Descriptive Words Essay Example for Free

Descriptive Words Essay Words Smile, grin, beam, smirk . . . Frown, scowl, glare, glower, grimace . . . Stare, gaze, gape, watch, gawk, ogle, look, examine, leer . . . Flinch, recoil, balk, cringe, shy away, pull back, wince, cower, shrink, tremble . . . Incredulous, disbelieving, skeptical, doubtful, dubious, uncertain, suspicious, questioning, vague . . . Quizzical, questioning, puzzled, surprised, perplexed, inquiring Interested, curious, involved, attentive, concerned, attracted, fascinated, engrossed . . . Sad, gloomy, cheerless, depressing, dark, dull, thick, dreary . . Happy, content, pleased, glad, joyful, cheerful, blissful, exultant, ecstatic, delighted, cheery, jovial . . . Scared, frightened, terrified, petrified, afraid, fearful, nervous, anxious, worried, timid, shy . . . Strong, burly, brawny, strapping, muscular, beefy, tough, fervent, intense, zealous, avid, eager . . . Coy, bashful, timid, modest, reserved, demure . . . Indifferent, apathetic, unresponsive . . . Remote, aloof, detached, distant . . Threatened, intimidated, alarmed, worried, anxious, troubled, upset, distressed, shocked, startled . . . Crash, thud, bump, thump, bang, thunder, smash, explode, roar, shout, scream, screech, shout, whistle, whine, squawk, blare, slam, stomp, stamp, noise, clap, bark, meow, moo, boom, yell, whisper, hum, snap, hiss, crackle . . . Taut, uptight, immobilized, paralyzed, tense, stretched, hollow, alarmed, strong, weak, sweaty, breathless, nauseated, sluggish, weary, tired, alive, feisty . . . Angry, resentful, irritated, enraged, furious, annoyed, inflamed, provoked, infuriated, offended, sullen, indignant, irate, wrathful, cross, sulky, bitter, frustrated, grumpy, boiling, fuming, stubborn, belligerent, confused, awkward, bewildered, empty . . . Angrily, anxiously, brightly, cheerfully, comfortably, curiously, delightfully, eagerly, enormously, excitedly, faintly, falsely, fearfully, foolishly, frightfully, gently, gracefully, gratefully, greedily, grumpily, helplessly, heroically, hungrily, impatiently, joyfully, kindly, luckily, magically, majestically, merrily, remarkably, splendidly, strangely, swiftly, unusually Afraid, fearful, frightened, timid, wishy-washy, shaky, apprehensive, fidgety, terrified, panicky, tragic, hysterical, cautious, shocked, horrified, insecure, impatient, nervous, dependent, anxious, pressured, worried, doubtful, suspicious, hesitant, awed, dismayed, scared, petrified, gutless . . . Bad, worse, poor, terrible, horrible, evil, wicked, corrupt, heinous, inferior, inept, ill, unfortunate , distressful . . . Big, huge, giant, gigantic, monstrous, tremendous , gargantuan , large, wide, important, influential, immense, massive, bulky, heavy, voluminous . . . Eager, keen, earnest, intent, zealous, ardent, avid, anxious, enthusiastic, proud . . . Fearless,, encouraged, courageous, confident, secure, independent, reassured, bold, brave, daring, heroic, hardy, determined, loyal, proud, impulsive . . . Good, excellent, fine, satisfactory , kind, generous, worthy, humane, pure, benign, benevolent , proper, valid, favored . . Happy, brisk, buoyant, calm, carefree, cheerful, cheery, comfortable, complacent, contented, ecstatic, elated, enthusiastic, excited, exhilarated, generous, glad, grateful, hilarious, inspired, jolly, joyous, lighthearted, merry, optimistic, peaceful, playful, pleased, relaxed, restive, satisfied, serene, sparkling, spirited, surprised, vivacious . . Hurt, injured, isolated, offended, distressed, pained, suffering, afflicted, worried, tortured . . Little, small, tiny, micros copic, miniscule, minute, inconsequential, Lilliputian, insignificant, narrow, thin, paltry, modest, slender, slight . . . Looked, gazed, peered, starched , stared, glanced, sighted, regarded , attended , viewed, inspected , directed, followed . . Nice, friendly, helpful, gentle, warm, inspiring, good-natured, kind, generous, cheerful, loving, happy, funny, peppy, relaxed, thoughtful, cooperative . . . Ran, trotted, skipped, hurried, moved, sped, operated, progressed , glided, flowed, traced, pursued, galloped, loped, fled . . . Sad, sorrowful, unhappy, depressed, melancholy, gloomy, somber, dismal, heavy-hearted, mournful, dreadful, dreary, flat, blah, dull, in the dumps, sullen, moody, sulky, out of sorts, low, discontented, discouraged, disappointed, concerned, sympathetic, compassionate, choked up, embarrassed, shameful, ashamed, useless, worthless, ill at ease . . . Said, acknowledged, acquiesced, added, addressed, admitted, admonished, advised, advocated, affirmed, agreed, alleged, allowed, announced, answered, approved, argued, asked, assented, asserted, assumed, assured, attested, avowed, babbled, bantered, bargained, barked, began, begged, bellowed, beseeched, boasted, bragged, brought, called, cautioned, charged, chided, cited, claimed, commanded, comment, commented, complained, conceded, concluded, condescended, confessed, confided, consented, contended, contested, continued, contradicted, counseled, countered, cracked, cried, debated, decided, declared, decreed, demanded, demurred, denied, denounced, described, dictated, directed, disclosed, disrupted, divulged, drawled, droned, elaborated, emphasized, enjoined, entreated, enunciated, estimated, exclaimed, explained, exposed, expressed, faltered, feared, foretold, fumed, giggled, granted, granted, grinned, groaned, growled, grumbled, haggled, hedged, held, hesitated, hinted, howled, impar ted, implied, implored, indicated, inferred, informed, inquired, insinuated, insisted, instructed, nterjected, interrogated, intimated, intimidated, itemized, jested, judged, lamented, laughed, lectured, lied, lisped, listed, made, maintained, mentioned, mimicked, moaned, mumbled, murmured, mused, muttered, nagged, narrated, noted, notified, objected, observed, opined, orated, ordered, petitioned, pleaded, pled, pointed, prayed, predicted, proclaimed, professed, prompted, pronounced, proposed, propounded, protested, proved, publicized, queried, questioned, quibbled, quipped, quoted, rambled, ranted, reaffirmed, reasoned, reassured, reciprocated, recited, recommended, recounted, referred, refuted, regretted, reiterated, rejoiced, rejoined, related, relented, remarked, reminded, remonstrated, repeated, replied, reported, reprimanded, requested, responded, restated, resumed, retorted, returned, revealed, roared, ruled, sanctioned, scoffed, scolded, screamed, shouted, shrieked, snapped, sneered, sobbed, solicited, specified, spoke, sputtered, stammered, stated, stipulated, stormed, stressed, stuttered, suggested, taunted, testified, thought, threatened, told, twitted, unbridled, urged, uttered, vowed, wailed, warned, went, wept, whispered, whistled, whooped, wrangled, yawned, yelled . . . Amazing, Attractive, Authentic, Beautiful, Better, Big, Colorful, Colossal, Complete, Confidential, Enormous, Excellent, Exciting, Exclusive, Expert, Famous, Fascinating, Free, Full, Genuine, Gigantic, Huge, Informative, Instructive, Interesting, Lavishly, Liberally, Mammoth, Professional, Startling, Strange, Strong, Sturdy, Successful, Superior, Surprise . . . Crammed, Delivered, Directed . . . Brave, Angry, Bright, Busy, Clever, Cold, Cozy, Deep, Flat, Foggy, Free, Fresh, Frozen, Gentle, Giant, Glad, Grand, Hollow, Hungry, Hurt, Lucky, Neat, New, Old, Polite, Proud, Rough, Serious, Shiny, Short, Shy, Smooth, Spotted, Strong, Tall, Tough, Weak, Wide, Wild, Wise, Bumpy, Careful, Cheerful, Chilly, Clean, Cloudy, Crisp, Damp, Enormous, Fancy, Flashy, Flowery, Frosty, Fuzzy, Huge, Icy, Kind, Marvelous, Merry, Messy, Mighty, Misty, Moldy, Plaid, Plain, Quiet, Scented, Selfish, Sharp, Slim, Slippery, Sloppy, Sly, Soggy, Spicy, Stormy, Striped, Sweet, Tasty, Thinly, Tiny, Velvety, Twinkling, Weak, Worn, Young . . .

