The Modem Essay Example For Students

The Modem Essay First of all I would like to start with an introduction I chose this topicbecause I thought it would be interesting to learn about how a modem works in acomputer. With modem we are able to access the Internet BBS or Bulletin BoardSystems. The MODEM is one of the smartest computer hardware tools ever created. modem isan abbreviation of Modulator De Modulator it is fairly simple to explain;through the telephone lines we are able to send messages between one singlecomputer or a group of computers. The Originating computer sends a coded messageto the Host computer which decodes it and there we have the power to access theInternet, talk to other people through terminal programs and retrieve files fromother computers. The first patented computer modem was made by Hayes in theearly eighties and from there they rapidly developed the first modem speed was300 baud and from there a 600 baud than 1200 and so on. The fastest modem madetoday is a 56k which is very fast. Not as fast as ISDN (The Wave offered throughRogers cable) or even as advanced as Satellite modem. Most people now have 14.4or 28.8 baud modems (Baud is Slang for Baud Rate Per Second) the reason forthe increase in 14.4 and 28.8s is that they are cheap and fairly re cent andhavent gone out of date yet. There are two types of modem external andexternal modems internal plugs into a 16 bit port inside your computer andexternal connects through either a serial (mouse)port or a parallel(printer)port most people like the external modems because they dont take up anextra space in your computer (according to PC Computing) prices in modems rangeprice from $100 (28.8bps) to $500(software upgradable 56k). Facsimile machinesalso have a form of modem in them, usually a 2400baud modem to decode themessage. So imagine a world without the modem for a second; NO fax NO InternetNO direct computer communications whatsoever. We will write a custom essay on The Modem specifically for you for only $16.38 $13.9/page Order now The three major modem manufactures are Hayes (original modem) US Robotics andMicrosoft. In conclusion life today it would be very hard to live without modems somebusinesses would cease to exist due to ill communications between offices andwithout modems we wouldnt have videoconfrencing e-mail and other tools we havecome to rely on in the past 15 years not to mention the phone companies loss nothaving to put in all of those extra phone lines because normal voice lines aretied up due to modem use. I believe that the modem is a very important andinteresting tool of communication and the Internet is wonderful for knowledgedue to the fact that is where I got almost all of my information today. Thank--You for reading my independent study and I hope you learned something from it. Category: Technology

