IT Project Management Approaches Coursework Example | Topics and Well Written Essays - 1500 words

IT Project Management Approaches - Coursework Example It narrows down from the above two and looks at some of the specific applications in the information Technology field by looking at the Software development life cycle approach that is part of the traditional approach. It goes further in the agile approach to look at specific applications of the approach to the field of information technology. The paper also compares the two approaches by looking at their strengths and weaknesses and the type of projects to which they can be used/ applied and why they will or will not work. 1. The traditional/phased approach to project management The traditional approach to project management involves very well-organized and deliberate planning and control methods. In this approach there are distinct project life cycle stages or phases which are easily recognizable as one leads directly to another. Tasks are completed in in an orderly sequence, one after the other and this necessitates that a significant part of the entire project is planned before t he process begins (Hass, 2007,pp1-8). This model assumes that all events affecting the entire project are predictable and that the tools and the tasks undertaken by each individual are well understood. With this approach it assumes that once a phase is complete it will not be revisited, which is not the case for many projects especially IT projects. This model is forms the basis for the phased methodology used in many projects. The approach has taken many dimensions especially in the field of information technology with various sub models coming up from this traditional/phased model (Hass, 2007,pp1-8). The advantage of this approach is that it sets out the phases for development and stresses the importance of requirements for each stage. On the other hand the limitation is that projects rarely follow the sequential flow and many stakeholders find it difficult to define all the requirements for a project at the beginning(Hass, 2007,pp1-8). The approach has the following distinct stag es: initiation, planning and design, execution and construction, monitoring and controlling systems and finally the completion stage. It is important to note that not all projects will go through all the stages mentioned above some may be terminated before they get to the completion stage. 1.1. The Software Development Life Cycle (SDLC) In information technology projects, this phased approach can be compared to the software development life cycle approach (SDLC). This approach is composed of the following distinct stages that must be followed to come up with working software: planning, requirements definition, design, development, integration and testing and finally installation and acceptance (Radack, 2009, pp1-7). The planning stage aims at establishing a bird’s eye view of the proposed software product and uses this to form the basic project organization, assess feasibility and risks associated with the project and define suitable management and technical approaches. The m ost critical part concerning this stage is the listing of goals of the project and this is done before anything else (Radack, 2009, pp1-7). The requirement definition stage begins immediately the goals in the planning stage are identified. Each of these goals is then refined into a set of requirements which define the major functions of the proposed application and also define the initial data entities.

Cognitive Psychology Essay Example | Topics and Well Written Essays - 1000 words

Cognitive Psychology - Essay Example The authors’ main research questions were: If updating is the automatic result of locomotion, would people have ease or difficulty with ignoring their locomotion when walking without vision? If updating was an optional process that only occurred as the result of deliberate and effortful cognitive processing, would people find the task easy? Is the performance of people walking without vision better in the updating condition when they are told to ignore their locomotion? Is there was any difference in performance when people walked blindly to near targets compared to far targets? Are people able to overcome the information specifying their real positions in space and temporarily by adopting a different perspective, when they are given enough time to carry out the necessary cognitive operations? First hypothesis of the research was that: Performance of people while updating their spatial relationships is better as compared to when they are told to ignore their locomotion. The third hypothesis was that: If subjects can retrospectively overcome the earlier automatic spatial updating, then their performances in the ignoring condition should improve relative to the updating condition. These hypotheses were justified on the basis of background research and theory, because the authors have given an extensive review of literature citing other researchers’ works, and explaining them in order to support the need to conduct this specific research. They have cited literature which discusses the automatic updating of non-visual spatial relationships. The population of interest was young people. The sample for the first experiment included ten student volunteers from the Strathclyde University Psychology Department; and, the sample for the second experiment included ten other student volunteers from the same department and university. The sample was not very

The Gaming Industry Research Paper Example | Topics and Well Written Essays - 2000 words