Evaluate And Analyse The Strategic Perspective Of Tesco Marketing Essay

Evaluate And Analyse The Strategic Perspective Of Tesco Marketing Essay The aim of this write up is to evaluate and analyse the strategic perspective of Tesco. This will include checking through all the activities of Tesco both in the U.K and globally. OBJECTIVES: The aim and objective of this write up is to examine the general operating strategies of Tesco, the challenges they are facing, what motivates them, their strategic directions, what strategy they are pursing presently. Also, what challenges lies ahead of Tesco and also to know where they will be maybe in the next five years. METHODOLOGY: Materials were consulted and sorted for in order to get fundamental information about Tesco and its operations. These materials will link from books, journal and online sources. ACHIEVEMENTS: During the course of this research, we have been able to analyse Tesco strategic options, directions, aspirations and operations. The position Tesco is at the moment has been established and their future directions. However, the present achievement and success of Tesco cannot be over emphasised in recent times. CHAPTER ONE INTRODUCTION This research is basically to explore the strategies Tesco Plc is pursuing, their core competencies and their challenges. It is also to evaluate those competencies to know if they are sustainable and also if they provide customer value. Further research will be done as the research progresses. BRIEF HISTORY OF TESCO Tesco is a British international grocery and general merchandising retail chain. It is the largest British retailer by both global sales and domestic market share, with profits exceeding E3 billion and the third largest global retailer based on revenue behind WAL-MART of U.S,A and CARREFOUR of France. (http://www.evri.com) Further online source stated that the company started as a one man business in London East and was funded by JACK COHEN son of a polish Jewish tailor. He sold groceries in the markets of East end in 1919 but the brand first appeared in 1924. The name derived after Jack Cohen bought a large shipment of tea from T. E stock well( Formally messrs Torring and stock well of Mincing Lane ), he made new labels by using the first three letters of the suppliers name and the first two letters of his surname to form the word TESCO. The first store was opened in 1929 in Burnt Oak, EDGWARD- LONDON. On the part of food retailing, Tesco is one of the largest food retailers in the World, operating around 2,318 stores and employing over 326,000 people. It provides online services through its subsidiaries. The UK is the companys largest market where it operates in the following areas Extra, Superstores, Metro and Express. The company sells almost 40,000 food items, including clothing and other non-food items. The companys own-label products (50% of sales) are at three levels, value, normal and finest as well as convenience produce. Many stores have gas stations becoming one of British largest independent petrol retailers in 1991. Other retailing services offered by Tesco include Tesco personal Finance, Tesco.com and Tesco Direct launched in 2006. Tesco is a supermarket giant. Research and retail analyst have identified some reason like : Tescos are everywhere Tescos sell to everyone Tesco sells everything Tesco has branded itself in such a way that its success is inevitable. They always take into account various implications for customers, their employees, shareholders and other concerned bodies. Tesco places importance on its mission statement. Tesco have developed various international marketing strategies in various countries like China, Sweden, Malaysia, Poland, e.t.c TESCO COMPANY PROFILE According to information cited from on an online source, universitydissertations.com, Tesco runs more than 2,300 supermarket, hypermarkets and convenience stores in the United Kingdom, Ireland, central Europe and Asia. Tesco is the market leader in food retail in the United Kingdom where it has its highest market share existence compared to other countries where they operate. Tesco operates in various categories of shop sizes, from hypermarkets (Tesco extra) to small urban stores (Tesco metro) and convenience and gasoline retailing (Tesco express) including Tesco financial services. Also according to this same source, Tesco is a global leader in online grocery sales as it owns about 35 % stake in United States grocery chain called Safeways Grocery works. Tesco is a leading online grocery store at the moment; they are now evening moving into expanding their business by diversifying into other areas. TESCO SWOT ANALYSIS STRENGTHS Tesco has diverse ranges of products They have a strong cash flow position They increase sale and trade profits They have a Strong balance sheet They focus on brand awareness They have human resources Strong Online shopping facility Tesco open 24 hours a day They have a leading supermarket chain They have capabilities of converting resources into finished goods. WEAKNESSESS Perception of low quality (Tesco value brands) Lack of local knowledge of customers (international markets) Lack of foreign culture knowledge (International markets) OPPORTUNITIES Tesco develop brand awareness globally Constant New Market opportunity Market shift to globalisation Innovation and Alliances Low cost brand growth Diversification Non-Food offers Tesco untapped new markets with higher margins. THREATS New and existing competition Increase in the price of raw materials Economic recession Far-east low cost brands High competition for customers and resources CHAPTER TWO ELICITING AND EVALUATING STRATEGY Tesco is pursuing hybrid strategy in all their markets. Tesco strategies can therefore be analysed with the Bowmans strategy clock below. ssssss Tesco Position on clock C:Userspc userPicturesbowmans_lesson.gifT According to strategyexplorer.com online resource, a hybrid strategy seeks simultaneously to achieve differentiation and low price relative to competitors. Tescos Hybrid Strategy is pre-dominant in the UK market. Rival organisation like Asda seek to pursue low cost strategy and another rival, Sainsburys tend to pursue differentiation (broad) Strategy. Hybrid strategy can give an organisation advantage especially when larger volumes of sales can be achieved. This is a plus to Tesco competitive advantage considering their market share in the U.K market. Tescos aspirations in the near future are to pursue full differentiation strategy which they may want to achieve in phases. In additional to this Strategy, Tesco