drouth. It becomes a necessity in the present clime in increasing temperatures, spread outing population and unsustainable groundwater. ( â€Å" The Advantages of De salination † )Negative Impacts of DesalinationEven though desalinization is a utile procedure, it has its general reverses. Disposing of the waste salt solution will increase the concentration of salt in the H2O. This will do the procedure harder and may harm the animals under the sea. The desalinization procedure is an expensive one and requires a batch of energy. Since most energy is derived from fossil fuels, it is said to be a affair of taking one environmental issue over the other. The costs are even higher if parts off from the seashore or at high heights, seek utilizing desalinated H2O. Many resources would be required to transport H2O from the ocean or a organic structure of salty H2O to far distances and high heights. ( Aintablian. â€Å" Water Desalination † )Factors affected by DesalinationEconomic Factor For – Desalination helps states with limited beginnings of fresh water to hold entree to drinkable H2O, without holding to bear conveyance costs. Wealth can be created by desalinization, as it increases the opportunities for development of agribusiness, industry and touristry in states with a scarce H2O supply. These alterations are bound to raise the overall income of a part. Some direct occupations and income can be expected from desalinization workss. Seawater desalinization is a feasible option is coastal parts which find desalinization more cost-efficient so transporting H2O from other parts. ( What is Desalination? – Benefits ) Against – Desalination is an expensive procedure. It becomes more expensive when the salt H2O needs to be transported to regions off from the seashore or those at high heights. Economically stable states like Singapore can afford to construct desalinization workss and change over big measures of saltwater, but other 3rd universe states confronting the fresh water crisis may fight to pay for desalinization workss to be opened and for big measures of H2O to be transported and converted. The ground the costs for desalinization are so high is because heavy-duty machinery and equipment is required to change over salt H2O into fresh water expeditiously. Not all states have the budget or land to construct mills with such expensive equipment. So, even though the desalinization procedure is a great solution to the fresh water crisis, we have yet to get the better of the costs required to run it. Figure 4 shows how engineering is progressing to do the procedure of desalinization less de arly-won. hypertext transfer protocol: //kanat.jsc.vsc.edu/student/glowact/body.h1.jpg Figure 4 – Decline in Seawater Desalination Costs Represents Evolution in Technology ( Hayes ) Environmental Factor For – More than 97 % of the H2O in the universe is seawater, which means there is small H2O for the universe ‘s turning H2O demand. The underdeveloped universe can non trust on a individual beginning of H2O anymore, and holding a dependable solution to the fresh water crisis helps alleviate emphasis on the fresh water available ( What is Desalination? – Benefits. ) The H2O conveyance systems use a great trade of energy and do air pollution. Desalination workss placed strategically helps decrease the environmental impact. Water made available during drouths would protect against H2O deficits. More fresh water would be available for usage in agribusiness. ( Dorward. â€Å" The Benefits of Desalination Plants ) Against – The procedure of desalinization requires a batch of energy. Since most power beginnings are soon derived from fossil fuels, desalinization has a manus in planetary heating. The constructing procedure would be time-consuming. Therefore, it would upset the environment. The waste salt solution is released back into the sea. This increases the concentration of salt in the saltwater and this may harm the animals under the ocean. Since more salt demands to be removed, more energy has to be used and it leads to a higher wastage of fossil fuels. Figure 5 shows the minerals being discharged into the sea and this is what makes the procedure harder and it requires more energy. This discharge may besides incorporate low concentrations of chemicals used in the procedure, which could harm environment-sensitive countries ( Younos, Tamim 11. ) Even though desalinization is the best solution to the universe ‘s fresh water crisis, it has environmental issues have to be solved be fore it can be used around the universe on a big graduated table. hypertext transfer protocol: //t1.gstatic.com/images? q=tbn: ANd9GcSHEXi_HxYsF0cbcqyC6gRNp2i18V0j4QXFTCcwIXO0RrVCFL1bCA Figure 5 – Minerals are discharged into the sea, and the desalinization procedure requires more energy ( MEWR | Desalination ) Word Count – 1, 256

House on Mango Street Questions Essay

1. The apparent randomness shows the diversity of Mango Street. The random topics emulate the random cast of characters that live on the street and the different lives they lead. 2. The fact that Esperanza has problems with eating in public shows that she is very insecure and self-conscious of her body. She doesn’t want others to see her eat. This may be because she believes she is too skinny or too fat. 3. In many ways, it is a feminist text. Since the main character is female and much of the story is seen through her point of view, she addressed many female issues. These include the constant abuse many females faced from the men in charge of their lives. However, many of these issues are universal. Both sons and daughters have been victims to parental abuse and everyone dreams of escaping to paradise. 4. When Esperanza mentions her own war, she is referring to her inner struggle between becoming a grown woman who will patiently wait for a man or becoming a woman who is in ch arge of herself. 5. Boys are held to a higher standard than women are. They are bred to become proud, authoritative figures in society while the females are nurtured into becoming submissive partners. Since boys are considered superior, it is considered a weakness when they befriend and play with girls. These beliefs will cause the boys to grow up as dominative, controlling husbands that rule over their own lives and their wives’ lives. The women will end up being common submissive partners. The future relationship is one similar to one between masters and slaves. 6. Esperanza looks up to many women in the book. She looks up to Marin because she exudes knowledge of the world and shows off the sexuality that Esperanza is just discovering. She also looks up to Alicia because she isn’t only wishing to escape, but is actually working towards it by going to university. Esperanza looks up to Lois because she represents the freedom that Esperanza desperately craves. Esperanza wants to stay out until late and feel the love that she sees Lois experiencing. Finally, Esperanza looks up to Sally because Sally is there to comfort her and because she envies Sally’s beauty. She feels connected to Sally because they both dream of escaping. 7. The House on Mango Street is a book about culture because the problem that Esperanza faced is caused by the clash in culture. She longs for freedom because she is trapped in a slum due to her race. Cathy referred to this racism when she said that she was moving because people like Esperanza were moving in. Cisnero also uses various Spanish words throughout the book. 8. Esperanza has contrasting feelings towards her Hispanic heritage. On one hand, she feels that it confined by it because Spanish culture trains their women to be submissive. On the other hand, she feels that her name can only sound beautiful through a Spanish tongue. Esperanza feels that the Spanish heritage can show off her inner beauty. She also feels disconnected from the English culture that she has been thrust into. She is looked down upon and is tossed aside by the outside society. She longs to change that when she gets older. She wants to get out of Mango street but plans to come back to help those who could n ot get out. 9. Esperanza’s love of speech is shown when she describes her name. She says that her name is like a muddy colored number nine. All the characters live on Mango street and have their own troubles, but many of them share similar issues. Sally is beaten by her dad while Minerva is beaten by her husband. Earl keeps his wife behind locked doors just like Rafaela’s husband keeps her in the house at all times. 10. In â€Å"Beautiful and Cruel,† Esperanza thinks she’s seen as the ugly daughter. However, she sees herself as a strong woman who won’t allow any man to control her. Esperanza believes she has inner power that nobody else can see other than her. 11. Rafaela dreams of escaping the house she is confined to, and is able to escape for a moment on Tuesday when she gets various fruits from the nearby market. Minerva tried to escape her abusive husband by kicking him out, but she always lets him back in. Sally wishes to escape the abusive home she lives in but is unable to do so. Cathy’s family wanted to escape the many Chicanos moving into the neighborhood, and they achieved that to an extent when they moved farther down the street. Esperanza wants to leave too. She will have to work just as hard as everyone else, or even harder, to escape but she will. It’s hard to escape when one is poor. The less money they have the lesser opportunities become available. Poverty lessens the chances of escaping, but increases the drive to want to do so. 12. Esperanza dreams of a white house with trees, a big backyard, real stairs, three bathrooms, and a basement. Her actual house is small and red with a small backyard, tiny windows, a swollen door, one bathroom, and only one bedroom. Esperanza dreams big and craves success. She has a lot of ambition to leave but has just as much ambition to come back. She wants to give back to the community as well as escape it.

