Analysis of Abu Hamid Al-Ghazali essays

Analysis of Abu Hamid Al-Ghazali essays Abu Hamid Al-Ghazali (1058-1111 CE) is regarded by scholars as an Islamic intellectual giant. He is one of the greatest teachers and interpreters of Islam, other than Muhammad. Born in 1058 CE in Tus, (in what is now known as Khorasan, Iran), he was a well educated man, having been taught in school in his early adulthood, studying under a distinguished theologian, al-Juwayni in Nishapur. Because of his privileged upbringing and intellectual capabilities at that time, he brought into existence various manuscripts on Islamic theology and law, which are still being used in the present. Al-Ghazali lived during the period known as the Golden Age of Islam (750-1258 CE), a period of growth in the mastery of art, mathematics, astronomy, medicine, and music. After his years of study, he later moved on to easing the political struggles of his time by writing religious treatises. He was later appointed the position of rector and professor of the Nizamiyya institute in Baghdad. Baghdad, at this time was considered the intellectual centre of the known world. This institute was also the greatest seat of learning in Islam. He produced two of his most important texts, The Intentions of Philosophers and The Incoherence of Philosophers. Afterwards, Al-Ghazali resigned as professor for pilgrimages between the cities of Mecca, Medina, Tus, and Damascus, during a period of ten years. His copious work which was made up of forty books, called Revivification of the Religious Sciences, was a seminal text which outlined the significance and meaning of the practices of Islam. He link ed theology, Muslim law (Sharia) and Sufi mysticism. Al-Ghazali was a very prominent contributor in the areas of philosophy, religion and especially Sufism. Greek philosophy in his time, including Neoplatonic philosophy, was accepted and further developed by a number of Muslim philosophers which w ...

European Lion Facts and Figures

European Lion Facts and Figures Panthera leo, the modern lion, included a bewildering array of subspecies in early historical times. At least three of these- Panthera leo europaea, Panthera leo tartarica and Panthera leo fossilis- are referred to collectively as the European Lion; these big cats inhabited a broad swath of western, central and eastern Europe, ranging from the Iberian peninsula to as far east as Greece and the Caucasus. The European Lion probably descended from the same common ancestor as the Asiatic Lion, Panthera leo persica, the still-extant remnants of which can still be found in modern India. Cultural References Tantalizingly, the European Lion is referenced numerous times in classical literature; the Persian king Xerxes reportedly encountered some specimens when he invaded Macedonia in the 5th century B.C.E, and this big cat was almost certainly used by the Romans in gladiatorial combat or to dispose of unfortunate Christians in the first and second centuries A.D. Like other Panthera leo subspecies, the European Lion was hunted to extinction by humans, either for sport or to protect villages and farmland, and disappeared off the face of the earth about 1,000 years ago. The European Lion should not be confused with the Cave Lion, Panthera leo spelaea, which survived in Europe and Asia up to the cusp of the last Ice Age. Facts Historical Epoch Late Pleistocene-Modern (one million-1,000 years ago) Size and Weight Up to four feet high at the shoulder and 400 pounds Distinguishing Characteristics Large size; lack of manes in females

Effective Communications Essay Example | Topics and Well Written Essays - 1250 words

Effective Communications - Essay Example All supplies of Tylenol were pulled directly off the shelves of every store in the United States. The cost to the company to accomplish this act was over $50 million dollars, yet Johnson and Johnson accomplished this with grace and humility and gained the respect of Americans in the process. After a period of time, Tylenol was replaced on store shelves complete with new, tamper-resistant packaging, telling the public loudly and clearly that the first priority of Johnson and Johnson is the safety of the public who purchased their products, thus keeping them in business. As the text states, because of the response to the incident and their overwhelming regard for human lives, Tylenol recovered an even larger share of the market and "gained credibility, public trust, and esteem." (Federal Register). Once Johnson and Johnson issued "Our Credo," they had public opinion firmly and positively on their side. Johnson and Johnson stated to consumers that their goal was to meet the needs of those who use their product, but to do so in a responsible way. They acknowledge that they have the right to make a fair profit, which, again, puts public opinion firmly in their corner. ... Another public might be considered the people such as doctors, nurses and the institutions of hospitals that regularly dispense Tylenol to their patients. This sector of the public had a grave responsibility in the face of the Tylenol tragedy, in that they had to make absolutely sure that none of the product that could possibly have been contaminated