The Gaming Industry - Research Paper Example Several intellectuals have benefitted from the gaming industry just as the public has faced the dangers. There is too much violence in the recent games especially killing involved to reach the final level. Fighting against the war of terror can lead to adverse effects. The Gaming Industry Ever since the rise of technology there has been an endless competition in the making of the best software or something unique to be provided in all areas of life may it be education, politics or entertainment. The gaming industry plays a vital role in the growth of not only the youth’s minds and their passion for a better gaming environment but also aided the adult firms in gambling and the social media. It is multi-faceted and has both its advantages and disadvantages. No one can deny its benefits but they cannot also disagree with the massive explosion it has caused in the global war against terrorism. The human mind is capable of imagining beyond its own strength. Hence what video games a nd recent casinos have to offer are mere fragments of humans’ imagination and there is lot more in store that yet needs to be materialized. Internet and computer are means to access video games that are in more demand especially among the teenagers or even kids as young as two. The gaming industry has become an extremely powerful method of control and manipulation throughout the different courses of life. The Childhood Years: The gaming industry has its own ways to approach each stage of life. In the childhood phase it is rather too attractive to distract a child from his main focus; learning about life and his surrounding nature. For the IT professionals it is not difficult to claim that they are struggling day and night to bring the latest in the gaming industry. Most of the games are violent in nature leading to sadistic behavior at a very early age. It also depends upon how long the child spends on playing these games because the longer he does the more chances of him get ting brutal. It becomes difficult for kids to decipher between the world of gaming and the world in which they live. They end up committing crimes which they consider to be very normal for no reason (Kutner & Olson 2008). Something changes their brain waves and directs them to do things which are inappropriate otherwise. â€Å"There is no doubt that UK developers over the past three decades have worked hard to put the country in a very strong position and it is a platform upon which we can build to ensure computer games have a rosy future for the next 30 years and beyond.† (Kingsley 2012). These developers however fail to realize the impact they have on the younger generation. US history has witnessed many stages in the development of gaming industry which includes gambling. The political and social dynamics surrounding the gaming industry have far reaching effects. It only depends on how power is used at a given point in time to manipulate the system into believing how impor tant it is for the people and their enlightenment (McGowan 2001). â€Å"Computer simulations historically have been used in specific scientific disciplines (engineering, bio-sciences) and for high-risk occupational training (military, aviation,

Anatomy and Physiology Essay Example for Free

Anatomy and Physiology Essay Activity 1: Tissue Types 1-1: List the four types of tissue found in the human body and give an example of each. 1. Epithelial example: Skin 2. Connective example: Tendons 3. Muscle example: Muscles of heart 4. Nervous example: Brain Activity 2: Epithelial tissue 2-1: What are the characteristics of epithelial tissue? Polarity, Specialized contacts, Supported of connective tissue, Avascular but innervated, Regeneration 2-2: What is the function of epithelial tissue? protection, absorption, filtration, secretion, excretion, sensory reception 2-3: Where is epithelial tissue found? Outer layer of skin, lines the open cavities of the cardiovascular, digestive, and respiratory system, also covers the walls and organs of the closed ventral body cavity 2-4: This is a cross section of the esophagus. Number 1 represents the lumen of the esophagus. Identify the tissue types indicated by 2 and 3. 2. Stratified squamous epithel 3. Dense irregular connective tissue 2-5: Below is a picture of intestinal villi. Identify the tissue type at 1 and the cell type at 3. 1. Simple columnar epithelium 3. Goblet cells 2-6: Below is a photo of the trachea. Identify the cell modifications at 1, and the tissue types at 2 and 3. 1. cillia 2. Pseudostratified epithelial layer 3. Pseudostratified columnar epithelium 2-7: Identify the tissue type at 1 below: Simple columnar epithelium 2-8: The picture below shows kidney tubules. Identify the tissue type at 1 and 3: 1. Outer wall composed of simple cuboidal epithelium 3. Nucleus of a simple cuboidal epithelial cell 2-9: The picture below shows a cross-section of a lung. The areas labeled 2 are alveoli, the air sacs of the lungs. What type tissue is 1? Simple squamous epithelium 2-10: Identify the tissue or cell types or component below. 1. (tissue type) Epithelium 2. (tissue type) Lamina Propia 3. Cillia 4. Mucin in globlet cell 5. Cilliated cells of pseudostratified epithelium Activity 3: Connective tissue 3-1: What are the characteristics of connective tissue? Common origin, Degrees of vascularity, Extracelluar matrix 3-2: What are the functions of connective tissue? binding and support, protection, insulation, transportation of substances within the body 3-3: Where would you find connective tissue? everywhere in the body, mostly in the primary tissue 3-4: The slide below is a section of the small intestine. In this tissue, the collagen fibers are interwoven and irregularly arranged (i.e. they run in more than one direction), which provides great structural strength. The tissue is well suited for areas where tension is exerted from many different directions, such as the dermis of the skin, submucosa of the gastrointestinal tract and fibrous capsules of organs and joints. It also forms fascia, the tough, white material that surrounds muscles. What classification of connective tissue is the area marked by 1? Dense irregular 3-5: The tissue below is a loose connective tissue comprised of a semi-fluid ground substance containing several kinds of loosely-arranged fibers and cells. This is the most widespread type of connective tissue. It is found in every microscopic section of the body, fastening down the skin, membranes, vessels and nerves as well as binding muscles and other parts  together. There are two types of fibers, the most numerous of which are thicker, lightly-staining collagenous fibers that crisscross the matrix in a random fashion. Thinner, more darkly stained elastic fibers composed of the protein elastin can also be seen. The principal type of cells seen are lightly-staining fibroblasts that secrete the matrix materials. Identify: 1. Fibroblast nuclei 2. Collagen Fiber 3. Elastic Fibers 3-6: This slide shows a section of a tendon with regularly arranged closely packed collagen fibers running in the same direction. This results in a flexible tissue with great resistance to pulling forces. With its enormous tensile strength, this tissue forms cord like tendons, which join muscles to bones, sheet-like aponeuroses, which attach muscles to