Critique The Mommy Tax by Ann Crittenden Essay Example | Topics and Well Written Essays - 500 words

Critique The Mommy Tax by Ann Crittenden - Essay Example Notably, Crittenden’s perspectives in regards to this statement extend beyond these earlier considerations as she additionally argues that this income disparity is linked to the women’s role as potential mother. She argues that one of the central desires of the workplace is have workers that are entirely unencumbered so that they can be entirely devoted to their employment. Women then present a challenge to this paradigm as if they have or may children they could be hindered in their job duties. For Crittenden then this constitutes a ‘mommy tax’. She believes that social activists should address this added tax in pro-active ways. Crittenden further criticizes this income disparity from a variety of perspectives. She articulates her own experience having children and having lost out of a significant amount of income. Additionally she notes that individuals in the highest paying jobs face the great challenges as they have the most skill and responsibility considerations. She notes that such distinctions between men and women have existed at least as early as the Bible. In current practice they take on a significant amount of importance as women who are childless make more than women who have children. There are a number of further contributing elements that researchers have identified. One considers that oftentimes workplaces refrain from paying maternity leave. Oftentimes mother’s work part time and are believed to have a recreational attitude towards work. Ultimately, Crittenden argues that the government should extend financial benefits towards mother, as well develop a more comprehensive take on anti-discriminatory practices. While Crittenden’s recognition that there is a tax on mothers in the work place is valid, it seems that such a tax is an in-born part of the financial system. In these regards, mothers truly do contribute less than individuals that are less encumbered by

Reading and Comprehension of texts Essay Example | Topics and Well Written Essays - 1250 words

Reading and Comprehension of texts - Essay Example The title of the poem is â€Å"Death of a Naturalist†. Through analysis of the title, an individual can understand the themes of the poem. Moreover, the classroom setting of the poem indicates safety and danger as the teacher uses expressions such as â€Å"daddy frog† to give various examples of safety and danger. Besides, ideas of safety nightmarish images and ideas of safety and danger such as the use of words like the "punishing sun" and "Flax had rotted there." The purpose of the text is to show the dangers involved throughout a Childs life incorporating challenges of nature by using a frog. Additionally, nature is represented as an educational force in a Childs life. The safety and danger of situations among children develops in the poem since in the last stanza, and Heaney says that good times represent by the presentation of the weather. Frogs are yellow in the sun to represent danger while they are brown in the rain to represent safety. The reading of texts such as poems generates knowledge without involving teachers. The main points in the text reflect the challenges of safety and danger experienced by children. Some of the points that indicate safety in the poem includes flax-dam fostered in the heart. It appears in the first stanza and reveals various aspects of safety that a child should have. Besides, the sixth line of the poem, reads, â€Å"Wove strong gauze of sound around the smell,† .It represents dangers within the environment that a child need to notice and take necessary steps to escape from danger. The title of the novel is â€Å"The One Thing Needful†. The novel reflects hard times by booking the first sowing. Moreover, the author insists on the importance of facts among boys and girls. Additionally, it points out the importance of facts, as the only thing wanted in life since it’s a part that forms enhances rational thought. Sticking to facts should be the core principle parents bring up their children. The

Minority Shareholders Proprietary Rights Essay Example | Topics and Well Written Essays - 2000 words

Minority Shareholders Proprietary Rights - Essay Example As in the case of Gambotto in Australia, in a number of cases, the courts have taken cognizance to the fact that even if the plaintiff does not request for the two tests, the courts may and can subject the amendment to these tests and see to their fitment to the same. Failing which in either of the cases, the amendments may be nullified. The proprietary rights of the shareholders have to be upheld but not at the cost of the company according to the British Law, in contrast to the Australian perception of the matter. Exercising of the majority powers by the shareholders of a company is pretty rampant in the country. It is with utmost care and interest that the courts need to implement these laws so that the suppression of the shareholding minorities is protected and at the same time, the objectives of the company are not diluted. However, the point raised in the indicated quote is to ensure that the interest of both the minorities and that of the company should also be protected. In the name of protecting the interest of the minorities, the company should not be ending up as a loser in the game thereby, bringing down the interests of the rest of the shareholders of the company. In order to understand this, the idea of proprietary rights being protected has to be analyzed. Proprietary rights in most cases have been the ownership rights or the right to own. In cases related to owning land or building there had not been contentions on the proprietary rights of a person and what is offered to one person is same as the other one3. Whereas in the case of shareholder proprietary rights, the minority shareholders rights might be different from what the majority shareholder might have. The association of the company could be for one simple reason that of the company making more profits or as high a profit as is legitimately possible.

What do you think will be issues that will influence the key sill Essay

What do you think will be issues that will influence the key sill requirements for next 5 to 10 years - Essay Example These specifically include the issues that can affect the operations of the company. In relation to the above statement, the thrust of this paper is to discuss the issues that can affect the company and can further influence the key skill requirements of the firm in the next 5 to 10 years. For a huge corporation like Sinopec, it is a basic requirement for the firm to have highly competent managers who are experts and knowledgeable in the field of energy and chemical industry. It is also important to the managerial department of the firm to know how to deal with different types of employees. The role of the managers is very important in keeping the daily operations of the company in order. It is also a great challenge for Sinopec to enhance the understanding and practices of their managers on the importance of responsible leadership. The specifically include the enhancement of the competencies of the managers to integrate social and environmental considerations in creating business decisions (Wilson & Hind, 2006). A business organisation can hardly perform its daily operations without the presence of its workforce. Skillful and hardworking workforce is one of the significant factors towards achieving the goals and objectives of business organisations. Their role in the company is very important in achieving the company’s economic triumph. Hence, it is very much important to put into great consideration the satisfaction of the workers, their health, and wellness, and their safety at work considering the kind of industry Sinopec has. The safety of the employees especially those in their plants are of high risks due to the possibility that anytime the plant might explode due to some technical problems or leakage of petroleum same as what happened to Sinopec’s oil terminal in Qingdao China (Moody’s: Sinopec Corp’s , 2013). As above mentioned, the safety of the employees of Sinopec is of high risk due to the kind of industry the firm has.

Strategic Management Case Study Example | Topics and Well Written Essays - 4500 words

Strategic Management - Case Study Example Inaugurated in 1999, the company’s 16 years of existence has proved remarkably beneficial in the global energy mix, crafting ultra-modern ideas that have contributed to resolving present day energy needs such as supply reliability, fuel cost volatility and overall conserving the earths scarce natural resources and fossil fuels with its exclusive cadmium telluride (CdTe) film technology, successfully achieving the undermost leveled cost of electricity (LCOE) in the entire industry. They also extraordinarily lowered manufacturing costs to the bare minimum i.e. less than a dollar per watt, another record breaker, and a new goal limit set for capital efficiency. (Citation, year) This success, although seen to only further excel, faced new rivalries in 2011, hence leading to the gradual decline of their electric empire in the solar module industry. Specializing in the production of crystal silicon (c-Si), these emergent companies such as Trina, Yingli and Suntech raced to not only reach but overcome these newly set standards, rapidly reducing overall manufacturing costs and increasing output. In 2013, Suntech replaced First Solar acclaiming the number one position of modules worldwide. Several strategic issues had surfaced due to which First Solar led to its downfall. Of the two major reasons, the first is that these new entrants began selling crystalline-silicon solar panels for less than a dollar, creating a price clash. Secondly, the silicon solar panels proved more efficient than the thin-filmed cadmium-telluride solar panels hence consumers preferred the newer products over theirs as they were getting better quality and reliability for the same price. Although a major part of their profits were accumulated from their solar power plants and installation, these low budgeted and better quality Chinese panels forced

Film editing process Research Paper Example | Topics and Well Written Essays - 3250 words

Film editing process - Research Paper Example Video clips can be improved significantly by simply discarding unwanted or flawed bits. Another editing goal involves choosing the best footage. It is common for filmmakers to shoot far more footages than actually needed and then choose only the best material for the final cut. Often, several takes of a shot are filmed and the best one is chosen during editing.The other goal is to create a flow, since most videos are meant for a certain purpose, such as providing information or explaining a story. Thus, editing is a vital step in ensuring the video flows in a manner that achieves this goal. The part of editing that is considered most interesting is the addition of effects, music, graphics, etc. It involves improving the videos by adding extra elements. Another goal is the altering of the pace, style, or mood of the video, with a good editor having the ability to create in a video mood prompts that are subtle. Techniques such as visual effects and mood music can have a great influence on the reaction of the audience. The editor can also give the video a certain angle, which is tailoring the video in a way that it supports a certain viewpoint, serves an agenda, or imparts a message.Perhaps in order to understand film editing, it is important to look briefly into its history. Edwin S. Porter is considered the father of modern film editing. In 1903, he displayed his unprecedented ability to make a film and narrate a story from multiple shots, as opposed to just one whereby the entire story takes place in front of one stationary camera. Porter was the first to apply editing as a means of progressing the story of the film. He also defined numerous film transitions that play a major role in the theory of film editing. He was also the first to transform a found footage into a story he wished to narrate, with the story being unrelated to what the footage was initially intended to portray. This means he actually saw film editing as a form of art capable of narrating stor ies independently (Weynand 2005). Aims and objectives This essay undertakes a collaborative research in order to develop a framework for analyzing the film editing process together with all the related approaches, theories, and techniques. The essay will address the following aims and objectives: To provide a technical investigation covering the theory of film