remained in their hospitals. A possible third public could be the press, who, in many cases become the most direct line to the general public. What the press is told and what they release to the general public is extremely important and akin to walking a tightrope. The internal public would be the employees and stockholders of Johnson and Johnson. The employees were put into a difficult situation in that if public opinion, fickle as it is, had gone the "other" direction; the employees of Johnson and Johnson could well have borne the brunt of public righteous indignation. It would have become rather non-politic to answer the question "Where do you work," because the employees would have been guilty by association. The stockholders, another faction of the internal public would have been seen as equally "guilty," and it is likely that rumors would have abounded concerning the culpability of the stockholders in the aftermath of tragedy. The external public, on the other hand, I would see as the consumer of Johnson and Johnson products. I'm sure every mother and father in America experienced a sense of panic and horror when they learned of the cyanide laced Tylenol capsules, thinking it could have been their child or another parents' child that fell victim to the capsules. It was

Case study Example | Topics and Well Written Essays - 1000 words - 41

Case Study Example They were also caught with the ethics issue when oil leaked into the ocean twice. They knew that the pipes needed to be repaired yet took no action. BP however, never learned from their mistakes. Other similar instances of an oil spill were repeated. The company also engaged in buying excessive propane and then re-selling it at a higher price a case that portrayed BP as an unethical business. BP also showed recklessness to the environment when cases of oil leak repeated over and over again killing plants and animals. BP did not also care about the welfare of their stakeholders when they engaged in some of these instances. A penalty was demanded from them every time they were caught in the wrong. Part of the money they were using to pay the penalties belonged to the shareholders. Thus, they were not mindful of the shareholders welfare. Product differentiation is crucial in an industry such as the oil industry. BP failed because they were unable to produce a high-quality product. Their product would emit a smell when used as paraffin. The effect of this was that the product was not able to tap into the market competitively as should have. The British parliament chipped in and supported the product and recommended it for their local market, a move that reinforced the product market, not because of quality but because it had been given preference. The strengths that the company had was that they were able to get support from the British government led by Churchill. Churchill desire to promote their group saw him chip into the company thus boosting its finances. Other people were also able to chip in and, therefore, funds ceased to be a hindrance. The company also had an advantage in that Churchill encouraged the use of the product locally, even though it was not the best quality. Thus, creating a market for its product. The company was also lucky to have areas it could still drill more oil

Organic Light Emitting Diode Essay Example for Free

Organic Light Emitting Diode Essay Abstract: Organic Light Emitting Diode is a scalable nano level emerging technology in Flat Panel Displays and as a White Light Source with efficient features. This paper focuses on OLED structure, principle aspects, fabrication methodology and different techniques to replace current white light sources like Incandescent bulbs, Fluorescent tubes, and even display techniques like Liquid Crystal Displays, Plasma technologies. OLEDs can be fabricated using Polymers or by small molecules. OLED matrix displays offer high contrast, wide viewing angle and a broad temperature range at low power consumption. These are Cheaper, Sharper, Thinner, and Flexible. An OLED is a light-emitting diode (LED) in which the emissive electroluminescent layer is a film of organic compounds which emit light in response to an electric current. This layer of organic semiconductor material is situated between two electrodes. Generally, at least one of these electrodes is transparent. There are two main families of OLED s: those based on small molecules and those employing polymers. Adding mobile ions to an OLED creates a Light-emitting Electrochemical Cell or LEC, which has a slightly different mode of operation. OLED displays can use either passive-matrix (PMOLED) or active-matrix addressing schemes. Active-matrix OLED s (AMOLED) require a thin-film transistor backplane to switch each individual pixel on or off, but allow for higher resolution and larger display sizes. An OLED display works without a backlight. Thus, it can display deep black levels and can be thinner and lighter than a liquid crystal display (LCD). In low ambient light conditions such as a dark room an OLED screen can achieve a higher contrast ratio than an LCD, whether the LCD uses cold cathode fluorescent lamps or the more recently developed LED backlight. Due to