also utilises Market development strategy which has increased their balance sheet strength and global presence. According to online information from Tescoplc.com, Tesco Diversifying into areas like Non-food, Financial services and Telecoms and also new markets abroad in Asia, Central Europe and recently into the United Tescos strategy towards market Development has broadened their scope of business over the years into new markets outside the U.K. Tesco has an established and sustainable. Their Strategic decision to diversify in 1997 has contributed to their success in recent years. (www.Tescoplc.com) TESCO STRATEGY OBJECTIVES: According to Tesco online source, the objectives of their strategy are: To be a successful international retailer To grow the core UK business To be as strong in non-food as in food. To develop retailing services such as Tesco Personal Finance, Telecoms and Tesco.com To put community at the heart of what they do. TESCO TWO AREAS OF CORE COMPETENCIES Core and distinctive competencies are very important to any organisation who wants to lead in its industry and also provide customer value. According to Hunger J.D and Wheelan, T.L (2001) P.56, Resources are the organisations assets. Core competence capabilities, in this context mean the ability of such organisation to exploit and use these resources. These resources can be analysed by Barneys VRIO framework below. TESCO VRIO FRAMEWORK RESOURCES V R I O H.R Yes Yes Yes Yes Online shopping Yes Yes Yes Yes 24hr stores Yes Yes Yes Yes Cash Flow position Strong Yes Yes Yes Yes Balance sheet Yes Yes Yes Yes Tesco is very strong considering the resources they have at their disposal. They also utilise all these resources to the fullest. They are in a very strong position both in the U.K and around the globe where they are operating. According to tutor2u.net (online) (n.d), core competencies are those capabilities that are critical to an organisation achieving a competitive advantage. Two areas of Tesco core competencies are: The Tesco.com experience Non-food strategy strength The Tesco.com will; Effectively supply good customer interface that personalises online shopping which make it more efficient thereby giving customers value. The non-food strategy is one of the strongest tools Tesco has at the moment. It is giving them advantage to tap into new markets with very high margins. CHAPTER THREE IS TESCO CORE COMPETENCES AND STRATEGY SUSTAINABLE? If we want to analyse whether these resources and competencies are sustainable, I would say yes. I arrived at this conclusion because looking at the strategy they are pursuing and their core competencies couple with their market penetration and development around the globe, they should be able to sustain these core competencies and strategy. It can also be noted according to the speech of Tesco director that they are market leaders in most of their international markets. TESCOS PESTEL ANALYSIS POLITICAL FACTORS Tesco is a globalised company as they operate in many countries. Political conditions and legislations in these countries have highly influenced Tescos success. ECONOMIC FACTORS Tesco does not have any power over economic factors. Economic factors can affect cost, prices, demand and profits. SOCIOLOGICAL FACTORS According to Ivory research (Online) (2010), current trends have indicated that British customers have moved towards one stop and bulk shopping, which is due to various sociological changes. Aging population now eat ready meals which reduces cooking at home. TECHNOLOGICAL FACTORS Ivory research (online 2010), stated that new technologies benefit both customers and Tesco. Food chains have been more accurate and equipments like self checkout, electronic fund transfer facilities have really increased the success of Tesco globally. ENVIRONMENTAL FACTORS There have been increased demands from organisations for responsibility of the environment. Tesco has commitment on corporate responsibility to the environment they operate in. LEGAL FACTORS Various legislations from different government have influence on Tesco, For example, legislations about suppliers and so on. STRATEGIC COMMENTARY Tescos core competencies can really help them to achieve an increased competitive advantage. This is obvious because of their focus on new markets outside the U.K. Tesco needs to focus on their key strategies like the Non-food and the tesco.com. Tescos customer loyalty can be sustained by continuous customer value provision. Tapping into new international market is a good turn for Tesco has this will increase their global market share and turnover. Tescos fresh and easy brand in the United States would develop and increase their global profit turnover if they focus on that market. CONCLUSION Tescos strategic direction for the future is very important and crucial to their global strength. I can see Tesco competing closely with Grocery giant, Wal-Mart in the nearest future. Their success in the last 12 years has proved that they can really move into the global market and become like coca-cola in the nearest future.

Was Hamlet Insane Essay -- essays research papers

Was Hamlet insane? Scholars have debated this question ever since Shakespeare presented this play to the public. Although I am not a scholar, I believe that there is enough evidence in the play to suggest Hamlet had been sane. He may have been depressed and angry however this was due to the treachery and betrayal contaminating Denmark. The insanity act had been an instrument to allow Hamlet the freedom to achieve his goal of revenge. When the audience first meets Hamlet, he is dressed in black. He is in mourning over the death of his father. When questioned by Gertrude about his attire and his disposition, Hamlet replies 'But I have that within which passeth show—these are but the trappings and the suits of woe.'; (Act 1, Scene 2). Hamlet is incensed over his mother's hasty remarriage to Claudius by stating 'She married. O most wicked speed, to post With such dexterity to incestuous sheets!'; He comments that he would commit suicide if his religious beliefs allowed it. To add to Hamlets problems, his girlfriend Ophelia refuses to see him anymore. She 'did repel his letters and denied His access…';. No explanation is given to Hamlet about her actions. The audience knows that Polonius is responsible however Hamlet does not know this. Hamlet is an angry, depressed man due to life altering events. His faith in humanity is at an all time low. It is in this depressed state of mind that Hamlet meets the ghost of his father. Hamlet's friends find him ranting...

