Oscilloscope The most useful instrument

Oscilloscope The most useful instrument INTRODUCTION Cathode Ray Oscilloscope (CRO): An oscilloscope is easily the most useful instrument available for testing circuits because it allows you to see the signals at different points in the circuit. The best way of investigating an electronic system is to monitor signals at the input and output of each system block, checking that each block is operating as expected and is correctly linked to the next. With a little practice, we will be able to find and correct faults quickly and accurately. The symbol for a CRO: The screen of a CRO is very similar to a TV, except it is much simpler. We will not go into the similarities except to say that the picture tube on a TV and the screen on a CRO are both a special type of valve called a Cathode Ray Tube. It is a vacuum tube with a cathode (negative electrode) at one end that emits electrons and anodes (positive electrodes) to accelerate the electron beam up/down and left/right to hit a phosphor coating at the end of the tube, called the screen. The electrons are called cathode rays because they are emitted by the cathode and this gives the oscilloscope its full name: Cathode Ray Oscilloscope or CRO. CRO IN DETAIL The main part of the C.R.O. is a highly evacuated glass tube housing parts which generates a beam of electrons, accelerates them, shapes them into a narrow beam, and provides external connections to the sets of plates for changing the direction of the beam. Internal Components K, an indirectly heated cathode which provides a source of electrons for the beam by boiling them out of the cathode. P, the anode (or plate) which is circular with a small central hole. The potential of P creates an electric field which accelerates the electrons, some of which emerge from the hole as a fine beam. This beam lies along the central axis of the tube. G, the grid. Controlling the potential of the grid controls the number of electrons for the beam, and hence the intensity of the spot on the screen where the beam hits. F, the focusing cylinder. This aids in concentrating the electron beam into a thin straight line much as a lens operates in optics. X, Y, deflection plate pairs. The X plates are used for deflecting the beam left to right (the x direction) by means of the ramp voltage. The Y plates are used for deflection of the beam in the vertical direction. Voltages on the X and Y sets of plates determine where the beam will strike the screen and cause a spot of light. S, the screen. This is coated on the inside with a material which fluoresces with green light (usually) where the electrons are striking. As well as this tube, there are several electronic circuits required to operate the tube, all within the C.R.O. along with the tube: A power supply, operated from the 110 volt 60 cycle per second electrical mains. This supply provides all the voltages required for the different circuits within the C.R.O. for operation of the tube. A sawtooth, or ramp signal generator which makes the spot move left to right on the screen. External controls for this circuit allow variation of the sweep width, and the frequency of the sweep signal. Because of the persistence of our vision, this sweep is often fast enough that what we see on the screen is a continuous horizontal line. Amplifiers for the internally generated ramp signal, and for the unknown signal which we hook up to the C.R.O. for the purpose of displaying it. Shift devices which allow us to control the mean position of the beam; up or down, or left to right. The synchroniser circuit. This circuit allows us to synchronise the unknown signal with the ramp signal such that the resulting display is a nice clear signal like a snapshot of the unknown voltage vs. time. C.R.O. Operation: Typical front-panel controls Front Panel On-off switch. INTENS. This is the intensity control connected to the grid G to control the beam intensity and hence the brightness of the screen spots. Dont run the intensity too high, just bright enough for clear visibility. Always have the spot sweeping left to right or the beam may burn a hole in the screen. FOCUS allows you to obtain a clearly defined line on the screen. POSITION allows you to adjust the vertical position of the waveform on the screen. (There is one of these for each channel). AMPL/DIV. is a control of the Y (i.e. vertical) amplitude of the signal on the screen.(There is one of these for each channel). AC/DC switch. This should be left in the DC position unless you cannot get a signal on-screen otherwise. (There is one of these for each channel). AB/ADD switch. This allows you to display both input channels separately or to combine them into one. +/- switch. This allows you to invert the B channel on the display. Channel A input Channel B input X POSITION these allow you to adjust the horizontal position of the signals on the screen. LEVEL this allows you to determine the trigger level; i.e. the point of the waveform at which the ramp voltage will begin in time base mode. ms/ µs This defines the multiplication factor for the horizontal scale in timebase mode. (See 15 below.) MAGN The horizontal scale units are to be multiplied by this setting in both timebase and xy modes. To avoid confusion, leave it at x1 unless you really need to change it. Time/Div This selector