Marketing Strategy Based on the Apex City of London Hotel Essay

Marketing Strategy Based on the Apex City of London Hotel - Essay Example Apex should also choose between business and tourist traffic in order to build a competitive edge. The prime location will not yield adequate returns with only a 4-star rating, and the management should plan for an upgrade. London is a major financial, tourist, and historical center. The 2012 Olympic Games and its aftermath will open additional market segments. The city also has a very large number of established and competitive lodging and boarding facilities. Hence, the long term prospects of a new hotel such as Apex cannot succeed without creative and systematic segmentation and accurate targeting as well (Payne, 2002). Apex targets both affluent tourist traffic, as well as middle-level business executives. This is apparent from how the rooms have been appointed, the location chosen, and the conference facilities (Welcome, 2007). This kind of blend is a copy of tactics followed in the past by competing 4-star facilities, but it is not an optimal strategy for Apex to follow. The hotel should either focus on tourist traffic, or specialize as a convention center. It will weaken its branding by trying to do both things (Nijssen and Frambach, 2000). It is true that London has potential revenues from both segments, but since Apex is a late entrant in a mature market, it would do better to specialize in any one of the two segments which it has served during its first year. Generic Strategy Apex could have focused on becoming a luxury hotel for top executives and for celebrity visitors to the city. The prime location chosen makes it suitable for such use. This find of focus generic strategy would have offered the management superior returns on investment (Porter, 1991). However, the hotel has chosen to compete on price. The discounts promotions, deals, and special offers, which Apex offers makes it a place of choice in the prime locality where it is situated. This generic strategy may be difficult to sustain in the long run, and it is probably not required given the enormous traffic through London. The hotel has probably lost significant cash flows through its deep discounts. The forthcoming London Olympics will impact this low-price strategy, as the hotel has established a reputation for discounts in travel circles, which it may not be able to withdraw during peak tourist arrivals (Barger & Kirby, 1995). Overall, the company has not tried to maximize returns on its ne w investment, and has probably

Business environmental and public policy Essay Example | Topics and Well Written Essays - 1000 words

Business environmental and public policy - Essay Example The wrath of industry lobbyists and right wing media was sidelining the politicians of practical nature and who are capable of dealing with the situation as it demands. The narrow margin for Gore in 2000 election is due to his practical ideas on issues like Global Warming. The people who were not at all concerned about the environmental problems and the persons who pander people rather than addressing to their real future needs were in the power. This was the cause of negligence of public safety issues like Global Warming and drawing back in curbing it. As a result the curbing of Global Warming was remained as untouchable. Moreover the campaigners who were against the curbing of Global Warming were publicizing the fact that recently the ice layers in Antarctica did rise in their thickness. Though it was said to be true the warming will be done and the sea level will rise after the extra thick ice was melt. The people who are saying that fact are taking into consideration the details of Antarctica this year. There may be an opposite evidence for their argument if they take the records of thickness of ice for over 10 years of time at the same period of the year. The controversy is that some responsible scientists and politicians like Al Gore were in support of the argument that Global warming is true and the curbing will result in no considerable devastation of economy. But the only politician talking about the controversial issues and the correct measures to be taken was defeated and the right wing media a product of energy-industry lobbyists was making the right thinking politicians a mockery of them in the view of public. They fostered a careful campaign that the curbing of Global Warming will decrease the GDP and thus destroy the economy and so the Americans should not accept to it. But the reality conflicts with that argument. The economy will not be devastated as it was publicized by the media. The growth of GDP may be affected by just 0.2% in a span of 20 years but not as devastating as it was publicized by right wing media. Moreover, the Global Warming is at alarming level that after some time it may become irreversible. By now it was felt by a Science Magazine that the curbing of Global Warming is like eradicating the Small pox from the earth. By this comparison every body can understand that at the stage reached by Global Warming just by negligence due to the lobbying of industry circles against cubing it. One can wonder why the politicians or Industrialists were against the curbing of norms. The reason may be that the norms for curbing the Global Warming will make Industrialists cut their profits and discard some new technology on which they have spent more and there were no substantial returns yet. This may leave them scared as they have to resort to older methods by facing loss in adopted new technology. The Machinery now used might find necessity to be replaced. When this happens generally the heavy industry that makes machines will flourish and there is a chance of curbing the fall in GDP growth which was predicted by the protesters of curbing methods of Global Warming. But it makes some leading industrialists to spend on new machinery and infrastructure, which is difficult to them in their terms of profit. The

Mechanisms of Adsorption of Aormatic Nitrogen Compounds

Mechanisms of Adsorption of Aormatic Nitrogen Compounds MECHANISMS OF ADSORPTION OF AORMATIC NITROGEN COMPOUNDS AND AROMATIC COMPOUNDS ON METAL-ORGANIC FRAMEWORKS (MOFs) by JUN DAI Metal-Organic Frameworks (MOFs) constitute a class of novel porous materials which have attracted significant interest due to their application in separation, storage, catalyst and sensing. Large surface area and porous cavity make MOFs excellent absorbents with huge uptake capacity. In this paper, we studied adsorption mechanisms of adsorption of indole and naphthalene on Basolite F300, Basolite A100 and MIL-100 (Fe) by two complementary spectroscopic methods. Fluorescence spectroscopy and near-UV/Visible diffuse reflectance spectroscopy study demonstrate that naphthalene is quantum confined within the mesoporous cavity in F300. On the other hand, indole is weakly electronically bound to Fe (III) CUS in F300 and forms adsorption complex with F300. Direct spectroscopic proof of adsorption complex is provided by near-UV/Visible spectroscopy and fluorescence spectroscopy. Quenching of ligand-based fluorescence of A100 by indole is suggested and we propose adsorption of indole and napht halene onto A100 via Ï€-Ï€ interaction, spectroscopic proof is provided by fluorescence spectroscopy.   Table of Contents Title Abstract Acknowledgements and Dedication Table of Contents 1 Introduction 1.1 Metal Organic Frameworks (MOFs) 1.2 Clean Fossil Fuels 1.3 Nitrogen Aromatic Compounds in Fossil fuels 1.4 Aromatic Compounds in Fossil Fuels 1.5 Methods of Denitrogenation 1.5.1 Microbial Denitrogenation 1.5.2 Hydrodenigrogenation (HDN) 1.5.3 Adsorptive Denitrogenation (ADN) 1.6 Activation of Open Metal Sites of Metal-Organic Frameworks 1.7 Adsorption of Aromatic Compounds and Aromatic N-heterocyclic Compounds on mesoporous MOFs with CUS: MIL-100 (Fe) and F300 1.8 Adsorption of Aromatic Compounds and Aromatic N-heterocyclic compounds on microporous MOFs without CUS: MIL-53 and A100 1.9 Research Objective 2 Experimental 2.1 Metal Organic Frameworks 2.2 Solvents, Aromatic compounds and N-containing compounds 2.3 Activation and Hydration of Metal-organic frameworks 2.4 Fluorescence Spectroscopy 2.5 Near UV-Vis Diffuse Reflectance Spectroscopy (near UV-Vis DRS) 2.6 Model Fuels 2.7 Solid Mixture of Aromatic and Aromatic N-hetrocyclic compounds with MOFs 2.8 Stoichiometric adsorption complex of F300 and naphthalene in eicosane matrix 2.9 Kinetic adsorption of liquid indole on Basolite F300 (FeBTC) in liquid phase 2.10 Stoichiometric adsorption complexes of indole/naphthalene with MOFs 2.11 UV radiation 3 Results 3.1 Spectroscopic Studies of adsorption of naphthalene and indole on mesoporous F300 and MIL-100 (Fe) with CUS 3.1.1 Solid Mixtures of MOFs and organic aromatic compounds 3.1.2 Fluorescence spectrum of pure naphthalene List of Figures Figure 1: