The Doppler Effect Essay - 487 Words

The Doppler Effect Christian Johann Doppler, born November 29, 1803 in Salzburg, Austria died March 17, 1853 in Venice. Christian Doppler an Austrian Physicist who first described how the detected frequency of light and sound waves is affected by the relative motion of the source and the detector. This aspect became known as the Doppler Effect. Christian was educated at the Polytechnical Institute in Vienna. Doppler became director of the physical Institute and professor of experimental physics of the University of Vienna in 1850. In 1842 he published Uber das farbige Licht der Dopperlsterne which means Concerning the Coloured Light of Double Stars, which contained his first statement of the Doppler effect. He then†¦show more content†¦And if the light is moving towards you then the light becomes bigger, and brighter. Another example of this is if you ever drove in a car at night you can see a car from far away but the headlights of the other car look like they are more seperated apart. And as the vehicle moves closer to you, the lights seem that they are getting closer together. What happens to a pitch or frequency when the source is moving towards the person or away from him/her? It has been established from sound waves that the frequency is higher when a sound source is moving toward the person and lower when it is moving away from him/her. Another example of the Doppler effect is the way a police cars siren changes in pitch when it passes by. The sound waves in front of the car are condensed, while the trailing sound waves are longer and of a lower pitch. Light fr om an object moving towards the Earth is shifted toward the blue end of the spectrum, where as light from objects moving away is shifted toward the red end. The human ear cannot hear all possible frequencies. Very few people can hear any fewer than 16 Hz or any more than about 20 kHz (kilohertz--1 kHz equals 1,000 Hz). Music rarely makes use of this whole range of audible frequencies. The lowest note on a piano has a frequency of 27 Hz and the highest note a little more than 4 kHz.Show MoreRelatedDoppler Effect2322 Words   |  10 PagesDoppler effect The Doppler effect, named after Christian Doppler, is the change in frequency and wavelength of a wave as perceived by an observer moving relative to the source of the waves. For waves that propagate in a wave medium, such as sound waves, the velocity of the observer and of the source are relative to the medium in which the waves are transmitted. The total Doppler effect may therefore result from motion of the source, motion of the observer, or motion of the medium. Each of theseRead MoreRelativistic Doppler Effect and the Misunderstandings of Special Theory of Relativity815 Words   |  4 PagesThe present paper discusses the relativistic Doppler effect and tries to found misunderstandings in the present state of the Special theory of relativity. The authors conclusion that he found some â€Å"blue shift† which contradicts with time dilation is wrong. The weakest feature of the paper is that although the formulas, presented by authors, are in general correct, but they do not support the conclusions the author extract from them, and mistake is hidden in the interpretation. Lets focus on theRead MoreSpeed Detection of Moving Vehicles Using Doppler Effect2854 Words   |  12 Pages| SPEED DETECTION USING DOPPLER EFFECT AND RADAR | | | INTRODUCTION Although there is good road safety performance the number of people killed and injured on our roads remain unacceptably high. So the roads safety strategy was published or introduced to support the new casualty reduction targets. The road safety strategy includes all forms of invention based on the engineering, education and enforcement and recognizes that there are many different factors that lead to trafficRead MorePrinciples of Physics in Ultrasound Essay1717 Words   |  7 Pagesabout 20kHz when the sound is no longer audible and above the frequency disturbance, this is know as ultrasound. The first major breakthrough in the evolution of high frequency echo-sounding techniques came when the piezo-electric effect in certain crystals was discovered by Pierre and Jacques Curie in Paris in 1880. The turn of the century saw the invention of the Diode (component that restricts the direction of movement, allows an electric current to flow inRead MoreThe Principles Of Laser Doppler Flowmetry 21657 Words   |  7 PagesTable of Contents Introduction and History 1 The Principles Of Laser Doppler Flowmetry 2 Clinical Applications 4 Recent Developments 4 Glossary 5 Works Cited 6 â€Æ' Introduction and History Laser Doppler flowmetry, or LDF, is a unique way to measure the microcirculatory blood flow without a painful or invasive procedure. LDF uses the Doppler shift theory as a way to transmit the information, with the scattering of light coming from the laser by way of the red blood cells. [A, B, C] Micro-vascularRead MoreThe Importance Of Echocardiography For Clinical Practice As They Are Used For Screening, Diagnosis, And Diagnosis2604 Words   |  11 Pagesmost widely used diagnostic tests in cardiology as it is considered the safest diagnostic techniques due to no ionising radiation involved in image production. Echocardiography is based on the Principles of Wave transmission (Ultrasound) and The Doppler Effect which are considerably cheaper compared to X-ray imaging, CT, MRI, nuclear medicine and other diagnostic techniques (Cootney, 2001). In addition to cost, ultrasound cardiac imaging machines are relatively small and mobile which can also satisfyRead MoreThe Career Of A Ultras ound Technician1025 Words   |  5 Pagesrequired to become a successful Ultrasound Technician and the impact this career has on society. In 1801 Thomas Young described â€Å"phase shifting† in relation to light. Christian Doppler in 1842 created the â€Å"Doppler effect† which is how blood flows in pelvic vessels and the