20 Extremely Easy Ways to Building Confidence at Work

20 Extremely Easy Ways to Building Confidence at Work Successful people tend to have at least one thing in common: confidence. If confidence isn’t already your strong point, it can be tough to figure out how to get some and apply it to your own life. Where do people find this mysterious elixir that lets people crush it, and let others know they’re crushing it? Unfortunately for us, there’s no magic involved in building confidence at work. But there is some good news: there are plenty of simple things you can do to boost your own confidence, and boost your career in the process.According to The Muse, building  confidence at work has three basic components:Comfort level in what you’re doing and what your goals are.Your understanding of what your strengths and talents already are, as well as your limitations.Your ability to trust your instincts (or ignore them), depending on the situation.Broken down this way, this gives you a very basic attack plan for boosting your own confidence in your work, and setting yo urself up for future success. Confidence is a unique skill in that there’s an art to it, sure, but also plenty of manageable, concrete things you can do to try to build your confidence. [via Happify]Let’s look at some of the things you can do to raise that confidence factor.1. Know your comfort zone.Are you comfortable with your daily tasks at work? Do you feel secure at your company, with the parameters of your work? Once you’ve sat down to figure out how you fit into the bigger picture at work, and how everything works, you can let go a little and feel more relaxed about your role.2. Make a list of things that would make you feel more comfortable at work.Maybe it’s working with your boss to adjust your workload, or taking on new responsibilities that are more in line with your long term goals. Maybe it’s connecting more with coworkers so that you work better with them on projects. Or maybe it’s as simple as promising to take a lunch break every day, or clean off your desk before you leave in the evening so that things don’t feel chaotic when you come back in the morning. Whatever is on the list, it should include tasks that will make you feel happier and more in tune with your job.3. Communicate more openly.If you have concerns, vent them! If these are issues you feel comfortable discussing with your manager, great. If not, it’s totally fine to have a trusted confidante (at or outside of work) with whom you can talk about anxieties and frustrations. Don’t keep things bottled up, because then they fester and become longer-held resentments. Similarly, if you have issues with a coworker, don’t just sit on them. Discuss them in a rational, professional way before miscommunications pile on miscommunications, and everyone’s ticked off. Being open about things (and getting in the habit of doing it) can make you feel like you have more control over a situation, as well as what the next step s are.4. Get outside feedback and help prioritizing.Confident people know they can handle what’s on their plate. That’s not because they can magically handle everything, but because they know what’s important and what they can do. If you feel overwhelmed, work with your boss to figure out how to restructure your tasks and make sure your head is in the game for the most important ones.5. Learn new skills.One of the best ways to feel more confident is to go out and get more skills. Feel a little insecure about your tech know-how? Find online tutorials. Scared of presenting? Take an improv class. Anxiety and self-doubt often stem from being unsure about how to tackle new things. If you dive right in and discover that you have the skills to take on new things, it’ll start to bolster your general confidence.6. Expand your network.Nobody is an island, right? Make sure you’re adding to your network all the time. It’s like having a virtual posse beh ind you, and can make you feel less like you’re out there on the high wire all alone. Feeling supported is key to confidence. You can build your network by trying to find open social events in your field, or by using social media.7. Engage experts in your field.This is kind of like building your network, but adds the step of trying to start dialogues with people in your field who Know Their Stuff. With social media, it’s easier than ever to follow someone’s posts, then offer comments and ask questions accordingly. It may not be the most personal connection, but it gets you in the habit of dialoguing about your own experience while learning from others’.8. Accept self-doubt.Even the most confident people have self-doubts. The key is in not letting those define your decisions, or just ignoring them completely. Self-doubt is kind of a mental check on our instincts. When you feel them, think about whether the concern is valid or not, and what you can do to fe el comfortable enough to push past those doubts.9. Sit up straight.This is a very physical thing you can do to start feeling more powerful and confident right away. Flash back to all those times your parent or a teacher told you to stop slouching. They weren’t doing it to be annoying- there are studies that show that good posture correlates strongly to confident thinking.10. Get physical.If you’ve got your head down working on something, it can start to feel like you’re in a bubble, with your own perspective swirling around and around. Taking a break to get up and walk around, do yoga for half an hour, etc. gives your brain some space, allowing you to come back and feel confident that you know what you need to do next.11. Drop a few off-color words.Of course, this one really depends on your audience- a meeting with colleagues and higher-ups is not the time to debut your new Swear Like a Pirate policy. But using strong words makes us feel strong and confident.12. Try some power posing.Body language is everything, according to social psychologist Amy Cuddy. Throwing a few power poses into your repertoire at work can make you feel more self-assured. You can channel your inner superhero while you stand with hands on hips, lean forward with hands flat on a desk or table, or sit back with your hands behind your head. These poses get you into an ownership mindset where you feel strong and self-assured.13. Use some daily affirmations.Okay, so gazing into the mirror and whispering sweet nothings to yourself sounds a little weird. I get it. But having a quick set of positive things that you say to yourself can help you feel more confident as you get ready to go about your day. Make statements like, â€Å"I WILL achieve _____ today,† or â€Å"I am so ready for this† as you’re getting ready for work.14. Envision success.Vision boards may not be everyone’s cup of tea- the arts and crafts part is optional. But having a clear image in your head of what your success looks like (on a project, in a year on the job, or whatever parameters you want to use) can make you feel more self-assured on your path to get there.15. Work on your physical appearance and confidence.You know the old clichà © â€Å"dress for success†? Well, it’s a pretty true clichà ©. Wear clothes that make you feel put-together and ready for the world. (Work appropriate ones, of course.) If that means getting up ten minutes earlier so that you have time to pick an outfit that makes you feel strong and attractive, do it! Personally, I’m guilty of defaulting to â€Å"what’s clean and readily available as I scramble to get ready?† and I always feel more ready to take on the world if I spend a little more time and wear what I want, rather than what’s easy.16. Be selective about who you spend time with.Your time is valuable, so you shouldn’t spend it with people who make you feel bad, or who ar e (quite frankly) a waste of time.17. Stop putting everyone and everything else first.Your career is the most important one (and mine is for me, and Aunt Sally’s is for her.) Whenever you make decisions, it’s fine to evaluate your needs and priorities above others.18. Live in the present.It’s so easy to get caught up in what happened back then, or what’s likely to happen in the future. Focusing on other times let’s self-doubt creep in about what you’re doing now. Try to stay focused on what’s directly in front of you.19. Speak your mind.This doesn’t mean brutal honesty all the time (as fun as it would be to remove all filters sometimes), but rather speaking up when you have something to contribute. Whether it’s in a meeting or a social occasion, don’t wait for the perfect moment to speak up- that moment may never come. Make your voice heard, even if you’re expressing an unpopular or dissenting opinion.20. F orgive yourself.The most important one is this: forgive yourself for mistakes, and move on. Getting caught up in a cycle where you blame yourself, and let that cause anxiety about how to act in the future is not a healthy place to be. Confident people know that stuff happens, and you learn from it and move on to the next thing. If it’s your fault, acknowledge that you’ll learn from it and do better next time, and let it go.All of these are things that you can start phasing in to your daily routines. There’s no need to overhaul your way of seeing the world- just adding in some practices that will help you get a stronger sense of yourself and your goals. That’s really the heart of confidence- knowing where you want to go, and the strengths you have in trying to get there.