controls the frequency at which the beam sweeps horizontally across the screen in time base mode, as well as whether the oscilloscope is in timebase mode or xy (x VIA A) mode. This switch has the following positions: (a) X VIA A In this position, an external signal connected to input A is used in place of the internally generated ramp. (This is also known as xy mode.) (b) .5, 1, 2, 5, etc. Here the internally generated ramp voltage will repeat such that each large (cm) horizontal division corresponds to .5, 1, 2, 5, etc. ms. or  µs depending on the multiplier and magnitude settings. (Note also the x1/x5 switch in 14 above.) The following controls are for triggering of the scope, and only have an effect in timebase mode. A/B selector. This allows you to choose which signal to use for triggering. -/+ will force the ramp signal to synchronise its starting time to either the decreasing or increasing part of the unknown signal you are studying. INT/EXT This will determine whether the the ramp will be synchronised to the signal chosen by the A/B switch or by whatever signal is applied to the EXT. SYNC. input. (See 21 below.) AC/TV selectors. Ive never figured out what this does; find whichever position works. External trigger input INTRODUCTION FUNCTION GENERATOR A function generator is a device that can produce various patterns of voltage at a variety of frequencies and amplitudes. It is used to test the response of circuits to common input signals. The electrical leads from the device are attached to the ground and signal input terminals of the device under test. Most function generators allow the user to choose the shape of the output from a small number of options. Square wave The signal goes directly from high to low voltage. Sine wave The signal curves like a sinusoid from high to low voltage. Triangle wave The signal goes from high to low voltage at a fixed rate. The amplitude control on a function generator varies the voltage difference between the high and low voltage of the output signal. The direct current (DC) offset control on a function generator varies the average voltage of a signal relative to the ground. The frequency control of a function generator controls the rate at which output signal oscillates. On some function generators, the frequency control is a combination of different controls. One set of controls chooses the broad frequency range (order of magnitude) and the other selects the precise frequency. This allows the function generator to handle the enormous variation in frequency scale needed for signals. The duty cycle of a signal refers to the ratio of high voltage to low voltage time in a square wave signal. FUNCTION OF FUNCTION GENERATOR Analog function generators usually generate a triangle waveform as the basis for all of its other outputs. The triangle is generated by repeatedly charging and discharging a capacitor from a constant current source. This produces a linearly ascending or descending voltage ramp. As the output voltage reaches upper and lower limits, the charging and discharging is reversed using a comparator, producing the linear triangle wave. By varying the current and the size of the capacitor, different frequencies may be obtained. A 50% duty cycle square wave is easily obtained by noting whether the capacitor is being charged or discharged, which is reflected in the current switching comparators output. Most function generators also contain a non-linear diode shaping circuit that can convert the triangle wave into a reasonably accurate sine wave. It does so by rounding off the hard corners of the triangle wave in a process similar to clipping in audio systems. The type of output connector from the device depends on the frequency range of the generator. A typical function generator can provide frequencies up to 20 MHz and uses a BNC connector, usually requiring a 50 or 75 ohm termination. Specialised RF generators are capable of gigahertz frequencies and typically use N-type output connectors. Function generators, like most signal generators, may also contain an attenuator, various means of modulating the output waveform, and often the ability to automatically and repetitively sweep the frequency of the output waveform (by means of a voltage-controlled oscillator) between two operator-determined limits. This capability makes it very easy to evaluate the frequency response of a given electronic circuit. Some function generators can also generate white or pink noise. More advanced function generators use Direct Digital Synthesis (DDS) to generate waveforms. Arbitrary waveform generators use DDS to generate any waveform that can be described by a table of amplitude values. REFERENCE http://www.doctronics.co.uk/scope.htm http://www.9h1mrl.org/workshop/CRO-Ebook-1/html/CRO-P1-Intro.html http://denethor.wlu.ca/pc200/scope/oscilloscope.pdf http://cnx.org/content/m11895/latest/

The Wilderness in Margaret Atwood’s Surfacing, Mary Austin’s Land of Li