fetus. Pierre Curie in 1880 described the piezoelectric effect, where ceramic to generate ultrasonic waves.Paul Langevin in 1915 built the first hydrophone, microphone designed to be used to listen to underwater sound ,also related toRead MoreElastic Wave Filtering Properties Of Graded Undulated Lattices Lab Report765 Words   |  4 Pagesto strong wave attenuation over a broad frequency range. The experimental investigation of wave transmission and the detection of full wavefields effectively illustrate this behavior. Transmission measurements are conducted using a scanning laser Doppler vibrometer, while a dedicated digital image correlation procedure is implemented to capture in-plane wave motion at selected frequencies. The presented results illustrate the broadband attenuation char acteristics resulting from spatial grading ofRead MoreDoppler Ultrasound in Obstetrics Essay958 Words   |  4 Pagesnurse has a vast array of technologies that assist in establishing trust with parents during pregnancy. Doppler ultrasound is utilized during pregnancy to reassure mothers of fetal well-being. External fetal monitoring with Doppler ultrasound has limitations for fetal monitoring during labor. Technology such as the Doppler ultrasound is used to increase patient confidence in the medical field. Doppler ultrasound is a medical technology that enables antenatal monitoring, limited monitoring during laborRead MoreTaking a Look at Radar Systems680 Words   |  3 Pagescan have Doppler ambiguities. 2) Pulse Doppler radar It uses high pulse repetition frequency (PRF) to avoid Doppler ambiguities, but these radars can have range ambiguities. Continuous Wave Radar: CW radars process continuously by transmitting high frequency signal and the reflected energy is also received and further process. It ensures that the transmitted energy doesn’t leak into the receiver. It may be bistatic or monostatic, measures radial velocity of the target using Doppler Effect. Two

Emerging Three Dimensional Printing Of Modern Medicine Essay

Emerging Three Dimensional Printing in Modern Medicine The improvements made in the medical field such as surgical procedures, equipment and outcomes have been nothing but extraordinary. In this day, we have been able to experience the almost impossible medical advancements. Starting from an ancient Babylonian and a Greek physician, we are now in the verge of developing printable 3-D organs and 3-D virtual reality models of fetuses. These 3-D organs and models are an excellent source for any organ transplants, internal and external prosthesis, further experimentation on disease development and prevention, and finally, aid in assessing fetus abnormalities to prevent many other possible medical complications. All of these factors also affect the amount of reimbursement received based on the impact on medical cost such as length of surgery, type and quantity of equipment needed to perform these procedures or printings, required medical staff to assist in surgical procedure, types of med ications or therapies required after surgery and patients length of the stay. Three Dimensional printing is becoming one of the next biggest advancements in modern medicine, helping physicians and scientist achieve many more successful outcomes with their patients. At the Wake Forest Institute for Regenerative Medicine, in North Carolina, custom- build bioprinters are being perfected to achieve successful use. An object is scanned or designed using model software, that data is then sent to theShow MoreRelatedHow Digital Printing Is Revolutionize Our Modern Day Lives?1258 Words   |  6 Pagesthe future of medicine will be in the next decade? With diseases and illnesses advancing, technology has been improving and advanced innovative ways have been surfacing. Something that has modernized our way of life without even realizing it is a printer. Do you ever foresee that printers could other than put ink on a piece of paper? Three-dimensional printing is revolutionizing our modern day lives in our own selves as we speak. Although there are several types of 3D printing, one version thatRead MoreEvaluating The Future Of Medicine1508 Words   |  7 Pagesyou think the future of medicine will be in the next decade? With diseases and illnesses a dvancing, technology has been improving and advanced innovative ways have been surfacing. Something that has modernized our way of life without even realizing it is a printer. Did you ever foresee that printers could do other than put ink on a piece of paper? Three-dimensional printing is revolutionizing our modern day lives as we speak. Although there are several types of 3D printing, one version that hasRead MoreHow Scientists Can Most Efficiently Complete Organ Printing Essay2428 Words   |  10 Pagesorgan printing. In this lab, the cells will be suspended in a substrate called sodium alginate-collagen, hydrogel, and other reactants. These materials will react to then embed the cells to their goal location. Then, the cells will be able to be fixated into layers. These layers will then come together and form tissues, which according to biological organization will form organs. The inkjet bioprinter allows for this to occur. Tiny ink droplets form a digital design for the org an printing, and inRead MoreFrom Salvation to Self-Realization18515 Words   |  75 Pageshealth defined in sweeping terms. 5Of course, one could argue that there is nothing specifically historical about this therapeutic ethos. People have always been preoccupied by their own emotional and physical well-being; all cultures, ancient and modern, have probably had some sort of therapeutic dimension. But my research in magazines, letters, and other cultural sources suggests that something was different about the latenineteenth-century United States. In earlier times and other places, the questRead MoreComparative Analysis of Different Brands14052 Words   |  57 Pages50-paise. And that’s when the multinationals sat up and noticed him. But what really worked was the ‘bring empty sachets and take shampoo sachets in return’ offer. Sales zoomed from 35,000 sachets to 12 lakhs. Initially they took any sachet, but after three months they restricted to Chik sachets C) â€Å"LIBERLIZATION BOOM and STABLIZATION† STAGE POST LIBERLIZATION (1991-2000) Post liberalization not only saw higher number of domestic choices, but also imported products. The lowering of the trade barriersRead MoreImpact of Science on Society38427 Words   |  154 Pages11. Asimov, Isaac, 1920. 