THE MOST SEVER THREAT WE FACE TODAY IS WATER SHORTAGE,DISCUSS Essay

THE MOST SEVER THREAT WE FACE TODAY IS WATER SHORTAGE,DISCUSS - Essay Example Instead, it signifies the increasingly growing problem of lack of potable water supply for the inhabitants of the world. With the sources of clean water dwindling and becoming harder to come by with each passing day, a severe water shortage in the future, possibly towards the middle of this current century, is seen by many experts as the most severe threat that we face as a member of the world population today. With our ever ballooning world population, our society is currently facing a problem in terms of finding and developing sustainable water sources that can help extend the current life cycle of our water sources. Climate change is fast drying up the liquid that can be found in our usual supply points such as rivers and oceans. It is believed that the worlds biggest rivers -- the Ganges Indus Brahmaputra, Yangtze Mekong, Salween, and Yellow rivers may be totally dried up by the year 2035. Such an event will have a direct effect on the world's biggest continent and could very wel l cause a chain reaction of natural calamities such as wild fires, hunger and famine, social conflict, war, and diseases 1. Global warming has turned our water supply situation into a terrifying reality that in the United States alone, the data sheets indicate that more than one third of the countries in the lower 48 will have to deal with a water supply shortage by mid century. This while more than 400 other countries will also have to deal with the international water supply shortage caused by global warming 2 (NRDC â€Å"Climate Change, Water and Risk†). Recent studies by the United Nations have clearly indicated that the water supply shortage that our world is currently experiencing has directly affected the lives of more than 1.2 billion people, approximately a fifth of the world's population 3 (United Nations â€Å"International Decade for Action 'Water for Life' 2005-2015†). This dire situation has become a reality due to the fact that there are quite a number o f countries that lack the necessary abilities with which to be able to harness the water streaming directly from rivers and aquifers. There has been a notable increase in the need for water in the 21st century stemming from agricultural needs for food to construction requirements for the building of homes and other necessary infrastructure for the survival of mankind. These heavy water requirements of our population has led to the twofold increase in the water requirements of the world's population. That is why although the world wide water shortage does not exist at the moment, there are still parts of the world that find themselves constantly lacking in water supply for their region. Keeping in mind the aforementioned facts about the way that we as a society use our existing water supply, it becomes easier to understand the causes of the water supply that we experience at one point or another in our lives. As human beings, we have begun to take our water supply for granted simply because we were told that our planet of composed mostly of water. It became a logical conclusion for us that since our planet is composed of 80 percent bodies of water at the very least, then we would not run out of water to supply our life sustaining requirements. Man has abused the water supply

Managing People and Organizations and Changing Business Scenario and Coursework

Managing People and Organizations and Changing Business Scenario and Management Practices - Coursework Example There are different approaches and perspective of management however management is about planning, organizing, leading and controlling to ensure that the organizational objectives are achieved. The task of managers is not only to ensure that organizational objectives are achieved, but it is the responsibility of the management to make sure that the motivation level of employees is high (Glueck, 1980). There is vast scholarly evidence suggesting that the theory of management came after the Second World War.; and its basic in-depth study has begun ever since. But the concept, in essence, started after the Industrial Revolution which brought upon mass production, specialization and seeing people a critical resource all paved way for management to viewed as a critical area of discourse. Principles of management are basic truths and the clarification between a dependent variable and an independent variable. Principles shall hathe ve a predictive or explanatory effect into it and it is muc h more deeply related to the dependent and independent variable as to whether these principles are applicable in given situation or not The rapidly changing environment along with different technological advancements, have been raising questions that the theories related to management are applicable in the current environment or not. Different researches and studies have been carried in this regard. In this report, an attempt has been made in order to understand the different management theories and their implications in the changing workplace. Managers are important for any modern organization i.e. plant managers look after machinery working properly, sales manager’s task is to build an effective sales team and formulate an effective sales strategy and a personnel manager’s job is to provide an enthusiastic, effective task, accomplishing and productive workforce (Rogg, Schmidt, Shull, & Schmitt, 2001). Managers are responsible in the organization to ensure that all the tasks are accomplished within the deadline and to complete the tasks in the most appropriate manner, they assign the tasks and manage people with the intention that the organizational objectives are accomplished properly.  

Art Comparison Essay Example | Topics and Well Written Essays - 1250 words

Art Comparison - Essay Example In this essay, it will feature more from the Museum of Modern art where the comparison between the works will be mainly based on the style, content, artistic intention and the historical context. When these aspects are explained, it gives one a deeper meaning of the work art work and you stop viewing it with a surface eye. This is because ever art work has a meaning and a source of inspiration. Art work has been used to communicate and it has more than a thousand words. It is a simpler way to communicate and it leaves a greater impact than writing so many words. It is much easier to remember an image of an art for many years than to remember a piece of written work. Though there are many types of art like singing, drama, poetry, and dancing, this essay will be focusing on painting and sculpture arts. Most of the paintings were done using oil because oil was resistant to water, it was readily found, was flexible enough to take different shapes and colors. Therefore, this paper look at the comparison between Lucky Strike by Stuart Davis and OOF by Edward Ruscha artistic works and Marilyn Monroe, I by James Rosenquist and Woman, I by Willem de Kooning in this essay. Luck Strike is a painting that was done by Stuart Davis. Stuart Davis was an American who was passionate about art. This art can tell that the artist was appreciating the tobacco company in America. It also shows that he loved the products from his own country.2 It was during 1921 that the tobacco the top most products in America that Stuart Davis came up with this art as a gift to the American Tobacco Company. OOF was done by Edward Ruscha in the year 1962 but he refined it in 1963. It was a gift of Agnes Gund. â€Å"I was interested in monosyllabic word sounds that seemed to have a certain comedic value to them†, Ruscha said. He was in a joyful mood when he was designing this art and he wanted to pass the