Feminist Protagonists in The Awakening and A Dolls House Essay

The Feminist Protagonists in The Awakening and A Doll's House    The idea of women's liberation is a common theme in both Kate Chopin's The Awakening and Henrik Ibsen's A Doll's House. In her analysis of Feminism in Europe Katharine M. Rogers writes, " Thinking of Nora's painful disillusionment, her parting from her children, and the uncertainties of her future independent career, Ibsen called his play 'the tragedy of modern times'" (82). The main characters in each work, Nora Helmer, in A Doll House, and Edna Pontellier, in The Awakening, portray feminist ideas. Neither Ibsen nor Chopin intended to write for the women's right's movement, but both works are classics of a woman's liberation. Ibsen is quoted as saying "that he never 'consciously worked for the women's right movement'" (82). It has also been shown that "Chopin did not intend to write a feminist tract" (Martin 252). Even though neither work was meant to be used as a feminist advocacy document, the works are excellent examples of the fact that many people were attuned to the plight of women. Nora and Edna both intend to pursue their own careers. At the time these works were written, women did not normally have their own careers. Nora enjoys the copying work she secretly does at night to earn back money for her loan. Working makes her feel less like the shallow, twittering female people think she is and more like an independent man. After Nora leaves Torvald, she wants to live on her own and support herself. Edna wants to become an artist. She tries to paint seriously every day after her return from Grand Isle. Even though Mr. Pontellier thinks her paintings are a silly hobby, Edna sells several paintings and hopes to sell more. Nora and Edna are both i... ...the works portray feminist ideas such as pursuit of careers, independence from families, and close male friends. Ibsen and Chopin were ahead of their time by writing works focusing on a topic that is still controversial a century later.    Works Cited Chopin, Kate. The Awakening. The Norton Anthology of American Literature. Ed. Nina Baym et al. 2nd ed. Vol. 2. New York: W. W. Norton & Co., 1985. Ibsen, Henrik. A Doll House (1879). Trans. Rolf Fjelde. Rpt. in Michael Meyer, ed. The Bedford Introduction to Literature. 5th edition. Boston & New York: Bedford/St. Martin's Press, 1999. Martin, Wendy, ed. "Introduction." New Essays on The (Awakening. New York, NY: Cambridge UP, 1988. Rogers, Katharine M. Feminism in Europe. Chicago: University of Illinois Press, 1982. Templeton, Joan. "Is A Doll House a Feminist Text?" (1989). Rpt. In Meyer.

Essay --

Realms of Cognition in Middle Childhood Realms of Cognition in Middle School How has technology impacted cognitive development in middle childhood? What practical advice should helping professionals give to parents who want to protect their children from harm but also proved them with the advantages of technology? â€Å"For children at the start of middle school years, school and its peer group structure represents a new frontier† (Broderick & Blewitt, 2010, p. 176). â€Å"Another problems with children’s very early use of electronic media is that it displaces, or takes time away from, other activities that are more critical for positive development† (Broderick & Blewitt, 2010, p. 182). How has technology impacted cognitive development in middle childhood? Televisions, video games, and computer has impact on cognitive development. Children needs some form of activities outside of the home. Riding bikes, and play with their friends. Playing video games, and watching televisions requires no exercise. Televisions is ok for educational programs to watch. ...

Pumps & Physics Essay

What’s new? When I was thinking about which aspect of physics to investigate for my investigation, I knew it was a good idea to choose something that really interested me. At the time I was becoming more and more fascinated by subatomic particles. I liked the fact that much of it was new and not understood properly, unlike the classical physics that everyone associates the subject with. Unfortunately, high energy physics does not translate into good practical coursework. However, while reading Six Easy Pieces, a book adapted from Richard Feynman’s famous textbook The Feynman Lectures on Physics, I noticed that a very common everyday phenomenon is still not properly understood by physicists. Encouraged by the prospect of discovering something new, I read on. Chaotic ideas Feynman wrote (on page 66) â€Å"There is a physical problem that is common to many fields, that is very old, and that has not been solved†¦It is the analysis of circulating or turbulent fluids†¦No-one can analyse it from first principles† â€Å"Wow – something science can’t explain† I thought. I looked on the internet for further details and I found a poster from World Maths Year 2000 (http://www.newton.cam.ac.uk/wmy2kposters/march/), showing just the type of unpredictable fluid motion that Feynman was writing about. It’s a new and exciting branch of maths called chaos theory and it is just beginning to be understood mathematically. The main idea is that simple systems can show very complicated behaviour that seems to have no repeating pattern. The sums that describe these systems are difficult to get your head round and appear to be way beyond my abilities as an A-Level maths student. Despite this, I felt something chaotic was an excellent phenomenon to look into for this task – it’s a chance to do some experimental work where there isn’t a perfect formula or a flawless explanation in any textbook. I couldn’t rely on distorting my results to fit a simple law, so my experimentation had to be rigorous. Limitations It was important to find a subject that was practical to investigate at school. While I was watching water swirl down the drain as I filled the kettle at home, I wondered how widely-used machines like ship’s propellers cope with the unpredictable world of chaos. Propellers have an unusual and distinctive shape designed to reduce turbulence. I wanted to investigate why this particular