Evolution of the Human Heart into Four Chambers

Evolution of the Human Heart into Four Chambers The human heart does not look much like those Valentines Day candies or the pictures we drew on our love notes when we were in elementary school. The current human heart is a large muscular organ with four chambers, a septum, several valves, and other various parts necessary for pumping blood all around the human body. However, this amazing organ is a product of evolution and has spent millions of years perfecting itself in order to keep humans alive. Invertebrate Hearts Invertebrate animals have very simple circulatory systems. Many do not have a heart or blood because they are not complex enough to need a way to get nutrients to their body cells. Their cells are able to just absorb nutrients through their skin or from other cells. As the invertebrates become a little more complex, they use an open circulatory system. This type of circulatory system does not have any blood vessels or has very few. The blood is pumped throughout the tissues and filters back to the pumping mechanism. Like in earthworms, this type of circulatory system does not use an actual heart. It has one or more small muscular areas capable of contracting and pushing the blood and then reabsorbing it as it filters back. However, these muscular regions were the precursors to our complex human heart. Fish Hearts Of the vertebrates, fish have the simplest type of heart. While it is a closed circulatory system, it has only two chambers. The top is called the atrium and the bottom chamber is called the ventricle. It has only one large vessel that feeds the blood into the gills to get oxygen and then transports it around the fishs body. Frog Hearts It is thought that while fish only lived in the oceans, amphibians like the frog were the link between water-dwelling animals and the newer land animals that evolved. Logically, it follows that frogs would, therefore, have a more complex heart than fish since they are higher on the evolutionary chain. In fact, frogs have a three-chambered heart. Frogs evolved to have two atria instead of one, but still only have one ventricle. The separation of the atria allows frogs to keep the oxygenated and deoxygenated blood separate as they come into the heart. The single ventricle is very large and very muscular so it can pump the oxygenated blood throughout the various blood vessels in the body. Turtle Hearts The next step up on the evolutionary ladder is the reptiles. It was recently discovered that some reptiles, like turtles, actually have a heart that has a sort of a three and a half chambered heart. There is a small septum that goes about halfway down the ventricle. The blood is still able to mix in the ventricle, but the timing of the pumping of the ventricle minimizes that mixing of the blood. Human Hearts The human heart, along with the rest of the mammals, is the most complex having four chambers. The human heart has a fully formed septum that separates both the atria and the ventricles. The atria sit on top of the ventricles. The right atrium receives deoxygenated blood coming back from various parts of the body. That blood is then let into the right ventricle which pumps the blood to the lungs through the pulmonary artery. The blood gets oxygenated and then returns to the left atrium through the pulmonary veins. The oxygenated blood then goes into the left ventricle and is pumped out to the body through the largest artery in the body, the aorta. This complex, but efficient, way of getting oxygen and nutrients to body tissues took billions of years to evolve and perfect.

