Adaptive E-commerce system Literature review Example | Topics and Well Written Essays - 5000 words

Adaptive E-commerce system - Literature review Example Most of these differences arise with differing framework of what e-commerce constitutes. For example quote (year) looked at e-commerce from the perspective of buying and selling and stated that e-commerce covers all industries where the processes of buying and selling is performed over electronic systems. Quote (year) on the other hand viewed e-commerce from the perspective of what is done with a company’s website. To this end, all activities that promoted the regulation of business, whether it involved selling and buying or not formed e-commerce. Examples of such activities were named to include optimization of traffic from search engines, generation of sales and interaction with customers through an online platform. Regardless of the differences in framework for defining e-commerce however, there is one thing that runs through and that is the fact that some level of business that takes place over an electronic medium. As part of the purpose of the study, the literature review is being conducted as a major secondary data collection exercise that will be used to collect data to address the specific objectives. From the background of the study, it would be noted that there is great regard for adaptive e-commerce. This means that the researcher shall approach the literature from a perspective that limits the scope of review to adaptive e-commerce system. This is because of the position held by the researcher that even though e-commerce as a generalised concept of modern business has the potential of opening great doors for companies, there is the need to optimise the outputs of e-commerce. By optimisation, reference is being made to any creative process that ensures that service users are able to have an advantage on the use of e-commerce over their competitors. Meanwhile, quote (year) made claim to the effect that with the competitiveness of the modern global

To what extent can the post-war boom be attributed to Keynesianism Essay - 1

To what extent can the post-war boom be attributed to Keynesianism - Essay Example The ideas included in Keynes’s famous book, ‘The General Theory of Employment, Interest and Money, which published at 1936’ (Arnold 2008, p.226) are presented for showing the key elements of Keynesianism. Other ideas proposed by Keynes in regard to markets and economics are also used in order to respond to the following question: Has Keynesianism influenced the post-war boom and at what level? It is proved that Keynesianism has highly contributed in the development of the post-war boom but the involvement of the above framework in this phenomenon has not been direct, in the context described below. 2. The method of Keynes The understanding of the role of Keynesianism in the post-war boom requires the explanation of the key aspects of the specific economic framework. In general, Keynesianism is based on the idea that ‘aggregate demand is influenced by a series of decisions, both public and private’ (Davies and Green 2010, p.27). Public decisions seem t o be more powerful in influencing aggregate demand, compared to private decisions (Davies and Green 2010). Public decisions are those involved in a country’s ‘monetary or fiscal policy’ (Davies and Green 2010, p.27), as this policy is designed and implemented by the local government. It should be noted that in the context of Keynesianism ‘changes on aggregate demand are not always anticipated’ (Davies and Green 2010, p.27). Another characteristic of Keynesianism is the following one: for Keynesianism the changes on demand are often revealed with delay (Davies and Green 2010). In this way, there is no time for aligning wages with the actual level of demand, a fact that results to unexpected increase or decrease of labor (Davies and Green 2010). In other words, even if the vulnerability of aggregate demand towards public and private decisions is known, the measures taken by governments for securing a balance between demand and prices, including wages, are often ineffective (Davies and Green 2010, p.27). This means that Keynesianism offers the basis for the explanation of markets’ trends but it cannot provide a strategy for limiting markets’ exposure to changes. Another important element of Keynesianism is the relationship between consumption and income (Arnold 2008, p.226). The above relationship is likely to have three modes: a) the level of disposable income is a criterion influencing the level of consumption; b) as the disposable income increases so does the consumption and vice versa and c) any change on disposable income is followed by changes on consumption (Arnold 2008, p.226). Kadish (2010) focused on the view of Keynes in regard to market controversies. According to Kadish (2010), Kaynes considered these controversies had been resulted mostly because of communication failures and did not reflect the actual status of the economy (Kadish 2010). As a result, three different approaches would be appropriate for resolving problems related to the performance of markets: a) the positive; this approach would focus on the actual status of a market, b) the normative; this approach reflect the status that a market could have and c) the practical; this approach focuses on the tools that would be used for reaching a solution (Kadish 2010, p.118). In general, Keynesianism can be considered as related both to ‘classical macro-economics and effective demand’