Comparing The Contrast Of Blakes Songs English Literature Essay

Comparing The Contrast Of Blakes Songs English Literature Essay William Blake was born in, London, England on 28 November 1757, he was born to a middle-class family and was the third child of seven children, two of whom died in childhood. William did not go to school, and was educated by his mother at home William Blake displayed a bright imagination at a young age, which was not looked upon positively during the pre Romantic period. He continued throughout his writing to drastically question faith and politics. His parents knew enough of his stubborn character. He enthusiastically read on subjects of his own choosing. During this time, Blake was also making explorations into poetry. On August the fourth 1772, Blake became apprenticed to engraver James Basire, for seven years. At the end of this period, at the age of 21, he was to become a professional engraver On October the eighth 1779, Blake became a student at the Royal Academy in Old Somerset House, while his study required no payment; he was expected to bring in his own materials during the six-year period. Blake met John Flaxman in 1782, who was then to become his supporter, and Catherine Boucher, who was later on, to become his wife. Blakes marriage to Catherine remained close and loyal until his death. She helped him to colour his printed poems while he taught her how to write, In this assignment I will compare and contrast three of Blakes poems from the songs of innocence and three poems from the songs of experience, I will comment on the context, themes and Blakes craftsmanship. In Blakes poems many poems fall into pairs Songs of Innocence and Songs of Experience they both have opposing perspectives of the world, Most of the time Blake is trying to show us how experience corrupt innocence. The first two poems I will be comparing is Infant Joy and Infant Sorrow Blake wrote the song The Chimney sweepers song of innocence and The chimney sweepers song of experience from totally different perspectives William Blakes wrote the poem The Chimney Sweepers in 1789, the poems tells the story of what happened to many young boys throughout this time. Boys were sold at very young age for the purpose of cleaning chimneys. These children were exploited and lived a very terrible life. Songs of Innocence and Songs of Experience both protests the living conditions and the overall treatment of young chimney sweeps The innocence version of the poem consists of six four line stanzas. The poem starts with a depressing tone telling us from the Childs perspective that before he had even learnt to speak his parents had sold him My father sold me while yet my tongue could scarcely cry. In the songs of innocence boys innocence does not allow him to not understand the social injustice and unlike the experience version where the boy in the poem sees the unfairness and is able to speak against it. The songs of Experience version consists of three four line stanzas. The poem starts of with the line A little Black thing among the snow this suggests the Boy feels lonely and depressed, the boy also does not have trust in god and feels that he has lost his purpose this shown when he says Where are thy mother and father, say? They are both one up to church to pray The Boy also Blames his parents for making him do this work, this is shown here Because I was happy among the heath and smiled against the winters snow, they clothed me in the cloth of death, and taught me to sing the notes of woe this shows that the boy was joyful until his parents sold him The Nurses Song tells a tale of a Nurse who is looking over some children playing in the field. However the experience version differs form the innocence version in the Experience version it is more bitter than the innocence version, it shows a nurse that is jealous of the children and is cruel. On the other hand the innocence version shows a nurse that does not mind the children playing, it also seems as if she is enjoying watching the children play this I shown at the very first stanza where she says When Voices of children are heard on the green and the laughter is heard on the hill, My heart is at rest within my breast and everything else is still. Whereas in the Experience version in the first stanza the nurse says that When voices of children are heard on the green and whips rings are in the dale, my face turns green and pale this could suggest that the nurse is an old nurse with a lot of experience from life. In the last stanza the nurse says Your spring and your day are wasted in play, and your winter and night in disguise this shows that the nurse is weighed down by lifes experience. In the experience version we do not see a lot of colors, unlike the innocence version where Blake paints a childrens drawing in the readers mind. He also uses very smooth language for example instead of saying the sun goes down it is said till the light fades away In the Poem Infant joy songs of innocence Blake s showing us a two day old child that is happy to arrive to the world. Blake creates a lot of joyful Images in the readers mind, He does that by only adding positive language in his poem, for example the word joy is repeated seven times in the poem. The language that Blake uses when the child talks is also uncomplicated and simple, the poem has two stanzas and is a bit rambling we also see that the mother witch has experience is positively reflecting on the two day old who represents innocence On the other hand Infant sorrow from the songs of experience the child feels he is unwanted and that he doesnt belong to this world we learn that when in the first stanza when he says My mother groaned and my father wept We also learn the child is struggling Struggling in my fathers hands striving against my swaddling bands, the child also feels discarded this is shown when he say bound and weary I thought best to sulk upon my mothers breast. Helpless, naked piping loud this could suggest that Blake is talking about the industrial revolution and that the world is becoming to dangerous for next generations, in the second line the child also says Into the dangerous world I leapt In all of Blakes poems he tries to tell us that everyone was born innocent and that lifes experience that forced the us into something good or bad and that lifes experience took away the innocence of youth. Most of his poems illustrate that belief

WWI causes Essay -- World War 1 I One

History Term paper What one thing do you think caused WW1? There in fact were many causes of WW1. One of the causes was imperialism. There was jealousy between the countries because some had more colonies then others. The major countries did not trust each other or get along. They were worried about the build up of each others army. Each country had great pride and nationalism. By 1914 all major countries had taken sides against one another and formed alliances. The immediate cause of WW1 was the assignation of the heir to Austria-Hungary’s throne. At the beginning of the war all countries were enthusiastic about it especially Germany. The countries were divided onto sides like so; Germany, Austria-Hungary and Bulgaria. These countries were the central powers. There were also the allies who consisted of Great Britain and colonies, France and Russia. Others got involved eventually. Each country had their own strategy and their own strengths. For example: Great Britain had the strongest navy and Germany had the strongest military. Their strategies were different too, like Germany’s strategy failed because they under estimated Belgium’s army. The battle took longer then they thought. They originally were supposed to defeat Belgium and France quickly so they could fight Russia on the eastern front. Even though Germany’s war plan failed they still ended up dominating most of the war before the Americans arrived. It ended up to be a naval race of who could build their navy the quickest.   Ã‚  Ã‚  Ã‚  Ã‚  When Russia first came into the war they were starting to dominate. They were going through a lot of trouble within their own country because they had a huge population and not enough resources because the land was frozen. The idea of the country going to war lit a certain spark and nationalism and pride through out the country. Russia going to war actually made them respect their leader Tsar Nicholas II. It was the first decision the Tsar made that the people agreed with. The first few battles they won and the word spread through out Russia and Europe that Russia’s army was unstoppable. This quickly changed and Russia started to loose everywhere. The Russian army started to get wiped out by the thousands. They were being defeated by Germany and other countries everywhere they went. A feeling of uncertainty grew through out the Russian people wh... ... to blame for the war. They believed the only way they can be safe from Germany is if they strip Germany for their wealth and armed forces. The allies made the Treaty of Versailles which stated: Germany pays thirty three billion to France, Belgium and Great Britain; they loose all colonies, loose land to create Poland and Alsace and Lorraine goes back to France. They are limited to an army of one hundred thousand along with no tanks, no u-boats and no airplanes. Germany is never to make an alliance or union with Austria. The Rhineland is to be a demilitarized zone and the French will take control of coal mines and rich industries of the Saar region.   Ã‚  Ã‚  Ã‚  Ã‚  When the war first started all countries were anxious to fight. When the Great War ended in 1918 no one wanted to think or even speak of war again. Millions of people were slaughtered and killed, people lost their friends and families. The war took longer then expected and by the end all countries were tired and worn out, had problems of their own and lost a lot of money and land that was put into the war. The countries agreed never to have a war again. Little did they know this was only the first one.