its low thermal conductivity, an OLED typically emits less light per area than an inorganic LED. OLEDs are used in television screens, computer monitors, small, portable system screens such as mobile phones and PDA s, watches, advertising, information, and indication. OLEDs are also used in large-area light-emitting elements for general illumination. OLED s have a potential of being white-light sources that are †¢Bright, power-efficient and long lived, by emitting pleasing white light †¢Ultra-thin, lightweight, rugged, and conformable †¢Inexpensive, portable Introduction: OLEDs are energy conversion devices (electricity-to-light) based on Electroluminescence. Electro-luminescence is light emission from a solid through which an electric current is passed. OLEDs are more energy-efficient than incandescent lamps. The luminous efficiency of light bulbs is about 13 20 lm/W but the latest experimental green emitting OLEDs already have luminous efficiency of 76 lm/W, though at low luminance. The development is on track for OLEDs to effectively compete even with fluorescent lamps, which have the luminous efficiency of 50 100 lm/W. One big advantage of OLEDs is the ability to tune the light emission to any desired color, and any shade of color or intensity, including white. Achieving the high Color Rendition Index (CRI) near 100 (the ability to simulate the most pleasing white color, sunlight), is already within the reach of OLEDs. Another advantage of OLEDs is that they are current-driven devices; where brightness can be varied over a very wide dynamic range and they operate CRT is still continuing as top technology in displays to produce economically best displays. The first best look of it is its Cost. But the main problems with it are its bulkiness, Difficulties in Extending to Large area displays as per construction. Even though Liquid Crystal Displays have solved one of problem i.e. size, but it is not economical. So in this present scenario the need for a new technology with both these features combined leaded to invention of OLED.OLED which is a thin, flexible, Bright LED with self luminance which can be used as a display device. The main drawback of LCD display is its Less viewing angle and highly temperature depending which moves us towards a new technology. Thus OLED promises for faithful replacement of current technology with added flavors like Less Power Consumption and Self Luminance .Both Active matrix TFT’s and Passive matrix Technologies are used for display and addressing purposes for high speed display of moving pictures and faster response. Already some of the companies released Cell Phones and PDA’s with bright OLED technology for color full displays. One of the new lighting technology which emerged within the past two decades and has the potential of becoming more energy-efficient then the existing light sources is the Solid State Lighting technology of Organic Light Emitting Diodes (OLEDs). The available data about OLEDs and technical projections indicate that the amount of energy needed to generate the same amount of light can be eventually reduced by up to 50%.If the consumption of electric energy used for lighting is reduced by the desired 50%; the savings to the society would amount to approximately $25B per year (1). In addition to the savings, less consumed energy would amount to less produced energy and, consequently, less pollution of water and air. According to the latest estimates, the use of electricity may be reduced by 50% by the year 2020, sparing the atmosphere some 45 million tons of carbon emissions annually. The potential savings also depends on how quickly and to what extend these developments occur (2). This study also indicates that it is primarily the price breakthrough that will facilitate the market penetration of the new sources of light. In other words, even though the technological advances may lead to significant reduction of energy, the market will not accept SSL unless the cost is reduced as well. If SSL achieves a price breakthrough, far more energy will be saved. Today, incandescent light bulbs dominate the residential and light industrial lighting market where the initial cost and aesthetics are the key drivers. Fluorescent lamps are used in the commercial sector where the combined cost of the lighting fixtures and the consumed energy is the principal driver. OLEDs are unconventional, large area thin film, nearly two-dimensional devices. They are distributed (diffused) light sources, distinctly different from point sources such as light bulbs. Also, OLEDs will operate at very low voltages, of the order of 3 5 V. Therefore, the introduction of OLEDs as sources of light for general lighting applications will cause a major paradigm shift in the lighting industry. Not only a new lighting infrastructure will be required, but also many new jobs will be created. While significant research is still needed, OLEDs will soon achieve the efficiency to compete directly with incandescent sources (light bulbs). Experimental OLEDs are already more energy-efficient than incandescent lamps The luminous efficiency of light bulbs is about 13 -20 lm/W but the latest experimental green emitting OLEDs already have