Personal reflections Statement Example | Topics and Well Written Essays - 250 words

Reflections - Personal Statement Example y’s economic structures and patterns remain questionable since they provided a conducive enrolment for individuals to loot public funds, I will endeavour to implement technological financial and planning applications to ensure lucidity and accountability of the use of the public funds. On the representation of workers, I would opt leading from the front in the agitation of the workers’ rights. My success in addressing the issues of transparency and accountability can be assessed through the accomplishment of the internal technological controls, which ensures transparency and accountability consequently reduction of public funds. The group discussion on my view of the public service and workers seem to correlated except on the roles I will play in the future in the representing of the workers. The contrasting views on the role to take up in defending workers rights are influenced by the dynamism in leadership. In addition, the diverse personalities, which include, confidence, articulation of ideas and general perception of issues largely influence the position of different individuals on this

Internet and marketing strategy Essay Example | Topics and Well Written Essays - 5000 words

Internet and marketing strategy - Essay Example (Definition) It is also "referred to as online marketing or Emarketing, is the marketing of products or services over the Internet. The Internet has brought many unique benefits to marketing including low costs in distributing information and media to a global audience. The interactive nature of Internet marketing, both in terms of instant response, and in eliciting response, are unique qualities of the medium. Internet marketing ties together creative and technical aspects of the internet, including design, development, advertising and sales. Internet marketing methods include search engine marketing, display advertising, e-mail marketing, affiliate marketing, interactive advertising, blog marketing, and viral marketing. Internet marketing is the process of growing and promoting an organization using online media. Internet marketing does not simply mean 'building a website' or 'promoting a website'. Somewhere behind that website is a real organization with real goals. Meanwhile, at this juncture, there is need to focus on Internet Marketing Business Model. But however, what is Business Model in particular. "A Business Model Draws on a Multitude Business Subjects, including economic, entrepreneurship, finance, marketing, operation and strategy. The Business Model itself is important determinant of profits to be made from innovation (Role of the Business Model) Additionally, there are six components of Business Model, these are; Value preposition, Market Segment, Value Chain Structure, Revenue Generation and Margins, Position in Value and lastly Competitive Strategy. MARKETING STRATEGY It is well known fact that "An Internet Marketing Strategy is fast becoming an integral part of marketing and PR manager's 'hat.' Blogs, online press releases, media rooms, SEM, interactive elements, and rich media are aspects of the job every marketing and PR professional must get their wits around. An effective Internet Marketing Strategy is vital your business success today. What people see when they do a search does influence their perception of your company. It also affects your brand value.And now that the search engines have changed the way they display results with theintegration of news, blogs, and feeds and video into the web search results pages, there aremore PR opportunities in search than ever before". (On line PR Lessons of 2007) However, there are 10 most known Internet Marketing Strategy that should be adapted in order to make the E-Business effectively and successful indeed. They are as follows: 1. The E-marketing planning process: "The integration of e-marketing-specific objectives, strategies and activities into the traditional annual marketing planning process". (Top 10 Strategic E-Marketing Issue) 2. Organizing and resourcing for e-marketing: "As the importance of online channels increase, the structure of the marketing organization and responsibilities may need to change to maximize the opportunities available through new media". (Top 10 Strategic E-Marketing Issues) 3. Defining the Online value proposition (OVP :): "To achieve