The Attic

My task had been set and so with trepidation, I gingerly climbed the ladder that led to the attic. I balanced on the top rung of the ladder and flung open the trap door. The door crashed against the diirt blackened floorboards loudly. The musty smell hit me, as a flurry of the dust cascaded onto my head. I carefully levered myself up onto the floor above me. I looked around the peculiar room to see beckoning shadows on the walls, as daylight tried to filter through a worn curtain, which graced the solitary window in the room. I stumbled forwards in the half-light, my outstretched hands grabbing a low beam to steady myself. The wood felt gritty and cold beneath my fingers and I looked at my hands, which were now blanketed in grime. I walked carefully to the end of the large attic room, and drew back the faded red velvet curtain, which stretched across the tiny window. The light violated the darkness, and dispelled the gloom. The room was now really quite entrancing, the task of cleaning the room, which I had initially perceived to be a horrible chore, had now turned into a beautiful privilege. I gazed at the room that was cluttered with memorabilia of a bygone era. Under the window stood an oval, walnut coffee table. On its dusty and worn surface stood several ornaments. I bent down and carefully picked up a grey figurine. I blew on it and the dust flew away. It was a white porcelain statuette that I now held; it was a delicate figurine of a ballet dancer. The ballerina was with her slender raised arms stood on points and her beauty contrasted with her shabby surroundings. I gently and with reluctance placed her back on the table I looked over the walls. They were painted yellow once, but now they were a dull cream. I walked over to the wall and ran my hand over the rough surface a thick layer of dust lay on my hand. Disgusted, I wiped my hand against my thighs of as I had worn my old jeans. The wall now had a small track of where I had removed the dust, a light yellow contrasted against the tedious cream. I looked up to see the spiders crawl over the beams, they were now the current tenants of this once beautiful place. The webs spread across from one corner of the room to the other. I lowered my eyes and my gaze met a picture that hung askew on the shabby wall. It was a painting of a horse, with a glossy deep brown coat that stared back at me. I looked at the surroundings in the picture, with its familiar red bricks and rose bushes, and I recognised it, as my back garden. I approached the painting to get a better look and screwed into the wooden frame was a brass plaque engraved with ‘High Princess- 1843'. I smiled and diverted my attention the double pushchair that seemed so out of place, as antiques surrounded it. I recalled the days of when I was once sat in the double pushchair with William, my brother. Memories flew back to me, memories of sitting there with ice cream trickling down my chin, as Will and I happily watching the world go by. Now it stood there, the navy blue material paler and worn, the once polished metal now rusted but the memories are as vivid as yesterday. I stood to exit, and the floorboards creaked beneath my feet, footprints left from where I had been inspecting the ornaments that lay in the room. I headed towards the trapdoor to go and inform my parents on what I had found in our now amazing attic. But something caught my eye, a small jewelry box. I was drawn to it; I walked towards it and picked it up. It was an ornately carved rosewood box from India. I opened the box carefully to reveal a green velvet lined interior. Inside laid unusual pieces of jewelry. I held an emerald necklace, the heavy strange jewel amazed me by its rich deep colour. I placed it carefully back down on its velvet cushioning to pick up another piece of jewelry. A ring. A ruby lay in its centre; I love rubies, as they are my birthstone and had to remind myself to ask Dad if I could have it. Once again, I replaced it. I looked out of the small window that lay behind me and saw that the sun was beginning to get low. I had to leave this room, which had intrigued me for hours. I knew I would return and I knew that at my next visit there would be even more revelations awaiting me.

Manhattan Project essays

Manhattan Project essays "Nor do I take into account a danger of starting a chain reaction of a scope great enough to destroy part or all of the planet ... But it is not necessary to imagine the earth being destroyed like a nova by a stellar explosion to understand vividly the growing scope of atomic war and to recognize that unless another war is prevented it is likely to bring destruction on a scale never before held possible, and even now hardly conceived, and that little civilization would survive it." Albert Einstein Since the beginning of time men have found cause to go to war with one another. War has built nations into great powers while bringing others to great ruin. Because of the threat of war, and the possibility of being conquered, countries put great importance on the strength of their military. In an attempt to gain the edge against their enemies they constantly try to have the most effective weapons so they can inflict the most possible damage on the opponent while minimizing their own damage sustained. New weapons have revolutionized the state of warfare throughout history, and caused great concern. For example, there was widespread concern with the advent of the crossbow in the Middle Ages; an untrained peasant was now able to kill a knight who had been trained in the art of warfare his entire life. The crossbow changed the way battles had to be fought. There have been many new weapons of war that have been so influential that they have changed the way wars were fought. Ho wever, no weapon in history has been as influential as the nuclear bomb developed by the United States in 1945. While other revolutionary new weapons might turn the tide of battle and may even cause entire countries to be defeated, if two countries ever became involved in a full scale nuclear war, the world would end as we know it. In 1939 the world was on the brink of war. Germanys war machine was on the move and its best and brightest scien...