luminous efficiency of 76 lm/W, albeit at low luminance. The development is on track for OLEDs to effectively compete even with fluorescent lamps, which have the luminous efficiency of 50 100 lm/W. One big advantage of OLEDs is the ability to tune the light emission to any desired color, and any shade of color or intensity, including white .Achieving the high color rendition index (CRI) near 100 (the ability to simulate the most pleasing white color, sunlight), is already within the reach of OLEDs. Another advantage of OLEDs is that they are current-driven devices, where brightness can be varied over a very wide dynamic range and they operate uniformly, without flicker. All this has created a great deal of optimism that OLEDs will be accepted and welcome by the general public as long as they are inexpensive. Yet another advantage of OLEDs is that they could be deposited on any substrate: glass, ceramics, metal, thin plastic sheets, fabrics, flexible and conformable substrates, etc., and therefore, could be fabricated in any shape and design. This will open new architectural and design possibilities. Freedom to produce sources of any shape or color will create radically new illumination culture. In a nutshell, OLEDs have a potential of being large area, white-light sources that are * Bright, power-efficient and long lived, emitting pleasing white light * Ultra-thin, light weight, rugged, and conformable * Inexpensive This qualitative comparison is based on the assumption that the development of OLEDs will be successful. Monumental challenges, however, still exist to reach the goal. Over the next 5 years, the lighting market will grow to about $40B/y. Based on the novel features; OLEDs may soon capture 10% of that market. As the efficiency and cost approach the targets fluorescent lamps, 50% of the market may be captured in 10-12 years. 1.4 White Light from OLEDs OLEDs are uniquely suitable as sources of white light. The structure of light emitting Fluorescence or phosphorescence additives can be tailored to emit any desired color (see section 5.1). Mixing light from two or more sources (dopants or layers) gives light whose color is determined by the weighted average of the CIE coordinates of these sources. Given the enormous variety of known and yet-to-be synthesized dopants, both fluorescent and phosphorescent, with broad emission spectra of choice, practically any shade of white or any temperature of white light can be generated in OLEDs. Many devices have already been made in the laboratory scale and tested and some of them almost perfectly simulate the sunlight. The methods of generating white light are described in Sections 5.1.4. And 5.1.5. 2. OLED Components Like an LED, an OLED is a solid-state semiconductor device that is 100 to 500 nanometers thick or about 200 times smaller than a human hair. OLEDs can have either two layers or three layers of organic material; in the latter design, the third layer helps transport electrons from the cathode to the emissive layer. In this article, well be focusing on the two-layer design. An OLED consists of the following parts: Substrate (clear plastic, glass, foil) The substrate supports the OLED. Anode (transparent) The anode removes electrons (adds electron holes) when a current flows through the device. Organic layers These layers are made of organic molecules or polymers. Conducting layer This layer is made of organic plastic molecules that transport holes from the anode. One conducting polymer used in OLEDs is polyaniline. Emissive layer This layer is made of organic plastic molecules (different ones from the conducting layer) that transport electrons from the cathode; this is where light is made. One polymer used in the emissive layer is polyfluorene. Cathode- (may or may not be transparent depending on the type of OLED) The cathode injects electrons when a current flows through the device. The biggest part of manufacturing OLEDs is applying the organic layers to the substrate. This can be done in three ways: †¢ Vacuum deposition or vacuum thermal evaporation (VTE) In a vacuum chamber, the organic molecules are gently heated (evaporated) and allowed to condense as thin films onto cooled substrates. This process is expensive and inefficient. †¢ Organic vapor phase deposition (OVPD) In a low-pressure, hot-walled reactor chamber, a carrier gas transports evaporated organic molecules onto cooled substrates, where they condense into thin films. Using a carrier gas increases the efficiency and reduces the cost of making OLEDs. †¢ Inkjet printing With inkjet technology, OLEDs are sprayed onto substrates just like inks are sprayed onto paper during printing. Inkjet technology greatly reduces the cost of OLED manufacturing and allows OLEDs to be printed onto very large films for large displays like 80-inch TV screens or electronic billboards. 3. Working Principle of Oled OLEDs emit light in a similar manner to LEDs, through a process called electro phosphorescence. The process is as follows: 1. The battery or power supply of the device containing the OLED applies a voltage across the OLED. 2. An electrical current flows from the cathode to the anode through the organic layers (an electrical current is a flow of electrons). The cathode gives electrons to the emissive layer of organic molecules. The anode removes electrons from the conductive layer of organic molecules. (This is the equivalent to giving electron holes to the conductive layer.) 