Theories of Colour Vision

Theories of Colour Vision Kishan Lakhani How does colour vision work? It is difficult to imagine a world without colour perception as it is constantly in action by a whole spectrum of living organisms and for a range of purposes, it â€Å"not only allows us to detect objects that might otherwise be obscured by their surroundings; it also helps us to recognize and identify things we can see easily† (Goldstein, 2000, p.203), thus making it an essential component of vision. Colour dictates survival in many environments; the artic fox boasts a white pelt allowing effective camouflage over its prey and a significant factor in its ability to hunt (Sekuler Blake, 2006). I will explore the mechanisms that are said to explain colour vision at the photoreceptor level and beyond, but first of all we must understand what colour actually is. The electromagnetic spectrum ranges from cosmic rays to radio waves, as wavelength increases. Between UV and Infrared lies a strip, visible light, this is what we are interested in with regard to colour (Snowden et al., 2006). Colour arises when light rays from this visible spectrum (390nm-750nm) are reflected off objects and into our eyes. Differing wavelengths of light from this spectrum subsequently determine the colour perceived, as short wavelengths produce the colour violet (350nm), medium and long wavelengths produce green and red respectively. Sir Isaac Newton famously wrote â€Å"The rays to speak properly are not coloured. In them there is nothing else than a certain Power and Disposition to stir up a Sensation of this or that colour† (Sekuler Blake, 2006, p.236) So colour doesn’t really exist in the physical world at all, it is our own psychology that creates the concept of colour. Semi Zeki (1983) refined Newton’s words further saying that colour vis ion is a â€Å"property of the brain, not the world outside.†( Sekuler Blake, 2006, p.236) Hence we can sum up that colour vision lies in the eyes and brain – and not in the physics of light itself (Anderson 2012). So to answer the question ‘How does colour vision work’ we must explore the visual systems of the organisms further. Figure 1 The Electromagnetic spectrum (2012), Diagram showing the visible spectrum within the electromagnetic spectrum Photoreceptors are light sensitive cells found at the back of the eye in the retina. They contain visual pigments that absorb photons of light and convert this light energy into chemical energy, this process is called phototransduction. Within the pigment is a protein which determines the wavelength of light absorbed by the pigment and also a chromophore which is responsible for absorbing photons of light. (Wolfe et al., 2009) There are 2 types of photoreceptors, rods and cones. Cones are mainly concentrated in the fovea in the centre of the retina whereas Rods are completely absent in the fovea and more prevalent in the periphery of the retina (Snowdon et al,. 2006). Rods are adapted so they can operate in low light levels due to spatial pooling allowing scoptic vision, whilst sacrificing visual acuity. They contain just one pigment rhodopsin – denying colour vision due to the univariance principle. Cones however contain 3 photo pigments, which are sensitive to various wavele ngths of light and can therefore let us see colour. In comparison to the physical description of light, colour is much easier to describe as it is experienced psychologically not physically – such is the nature of light. It can be specified by just three values; hue, saturation and lightness.(Palmer, 1999) This is very important with reference to colour vision as it implies that many different lights will produce the same colour experience (Palmer, 1999). The three perceptual dimensions of colour can be summarised in what is known as the colour spindle. Hue is referred to as â€Å"the chromatic aspect of light† (Wolfe et al., 2009) and is dictated by its wavelength. Saturation corresponds purity and how vivid the colour is (Palmer 1999), and brightness involves the intensity of the colour (physically). The Young/Helmhotz trichromatic theory of colour vision works on the photoreceptor level, and ultimately was sprouted through the results of Helmhotz’s colour matching experiment. Observers were allowed to vary the intensities of 3 primary lights and mix them (in a comparison field) to match the colour of a single wavelength in a test field. They had to find a psychological match between the mixture of primary lights and the test light, simply by varying the intensities of the primary lights. This match is known as a metameric one, as the light in the comparison field is physically different yet psychologically identical to that in the test field. Results showed that by varying intensities in the comparison field, the observer could find a metameric match using just three primary lights. Dichromatic observers were unable to find matches for every colour in the test field. In summary, â€Å"with 3 primaries, you can get any combination of responses in the 3 cone types, so you can match the appearance of any test light.† (Anderson 2012) It is therefore clear to us that colour vision heavily relies on three different receptor mechanisms or cone photopigments, each with different spectral sensitivities (Goldstein, 2010). This is the basis of the trichromatic theory I will now elaborate on. Monochromats possess only one type of pigment in their cones. In this case, the ability to see colour is not possible. The same chain of events is initiated in the visual receptor despite there being a variety of wavelengths in the light absorbed by the pigment. The receptors response conveys information about how much light has been absorbed, but this response provides no information about the wavelength of this absorbed light. (Sekuler Blake, 2006) It is therefore impossible to discriminate wavelength when there is only one photopignment, which has uniform spectral sensitivity. The response could have altered due to a change in wavelength or light intensity, and monochromats are none the wiser – this is known as the principle of univariance. This situation is not unique to monochromats, as in low light levels rods are the only photoreceptors in action. They have one photopigment, rhodopsin resulting in the same dilemma. Consequently we â€Å"disregard the wavelength inform ation and see an image that appears in shades of grey† (Snowden et al., 2006) explaining why we can’t monochromats can’t see colour and why none of us have colour vision in low light levels. Dichromats possess two photopigments, which is very useful in terms of colour vision. The two pigment types have different absorption spectra, extracting some usable wavelength information about light (Sekuler Blake, 2006) It is now possible to separate and disentangle wavelength and intensity, allowing colour to be visible to a certain extent. Certain wavelengths are confused and constitute failures of discrimination (Sekuler Blake, 2006). A key reason that leads to the idea humans aren’t dichromats revolves around what is known as the neutral point. All dichromats possess this neutral point in which a single wavelength is always confused, and â€Å"the existence of a single neutral point is the hallmark of a two-pigment eye.