The Wilderness in Margaret Atwood’s Surfacing, Mary Austin’s Land of Little Rain, and Gary Snyder’s The Practice of the Wild Journeys into the wilderness test far more than the physical boundaries of the human traveler. Twentieth century wilderness authors move beyond the traditional travel-tour approach where nature is an external diversion from everyday life. Instead, nature becomes a catalyst for knowing our internal wilderness and our universal connections to all living things. In Margaret Atwood’s Surfacing, Mary Austin’s Land of Little Rain, and Gary Snyder’s The Practice of the Wild, â€Å"nature† mirrors each narrator: what the narrators ultimately discover in the wilderness reflects what needs they bring to it. Their points of view, expectations, and awareness all determine their experiences of the wild and â€Å"self.† Ultimately, however, each work reveals that the experience of nature need not be restricted only to â€Å"self-discovery,† but may well expand to an understanding of the spiritual â€Å"family self.† Atwood’s psychological novel describes the return journey by its narrator from a self-centered, urban existence to the Canadian wilderness of her youth, where she finds the meaning of family and her role in it. Though not overtly psychological, Mary Austin’s intense devotion to the life and people of her desert community suggests these have become replacements for her own, unsuccessful attempts at conventional family life. Finally, Gary Snyder’s kinship with nature exemplifies a life integrated in all aspects—a union that merges the practical, psychological, and spiritual into what may be called the â€Å"cosmic† family. Birth of Family Margaret Atwood’s Surfacing describes the heroine/narrator’s phy... ...our experiences: the progress of our consciousness. This progress resolves issues of the self and one’s individual past, heals our psychic pain, and releases us from powerlessness and fear. By accepting the wilderness in ourselves we will understand the wilderness in each other and our connectedness. Nature functions as catalyst, as guide, as test, as teacher. Then opening the spiritual window to grace, we ultimately realize the possibility of being fully human. References Atwood, Margaret. Surfacing (New York: Fawcett Crest, 1972). Austin, Mary. Stories from the Country of Lost Borders. Ed. Marjorie Pryse (New Brunswick: Rutgers UP, 1987). Pryse, Marjorie. "Introduction" to Stories from the Country of Lost Borders by Mary Austin. (New Brunswick: Rutgers UP, 1987). Snyder, Gary. The Practice of the Wild (San Francisco: North Point Press, 1990).

Helicopter Emergency Medical Service

Helicopter Emergency Medical Service Air medical transport has only been used for the past 70 years. The first true air ambulance flight was during the Great War. A Serbian officer was transported from the battlefield to the hospital by plane. Air ambulance was being tested by different military organizations during the First World War. Schaefer Air services was the first United States air ambulance service, created in 1947. The Korean War was the big turning point for EMS helicopters. In 1950, the military was given authorization to use helicopters for medical purposes.These helicopters were used to evacuate injured patients from the battlefield during combat. The small helicopters were equipped with basket stretchers that were attached to the landing gear. The patients were transported outside of the aircraft, which did not allow for medical during transport. From January 1951 to January 1953 more than 17,000 patients were removed from the battlefield and transported to the hospita l by helicopter. The use of medical helicopter transport significantly decreased the causality/death rate among the people in combat.World War II death/causality rate was 4. 5 deaths per 100 casualties, whereas, the Korean War death/casualty rate was 2. 5 deaths per 100 casualties. The Vietnam War introduced to idea of patients receiving medical care during air transport. The Bell UH-1 also known as the Huey was the frost helicopter that was large enough to carry the patient and medical staff inside the aircraft. The state of Maryland started the nation’s first combined emergency service helicopter program, in 1969. This program was put into place by the Maryland State Police and the University of Maryland.The program joined together the state police, rescue and HEMS (helicopter emergency medical service). In 1972, St. Anthony Central Hospital in Denver Colorado was the first hospital to have civilian hospital-based helicopter transport. This hospital-based helicopter transpo rt system is still in use today and is now intergrated with Denver EMS. The attributes of helicopter transport are speed, accessibility, specialized personnel and technology. Modern medical helicopters are capable of sustain speeds in excess of 150mph. This allows for patients to be transported to a specialized care center much faster than ground transport.Using a helicopter allows for emergency medical personnel to access patients in places ground crews cannot go. A helicopter can take off and land in a vertical motion. Emergency medical helicopters are staffed with highly trained and skilled staff. EMS helicopters are equipped with highly sophisticated medical technology and can reach people across a wide geographical area. When considering the use of the EMS helicopter you should take all these attributes into consideration. If these attributes are not important, then the use of an expensive EMS helicopter should not be used.Air medical transport can pose its own stressors to pat ients, medical staff and medical equipment. These stressors are more predominant in fixed-wing operations rather than helicopter transport. Hypoxemia