F-105 Thunderchief in the Vietnam War

F-105 Thunderchief in the Vietnam War Design of the F-105 Thunderchief began in the early 1950s as an internal project at Republic Aviation. Intended to be a replacement for the F-84F Thunderstreak, the F-105 was created as a supersonic, low-altitude penetrator capable of delivering a nuclear weapon to a target deep within the Soviet Union. Led by Alexander Kartveli, the design team produced an aircraft centered on a large engine and able to achieve high speeds. As the F-105 was meant to be a penetrator, maneuverability was sacrificed for speed and low-altitude performance. F-105D Specifications General Length: 64 ft. 4.75 in.Wingspan: 34 ft. 11.25 in.Height: 19 ft. 8 in.Wing Area: 385 sq. ft.Empty Weight: 27,500 lbs.Loaded Weight: 35,637 lbs.Crew: 1-2 Performance Power Plant: 1 Ãâ€" Pratt Whitney J75-P-19W afterburning turbojet, 26,500 lbf with afterburning water injectionCombat Radius: 780 milesMax Speed: Mach 2.08 (1,372 mph)Ceiling: 48,500 ft. Armament Guns: 1 Ãâ€" 20 mm M61 Vulcan cannon, 1,028 roundsBombs/Rockets: Up to 14,000 lbs. of ordnance including nuclear weapons, AIM-9 Sidewinder, and AGM-12 Bullpup missiles. Weapons carried in the bomb bay and on five external hardpoints. Design and Development Intrigued by Republics design, the US Air Force placed an initial order for 199 F-105s in September 1952, but with the Korean War winding down reduced it to 37 fighter-bombers and nine tactical reconnaissance aircraft six months later. As development progressed, it was found that the design had grown too large to be powered by the Allison J71 turbojet intended for the aircraft. As a result, they elected to utilize the Pratt Whitney J75. While the preferred power plant for the new design, the J75 was not immediately available and as a result on October 22, 1955, the first YF-105A prototype flew powered by a Pratt Whitney J57-P-25 engine. Though equipped with the less powerful J57, the YF-105A achieved a top speed of Mach 1.2 on its first flight. Further test flights with the YF-105A soon revealed that the aircraft was underpowered and suffered from problems with transonic drag. To counter these issues, Republic was finally able to obtain the more powerful Pratt Whitney J75 and altered the arrangement of the air intakes which were located at the wing roots. Additionally, it worked to redesign the aircraft fuselage which initially employed a slab-sided look. Drawing on experiences from other aircraft producers, Republic employed the Whitcomb area rule by smoothing the fuselage and slightly pinching it in the center.     Ã‚   Refining the Aircraft The redesigned aircraft, dubbed the F-105B, proved able to achieve speeds of Mach 2.15. Also included were improvements to its electronics including the MA-8 fire control system, a K19 gun sight, and an AN/APG-31 ranging radar. These enhancements were required to allow the aircraft to conduct its intended nuclear strike mission. With the alterations complete, the YF-105B first took to the sky on May 26, 1956. The following month a trainer variant (F-105C) of the aircraft was created while the reconnaissance version (RF-105) was canceled in July. The largest single-engine fighter built for the US Air Force, the production model of F-105B possessed an internal bomb bay and five external weapons pylons. To continue a company tradition of employing Thunder in its aircraft names, which dated back to World War IIs P-47 Thunderbolt, Republic requested that the new aircraft be designated Thunderchief. Early Alterations On May 27, 1958, the F-105B entered service with the 335th Tactical Fighter Squadron. As with many new aircraft, the Thunderchief was initially plagued by problems with its avionics systems. After these were dealt with as part of Project Optimize, the F-105B became a reliable aircraft. In 1960, the F-105D was introduced and the B model transitioned to the Air National Guard. This was completed by 1964. The last production variant of the Thunderchief, the F-105D included an R-14A radar, an AN/APN-131 navigation system, and an AN/ASG-19 Thunderstick fire-control system which gave the aircraft all-weather capability and the ability to deliver the B43 nuclear bomb. Efforts were also made to restart the RF-105 reconnaissance program based on the F-105D design. The US Air Force planned to purchase 1,500 F-105Ds, however, this order was reduced to 833 by Secretary of Defense Robert McNamara. Issues Deployed to Cold War bases in Western Europe and Japan, F-105D squadrons trained for their intended deep penetration role. As with its predecessor, the F-105D suffered from early technological issues. These issues may have helped earn the aircraft the nickname Thud from the sound the F-105D made when it hit the ground though the true origins of the term are unclear. As a result of these problems, the entire F-105D fleet was grounded in December 1961, and again in June 1962, while the issues were dealt with at the factory. In 1964, the issues in existing F-105Ds were resolved as part of Project Look Alike though some engine and fuel system problems persisted for another three years. Vietnam War Through the early- and mid-1960s, the Thunderchief began to be developed as a conventional strike bomber rather than a nuclear delivery system. This was further emphasized during the Look Alike upgrades which saw the F-105D receive additional ordnance hard points. It was in this role that it was sent to Southeast Asia during the escalation of the Vietnam War. With its high-speed and superior low-altitude performance, the F-105D was ideal for hitting targets in North Vietnam and far superior to the F-100 Super Sabre then in use. First deployed to bases in Thailand, F-105Ds began flying strike missions as early as late 1964. With the commencement of Operation Rolling Thunder in March 1965, F-105D squadrons began bearing the brunt of the air war over North Vietnam. A typical F-105D mission to North Vietnam included mid-air refueling and a high-speed, low altitude entry and exit from the target area. Though an extremely durable aircraft, F-105D pilots usually only had a 75 percent chance of completing a 100-mission tour due to the danger involved in their missions. By 1969, the US Air Force began withdrawing the F-105D from strike missions replacing it with F-4 Phantom IIs. While the Thunderchief ceased to fulfill a strike role in Southeast Asia, it continued to serve as a wild weasel. Developed in 1965, the first F-105F Wild Weasel variant flew in January 1966. Possessing a second seat for an electronic warfare officer, the F-105F was intended for a suppression of enemy air defenses (SEAD) mission. Nicknamed Wild Weasels, these aircraft served to identify and destroy North Vietnamese surface-to-air missile sites. A dangerous mission, the F-105 proved highly capable as its heavy payload and expanded SEAD electronics allowed the aircraft to deliver devastating blows to enemy targets. In late 1967, an enhanced wild weasel variant, the F-105G entered service. Due to the nature of the wild weasel role, F-105Fs and F-105Gs were typically the first to arrive over a target and the last to leave. While the F-105D had been completely removed from strike duties by 1970, the wild weasel aircraft flew until the wars end. In the course of the conflict 382 F-105s were lost to all causes, representing 46 percent of the US Air Forces Thunderchief fleet. Due to these losses, the F-105 was ruled to no longer be combat effective as a frontline aircraft. Sent to the reserves, the Thunderchief remained in service until officially being retired on February 25, 1984.