111. United States. National Aeronautics and Space Administration. IV.College of William and Mary. V. Title. VI. Series. Q175.55.B88 1985 303.4’83 84-1 4 1 59 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 Foreword Science and technology have had a major impact on society, and their impact is growing. By drastically changing our means of communication, the way we work, our housing, clothes, and food, our methods of transportationRead MoreImpact of Science on Society38421 Words   |  154 Pages11. Asimov, Isaac, 1920. 111. United States. National Aeronautics and Space Administration. IV.College of William and Mary. V. Title. VI. Series. Q175.55.B88 1985 303.4’83 84-1 4 1 59 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 Foreword Science and technology have had a major impact on society, and their impact is growing. By drastically changing our means of communication, the way we work, our housing, clothes, and food, our methods ofRead MoreAnnotated Bibliography: Plagiarism39529 Words   |  158 Pageswill need to quote from the work of others. However, you must make it quite clear that is what you are doing and you must give proper recognition to the original author (identifying the quotations and referencing the paper appropriately). There are three types of plagiarism. Unattributed copying from the work of others; Unattributed copying from work that you have published in the past; Patch-writing where substantial passages are taken from previous published work and slightly edited to changeRead MoreI Love Reading Essay69689 Words   |  279 Pagesentrepreneurs are graduates. However, only 16% chose a speciï ¬ c sector as a result of their educational background. Nearly one in two entrepreneurs considered skill shortages in recruitment to be a problem of average importance, while nearly one in three considered it ‘somewhat difï ¬ cult’ or ‘very difï ¬ cult’ to ï ¬ nd candidates with the right skills. More than a third of the entrepreneurs faced problems in accessing as well as retaining employees generally. 50% of the entrepreneurs experienced difï ¬ cultiesRead MoreContemporary Issues in Management Accounting211377 Words   |  846 Pagesacademic spheres in accounting, I sense that the two worlds have less and less to do with one another. It is therefore ever more important to reflect on the contributions which Michael Bromw ich has made. He played an important role in the diffusion of modern practices of capital investment appraisal in the United Kingdom. He has been constantly open to the insights which advances in economic theory can provide into the accounting art, in many areas pushing at the frontiers of international knowledge in

New Trends in the Global Business †Free Samples for Student

Question: Discuss about the New Trends In The Global Business Environment. Answer: Introduction The competition for domestic markets is intensifying, companies and organizations are being forced to go global in order to expand their operations and increase their profit margins. Globalization chance presents business leaders with additional opportunities and challenges for a viable business expansion. The International business environment is ever changing, and new aspects are emerging every day, hence forcing business organizations to be up to date in understanding the new complexities and adaptation strategies in a global market. Recent analysis from researchers about international trade has shown a shift in direction for the major drivers in the global environment each single year. Macro and microenvironment dynamics of a business are rapidly changing on a worldwide basis each year (Parker, 2008). The high level of technology is among the newest trends in the environment as it has brought new technicalities in product production, distribution, and consumption. Through technology companies can now produce quality goods and ship them to their customers effectively through new shipment tracking systems that are being developed. The time between distribution processes to the receivable of goods by the customer worldwide has been reduced too. It is also important for businesses to understand there are general expectation and responsibility of producing environmentally friendly products (Al-shamari Masri, 2016). The future of many global corporations dealing with technological goods will depend on how they contro l the environmental impacts of their products. Universal communications systems are steadily improving thus enabling smooth interactions between businesses and their end consumers all over the globe. Customers can now enquire about specifications of a given product and total price directly from their sellers. In recent years there has been an upward trajectory in social technologies as more and more people are connecting and interacting on social media platforms. Communication trends have made organizations integrate social network marketing and promotions strategy through social media interactions. These developments among international companies will force the new corporations to integrate communication systems and techniques so as to connect with their global consumers. A shift of economic power is being experienced worldwide as the developing nations are termed as better investment ground than the already grown economies (Morrison, 2011). European and western economies are seeing stagnated growth thus limiting