is the biggest threat to people who fly. However helicopters no dot exceed 1000 feet above sea level. Patients being transported by helicopter are at no significant risk of hypoxemia secondary to decreased ambient pressure. Acceleration of the aircraft is another factor that can stress the patient. Helicopter acceleration force is not that much different than that of ground transport.Acceleration is more significant in fixed-wing aircraft. Noise is a major issue when it comes to helicopter transport. The noise inside the helicopter causes problems for the medical staff. The noise may hinder the medical staff from hearing lung sounds. The staff must use headphones and an intercom system to communicate. Vibration of the aircraft is another problem for the patient and staff. The vibrations can cause fatigue and discomfort to the patient. Vibration can also cause monitoring errors and equipment malfunction. Air medical transport has a few cons but when life is on the line these issues seem minor.Each helicopter has its own transport team. The transport team may consist of a pilot, registered nurse or paramedic, and can include EMT’s and EMT-I’s. Some flight crews include a physician. Physicians on fight crews have posed a lot of controversy as to whether a physician as a crew member improves the outcome of the patient. Each crew member must undergo many education courses as well as hands on training before being employed by HEMS. Safety is the most important aspect to HEMS. Emergency medical helicopters have an alarming history of crashes.The National Transportation Safety Board conducted a study to determine the major causes of helicopter crashes. Important areas of flight risk are the pilots, the mechanics of the aircraft, crew training, maintenance, weather conditions, time of day, and landing sites. The study showed that poor weather conditions posed the greatest risk for helicopter crashes. Since, the study many improvements have been made to improve the crash rate. It has been said that the sole decision is set on the pilot as to whether it is safe enough to take the flight or not.The pilot must consider the weather conditions, aircraft maintainence, and crew readiness. Medical personnel cannot make the decision to take the call. Medical personnel should not tell the pilot the nature of the call, because this may deter the pilot’s judgment. Currently the Federal Aviation Administration is looking to make changes in the safety procedures of HEMS. Air medical transport is generally used in for two reasons, rescue and inter-hospital transfer. Helicopter transport is very expensive and is potentially dangerous.Rescue helicopters are dispatched by emergency personnel at the scene. The helicopter reports to the scene of the accident or illness. When should a EMS helicopter be dispatched? EMS helicopter should only be called out when speed, accessibility, specialized equipment and personnel are all needed to save life or limb. Inter-hospital air medical transport is generally used to transfer critically ill patients to another hospital that suites the needs of the patient. There are two types of landing sites for EMS helicopters. One type is the controlled site. The controlled site located at hospitals.These landing sites are constructed to safely accomindate the aircraft. The second type of landing site is the uncontrolled landing site. The uncontrolled landing site is landing at the scene of an accident. The landing site is selected by the ground EMS. The pilot looks at the site and determines if it is safe to land or not. Ground EMS are trained on how to chose, and mark a landing site. Ground EMS personnel are also trained on how to behave around the aircraft. When a patient is going to be transported by air the ground EMS must prepare the patient f or transport.The EMS ground crew should have the patient stabilized as much as possible before transport. Another way ground EMS can prepare the patient is to intubate a patient that has a high potential for loss of airway. Good communication is the biggest factor in a successful transport. Ground EMS typically has radio communication with the helicopter. The communication between the two should be maintained until after the helicopter takes off. Maintaining good communication allows the flight crew to inform ground EMS of any major, unexpected patient complications or malfunctions of the aircraft.EMS helicopters must have well trained, diverse flight crews. These crew members must be able to perform their duties on the scene of an accident and while in flight. The crew members are trained to handle many different types of patients such as drowning, burns, spinal cord injuries, heart attacks, pediatric and neonatal patients. The flight nurse is responsible for the patient assessment , and interventions before loading the patient on the aircraft. The flight nurse must know how to use all the equipment and know all the safety guidelines pertaining to the aircraft.There are many different requirements to becoming a flight paramedic. A person who wants to become a flight paramedic must be able to work in chaotic situations. Becoming a flight paramedic involves a lot of hard work and dedication. The person who wants to become a paramedic must have at least one year EMT experience and many different certifications such as: CPR, Basic Life Support (BLS), Basic Pediatric Life Support (BPLS), Basic Trauma Life Support (BTLS), Neo Natal Life Support (NALS), Advanced Cardiac Life Support (ACLS), and Pediatric Advanced Life Support (PALS).In order to become a flight paramedic this person would have to have at least 5 years critical care experience in a high volume progressive EMS system. Becoming a flight paramedic is no easy task.References Formm, Jr. Robert E. â€Å"Air medical transport†. Journal of Family Practice. March 1993. http://www. findarticals. com/p/articles. html . 