The Kelvin equation

The Kelvin equation The Kelvin equation relates the vapour pressure of a liquid to the effect of surface curvature i.e. a meniscus with radius. The equation illustrates that due to the surface tension and the surface being larger than the volume, there is much higher evaporation rate for smaller droplet liquids when compared to that of larger droplets. ln(P/P0 ) = 2?Vm /rRT The Kelvin equation also shows that smaller particles exhibits higher solubility than larger particles. This occurs because of much greater pressure inside the droplet than outside and therefore gas diffusion can occur across the plateau borders of the droplet, weakening the walls (from high to low pressure). The vapour pressure of that over the droplet of water of radius r and inside a bubble in water at a specific temperature could be calculated using the Kelvin equation below. KELVIN EQUATION PARAMETERS P: Actual vapour pressure P0: Saturated vapour pressure Surface tension of liquid MW: Molecular weight r: Radius Density R: Universal gas constant (8.314 J K-1 mol-1) T: Temperature in Kelvin The Kelvin equation has a variety of significant effects as it provides clarifications for such phenomena including supersaturation of vapours, superheating, Ostwald ripening and capillary condensation. This effect is known as Kelvin effect and also Gibbs-Kelvin effect or Gibbs-Thomson effect. (Barnes 2005) Supersaturation The effect on the Kelvin equation could be explained in terms of supersaturation of vapour. The term of supersaturation refers to the state in which a solution has overly dissolved material than that of a saturated solution. Supersaturation could also be referred to the compounds vapour having greater partial pressure than that of the vapour pressure of the compound. In the solid form, the small particles can lead to crystallites or large single crystals formation. In a polydisperse suspension the material will dissolve until it has reached its saturated level at that temperature. When the sample is stored, the temperature will fluctuate slightly regardless of storage location. For example, if the sample is stored in the fridge, the temperature could vary and so the temperature of suspension could increase leading to a rise in saturation level allowing smaller particles to further dissolve until a new saturation level is reached. When the temperature drops, the suspension is affected in terms of consisting more than usual of the dissolved species. The new concentration is described as supersaturation. The remaining dissolved species would precipitate back on all the particles, the smaller particles preferentially dissolve and so larger particles having a coat will enlarge. Hence, supersaturated solutions are a result because of alteration of the saturated solution, i.e. temperature, volume or pressure. Some examples of supersaturation are beer and carbonated water. Water is able to dissolve a lot of carbon dioxide than at atmospheric pressure, which happens at the elevated pressure in bottle. At the state of atmospheric pressure, the escape of the carbon dioxide gas from the supersaturated liquid is quite slow. This process is advanced by the existence of small bubbles which is caused by shaking the product. Rock candy Rock candy is a type of confectionery mineral composed of relatively large sugar crystals. The candy is formed by allowing a supersaturated solution of sugar and water to crystallize onto a surface suitable for crystal nucleation, such as a string or stick In the phenomenon of superheating, the homogeneous substance without boiling is heated at a temperature in which is greater than the liquids normal boiling point. In order for a vapour bubble to expand and consequently burst at the surface (to boil), the temperature heating must be highly sufficient (raised above the boiling point) that the vapour pressure will go beyond the atmospheric pressure. (Patrick 2006) An insufficient temperature that is below will cause the vapour bubble to decrease and so disappear. However, in terms of superheating, the liquid is seen that it does not boil despite having the vapour pressure exceeding the atmospheric pressure. As a result, the surface tension restrains the growth of the bubbles. Boiling chips which are also known as boiling stones or anti-bumping granules are purposely added to the liquid to make boiling easier without the liquid becoming superheated. They are small and insoluble porous stones composing of calcium carbonate or silicon carbide. Inside the stones, they have pores that allow cavities to trap air and supply spaces in which the solvent bubbles can develop (nucleation sites i.e. formation of the vapour bubbles in on cavities). When there is an addition of boiling chips to a solvent and is heated, it would release very small bubbles. These tiny bubbles prevent bumping, loss of solution and hence allows liquid to boil easier without being superheated. Without the addition of boiling chips in a solvent, the heated liquid could be defined as superheated, an unstable state and therefore would be able to release a quantity of bubble of gas all of a sudden or perhaps violently. As a consequence of the sudden expel of vapour from the container of the liquid, it could lead to from ruining of the experiment to causing harsh burns. Ostwald ripening In regards to droplets that are spherical and being in contact with their vapour, the two radii situated in the liquid phase are equal and so maintain positive signs. Therefore in reference to the Kelvin equation, the droplets vapour pressure will be higher than the same liquid with a flat surface. An example is that for a radius of water droplet of 10nm, the increase in vapour pressure is approximately 10%. The smaller the droplets radius, the greater the vapour pressure. (Barnes 2005) For instance, in the case a polydispersion system (droplets with different sizes), the smaller particles has the tendency to dissolve (i.e. have greater solubility) or evaporate attaching themselves onto the