3. At the boundary between the emissive and the conductive layers, electrons find electron holes. When an electron finds an electron hole, the electron fills the hole (it falls into an energy level of the atom thats missing an electron). When this happens, the electron gives up energy in the form of a photon of light (see How Light Works). 4. The OLED emits light. 5. The color of the light depends on the type of organic molecule in the emissive layer. Manufacturers place several types of organic films on the same OLED to make color displays. The intensity or brightness of the light depends on the amount of electrical current applied: the more current, the brighter the light. [pic] Schematic of a bilayer OLED: 1. Cathode (−), 2. Emissive Layer, 3. Emission of radiation, 4. Conductive Layer, 5. Anode (+) A typical OLED is composed of a layer of organic materials situated between two electrodes, the anode and cathode, all deposited on a substrate. The organic molecules are electrically conductive as a result of delocalization of pi electrons caused by conjugation over all or part of the molecule. These materials have conductivity levels ranging from insulators to conductors, and therefore are considered organic semiconductors. The highest occupied and lowest unoccupied molecular orbital (HOMO and LUMO) of organic semiconductors are analogous to the valence and conduction bands of inorganic semiconductors. Originally, the most basic polymer OLEDs consisted of a single organic layer. One example was the first light-emitting device synthesized by J. H. Burroughs et al., which involved a single layer of poly (p-phenylene vinylene). However multilayer OLEDs can be fabricated with two or more layers in order to improve device efficiency. As well as conductive properties, different materials may be chosen to aid charge injection at electrodes by providing a more gradual electronic profile, or block a charge from reaching the opposite electrode and being wasted. Many modern OLEDs incorporate a simple bilayer structure, consisting of a conductive layer and an emissive layer. More recent developments in OLED architecture improves quantum efficiency (up to 19%) by using a graded heterojunction. In the graded heterojunction architecture, the composition of hole and electron-transport materials varies continuously within the emissive layer with a dopant emitter. The graded heterojunction architecture combines the benefits of both conventional architectures by improving charge injection while simultaneously balancing charge transport within the emissive region. During operation, a voltage is applied across the OLED such that the anode is positive with respect to the cathode. A current of electrons flows through the device from cathode to anode, as electrons are injected into the LUMO of the organic layer at the cathode and withdrawn from the HOMO at the anode. This latter process may also be described as the injection of electron holes into the HOMO. Electrostatic forces bring the electrons and the holes towards each other and they recombine forming an exciton, a bound state of the electron and hole. This happens closer to the emissive layer, because in organic semiconductors holes are generally more mobile than electrons. The decay of this excited state results in a relaxation of the energy levels of the electron, accompanied by emission of radiation whose frequency is in the visible region. The frequency of this radiation depends on the band gap of the material, in this case the difference in energy between the HOMO and LUMO. OLEDs are solid-state devices composed of thin films of organic molecules that create light with the application of electricity. OLEDs can provide brighter, crisper displays on electronic devices and use less power than conventional light-emitting diodes (LEDs) or liquid crystal displays (LCDs) used today. 4. Types of OLEDs: Passive and Active Matrix There are several types of OLEDs: †¢ Passive-matrix OLED †¢ Active-matrix OLED †¢ Transparent OLED †¢ Top-emitting OLED †¢ Foldable OLED †¢ White OLED Each type has different uses. In the following sections, well discuss each type of OLED. Lets start with passive-matrix and active-matrix OLEDs. 1. Passive-matrix OLED \ (PMOLED) PMOLEDs has strips of cathode, organic layers and strips of anode. The anode strips are arranged perpendicular to the cathode strips. The intersections of the cathode and anode make up the pixels where light is emitted. External circuitry applies current to selected strips of anode and cathode, determining which pixels get turned on and which pixels remain off. Again, the brightness of each pixel is proportional to the amount of applied current. PMOLEDs are easy to make, but they consume more power than other types of OLED, mainly due to the power needed for the external circuitry. PMOLEDs are most efficient for text and icons and are best suited for small screens (2- to 3-inch diagonal) such as those you find in cell phones, PDAs and MP3 players. Even with the external circuitry, passive-matrix OLEDs consume less battery power than the LCDs that currently power these devices. 