muscles or muscles to bones, and ligaments, which bind bones together at joints. What classification of connective tissue is this? Dense regular The nuclei of the cells that secrete the collagen fibers are indicated by the number 1. What type cells are these? Collagen Fibers 3-7: The cells of the connective tissue pictured below in a cross section from the trachea are specialized for fat storage and do not form ground substance or fibers. On prepared slides, this type tissue appears somewhat like a fish net with white spaces connected together in a network. The cytoplasm and nucleus have been pushed to one side by a single, large, fat-filled vacuole that occupies the center of the cell. Identify: 1. Cell membrane 2. Cell nucleus 3. Fat Vacuoles 3-8: The slide below shows a section of the trachea (windpipe). Rings of hyaline cartilage embedded within the walls of the trachea provide support and help to maintain an open airway. Hyaline cartilage is the most common form of cartilage in the body, making up part of the nose, connecting ribs to the sternum and covering the articulating surfaces of bones. When sectioned and stained, the matrix of hyaline cartilage takes on a light purple color. Cartilage-forming cells called chondroblasts produce this matrix, which consists of an amorphous ground substance heavily invested with collagen fibers. Chondrocytes (mature cartilage cells) can be seen singly or in groups within spaces in the matrix called lacunae. The surface of all cartilage (except for articular cartilage) is covered by a membrane of connective tissue fibers called the perichondrium. Although the perichondrium is well-vascularized, cartilage tissue proper is avascular, which means that oxygen and nutrients have to diffu se from blood vessels in the perichondrium to the chondrocytes within the cartilage proper. Identify: 1. Cartilage matrix 2. Chondrocytes 3. Perichondrium 4. Adipose cells (Hint for 4: see previous slide) 3-9: This image shows a dried section of compact bone. Like cartilage, bone cells (osteocytes) occupy spaces (lacunae) found within the dense matrix. A major difference, however, is that the matrix is calcified in bone, which endows bone with the property of hardness and the ability to resist compressive forces. This calcified matrix is deposited in layers called lamellae (singular = lamella) approximately 3-7 microns thick. The most common unit of structure in compact bone is the Haversian system or osteon. In each Haversian system, the lamellae are arranged concentrically around a central Haversian canal which houses nerves and blood vessels (unlike cartilage, bone is well supplied with blood vessels). The lacunae that house  mature osteocytes in living bone appear as tapered, black spaces arranged around the concentric lamellae. Slender, branching tubules called canaliculi (little canals) radiate out from the lacunae to form an extensive network of passageways that connect the b one cells to each other and to the blood supply in the Haversian canal. Identify: 1. Lacunae 2. Haversian canal 3. Lamellae 3-10: What type connective tissue is pictured below? Blood 3-11: What is the matrix of this connective tissue? plasma, no fibers 3-12: What are the living cells of this connective tissue? Erythocytes, Leukocytes, Platelets 3-13: What is the function of this connective tissue? Carry O2, CO2, nutrients, wastes, and other substances 3-14: Identify: 1. platelets 2. neutrophils 3. lymphocytes 4. erthocytes 5. monocytes Activity 4: Muscle tissue 4-1: What are the characteristics of muscle tissue? Conductivity, Contractility, Extensibility, Elasticity The image below shows a longitudinal view of a type of muscle. Note the multiple nuclei that lie at the periphery of the muscle fibers as well as the striations (thin lines) formed by the arrangement of the thick and thin  myofilaments. It is the arrangement of these myofilaments that results in the A bands, I bands and Z lines that run perpendicular to the long axis of the myofibrils. 4-2: What type muscle tissue is this? Skeletal 4-3: Is this type muscle voluntary or involuntary? Voluntary 4-4: What is its function? locomotion, manipulation of the enviroment, facial expression, voluntary control 4-5: Identify: 1. Muscle cell nuclei 2. Muscle fiber Although the muscle below is striated, the striations are not so readily apparent as in the muscle above. These muscle cells are short, branched and interconnected. Each cell usually contains one centrally located nucleus. These muscle cells are joined end-to-end at specialized junctional zones called intercalated discs [pointed to by the blue arrows]. These discs allow force to be transmitted from one cell to another. Additionally, they contain gap junctions that allow an action potential in one cell to pass directly to an adjoining cell through these electrical synapses. 4-6: What type muscle tissue is this? Cardiac 4-7: Is it voluntary, or involuntary? involuntary 4-8: Where is it found? in the walls of the heart 4-9: This slide shows a longitudinal section of muscle that has been teased apart to reveal the individual muscle cells. Note the spindle shaped muscle fibers, each of which has a single, elongated nucleus. This type muscle is the simplest of the three types of muscle tissue. It is found where slow, sustained contractions are needed such as in the digestive tract, uterus and other internal organs. Involuntary in nature, its actions are under control of the autonomic nervous system. What type muscle is this? Smooth 4-10: The picture below is a close-up view of a single cell from above. Identify 1: Nuclei 4-11: This slide shows a cross section of the duodenum (a portion of the small intestine). Note that there are two relatively thick layers of smooth muscle cells that run perpendicular to one another, an outer (thinner) longitudinal layer and an inner (much thicker) circular layer of smooth muscle. Peristaltic contractions of these two opposing layers of muscle keep food moving through the gut. 1. Submucosal connective tissue 2. Circular smooth muscle layer 3. Longitudinal smooth muscle layer Activity 5: Nervous tissue 5-1: Name the functional cell of nervous tissue. Neurons 5-2: The slide below shows a magnified view of a multipolar neuron from the spinal cord. Note the cell body with its prominent nucleus and nucleolus and the origin of cell processes called axons and dendrites. The numerous small, darkly stained dots are the nuclei of glial cells, primarily astrocytes.