Network Security Architecture Research Paper Example | Topics and Well Written Essays - 250 words

Network Security Architecture - Research Paper Example When analyzing the vulnerability of a WLAN, it is crucial to identify the trusted and un-trusted parts. The security edge in the Centralized approach is the WLAN switch. Here, the Access Points lack strong encryption or authentication technology hence making it vulnerable to rogue inappropriate communication between APs. In Distributed Architecture, on the other hand, security is extended to the client devices where strong encryption occurs at both the APs and client devices along with authentication. This makes attacks more difficult because the security edge is closer to the users. In this case, a Distributed Architecture can be considered more superior to the centralized architecture as the APs handle the packets and only traffic management needs to go to and from a central point. Careful planning, implementation and management are needed to eliminate WLAN security risks in an organization. This can be aided by establishing security policies and practices, separating internal networks logically, eliminating unnecessary protocols, protecting wireless devices, restricting AP connections, enabling VPN access only, among other

How Each Corporate Culture Differs From the Other Assignment - 9

How Each Corporate Culture Differs From the Other - Assignment Example For several decades, the Coca-Cola and PepsiCo have been in operating in the beverage industry asserting each other to capture a high amount of market share, improvement and promotion imprint amidst its consumers. Though friendly activities have been adopted by both the companies to maintain their leading position in the global level, however, it can be said that the main reason behind the continuous adaption of new techniques to attract new customers is their own strategy to change customer preferences and consumption. As a result, it has been viewed that the actions of both the company are often compared. Amid all the factors that have been in debate amid many critics relating to the two companies, the corporate culture prevailing in these two companies is considered to be one of the major factors that have to differentiate these two companies from each other (Grinton, 2010; Barney, 2003). The aspect of culture is considered to be the first priority in Coca-Cola as the company beli eves in developing an environment which would help in developing true dedication that would help in adapting the values of the company as one own. The first cultural aspect that is being followed in all its plans since its establishment is considering all the local business located in various part of the globe as a single entity. The Coca-Cola brand is determined for its representation of various qualities such as caring, connecting, integrity and excellence. The company also believes in a co-operative form of culture where all employees are provided the opportunity of sharing their ideas whether they work as a lower level staff or are a member of the higher authority. Additionally, emphases are also made to develop a close relation amid all the members working in a group within the organization as it is believed that establishing a close relation would help in developing skills that would directly facilitate in accomplishing the organization goal efficiently. Additionally, it has b een viewed that the company recruits people from around the world as it helps in determining the best policy and practice that would help to maintain a balanced working environment (The Coca-Cola Company, 2013; The Coca-Cola Company, 2009). Considering the aspect of culture it is observed that PepsiCo maintains a rigid and managerial form of culture within the organization. The company believes in blazing new traits and is viewed to implement guidelines and rules that help the individuals to develop commitment towards their job but as a team to strengthen the company performance as a whole. The company also strongly believes in recruiting people from a diversified background as it is believed that recruiting people from diversified background helps in understanding the preferences and the demands of different people belonging to different geographical regions. Additionally, an innovative form of culture also prevails in the company which motivates all employees in the company to adh ere innovative ways to meet the discriminating taste and preferences of its global customers (PepsiCo, n.d.).