surface of the larger ones, leading the larger particles to continue to grow with time but the smaller particles disappearing. This spontaneous process known as Ostwald ripening was first recognised in 1896 by Wilhelm Ostwald. (Ostwald 1896) A real life effect of the Kelvin equation occurs in clouds in which the larger droplets grow expecting to be heavy enough to fall as rain. Similarly, this process also exists for crystals contained in solutions. The larger crystals will tend to grow rather than the smaller ones resulting in a process of Ostwald ripening. This process is an important ageing effect occurring in any polydisperse systems. It could be observed in foams, emulsions as well as aqueous sols. (Adamson 1990) In terms of foam instability, the reason of instability could be due to Ostwald ripening. The Ostwald ripenings driving force arises because of the variation of Laplace pressure between bubbles of unequal size that is the smaller and larger foam bubbles. (Barnes 2005) The smaller bubbles having a greater gas pressure than the larger bubbles causes an effect on the foam stability. For the period of foam storage, the bubbles rise in the gravity field to the top of the liquid due to the large density existing between the liquid and the gas phases. From here, they shape a loosely closed-packed or honeycomb like structure from which the liquid drains forming foam that turns out to be dryer. The thin films created can collapse due to gravity and causing coalescence of bubbles. When increased of gas solubility with pressure happens, gas between bubbles are able to diffuse from the smaller to the larger bubbles. A large bubble in the foam that is surrounded by smaller bubbles could ultimately cause a big hole in the structure of the foam. (Hubbard 2002) Ostwald ripening is the cause of foam instability when a larger pressure difference of foam bubbles that are spherical cam be seen. In the case of polyhedral foam (with planar liquid lamella), the foam bubbles pressure difference is not great and so foam instability is not because of the Ostwald process. (Tadros 2005) Since the surface of the bubble behaves like viscoelastic behaviour, the process of Ostwald ripening in foam bubbles could be reduced by addition of a gas that is only soluble in the liquid. As a result of this process, it also has an effect of decreasing of specific surface area in time due to the highly soluble particles. (Lyklema 2005) The Ostwald ripening is important as it is used to increase the efficiency in both industrial and analytical filtration. (Barnes 2005) Capillary Condensation The Kelvin effect can also be observed in terms of capillary condensation due to the existence of a curvature, a meniscus. Capillary condensation arises because of the vapours adsorption in a capillary which creates a liquid surface with tiny radius of curvature. (Fisher 2002) The liquids vapour pressure being lower than that of the same liquid with a flat surface is a consequence of the radii being positioned in the vapour phase. If the actual vapour pressure is greater than the vapour pressure calculated from using the Kelvin equation for the curved surface than condensation would likely to occur. The actual vapour pressure for a flat surface may possibly be lower than its saturation vapour pressure. (Patrick 2006) As the capillary filled by capillary condensation occurs, immediately a meniscus is generated (which depends on the liquids surface tension) at the liquid-vapour interface enabling the equilibrium to be under the Psat (saturation vapour pressure). At low vapour pressure, the liquid condenses in smaller radius of the capillary. As the vapour pressure increases, further condensation of the liquid at the larger radius capillary is filled causing the radius of the meniscus to increase (capillary becoming full). The Kelvin equation implies that the Pv/Psat rises inside a capillary and the meniscus radius will further expand causing a creation of more flat surface. Hence, the vapour condensation is able to occur smoothly over the range of vapour pressures. For any liquid-vapour interface involving a meniscus, the Kelvin equation therefore relates the change between the equilibrium vapour pressure and the saturation vapour pressure. Capillary condensation as an important factor, is significant by means in both naturally and synthetic occurring porous structures. These structures allow scientists to recognize the concept of capillary condensation to determine pore size distribution as well as surface area through adsorption isotherms. (Barnes, 2005) References Adamson, W 1990, Physical chemistry of surfaces, 5th edn, John Wiley Sons, Canada Barnes, G.T 2005, Interfacial science, Ist edn, Oxford University press, United States CUBoulder Organic Chemistry, 2007, Boiling Chips, viewed 28 March, 2010 Economic expert, 2010, Supersaturation, viewed 28 March, 2010 Farlex, 2010, Kelvin equation, the free encyclopedia viewed 25 March, 2010, Fisher, LR Israelachvili JN 2002, Colloid Interfacial science, 3rd edn, Elsevier LTD, United States Gordon, M 1988, Physical Chemistry, 5th edn, McGraw-Hill, United States Hiemenz, CP 1997, Principles of Colloid and Surface, 3rd edn, Marcel Dekker, United States Hubbard, T 2002, Encyclopedia of Surface and Colloid Science: Por Z, 2nd edn, Marcel Dekker, New York Lyklema, J 2005, Fundamentals of interface and colloid science, 2nd edn, Academic press, London, vol. 2, p. 24 Ostwald, W 1896. Lehrbuch der Allgemeinen Chemie, vol. 2, part 1. Leipzig, Germany. Sinko, PJ 2006, Martins physical pharmacy and pharmaceutical sciences, 5th edn, Lippincott Williams and Wilkins, Philadelphia Tadros, F.T 2005, Applied Surfactants: principles and application 4th edn, edn, Wiley-VCH, Germany. The engineering toolbox, 2005, Introduction to vapor and steam, viewed 28 March, 2010, UBC Chemistry Department, 2002, Boiling Chips, viewed 28 March, 2010 Uci education, 2005, Boiling point and distillation, RDG, viewed 28 March, 2010 https://eee.uci.edu/programs/hongchem/RDGbpdostill.pdf