† (Sekuler Blake, 2006, p.249) As humans do not show any traits of having the neutral point, there is a strong belief that humans have more than two cone photopigments. Trichromats hold three cone photopigments, enabling total discrimination of wavelengths throughout the visible spectrum. Trichromacy also ties in with Helmhotz’s colour matching experiment, indicating three not two photoreceptors are required for complete colour vision across the entire visible spectrum. The three pigments are most sensitive to light of a particular wavelength – approximately 430, 530 and 560 nanometres respectively. (Sekuler Blake, 2006) Figure 4 shows the each cone pigment absorbs a very wide range of wavelengths. So between 400nm and 650nm there are at least two types of cone photopigments absorbing light. In the region of 475nm, all three types of pigments are affected and stimulated. (Sekuler Blake, 2006) Hence we can conclude that the absorbance range is tremendously increased with three photopigments, and as light is reflected onto the retina every wavelength of light in the visible spectrum can be perceived in the form of colours by our brain. Trichromatic theory may explain how the existence of just three cone photopigments allows colour matching for any wavelength of light in the visible spectrum, using just three primary lights. However, it still leaves many unanswered questions when it comes to having a full understanding of how colour vision works – as Hering highlighted. Negative afterimages, the visibility of four psychologically pure hues (blue, red, green and yellow) and the absence of complementary hues such as blueish – yellow all indicate that trichromatic theory alone is inadequate in explaining how colour vision works. Hering made an important discovery with regard to afterimages. If we stare at the black dot in Figure 5 for around 30 seconds, and then look at a blank piece of paper we notice the colour of each square changes. The green changes to red and red to green, whilst the blue changes to yellow and the yellow to blue. Based on results like these, Hering proposed the concept that red and green are paired and blue and yellow are likewise paired. (Goldstein, 2010) An experiment where observers were shown patches of colour, and then asked to estimate the ratios of blue, green, red and yellow from each patch they received. Results showed that observers very rarely saw blue and yellow, or red and green together. (Abraham Gordon, 1994 cited in Goldstein, 2010) Sekuler and Blake (2006, p.255) also support this view that these complementary hues do not coexist, as â€Å"an object never appears both blue and yellow at the same time.† Hurvich and Jameson’s hue cancellation experiment st rengthens the case further, as any redness was eliminated when a green light was added to the red light. Hering also observed that those who are colour blind to red, are also colour blind to green; which ultimately led him to declare the opponent-process theory of colour vision. (Goldstein, 2010) So we can deduce from this evidence that blue is paired with yellow and red with green; the basis of the opponent-process theory. The opponent-process theory of colour vision follows the trichromatic theory, rather than replacing it, the two work hand in hand to explain how colour vision works. In fact it is the responses from the cones of the retina that form the basis of the opponent channels. (Anderson 2012) There are three opponent channels, two chromatic and one achromatic, and are formed by combining the responses from the three cone types. (Sekuler Blake, 2006) Figure 6 displays the red-green chromatic channel is comprised from the outputs of the M and L cones. It is also known as the M – L channel, as it signals the difference between the outputs of the M cones and of the L cones. (Sekuler Blake, 2006) The second chromatic channel is the blue-yellow channel, and it represents the difference between the S cone outputs and the sum of the M and L cone outputs. (Sekuler Blake, 2006) It is therefore also referred to as the S – (M + L) channel. The achromatic channel is known as the luminance channel, and combines the output of the M and L cones so we can also label it the M + L channel. The activity in this luminance channel hinges on the sum of excitation of both M and L cones (Sekuler Blake, 2006). This addition can lead determine an object’s visibility, â€Å"The shape of the photopic sensitivity curve (closely related to visibility) can be predicted by taking a sum of M and L cone responses.† (Smith and Porkorny, 1975 cited in Werner et al., 1984). Russel DeValois was responsible for the finding of opponent neurons in the retina and lateral geniculate nucleus (LGN), which could provide physiological evidence to back up Hering’s propositions. (Goldstein, 2010) The LGN is the station responsible for receiving input from the retina and transmitting it to the visual cortex. Devalois conducted experiments on LGN cells of monkeys (who have the same trichromatic vision as ours), and discovered opponent cells which behaved as if subtracting outputs from different cones and also nonopponent cells which behaved as if adding outputs from different cones. Devalois discovered opponent cells reproduced an ON or OFF response determined by the wavelength of light. (Sekuler Blake, 2006) This can explain the first chromatic channel Hering proposed (M – L) channel. Long wavelength cone excitation results in a positive or ON response, whilst medium wavelength cone excitation results in a negative or OFF response. Hence if the net re sponse is positive then a red colour is visualised (long wavelength of light), and similarly a blue colour is perceived if the net response is negative. This supports Hering’s initial observation that the hues red and green cannot coexist. Opponent cells were also responsible in explaining the S – (M + L) channel. Short wavelength cone excitation results in a positive or ON response, whilst wavelengths around 580nm (M+L) cone excitation results in a negative or OFF response. Further findings included the fact that nonopponent ON cells produced ON responses for every wavelength, although some wavelengths produced stronger responses than others and OFF cells produced OFF responses for every wavelength again with varying strengths. It is these nonopponent cells which form the achromatic channel outlined by Hering. (Sekuler Blake, 2006) All in all, colour vision begins at the photoreceptor level as explained by trichromatic theory. The outputs of the three cone photopigments have been redistributed into the achromatic and chromatic channels at the LGN, as trichromacy progresses to opponent-process theory. Palmer (1999) concludes by describing the dual process theory; in which the products from the trichromatic stage are used as the inputs for the secondary opponent-process stage. As we venture from the LGN, further into the visual system, the information is perceived by the visual cortex of the brain facilitating us with colour vision. Bibliography Anderson, S (2012). Colour vision, Vision and visual perception, Optometry. Aston University Dimitri Poumidis, (2008), Spectral Sensetivities [ONLINE]. Available at: http://www.gravurexchange.com/gravurezine/0805-ezine/ploumidis.htm [Accessed 25 January 13]. Goldstein, E. B. (2010). Sensation and perception (8th ed.) Chapter 9. Wadsworth Cengage Learning Joshua Stevens, Jennifer M. Smith, and Raechel A. Bianchetti , (2012), The Electromagnetic Spectrum [ONLINE]. Available at: https://www.e-education.psu.edu/geog160/node/1958 [Accessed 03 January 13]. Marc green, (2004), Opponent process theory [ONLINE]. Available at: http://www.visualexpert.com/FAQ/Part1/cfaqPart1.html [Accessed 09 February 13].Paul Schils , (2012), Chromatic adaptation [ONLINE]. Available at: http://www.color-theory-phenomena.nl/12.00.htm [Accessed 08 February 13]. Palmer, S. E. (1999). Vision science: photons to phenomenology, Chapter3. Massachusetts Institute of Technology Sekuler R. Blake R. (2005). Perception (5th ed.) Chapter 2. McGraw-Hill Sekuler R. Blake R. (2005). Perception (5th ed.) Chapter 7. McGraw-Hill Snowden R., Thompson P. Troscianko T. (2006). Basic Vision, Chapter 1. Oxford University Press Snowden R., Thompson P. Troscianko T. (2006). Basic Vision, Chapter 5. Oxford University Press Tom Jewett, (2009), Hue, Saturation, Brightness [ONLINE]. Available at: http://www.tomjewett.com/colors/hsb.html [Accessed 10 January 13]. Wolfe, J.M., Kleunder, K.R., Levi D.M., et al (2009). Sensation and perception (2nd ed.), Chapter 5. Sinauer Associates Inc