shape works so well – and if it can tell us anything about turbulent flow. Conveniently, water and propellers are easy-to-use in school labs (or so I thought!). Best of all, I thought, if I could model the situation but ignore the effect of turbulent water, I could look at the mechanics of the propeller, and then compare the theory with what happens in real life. It seemed like a good mix of fresh ideas and traditional physics problems. I talked about my plans to some of my teachers and one of them mentioned that his son had done a PhD degree in the formation of bubbles by marine propellers – an effect called cavitation. This encouraged me to continue with this project, knowing that it relates to current areas of research and is an important and worthwhile topic. Research It turns out that one of the most interesting applications of pumps is in fire engines. As fire services are public organisations they make available plenty of high-quality, free information online. Engineering sites were also useful. * The Physics Behind Firefighting American high-school physics project http://ffden-2.phys.uaf.edu/212_fall2003.web.dir/Matt_Taylor/Matt1.dwt * How Fire Engines Work General information http://science.howstuffworks.com/fire-engine.htm * Bedfordshire & Luton Fire and Rescue Service My local fire brigade, who I actually went to visit to find out more http://www.bedsfire.gov.uk/index.htm * American Turbine: Pump Calculations Web-based program for working out quantities in pumping http://americanturbine.net/formulacalc/pump.htm * Impeller Design The engineering that goes into pumps http://homepage.mac.com/mrbach/mixdesign.htm * Firefighting.com Useful data on pumps but uses frames so I can’t give a full URL http://www.firefighting.com * How Things Work A simple explanation of propellers and aerofoils Lesley Firth, Kingfisher, 1983 p13 * The Physics of Firefighting Some simple principles explained Physics Teacher, vol 28, p 599 * Firefighting Contains a bit of physics but interesting background information Jack Gottschalk, Dorling Kindersley, 2002, ISBN: 0789489090, p128 * Go with the flow Article about modelling granular and fluid motion New Scientist, 2 August 2003, p38-39 Preliminary Experiments I wanted to find the most efficient propeller design. From research I found out that propellers have different shapes for different tasks, so my first goal was to get a propeller up and working, and then look at what I could change to make it run more efficiently. These are the variables I aimed to evaluate for their effect on power transfer efficiency in preliminary tests: * The speed of rotation * The size of the propeller * Since speed of rotation is less time consuming to collect data for, I’ll look at it first. I intend to plot a graph of speed of rotation vs. output flow rate. Considering the shape of a ship’s propeller, I expected to be looking at these variables later on: * The number of blades on the impeller * The shape of the blades * The orientation of the blades (what angle they are in relation to the axis of rotation) The physics principles that are important here are mechanical ones. The efficiency of the propeller depends on how much of its power goes into pushing water outwards and how much is wasted on heating the water up or causing it to form whirlpools. New Scientist’s article Go with the flow mentioned the Bernoulli Effect, which is observed on aircraft wings and on propeller blades. Lower pressure Higher pressure A blade with a curved plane and a flat plane forces some air or water on a longer route over the curve, and the rest takes the shorter flat route. The longer journey over the curved plane causes a drop in pressure, which translated to lift in planes, and thrust in propellers. According to all the textbooks, the optimum number of blades, the blade angle, the speed of rotation and the size of propeller all contribute to the efficiency. It seems like I’ve got my work cut out for me. I’m going to concentrate on rotation speed and its effect on water flow rate outwards. Let’s see what the preliminary tests show. Water flows in Axle Propeller Watertight casing Water flows out Planning Risk Assessment1,2 Apparatus or procedure Hazard Precautions All apparatus Accident or fire Supervise the experiment at all times and clear away at the end of the session. Store all equipment safely and securely. Boiling water for shaping polypropene propellers Risk of scalding Take care with boiling water, paying attention at all times. Stand well back from the saucepan and do not move it while the water is hot. Use a heat-insulating towel to manipulate the hot polypropene. Electric circuit in general Risk of fire from short circuiting etc. Use insulated wires, keep connections clean and dry, and always supervise the apparatus while current is flowing. Do not leave the set-up unattended without unplugging the mains supply. Use wires of appropriate diameter to prevent overheating resulting in fire. Rapidly rotating propeller Possibility of injury from contact with rotating blades of propeller Leave motor switched off until ready to record data. Take care to keep your distance from the propeller, especially fingers. Heavy equipment (power pack, retort stands) Falling equipment could injure Ensure stands etc. are sturdily placed and avoid placing equipment near the very edge of the work bench. Power pack Output: 13V 5A DC Input: 230V mains AC Risk of electrocution from mains input (risk of injury from output voltage is minimal) Keep power pack away from the wet part of the apparatus (to prevent conduction through water). In my experiment, I will keep all the electrics on a shelf above the level of the water-containing apparatus. Ensure all water-containing equipment is as waterproof as possible, and have towels to hand to soak up spills. Do not leave the set-up unattended without unplugging the mains supply. Preliminary findings In the research and rationale section, I identified variables I wanted to investigate. I conducted preliminary experiments to found out which variables were the most practical to focus on. The basic aim is to narrow my search down to one or possibly two variables and then find the most power-efficient value for each variable. Size of propeller was very difficult to control since I found that the propeller will only stir the water unless it tightly fits the container. Small propellers did not displace any water. Only propellers with a diameter 1 or 2mm less than the diameter of the container were effective in pumping water. As such, I decided not to consider investigating this variable. Angle of propeller blade inclination is possible to vary, but I found the range of angles possible with the materials I had chosen were too limited. I developed a method of cutting out rectangles of polypropene sheeting, boiling them in water and bending them to the right shape, but the blades often snapped and it was tricky to get the blades to remain at the chosen angle as they cooled and hardened. I decided to keep blade inclination constant. 