Structure of MIL-100 (Fe) (see as S1 in supplementary) Figure 2: Structure of MIL-53 (Al) (see as S2 in supplementary) Figure 3: Common nitrogen compounds existing in fossil fuels Figure 4: Pathways for the transformation of quinoline Figure 5: Fluorescence spectrum of (A) 0.08 M liquid solution of naphthalene (NAP) in n-heptane, ÃŽ »exc = 280 nm, bandwidth: Exc. Slit 5 nm/Emi. Slit 5nm. (B) 0.08 M liquid solution of NAP in n-heptane with multi-Gaussian curve fitting Figure 6: Fluorescence spectrum of (A) pure naphthalene (NAP) ÃŽ »exc = 280 nm, bandwidth: Exc. Slit 5 nm/Emi. Slit 5nm (B) pure NAP with multi-Gaussian curve fitting List of Tables Table 1: MOFs used in this research and structure information Table 2: Physical property of common nitrogen aromatic compounds existing in fossil fuels 1 Introduction 1.1 Metal Organic Frameworks (MOFs) Porous materials are well studied and widely used in science and engineering industry. Recently, a novel kind of porous material ‘Metal-Organic Frameworks (MOFs)’ has emerged as potential competitor. MOFs are crystalline hybrid inorganic-organic porous solid formed by chemical metal-linker bounding1. Metal-Organic Frameworks (MOFs) constitute a class of novel porous materials which have attracted significant interest due to their application in separation, storage, catalyst and sensing. The use of MOF as stationary phase in high resolution GC separation of aromatic hydrocarbons has also gained significant attention2. In comparison with adsorption on the MOFs in gas phase which has been well studied and understood, adsorption on the MOFs in liquid phase is much less known. MOFs have extremely large surface area and porous cavity, which make them excellent adsorbents with huge uptake capacity. As a class of coordination compound repeated by metal or metal clusters as SBUs (second building units) and organic linkers, the cavity ranged between that of Zeolite and mesoporous silica3. Regarding the structures, variety of MOFs can display either 2 dimensional or 3 dimensional structures depend on different organic linkers. It is also indicated by J. R. Karra and K. S. Walton that the relation between pore size and guest molecule size plays an essential role in the adsorption4. The MOFs being investigated in this research are mesoporous and microporous MOFs. For mesoporous MOFs the pore size can vary from 2 nm to 50 nm, while for microporous MOFs the pore size is less than 2nm. Pore size can be a key in adsorption on MOFs due to micropore filling mechanism2, which suggests adsorption capacity depends on molecular cross-sectional area rather than minimum diameter. MOFs are structurally stable under ambient environment. It is reported by many authors that MOFs remain stable under increased temperature and under oxygen. In this research, our investigation mos tly focuses on several common MOFS, and their commercial names are Basolite C300, Basolite F300, Basolite A100 and MIL-100 (Fe) (MIL=Materials of Institute Lavoisier). All Basolite C300, Basolite F300 and Basolite A100 are bought commercially, and MIL-100 (Fe) is made with the collaboration of Dr. Jing Li from Rutgers – New Brunswick. Table 1 shows the basic physical information of the MOFs used in this research. Table 1: MOFs used in this research and structure information MOFs/formula Surface area/m2g-1 Pore dimension/Ã… Pore dimension Ref. BET Basolite F300 1300~1600 21.7 3D Sigma-Aldrich,5 Basolite A100 1100~1500 7.37.7 1D Sigma-Aldrich, MIL-100 (Fe) 2200 25, 29 3D 5 MIL-100 family MIL-100(M) (M=Cr, Fe, Al) refers to a family of mesoporous Metal-Organic Frameworks built up from metal clusters and benzene-1, 3, 5-tricarboxylic (BTC) linkers. These MOFs possess large surface area and have recently attracted tremendous attention for applications in adsorption and separation due to the coordinated unsaturated sites (CUS) which can provide chance for Lewis acid-base interaction between guest molecules and metal ions or metal clusters. In Metal-organic frameworks, metal sites (SBUs) are coordinated with organic linkers. Open metal sites (CUS) may be available on these SBUs. CUS are very important in gas storage, separation, sensing, catalysts, and even biological systems6. Considerable amount of research on the adsorption of small molecules have been done recently. Evidence has shown open metal sites have essential influence on adsorption property in MOFs. It is reported that open Cu2+ metal sites in HKUST-1 contribute significantly to the high acetylene storage capa city7. Moreover, MOFs with CUS such as HKUST-1 are used in chromatography separation due to its specific feature to distinguish strongly and weakly electron donating analytes8. In additional, MIL-100 (Fe3+, Cr3+, Al3+) has been shown to have strong preference to adsorb N-heterocyclic compounds (Lewis base) in mixtures910. Hence, open metal sites can be potential Lewis acid sites, the possible interactions between guest molecules and open metal sites will be examined and discussed in this paper. In our research, MIL-100 (Fe) will be used to investigate the adsorption mechanisms between guest molecules such as indole or naphthalene and sorbent MOFs. Besides MIL-100, there is a commercially made MOF named Basolite F300, which has a similar chemical composition. Both Basolite F300 and MIL-100 (Fe) are built up by Iron and BTC linkers. However, due to the poor crystallinity, the actual structure of F300 is still not known at this time. Difference in iron content and carbon content in F300 and MIL-100 (Fe) is shown by D. Amarajothi and his co-workers5. The iron mass content in F300 and MIL-100 (Fe) are respectively 25% and 21%. The carbon mass content in F300 and MIL-100 (Fe) are respectively 32% and 29%. Pore dimension in F300 and MIL-100 (Fe) are respectively 21.7 Ã… and 25/29 Ã…. Structure of MIL-100 (Fe) is shown below: Figure 1: Structure of MIL-100 (Fe) (see as S1 in supplementary) MIL-53 family There are many types of MOFs that undergo hydrolysis, while there are other MOFs that remain stable within water. Water stable MOFs start to showing potential applications in drug delivery and imaging11. Many MOFs containing Al as metal sites and amino acids as organic linkers are stable in aqueous solution, and it is also possible to synthesize them in aqueous environment12. MIL-53(M) (M= metal as Al13, Cr14, Fe15, In16, Sc17) is a common family of microporous MOFs and has excellent water stability. Figure 2: Structure of MIL-53 (Al) (see as S2 in supplementary) The one dimensional pore structure of MIL-53(Al) is built by chains of corner-sharing octahedra aluminum clusters AlO4(OH)2 and anion form of benzene-1,4-dicarboxylic acid (BDC) as organic linkers connecting infinite numbers of metal clusters. MIL-53 (Al) has rhombic channels which have dimension of 7.3 x 7.7 Ã…. A huge Langmuir surface area of 1600 m2/g makes MIL-53 (Al) an efficient adsorbent. MIL-53 (Al) has extraordinary thermal stability up to 773 K. It is believed that the structure of MIL-53 (Al) undergoes a reversible structural change during process of adsorbing/desorbing water molecules, and is described as ‘breathing’13. The so-called ‘breathing’ process interchanges between large-pore (lp) form (Al(OH)[O2C-C6H4-CO2]) and narrow-pore (np) form (Al(OH)[O2C-C6H4-CO2]H2O) 13. The lp form has a dimension of 8.5 x 8.5 Ã… and is obtained when activated upon high temperature and under high vacuum, which takes away excess free BDC acids, oxygen and water trapped in the cavity during synthesis. The lp form is capable of adsorbing water molecules in vapor at room temperature, as a result, the MIL-53 (Al) shifts to its’ np form. As shown in the formula, the np form contains one trapped water molecule every unit or cavity. Hydrogen bonds are found to form between carboxylic groups on the linkers and adsorbed water molecules. Due to this ‘breathing’ feature, applications on selective adsorption of various compounds in gas phase have already gained interest and being reported14. The np form of hydrated MIL-53 (Cr) is able to selectively adsorb CO2 in presence of CH4 in gas phase. Upon adsorption of CO2 but not CH4, MIL-53 (Cr) returns to its lp form with an increased cavity volume of 1522.5 Ã…3 from np volume of 1012.8 Ã…3. In our research, we used Basolite A100 MOF from the BASF, which is commercially available and is equivalent to MIL-53 (Al). Similarly, A100 is build up with AlO4(OH)2 octahedral clusters connecting by BDC linkers, and gives a surface area of 1084 m2/g and pore volume of 0.51 cm3/g as determined by N2 physical-adsorption at 77 K. Additionally, XRD pattern of A100 is proved to resemble that of MIL-53 (Al)18. G. Blanco-Brieva and his co-workers have studied adsorptive removal of aromatic sulfur compounds from model liquid fuels on thermally activated A10019. 