the growth of economies and opportunities in these countries. Demand for products and traditional services are standard and have stopped growing in the most of the developed countries. Developing countries are being seen as the best avenues for investment as they are in the process of improving living standards of their citizens. This means that many organizations have opportunities to develop and present their products in these developing nations. Supply chains strategies are likely to develop where the goods will be made in the developed countries and distributed to the developing countries due to the availability of a market for ready-made products. Market expansion strategies ideas are spreading among multinational companies; this is done through the development of partnerships and buying of ownership rights of infant enterprises in these countries. Constant innovation is being witnessed all over the world where individuals are innovating products aimed at improving global consumer satisfaction and problem-solving ideas. Traditional products are being enhanced, and new products are being developed so as to meet the international standards of consumer expectations. To remain competitive at an international level companies are promoting and investing in creative and inventive individuals to their organizations. Companies left out in the competition of innovation and rebranding, especially the technology related organizations are likely to be forced out of the international market. Consumer needs, tastes, and preferences are changing rapidly hence making these organization to invest heavily in market research and promote innovative ideas so as to meet the customer's endless list of needs. Many business leaders have accepted the ideas of expansion toward the globalization strategy therefore intensifying competition in the global market. Each year more and more businesses globalize and develop their products beyond their domestic country. Over the last years the western companies were the major international players in the market. However, this has changed as Asian corporations are aggressively entering the market. Production factors such as labor in Asian and African countries are cheaper hence reflecting on the price of products offered. To compete with these cheap products western businesses are being forced to produce more quality goods, innovate aggressively and react to the markets needs faster so as to be in a competitive position (John Allen 2008). Smart machine revolution is growing at a fast rate in production companies all over the world so as to save cost of production and compete at an international level. Robots have replaced major human labor as they are now being used as receptionist, security, and as human assistants. Productions costs such as wages are significantly being cut thus helping these companies realize bigger profit margins every year. The development of this phenomenal is expected to be on the rise all over the globe as a measure of increasing profits or reducing the losses. Efficiency and effectiveness are also likely to be improved as it will help eliminate or reduce human errors. The companies practicing this strategy are however likely to pay into account the importance of human factor such as interaction and judgment attributes, therefore limiting them to the number of artificial intelligence that they have. The ever changing social demographics are posing an enormous challenge to organizations as they try to understand the consumer behavior by their age, sex, and economic class. Worldwide population is growing at a high rate while literacy and intellectual levels are improving thus pointing to a younger, working middle class in the next 10 to 15 years. The changes and development in such demographics are forcing companies to structure themselves into a given specific niche targeting a given demographic group. In a modern global market, companies are obliged to conduct serious studies on consumer behaviors on these groups all over the world. A major percentage of the world is made up of the youth thus proving the reasons why most companies are into youth related products and services (Wong, 2008). Companies involved in service provision for the older group have also experienced substantial growth due to their narrowed niche. Conclusion Business leaders have the responsibility of developing their respective business through expansion or any other product development strategies, among them include globalization of a product and presenting it to potential international consumers. Foreign markets provide new challenges, business opportunities and risks to any organization that wishes to expand its product and services internationally. Learning about new trends new opportunities and laws at international is a fundamental principle that any organization that wants to offer its services to global customers. Demographic changes, technological trends, investment prospects worldwide and innovation developments are among the key things that dictate movements in the international market. References Al-Shammari, M., In Masri, H. (2016). Ethical and social perspectives on global business interaction in emerging markets. Journal of International Business,25(6), 721-741. Czinkota, (2009). Emerging trends, threats, and opportunities in international marketing: What executives need to know. New York: Business Expert Press. John, R., Allen, M. (2008). Global business strategy. Global Business Behavior Journal,43(8), 71-74. Laudicina, P. A. (2005). World out of balance: Navigating global risks to seize competitive advantage. New York: McGraw-Hill. Morrison, J. (2011). Global Business Environment. Palgrave Macmillan. 66(9), 21-41. Parker, B. (2005). Introduction to globalization and business: Relationships and responsibilities. London: SAGE. Wong, S. 2008. Global business trends: Developments and responses. Business Education Behavior,25(6), 721-741.