Wireless Elecricity Essays

Wireless Elecricity Essays Wireless Elecricity Essay Wireless Elecricity Essay Niharika Sharma Applied Electronics and Instrumentation Engineering, [emailprotected] com Varun Pachauri Electronics and Communication Engineering, [emailprotected] com Wireless Electricity Abstract- The present paper intends to link several disciplines in an attempt to describe the concept of wireless electricity. Wireless transmission is useful in cases where interconnecting wires are inconvenient, unaffordable, expensive, hazardous, unwanted or impossible. A large part of the energy sent out by the generating plant must arrive at the receiver to make the system economical.Some common forms of wireless electricity transmission methods are Direct Induction followed by resonant magnetic induction, electromagnetic radiation  in the form of  microwaves  or  lasers. With this technology we can reduce power losses produced through wired lines. Different concepts and application of wireless power transmission are discussed in this paper. Introduction The definition of Wireless Pow er Transmission is: efficient transmission of electric power from one place to another through vacuum or an atmosphere without the use of wire or any other substance.Maxwells theory of electromagnetism, published in 1865 mentions electromagnetic waves moving at the speed of light, and the conclusion that light itself was just a wave. In 1886 H. Hertz performed an experiment with pulsed wireless energy transfer. . He produced an apparatus that generated and detected microwaves in the UHF region. Tesla also performed experiments in the field of pulsed wireless energy transfer in 1899. Teslas Magnifying Transmitter, an early type of Tesla Coil that measured 16 meters in diameter, could able to transmit tens of thousands of watts without wires.In present electricity generation system we waste more than half of its resources. The transmission of power without wires may be one idle alternative for electricity. Future suitable and largest application of the WPT via microwave is a Space Sol ar Power Satellite. History of Wireless Electricity In 1864, James Maxwell predicted the existence of radio waves by means of mathematical model. In 1884, John Poynting realized that the Poynting Vector would play an important role in quantifying the electromagnetic energy.In 1888, bolstered by Maxwells theory, Heinrich Hertz first succeeded in showing experimental prove of radio waves by his spark-gap radio transmitter. The prediction and prove of the radio wave in the end of 19th century was start of the wireless power. The Raytheon Company performed the first successful WPT experiment in 1963. In this experiment power was transmitted with a DC-to-DC efficiency of 13%. The Raytheon Company also demonstrated a microwave-powered helicopter in 1964. In 1975, Jet propulsion lab of NASA carried out an experiment and demonstrated the transfer of 30 kW over a distance of 1 mile.This test demonstrated the possibilities of wireless energy outside the laboratory. Rockwell International and David Sarnoff Laboratory operated in 1991 a microwave powered rover at 5. 87 GHz. Three kilowatts of energy was transmitted and 500 watts was received. In 1980s, Japanese scientists developed the MPT technologies and research. In 1983 and 1993, Matsumoto’s team carried out the first Microwave Power Transmission experiment in space. The rocket experiment was called Microwave Ionosphere Nonlinear Interaction experiment i. . MINIX in 1983 (Fig. 1) and International Space Year – Microwave Energy Transmission in Space in 1993, respectively. They focused nonlinear interaction in between intense microwave and plasmas. In this experiment, they used cooker-type 800W-2. 47GHz magnetron for microwave transmitter. New wave-wave-particle interaction phenomenon was observed in this experiment. Plasma theory and computer experiments also supported the observations. Figure 1. MINIX Rocket experiment in 1983 Technologies for Wireless ElectricityThe modern ideas are dominated by microwa ve power transmission called Solar power satellite to be built in high earth orbit to collect sunlight and convert that power into microwaves, then beamed to a very large antenna on earth, the microwaves would be converted into conventional electrical energy. A microwave transmission system consists of three essential parts: ? Electrical energy to microwave energy conversion ? Absorption antenna that collects the waves ? (Re)conversion to electrical energy Figure 2. Microwave transmitter and rectennaThe microwave source consists of a microwave oven magnetron with electronics to control the output energy. The output microwave energy ranges from 50 W to 200 W at 2. 45 GHz. A coaxial cable connects the output of the microwave source to coax-to-waveguide adapter. This adapter is connected to a waveguide ferrite circulator which protects the microwave source from reflected energy. The circulator is connected to a tuning waveguide to match the waveguide impedance to the antenna input impe dance. The slotted waveguide antenna consists of 8 wave guide sections with 8 slots per section.These 64 slots radiate the energy uniformly through free space to the rectenna. The slotted waveguide antenna is ideal for energy of its high aperture efficiency (;gt;95%) and high power handling capability. A rectifying antenna called a rectenna receives the transmitted energy and converts the microwave power to direct current (DC) power. This rectenna consists of 6 rows of dipoles antennas where 8 dipoles belong to each row. Every row is connected to a rectifying circuit which consists of low pass filters and a rectifier. The rectifier is a Ga As Schottky barrier diode i. . impedance matched to the dipoles by a low pass filter. The 6 rectifying diodes are connected to light bulbs for indicating that the energy is received. The light bulbs also dissipated the received energy. This rectenna has a 25% collection and conversion efficiency, but rectennas have been tested with more than 90% e fficiency at 2. 45 GHz. Another possibility is to use highly efficient fibre lasers for wireless energy transmission where the possibilities are similar to microwaves concept but lasers emit energy at frequencies much higher than microwave.For several years NASA, ENTECH, and UAH have been working on various aspects of collection of the laser radiation and conversion to electrical energy for laser wireless energy transmission. Figure 3. Two optical forms of wireless antenna formed of search light beam-ionised atmospheric stream Applications of Wireless Electricity Wireless Power for Space Solar Satellites * The largest application for microwave power transmission is Space Solar Power satellites. In this application, solar energy is captured in space and converted into electricity.The electricity is converted into microwaves and transmitted to the earth. The microwave energy will be captured with antennas and converted into electricity. NASA is still investigating the possibilities of solar power satellites. Main problem is the high investment cost due to the space transport. The current rates on the Space Shuttle run between $7,000 and $11,000 per kg of transported material. * Table. 