1.2 Clean Fossil Fuels Combustion of sulfur and nitrogen containing compounds in fossil fuels will bring adverse effect to public health, environment and economy. It is widely recognized that nitrogen compounds are normally carcinogenic and mutagenic. Separation of heterocyclic compounds from petro-chemical feedstock has become an urgent application leading to clean liquid fossil fuels. Fossil fuel is a primary source of energy on the earth, the intensive use of fossil fuels has raised environmental concerns. Beginning in 2006, the Environmental Protection Agency (EPA) began an ambitious program aiming to reduce the sulfur content of diesel fuels. As of July 11, 2010, the EPA required that the concentration of sulfur content in diesel fuels not exceed 15 ppm20. For certain ultra-clean gasoline, diesel fuels and jet fuels, sulfur level needs to be lower than 1 ppm21. Hydrodesulfurization (HDS) of diesel fuel has become an essential research interest, while the presence of nitrogen compounds in middle-distil late oil inhibits the ultra-deep hydrodesulfurization22232425. In HDS, sulfur compounds are hydrogenated to hydrocarbons and H2S over catalyst such as Zeolites9. However, the nitrogen aromatic compounds in crude oil are found to compete for the active sites on these catalysts to inhibit a deep HDS26,27. This gives rise to the necessity for denitrogenation in fossil fuels. Moreover, the combustion of nitrogen compounds in petroleum leads to the formation of NOx oxides, which is a group of highly reactive and persistent species and contributes directly to acid rain and greenhouse effect. The life time of NOx oxides in atmosphere is 120 years before being removed or destroyed through chemical reactions. The impact of 1 pound of NO ­x on warming the atmosphere is over 300 times that of 1 pound of carbon dioxide. EPA first set standards for NO2 in 1971, setting both a primary standard (to protect health) and a secondary standard (to protect the public welfare) at 0.053 parts per million (53 ppb), averaged annually28. Also the presence of nitrogen aromatic compounds in fossil fuels can lead to poisoning of refining catalyst, which will eventually cause a decrease in yield. Thus, denitrogenation is necessary for deep desulfurization and has drawn significant interest around the world due to the increasingly rigid regulations and fuel specifications in many countries. 1.3 Nitrogen Aromatic Compounds in Fossil fuels Fossil fuels are naturally-formed fuel that contains significant level of heterocyclic aromatic contaminants. There are some representative sulfur aromatic compounds such as benzothiophene (BT) and dibenzothiophene (DBT), representative nitrogen aromatic compounds such as indole and quinoline. Nitrogen aromatic compounds content in crude oil averages around 0.3%. Although the concentration of nitrogen compounds in crude oil is relatively low, the concentration turns out to be higher throughout the petroleum distillation process. Common nitrogen aromatic compounds in fossil fuels are shown in Figure 1.129 and physical properties of nitrogen aromatic compounds investigated in this research is shown in Table 2. Nitrogen aromatic compounds in fossil fuels fall into two classes. One is non-basic nitrogen compounds including indole and pyrrole due to the fact that the extra pair of electrons on N is contributed to the Ï€ electron cloud and is not available for interaction with acids. While the other class is basic nitrogen compounds such as pyridine, quinoline and their derivatives, in which the lone pair of electrons on N is available as an electron donor. Indole is one of the most common nitrogen compounds in fossil fuels, and it has been broadly studied. And we choose indole in our research due to the fact that indole is a weakly basic N-containing compound, which means it has a potential of selective adsorption against aromatic compounds and desorption is possible and reasonably convenient. Figure 3: Common nitrogen compounds existing in fossil fuels Table 2: Physical property of common nitrogen aromatic compounds existing in fossil fuels Compounds Formula Melting Point, ÃÅ'Ã…  C Density, g/cm3 Dipole moment, D Acidity,pKa Maximum diameter, ÃÅ'Ã…  A Indole C8H7N 52~54 1.17 2.11 16.2 6.9 Quinoline C9H7N -15 1.093 0 4.85 7.2 Isoquinoline C9H7N 26~28 1.099 0 5.14 7.2 1.4 Aromatic Compounds in Fossil Fuels Fossil fuels contain significant amount of hydrocarbons, most of them are aromatic compounds and polycyclic aromatic hydrocarbons (PAHs). In this research we choose naphthalene as representative aromatic compounds, and in order to investigate the adsorption mechanism we use fluorescence spectroscopy and UV-Vis diffuse reflectance spectroscopy to investigate electronic interactions upon adsorption onto MOFs. Naphthalene is the most simple and common aromatic compounds in PAHs. And naphthalene is commonly produced in petroleum refining and is then separated from the petroleum. Purification and separation of these aromatic rings is of interest in chemical industry. Naphthalene has a molecular length of 7.2 Ã… (largest diameter determined by ChemDraw 3D) and is non-polar. 1.5 Methods of Denitrogenation Microbial Denitrogenation Microbial process is an alternative pathway for denitrogenation. Microorganisms are known to consume natural organic compounds and convert them into carbons and energy, and they are capable of metabolizing certain molecules including nitrogen compounds from fossil fuels. The degradation of quinoline is well-characterized, and the transformation pathways are elucidated by M. Benedik et al29 (shown in Figure 1. 5). The degradation of isoquinoline is less understood but 1-oxo-1,2-dihydroisoquinoline is suggested as initial oxygenated product30. According to the finding of Claus, G, indole is readily degraded via catechol or transformed directly into tryptophan30, while carbazole is relatively more difficult to be degraded. One possible degradation pathway31 beginning with angular dioxygenation has been proposed by Ouchiyama, N., which finally enters TCA cycle after conversion to catechol or tryptophan32. Mechanisms for the degradation of other nitrogen compounds such as pyridine, quinol ine, acridine and their derivatives are reviewed in detail by J. Kaiser33. Recent research in microbial denitrogenation has revealed a promising future for application in selective removal of nitrogen- and sulfur-containing petroleum. However, as a major mechanism for the removal and metabolism of organic compounds from the environment, its’ characterization of the enzymes involving in the pathways is still under research29. And it has not been widely applied to the industry yet. Figure 4: Pathways for the transformation of quinoline Hydrodenigrogenation (HDN) Hydrodenitrogenation (HDN) is usually used to remove nitrogen compounds in fossil fuels during the refinery process, and Co-Mo catalyst is normally involved in the process. However, the HDS process is accomplished by reacting with hydrogen at high temperature and high pressure. It is energy-intensive, hazardous and costly. Thus, significant amount of researches have been done on HDN in order to reach a goal of being economic and environmentally friendly. Adsorptive Denitrogenation (ADN) Another promising way to selectively remove the nitrogen compounds in fossil fuels is adsorption on a porous material, Activated carbon34353637, Zeolites38, HCL-loaded silica-aluminas39, ion-exchange resins40, meso-silicas41,42, Ti-HMSs43, microporous carbon44, activated aluminas45, Ni-based adsorbents45, and NiMOs46 have been used for ADN. While recently the use of MOF adsorbents has gained significant interest in adsorption and separation of aromatic and heterocyclic compounds in liquid phase due to its’ high capacity, high selectivity, economic importance and most importantly energy saving 47. Moreover, MOFs can even be recycled and effectively reduce the cost. Adsorptive separation via â€Å"adsorptive denitrogenation (AND)† is preferred over industrial catalytic HDN10. Specifically, selective adsorption of N-heterocyclic compounds48 in presence of aromatic and aliphatic hydrocarbons in liquid phase49 is of interest, which is investigated in this research. 