Casestudy on Nike's Social Media Strategy Case Study

Casestudy on Nike's Social Media Strategy - Case Study Example They are now eyes and ears of a locality through which it is connected to the whole world. In business, use of these communication means and electronic devices like computers, smartphones, netbooks and digital billboards forms the basis of digital marketing. Its impact and benefits are far reaching because of cost affectivity, greater audience and ease of marketing. According to Morgan Stanley Research, a total of 37% marketing traffic has been shifted to online media and mobile communication (Stanley, 2012). This trend was not foreseeable during early part of networks communication development. But, it is now clear that digital marketing will be the marketing arena for the future. In online communication, websites and web-portals provide large number of audience. In journalistic terms it can be said that digital marketing is a mode for mass media campaigns. Still there is another aspect of online and live communication. It is the development of social media within internet communication. It has not only bonded people but has also bridged the digital divide that existed till the end of 20th century. Digital marketing is now the main stream communication that happens alongside other types of communication between individuals and groups. Along the way it is also a source to advertise any new invention or innovation. Presently many organizations have improved their business and have increased number of customers at various locations of the earth by the help of social media. For social websites, people not only socialize with each other, but also interact with marketed commodities. In this case study, assessment of Nike’s social media strategy is carried out. Two important digital marketing means namely The Power of Like and social media Marketing Strategy of Nightclubs is taken in the case of Nike. Before getting into the details digital marketing strategies and their sphere of action should be noted. Digital Marketing is carried out

Doing Business in a Foreign Country Essay Example | Topics and Well Written Essays - 1000 words

Doing Business in a Foreign Country - Essay Example The understanding of the things that can determine the performance of a business operation in Brazil will ensure that foreign investors will be able to establish sustainable businesses in the country. Though doing business in Brazil cannot be easy and has several issues, it is achievable for a foreign organization that is committed to explore the opportunities in the country. The business environment of Brazil requires that the investor be willing and dedicated to the performance of business by supplying sufficient resources and personnel (Ibp Inc 56). Political environment of Brazil Brazil has a business environment that is regulated by the political atmosphere of people in the country considering the federal government has a lot of input into the operation of the business. The government strategies in the country have contributed to the kind of operations into which investors can venture so that they exploit the economic opportunities in the country. Through the government system, the parliament of the country decided on the amount of interest that businesses and individuals could be charged when they acquire loans from the banks. This regulation of the interests on loans shows that there is political influence in business operations in the country (Ibp Inc 55). Legal Environment Foreigners who have to invest in Brazil take a considerable long time to comply with the bureaucratic systems that are established to allow them to operate in the country. This time is taken in filing of issues that show compliance to the legally acceptable charges like taxation, labor laws, reporting and getting permits for their businesses. These processes are legally stipulated and, therefore, every foreign investor has to conform to the requirement to be allowed to start a business (Ibp Inc 55-57). Economic Environment Brazil is a capitalist state that operates in the southern America and has firmly established itself in export of high quality products that attract customers. Thi s means that businesses in the area have to compete for their customers and ensure that they make sales to them so that they can sustain their operation. In many instances, the operations in the business in this country involve export of coffee and other agricultural products, as well as impost of machinery and other products from its business partners that may include the US, China and South Korea among others (Ibp Inc 56). Monetary Environment The federal government of Brazil has Real as its currency since 1994 and, therefore, business operations in the country are done using this currency, especially when it targets the local population. The currency has performed well at the steady exchange rates with other popular currencies within the business environment. This means that the operations of the business in the country are not threatened if the exchange rates in the currency shift within considerable limits. The currency is used to trade with the people within the country or tho se who want to buy products from the country from other countries (Marr 76). Fiscal Constraints in doing Business in Brazil In Brazil, the rates of interests in the central bank of the country are high as compared to other countries in the world and, therefore, it can affect adversely the foreign investors who want to

Accounting and Finance For Business Essay Example for Free

Accounting and Finance For Business Essay While these tutorial tasks MUST be submitted individually, you are encourage to work through these tasks together with the other members of your team, both during this week’s tutorial and in your own time. This is a good opportunity to ensure that all members of your group can calculate a breakeven point before and after-tax, a margin of safety and make a managerial decision regarding the addition of a new product (in this tutorial exercise, the addition of a new route). All answers must be inserted into the on-line form provided in LMS titled, Topic 9 Tutorial Exercises. Kangaroo Airlines Kangaroo Airlines in small local carrier located in the Kimberly region of Western Australia. All seats are economy class and the following data is available: 1.What is the break-even point in number of passengers per month? 30000 2.What is the break-even point in sales revenue dollars per month? 2100000 3.What is the break-even point in number of flights per month (round up)? 334 4.If Kangaroo Airline currently has on average 40,000 passengers per month what is Kangaroo Airline’s margin of safety in number of passengers? 5.If Kangaroo Airlines raises its average full passenger fare to $85 and the  average variable costs per passenger will remain at $30, it is estimated that the load factor will decrease to 60 percent. What will be the break-even point in number of flights (round up)? 6.The cost of aviation fuel is a significant variable cost to any airline. If fuel charges increase by $8 per barrel, it is estimated that variable cost per passenger will increase to $40 however that average full passenger fare will remain at the original $70 per passenger as will the original load factor of 75 percent. What will be the new break-even point in number of passengers? 7.The cost of aviation fuel is a significant variable cost to any airline. If fuel charges increase by $8 per barrel, it is estimated that variable cost per passenger will increase to $40 however the average full passenger fare will remain at the original $70 per passenger as will the original load factor of 75%. What will be the new break-even point in number of passengers? What will be the new break-even point in number of flights (round up)? 8.Kangaroo Airlines has experienced an increase in average variable cost per passenger to $35 and an increase in fixed costs to $1,500,000. Kangaroo Airlines has decided to increase the average full passenger fare to $80. How many of passengers are needed to generate an after-tax profit of $400,000, if the company tax rate is 30 percent (round up)?