Overview Of Fractional Distillation Environmental Sciences Essay

Overview Of Fractional Distillation Environmental Sciences Essay Definition: A process by which components in a chemical mixture are separated according to their different boiling points. Vapours from a boiling solution are passed along a column. The temperature of the column gradually decreases along its length. Components with a higher boiling points condense on the column and return to the solutions; components with a lower boiling points pass through the column and are collected. Fractional distillation is used to separate mixtures of miscible liquids, such as ethanol and water. The process depends on the components of the mixture having different boiling points. The liquid is heated so that it turns into a gas. The vapours pass up a fractionating column where they are gradually cooled. As each of the components of the mixture cools to its boiling point, it turns back into a liquid. The different components of the mixture condense at different levels in the fractionating column and thus may be separated. Laboratory setup Fractional distillation in a laboratory makes use of common laboratory glassware and apparatuses, typically including a Bunsen burner a round-bottomed flask and a condenser as well as the single-purpose fractionating column. Apparatus Fractional distillation apparatus using a Liebig condenser. A conical flask is used as a receiving flask. Here the distillation head and fractionating column are combined in one piece. heat source, such as a hot plate with a bath, and ideally with a magnetic stirrer. distilling flask, typically a round-bottom flask receiving flask, often also a round-bottom flask fractionating column distillation head thermometer and adapter if needed condenser, such as a Liebig condenser, Graham condenser . vacuum adapter . Standard laboratory glassware with ground glass joints, e.g. quickfit apparatus. Discussion , Consider the distillation of a mixture of water and ethanol. Ethanol boils at 78.4  Ã‚ °C while water boils at 100  Ã‚ °C. So, by gently heating the mixture, the most volatile component will concentrate to a greater degree in the vapor leaving the liquid. Some mixtures form azeotropes, where the mixture boils at a lower temperature than either component. In this example, a mixture of 96% ethanol and 4% water boils at 78.2  °C, being more volatile than pure ethanol. For this reason, ethanol cannot be completely purified by direct fractional distillation of ethanol-water mixtures. The apparatus is assembled as in the diagram. (The diagram represents a batch apparatus, as opposed to a continuous apparatus.) The mixture is put into the round bottomed flask along with a few anti-bumping granules (or a Teflon coated magnetic stirrer bar if using magnetic stirring), and the fractionating column is fitted into the top. As the mixture boils, vapor rises up the column. The vapor condenses on the glass platforms, known as trays, inside the column, and runs back down into the liquid below, refluxing distillate. The column is heated from the bottom. The efficiency in terms of the amount of heating and time required to get fractionation can be improved by insulating the outside of the column in an insulator such as wool, aluminium foil or preferably a vacuum jacket. The hottest tray is at the bottom and the coolest is at the top. At steady state conditions, the vapor and liquid on each tray are at equilibrium. Only the most volatile of the vapors stays in gaseous form all the way to the top. The vapor at the top of the column, then passes into the condenser, which cools it down until it liquefies. The separation is more pure with the addition of more trays (to a practical limitation of heat, flow, etc.) The condensate that was initially very close to the azeotrope composition becomes gradually richer in water. The process continues until all the ethanol boils out of the mixture. This point can be recognized by the sharp rise in temperature shown on the thermometer. Typically the example above now only reflects the theoretical way fractionation works. Normal laboratory fractionation columns will be simple glass tubes (often vacuum jacketed, and sometimes internally silvered) filled with a packing, often small glass helices of 4 to 7 mm diameter. Such a column can be calibrated by the distillation of a known mixture system to quantify the column in terms of number of theoretical plates. To improve fractionation the apparatus is set up to return condensate to the column by the use of some sort of reflux splitter (reflux wire, gago, Magnetic swinging bucket, etc.) a typical careful fractionation would employ a reflux ratio of around 10:1 (10 parts returned condensate to 1 part condensate take off). In laboratory distillation, several types of condensers are commonly found. The Liebigcondenser is simply a straight tube within a water jacket , and is the simplest (and relatively least expensive) form of condenser. Industrial distillation Image 2: Typical industrial fractional distillation columns Distillation is the most common form of separation technology used in petroleum refineries, petrochemical and chemical plants , natural gas processing and cryogenic air separation plants. In most cases, the distillation is operated at a continuous steady state .New feed is always being added to the distillation column and products are always being removed. Unless the process is disturbed due to changes in feed, heat, ambient temperature, or condensing, the amount of feed being added and the amount of product being removed are normally equal. This is known as continuous, steady-state fractional distillation. Industrial distillation is typically performed in large, vertical cylindrical columns known as distillation or fractionation towers or distillation columns with diameters ranging from about 65 centimetres to 6 metres and heights ranging from about 6 metres to 60 metres or more. The distillation towers have liquid outlets at intervals up the column which allow for the withdrawal of different fractions or products having different boiling points or boiling ranges. By increasing the temperature of the product inside the columns, the different hydrocarbons are separated. The lightest products (those with the lowest boiling point) exit from the top of the columns and the heaviest products (those with the highest boiling point) exit from the bottom of the column. For example, fractional distillation is used in oil refineries to separate crude oil into useful substances (or fractions) having different hydrocarbons of different boiling points. The crude oil fractions with higher boiling points: have more carbon atoms have higher molecular weights are more branched chain alkanes are darker in color are more viscous are more difficult to ignite and to burn Figure 1: Diagram of a typical industrial distillation tower Large-scale industrial towers use reflux to achieve a more complete separation of products. Reflux refers to the portion of the condensed overhead liquid product from a distillation or fractionation tower that is returned to the upper part of the tower as shown in the schematic diagram of a typical, large-scale industrial distillation tower. Inside the tower, the reflux liquid flowing downwards provides the cooling needed to condense the vapors