1.6 Activation of Open Metal Sites of Metal-Organic Frameworks Available CUS in MOFs is essential for the adsorption of Lewis basic compounds. Thus, to fully utilize the open metal sites in MOFs, activation is needed to evacuate the water molecules which are relatively weakly coordinated on these metals. Because MOFs are strongly adsorptive molecules, humidity can be crucial to the availability of open metal sites in MOFs. Specific treatment is necessary at certain temperature under vacuum in order to activate open metal sites. And protection of the sample against humidity is critical during experiments. Interestingly, it is discovered by K. Schlichte and his colleagues that upon activation the color of HKUST-1 would change from light cyan to dark navy50. This is confirmed by E. Borfecchia and his working group using UV-Vis, a red shift at LMCT edge and appearance of a shoulder in d-d band at around 600 nm in UV-Vis spectrum is observed and explained by the removal of water51. In addition to the activation of MOFs, partial reduction of MIL-100 (Fe) has been reported by H. Leclerc and his group52. Certain metal sites in MOF can be reduced, for example, Fe3+ in MIL-100 (Fe) can be reduced to Fe2+. According to their analysis of oxidation states via IR, outgassing at 423 K for 12 hour will give rise to a greater proportion of Fe2+ sites while minority of Fe3+ sites is reduced. However, outgassing at 523 K will result in that most Fe3+ sites are reduced. Fe3+ sites are more Lewis acidic sites than Fe2+, it is easier for Fe3+ to form coordination bond with nitrogen aromatics, which are good Lewis base. 1.7 Adsorption of Aromatic Compounds and Aromatic N-heterocyclic Compounds on mesoporous MOFs with CUS: MIL-100 (Fe) and F300 Although adsorption of small organic molecules on MOFs both in liquid phase and in vapor, such as toluene, benzene, xylene isomers2, etc., has been well studied in the recent years, to our knowledge the adsorption of fuse-ring aromatic hydrocarbons on MIL-100 in liquid phase has not been reported. M. Maes and his co-workers have reported adsorption of indole from heptane/toluene mixture solution on MIL-100 family9. Thus, mechanism of adsorption of aromatic compounds versus aromatic N-heterocyclic compounds on F300 has not been studied. According to many studies, the formation of complexes in liquid adsorption is usually assumed, but there is a lack of direct spectroscopic evidence. Adsorption of small aromatic ring compounds (benzene and p-xylene molecules) on MIL-101 has been published by K. Yang, et al2. Pore-size filling mechanism is discovered and discussed in this paper, indicating that pore-size and different substrate relates with molecular selectivity of organic compounds. Ho wever, the mechanism is still not understood. Fluorescence spectroscopy is a straightforward method for studying the adsorption mechanism between guest molecules and MOFs. Yet there are rarely papers studying characterization of adsorption of aromatic compounds in liquid or solid system by fluorescence spectroscopy. It is assumed based on fluorescence spectra that Lewis acid-base interaction promotes the adsorption of pyrene on Al2O3 from model fuel using octane as solvent53. While the fluorescence spectra was collected using a model sorbent aluminum chloride in methanol instead of actual Al2O3 in model fuel, spectroscopic characterization of adsorption complexes formed by MOFs and aromatic compounds or aromatic N-heterocyclic compounds by the fluorescence spectroscopy is still unknown to our knowledge. Another useful characterization method is near-UV/visible diffuse reflectance spectroscopy (DRS), which is excellent at detecting the variation or shift in electronic states on adsorption complexes forming by metal sites and guest molecules. The DRS was used to identify the interactions between aromatic amines and MOFs54 but it has not been used to explore the interactions between metal sites of MOFs and guest molecules as aromatic compounds or aromatic N-heterocyclic compounds. Thus, we aim to investigate the adsorption of large aromatic compounds on MOFs using two spectroscopic methods as fluorescence spectroscopy and near-UV/visible diffuse reflectance spectroscopy. 1.8 Adsorption of Aromatic Compounds and Aromatic N-heterocyclic compounds on microporous MOFs without CUS: MIL-53 and A100 M. Maes and his colleagues have studied the adsorption of indole and methyl-substituted indole present in model fuel (heptane/toluene at either 80 vol. %/20 vol. % or 20 vol. %/80 vol. % combination) at initial concentration of 0.15 M on thermally activated MIL-53 (Al)9. The amount of absorbed indole intensively dropped in model fuel with toluene, which indicates a possible competitive adsorption. While no data of adsorption capacity for indole and substituted indole on MIL-53 (Al) in n-alkane solvent was reported, not enough experimental evidence or computational evidence can be used to prove the mechanism of competitive adsorption. Similarly, adsorption of indole, pyridine, pyrrole and quinolone on thermally activated MIL-53 (Al) has been studied in another paper. In this paper n-octane was used as solvent, however, no data for adsorption capacity of indole on MIL-53 (Al) has been reported55. Ï€-Ï€ interactions is suggested to be the major force that introduce the adsorption of indole or quinolone onto activated MIL-53 (Al), but no experimental evidence was given55. At the present time, no direct spectroscopic characterization of chemical bonds between aromatic or hetero-aromatic adsorbate and MIL-53 has yet been reported. Furthermore, adsorption of naphthalene on MOFs has not been reported to our knowledge. To investigate the adsorption mechanisms through fluorescence spectroscopy, it is essential to know the origin of the fluorescence from MOF itselft. It was discussed in a review paper by M. Allendorf, C. Bauer, R. Bhakta et al.56, that there are five modes for generating fluorescence in MOFs: linker-based, framework metal ions (charge transfer between linker and metal), adsorb

Anorexia Nervosa - Includes Bi Essay -- essays research papers fc

Anorexia Nervosa   Ã‚  Ã‚  Ã‚  Ã‚  In America, girls are given the message at a very young age that in order to be happy and successful, they must be thin. Given the value which society places on being thin, it is not surprising that eating disorders are on the increase. Every time you walk into a store, you are surrounded by the images of emaciated models that appear on the covers of fashion magazines. Thousands of teenage girls are starving themselves daily in an effort to attain what the fashion industry considers to be the â€Å"ideal† figure. The average model weighs 23% less than the average woman. Maintaining a weight 20% below your expected body weight fits the criteria for the emotional eating disorder known as anorexia. Most models, according to medical standards, fit into the category of being anorexic (Thompson, Colleen).   Ã‚  Ã‚  Ã‚  Ã‚  Anorexia has been known and recognized by doctors for at least 300 years. Most researchers agree that the number of patients with this life threatening disease is increasing at an alarming rate. The Rice Counseling Center defines anorexia as â€Å"an emotional disorder characterized by an intense fear of becoming obese, lack of self-esteem and distorted body image which results in self-induced starvation†. In accordance with information given by the Counseling Center at the University of Lawson 2 Virginia, the development of this disease generally begins at the age of 11 or 18. Significantly, these ages coincide with new phases of a girl’s life, the commencement and ending of adolescence. Recent estimates suggest that out of every 200 American girls between this age span, one will develop anorexia to some degree. The disease develops over a period of time during which the sufferer changes her eating patterns from normal or near normal to a very restricted diet (S.C.A.R.E.D. Website). This process can take anywhere from months to years. Clinically, an anorexic is diagnosed by having a body weight 20% below the expected body weight of a healthy person at the same age and height of the eating disorder patient. The anorexic often becomes frightened of gaining weight and even of food itself. The patient may feel fat, even though their body weight is well below the normal weight for their height. Some also feel they do not deserve pleasure out of life and will deprive themselves of situations offe... ...ily, friends, and the reasons she may have fallen into a pattern of self-starvation. As a patient learns more about her condition, she is often more willing to try to help herself recover. In treating anorexia nervosa, it is extremely important to remember that immediate success does not guarantee a permanent cure. Sometimes, even after successful hospital treatment and return to normal weight, patients suffer relapses. Follow-up therapy lasting three to five years is recommended if the patient is to be completely cured (Cove, Judy). Lawson 6 Works Cited Thompson, Colleen. â€Å"Society and Eating Disorders.† Mirror Mirror 19, October 1998. Online. Available http://www.mirror-mirror.org/society.htm Accessed 23, October 1998. Saunders, Janice. â€Å"Anorexia and Bulimia.† S.C.A.R.E.D. Online. Available http://www.geocities.com/HotSprings/Spa/3901/index.html Accessed 23, October 1998. Cove, Dr. Judy. â€Å"Anorexia Nervosa General Information.† Mental Health Net Online. Available http://www.cmhc.com Accessed 23, October 1998. Pearson, Nanett. â€Å"A Personal Recovery Story: Starving for Attention.† Attention Online. Available http://www.laureate.com/attention.html Accessed 31, October 1998.