Treatment for Peri-Implant Diseases

Treatment for Peri-Implant Diseases Abstract Introduction: One of the substantial changes in dentistry is the development of implant science. Along with the development of applications, implant science practitioners will face an inevitable challenge which is how to deal with such problems. Recent conducted researches are more concentrated on surgical and prosthetic techniques, while the treatment for peri-implant diseases is still incomplete. Therefore, the aim of this review research is to provide a broad and descriptive overview on peri-implant diseases and to suggest the related treatments. Materials and Methods: Scientific articles were collected by electronic searching through EMBASE and Medline and since controlled clinical trials were limited in this field, no limitation was imposed on the evaluated articles. Moreover, review articles and meta-analysis were used. Results: For implants that bone resorption has affected less than 50% of the implant length, the evaluation is thoroughly recommended. Regarding cases with a range of less than 2mm, the treatment plan will be more inclined towards non-surgical methods and should be treated by Peri-implant mucositis. If the bone resorption is more than 2mm, surgical methods are proved to be more effective and in the cases which has extended more than 50% of the implant length, it is better to remove the implant. Conclusion: By increasing the range of annual dental implant, peri-implant diseases have become a serious challenge in this field. The proposed treatment plan will be a manual for dentists regarding on how to deal with implant problems; although further researches are required to approve the proposed protocols. Keywords: dental implant, disease, peri-implant inflammation. Introduction The success of an implant treatment is approved through various studies (1-4); however, further evaluation is needed on how to treat peri-implant diseases. One of the confirmed causes of dental implant failure is bacterial plaque along with extensive loading (5). Peri-implant diseases include non-specific inflammatory reactions that occur in host tissues (6-9); while the cases of inflammation in soft tissues are known as peri-implant mucositis, which is often considered a reversible reaction. Clinical characteristics of peri-implant mucositis include bleeding when being probed, peri-implant colitis, increase in probe depth (often as false pocket), or erythema and redness of the implant that surrounds tissues (10). It must be noted that symptoms are not necessarily limited to these cases. Moreover, when the inflammatory lesion strikes the bone, it is called peri-implant (11). Peri-implant is an irreversible process and bone resorption in radiography, bleeding, pus discharge during probe, increased pocket depth, ache, or fistula are among its characteristics (12). A loose implant is considered as a â€Å"failed implant† (12); while a â€Å"failing implant† is usually a progressive bone resorption with no looseness. It is a matter of the utmost importance to pay attention to practical differences of these two expressions. Dental implants may fail in various phases: Early failing: Occurs when the absence of initial osseointegeration is due to the inability of reaching the primary bone to implant contact. Factors that can be suggested in this case include early loading, surgical trauma, or incomplete/inappropriate healing response (such as patients with immune suppression, AIDS) (13, 14). Late failure: Happens after the initial integration of physiologic remodeling and loading. Bacterial infection and excessive loading are among the main factors in late failure (15). Failure due to the first year of loading is not prevalent (16). Ailing implant, also defined as peri-implant biological problems, is referred to the limited diseases of peri-implant’s soft tissue that do not affect the supporting bone tissues. On the other hand, loosing non-progressive connections and no looseness are its characteristics (17, 18). Peri-implant inflammatory processes are roughly similar to what happens around the tooth, except in the cases that peri-implant infections are initially less resistant to destruction due to the existence of periodontal ligament (19, 20). In other words, unlike the presence of fibers that are vertically placed around the tooth, peri-implant fibers are mostly parallel because of the absence of cementum. Moreover, the blood supply in peri-implant has been reduced in comparison with tooth (20). The aim of the present review article is to evaluate the causes of peri-implant diseases and its related treatment approaches. Materials and Methods: By electronic searching through EMBASE and Medline, the scientific articles were collected and since controlled clinical trials were limited in this field, no limitation has been imposed on the evaluated articles. Moreover, review articles and meta-analysis were used. Words like Mucositis peri-implant, treatment, peri-implantitis, and implant complications were used while searching for articles. Results: The prevalence of peri-implant diseases was often suggested by retrospective studies (21-23). Frasson et al. (24) indicated that more than 90 percent of peri-implant tissues have some inflammatory response. They have also reported 28% prevalence regarding the mentioned diseases. Roos-Jonsaker et al. (21) stated the prevalence of peri-implant mucositis as 48%, whereas 6.6% of implants have had the peri-implant. Generally, defining the prevalence of peri-implant diseases is slightly difficult due to the application of various protocols, different follow up periods, various implant systems, designs, and practical diameters. On the other hand, related information on implant placement area in terms of bone width and height or its position in mouth cavity is not fixed in various studies. It is said that, the primary cause of inflammation in peri-implant tissues is the resultant infection of anaerobic bacteria (25, 26). Initial evolution of periodontal pathogens in the biofilm of implant levels is reported in edentulous people (27) and it is similar to what has been identified in tooth (28-31). Periodontal pathogens could be colonized in implant level 14 days after mouth cavity exposition and a complicated sub-gingival microbial biomass will shape within 28 days after the implant exposition (32). Sato et al. (33) has clearly shown the presence of most periodontal pathogens in bone resorption cases compared with peri-implant mucositis. Peri- implant inflammation could lead to bone resorption and if it is not managed properly, it could cause implant loss. Furthermore, they illustrated in several cases that the existence of more than 5mm remnant pockets after the treatment of active periodontal disease can increase peri-implant and implant loss (34). This issue underline s the significance of accurate diagnosis in the initial phases of the disease and the necessity of appropriate and timely intervention. Managing and treating peri-implant diseases Controlling peri-implant diseases is a difficult and unpredictable process. One of the most important factors in their treatment is to evaluate implant looseness. The implant must be removed immediately if it comes loose during clinical check, after examining the possibility of abutment screw or prosthesis looseness (15, 18). This type of decision-making is in line with Pisa implant health test criterion, in which three groups are introduced as implants status (compromised success, failure, and satisfactory) (12). In this classification, failure is considered as a loose implant. Generally, looseness of the implant is the indicator of weakened BIC; therefore, a dentist must consider the situation as a criterion and instruction for deciding to whether keep the implant or not. Treating peri-implant mucositis When the implant is not loose, the next step is to identify the presence or range of bone resorption. If no resorption was detected, the diagnosis of peri-implant mucositis is highly probable, which is called Ailing implant (18). On the other hand, if the bone resorption has occurred, we would be facing a peri-implant, known as failing implant. Peri-implant diseases, including peri-implant mucositis, are infectious illnesses caused by Gram-negative pathogens in periodontal (35-37). Similar to the natural tooth, preventing the growth of biofilm and removing it from the implant must be the first phase in preserving the health of peri-implant soft tissue. Hence, treatment methods for peri-implant mucositis has nonsurgical basis and initially consist of mucosa and submucosa scaling. Synthetic treatments, including mechanical debridement and the application of non-microbial factors (such as chlorhexidineand essential oils), have been studied with caution to prevent damaging hemidesmosome joints at sulcus base and satisfactory results were obtained (38-40). However, most studies have proposed the use of antiseptics, the effects of topical antibiotic agents, and irrigation with antibiotics as supplementary treatments in mechanical debridement (41-43). The important point is that, studies have reported some significant advantages regarding the use of such agents in reducing index plaque. Schar et al. (44) indicated that the effect of nonsurgical treatments by photodyna mic therapy is similar to topical antibiotic; however, removing the whole inflammation has not been seen in treatment methods. Various surgical and synthetic methods were employed for surviving and treating ailing implant, which include debridement, decontamination of implant, and regenerative methods (45-52). Nevertheless, determining the best treatment method is not possible due to the variety of clinical conditions. Peri-implant treatment Peri-implant is considered as one of the main concerns in implant treatment. This obstacle is about peri-implant bone resorption with no looseness. For successful treatment of this problem, dentists must realize the range of bone resorption as their first step. Since the common two-dimensional radiographs have low sensitivity and cannot accurately identify the initial lesions (53), implants prognostic evaluations are limited through these diagnostic methods. On the other hand, the treatment of implants with bone resorption is unpredictable in any way, because the mechanical loading of these implants could endanger the long-lasting success (54). In the cases of bone resorption extending to more than 50% of the length, it is highly recommended to remove the implant and after the reconstruction of hard and soft tissues and obtaining acceptable results, it could be replaced in the area. Although these conditions are treatable by Guided Bone Regeneration (GBR), concerning the conducted re searches in this field to achieve this osseointegration is extremely difficult and unpredictable (55). For implants with less than 50% bone resorption, the case must be evaluated accurately. If the resorption is less than 2 mm, design is administered by nonsurgical methods, which is similar to peri-implant mucositis treatment. Nonsurgical treatments have been evaluated by different strategies (56-64). Mechanical debridement, regardless of the technique type, is not individually useful in removing the lesion and complete halting of peri-implant diseases (56). In other words, conducted studies on dogs, in which suture was the cause of disease, has shown favorable results in the form of reduction in periodontal pathogens (57), as well as improvement in clinical parameters such as probe depth reduction, adhesion improvement, bleeding on probe (58), and plaque index due to mechanical treatment. Synthetic treatments along with systemic antimicrobial (amoxicillin, metronidazole, tetracycline and clindamycin) (59) or topical antimicrobials (61, 62) (tetracycline fibers, minocycline microspheres and chlorhexidine gel) have shown a general reduction in number of pathogens and improvement of clinical parameters (index plaque, pocket depth, adhesion limit, and BOP). Laser is suggested as an alternative to mechanical debridement (64) and encouraging results has been reported; however, there is limited information on functionality, useful dosage, and probable effects on the bone, which indicates further research is needed. Consequently, it is worth mentioning that the obtained improvements is limited to clinical parameters and as published in various numbers of researches, not a single case has received the treatment completely. Accordingly, we cannot treat an advanced peri-implant through only nonsurgical method, expecting successful and predictable results. Exception can be made w hen bone resorption is limited and healing is facilitated by nonsurgical methods. Surgical methods are recommended when the bone resorption is more than 2 mm but has affected less than half of the implant length. Serino and Tutti (65) has stated that the success of surgical treatments in peri-implant diseases is related to the range of initial resorption. The employed peri-implant surgical methods is similar to the applied methods in periodontitis and the basic principles, including the removal of pathogens, are used in all the mentioned issues (25). If the aim of treatment is to preserve the bone, pushing the flap aside, similar to flap with apical position is performable (58). Regarding cases in which bone contour modification is considered, bone surgical methods are recommended. In surgical methods, the basic treating principles are the decontamination of infected implants (25). Nonetheless, retaining the integrity of the implant is a considerable challenge for clinicians. Variou s methods have been introduced for implants debridement. Favorable results were achieved in a study that chemical agents, such as metronidazole gel have been used as a flap (58). Although the range of the obtained bone remodeling is minimum, evidences were presented to prove the functionality of abrasive pumices by electric toothbrushes with rotational motion for the purpose of decontamination (66). The comparison of various debridement and decontamination methods, including Air-power abrasive, citric acid, normal saline, gas impregnated with chlorhexidine, or the combination of these methods, did not illustrate a significant difference in terms of bone regeneration and reintegration (67). According to a case report, using flap surgery ( along with decontamination by hydrogen peroxide ) with systemic antibiotic have caused an improvement in clinical parameter (Bleeding on probing) in long term and also halted the disease (68). Irrespective of implant decontamination methods (the com mon mechanical methods, chemical agents, Air-abrasive, laser, saline, and ultrasonic), flap surgery with implant decontamination is a treatment which improves and subsides inflammation, reconstructs the appropriate bone contour around implant, and halts the bone resorption. Bone respective surgeries around the contaminated implant (such as replacing implant levels, implantoplasty) can be performed along with respective surgeries for contour modification and bone anatomy. The obtained results indicated that, implantoplasty has the potential for more improvement compared to debridement with prescribing antibiotics(49). To provide remission and achieve health status in surrounding implant tissues, reintegration is vital and to reach that in a failing implant, various generative methods have been employed and different graft materials have been used to increase the range of BIC. Graft materials including xenografts, allografts, and alloplasts with/without membrane were used for this purpose (46, 47, 51, 69). These studies have shown the improvement of clinical and radiographic parameters as the reduction of probe depth and filling of lesion. There is no strong evidence in this field to support the usage of membrane, while in cases that membrane is used, its exposition is reported as a relatively common problem (66). Some studies proposed resorbable membranes to prevent exposure effects and reduce re-surgeries for removing non-resorbable membranes (51, 52). Currently, despite the lack of consensus on the privilege of a certain membrane, this is highly recommended. Dentists must carefully examine the c linical condition of patients and adopt the ideal treatment strategy based on the proposed methods. There are various methods to prevent the outbreak of disease around a implant, especially in patients with periodontal records, sensitive to peri-implant diseases, and more susceptible to colonization of pathogens (70-74). However, as long as the patient is in a good state of health and attends the follow-up sessions regularly, the issue is not a definite prescription for dental implants (75, 76). It must be noted that peri-implant soft tissue inflammation is possible, even in patients with no periodontal record as well. Accurate elimination and the removal of remnant infection is a prerequisite treatment, since the remaining teeth can act as a source of periodontal and bacterial pathogens. Early pathologic detection is a significant factor in preventing disease progress and long retention of dental implant health. It is worth mentioning that, the depth of peri-implant probing is not considered as a reliable method to check the health of a peri-implant (77) and radiographic evaluatio ns are important, as well. Therefore, peri-implant probing and probe depth enhancement are related to adhesion loss and bone resorption (78, 79), which could be a suitable method for evaluating the adhesion limit. It must be noted that, the accuracy of evaluation methods is a limitation and also, bitewing and peri-apical radiographs are helpful in this field (80). Consequently, a decision tree has been defined to control peri-implant diseases to be used as a manual (81-83). In order to treat and evaluate the peri-implant problems, long term and periodical clinical and radiograph evaluations, along with their comparison to the criteria are needed. Since peri-implantitis and periodontitis are not curable diseases and relapse is probable, longtime retention periods in patients to control and prevent is the matter of the utmost importance. Conclusion By the increase in number of annual implant replacements, peri-implant diseases has become a challenge. The proposed treatment in this project will be a manual for dentists to confront the issue. To confirm the provided protocols, further studies are required in this field. Conflict of interest: None declared.