Henrik Isbens A Dolls House :: A Dolls House Essays

Translation Trouble In the play "A Doll House" the main character, Nora, is in a situation where she is caused to act, emotionally and physically, as a doll to please her husband. Nora has to be very sneaky and conniving in order to be perfect and talked down to by her husband. The translation of this play from Norwegian was a little difficult. The title can either be translated as "A Doll House" or as "A Doll's House". Many people believe either title fits the theme of the play. I believe that the title "A Doll's House" may fit because it is Nora being a doll in order to please her husband Torvald. Torvald sees her as his toy, not as a human equal to himself. Torvald gives his wife pet names such as "spend thrift" and "squander bird". This shows just how controlling he really is. Nora just plays along, keeping secrets from Torvald in order to please him at any expense. This was a very common situation during the era whom this play was produced. Nora is smart and capable of a lot more but she lets herself be held back in order to be the perfect wife for Torvald. The title "A Doll House" would not fit the play because this states that everyone in the house is a doll. However, Nora is the only character truly pretending to be what they are not. This title would work if everyone was trying to give off an image that wasn't true, such as Nora did. If Nora is a doll then all the other characters would be the humans playing with her, causing her to do extra ordinary tasks such as forgery and lying. The best title is definitely "A Doll's House" because Nora is the only character acting in a different manner in order to please her power hungry husband, Torvald. Even if she was conniving it was all in good intentions. It takes a very loving wife to go out of her way in order to make sure that her husband isn't burdened down with the expenses of a trip that saved his life. However, Torvald doesn't really see his Nora as his wife emotionally but as his little sex pet. This is what Nora finally realizes at the end of the play when Torvald is only worried about himself and what everyone else thinks about him.