2. Active-matrix OLED (AMOLED) AMOLEDs have full layers of cathode, organic molecules and anode, but the anode layer overlays a thin film transistor (TFT) array that forms a matrix. The TFT array itself is the circuitry that determines which pixels get turned on to form an image. AMOLEDs consume less power than PMOLEDs because the TFT array requires less power than external circuitry, so they are efficient for large displays. AMOLEDs also have faster refresh rates suitable for video. The best uses for AMOLEDs are computer monitors, large-screen TVs and electronic signs or billboards. 3. Transparent OLED Transparent OLEDs have only transparent components (substrate, cathode and anode) and, when turned off, are up to 85 percent as transparent as their substrate. When a transparent OLED display is turned on, it allows light to pass in both directions. A transparent OLED display can be either active- or passive-matrix. This technology can be used for heads-up displays. 4. Top-emitting OLED Top-emitting OLEDs have a substrate that is either opaque or reflective. They are best suited to active-matrix design. Manufacturers may use top-emitting OLED displays. 5. Foldable OLED Foldable OLEDs have substrates made of very flexible metallic foils or plastics. Foldable OLEDs are very lightweight and durable. Their use in devices such as cell phones and PDAs can reduce breakage, a major cause for return or repair. Potentially, foldable OLED displays can be attached to fabrics to create smart clothing, such as outdoor survival clothing with an integrated computer chip, cell phone, GPS receiver and OLED display sewn into it. 6.White OLED White OLEDs emit white light that is brighter, more uniform and more energy efficient than that emitted by fluorescent lights. White OLEDs also have the true-color qualities of incandescent lighting. Because OLEDs can be made in large sheets, they can replace fluorescent lights that are currently used in homes and buildings. Their use could potentially reduce energy costs for lighting. Reference: http://impnerd.com/the-history-and-future-of-oled http://en.wikipedia.org/wiki/Organic_light-emitting_diode http://www.oled-research.com/oleds/oleds-history.html http://www.voidspace.org.uk/technology/top_ten_phone_techs.shtml#keep-your-eye-on-flexible-displays-coming-soon http://www.pocket-lint.com/news/news.phtml/23150/24174/samsung-say-oled-not-ready.phtml http://www.cepro.com/article/study_future_bright_for_oled_lighting_market/

Discoveries of the (Dinosaur) Incisivosaurus Gauthier, and (Hominid) Sahelanthropus Tchadensis :: Anthropology Essays Paleontology Papers

Discoveries of the (Dinosaur) Incisivosaurus Gauthier, and (Hominid) Sahelanthropus Tchadensis In the year 2002 a bizarre looking theropod dinosaur fossil was found in China (Xu). It challenges the way researchers have been thinking of theropods and other dinosaurs for a long time. In the Sahara desert, the oldest hominid skull in the world was found that same year. These are just two of many discoveries that have challenged the way we perceive the ancient world. Incisivosaurus Gauthier was what is believed to be a primitive Oviraptorosaurian that was recently discovered in China. The Theropod and its highly specialized skull is described as a bizarre creature that lived 128 million years ago (Gee). The characteristic that â€Å"sticks out† the most are it’s rodent-like teeth. Harry Gee has described the dinosaur as â€Å"a [cross between] Roadrunner [and] Bugs Bunny† (Ibid.) and Hillary Mayell calls it a â€Å"’Weird’ Bucktoothed Dino.† (Mayell) Oviraptorosaurians are known for their specialized skulls and for being egg thieves, which is where they get their name. It was later discovered that they were more than likely near the nests not to eat the eggs but hatch them. In Mongolia there was a discovery of a fossil of a female Oviraptor shielding her nest from a sandstorm (Mayell). They are thought to have evolved in the early Cretaceous (Xu). The Cretaceous period, is the interval of time that came just after the most well known of periods in the earth’s history, the Jurassic. Xing Xu, the man who with his team found Incisivosaurus, works for Institute of Vertebrate Paleontology and Paleoanthropology in Beijing, China. Xu and his team believe that this find proves that not all theropods ate meat (Ibid). In an article for the National Geographic, Phillip Currie of the Royal Tyrell Museum of Paleontology in Canada says, "These teeth are totally inappropriate for eating meat. Even with the beak, we had always assumed that oviraptorosuars were still carnivorous—hawks and eagles do it quite well. But these teeth are teeth you expect to see in an herbivore† (Mayell). Researchers believe that Incisivosaurus shows a link between typical theropods and the more rare or at least bizarre Oviraptorosaurians which are more birdlike (Gee). Xu also believes that this may show a link between the Oviraptorosaurians and an herbivorous group of dinosaurs, the Therizinosaurs. Which shows that not all of them were carnivores (Mayell).