45à ¯Ã‚ ¿Ã‚ ½ might seem to be an appropriate angle of inclination to choose for all the propellers I will compare, but most propellers I found photographs of from my research showed shallower angles of blade inclination. I have decided that all my propellers will be inclined at 30à ¯Ã‚ ¿Ã‚ ½ because it is easier to make the propellers this shape and I assume that this is a more efficient angle than 45à ¯Ã‚ ¿Ã‚ ½ since many propellers are about this angle. Speed of rotation turned out to be very simple to control with the use of the variable voltage power pack. I investigated the effect of power input on rotation speed (or angular velocity of the propeller as I call it from here on in). Using a stroboscope, I determined the linear relationship between the voltage supplying the motor (V) and the angular velocity (?) of the propeller shaft in air. I adjusted the frequency of the strobe light until the propeller appeared not to rotate. At this frequency, the time between flashes of the strobe and the time for one blade of the propeller to reach the former position of the blade before it is equal. If you find the angle in radians (?) between two adjacent blades and multiply it by the frequency (f) of the stroboscope (the time between flashes), you are left with the angular velocity (?) of the propeller, i.e. the rate of rotation. ? = ?f In the table below, V and f were determined experimentally and ? was calculated by multiplying f by ?. Since the frequency is only known to two significant figures, the angular velocity can only be determined to 2 s.f. Angle between blades, ? degrees 72 Angle between blades, ? radians 0.4? V V 0 2.25 4.25 6.25 8.75 10.00 13.00 à ¯Ã‚ ¿Ã‚ ½0.25 f s-1 0 13 26 36 50 57 74 0.5 ? rad s-1 0 16 32 45 63 72 93 0.5 Once the propeller is immersed in water the relationship between ? and V changes. The relationship is non-linear and, unlike the graph above, is different for every propeller. In light of the preliminary experiments I will modify this method to vary the power supplied to the drill that drives the propeller. It will not matter that the speed of rotation varies depending on how much the water resists the motion of the propeller. The only data that are needed to calculate the efficiency of the system are power input and useful power output. Efficiency At this point it is important to mention that I am concentrating on the efficiency of the propeller at displacing water. Percentage efficiency = useful power output / power input à ¯Ã‚ ¿Ã‚ ½ 100%, or rewritten in symbols, ? = Puseful out / Pin. Also, power input is proportional to input voltage since current is constant at 5 A in my equipment. P = VI and I = 5   Power (Watts) = 5 x voltage (Volts). Review of purpose of investigation The focus of this investigation is to determine the optimum number of blades for a propeller to have to maximise energy-efficiency. Experiments will compare propellers with 2, 4 and 6 blades. The energy efficiency of the three propellers when displacing water will be determined and compared. Their efficiency may not be independent of the rate of rotation. This too will be investigated and analysed. The analysed results will show which of the three propellers is most energy efficient in at each rate of rotation investigated. Extract from Eric Weisstein’s World of Physics http://scienceworld.wolfram.com/physics/Screw.html A screw is a simple machine that is actually a version of the inclined plane. The pitch of the screw corresponds to the inclination of the plane: a higher pitch (i.e., more threads per length) means less inclination, and thus easier turning, but also more turning that needs to be done to travel a given length. As with the other simple machines, the required force is reduced, but the amount of work done is the same. Apparatus 13V max. variable voltage power pack Retort stands and clamps 15 cm ruler Silicone polymer window sealant Garden hosepipe Expanded polystyrene for supports Multimeter (0.25V, 0.25A tolerance) Polypropene sheet for making propellers PET lemonade bottles (2 Litre capacity) Plastic funnel for filling Stopwatch Collection bottle with 2 litre mark ( 0.002 L) Cordless electric screwdriver/drill Steel axle Volumetric burette PET pudding basins to contain propeller Water Colour-coded wires and crocodile clips Saucepan, hotplate and tongs for heating and reshaping polypropene into propellers Scissors and craft knife for cutting out propeller shapes from polypropene sheet Apparatus set-up These diagrams show how I designed the equipment. The circuit diagram connected to the drill represents the power pack, and its voltage selector is displayed as a variable resistor. The plastic volute is the container that houses the propeller. To begin with, water fills the water tank and the plastic volute. Activating the power pack supplies an electric current to the drill, which rotates the propeller. Variables to control Variable How I will control it Viscosity of water Constant at constant temperature and pressure Power and speed of rotation of propeller Use a power pack instead of a battery to supply the cordless drill. Use the same power pack, axle and drill throughout the experiment. Rotation speed does not vary linearly