flowing upwards, thereby increasing the effectiveness of the distillation tower. The more reflux is provided for a given number of theoretical plates, the better the towers separation of lower boiling materials from higher boiling materials. Alternatively, the more reflux provided for a given desired separation, the fewer theoretical plates are required. Figure 2. Crude oil is separated into fractions by fractional distillation. The fractions at the top of the fractionating column have lower boiling points than the fractions at the bottom. The heavy bottom fractions are often cracked into lighter, more useful products. All of the fractions are processed further in other refining units. Fractional distillation is also used in air separation, producing liquid oxygen, liquid nitrogen, and highly concentrated argon. Distillation of chlorosilanes also enable the production of high-purity silicon for use as a semiconductor. In industrial uses, sometimes a packing material is used in the column instead of trays, especially when low pressure drops across the column are required, as when operating under vacuum. This packing material can either be random dumped packing (1-3 wide) such as Raschig rings or structured sheet metal. Typical manufacturers are Koch, Sulzer and other companies. Liquids tend to wet the surface of the packing and the vapors pass across this wetted surface, where mass transfer takes place. Unlike conventional tray distillation in which every tray represents a separate point of vapor liquid equilibrium the vapor liquid equilibrium curve in a packed column is continuous. However, when modeling packed columns it is useful to compute a number of theroticalplates to denote the separation efficiency of the packed column with respect to more traditional trays. Differently shaped packings have different surface areas and void space between packings. Both of these factors affect packing perfor mance. Design of industrial distillation columns . Figure 3: Chemical engineering schematic of typical bubble-cap trays in a distillation tower Moreover, the efficiencies of the vapor-liquid contact devices (referred to as plates or trays) used in distillation columns, as seen in Figure 3, are typically lower than that of a theoretical 100% efficient equilibrium stage. Hence, a distillation column needs more plates than the number of theoretical vapor-liquid equilibrium stages. An indication of numbers: the separation of two compounds with relative volatility of 1.1 requires a minimum of 130 theoretical plates with a minimum reflux ratio of 20.. With a relative volatility of 4, the required number of theoretical plates decreased to 9 with a reflux ratio of 0.66. In another source, a boiling point difference of 30  °C requires 12 theoretical plates and, for a difference of 3  °C, the number of plates increased to 1000. The reflux ratio is the ratio of the amount of moles returned as refluxed liquid to the fractionating column and the amount of moles of final product, both per unit time. OTHER USES OF FRACTIONAL DISTILLATION: An essential oil is a concentrated, hydrophobic liquid containing volatile aromatic compounds extracted from plants. It may be produced by distillation, expression, or solvent extraction. Essential oils are used in perfumery, aromatherapy, cosmetics, incense,medicine, household cleaning products, and for flavoring food and drink. They are valuable commodities in the fragrance and food industries. Essential oil is also known as volatile oil and ethereal oil. It may also be referred to as oil ofthe raw plant mat 1 White spirit White spirit, also known as Stoddard solvent is a paraffin-derived clear, transparent liquid which is a common organic solvent used in painting and decorating. It is a mixture of saturated aliphatic and alicyclic C7 to C12 hydrocarbons with a maximum content of 25% of C7 to C12 alkyl aromatic hydrocarbons. White spirit is used as an extraction solvent, as a cleaning solvent, as a degreasing solvent and as a solvent in aersonal. paints, wood preservatives, lacquers, varnishes, and asphalt products. In western Europe :2-Propan-1-ol Propan-1-ol is a primary alcohol with the formula CH3CH2CH2OH. It is also known as 1-propanol, 1-propyl alcohol n-propyl alcohol, or simply propanol. It is used as a solvent in the pharmaceutical industry, and for resins and cellulose esters. It is formed naturally in small amounts during many fermentation processes. Propan-1-ol Chemical properties. 1-Propanol shows the normal reactions of a primary alcohol. Thus it can be converted to alkyl halide. 3-Acetone: In chemistry acetone (also known as propanone, dimethyl ketone, 2-propanone, propan-2-one and beta-ketopropane) is the simplest representative of the ketones. Acetone is a colorless mobile flammable liquid with melting point at -95.4  Ãƒâ€šÃ‚ °C and boiling point at 56.53  Ãƒâ€šÃ‚ °C. It has a relative density of 0.819 (at 0  Ãƒâ€šÃ‚ °C). It is readily soluble in water, ethanol, ether, etc., and itself serves as an important solvent. The most familiar household use of acetone is as the active ingredient 4-Cashew The Cashew (Anacardium occidentale) is a tree in the flowering plant family Anacardiaceae. The plant is native to northeastern Brazil, where it is called by its Portuguese name Caju (the fruit) or Cajueiro (the tree). It is now widely grown in tropical climates for its cashew nuts and cashew apples. Originally spread from Brazil by the Portuguese, the cashew tree today can be found in all regions with a sufficiently warm and humid climate. What appears on the tree to be the fruit of the cashew tree is an ov 5- Cracking chemistry In petroleum qeology and chemistry, cracking is the process whereby complex organic molecules (e.g. kerogens or heavy hydrocarbons) are converted to simpler molecules (e.g. light hydrocarbons) by the breaking of carbon-carbon bonds in the precursors. The rate of cracking and the end products are strongly dependent on the temperature and presence of any catalysts. Cracking chemistry Applications. In an oil refinery cracking processes allow the production of lightproducts (such as LPG and gasoline) from 6 Perfume Perfume is a mixture of fragrant essential oils and aroma compounds, fixatives, and solvents used to give the human body, objects, and living spaces a lasting and pleasant smell. The amount and type of solvent mix with the fragrance oil dictates whether a perfume is considered a perfume extract, Eau de parfum, Eau de toilette, or Eau de Cologne. Perfume Obtaining odorants. Before perfumes can be composed, the odorants used in various perfume compositions must first be obtained. Synthetic odorants are produce 7- Chemical oxygen demand In environmental chemistry, the chmical oxygen demand (COD) test is commonly used to indirectly measure the amount of organic compounds in water. Most applications of COD determine the amount of organic pollutants found in surface water (e.g. lakes and rivers), making COD a useful measure of water quality. It is expressed in millgrams per liter (mg/L), which indicates the mass of oxygen consumed per liter of solution. Older references may express the units as parts per million (ppm). Chemical oxygen demand Over 8- Nitrogen Nitrogen is the chemical element in the periodic table that has the symbol N and atomic number 7. Commonly a colorless, odorless, tasteless