Juvenile Probation Officers Essay Example for Free

Juvenile Probation Officers Essay All Juvenile Probation Officers (JPO) are required to complete 40 working hours per week following a flexible work schedule. JPOs are entitled to paid working holidays which includes, but are not limited to, New Year’s Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day and Christmas Day. Please note that in the occasion that the holiday falls on a Saturday or Sunday, another day off may be substituted, upon approval of the employer. JPOs may also be granted a vacation leave after six months of continuous service has been rendered. The number of vacation leave, however, will depend on the number of years in service, with a maximum of 15 days for those having rendered at least one year of continuous service. JPOs are also entitled to family leaves in cases of giving birth or conception-related cases, adoption, care of new-born child, family illness, child’s medical appointment of parent-teacher conference Health Insurance. All employees are entered in a group health insurance under a health maintenance organization (HMO) as approved by two-thirds of the majority during the General Assembly Meeting. The group insurance will cover hospitalization, health, long-tern disability, and accident expenses. Employer contribution starting January 2007 will be $557 per month. As such, premiums required for maintenance of the insurance, in excess of the employers contribution, shall be deducted by the state treasurer on the JPO’s salary on a monthly basis and upon employee’s written order. Retirement/ savings plan. After achieving five years of continuous service, provided that the employee is 50 years of age, a JPO is entitled to a retirement benefit which will be computed based on the employee’s age of retirement, length of service, and pre-retirement earnings. Employees may opt for a normal or early retirement, the latter, however, will deduct the accrued benefits for the years prior to the normal retirement age. The employee may choose to receive payment of benefits on a straight life annuity where the retiree will be paid on a periodic basis; or lump-sum payment where the retiree will receive the full one-time payment and no further benefits will be given to the employee upon receipt of payment. Other options will be joint-and-survivor annuity where benefits are provided for married participants. The amount of survivor annuity shall be between 50-100% of the amount payable for the time the couple is alive. The amount, however, will be lower than that received from straight life annuity. In cases where an employee become totally disabled or ill prior to his eligibility in the retirement plan, but has served the company for 10 consecutive years, he will be entitled for a disability retirement benefit, which he could defer or immediately claim. Life insurance. In cases of death or dismemberment of employees, they will be entitled to a life insurance benefit which will be paid in lump sum following the multiple-of-earnings formula. Using this formula, the length of service and earnings of the employee will be incorporated in the computation and will therefore increase following an increase in employee’s salary. Provisions for the life insurance includes accidental death and dismemberment benefits to the employee or his beneficiary equivalent to the basic life insurance and a percentage of the life benefit for dismemberment; monthly income to surviving family members of the employee; retirement from work; and reduction of life insurance for employees near or above 65 years.

charhf Development of Hucks Character :: Adventures Huckleberry Huck Finn Essays

Huckleberry Finn – Development of His Character    Mark Twain's The Adventures of Huckleberry Finn displays the development of a 'sound hearted pre teen boy' called Huck Finn. We see Huck develop in character, attitude and maturity as he travels down the Mississippi River. This is represented through Huck's search for freedom from 'sivilisation' and it's beliefs and through his personal observations of a corrupt and immoral society. Most importantly, we live through Huck's confusion over his supposedly immoral behavior and his acceptance that he will '...go to Hell...' as he conquers his social beliefs.    Huck's displeasure in 'sivilisation' and it's beliefs is the trigger to his development. Initially, Huck is presented as a uneducated 12 year old, born in to the rigorous life of pre-civil war America. He lives with Widow Douglas (Huck's conservative and motherly foster parent) and Miss Watson (Widow Douglas' sister) who both try to 'sivilise' Huck through religion, manners and beliefs. 'In the opening chapters, Huck is relatively though not completely, untouched by society. He is totally unsophisticated and is basically unthwarted by the ethical ideals and manners of adult society or by the game-playing unreality of Tom Sawyer.' PAUL EGGERT: Literary Perspectives. From this critics comment, we see that Huck's limited understanding in the 'sivilised' world also limited his capacity to comprehend society's teachings such as religion '...she told me all about the bad place, and I said I wish I was there.' and it's rules and life style 'She put me in them new clothes again, and I couldn't do nothing but sweat and sweat, and feel all cramped up.' This in many ways allowed Huck to make decisions from his own moral evaluation instead of relying on the disillusioned teachings of society.    As the novel develops, we see Huck kidnapped by his father, a drunken byproduct of society's corruption. At first, Huck enjoys the relief from religion and the 'sivilized' life '...it warn't long after that till I was used to being where I was and liked it...' but latter realized he was still trapped in the depressing confines of 'sivilisation'. Huck is subjected to the constant tyrannical treatment inflicted from his father ranging from beatings to being locked up days at a time.