Decision Making Problem

For Problems 1-3 below, submit a non-technical consulting report (approximately ? a page for each problem) accompanying by a technical appendix. The report should highlight your findings (e. g. business implications) and be prepared as if to be presented to an audience that has little knowledge of quantitative models. The technical appendix should include a formulation of a linear model, as we did in class (decisions, objective, constraints), and standard printouts of the spreadsheet model with an optimal solution (see Instructions for Standard Printouts below). Problem 1: Perfume (30 marks)Rylon Corporation manufactures Brute and Chanelle perfumes. Raw material costs $3 per pound. Processing a pound of raw material takes one hour of laboratory time, and yields 3 ounces of Regular Brute and 4 ounces of Regular Chanelle perfume. Regular Brute can be sold for $7/ounce and Regular Chanelle can be sold for $6/ounce. Rylon has the option of further processing Regular Brute perfume to prod uce Luxury Brute perfume, selling for $18/ounce. Each ounce of Regular Brute processed requires additional 3 hours of laboratory time and yields one ounce of Luxury Brute at a cost of $4.They can also process Regular Chanelle into Luxury Chanelle. Processing an ounce of Regular Chanelle requires 2 additional hours of lab time and yields one ounce of Luxury Chanelle, again at a cost $4. Luxury Chanelle sells for $14/ounce. Rylon has 4000 pounds of raw material on hand, and 6000 hours of lab time available. How can they maximize their profit? SKOLKOVO FT MBA Problem 2: Production & advertisement (35 marks) Your firm makes fluorescent paint pigments in four plants and ships them to four distributors (abbreviated â€Å"D1† through â€Å"D4†), as follows: Plant Northeast Southeast NorthwestSouthwest Unit Shipping Cost To D2 D3 Capacity Unit Cost Impurities D1 1000 $ 12. 40 12 $ 1. 20 $ 1. 75 $ 2. 35 1250 $ 11. 55 15 $ 1. 95 $ 1. 35 $ 1. 75 950 $ 10. 85 18 $ 2. 45 $ 1. 50 $ 2. 10 1200 $ 12. 05 12 $ 2. 75 $ 2. 25 $ 2. 00 D4 $ 2. 85 $ 2. 15 $ 1. 95 $ 1. 45 The distributors' demand for the pigments is as follows: D1 15. 0 Max Impurities 700 Base Demand Advertising Sensitivity 0. 05 D2 15. 0 600 0. 1 D3 14. 0 550 0. 05 D4 15. 5 675 0. 125 For example, distributor D1 will accept up to 700 units of pigment, plus 0. 05 units for every dollar you spend on national advertising.Advertising is not separated by distributor: a single expenditure affects all distributors simultaneously. Thus, if you spend $100 on advertising, D1's demand will be 700 + (0. 05)(100) = 705 units, D2's demand will be 600 + (0. 1)(100) = 610 units, D3's demand will be 555 units, and D4's demand will be 687. 5 units. â€Å"Max impurities† indicates the maximum average impurity level allowed for shipments to each distributor. For instance, the shipments from the four plants to D1, when mixed together, should have an average impurity level of at most 15. . You have at most $59,000 to spend on production, shipping and advertising, and all the distributors pay you $28. 50 per unit. How can you maximize your profits? Note: this problem combines blending, transportation, and elements of the â€Å"pickles† problem. 