1 Oct. 2010. Kreisher, Otto. â€Å"The Rise of the Helicopter During the Korean War†. Aviation History Magazine. History. net Jan 2007. http://www. historynet. com/the-rise-of-the -helicopter-during-the-korean-war. htm. 1 Oct. 010 Federal Aviation Administration. â€Å"Helicopter Emergency Medical Service Safety. †8 June 2010. http://www. faa. gov/news/fact_sheets/news_story. cfm? newsID+6763. 1 Oct. 2010. Lenworth M. Jacobs, MD, MPH, FACS, and Bennet, Barbra, RN, MPH. â€Å"The Critical Care Helicopter System in Trauma. † Hartford Conneticut.. http://www. ncbi. nlm. nih. gov/pmc/articles/PMC/articles. 1 Oct. 2010 Gentile. Rosanne. â€Å"How to Become a Flight Paramedic: Required Qualifications and Education. † Associated Content. 18 August 2008. http://associatedcontent. com. 1 Oct. 2010

Free Essays on Henry Thoreau A Critical Analysis

Henry David Thoreau wrote in chapter 2 of Waldon: Time is but a stream I go a-fishing in. I drink at it; but while I drink I see the sandy bottom and detect how shallow it is. It’s thin current slides away, but eternity remains. I would drink deeper; fish in the sky, whose bottom are pebbly with stars. I cannot count one. I know not the first letter of the alphabet. I have always been regretting that I was not as wise as the day I was born. The intellect is a cleaver; it discerns and rifts its way into then secret of things. I do not wish to be any more busy with my hands than is necessary. My head is hands and feet. I feel all my best faculties concentrated in it. My instincts tell me my head is an organ for burrowing, as some creatures use their snout and fore-paws, and with it I will mine and burrow my way through these hills. I think that the richest vein is somewhere hereabouts; so by the divining rod and thin rising vapors I judge; and here I will begin to mine. In this passage, Thoreau is trying to Understand the complexities of our lives, as well as that of the time we spend here. He begins by comparing time to a stream, an ever-flowing endless body of water, yet he is still able to see the bottom. In saying this, I gather he is comparing his life span (the distance to the bottom) to the ever-flowing body of time. He is telling us our life is but a short period in the stream of time. It is important to understand that we are not as significant as we would like to believe. Thoreau believes the only way to cut through this insignificance is to use our intellect like a â€Å"cleaver†. Cut through the all of the social mores and beliefs that have jaded our view on this wonderful world in which we live. To cut through our own faults and fears and discover the vein of truth that is within us all. He teaches us not to bother with unnecessary busy work, and focus on the more important things in our lives. To... Free Essays on Henry Thoreau A Critical Analysis Free Essays on Henry Thoreau A Critical Analysis Henry David Thoreau wrote in chapter 2 of Waldon: Time is but a stream I go a-fishing in. I drink at it; but while I drink I see the sandy bottom and detect how shallow it is. It’s thin current slides away, but eternity remains. I would drink deeper; fish in the sky, whose bottom are pebbly with stars. I cannot count one. I know not the first letter of the alphabet. I have always been regretting that I was not as wise as the day I was born. The intellect is a cleaver; it discerns and rifts its way into then secret of things. I do not wish to be any more busy with my hands than is necessary. My head is hands and feet. I feel all my best faculties concentrated in it. My instincts tell me my head is an organ for burrowing, as some creatures use their snout and fore-paws, and with it I will mine and burrow my way through these hills. I think that the richest vein is somewhere hereabouts; so by the divining rod and thin rising vapors I judge; and here I will begin to mine. In this passage, Thoreau is trying to Understand the complexities of our lives, as well as that of the time we spend here. He begins by comparing time to a stream, an ever-flowing endless body of water, yet he is still able to see the bottom. In saying this, I gather he is comparing his life span (the distance to the bottom) to the ever-flowing body of time. He is telling us our life is but a short period in the stream of time. It is important to understand that we are not as significant as we would like to believe. Thoreau believes the only way to cut through this insignificance is to use our intellect like a â€Å"cleaver†. Cut through the all of the social mores and beliefs that have jaded our view on this wonderful world in which we live. To cut through our own faults and fears and discover the vein of truth that is within us all. He teaches us not to bother with unnecessary busy work, and focus on the more important things in our lives. To...