with power but carefully designing the experiment can avoid problems. Room temperature and pressure Constant at 20à ¯Ã‚ ¿Ã‚ ½C due to central heating. Atmospheric pressure changes are insignificant to this experiment. Plan for laboratory sessions Session and duration Targets Before lab work begins Build the waterproof sections of the apparatus and seal them with silicone polymer. Buy a cordless drill. First two hours Set up all apparatus, construct the propellers and test the experiment to ensure it works as planned Second two hours Measure the time taken to raise 2 Litres of water through 50cm vertically by each of the three propellers, with 65W power input Third two hours Repeat the previous session’s experiment, but with the power set at 35W. Fourth two hours By considering the results collected before this session, decide which range of power input to investigate in detail Fifth two hours Continue gathering results for chosen range of power inputs Remaining time Investigate turning points and anomalies as necessary In between lab sessions Complete results tables, draws graphs as appropriate and start to analyse findings. Use analysis to modify strategy and to make decisions on how to progress. While I was designing which equipment to use and how to use it, I thought carefully about accuracy and sensitivity. The major difficulty with this experiment is the unpredictable nature of the propellers – unlike many other things physics, it is not easy to find a good estimate of what will happen in textbooks or online. One way of ensuring good results is to measure the variables to a reasonable number of significant figures. The multimeter I chose to use is quick to respond to changes in current or potential difference and has fine graduations on its scale, providing high sensitivity. It also has very tight tolerances as it is designed for use in high performance electronics, which contributes to the accuracy of the results I will gather. The multimeter is significantly more accurate and sensitive some of the digital alternatives at school. It responds to changes much quicker too. I have had to design and build quite a large amount of equipment just to make this project possible. To measure the volume of water pumped out by the system, I will calibrate the water collection bottle with graduations. To make sure they are very sensitive and accurate, I will use the high quality, high accuracy laboratory glassware available at school for use in chemistry and biology. The percentage error on the volume graduations on these pieces of equipment is very small (around 0.0003%). References for planning section 1. Cambridge University Department of Physics Physics risk assessment form http://www.phy.cam.ac.uk/cavendish/hands/forms/RAform.pdf 2. CLEAPSS Secondary Schools website http://www.cleapss.org.uk/secfr.htm Implementing Modifications to plan Problem Solution How to water-seal the entire system Careful application of silicone sealant and gaffer tape at all junctions. Apparatus tested underwater by pressurising with air using a bike pump. Leaks located by bubbles escaping where seals were incomplete. How to get water to flow from the water reservoir into the propeller cavity, without providing any extra pressure that would reduce the workload of the propeller Height of water reservoir bottle adjusted until water just reaches the top of the propeller cavity, without spilling out the output hole How to accurately measure the volumes of water used in each experiment Volumetric glassware borrowed from chemistry department Calculation of power efficiency of pumping system ?E = mg?h P = Et-1 Useful power output = power spent on raising water against the force of the Earth’s gravitational field Useful power output = (mass of water raised (mwater) à ¯Ã‚ ¿Ã‚ ½ strength of gravity at sea level (g) à ¯Ã‚ ¿Ã‚ ½ height through which the water is raised (?h)) / time taken (t) Pout = mwaterg?ht-1 The mass of water is proportional to its volume at constant temperature and atmospheric pressure. In these experiments, the temperature and pressure have been constant at 293K (20à ¯Ã‚ ¿Ã‚ ½C) and 105 Pa respectively. Under these conditions, water has a density of 998.2 kgm-3 (according to the Nuffield Advanced Science Data Book, Nuffield-Chelsea Curriculum Trust, Longman, 1984). Therefore, the time taken to raise the water and the number of blades on each propeller are the only variables in my experiment.

Panera Bread Case Analysis

Panera Bread Company is a leader in the easy casual restaurant industry with multiple cafà ©-bakeries located in 36 states, of the United States. Panera operates under the banner of Panera and Saint Louis Bread Company. Almost 400 of its 1,027 bakeries are company-operated and the remainders are franchisees. Panera Bread’s core competencies are in their market niche, offering a premium specialty bakery and cafà © experience to suburban and urban residents. Penera’s focus is offering their customers with better than their rivals, making the dining experience so attractive to their customers will pass up their competitors in outlets of other easy casual restaurants to dine at the nearest Panera Bread A strategic issues is substitutes and threats of substitutes in Penear Bread Company’s distinctive competencies, their menu. Penera’s menu is being substituted by new rivals. New restaurant chains, in fast-casual and other categories are becoming more competitively fierce and are drawing customers by imitating Panera’s menus at a lower cost. To address this strategic issue, I recommend Panera to employ an offensive strategy to increase sales during prime times such as lunch and dinner, continue to be more innovative by implementing in-depth surveys to customers, employees, via text messages, e-mails, etc., and execute a plan for managers to manage by walking around (MBWA) communicating and listening to employees and customers. Example, this technique has worked successfully for companies like Wal-Mart who have been very successful in using the (MBWA) strategy. This will draw and boost their customer base giving them a sustainable competitive advantage.