and mostly inert diatomic non-metal gas, nitrogen constitutes 78 percent of Earths atmosphere and is a constituent of all living tissues. Nitrogen forms many important compounds such as amino acids ammonia nitric acid, and cyanides. Nitrogen Notable characteristics. Nitrogen is a non-metal, with an electronegativity of 3.0. It has five electron 9- Alkane Purification and use Alkanes are both important raw materials of the chemical industry and the most important fuels of the world economy. The starting materials for the processing are always natural gas and crude oil. The latter is separated in an oil refinery by fractional distillation and processed into many different products, for example gasoline. The different fractionsof crude oil have different boiling points and can be isolated and separated quite easily: within the individual fra , 10-Essential oil Production Main high-volume products turpentine; orange, lemon, mint and citronella are essential oils. Prior to the discovery of distillation, essential oils were extracted by pressing, and this is still the case in cultures such as Egypt. Traditional Egyptian practice involves pressing the plant material, and then burying it in unglazed ceramic vessels in the desert for a period of months to drive out water, the water having a smaller molecular size diffuses through the ceramic vessels while the larger essential oils do not. The lotus oil in Tutankhamuns tomb, which retained its scent after 3000 years sealed in al 11-Kerosene Distillation Kerosene is obtained from the fractional distillation of petroleum at 150 °C and 275 °C [carbon chains from the C12 to C15 range). Typically, kerosene directly distilled from crude oil requires some treatment, either in a Merox unit or a hydrotreater, to reduce its sulfur content and its corrosiveness. Kerosene can also be produced by a hydrocracker, which is used to upgrade the parts of crude oil that w

The Conflict of Paideias in Gadamers Thought :: Philosophy Philosophical Papers

The Conflict of Paideias in Gadamer's Thought (1) ABSTRACT: Although Gadamer's study of Greek paideia has been virtually ignored in the scholarly literature, I argue that it is central to his philosophy of education. Gadamer singles out three kinds of paideia: traditional, sophistic and philosophic. Traditional paideia, grounded in an unaware habit or disposition of the soul, was vulnerable when sophistic paideia brought reasoned argument against it. This 'new' paideia originally supported traditional notions of the just and the good with its conscious art of argumentation and pragmatic enhancement of success. But this paideia also undermined conventional morality by arguing that it is only convention, thereby corrupting the youth of Athens by appealing to the untrammeled desire for power. Philosophical paideia takes its bearings from the sophistic as its deepest opponent and counterimage. It turns out, however, that the two are virtually indistinguishable. Both bring thinking to consciousness; both are rhetorical arts; both create confusion; and both are subject to the 'weakness of the logoi.' In the end, the difference between them rests not on distinctions of reason, but the intent of the reasoner. This conflict of paideias is relevant to the situation of education today. Problems of narrow technical perspective and the broadest ideological manipulation are directly traceable to sophistic paideia. Thus, Gadamer points to hermeneutical praxis as 'the heart of all education that wants to teach how to philosophize.' Hans-Georg Gadamer describes the traditional ideal of Greek education as turning the student toward everything exempt from necessity comprising the beautiful. (2) This paideia consisted above all in developing a harmonious disposition of the soul, a hexis or "habit," through early training in music and gymnastic. (3) Its guiding purpose was to create citizens fit to govern in freedom. Clearly the importance of paideia as an educational concept can hardly be over-emphasized. Gadamer is an increasingly influential figure in the philosophy of education. He is also one of the eminent classicists of our times. Yet although paideia and its relevance to contemporary education forms a recurring theme in Gadamer's writings, this historical dimension of his approach to education has been virtually ignored in the scholarly literature. (4) One may speculate that the reason for this lacuna is a tendency to approach the subject more analytically than historically. Moreover, the theme appears in so many essays, spanning Gadamer's entire career, that it is difficult to follow the trail of his study. The Conflict of Paideias in Gadamer's Thought :: Philosophy Philosophical Papers The Conflict of Paideias in Gadamer's Thought (1) ABSTRACT: Although Gadamer's study of Greek paideia has been virtually ignored in the scholarly literature, I argue that it is central to his philosophy of education. Gadamer singles out three kinds of paideia: traditional, sophistic and philosophic. Traditional paideia, grounded in an unaware habit or disposition of the soul, was vulnerable when sophistic paideia brought reasoned argument against it. This 'new' paideia originally supported traditional notions of the just and the good with its conscious art of argumentation and pragmatic enhancement of success. But this paideia also undermined conventional morality by arguing that it is only convention, thereby corrupting the youth of Athens by appealing to the untrammeled desire for power. Philosophical paideia takes its bearings from the sophistic as its deepest opponent and counterimage. It turns out, however, that the two are virtually indistinguishable. Both bring thinking to consciousness; both are rhetorical arts; both create confusion; and both are subject to the 'weakness of the logoi.' In the end, the difference between them rests not on distinctions of reason, but the intent of the reasoner. This conflict of paideias is relevant to the situation of education today. Problems of narrow technical perspective and the broadest ideological manipulation are directly traceable to sophistic paideia. Thus, Gadamer points to hermeneutical praxis as 'the heart of all education that wants to teach how to philosophize.' Hans-Georg Gadamer describes the traditional ideal of Greek education as turning the student toward everything exempt from necessity comprising the beautiful. (2) This paideia consisted above all in developing a harmonious disposition of the soul, a hexis or "habit," through early training in music and gymnastic. (3) Its guiding purpose was to create citizens fit to govern in freedom. Clearly the importance of paideia as an educational concept can hardly be over-emphasized. Gadamer is an increasingly influential figure in the philosophy of education. He is also one of the eminent classicists of our times. Yet although paideia and its relevance to contemporary education forms a recurring theme in Gadamer's writings, this historical dimension of his approach to education has been virtually ignored in the scholarly literature. (4) One may speculate that the reason for this lacuna is a tendency to approach the subject more analytically than historically. Moreover, the theme appears in so many essays, spanning Gadamer's entire career, that it is difficult to follow the trail of his study.