Peoples Republic of China Facts and History

Peoples Republic of China Facts and History The history of China reaches back over 4,000 years. In that time, China has created a culture rich in philosophy and the arts. China has seen the invention of amazing technologies such as silk, paper, gunpowder, and many other products. Over the millennia, China has fought hundreds of wars. It has conquered its neighbors, and been conquered by them in turn. Early Chinese explorers such as Admiral Zheng He sailed all the way to Africa; today, Chinas space program continues this tradition of exploration. This snapshot of the Peoples Republic of China today includes a necessarily brief scan of Chinas ancient heritage. Capital and Major Cities Capital: Beijing, population 11 million. Major Cities: Shanghai, population 15 million. Shenzhen, population 12 million. Guangzhou, population 7 million. Hong Kong, population 7 million. Dongguan, population 6.5 million. Tianjin, population 5 million. Government The Peoples Republic of China is a socialist republic ruled by a single party, the Communist Party of China. Power in the Peoples Republic is divided between the National Peoples Congress (NPC), the President, and the State Council. The NPC is the single legislative body, whose members are selected by the Communist Party. The State Council, headed by the Premier, is the administrative branch. The Peoples Liberation Army also wields considerable political power. The current President of China and General Secretary of the Communist Party is Xi Jinping. The Premier is Li Keqiang. Official Language The official language of the PRC is Mandarin, a tonal language in the Sino-Tibetan family. Within China, however, only about 53 percent of the population can communicate in Standard Mandarin. Other important languages in China include Wu, with 77 million speakers; Min, with 60 million; Cantonese, 56 million speakers; Jin, 45 million speakers; Xiang, 36 million; Hakka, 34 million; Gan, 29 million; Uighur, 7.4 million; Tibetan, 5.3 million; Hui, 3.2 million; and Ping, with 2 million speakers. Dozens of minority languages also exist in the PRC, including Kazakh, Miao, Sui, Korean, Lisu, Mongolian, Qiang, and Yi. Population China has the largest population of any country on Earth, with more than 1.35 billion people. The government has long been concerned about population growth  and introduced the One-Child Policy in 1979. Under this policy, families were limited to just one child. Couples who got pregnant for a second time faced forced abortions or sterilization. This policy was loosened in December of 2013 to allow couples to have two children if one or both of the parents were only children themselves. There are exceptions to the policy for ethnic minorities, as well. Rural Han Chinese families also have always been able to have a second child if the first is a girl or has disabilities. Religion Under the communist system, religion has been officially discouraged in China. Actual suppression has varied from one religion to another, and from year to year. Many Chinese are nominally Buddhist and/or Taoist  but dont practice regularly. People who self-identify as Buddhist total about 50 percent, overlapping with the 30 percent who are Taoist. Fourteen percent are atheists, four percent Christians, 1.5 percent Muslims, and tiny percentages are Hindu, Bon, or Falun Gong adherents. Most Chinese Buddhists follow Mahayana or Pure Land Buddhism, with smaller populations of Theravada and Tibetan Buddhists. Geography Chinas area is 9.5 to 9.8 million square kilometers; the discrepancy is due to border disputes with India. In either case, its size is second only to Russia in Asia  and is either third or fourth in the world. China borders 14 countries: Afghanistan, Bhutan, Burma, India, Kazakhstan, North Korea, Kyrgyzstan, Laos, Mongolia, Nepal, Pakistan, Russia, Tajikistan, and Vietnam. From the worlds tallest mountain to the coast, and the Taklamakan desert to the jungles of Guilin, China includes diverse landforms. The highest point is Mt. Everest (Chomolungma) at 8,850 meters. The lowest is Turpan Pendi, at -154 meters. Climate As a result of its large area and various landforms, China