Agency Theory Reconsidered Essay

â€Å"Angel Agents: Agency Theory Reconsidered† is an article that explores the relationship between agents and company owners. The article opens by stating the premise that company executives, who fail to operate under the every single objective of owners, don’t have the company’s best interest at heart. But the writers refute this by arguing that executives at times can be more engaging than the owners themselves; and for that reasons could make the best decisions for stakeholders. The writers pose a different spin on the Agency Theory, which holds that unless carefully monitor company executives will use information to exploit owners. The article tries to dispel the idea that agents are opportunistic but rather show ways that owners exhibit their greedy ways. The author offer examples like family owners appropriate company funds for family benefit and when poor investments by owners cause company down-sizing or acquiring. As a result CEOs are sometimes influenced by powerful owners. So in an effort to reconsider how agents can receive a  more favorable or lighter view; the writers expound on the pressures that agents operate under. The article notes how executives are majorly blame for any failures a company may experience. Furthermore, the executives position are emphasis by stating the it is virtually impossible for executives to behave appropriately, if directed poorly by owners. Writers take a look in retrospect at the â€Å"Renault Case† that deals executive Pierre Lefaucheux’s action has a company executive. In an effort to work toward his vision of created an affordable people’s car, he went up against company owners and the government and refuse to turnover company profits. Instead he invested the profits and as a result experienced phenomenal revenues and profits. In conclusion, there is evidence of agency theory in business today but the article compels the system for Angel Agents to step up and be responsible about business affairs. Although it may be risky to face those that are able to terminate you, writers provide the example of Lefauchex who faced giants receiving desired results.

History Of Ordnance Corps Essay

The Ordnance Corp is one of the oldest branches of the Army, established May 14, 1812. The U. S. Army Ordnance Department established from The Revolutionary War. General George Washington, the commander of the Continental Army, appointed Ezekiel Cheever to provide ordnance support to army in July 1775. Until 1779, all the armies had Ordnance personnel moving with them. They were civilians and Soldiers, served as conductors for maintenance – ammunition wagon and arms. Each conductor led five to six armorers who repaired small arms. In 1776, Board of War and Ordnance was created. In 1777, the first Ordnance facilities were established at Carlisle, Pennsylvania, and the first arsenal and armory operations at Springfield, Massachusetts. Other arsenals and armories were also established at Harpers Ferry, Philadelphia, and Watertown. On May 14, 1812, the Ordnance Department was organized by Congress. The Ordnance Department was responsibility for arms and ammunition production, acquisition, distribution, and storage for the war. In 1832, the Ordnance Corps had new responsibilities for researching and development of field services. Good work of the Ordnance Department continully to developed and tested during the Mexican War. The Mexican War became the foundation for the massive logistics. During the American War, the Ordnance Corps was really tested and developed. The Ordnance Corps brought massive procurement of weapons and supplies, and providing field support for fast moving armies. In 1898, Spain War, the Ordnance Corps first deployed overseas and provided close-combat support. During World War I, the Ordnance Corps mobilized and developed weapons systems, organized Ordnance training facilities, and established overseas supply depots. In World War II saw dramatic expansion of the Ordnance mission of production, maintenance and training. In both Korea War and Vietnam War, the Ordnance Corps provided supplies and maintenance, and was active in the development of rockets, guided missiles and satellites. In modern U. S. Army Regimental System, the Ordnance Corps is organized under the whole branch concept. The Chief of Ordnance serves as the Regimental  Commander, and the Office Chief of Ordnance serves as Headquarters Ordnance Corps. The Ordnance Corps will be always supporting the development, production, acquisition and sustainment of weapons, ammunitions, missiles, electronics, and mobility to supporting combat power to the U. S. Army. The insignia of the Ordnance Corps is yellow color metal shell and flame. The Shell and Flame is considered the oldest branch insignia in the U. S. army. The Shell and Flame had been used by European armies before its adoption by the U. S. army. In fact, it is still used by European armies. This insignia was assigned to the Ordnance Corps in 1832. The branch colors are crimson and yellow. At first, the Ordnance Corps had a red trail, like Artillery. In 1851, Crimson was assigned to the Ordnance Corps. Then in 1902, it was changed to black and scarlet color. Then finally, in 1921, crimson and yellow were assigned to the Ordnance Corps again. The Act of May 14, 1812, recognized the Ordnance Corps. In 1936, the army Institute of Heraldry redesigned and standardized version of the Shell and Flame. Redesigned Shell and Flame remains the current version.