1984-George Orwell How Does the Writer Use Language to Create a Sense of Place?

1984-George Orwell How does the writer use language to create a sense of place? Orwell uses a solemn tone for the foundations of anguish in the extract from Nineteen Eighty-Four. This tone is used to firstly set the scene with the use of adjectives: ‘vile’ and gritty’ to describe the poor weather. These have negative connotations and therefore allow the reader to understand the melancholy and depressing scene that is being set. The effect of the pathetic fallacy when the wind is described as ‘vile’ portrays a comfortlessness of the world around Winston but also reflects his underlying feelings of disgust with it.The irony of the name of his apartment block ‘Victory Mansions’ reiterates these feelings as ‘Victory’ implies happiness and joy when all he experiences is harshness, and ‘Luxury’ implies ease and wealth when he leads a life of dilapidation and squalor. As the description continues into the hallway of his apartment block, the sense of place is addressed by the poster on the wall. It is explained as being ‘too large for indoor display’ and depicting ‘simply an enormous face’.The size of the poster, emphasised by the adjectives: ‘large’ and ‘enormous’ illustrate the true reason for the poster; primarily for control. This shows the sense of state power and oppression of the individual in Winston’s world. This sense of control is emphasised again later in extract when we discover the caption under the poster reads: ‘BIG BROTHER IS WATCHING YOU’. The direct object pronoun ‘you’ personalises the poster to the immediate viewer and therefore along with the presentation of the words being in capitals makes it more effective.Overall the poster therefore shows the hostility of the place where Winston is and their lack of freedom. Orwell gives a realistic portrayal of Winston as he ascends up the stairs to his flat. The ‘varicose ulcer above his right ankle’ could be seen as a manifestation for his repression, and suffering through a life of adversity and turmoil. This is emphasised by the fact that he had to rest ‘several times’, which is very unusual for a man as young as ‘thirty nine’ . This portrays an image of an overworked miserable and lonely man inhabiting a tortured existence. William May

ear 10 Additional Science Holiday Homework

1) What are the two common isotopes of chlorine made up of? There are two types of chlorine atom- one has 17 protons and 18 neutrons(and so has a relative atomic mass of 35) and the other has 17 protons and 20 neutrons(and so has a relative atomic mass of 37). 2) Why was the Haber process such an important invention? Fritz Haber was a German chemist, who received the Nobel Prize in Chemistry in 1918 for his development of synthetic ammonia, important for fertilizers and explosives. The Haber process is the reaction of nitrogen and hydrogen, over an iron catalyst to produce ammonia. The Haber process is important sue to the fact ammonia is difficult to produce, on an industrial scale. The Haber process now produces 100 million tonnes of nitrogen fertilizer each year. 1% of the world's annual energy supply is consumed in the Haber process and that fertilizer is responsible for sustaining 40% of the Earth's population. 3) Find 3 exothermic and 3 endothermic reactions not mentioned in the textbook? An exothermic reaction is one that releases heat. Examples of exothermic reactions: * Adding concentrated acid to water. * Nuclear fission. * Condensation of rain from water vapour. The word endothermic describes a process or reaction that absorbs energy in the form of heat. Examples of endothermic reactions: * Evaporation of water. * Melting solid salts. * Mixing water and ammonium nitrate. 4) Find 2 uses for a thermistor and 2 uses for a LDR. How does the change in their resistance make them suitable for these jobs? Thermistors can be used as replacements for fuses and as heating elements in small temperature controlled ovens. LDRs are used in street lights and clock radios. Change in resistance makes them suitable for their jobs because they change as the resistance changes- they depend on temperature and light. 5) Find the mains frequency and voltage of electricity in the USA, England and France. What does this mean about the safety of them and how possible it is to use an English hairdryer in these countries? France= 230 and 50, England = 240 and 50 and the USA= 120 and 60. This means that it is not safe to use appliances above a certain voltage in that country, and an adaptor must be used if an English hairdryer is to be plugged in. 6) Find out how the lights, sockets and cooker are wired in a house and why they are like this? The lights are in a radical circuit with junction boxes to aid the switching process. Sockets are either in a radical circuit or a ring. Cookers are on a separate fuse because they draw a larger current. 7) How is a lightning conductor like the earth wire in a plug? It is the same because like a lightning conductor, the earth wire will conduct any electricity which it comes into contact with to the ground. 8) Who was Geiger? Geiger was the man who co-invented the Geiger counter which measures the ionising radiation and discovered the atomic nucleus. 9) What evidence was there for the plum pudding model of the atom? Experiments on the beams of particles in a tube that were attracted to a positive charge showed that they must be negatively charged themselves. Other experiments showed that it would take about 2000 electrons to weigh the same as the lightest atom, hydrogen. The tiny negatively charged particles were called electrons. 10) What do the hormones insulin and glucagons do? Insulin converts glucose to glycogen which stops the glucose level form becoming too high, whilst glucagon converts glycogen to glucose to keep your blood sugar levels stable. 11) Find one controversy that is going on at the moment over stem cells. What do you think? Using embryonic stem cells as a clinical therapy for Parkinson's disease. I think this is a good idea even though I do not agree with many other stuff that stem cells could possibly be used for as I thin using stem cells to treat Parkinson's disease and also Alzheimer's will benefit countless amount of people. 12) Describe the famous experiment Gregor Mendel did? Gregor Mendel was a monk who did an experiment on cross-breeding different types of peas to find out that offspring inherited characteristics in clear and predictable patterns. This helped develop the idea of genes and genetic material.