1-Parameters for transmiting antenna for sps system * Figure. 4. Space Solar Power Satellite Power Supply for Rural AreasWireless power can be an option for power supply to rural areas. In 1993, a project presented about wireless power supply in Alaska. Because of limited infrastructure, numbers of small rural communities in Alaska must provide their own electricity. These systems can be expensive or just not available. At the moment, the small communities produce their own power with mostly diesel engines. These produce so noise and pollution. Also the required fuel has to be transported over long distances. This results in an electricity price in excess of $40/kWh.In Alaska cable connections through water is no alternative because of ice. With the help of WPT, the required power production of the communities can be combined. It can reduce noise, pollution and transportation of fuel. WPT may be capable of transmitting electrical power to Alaska’s remote villages. To investigate these possibilities, a project was conducted named Alaska21†. System used for the project consisted of a 2. 46 GHz phased array design. The distances should be bridged are between 1 and 15 miles. Figure. 5. Alaska’21 * V.Merits of Wireless Electricity An electrical distribution system, based on this method would eliminate the need for the costly and capital intensive grid of cables, towers, and substations. The system would also reduce the cost of electrical energy used by the consumer and rid the landscape of wires, cables, and transmission towers. There are areas of the world where the need for electrical energy exists, yet there is no method for delivering energy. Africa is in need of energy to run pumps to tap into the vast resources of water under the Sahara D esert.Rural areas, such as those in China, require the electrical energy necessary to bring them into the 20th century and to equal standing with western nations. The wireless transmission will solve most of above problems. The electrical power can be economically transmitted without wires to any terrestrial distance, so there will be no transmission and distribution loss. Figure 6. An office using wireless electricity Demerits of Wireless Electricity A common criticism of the wireless power system is regarding its possible biological effects.Calculating the circulating reactive power, it was found that the frequency is small and such a frequency is very biologically compatible. A general perception that microwaves are harmful has been a major obstacle for the acceptance of power transmission with microwaves. One major concern is that the long-term exposure to low levels of microwaves might be unsafe and even could cause cancer. Conclusion The transmission of energy without wires is not a theory or a mere possibility, it is now a reality. The electrical power can be economically transmitted without wires to any terrestrial distance.Many researchers have established in numerous observations and experiments qualitative and quantitative. It is clear that wireless power transmission systems in the range of 100 W to 100 kW to cannot compete with traditional systems just looking at the costs. At those places where economic competition is not the prime consideration, it can be an option. Microwave wireless energy transmission can supply energy to those places that are difficult to reach. Especially small communities in rural areas could be supplied with power using wireless power transmission.The problems of a possible lack of energy during the next fifty or hundred years could be solved by the Space Solar Power Station. The system would reduce the cost of electrical power used by the consumer and get rid of the landscape of wires, cables, and transmission towers. It has negligible drawbacks like reactive power which was found insignificant and biologically compatible. References James O. McSpadden, â€Å" Wireless Power Transmission Demonstration†, Texas Aamp;M University, June, 1997. Elvina Finzi, Carlo Lombardi, and Leopold Summerer. A lunar IPWR: A pre-feasibility study. In IAC 2006, volume IAC-06- D2. 8. , Valencia, Spain, Oct. 2006. IAF. Thomas W. Benson, â€Å"Wireless transmission of power now possible†, News Letter, pp1118 – 9, March, 1920. Charych Arthur (Setauket, NY), â€Å"System and method for wireless electrical power transmission†, Patent No. 6,798,716, September 28, 2004. Joe T. Howell, et. al, â€Å"Advanced receiver / converter experiments for laser wireless power transmission†5th. Wireless transmission conference, pp 1-8, Garanda, Spain, 2004. Nikola Tesla, â€Å"The true wireless†, Electrical Experiment, May, 1919. Toby Grotz,† Wireless transmission of power†, Courtesy o f the Tesla BBS at 719 486-2775, August 28, 1990.Cheney, Margaret (1999), Tesla Master of Lightning. Health and safety issues for microwave power transmission, John M. Osepchuk, Solar energy Vol. 56, 1996 The results of NASA Fresh look at the feasibility of Space Solar Power, John C. Mankins, 1997. Nicola Tesla. The transmission of electrical energy without wires. Electrical World and Engineer, March 1905. Sang, L. C. K. , A. Celeste, and J-D. L. S. Luk, â€Å"A Point-to-Point Terrestrial Wireless Power Transportation Using an Injection-Locked Magnetron Array†, Proc. of Millennium Conference on Antennas amp; Propagation, 2000, p. 87 Tahir, I. , A. Dexter, and R. Carter, â€Å"Phase Locked magnetrons by use of their pushing characteristics†, Proc. of Sixth International Vacuum Electronics Conference IVEC2005, 2005, pp. 65-68 Shinohara, N. , T. Mitani, and H. Matsumoto, â€Å"Development of Phase and Amplitude Controlled Magnetron†, Proc. of Sixth International Va cuum Electronics Conference IVEC2005, 2005,pp. 61-64 Shinohara, N. , H. Matsumoto, and K. Hashimoto, â€Å"Phase-Controlled Magnetron Developmentfor SPORTS : Space Power Radio Transmission System†, The Radio Science Bulletin, No. 310, Sep. 2004, pp. 9-35 Granatstein, V. L. , P. K. Parker, and C. M. Armstrong, â€Å"Scanning the Technology: Vacuum Electronics at the Dawn of the Twenty-First Century,† Proc. IEEE, vol. 87, 1999, pp. 702–716 Heider, S. , â€Å"The Commercial Space TWTA Market Review and Trends†, Proc. of 1997 ESA Workshop, 1997, pp. 63-68 Sivan, L. , â€Å"Microwave Tube Transmitters – Microwave Technology Series 9-â€Å", Chapman amp; Hall, 1994 Matsumoto, H. , â€Å"Research on Solar Power Station and Microwave Power Transmission in Japan : Review and Perspectives†, IEEE Microwave Magazine, December 2002, pp. 36-45