Critique on John Holt’s Artitlce, Right to Ones Own Learning Essay

John Holt (1923-1985) was a renowned teacher and a controversial educational figure who advocated the school reform. His analysis on the concept of homeschooling from various perspectives provides a deeper insight on the beneficial aspects of this idea. It was because of the persuading appeal of his work that it became one of the forces behind the homeschooling movements of 70’s and 80’s. After graduating from his university he served the US Navy for 3 years and after concluding his duty tour he became a part of the UWF( United World Federalists). Starting from the mailroom, he was able to set his mark at the executive director post after 6 years but resigned because of the ineffectiveness of the company. It was after this history when he was constantly urged by his sister to put his efforts into teaching. Being surrounded by hundreds of young minds, he was able to analyze the bugs in the universal education system that eats up the potential of the students. Holts’ exceptional works , Escape from childhood: The needs and rights of children, How children learn and How children fail, were a reflection of his rigid belief in the idea of homeschooling. His article in the Nature Child Project emulates the same believes. In his article John Holt has been able to persuade the readers about the beneficial aspects of the concept of homeschooling while giving a detailed evaluation of the constitutional flaws of the universal education system and the necessary role of the parents in enhancing the potential of their kid. However the writer loses the interest of the readers with his biased opinion on the structure of the universal education system where he has tried to persuade the audience with an emotional impact instead of presenting a logical reasoning to support his claims, makes the audience question the credibility of the text. The compulsory universal education system in the constitution does not only breakdown the developing potential of the kids but also takes away their right of curiosity factor which gives them the freedom to learn and explore. Giving full liberty of choice does not mean that the parent’s opinion loses its worth, but, their efforts should be to provide an organized pathway to their kids so that they can lead the way with their own choices with a better perspective. Further he sheds light on the structure of the education system which exploits the ethical and emotional values of everyone involved. The necessity of performing to survive amongst the immense competition leads to each person, whether the student or the authority itself, dragging down others to get at the top. The writer carries a persuasive approach to attract and convince the audience, portraying an advantageous image of homeschooling. With his constant attack on the universal education methodology from fundamental perspective and his comments on the immoral viruses induced in the students by the structure of this education system, he is trying to highlight the audience with the necessity of homeschooling. An idea which carries a more widened approach towards learning and boosting the potential skills of the students, keeping them safe of the social isolation and the unethical morals on which the universal education system works. Highlighting the concept of universal education and the issues concerned to it, the writer has narrowed down the subject to those countries which works on this system. Though his approach to highlight the psychological aspect and the issue concerned to the development of social and ethical practices of a student are shared by all. So whilst keeping under discussion the bugs of the American Universal Education system, he has broadened the discussion to a globalised audience and highlighted the issues faced by all encompassing. Holt has given an organized structure to the content of the text. Starting with an explanation of the subject matter, he has engaged the audience to the topic under discussion and then he has pinned down the questions of the audience concerned to the topic by giving legitimate facts to support his claims. After which he gives an insight to the flaws of the universal education system which further supports his stand on the subject matter. He has tried explaining each issue using a popular style of writing, so that the text can be enjoyed by a broader audience and they can develop a clear understanding of the subject matter in the text. The uniform transition of the text has made it easier for the audience to link the following point to the one before it, and develop a clear understanding of the issues highlighted as each point being discussed is clarifying the point discussed before it. With his utter focus on the topic, he has not distracted from the main issue on a single instance. This helps the audience to develop a clear understanding of the issues he has put forth. Carrying a serious, straightforward tone and his mastery over sarcasm he has been able to depict the true image of the universal education system . His use of sarcasm on various instances in the article plays a pivotal role in helping the reader identify the reality juxtaposed against the false picture of universal education portrayed by the authorities. For example when he states ,† They thought it was enough to guarantee citizens the freedom of speech and the freedom to spread their ideas†¦.. it did not occur to them that even the most tyrannical government would try to control people’s mind†( Holt 1) This captures the interest of the readers and explains the fundamental issue of constitutional flaw concerned to education policy , which is designed in such a way that it restricts the freedom of thought and learning of the kid. On another instance he states,† It only means that if their natural authority is not strong enough parents can’t call in the cops to make the child do what they are not able to persuade him to do. † (Holt 2) Here he effectively conveys his disapproval of the hardships that the kid has to face if he/she resists the structured plan of the authorities, with that enlightening the necessity of the positive response of the parents in shaping their child’s potential. It is the attitude they carry towards their child’s potential and his field of interest, that they can either make their child or break their child. Along with sarcasm the writer makes effective use of a serious and straightforward tone to convey his thoughts on the significance of the fundamental rights which are snatched away from the students by the constitution itself , saying, â€Å"No human right except the right to life itself is more fundamental than this. (Holt 1) Further to illuminate the reader about the unethical values that are induced in us by the structure of the educational system the writer says, † In most schools, a student is every minute doing what others tell him, subject to their judgment, in situations in which he