KaleidoscopeArt Behind Closed Doors :: Free Essays Online

KaleidoscopeArt Behind Closed Doors Before you begin reading this paper, look through the appendix. Are you shocked? Disgusted? Intrigued? Viewers of such controversial artwork often experience a wide spectrum of reactions ranging from the petrified to the pleased. Questions may arise within the viewer regarding the artistic merit and legitimacy of this unorthodox artwork. However, art's primary purpose, according to Maya Angelou, â€Å"is to serve humanity. Art that does not increase our understanding of this particular journey or our ability to withstand this particular journey, which is life, is an exercise in futile indulgence† (Buchwalter 27). To expand on Angelou's analogy, because everyone experiences a different life journey, art is different to everyone. In other words, art is subjective to the viewer. The viewer creates his own definition of what is art and what is not art. Some may recognize the artistic value of a piece of artwork, while others may find it obscene. Some may pr aise the artwork, while others will protest it. Censorship is derived from these differing perspectives on artwork. Through censorship, communities seek to establish boundaries and criteria that limit an artist's ability to produce â€Å"proper† artwork. However, some artists choose to ignore these boundaries in order to expand the scope of art and, in their view, better serve humanity. At first glance, Western society appears to have changed significantly since the nineteenth-century. Today, industrialized nations enjoy more efficient transportation, communication, medical care, and manufacturing than they did in the nineteenth-century. But have our core values changed? While the Western world has changed considerably, people's opinions of the core values and morality is well-preserved since the nineteenth-century. This assertion becomes apparent when one compares the standards by which Western society judges what is considered artwork. While today's definition and criteria of censorship in a Western art museum is unchanged since the nineteenth-century, the act of censorship has changed with museums and their role in society. Societies often struggle to define censorship. Interestingly, the nineteenth-century did not explicitly define the word â€Å"censorship† as Westerners understand it today. The nineteenth-century's definition of censorship is â€Å"the office of a censor† and the definition of censor is â€Å"an officer of Rome who had the power of correcting manners† (Johnson 112).

Organizational Behavior and Its Impact on Society Essay

Formal organizations are typically understood to be systems of coordinated and controlled activities that arise when work is embedded in complex networks of technical relations and boundary-spanning exchanges. But in modern societies, formal organizational structures arise in highly institutional contexts. Organizations are driven to incorporate the practices and procedures defined by prevailing rationalized concepts of organizational work and institutionalized in society. Organizations that do so increase their legitimacy and their survival prospects, independent of the immediate efficacy of the acquired practices and procedures. There can develop a tension between on the one hand, the institutionalized products, services, techniques, policies, and programs that function as myths (and may be ceremonially adopted), and efficiency criteria on the other hand. To maintain ceremonial conformity, organizations that reflect institutional rules tend to buffer their formal structures from the uncertainties of the technical activities by developing a loose coupling between their formal structures and actual work activities. Organizations: Two Sociological Perspectives Much recent sociological work on the nature of organizations starts from the assumption that organizations are best studied and understood as parts of an environment. If organizations exist within a distinctive environment, then what aspects of that environment should be most closely examined? Sociologists have answered this question in two different ways: for some, the key features are the resources and information that may be used rationally within the organization or exchanged with other organizations within the environment; for others, the essential focus is on the cultural surround that determines and moderates the organization’s possible courses of action in ways that are more subtle, less deterministic than the resources information perspective suggests. While there are many exceptions, it is probably fair to say that the resources-information approach has been more often used in analyses of commercial organizations, and the latter, cultural approach used in studies of public and non-profit organizations.