Teaching Computer Architecture: How to Introduce the Class

Introduction: How to Teaching is simple. It does not always require creativity to do it right. It is the art of using the right teaching method for the right student personality in the right environment. How much a particular student learns in a course is actually governed partially by that learner's native ability and preceding preparation but also by the consistency of his learning style and the teacher's teaching style. Teachers' teaching plans can exceed the learning process for the students and can improve their learning quality as well if it is well-matched the students' learning styles.The concept of learning styles – which states that different learners have different needs, ways of processing and adapting information, and therefore need to be taught differently so that their learning and achievement are more effective – has been a significant area of investigation in learning theories for over thirty years. In this paper I am designing a teaching plan driven by students learning styles and compatible with the basic two types of learning styles: visual and verbal learning styles.Teaching computer architecture has been examined in many ways like prototyping [1], learning through experience [2] [3] but it hasn't addressed by matching the teaching style with the students learning styles. I chose the first lesson of the computer architecture â€Å"introducing computer architecture course to the students† as an example to prove the enhancement of this approach in teaching computer architecture. The paper is divided to some sections.The first one is setting the base knowledge of the terms that will be used through this paper starting from explaining learning styles then going to clarifying the visual and auditory learning styles. After that, I am going to implement the introduced background in computer architecture context to computer architecture course (ACCESS) at University of Colorado at Colorado Springs. Finally, I will suggest how t o evaluate the applicability and the enhancement of this proposed plan followed by a brief dissection.Page 1 Motivation: First, I was motivated by the importance of computer architecture course. Second, my motivation was also the challenges that I faced in this course thus I didn't satisfactorily understand its concepts. My reason of not fully getting the content was personal; my background knowledge that was required to this course wasn't adequate. Then I asked myself how much have the other students, who have fulfilled the prerequisite, learned? Did they get the essentials of the course?And these questions have formulated my effort presented in this paper here in order to both facilitate their learning and improve their learning quality of this substantial course. Background: A. Learning styles: Learning in an organized educational situation may be thought of as a two-step process encompassing the reception and processing of information. Learning styles can be defined as the prefe rences of an individual in a particular learning situation 4]. It refers to the preferred way of a learner to receive information.Individuals are dissimilar in how they learn. In [5], Richard M. Folder had proposed a model of learning and teaching styles in engineering education that consists of five learning styles dimensions: sensory and intuitive, visual and verbal, inductive and deductive, active and reflective, and finally sequential and global. To match the teaching method with a category of the students learning styles, it changes the way to present information or the way to organize it and sometimes both. B.Visual and Verbal Learners In his model, he had considered the visual and verbal learning styles and had categorized them in the input dimension that deals with the component of the learning process in which information is observed. People receive information in many ways. These ways may be divided into three categories, sometimes mentioned to as modalities: visual ways t hat refers to sights, pictures, diagrams, symbols; auditory ways that use sounds, words; kinesthesia ways such as taste, touch, and smell.Thus, there are visual, verbal, and kinesthesia learners. Visual learners have a reference of seeing: pictures, diagrams, flow charts, time lines, films, or demonstrations and they remember best what they see. They usually like to see the teacher's body language and expressions to better understand the content of lessons, highlight the important points of the lesson with pretty colors, and they Page 2 illustrate the concepts to fully understand and memorize it.If information is simply said to them, they will forget it easily. Auditory learners remember best what they listen to. They acquire a lot out of discussion, learn efficiently by explaining things to ACH other, take the underlying meanings of speech through focusing their listening to tone of voice, read the written materials out loud to absorb and memorize them well, and they prefer verbal clarification to optical demonstration. According to Richard M.Folder, â€Å"most people of college age and older are visual while most college teaching is verbal?the information presented is predominantly auditory (lecturing) or a visual representation of auditory information (words and mathematical symbols written in texts and handouts, on transparencies, or on a chalkboard)†. This present a problem to many learners. C. How we learn? How People Learn: Brain Mind, Experience, and School book [6] has concluded seven primary points of how people learn: 1.Leaning is facilitated when knowledge is structured around major concepts and principles. 2. A learner's prior knowledge is the starting point of effective learning. 3. Awareness and self-monitoring of learning (â€Å"meta-cognition†) are important for acquiring proficiency. 4. Learners' belief about their ability to learn affects their success. 5. Recognizing and accommodating differences in the ways people learn are e ssential. 6. Learning is shaped by the context in which it occurs. . Learning can be strengthened through collaboration.These points also were the foundations of the vision for the future science and engineering learning environment that was anticipated in the new electrical and computer engineering curriculum in 2013 and beyond [7]. In my paper, I am suggesting a plan that is in line with both points number 1 and 5. Implementation: To implement a teaching plan that focuses on visual and verbal learning styles in the computer architecture context, I will be using visual and aural tools to present the content and I will mix using them while I am explaining each concept.The aural tools will be spoken words or written presented text. On the other hand, the visual tools will Page 3 vary between pictures, diagrams and charts. This teaching plan is intended for introducing computer architecture course ACCESS/5200 at University of Colorado at Colorado Spring. The laconic teaching goals for this lesson are: 0 0 0 0 Student defines computer architecture. Student recognizes the role of the technology trends in computer architecture. Student distinguishes between computer architecture and instruction set architecture. Student lists two types of parallelism.And it will be organized as the following: 1. Prerequisite classes. 2. A foreword. 3. Computer architecture definition. 4. Computer architecture intersection. 5. Computer architecture classifications. 6. Why does it matter? 7. Course content. 8. Conclusion. 1 . Prerequisite classes Dependency or process diagram is going to be utilized to show the computer organization prerequisite classes. Computer organization 2. A foreword. Computers have different ways of how we see them. Computer Architecture Personal Mobile devices Desktop Computing Servers Clusters/ warehouseman computers Embedded computersEach of these unlike computers has its own characteristics, requirement, and computing technologies. However, they all have a t least a processor, memory, 1/0 device, and a way to communicate between them. Another way to see computers is this picture. Page 4 Applications System software Hardware SIS SIS in this picture is abbreviation of instruction set architecture, the boundaries between the hardware and the software. 3. Computer architecture definition: So, what is computer architecture? What do the computer architects do? The definition will be driven from the presented pictures above. Computer architects design imputer systems.Hence, it is not equal to designing SIS any more (old definition) SIS is actually a part of computer architecture. The word architecture nowadays covers all three aspects of computer design – instruction set architecture, organization or macrostructure, and hardware [8]. Computer architecture has been defined as designing the organization and hardware of the computer to meet goals and Measurement and Analysis Design Requirements and Castrations functional requirements [8] (figure: 1). 4. Computer architecture intersection: SIS Compiler Logical design Computer architecture is not a stand-alone subject.In order to obtain better computer design, it calls for familiarities with several topics like What do the computer architects do? Figure 1 : compiler, history of computers, and operating systems (figure: 2). A useful suggested tool to visualize the above Computer Architecture prop languages SO Computer history Figure 2: computer architecture interaction http://loving. Host. Sky/attendant/Operating-System-Extended-Machine. HTML Page 5 content would be Venn diagram. 