1) 2) Formulate a linear model. Give clear definitions to your decision variables. Set up a spreadsheet model. Use Solver to find the optimal solution. SKOLKOVO FT MBA Problem 3: Kingston Manufacturing (35 marks) Kingston Manufacturing produces heads for engines used in the manufacture of trucks.The production line is highly complex and measures 500 meters in length. Two types of engine heads are produced on the line: the P-Head and the H-Head. The P-Head is used in heavy duty trucks and the H-head is used in smaller trucks. Because only one type of head can be produced at a time, the line is either set up to manufacture the P-Head or the H-Head, but not both. Changeovers from producing one type to the other are made on weekends and cost $500. The line has capacity to produce the PHead at 100 units per week and the H-Head at 80 units per week.Kingston Manufacturing has just shut down for the week and the line has been producing the PHead. The manager wants to plan production and changeovers for the next eight weeks. Currently Buckeye has an inventory of 125 P-Heads and 143 H-Heads. Inventory carrying costs are charged at an annual rate of 19. 5% of the value of inventory. The production cost for the P-Head is $225 and for the H-Head is $310. The objective in developing a production schedule is to minimize the sum of production cost, inventory carrying cost and changeover costs.Kingston Manufacturing has received the following requirements schedule from its customer (an engine assembler) for the next nine weeks. Week 1 2 3 4 5 6 7 8 9 Product Demand P-Head H-Head 55 38 55 38 44 30 0 0 45 48 45 48 36 58 35 57 35 58 Safety stock requirements are such that week-ending inventory must provide for at least 80% of next week’s demand. You should prepare a production and changeover schedule report for the Kingston Manufacturing management to minimize total costs for the next eight weeks. (Hint: To model the changeover costs, you may introduce a binary decision 1, if there is a changeover in week = 1, †¦ 8. Let a binary variable represent a decision whether to produce Pheads ( = 1) or H-heads ( = 0) in week , = 1, †¦ 8. Then you need the constraints which say that if you change the production in week from P-heads to H-heads or H-heads to P-heads, must be 1: ? ? 1 and ? 1 ? .) Instructions for Standard Printouts Throughout the course, I will ask for â€Å"standard printouts† of your Excel models.The standard printouts for a model consist of two things. The first is a printout of the model as a set of values, the way it usually appears on the screen. To get this printout, you perform the following steps: †¢ †¢ †¢ †¢ †¢ Go to Print/Page Setup. Click on the Sheet tab. If there is no â€Å"X† in the box next to â€Å"Gridlines† and â€Å"Row and Column Headings†, click there so that one appears. Click OK Click on the printer icon in the toolbar, or choose Print†¦ from the file menu to print the spreadsheet. If possible, you should try to make each spreadsheet printout fit on a single page.Under the Print/Settings select â€Å"landscape† orientation, and â€Å"fit sheet on one page† before you print. The second printout should be as a set of formulas. It should show the formulas in your spreadsheet; for optimization models (which will be most of our spreadsheets), it should also clearly indicate the target cell, the changing cells, and all constraints. Also indicate whether you are minimizing or maximizing the target cell. To get this printout, follow these steps: †¢ †¢ †¢ Type control-tilde (hold down â€Å"ctrl† and type the key marked ` ~) Adjust the column widths so that you can see all the formulas.Print out the spreadsheet, using the same procedure as above. To indicate the target cell, minimization or maximization, changing cells, and constraints, you may make handwritten notations on this second printout. Alternately, you may make notations using text and graphics on the spreadsheet itself. Excel will let you draw arrows right on your spreadsheet. Points will be deducted if you fail to follow these guidelines. Common errors are forgetting the row and column headings, or not clearly indicating the changing cells, target cell, or constraints. To go back to the values view, type control-tilde