includes climate zones from subarctic to tropical. Chinas northern province of Heilongjiang has average winter temperatures below freezing, with record lows of -30 degrees Celsius. Xinjiang, in the west, can reach nearly 50 degrees. Southern Hainan Island has a tropical monsoon climate. Average temperatures there range only from about 16 degrees Celsius in January to 29 in August. Hainan receives about 200 centimeters (79 inches) of rain annually. The western Taklamakan Desert receives only about 10 centimeters (4 inches) of rain and snow per year. Economy Over the past 25 years, China has had the fastest-growing major economy in the world, with annual growth of more than 10 percent. Nominally a socialist republic, since the 1970s the PRC has remade its economy into a capitalist powerhouse. Industry and agriculture are the largest sectors, producing more than 60 percent of Chinas GDP, and employing over 70 percent of the workforce. China exports $1.2 billion U.S. in consumer electronics, office machinery, and apparel, as well as some agricultural produce each year. The per capita GDP is $2,000. The official poverty rate is 10 percent. Chinas currency is the yuan renminbi. As of March 2014, $1 US 6.126 CNY. History of China Chinese historical records reach back into the realm of legend, 5,000 years ago. It is impossible to cover even the major events of this ancient culture in a short space, but here are some highlights. The first non-mythical dynasty to rule China was the Xia (2200- 1700 BCE), founded by Emperor Yu. It was succeeded by the Shang Dynasty (1600-1046 BCE), and then the Zhou Dynasty (1122-256 BCE). Historical records are scanty for these ancient dynastic times. In 221 BCE, Qin Shi Huangdi assumed the throne, conquering neighboring city-states, and unifying China. He founded the Qin Dynasty, which lasted only until 206 BCE. Today, he is best-known for his tomb complex in Xian (formerly Changan), which houses the incredible army of terracotta warriors. Qin Shi Huangs inept heir was overthrown by the army of commoner Liu Bang in 207 BCE. Liu then founded the Han Dynasty, which lasted until 220 CE. In the Han era, China expanded west as far as India, opening trade along what would later become the Silk Road. When the Han Empire collapsed in 220 CE, China was thrown into a period of anarchy and turmoil. For the next four centuries, dozens of kingdoms and fiefdoms competed for power. This era is called the Three Kingdoms, after the three most powerful of the rival realms (Wei, Shu, and Wu), but that is a gross simplification. By 589 CE, the Western branch of the Wei kings had accumulated enough wealth and power to defeat their rivals  and unite China once more. The Sui Dynasty was founded by Wei general Yang Jian  and ruled until 618 CE. It built the legal, governmental, and societal framework for the powerful Tang Empire to follow. The Tang Dynasty was founded by a general called Li Yuan, who had the Sui emperor assassinated in 618. The Tang ruled from 618 to 907 CE, and Chinese art and culture flourished. At the end of the Tang, China descended into chaos again in the 5 Dynasties and 10 Kingdoms period. In 959, a palace guard named Zhao Kuangyin took power and defeated the other small kingdoms. He established the Song Dynasty (960-1279), known for its intricate bureaucracy and Confucian learning. In 1271, the Mongolian ruler Kublai Khan (grandson of Genghis) established the Yuan Dynasty (1271-1368). The Mongols subjugated other ethnic groups including the Han Chinese  and eventually were overthrown by the ethnic-Han Ming. China flowered again under the Ming (1368-1644), creating great art and exploring as far as Africa. The final Chinese dynasty, the Qing, ruled from 1644 to 1911, when  the  Last Emperor  was overthrown.  Power struggles between warlords such as Sun Yat-Sen touched off the Chinese Civil War. Although the war was interrupted for a decade by the Japanese invasion and World War II, it picked up again once Japan was defeated. Mao Zedong and the Communist Peoples Liberation Army won the Chinese Civil War, and China became the Peoples Republic of China in 1949. Chiang Kai Shek, leader of the losing Nationalist forces, fled to Taiwan.