5. Computer architecture classification: The most popular known classification of the computer architecture is Flan's taxonomy.It insiders only the computer processor of the designed computer system. The memory, interconnections, 1/0 devises aren't involved in Flan's taxonomy. The processor receive two kinds of information flow whether data or instruction. According to Flan's taxonomy, both o f the instruction or data streams can be single or multiple. Architecture categories Flan's Taxonomy SITS SIMD MID MISS Another architecture classification is based on the type of parallelism that is exploited in the designed computer system. Tow type of parallelism at the computer application Parallel architecture Data level parallelismTask level parallelism level: data level parallelism and task level parallelism 6. Why does it matter? Architects design architecture for a given technology. Technology parameters quickly change over time. So, it is important to trace the technology trends and plan for it as architects (figure: 3). Parameter Time Page 6 Figure 3: Technology trends Technology: Integrated circuit technology DRAM, Flash Magnetic disk technology Bandwidth and Latency Transistors and Wires Power and Energy: Thermal Design Power (TIP) Dynamic Energy and Power Static power consumption Cost: DRAM pence Microprocessors price Integrated Circuit Cost 7.Course topics: Computer a rchitecture Quantitative approach [8] is a popular book for teaching computer architecture class in many universities, University of Colorado at Colorado Springs as well. So, I am going to adopt the content of this book to introduce the computer architecture topics. Here is a dependency diagram to present the course topics and the book chapters at the same time in relational manner to give the student a glance of how the topics are structured. Also, it can be extended by building up new dependency relations between the chapters as the instructor start to explain them later on the course.This method is to facilitate the learning according to How People Learn book [6] point number one. Chap: 1 Fundamentals of Quantitative Design and Analysis Chap: 2 Memory hierarchy design Chap: 3 instruction-Level Parallelism Chap: 4 Data-Level Parallelism Appendix B Appendix C Chap: 5 Multiprocessors and Threadlike Parallelism page 7 Chap: 6 The Warehouse-Scale Computer 8. Close the talk by summariz ing the information. In conclusion, the computer architecture is to design the organization and the hardware of the computer to meet its functional requirements and intended goals.To do that best, architects asked for taking the technology trends in its consideration to lengthen the life of the designed architects and for taking advantages of parallelism in order to make it scalable and efficient. Measurement and Analysis Indeed, Just one thing needs to change in the teaching plan to engage both visual and verbal learning styles- change the way to present information, provide visual aids in addition to verbal ones. Evaluation: In this section, I am going to suggest an evaluating procedure consist of two parts: satisfaction evaluation and outcome evaluation.First, to assess the satisfaction of this Lana, instructor can look to the learning style for each student in the class using one of the learning styles inventory test that are provided online like: http:// www. Learning-storyline . Com/inventory/questions. PH? Cockiest=y or http:// Then, count the percentage of students that has visual learning style, aural learning style, and other styles. After that, calculate the how much of the students learning styles are covered by this plan design, sum visual and verbal students.Finally, count the parentage of students learning styles that this plan considered to evaluate the degree of satisfaction. Second, in a teaching and learning, the most actual evaluation is that which on the basis of students learning outcomes. So, to measure this plan outcome, instructor can use either way quantitative or qualitative approach like: asking some direct questions to Page 8 students to examine their understanding; print out an assessment examination and give it to each student (figure: 4); asking all the students if they have any questions about the lecture.I recommend the simplest evaluating methodology like the method suggested in [9],†instructors should avoid questions or situations that could make it wizard for students to respond (â€Å"Who is lost? â€Å") or are so generic as to lead to nonresidents (â€Å"Are there any questions? â€Å"). Instead, instructors should pose questions that encourage more specific responses, (e. G. , â€Å"How many of you understand what we are talking about? â€Å"). † Name: ? What is computer architecture? Name: From 1 to 10: How much important is this course?How much you think you can learn this course? As (high – medium – low): How much important is this course? How much you think you can learn this course? Figure 4: example of printed students' assessment Discussion: In USC computer architecture class, while implementing the presented approach, I notice a further unintended advantage. The main goal for this plan was to match the learning style for the visual and verbal learners. But I discovered that it has advantages even if the learning style doesn't match the student like the case o f international students.Indeed, this plan improves the learning for the verbal learners who are taught by a different language from what they are natively speak. There was almost 15% of the students in the ACCESS at USC are international students. This approach can contribute to solve the learning difficulties that the international students face. Assuming that the international students misunderstand 5% to 35% from the spoken language in the lecture, due to the lack of their English vocabularies and synonyms that they are familiar with, the percentage expected to decrease when the instructor uses visual tools in their teaching.Consequently, the progress is accomplished by reducing the misunderstanding percentage of the international students. Observing the visualization tools in this teaching plan, it was suitable for the context that they have been exploited in. One of the efficient teaching visualization tools to computer architecture course is simulators [10], it hasn't used in this suggested plan because it had addressed introducing the course but it still can be used later on the lectures.It helps explaining the main concepts in the course such as CPU [1 1], SIS, or cache memory. Page 9 Even if the computer architecture topics expand, this suggested plan will still be applicable and it will not needs significant changes. Conclusion: In conclusion, the main effort in this paper was a contribution to utilize delivering the computer architecture content to the students. I have used a teaching method that focuses on students' learning style and I have designed a constructible teaching plan.In my suggested designed teaching plan for the first day of computer architecture class, I have chosen two basic learning styles of student, visual and verbal learning styles. Then, I propose a way to evaluate the success of it. In my discussion, I discussed several points; I highlighted a benefit for this approach for international students as well; mentioned visualizati on tools are useful and recommended additional one that haven't used but can be used later in the course, simulations is useful for chemotherapeutics. Bibliography [1] E. J. Barbara, H.. B.

Jack in ‘Lord of the Flies’ and Heathcliff in ‘Wuthering Heights’ Essay

A comparative study of jack in ‘Lord of the Flies’ and Heathcliff in ‘Wuthering Heights’ and the conflict they represent between ‘civilised’ and ‘savage’ behaviour. In this essay I will be focusing on the two different novels, ‘Lord of the Flies’ by William Golding and ‘Wuthering Heights’ by Emily Brà ¯Ã‚ ¿Ã‚ ½nte. I will concentrate on Jack in ‘Lord of the Flies’ and his constant conflict over leadership on the island, and Heathcliff in ‘Wuthering Heights’ and his conflict with Edgar Linton regarding Catherine Earnshaw. I will show how the two authors use different procedures to express the emotional and behavioural differences between savage and civilised behaviour. The two novels are very different in the way in which narration, viewpoint, language and the detail of the description is used. Much of ‘Wuthering Heights’ is a long flash back told by Nellie Dean, the former housekeeper to Mr Lockwood a tenant at Thrushcross grange. The text is extremely descriptive but also consists of Nellie Dean’s opinions and memories along with a few extracts form Catherine Earnshaw’s diary. The novel contains more traditional language ‘They both promised†¦ to grow up rude as savages, the young master being entirely negligent how they behaved and what they did so they kept clear of him. ‘ Throughout the novel there is little speech used. When speech is used it consists of a variety of dialects, Standard English is used in conversations/comments by most of the characters. With Joseph being the acception and speaking Scottish, ‘Maister, coom Hither! Miss Cathy’s riven Th’ back off Th’ Helmeth uh Salvation un’ Heathcliff’s pawsed his fit intuh t’ first part uh T’ Broadway to destruction!’ This adds a bit of variety to the novel as it shows how different people from different parts of the country react to events. ‘Lord of the Flies’ uses more modern English ‘Piggy said nothing but nodded, solemnly. They continued to sit, gazing with impaired sight at the chief’s seat and the glittering lagoon.’ The story is narrated using an omniscient narrator, meaning we can see into the characters minds and so giving us a more detailed read. The characters are described more in depth and the surroundings i.e. the island. More adjectives are used in the description and this gives the reader more of a feeling of being there. The island is almost seen as a character rather than just a setting because of the amount of description used; ‘the sandy edge of the pool loomed up like a hillside. The water was warmer than his blood.’ Heathcliff is one of the main characters in ‘Wuthering Heights.’ On his arrival all apart from Mr Earnshaw, who had brought him back home with him, instantly disliked him. Cathy and Hindley refused for him to sleep in their room and when they learned that their presents, which their father had brought back for them, were broken and lost Cathy responded by ‘Grinning and spitting at the stupid little thing.’ Mrs Earnshaw wasn’t impressed either and scolded her husband and enquired ‘How he could fashion to bring that gipsy brat into the house and if he were mad?’ When he was first shown to the household he was described as ‘dirty, ragged and had black hair, he was big enough to both walk and talk.’ When he spoke for the first time he ‘repeated over and over some gibberish that nobody could understand.’ All this suggests that maybe he was from a foreign land. Nobody knows his origin as he was picked from the streets but his description suggests he is foreign; ‘you’re a prince in disguise. Who knows but your father was emperor of China and your mother an Indian Queen.’ This is a comment made by Nellie Dean later in the story. However a few days after his arrival Heathcliff and Cathy become ‘very thick’ and eventually Nellie Dean warmed to him. Hatred between Hindley and Heathcliff remained, this was mainly due to Hindley’s jealousness of the way in which his father treated Heathcliff i.e. much better than how Hindley was treated. Jack is one of the main characters in ‘Lord of the Flies.’ His background is unknown but is most probably similar to the other boys from the island, meaning he lived with his parents, he may have been sent away to school. First impressions of Jack were that ‘He was tall, thin and bony: and his hair was red beneath the black gap. His face was crumpled and freckled, and ugly without silliness. Out of his face stared two light blue eyes’ he was bossy and in charge of the choir ‘He shouted at them â€Å"choir! Stand still.†Ã¢â‚¬Ëœ He makes himself appear confident; ‘Merridew turned to Ralph, â€Å"Aren’t there any grown-ups?† â€Å"No† Merridew sat down on a trunk and looked round the circle. â€Å"Then we’ll have to look after ourselves.†Ã¢â‚¬  Jack also proved himself to be arrogant by responding ‘I ought to be chief’ when a decision was made that a chief was required to decide things. Instantly he and Ralph didn’t get on, this was mainly jealousy on Jack’s behalf as Ralph was chosen as chief. Those surrounding them almost immediately dislike both Heathcliff and Jack. They also both gain an enemy, which they have, constant conflicts with throughout the novel. This being Jack and Ralph; Heathcliff and Hindley, and they both have unknown backgrounds; however Jack’s is slightly more certain. So in many respects the boys are similar. However there are differences between the two, the main one being appearance and initially Heathcliff appears not to be bossy, later in the novel though he becomes sly and blackmails to get what he wants. Heathcliff’s appearance deteriorates as his behaviour becomes more rebellious and wild. His looks become less civilised and turn more ‘savage’ and unkempt ‘You wash your dirty face and brush your hair.’ This is reflected in his behaviour which has become much more raw ‘took my dingy volume by the scroop, and hurled it into the dog kennel vowing I hated a good book, Heathcliff kicked his to the same place.’ This shows how the savage behaviour of Catherine and Heathcliff has changed the surroundings by pulling other civilised things; such as the bible to be more like them. Heathcliff’s attitude towards Hindley becomes increasingly more rebellious. He encourages Hindley to throw things and be nasty to him so that he can use previously received beatings against him and get Hindley into trouble with Mr Earnshaw; ‘† Off, dog!† cried Hindley, threatening him with an iron weight used for weighing potatoes and hay. â€Å"Throw it† he replied, standing still, â€Å"and then I shall tell how you boasted that you would turn me out of doors as soon as he died and see whether he will not turn you out directly.† This shows Heathcliff’s sly side and hatred, so much hatred he feels that he needs Hindley to be gone completely from his life, this emphasises his savage uncivilised behaviour. As Jack’s behaviour becomes more savage his appearance changes his hair becomes longer ‘His sandy hair, considerably longer than it had been when they dropped in, was lighter now,’ and he uses war paints; ‘Jack planned his new face. He made one cheek and one eye socket white, then he rubbed red over the other half of his face and slashed a black bar of charcoal across from right ear to left jaw.’ He uses these war paints to become ‘masked’ in evil and malice, he creates a new world and cuts out responsibilities. Like this he is able to cut himself off from the civilised world and transform to show his true personality, unruly and ‘savage’. The conch in the book is something that is respected by all and represents law and order. To Jack the conch is like an adult and has the power that he wants, he wants to be in charge and be respected by all. Due to this there is great disruptions on the island. Both Jack and Heathcliff’s appearance deteriorates as their behaviour becomes more savage, again showing a similarity between the two. Heathcliff’s nature becomes increasingly more violent. The violence he uses is not physical, its verbal i.e. he makes threats and suggestive comments ‘it is some devil that urges me to thwart my own schemes by killing him.’ This suggests that Hindley is testing Heathcliff’s violent physical behaviour boundary and he may in fact of pushed him so far that it gets broken. This is not the only time in which we see a different side to Heathcliff, it is in fact one of many but the above may be the most severe. During Heathcliff and Hindley’s argument about the colts another side of Heathcliff is seen. He blackmails Hindley by threatening to tell Mr Earnshaw of the beatings he has received from him; ‘I shall tell your father of the three thrashings you’ve given me this week.’ This is a very devious manipulative move because he knows that Mr Earnshaw prefers him to Hindley and so therefore is likely to defend his ‘gift of god’ Heathcliff. Jack’s nature is violent, and the amount of violence increases as you proceed through the book. He shows how he is angry and short tempered especially at the start and specifically towards piggy; he uses harsh words towards him ‘shut up, fatty’, which are unnecessary. He continues to behave violently towards piggy ‘†Here – let me go!† His voice rose to a shriek of terror as Jack snatched the glasses off his face.’ Jack quite simply didn’t ask piggy for the use of his glasses and instead showed rudeness, ill mannered and violent behaviour by snatching them. It is also shown how Jack’s physical violence is initially kept pent up inside him but eventually releases itself onto piggy ‘This from piggy and wails of agreement from some of the hunters drove Jack to violence. The bolting look came into his blue eyes. He took a step and able at last to hit someone stuck his fist into piggy’s stomach.’ This again shows his dislike for piggy and shows how uncivilised and savage he in fact is. Both Jack and Heathcliff act violently but they release their aggression differently, Heathcliff tends to be clever with the way in which he acts and bribes, although he suggests that he could indeed handle releasing his aggression physically he doesn’t he sticks to what he knows best and shows a more mature attitude towards it. Jack on the other hand shows a more immature way of handling it; he uses both physical and verbal violence. The way in which he uses his words to try and harm others is different, and entails no maturity at all, he uses more childish thoughtless words, he may well use physical violence because he realises that his immature way of handling words is not making much of an effect. Heathcliff’s aggression becomes focused on Edgar Linton; this is because Heathcliff is jealous of the relationship Edgar has with Catherine. To show Heathcliff’s wildness and to develop the civilisation versus savagery theme Brà ¯Ã‚ ¿Ã‚ ½nte uses a different kind of language, a more intense harsh range of vocabulary. She uses words such as ‘with frightful vehemence’ to prove that Heathcliff feels really deeply and means what he says, she shows him to be impatient, agitated and angry; ‘stamping his foot and groaning in a sudden paroxysm.’ This is another example of Heathcliff’s aggression being focused on Edgar Linton; ‘†Cathy, this lamb of yours threatens like a bull!† he said. â€Å"It is in danger of splitting its skull against my knuckles. By god, Mr Linton, I’m mortally sorry that you are not worth knocking down!’ it shows his wildness and tells how Edgar is in for a beating. It all shows his savage behaviour and focused hatred on Edgar. Later in ‘Lord of the Flies’ Jack’s aggression becomes focussed on Ralph. This is a change as originally Jack’s violent, savage behaviour was directed at piggy. Their conflict over leadership and the type of society they should have on the island has great effects on the group as a whole and the boys take sides. Originally Jack was jealous of Ralph as he became leader and this was what Jack wanted to be, he was ‘mortified’ when Ralph was chosen as chief and this proved he was respected more and more popular than Jack. However, constant disagreements between the two meant that the group split and more sided with Jack meaning that he was now in charge. Jack was insecure and thought all would return to Ralph, whilst he controlled all he showed the most savage behaviour and made his ‘tribe’ hunt Ralph down and kill him. ‘†Heave! Heave! Heave!† a shrill prolonged cheer. Something boomed up on the red rock, and then the earth jumped and began to shake steadily while the noise as steadily increased. Ralph was shot into the air, thrown down, and dashed against branches. At his right hand and only a few feet away, the whole thicket bent and the roots screamed as they came out of the earth together.’ This was Jack’s attempt at killing Ralph, it emphasises his savage, uncivilised behaviour. Golding’s description of the roots is also a description of what would of happened to Ralph had he been in the way. Both boys show jealousy and the pent up aggression they receive from this they then focus on one person in particular. This is the person, which they feel most in ‘danger’ of, which threatens them the most. Again showing how similar the boys are. Heathcliff’s nature proves to be evil. This is shown by his bribery over the colts with Hindley; ‘You must exchange horses with me; I don’t like mine and if you wont I shall tell your father of the three thrashings you’ve given me this week, and show him my arm which is black to the shoulder.’ This shows just how far he would go to get his own way. He is constantly evil and constantly thinks like this, and when he throws the hot apple sauce at Edgar Linton this just emphasises the fact; ‘He seized a tureen of hot apple sauce, the first thing that came under his grip and dashed it full against the speakers face and neck.’ Brà ¯Ã‚ ¿Ã‚ ½nte suggests that Heathcliff could be from the devil by selecting words such as ‘imp of Satan’ to emphasise this. This is backed up by the fact that his background is unknown. His innate evil is being brought out because of his surroundings. Jack leads the hunters. On one hunt jack found himself unable to kill the pig they had captured. This is why he was so excited when the group caught another pig and managed this time to kill it; ‘†Look! We’ve killed a pig – we stole upon them – we got in a circle.