Cause and Effect Essay: Deteriorating Health Causes Problems for Elderly Drivers :: Cause and Effect Essays

Driving is a simple task that many of us do on a daily basis. Most people are safe drivers, while a few are incapable of driving safely. Safe and capable is how most senior citizens can be viewed; however, there are some factors that can make a senior citizen dangerous behind the wheel. Some of the problems with the elderly today are that their reflexes react slower, they are hearing impaired, or a physical health change can be a big problem. Research has shown everyone ages differently and growing old does not necessarily mean a person becomes a safety hazard on the road. Much depends on the person's physical and mental health as the years pass. Because people age differently there should be certain test given to the elderly after the age of 65. First, an annual hearing test should be given to the elderly. About thirty percent of those over age 65 are hearing impaired. The ability to hear is more important to driving than most people realize. Hearing can warn a driver of danger signals like the sound of screaming sirens, honking horns, or screeching tires. There are occasions when a driver can hear a car but can't see it because of a blind spot. Good hearing helps drivers to be sensitive to what is happening on the roadways around them. Secondly, An annual visual acuity test should be given to the elderly. The elderly are not tested periodically so more often than not visual changes occur and go undetected. Passing a simple eye-test should guarantee clear sight. But many elderly people have visual defects that make it difficult for them to see road signs and pedestrians. Senior citizens may need to slow their vehicles to read a road sign, which can put them at risk for an accident with faster traffic. If they do not slow down, the risk may be smaller, but they cannot read the sign. Obviously, challenge of driving is not one that can be easily solved for the elderly. Lastly, a test on sensory motor skills should be given to the elderly. Cause and Effect Essay: Deteriorating Health Causes Problems for Elderly Drivers :: Cause and Effect Essays Driving is a simple task that many of us do on a daily basis. Most people are safe drivers, while a few are incapable of driving safely. Safe and capable is how most senior citizens can be viewed; however, there are some factors that can make a senior citizen dangerous behind the wheel. Some of the problems with the elderly today are that their reflexes react slower, they are hearing impaired, or a physical health change can be a big problem. Research has shown everyone ages differently and growing old does not necessarily mean a person becomes a safety hazard on the road. Much depends on the person's physical and mental health as the years pass. Because people age differently there should be certain test given to the elderly after the age of 65. First, an annual hearing test should be given to the elderly. About thirty percent of those over age 65 are hearing impaired. The ability to hear is more important to driving than most people realize. Hearing can warn a driver of danger signals like the sound of screaming sirens, honking horns, or screeching tires. There are occasions when a driver can hear a car but can't see it because of a blind spot. Good hearing helps drivers to be sensitive to what is happening on the roadways around them. Secondly, An annual visual acuity test should be given to the elderly. The elderly are not tested periodically so more often than not visual changes occur and go undetected. Passing a simple eye-test should guarantee clear sight. But many elderly people have visual defects that make it difficult for them to see road signs and pedestrians. Senior citizens may need to slow their vehicles to read a road sign, which can put them at risk for an accident with faster traffic. If they do not slow down, the risk may be smaller, but they cannot read the sign. Obviously, challenge of driving is not one that can be easily solved for the elderly. Lastly, a test on sensory motor skills should be given to the elderly.

Tuscany & Siena Essay example -- History Historical Tuscany Europe Pap

Tuscany & Siena The central region of Tuscany includes the following provinces:? Arezzo, Grosseto, Florence, Leghorn, Lucca, Mass-Carrara, Pisa, Pistoia, and Siena.? The total area of this region is 8.877 square miles. A Chorological History of Tuscany The word Tuscany comes from the Tusci, Tuscans or Etruscans.? Etruria (their country) at one time comprised Tuscany and the northern part of Lazio.? Charlemagne occupied northern Italy in the 8th century AD, at which time the name of Tuscia or Toscana became restricted to the area.? The counts of Lucca then utilized the region as a frontier district.1 In the 10th century, the House of the Attoni of Canossa rose to power.? After this period, prosperous towns began to assert their independence; the rise of communes in Italy had begun.? In Tuscany, the first communes were Pisa, Lucca, and Pistoia, as well as Siena, Florence, and Arezzo.? After Matilda of Tuscany (a decendant of the House of the Attoni of Canossa) died in 1115, a struggle over the region ensued between the popes and the emperors.? As a result, the Tuscan cities further confirmed their independence.2 In the 12th and 13th centuries, Pisa, backed by Siena and Pistoia, was contested by Florence, Lucca, and Genoa.? After being defeated by Genoa, Florence rose to be the leading city of Tuscany.? In Florence, the standard form of Italian was being developed through the Tuscan dialect of that region.3 The Medici dynasty then ruled Florence for most of the later medieval history.? The Medici?s were the most powerful family in Italy, and had gained their wealth in banking.4? Most famous of the Medici?s is Loreno il Magnifico, or Lorenzo the Magnificent.? During his rule, he continued to support the atmospher... ...d.? p. 33. 8 Ibid.? p. 34. 9-10 Italy:? Tuscany. The New Encyclopaedia Britannica.? 15th edition.? 1992.? p. 253. 11-13 ?Ibid.? p. 253. 14-15 ?Ibid.? p. 254. 16 Jepson, Tim.? The National Geographic Traveler:? Florence & Tuscany.? Willard, Ohio:? R.R. Donnelley & Sons.? 2001.? p. 194. 17-18 Ibid.? p. 196. 19 Ibid.? p. 204. 20 Ibid.? p. 194-195. 21 Ibid.? p. 204. 22? Ibid.? p. 10. 23-24 Ibid.? p. 227. 25 Ibid.? p. 232. 26-27 Ibid.? p. 266. 28-29 Ibid.? p. 274. 30 Ibid.? p. 275. 31 Ibid.? p. 49. Additional sources of note: Bethemont, Jacques, and Jean Pelletier.? Italy:? A geographical introduction.? New York:? Longman.? 1983. Hook, Judith.? Siena:? A City and its History.? London:? Hamish Hamilton.? 1979. Schevill, Ferdinand.? Siena:? The History of a Medieval Commune.? New York, New York:? Harper.? 1937.