can only win at the expense of the others. † (Holt 3) On this occasion he evokes the threat to ethical and emotional values of the student body that the educational system imposes. Having said that, the writer loses the credibility of his work when he starts generalizing his opinion on a few cases and making biased assumptions while commenting on the parenting concerned questions raised by the people, when he states, † the questioner assumes and implies (though rarely says) that these bad parents are people poorer and less schooled than him. â€Å"( Holt 2) He has narrowed his response to just the poor without even being sure whether the question implies to the poor or it may be applicable to everyone. He makes strong allegations against the education system when he claims ,† schools seem to me among the most democratic, most authoritarian, most destructive and most dangerous institutions of the modern society. † (Holt 3) The absence of logical explanation to support such allegations makes the audience believe the writer is trying to put shadow on the lack of weight in his claims, by using an unnecessary emotional impact. Despite his biased assumptions and the fact that the writer has not been able to provide a logical reasoning while stating his views concerned to the social and unethical impact of the education system. His detailed explanations and a series of empirical analysis of his facts on the issues concerned to the fundamental perspective and necessity of parent’s role is commendable and many can relate to it. Therefore in this context the writer has been able to attract the readers to his opinion, as the credibility of the text carries a greater weight compared to its flaws. Although Pakistani society does not share the universal education concept, the issues brought forth by Holt concerning to academic, ethical and social development are shared by global student body. Questions concerning the duty of parents on this subject, the exploitation of ethics and freedom of learning by the authorities has become a concern for people students of Pakistani society too. The way the education system is shaped restricts the students to follow a structured plan, against their wills, to fit in the society. Lack of exposure to versatile fields of work has turned the students in to robots who are manufactured for a specific function and are dumped if not workable. A student with a sheer creative talent would be forced to become an engineer to â€Å"fit in† because of the lack of choices and resources to enhance his skills. As John Holt sheds light on the substantial duty of the parents concerned to their child , it cannot be ignored that parents are burdened with a certain responsibility to provide their child with the ideal resources, preparing them to tackle the hardships of a practical life. John Holt on the other hand was never married nor had any children. He does not share this concern and might not be able to get an insight on their perspective. Though his claim, that the positive attitude of the parent’s can boost their child’s potential, is supported by the quoted work of educational expertise in Chris Klicka’s article , Socialization: Homeschoolers are in the real world. Dr Larry Shyers after doing an empirical analysis on the subject matters concluded , † home-schooled children behave better because they tend to imitate their parents† (Klicka 1) Questions are raised regarding the socializing skills and maturity of the homeschooled students. The Psychological tests and their evaluation by the authorities in Chris Klicka’s article, † Socialization: homeschoolers are in real world, speak a different language on this concept. The widened exposure to the people of different age group and distinctive backgrounds enhances their communication skills. This concept was authorized by a respected psychologist, John Wesley Taylor. He tested the social skills of 224 children and summed up the experimental response stating ,† The study found that 50 percent of the children scored above the 90th percentile, and only 10. percent scored below the national average. † (Klicka 1) Smedley, an authority in the field of psychology, doing an experimental evaluation on this issue concluded ,† the results demonstrated that the home-schooled children were better socialized and more mature than the children in the public school. The home-schooled children scored in the 84th percentile while the matched sample of public school children only scored in the 27th percentile. † (klicka 1)This study further answers the concerning questions of the audience relating to the development and learning skills. With a liberty to pursue the work which they want to, homeschooled holds a more focused perspective which enhances their learning. They tend to perform better than the students of the universal education system, on the SAT’s and other tests which evaluates the learning skills of the students. Chris Klicka, Senior Counsel for the Home School Legal Defense Association, states in his article, â€Å"Home school families, as a whole, do not raise their children in social isolation. â€Å"( Klicka 1) which provides a supporting base to Holt’s claim on the social isolation faced by the students of the education system. Even with all logical evidence and legitimate explanation supporting Holt’s claim this ideology cannot be generalized to everyone. There are kids who would prefer to go to the school and enjoy an exposure to that environment willfully. Many scholars agree that cognitive development should not be pushed and that uniformity is provided by the organized educational system, which has reformed some of its structures to deal with the bugs that Holt’s has stated. The transition in the educational structure to tackle the bugs of the educational system is pretty evident . The perfection of the vast curriculum and academic facilities provided by the educational centers which induces an atmosphere of healthy competition and helps in shaping the potential skills of the students providing them with a better perspective. The concerns raised by John Holt about the education system are valid and there is no doubt that many people can relate to them, but, this should not let the audience ignore the voice of those who contradict with his views. Many scholars agree that the educational system should be reformed in such a way that these two contradicting views are imbued together. The education system is in sheer need of reformation and still has to deal with most of the concerns raised by John Holt, but, that does not mean students should not be given an exposure to this experience. As years have passed the platform to perform and interact with people of diverse backgrounds, provided by the educational institutes, has broadened. In conclusion, this would not just help in giving a reformed structure to the concept of learning but when exposed to the positive aspects of both the structures student can enjoy the perks of both.