Babe Ruth the Legend essays

Babe Ruth the Legend essays Babe Ruth was born on February 16th, 1895 and died on August 16th, 1948. He loved baseball very much and it all started in Baltimore, Maryland. This is his story! Babe Ruth lived in Baltimore, Maryland. It was very rough for him, because he lived on the streets. His parents did not have a lot of money and they often neglected him, which is why his home was in the streets of Baltimore. He went to St. Marys Industrial School for boys. This school was located in Baltimore, Maryland. His education was both bad and good, but the food in the cafeteria was what really pleased Babe Ruth when he was young. It was not like the food on the streets it tasted much better. Babe was always very generous to his friends. Everyday they would go to the snack place with their earned cash to get treats to eat. Babes failure was in school. He was not a very good student, because his grades were very low and he lacked concentration in class. Many of the kids teased him because he was always so far behind them in learning in school. As Babe grew older he discovered baseball and became really good at it. He soon became known as the Best Home Run Hitter in Baseball. He hit sixty home runs in one year. Once he became a home run champ, known throughout the USA, many people wanted to be his friend. He was now famous. I admire Babe Ruth of his home run fame and for the reasons as follows. So, please listen up? When Babe Ruth was at St. Marys Industrial School, he discovered he was good at one thing, Baseball. Babe became one of the best baseball players there. He loved baseball and he worked very hard at hitting the ball very far. When he grew up an amazing thing happened. He was picked to play professional baseball. He even went to the World Series, where he hit three home runs. The seats in the stadium were full and there were people even stand ...