The Female Reproductive System :: essays research papers

The reproductive system is one of the most vital systems because it determines whether a species will survive. The reproductive system produces human offspring. One of the most prevalent diseases of the reproductive system is prostate cancer. Prostate cancer occurs when the cells of the prostate begin to grow and divide uncontrollably. One out of six men will be diagnosed with prostate cancer in the United States. Some of the key parts of the reproductive system are to learn how a female egg is fertilized by a male sperm cell, about the parts of the male and female reproductive system and learn about prostate cancer. The male reproductive system works to create sperm and then release it into the female during sexual intercourse. The organs in the system are the testes, the epididymides, hanging in a skin bag called the scrotum, the sperm ducts, the prostate gland, and the penis containing the urethra. The testes are also known as sperm glands. They make tiny sperm cells called spermatozoa. They also produce hormones especially testosterone (this activates the production of sperm cells). Epididymides are tightly coiled tubes on each side of the testes. They help sperm become mature. The sperm ducts carry fresh sperm towards the outside. The ducts join with the urethra inside of the prostate. The urethra carries the sperm through the penis to the outside. This pathway is also known as the male reproductive tract. The parts of the female reproductive system work together to produce pin- head size eggs that join with a male's sperm to fertilize one of the eggs. The system nourishes the egg until it forms a full-grown baby. Then, once the baby is born, it produces milk for the baby. The main parts of a female reproductive system are the ovaries, the oviducts (also called the fallopian tubes), uterus (womb), vagina, vulva and the breasts (where the milk for the baby is released). The ovaries are called "egg glands". They store tiny eggs called ova. These will develop into a baby, if a man's sperm fertilizes them. The ovaries also produce hormones. The two oviducts each link the two ovaries with the uterus. They carry the ripe eggs to the uterus. When a male fertilizes a female's egg, it usually occurs in the oviduct. The uterus is where the fertilized egg grows and is nourished until it is ready to come out. At first, the uterus is about the size of a baseball or a tennis ball.

Arnold Fiend/ No Friend Essay

A protagonist by the name of Connie in the story short story entitled â€Å"Where are you going, Where have you been† by Joyce Carol Oates, soon learns that her trashy daydreams and self-absorbed behavior only leads to disaster by way of a man named Arnold Friend. Arnold Friend character in this story represents the devil. Connie, a horny high school freshman shows a strong disdain for family values but more concern with social reputation and slutty appearances. As the summer approaches she and her high school girlfriends obnoxiously parade the town seeking amusement from boys. Sneaky and scantily clad, Connie deceives her parents on a regular basis. While around her parents Connie dresses conservative and behaves graciously, reversely, in company of her friends she goes for the hooker look and carries herself as if she were a mindless teenage squander. Soon trouble finds it way in this rebellious teen’s life as she become more curious about her developing sexuality. In this exciting short story, Joyce Oates thrilled the reader with an intense built up suspense followed by a promising and thought provoking climax that not even the main character/ Connie could see coming. The story of a young naive and considerably dense girl takes place in a country suburb in a small and slow paced town. The story is told through the eyes of a mature, relaxed elder. The reader recognizes the use of music, as it holds a hypnotizing effect upon the young socialite as she endeavors a journey that leads to disaster. Vain and socially obscure, Connie feels confronted with the constant comparison of her older and more mature sister named June. More accepted and valued by her parents, June assisted in household chores and earnestly saved money. By ontrast, Connie’s friends did not accept June; she was favored more by her parents. â€Å"She sat on the bed, barefoot and listened for an hour and a half to a program called XYZ Sunday Jamboree, record after record of hard fast shrieking songs, she sang along with† (Giota/Oates) Following the need to engage in rebellious and worldly activities, Connie held immature aspirations of seeking thrills, the main character foolishly wastes her time thinking of nothing and listening to music all day, she shows no thought or action of obtaining more substance in her character. Connie’s worldly and promiscuous behavior soon attracts the devil himself. Honestly speaking, with the time Connie spent daydreaming about trash, she could have sought to become enlightened and about anything, be it family or world issues, but instead she chose to be a lofty regular at a local burger joint. Jane Barstow from the Salem press analyzes Connie’s actions: â€Å"For Connie, â€Å"the bright-lit, fly-infested restaurant† is a â€Å"sacred building† and the omnipresent music is like a â€Å"church service† always in the background, something on which she can depend. As if to parody Christian symbolism, Oates describes the â€Å"grinning boy,† holding a hamburger aloft, which caps the bottle-shaped restaurant. It is here that Connie finds the â€Å"haven and blessing† otherwise missing in her life. Barstow, (Jane) M. â€Å"Where Are You Going, Where Have You Been?. † Masterplots II: Short Story Series, Revised Edition (2004): 1-3. MagillOnLiterature Plus. Web. 6 June 2012. Sadly, it was Connie’s idle mind attracted the devilish and scheming Arnold Friend. Connie refused to go to a Sunday BBQ with her family and chose instead to idle at home alone. Arnold Friend, a deceitful thirty- something portrays himself as a innocent eighteen year old he approaches Connie and ultimately rapes her. Through his convincing tone and devilish persistence, Arnold friend is viewed by most literary critics as Satan himself, The story has been subject to differing interpretations by various critics. It has been seen as an inverted fairy tale in which Connie is joined not with Prince Charming but with the Prince of Darkness. These readers have pointed out similarities between Arnold Friend and the devil: his disguise, his supernatural knowledge of the whereabouts of Connie’s family, his ability to lure Connie to him against her will, even his very name, which is by no coincidence close to â€Å"Arch Fiend. (Korb) When we take a look at the sinister character of â€Å"Friend† it easy to interpret him as the devil. Take out the â€Å"r† in Arnold Friend’s name and you clearly discern what Arnold represents; an old Fiend. Connie was attracted to Friend’s gold car, a color that is divine and often classified as the color of the gods. Before raping Connie, the satanic Friend inserts a boot in between Connie’s front door, â€Å"One of his boots was strange at an angle, as if his foot wasn’t in it† (592). The ways the reader of this short story can distinguish Friend’s character to be the devil is by noticing through the story Friend has trouble standing in his boots. Surely, Friend, like Satan has Goat leg, Clearly that is why he cannot stand in his boots. Exploring this further, The words scribed on Friends carâ€Å"MAN THE FLYING SAUCER† indeed has the same letters that spells out â€Å"HESATANLUCIFER† . † Through it all, however, she privately harbors innocent dreams of ideal love. One day, while home alone, she is approached by a strange man ominously named Arnold Friend, who is determined to seduce her and take her away. Rather than use force, Friend insinuates his way into Connie’s mind and subdues her vulnerable and emerging sexuality† Mann, Barry, and Alvin K. Benson. â€Å"Joyce Carol Oates. † Critical Survey Of Short Fiction, Second Revised Edition (2001): 1-7. MagillOnLiterature Plus. Web. 6 June 2012 Ultimately, â€Å"Where are you going, where have you been, expresses the need for teens to be conscious and active in positive thoughts and aspirations. The main character had a host of troublesome thoughts and instinctively acted upon them. When people are not present minded they become inhibit dangerous and undesirable lifestyle. The need to be present minded as a young person is great for such as reason as this. Rape and violence not only occurs when you don’t expect it, but it also occurs when are empty minded and not aware. In the perspective of a young person, Cars can represent freedom, popularity and liberty, but In the story, Connie was attracted to Satan through his car and the persuasion. Considering a conscience and active Connie, this rape would not have existed. In closing, Arnold and his secret code that is was scribed on his car 33, 19,17 is also a bible verse that also questions the a character of Where are you going, where have you been. It is clear that the author, Joyce Carol oats his finessed the idea of an eternal presence in this book. Using this story as a warning and as an example of what an idle mind brings can not only spare your life but also your innocence. Citations and sources: * Where are you going, where have you been/Intro to fiction/XJ Kennedy Diana Giota 11th ED. Where are you going,where have you been? , Joyce Carol Oates, Copyright 1970 Ontario review *A summary and analysis of Where Are You Going, Where Have You Been?. Barstow, Jane M. Where Are You Going, Where Have You Been?. † Masterplots II: Short Story Series, Revised Edition (2004): 1-3. MagillOnLiterature Plus. Web. 6 June 2012. * Korb, Rena. â€Å"An overview of â€Å"Where Are You Going, Where Have You Been? †. † Short Stories for Students. Detroit: Gale, 2002. Literature Resource Center. Web. 13 June 2012. ** Where are you going, where have you been/Intro to fiction/XJ Kennedy Diana Giota 11th ED. Where are you going ,where have you been? , Joyce Carol Oates, Copyright 1970 Ontario review(592)