Case study Example | Topics and Well Written Essays - 500 words - 24

Case Study Example This would mean that when the mathematical calculations are tallied in December they will be synthesized and far less than a genuine reflection of company’s exact numbers. But the â€Å"Christmas Bonus† would be present just as the manager wishes and is accustomed to. There is no question that this company’s yearly tradition will provide a better portfolio, but results in a far lower that acceptable ethical standard for all those who participate. The position that Terri is in is a difficult one. It is established that she is new to her position and eager to do the best possible job. Her manager asked her to change the numbers because the last person in her position had had no problem doing so. This directly reflects back to the questionable tactics of organizational socialization. She is presented with unethical tasks as if it common place and an everyday normality, and therefore acceptable. There is even a slight insinuation by the manager that is an expected part of her position. When faced with an ethical dilemma Holly Green, CEO and Managing Director of the Human Factor Consulting Firm, says, â€Å"You have to make decisions on whether you can live with it.†(qtd. in Balderrama, 2009) We all have a conscience, and it usually tells us when something just does not feel right. Often, people just don’t listen to it. She will have to make her decision and then stand by it. If she options not to do the unethical a ct requested there could be some unpleasant repercussions. This will, probably, not be the outright loss of employment, but she could face being passed over for promotions. In some worse case scenarios, the company may make her so miserable that she options to quit the company all on her own.(Zimmerman, 2010) So what does Terri do? Well that is what makes this so difficult. Doing the right thing should not be so hard. If

Pampers Health Spa (PHS) Assignment Example | Topics and Well Written Essays - 2250 words

Pampers Health Spa (PHS) - Assignment Example 2325540 =? 2325540 1 – (Variable Cost / Sales)] 1 - 0.499 0.501 Break-even point= ? 4641796.41 (Atrill & McLaney, 2011) Margin of safety % = Current sales level – Break- Even Point Current sales level Margin of safety % = ? 2965000 -? 4641796.41 = (56.55) % (Atrill & McLaney, 2011) ? 2965000 Task 3 Payback period method Proposal 1 The project requires an investment of ?900,000 and it generates cash as follows: ?270000 in Year 1; ?295000 in Year 2; ?345000 in Year 3; ?325000 in Year 4. The payback period is 3 years ?270000+ ?295000= ?565000 in the first two years + ?335000 of the ?345000 occurring in Year 3). Payback period method= ?270000+ ?295000+?335000= ?900,000 ?335000/ ?345000 =0.971 Payback period= 2+0.971=3 years Proposal 2 The project requires an investment of ? 750000 and it generates cash as follows: ?160000 in Year 1; ?189000 in Year 2; ?225000 in Year 3: ?254000 in Year 4. The payback period is 3.7 years ?160000 + ?189000 +?225000 = ?565000 in the first thre e years + ?78000 of the ?254000 occurring in Year 4). ?160000 + ?189000 +?225000 +?78000= ?750 000 ?176000/ ?254000=0.693 Payback period= 3+0.693=3.7 years Accounting Rate of Return Accounting Rate of Return =Average net income / Average investment (Davies & Pain, 2011) Proposal 1: Average net income =90000 + 98000 +75000 + 65000 = 328000/ ?900,000* 100= 36.44% Proposal 2: Average net income = 60000 + 70000 + 95000 + 125000 = 350000/ ?750 000 * 100 = 46.67% Net Present Value methods NPV= -Co + C1/1+r + C2/ (1+r) 2 +†¦+ C n / (1+r) n (Davies & Pain, 2011) -Co= Initial Investment, C = Cash Flow, r = Discount rate, n = Time Proposal1 NPV= ? (900,000) + ?270000 / (1+0.893) + ?295000/ (1+0.797) 2 + +?345000 / (1+0.712) 3+ ?325000 / (1+0.636) 4 NPV= ? (900000) + ? 247865.60176 + ? 91353.8957 + ? 68755.2314+ ? 45368.2506 = ? (446,657.0206) Proposal 2 NPV= ? (750000) + ?160000 / (1+0.893) + ?189000 / (1+0.797) 2 + +?225000 / (1+0.712) 3+ ?254000/ (1+0.636) 4 NPV= ? (750000) + ? 84521.9 229 + ? 58528.4281 + ? 44840.3683 +? 35457.0328 = ? (526652.2479) Total Expenses Fixed cost (70%) Variable cost (30%) ? ? ? Motor Expenses 8900 6230 2670 Insurance 28700 20090 8610 Rates 20400 14280 6120 Premises 1680000 1176000 504000 Wages and Salaries 1445000 1011500 433500 Repairs & renewals 54700 38290 16410 Professional charges 17500 12250 5250 Advertising 67000 46900 20100 Cost of Sales 483700 Total 2325540 1480360 Contribution ratio = Sales/ total variable cost = ?1480360 / ?2965000 =0.499 Task 4: In order to ascertain the financial position of Pampers Health Spa’ (PHS) it is necessary to carry out a financial analysis as it measures the financial performance of the enterprise in terms of profitability, leverage, and liquidity in its operations. As the management of Pampers Health