3 Errors Involving Prepositions

3 Errors Involving Prepositions 3 Errors Involving Prepositions 3 Errors Involving Prepositions By Mark Nichol You are attempting to describe an action, but you can’t remember whether one, say, goes in to the breach or into the breach, or whether one, for example, walks on to the next trail junction or onto the next trail junction. This post explains the respective roles of the operative words and phrases. A prepositional phrase is a phrase that includes a preposition, a word that, as its name implies, comes before the object of a sentence. For example, into and onto are prepositions describing movement in relation to objects in the prepositional phrases â€Å"into the trench† and â€Å"onto the roof.† Because these prepositional phrases provide additional information about an action that occurred (as in the sentences â€Å"She leaped into the trench† and â€Å"The boy climbed onto the roof†), they serve as adverbs. We usually think of adverbs as single words (as in â€Å"She leaped impetuously† or â€Å"The boy climbed quickly†), but adverbs can consist of two or more words, which appear without any additional information or combined with one-word adverbs, either adjacent to each other or separated by the subject and the verb (as in â€Å"She leaped impetuously into the trench† or â€Å"Quickly, the boy climbed onto the roof†). â€Å"In to† and â€Å"on to,† by contrast, each contain two distinct parts of speech: an adverb followed by a preposition. In and on follow a verb to provide additional information about it, and to precedes the object that follows the verb and its adverb, as in â€Å"She leaped in to search the trench† and â€Å"The boy climbed on to get a better look.† In the following examples, a preposition is mistakenly employed in place of an adverb-preposition compound consisting of the same letters as the preposition. After each sentence, a discussion, followed by a revision, explains the error. 1. His wife, under the assumption that she’d never see him again, has moved onto another man, and they’re planning on getting married. The prepositional phrase â€Å"moved onto† implies that the woman has literally relocated herself on the man’s body. However, â€Å"moved on to† includes the idiomatic phrase â€Å"moved on,† meaning â€Å"transitioned†: â€Å"His wife, under the assumption that she’d never see him again, has moved on to another man, and they’re planning on getting married.† 2. His job is not to give into the demands of multimillionaire celebrities pushing a social agenda. The use of into implies an entrance, but the key of this sentence is the idiom â€Å"give in,† meaning â€Å"submit,† so into must be broken up into its constituent parts: â€Å"His job is not to give in to the demands of multimillionaire celebrities pushing a social agenda.† 3. The cell phones were turned into the authorities. Here, into preceded by turned suggests a transformation, rather than the act of turning in, or handing over, so again, in must be separated from to to form part of the phrase â€Å"turning in†: â€Å"The cell phones were turned in to the authorities.† For a more detailed discussion about this issue, see this post about prepositions. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Grammar category, check our popular posts, or choose a related post below:Coordinating vs. Subordinating Conjunctions75 Idioms and Expressions That Include â€Å"Break†Oppose and Opposed To

Low Cost Airlines Case Study Example | Topics and Well Written Essays - 1750 words

Low Cost Airlines - Case Study Example based on variance of services, has been the entry in the industry of Low Cost Airlines. The Southwest airline initially started its operation with short-haul destinations i.e. less than 1,500 km, and at present the company has increased its activities beyond the initial values. It has introduced new airplanes into operations, but initially it was particular number of airplanes which were on continuous run. The performance of the Southwest airline has been encouraging due to adoption of effective techniques, the company recorded net profit of USD 413 million in 2001, which is lower than in 2000, but the company was the only profitable airline in United States in 2001. Southwest has planned to create more than 4,000 jobs in 2002. The company at retained low unit costs (costs per ASM): 7.66 cents in 2001, against the cost of 7.73 cents in 2000. The Southwest Company has kept safety as important criteria for the evaluation of its operations, and this is an important aspect of management with reference to Health and Safety, the practice is not widely popular among other low cost airlines, and therefore the Southwest has successful to retain maximum market shares. According to Carlton, the company has complied by the International and National standards of safety and operations, and has invested sufficient amount in this regard. The company's most important management has been its adherence to quality service, and this is termed as an important strategic element for the company. The company purchased Boeing 737 to capsulate required stand-by crews, lower training and maintenance cost. The company has involved its aircraft into continuous operations i.e. higher aircraft utilization. As a result, South West's utilization rate is 7.1 hours. (Carlton, 2000) Southwest has adopted different and effective mode of service, which is of great relevance, the airline has introduced an innovation distribution system through Internet, and telephone and travel agency i.e. traditional modes. The airline has further adopted strategies based on horizontal product differentiation that has proved to be important competitive element for the Southwest. The horizontally differentiated products have no classification of the particular product and brand in terms of qualities. The success of the Southwest Airline has been the function of its ability to introduce and maintain minimum operating cost, and implementation of pricing strategies which have attracted different segments of consumers and have increased the load factors of carriers, which has further contributed towards sustenance of minimum cost. According to Clemons, the airline has preferred its operations in the regional airports, and which is based on strategic considerations, and subsequently the price factor. (Clemons, 2001) Southwest is considered to be the leader among the Low Cost Airlines, and the airline has professional edge over its competitors. The airline has adopted following measures to ensure that the traveling cost can be reduced significantly, for the convenience of the traveler and company's expenses. IN Varian has appreciated the plan, according to which, the Airline offers no meals, drinks, and snacks for free, and narrow seating arrangement has been adopted, the company offers no services for the