The Fall Of The House Of Usher Setting Essays -

The Fall of the House of Usher: Setting The Fall of the House of Usher: Setting In the short story, "The Fall of the House of Usher," by Edgar Allen Poe, setting is used extensively to do many things. The author uses it to convey ideas, effects, and images. It establishes a mood and foreshadows future events. Poe communicates truths about the character through setting. Symbols are also used throughout to help understand the theme through the setting. Poe uses the setting to create an atmosphere in the reader's mind. He chose every word in every sentence carefully to create a gloomy mood. For example, Usher's house, its windows, bricks, and dungeon are all used to make a dismal atmosphere. The "white trunks of decayed trees," the "black and lurid tarn," and the "vacant, eyelike windows" contribute to the collective atmosphere of dispair and anguish. This is done with the words black, lurid, decayed, and vacant. The narrator says that the Usher mansion had "an atmosphere which had no affinity with the air of heaven." It was no where near being beautiful, holy, or clean. He uses descriptive words such as decayed, strange, peculiar, gray, mystic, Gothic, pestilent, dull and sluggish to create the atmosphere. Poe's meticulous choice of words creates a very effective atmosphere in the story. Another important way Poe uses the setting is to foreshadow events in the story. Roderick Usher's mansion is on example of this. There is a "barely perceptible fissure" in the masonry. It is a small crack in "The House of Usher" which the narrator defines as "both the family and the family mansion." This foreshadows an event that will ruin the house and the family. The fissure divides the house. Roderick and Madeline die, destroying the family. The narrator says there is a "wild inconsistency between [the masonry's] still perfect adaptation..and the crumbling condition of the individual stones." This is also symbolic. The stones represent the individual people of the Usher family, and the entire mansion stands for the whole family. The "wild inconsistency" makes the reader aware that something later in the story will make the inconsistency" clear or consistent. From far away, no one knows that the House of Usher is in despair. The "fabric gave little token of instability"-- or the mansion itself did not tell of the turmoil it concealed. The story takes place in autumn, a season associated with death. When the story's tension is about to reach its crescendo, a storm comes up, a "rising tempest." This is a symbol for the "tempest" brewing in Roderick Usher's mind. Poe's use of foreshadowing is just enough to clue the reader into what will happen, but not enough to give it away. Character traits are displayed through how the setting affects, influences, and reveals the characters. The narrator is affected by the gloomy atmosphere of the Usher mansion. He is "sucked in" to Usher's "dream world," the world he created after living alone in his dismal house for years. Usher's house itself is a symbol for Usher. It is isolated like Usher. There are many "intricate passages," like the many facets of his mind. One of the rooms had windows which "feeble gleams of encrimsoned light...served to render sufficiently distinct the more prominent objects around." The windows stand for Usher's eyes, the light is reality. He lives in his own world he created. Reality enters his brain only in "feeble gleams of light." "The eye...struggles in vain to reach the remoter angles of the chamber.." The reality does not reach all of his brain. These quotes show that Usher is only half in the real world, half in his own world. The books Usher read, his art, and music all reveal his personality. He played "long improvised dirges" on the guitar. The narrator describes his painting as "phantasmagoric." The books he reads are about death, magic, mysticism, the occult, and torture. His favorite is a book of vigils for the dead. All these things show that Usher is unstable and obsessed with death. Through the setting, Edgar Allan Poe is able to foreshadow events, establish an atmosphere, and reveal character traits. Although the reader may not notice all the numerous devices used, they contribute to giving the story depth. Noticed or not, Poe utilizes the setting to its' full capacity to create the mood, characters and foreshadowing.