Prometheus Essay

Johann wolfgang Von Goethe â€Å"Prometheus† 1. Prometheus is the speaker of this poem, and he is speaking to the god of the gods. 2. In the first stanza, a simile occurs, it says â€Å"And, like the boy who lops the thistles’ heads† This simile here was revealed by Prometheus and he was referring Zeus to an evil trickster young man. Furthermore, the purpose of this simile is to visualize the boy who is ripping off the heads of a beautiful flower, which is an evil action. However, The reason that Prometheus is referring Zeus to this evil young man is because he thinks that he is an innocent person and Zeus is abusing him. 3. In the second stanza, Prometheus explains the procedure to make all the Gods powerless. Prometheus, who is the speaker of the poem, suggests that Gods are not confident enough of their place and they feel weak. The Gods are nourishing their hunger by people’s worship, prayer, and their obedient towards him. However, the speaker also reveals that they are taking advantage of people who are in trouble, therefore people would rely on them. In conclusion, the Gods would not be as powerful without people’s prayer and worship. 4. The rhetorical questions in stanza five focuses on the God and their unique characteristic such as selfishness. Prometheus reveals their personality in a negative way. Prometheus says that Gods do not help people who are in trouble if they don’t get a reward from it. Also, he mentions that if a God feels pity on another God, the other Gods would try to avoid that God and treat him differently. In the last rhetorical question in the last sentence is towards the readers, exploring the reason why people would worship these kinds of Gods. The overall effect on this series is to convince people to stand on Prometheus’s side and avoid the Gods. 5. in the fifth stanza, there are two words which are personified. These words are time and fate. In the text, it says â€Å"time is omnipotent† which mean time is very powerful and have authority to rule and control over man. And another one is fate; it says â€Å"fate is eternal that never dies or ending† It emphasizes that fate is powerful as well as time. 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 6. Dreams was an image used in stanza six, was helping the reader to learn about the speaker. He says that even his dream or wish is not accomplished, he will not run away. He will follow his dream and not be defeated no matter what happens. 7. He says that he will create a human being who is just like him. So, the Gods would not get any prayer or worship from the people. Prometheus plans to destroy the gods using human beings. 8. The overall tone of this poem is anger and hate. Prometheus curse towards Gods and especially Zeus. Prometheus’s strong tone reveals his anger and feeling towards Zeus. Lord Byron (George Gordon Byron) â€Å"Prometheus† 1. There are two significant differences between both â€Å"Prometheus† poems. The poem from Von Goethe is written in Prometheus’s point of view and he was addressing it to Zeus. But, the other one is written in Lord Byron’s point of view. Where â€Å"Prometheus† is unidentified. In this poem, there is no direct evidence that we can find the speaker, but we could assume who it is addressing to, which Prometheus. In addition, the poem by Von Goethe is full of anger and hate towards Gods, However, the poem by Lord Byron is much more calm and has some love towards Prometheus 2. The rock, the vulture, and the pain. These three symbols are representing Prometheus’s punishment by Zeus. According to Prometheus’s myth, he is chained to the rock and he is getting tortured by the vulture which comes everyday and eats Prometheus’s river. The poem is saying Prometheus sacrificed himself to help human, which caused him to feel the pain that never ends. 3. â€Å"The suffocation sense of woe†¦ And then is jealous lest the sky should have a listener† Instantly, I could imagine how big this woe could be that it is enough to suffocate one, it doesn’t mean that woe itself suffocating physically. It means that the sense of woe is too concerning that it suffocating one mentally. Also, sky is personified and the image of Prometheus arises. This quote is saying Prometheus is suffering because of loneliness too. He has no company but the sky, to talk to. The loneliness causes him to have more pain. 4. These three words are creating an image of heaven and hell. The word â€Å"Fate† used to represent heaven and â€Å"Hate† represent hell. 5. Thunderer is Zeus. Zeus’s main symbol is lightening or thunder. 6. The speaker gives an image of Prometheus getting punished by Zeus and how much he is enduring the pain and the torture. The speaker also gives the reader an idea of the cruelty of Zeus. 7. â€Å"Man† defines a symbol referring to Prometheus. 8. I think Prometheus is a symbol for rebel, but also a reader. I agree with the speaker’s statement, because even Prometheus is one of gods, he loved human more than his own kind. Prometheus decided to disobey Zeus and helped human by stealing fire from god. By this event, human could have enough power to stand by themselves without asking for help to gods. 9. This statement is paradox, because usually death is not good thing, but it is good thing for Prometheus. Prometheus never gave up or regrets his choice even he is getting torture every day, so if he dies finally, he will not have any pain. Also, Lord Byron was Christian and he believed there is an afterlife. So, if Prometheus dies