† Voices broke from the hunters. â€Å"We got in a circle†¦Ã¢â‚¬  â€Å"We crept up†¦Ã¢â‚¬  â€Å"The pig squealed†¦Ã¢â‚¬  Jack then puts the pig’s head on a stick – the Lord of the Flies. By doing this he shows savage, evil and uncivilised behaviour. This is because in making the pigs head the Lord of the Flies he is making an idol of it; this is against one of the Ten Commandments. Christianity is seen as civilisation and so he is in fact going against it and therefore being uncivilised. He shows evil because by idolising the pig he is showing that he is proud of the fact that he has killed another living thing. Golding is saying that children do in fact have evil instincts inside which are brought out when they are in groups; this may be because they are trying to impress others. Both boys show evil behaviour, although Heathcliff’s you seem to be able to understand more as he has a reason and is more of a reaction to probing from others than anything else. Jack’s is a much deeper evil and he idolises the ‘darker side’ of life. Heathcliff’s relationship with the natural world is very strong. His look is that of rugged and dirty ‘If you wash your face and brush your hair it will be all right. But you are so dirty!’ and therefore fits in with nature because that too is rugged and dirty. At the start when he firsts arrives at the family home he speaks gibberish; ‘when it was set on its feet, it only stared round, and repeated over and over again some gibberish that nobody could understand.’ This emphasises the fact that he is not civilised, the same as nature isn’t and therefore implying again that Heathcliff fits in with and is part of nature. Catherine Earnshaw describes him as ‘a bleak, hilly, coal country.’ This emphasises how close to nature he is as this is how his closest friends describe him. The ‘bleak, hilly’ description also suggests that maybe he has little going for him and that his future is not a lot to look forward to. Whenever Heathcliff runs away he runs to the moors suggesting that this is where he feels most comfortable and sees nature as a friend to himself. After Heathcliff has runaway after hearing how Catherine plans to marry Edgar there is a storm. During the storm a tree is split; ‘split a tree off’ this tree symbolises Heathcliff and shows him splitting with Catherine and civilisation. It again shows how he is close to nature because natural things are being used to describe him. His name ‘Heathcliff’ is a natural name and is an oxymoron. It shows a contrast; ‘heath describes a wide-open space where as ‘cliff’ describes a cut off vertical edge. Golding connects jack to the natural world. He uses words such as ‘the forest and he were very still’ to emphasise the fact that the two are very similar. However the connection is more of a link than a relationship. Jack uses the natural world for exploring and hunting and it appears that he knows much about it and is very much in tune with it; ‘Jack seemed to know the way’ suggesting that he has hunted and explored a lot before. This may be because it is with the natural world that he feels comfortable and safe and the fact that when he is annoyed he walks off when Ralph is chosen as chief emphasises this. ‘If I blow the conch and they don’t come back; then we’ve had it.’ It shows that Jack feels capable enough to lead the hunters away from the large group and still be safe. Both Heathcliff and Jack are very close to nature but Jack uses his more to help him where as Heathcliff uses his connection as a friend and to help him to calm down and forget his troubles. Heathcliff inspires very strong emotions in people of love and hate. This gives positive and negative sides to his character. His feelings tend to lead to insecurity, jealousy, savage and uncivilised behaviour. Hindley and Edgar Linton epically feel hate towards Heathcliff. This is sparked off by the fact that they cant except him into their civilised world because he’s from a different background. As well as the fact that Mr Earnshaw brought back Heathcliff as another son and so Hindley saw him as an intruder, and was extremely jealous of the way in which his father treated him. Heathcliff was brought into extremely unfortunate circumstances. However he does have positive sides; the fact that he cares for others so much that he would change for them, and the fact that when he is angry he does not always release it on others but in fact will runaway to the moors to calm down; ‘he had listened till he heard Catherine say it would degrade her to marry him, and then he stayed no farther.’ Catherine, Nelly and Mr Earnshaw all loved Heathcliff greatly and this also suggests that in fact he must have good sides to him or else’s they would not have loved him so, much. Jack also inspires strong emotions, however they are different from those of Heathcliff. Jack inspires fear and admiration. Admiration must be one of the biggest as Ralph admires him and they normally fight, argue and show constant dislike towards each other. Golding allows jack to apologise to piggy after stealing his glasses this raises admiration form the reader as well as other characters in the book. Jack is intimidating, this makes him feel like he has power over others which is what he wants; however this makes people dislike him, but they continue to follow him because they fear him; ‘†who wants Jack for chief?† with dreary obedience the choir raised their hands.’ ‘Dreary’ emphasises the fact that the choir dislike Jack and don’t want to vote for him but do so because they fear him. Both boys shower others with strong emotions. Jack creates mainly negative feelings, or gains positive feedback from others after having previously doing something negative and then correcting it. Heathcliff creates equal positive and negative feelings. In writing this essay I have noticed many similarities in Heathcliff and Jack despite the very different context of the novels. I prefer Golding’s style of writing as it gives a better description of the characters and the surroundings and more in sight into the story. However as the characters I prefer Heathcliff to Jack as the way in which he acts and responds to events are more understandable whereas Jack is full of evil.

Free Essays on Edgar Allen Poe, Life and Anylisis of His Work

Many authors have made great contributions to the world of literature. Mark Twain introduced Americans to life on the Mississippi. Thomas Hardy wrote on his pessimistic views of the Victorian Age. Another author that influenced literature is Edgar Allan Poe. Poe is known as the father of the American short story and father of the detective story. To understand the literary contributions of Edgar Allan Poe, one must look at his early life, his literary life, and a summary of two of his famous works. "Edgar Allan Poe was born in Boston'' (Inglis 505) "on January 19, 1809'' (Asselineau 409). He was born to a southern family that were in a traveling company of actors (Inglis 505). His father, David Poe, was from a Baltimore family. He was an actor by profession and a heavy drinker. Soon after Edgar Allan Poe was born, he left his family. Poe's mother, Elizabeth Arnold Poe, was a widow at the age of eighteen. Two years after his birth, she died of tuberculosis (Asselineau 409). When his mother died, Poe was adopted by John Allan (Perry XI) at the urging of Mr. Allan's wife. In 1815, John Allan moved his family to England. While there, Poe was sent to private schools (Asselineau 410). In the spring of 1826, Poe entered the University of Virginia. There he studied Spanish, French, Italian, and Latin. He had an excellent scholastic record. He got into difficulties almost at once. Mr. Allan did not provide him with the money to pay for his fees and other necessities. Poe was confused and homesick. He learned to play cards and started drinking. Soon he was in debt in excess of two thousand dollars. Poe discovered that he could not depend upon Allan for financial support. His foster father refused to pay his debts, and Poe had to withdraw from the University (Asselineau 410). In May of 1827, Poe enlisted in the army as a common soldier. He did this under the name of Edgar A. Perry. He was stationed on Sullivan's Island in Charleston Ha... Free Essays on Edgar Allen Poe, Life and Anylisis of His Work Free Essays on Edgar Allen Poe, Life and Anylisis of His Work Many authors have made great contributions to the world of literature. Mark Twain introduced Americans to life on the Mississippi. Thomas Hardy wrote on his pessimistic views of the Victorian Age. Another author that influenced literature is Edgar Allan Poe. Poe is known as the father of the American short story and father of the detective story. To understand the literary contributions of Edgar Allan Poe, one must look at his early life, his literary life, and a summary of two of his famous works. "Edgar Allan Poe was born in Boston'' (Inglis 505) "on January 19, 1809'' (Asselineau 409). He was born to a southern family that were in a traveling company of actors (Inglis 505). His father, David Poe, was from a Baltimore family. He was an actor by profession and a heavy drinker. Soon after Edgar Allan Poe was born, he left his family. Poe's mother, Elizabeth Arnold Poe, was a widow at the age of eighteen. Two years after his birth, she died of tuberculosis (Asselineau 409). When his mother died, Poe was adopted by John Allan (Perry XI) at the urging of Mr. Allan's wife. In 1815, John Allan moved his family to England. While there, Poe was sent to private schools (Asselineau 410). In the spring of 1826, Poe entered the University of Virginia. There he studied Spanish, French, Italian, and Latin. He had an excellent scholastic record. He got into difficulties almost at once. Mr. Allan did not provide him with the money to pay for his fees and other necessities. Poe was confused and homesick. He learned to play cards and started drinking. Soon he was in debt in excess of two thousand dollars. Poe discovered that he could not depend upon Allan for financial support. His foster father refused to pay his debts, and Poe had to withdraw from the University (Asselineau 410). In May of 1827, Poe enlisted in the army as a common soldier. He did this under the name of Edgar A. Perry. He was stationed on Sullivan's Island in Charleston Ha...