Economics Essay Example | Topics and Well Written Essays - 1250 words - 9

Economics - Essay Example Economics as an existing discipline which relies on meticulous argument styles. Its objectives cover the formulation of theories that have more sound theoretical grounding and are simpler in the manner of explaining economic phenomena. Frequently the explanation starts with a plain framework which depicts the relationships of the variables . The complexities are locked away in the assumption of ceteris paribus or all equality of all other variables. An example is moneys quantity theory , which posits a positive assocoiation among the money supply and price level, ceteris paribus. The theory can be put to test by utilizing economic data, like the price index of GDP and a calculation of the supply of money; for example, bank deposits along with currency. Its quantitative methodologies facilitate the impact of opposing rationalizations and challenge to fine-tune for extraneous effects. Of late, the utilization of experiments on economics has been very progressive; thus making it compara ble to the natural sciences. Microeconomics examines the agents economic performance as well as firms and individuals, their connections through the given insufficiency, character markets and administration guideline. For a product there is a market specified, for instance a corn which is a factor of manufacture called bricklaying. Aggregating of the amount required by buyers and the number provided by sellers at each probable unit price is measured by the theory. It weaves these together to explain how an advertise may arrive at the equilibrium as to the amount or price that responds to the market change over the time. Demand-and-supply analysis is the general termed. Market structures such as domination and perfect competition is examined which is implied as a financial competence or behavior. The proceeds remains unchanged based on the analysis from the simplifying statement that behavior in the market it is the so

Using ICT When Presenting a Research Project Essay

Using ICT When Presenting a Research Project - Essay Example With reference to ICT, its aim while presenting or preparing a research project is given below: ICT endures the capability to transcend time as well as space at anytime and anywhere. Its presence makes it probable to initiate asynchronous learning. Availability of the materials and relevant information becomes possible for 24 hours on a particular day and 7 days in a particular week. Advanced techniques of ICT for instance teleconferencing enables the instructions to be acknowledged concurrently to numerous learners who are disseminated geographically (Mehta & Kasnia, 2011) †¢ With the advent of ICT, it has become easier to have access to the required information related to a research project at any time. Hence, the dependence on the availability of books, materials and physical media such libraries has decreased (Kirkwood & Price, 2005) Application of the techniques used in ICT while researching a project helps in gathering the current and latest information from the online sources. With respect to global market scenario, the effective application of ICT helps in the sustainability within the competitive market scenario (Sustainable Development Solutions Network, 2013) With the advent of emerging features incorporated with ICT, numerous ethical issues are rising within the modern day scenario.... With respect to global market scenario, the effective application of ICT helps in the sustainability within the competitive market scenario (Sustainable Development Solutions Network, 2013) Ethical Considerations Related to the Use of ICT While Presenting a Research Project Along with Outlining Ways of Addressing Them With the advent of emerging features incorporated with ICT, numerous ethical issues are rising within the modern day scenario (Omogbadegun, 2010). ICT is a combination of the information and the communication facets, thus the combination of the two results in convergence, portability and personalisation. With respect to convergence, it reflects the multiple uses of ICT. Portability reflects mobility of the technical devices anywhere such as tablets and smartphones. Information created accordingly with respect to the preferences reflects the terminology personalisation (Tan, 2002). Ethical issues encompass privacy, property, accuracy and accessibility. ICT is pervasive a s it touches every aspect of an individual’s life (Salvi, 2011). Issues related with the use of advanced techniques are termed as technology manipulation. With the advent of modern technologies, there has been a considerable rise in ethical issues as well. Sound, video and photo manipulation has augmented significantly in the modern day scenario. Morphing is the term that is widely used for photo manipulation (Salvi, 2011). Source: (Slide Share, 2013) The above pictorial representation reflects an example of photo manipulation. In order to address such a critical ethical issue, effective measures and technologies must be implemented to reduce the ethical issues related to the ICT. Moreover, there should be a proper blockage with