Max Weber’s Bureaucracy

In his article entitled â€Å"Bureaucracy†, Max Weber considers the structure of offices and management of organizations both public and private. He tries to construct a stereotype of these organizations through the use of a set of characteristics that he deems should be possessed by such groups. Furthermore, he also ventures his discussion into the characteristics of a bureaucratic official. The official to be thought of as bureaucratic thus should qualify these set of characteristics.A person possessing such characteristics is then judged as qualified and appropriate in office. However, if dispossessed of these characteristics, he is not fit for such positions in office. In expressing these ideas and concepts of bureaucracy, Max Weber attempts to impart the significance of office management in organizations. Therefore organizations, if not adopt Weber’s principles, should create their own set of attributes for each office in their circle to make the organization funct ion well. Weber introduces six important characteristics of a functional bureaucracy.First, he requires that organizations have a fixed set of rules for each governing area or portion of the organization (cited in Shafritz, 2005). Each organization should have different sections with a permanent and defined scope of governance and duties. Second, there exists in the organization a certain hierarchy of officials wherein subordinated officials are supervised by higher officials although supervising persons have no absolute power on subordinate officials. Third, the organization should have documentation of its progress and activities through written files.Fourth, officials should have a valid and qualified training to be appropriate for each office. Fifth, although the official has a limited tenure, he is expected to give his best and complete effort for the organization. Last, the set of rules and regulations could be learned by all officials (cited in Shafritz, 2005). Besides these characteristics, Weber also proposes that upon abiding all these characteristics, the position of an official becomes a vocation and that it possesses certain duties, responsibilities, rights and privileges including social security (cited in Shafritz, 2005).The concepts imparted by Weber are of great importance especially to organizational management. Through these characteristics introduced by Weber, the individual seeking to construct an organization could model a practical structure of governance and management. Furthermore, it is also helpful to people who wants to restructure the framework of their organization. It is interesting to note that the author explains his thoughts in a very effective and comprehensive technique through the use of comparison.He compares his image of a bureaucratic organization with those organizations of ancient history including patrimonialism (cited in Shafritz, 2005). Through this effort, the author convincingly illustrates the advantages of burea ucracy without even explicitly stating them. As a whole, the concept of bureaucracy was very impressive since it offers an efficient structure of organizational management. Furthermore, Weber’s explanation of principles both in public office and private economic organizations makes it more even appealing.Nevertheless, readers would also sense an ideal concept of bureaucracy that eventually will make them wonder if such ideal principles are actually realistic in nature. Yet again, in real world organizations, these principles are useful and applicable; applicable in a sense that, bureaucratic organizations should really have a set of rules and duties as well as rights and privileges for officials. Weber’s bureaucracy is a typical yet practical structural model of bureaucratic organizations.Its significance lies in its extensive application for budding organizations and reformation of existing organizations. In the real world, useful tips such as these should be taken in to account in creating positions in office. By doing so, the organization becomes more systematized and effective. Thus, generating a clear set of goals and a straightforward means of achieving these goals which is what an organization is all about. Reference Shafritz, J. Ott, J. S. & Jang, Y. S. (2005). Organization Theory. 6th Ed. USA: Cengage Learning.

Family structure Essay

Abstract Throughout the course of history and from the time that human beings began to modernize and grow into civilizations, the beliefs of what was thought normal, the distinct ways of living; have greatly changed over time. One certain belief that is focused in this paper is family structure, the contrast there is between nuclear families and the extended ones. Although the United States has now a dominant structure, which is nuclear families, it wasn’t always like this. It alone has many different norms of family structure due to differences in socioeconomic status, the government, religion, media, culture, etc. Moreover, do other countries. One must think how these types of influences also play a key role in other parts of the world, for example the Latin-American countries whose main structure is extended families. This paper will focus on family structure in United States but Latin America as well. How has family structure changed over time in the United States? How has family structure changed in Latin America? How do these two different parts of the world, differ from each other and how do they compare in terms of family structure and what influences them? Finally, where might the future of family structure be headed towards, in both of these regions of the world? Keywords: Family Structure U.S, Family Structure Latin America Modernized Family Structure in the   United States and Latin America Family structure is a concept that has changed over time. As complex as it is, it can have a variety of structures, or forms. There isn’t a single definition for this term, as in there is not only one unique model of family, there’s no stereotype for it. As known families and the changes within them, are different from country to country and around the world, this is due to the fact that there’s different customs, values, morals, cultures and traditions, education, marriages, fertility rates, economy different industrialization levels among those countries, etc. However, the more outstanding change has occurred between nuclear families and extended families, because those are the two main family structures, and the ones who seem to be changing in this modern world. The previous mention facts provide  the reasons why this is happening and also how can it become in the future if it continues this way. The United States is a great example of modernization and these changes in family, because it went from a large number of extended families to an increasing number of nuclear families. On the other hand, there are the Latin American countries, that even though they have also modernized, they still have more extended families due to culture, traditions or education reasons. Using as an example this two different regions, which are completely different economic and culture wise. It will be easier to show differences and similarities that Latin America has undergone compared to the United States of America over time and why it is this way. Types of Structures Family is a social institution that unites people to cooperate with one another in groups, with the purpose of taking care of each one in the group. Therefore, there is not a specific model for what a family should look like. There are different types and ways of families living in households all around the world. For example: One-parent families, composed by single mother or father; families with couples that aren’t married, Blended families; singlehood, single independent people, adoptive families, single childs, etc. However, the two predominant types that have evolved over time and conflict with each other, those are extended and the nuclear families. The Nuclear family also known as â€Å"conjugal family† is a family composed of the two spouses and their children, based on marriage. The Extended family is composed of parents and children as well as other kin; this being grandparents, uncles, cousins, etc. This group is also called â€Å"consanguine family†, because everyone shares blood type. Nuclear families are often seen in industrialized societies, while extended families prevail in preindustrial societies. United States Family Structure Background The United States of America it is now a industrialized high income country that has fully developed; and in which many people seek to establish citizen ship, due to the ease of climbing the socioeconomic ladder or class mobility and also that there is that ease to economically support and provide for families in view of the opportunity there are. Then again, it wasn’t always  like this, economy and the U.S. wasn’t as developed before, and many things were different. Analyzing it from the family’s structure point of view, it historically went from being mainly extended families to nuclear. As it is known the United States, has been colonized by European countries; more specifically England. Then it is no surprise most of its trends, cultural traits, traditions, etc. comes from Europe. Moreover, they brought education. This was why in the time during the colonization form 1600 to 1700’s, the United States was mainly based in agriculture and faming, therefore they needed of many members to help take care of lands and help with children. They were also really numerous families because lack of education. So people used to have a larger number of children, because they weren’t taught how to avoid that, and because they thought the more children they had the better. But this went changing. Moving on to the time of the industrial revolution in the 1800’s, there was an economic impulse, and now that people where more educated and started developing individually, made nuclear families grow. As a result of this situation, the number of extended families went down; however the household population was still 90% extended families. The remaining 10%, who were mostly the ones with extended recourses, rich or wealthy; as mention before, were the ones able to educate themselves, develop economy and therefore, have less children because of ease it represented. On the course of time, around the early 19th century, there was around a 1% increase in extended families due the fact that during 60’s and the 70’s there was a harder economy, so family was needed to help with economy. Regardless of this fact the multigenerational families were still in decay. Furthermore, numbers clearly show this decrease. Parents and children living with other relatives have gone from 65.5% in 1940 to 46.2% in 1970. Also; according to N. V. Benokraitis (2010), â€Å"Two generations ago, the typical American family consisted of a father, a mother, and three or four children† (p. 03). These facts show how from the time of the colonies, the industrialization to the time of the 1900’s, larger families have lessened. United States in the Present Going further; to the end of the 1900’s into 20th Century people started to see more and more changes in family households. In the U.S. it started to emerge the less dominant divers’ types of family structures, making its way to even more developed country. The nuclear family is for now the predominant one cause the economy and the culture has set it as the ideal for the times the U.S. is going through. Although, and as mentioned before these minority family types are in erosion. In the United States these changes occurred because of cause and effect reactions. The three main causes are modernization, economy, and independence. For example, marriages, they are no longer what they used to be. Due to, conflicts that cause divorces; and not to mention, the seeking of independence among men and women specially. Bianchi & Spain, (1996) argued that â€Å"U.S. families are changing in response to a number of factors, including the desire of women to have more career options ant to provide better lives for their children† Bianchi & Spain, 1996, p. 6-8, (as cited in Macionis, 2010, p.368). Also, Brown’s (1981) studies found the following: Comparing the urban and rural parts of the country, between 1950 and 1970, showed that rural divorce were lower, fewer women age 20-24 were unmarried, and the number of children per 1,000 ever married women age 35-44 was slightly higher in rural America. This shows how men and women that live in urban place, tend get more divorces or be single, than those in rural place; where it tends to be more of a family environment. As a matter of fact the individual growth and independence is also reflecting in young adults, as well as adult. Almost 19 million adults around ages 30 to 44 are single and have never been married, representing 31 percent of all people in that age group, this is happening because it is more economic to only look after themselves, rather than for a whole family. For example: in the U.S. out of 117.2 million households, 78.9 million (67%) meet the bureau’s definition of family. The rest of the living units contained single people or not relates, and in 1950, 90% of household where families (U.S.Census Bureau, 2010). Despite, that family health is decreasing; it is fact that these single people are more capable of maintaining their finance, and paying debts. Blended and one parent household have also risen this past years. Trends in culture and modern life, have led people into be more and more unsatisfied with the people they marry. The demands are higher and conflict among spouses get sometimes into violence, abuse, etc. and as a result people get divorces, get remarried or stay single parents. For  example: from 2007 to 2008 the census dated that the percentage of children under age 18 living with two married parents fell from 77 percent in 1980 to 67 percent. In addition, Single-parent American households increased from 11 percent of all households in 1970 to 29 percent. Al this, has led to this last few years, the present day in the United States. In which; nuclear families are the ideal and majority, although this is evidently changing; and also a place where, families are no longer multigenerational, and if there are still some left, they will eventually disappear. In other words, it is a reality that family is metaphorically â€Å"falling apart†, in the United States. Latin America’s family background Many aspects of Latin American history compared to the United States are the same, however the difference lays on the way thing where approached. In Latin American countries’ history, it is evident that the extended families were more of a tradition in the culture before colonies, in which indigenous or native people lived in group and large families protecting each other, similar to the movie â€Å"Pocahontas.† Indigenous didn’t have any education, another reason for why they had larger families. Subsequently, around the 1400’s Christopher Columbus and European missioner, begun colonizing Latin American countries. During this process a new race was formed, the mixed race, which was a result of, the European missioners mixed with the indigenous. Europeans provided the native and mixed races with little if any education; and strongly imposed and established their culture, religion and government trends. For more than three centuries, from 1492 until the end of the rebellions for independence in 1826, European powers ruled Colonial Latin America. Spain and Portugal dominated the majority of Latin America. After that period every Latin American country had its independence. Then again, they still kept the culture and the Catholic religion as well the multigenerational family type of European countries. This remained practically steady for an extended period of time until the early 19th century, were the time for modernization and industrialization in Latin America started. However, until that time a splitting of extended families occurred. This meaning that extended families divided into two: the poor extended families, that where the indigenous families, that because of lack of education had numerous children, and because their poverty the entire  kinship had to leave in the same household, not being able to afford land or properties. On the other hand, there was the wealth extended family that was the white European people and the mixed race successors who were accepted by their European parents; being raced as white and educated at the same level as the white who stayed in Latin America. This side of the extended families, which were wealth and well educated, where the ones who lived in multigenerational family structure due to mostly tradition, and as a sign of well being and success. Further on, in the 1900’s, like stated before modernization process incremented and then the gap among this family type widened. Leading one into successfully adapt to modern way of living; and the other, into a greater pover ty. Latin America in Present Day Since The 90’s Latin America started to follow the path into a modern society. Even thought South American countries don’t have the industrialization level as the U.S., opportunity and economy has also risen. Therefore, Family change also occurred. Basically in Latin America has now divided its family structure into three parts and for distinct reasons. The first one is the wealthy extended families, which live in larger families just because of tradition or culture, for example: as Macionis (2010) states â€Å"Many Latinos enjoy the loyalty and support of extended families. Traditionally, Hispanic parents exercise greater control over children’s courtship, considering marriage an alliance of families† (p. 378). It is basically to have a better control and help with raising of the children. Second there are the wealthy nuclear families, which have followed more North American trends. Finally there is the poor extended family, which live in larger families due to lack of education, and also because help is needed with the raising of children. Even though the economy and the development in South America is not even close the first world countries it still evolved quiet fast into modernized life, with higher numbers of nuclear family. As a matter of fact, extended families are starting to decrease. It went being the majority in developing countries of Latin American two decades ago, to being now in present day around a quarter of the population in every Latin American country. According to the ECLAC (The Economic Commission for Latin America), around 43% of the entire population of Latin America is in poverty or below, and 40% of poor people live in extended family household. Which  means it’s only a 17.2 percent, the number of extended families in present day. A better quality education during the past three decades, has been another factor that impulse Latin American young adults and adults from ages around 25 – 30 f to make decisions in whether they want fewer or more member of their family, living in a harder, more competitive, and modern world. The tradition of large families helped Hispanics to be largest minority groups in the U.S., however, today more and more Latinas are making the same decision, and opting to have fewer children. (Navarro, 2004; U.S. Census Bureau, 2008). In terms of the other family types has also changed, although it is not a noticeable, some of types as; single child families, and adoptive families, have been becoming more frequently seen in Latin-American societies. Although, individualization or singlehood for example, is not that common in Latin American, because for one, in Hispanic countries is not well seen when a person around it late twenties –early thirties; does not have a partner or spouse. Comparing the United States and Latin-America Both backgrounds are mostly the same because both regions had the same lack of education and both where colonized by European countries, although this may be true, things in family structure turned out different because of the socio-economical and development approach they had. Comparing both regions, they both underwent that family structural change, and had almost the same results they both adapted modern family structures. However, the change of the U.S is higher in rates and percentage, because as showed by the research Latin American’s still keep some of their traditions, and extended families either being poor or wealthy. Whereas the United States has industrialized and socio-economy developed that the extended families are reduced to a small fraction, moreover, nuclear families have also reduced. Concluding Research In conclusion of this research, it is clear that in the United States family structure went drastically from being multigenerational or extended, to nuclear, and is turning into independent structure, as an effect of mainly modernization, and practical living. Following the same path, it is Latin-America, whose data shows that family structure has also suffered and  evolved into more nuclear and modern families. But unlike the United States, it still conserves some part of its traditions, culture, and extended family structure, generally speaking, it still in the transition from extended to nuclear family. As a result, of still being several steps behind the industrialization level of the U.S. Nonetheless, all country will get to the same point and this metaphoric conflict there is among nuclear and extended families around the globe, will further on be nonexistent, because there will be a majority of independent people, trying to succeed and survive in a competitive world, where there’ll be no place and time for family. References Benokraitis, N. V. (2010). The changing family. Marriages and Families: Changes, Choices and Constraints (pp. 03 – 25). New York, NY: Pearson Education. Berroa, R. (1986). An introduction to Latin American society: a background to its fiction. Literature of the Americas. vol. 1. Retrieved from: http://mason.gmu.edu/~rberroa/Latinamerica.htm The Economic Commission for Latin America. (2011a.). Types of urban households,by household per capita income level, 2010. [XLS. file]. 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