Joseph Henry Essay -- essays research papers fc

Joseph Henry   Ã‚  Ã‚  Ã‚  Ã‚  Joseph Henry lived from 1797 to 1878. Of Scottish decent, Henry was a son of a day laborer in Albany, New York. He was sent to live with his grandmother as a small boy in a village about 40 miles from Albany. At the age of thirteen, be became apprenticed to a watchmaker. He then became interested in theatre and was offered employment as a professional actor, but instead he attended Albany Academy where he was provided with free tuition. He has always been interested in science and by 1823 his education was very far advanced that he was assisting the teaching of science courses. By 1826, after a shift as a district schoolteacher and as a private tutor, he was appointed Professor of Mathematics and Natural Philosophy at Albany Academy. With all these titles and positions eh received, Joseph Henry still managed to do important scientific experiments.   Ã‚  Ã‚  Ã‚  Ã‚  Joseph Henry became specifically interested in terrestrial magnetism. His interest in this led him to experiment with electromagnetism. His apprenticeship as a watchmaker stood him in a good stead in the construction of batteries and other contraptions. Although there had been other physicists who had observed the magnetic effects from electrical currents, Henry was the first to wind insulated wires around an iron core to obtain powerful electromagnets. Before he left Albany, he built one for Yale that would lift 2,300 pounds, which was the largest in the wor...

The Female Reproductive System :: essays research papers

The reproductive system is one of the most vital systems because it determines whether a species will survive. The reproductive system produces human offspring. One of the most prevalent diseases of the reproductive system is prostate cancer. Prostate cancer occurs when the cells of the prostate begin to grow and divide uncontrollably. One out of six men will be diagnosed with prostate cancer in the United States. Some of the key parts of the reproductive system are to learn how a female egg is fertilized by a male sperm cell, about the parts of the male and female reproductive system and learn about prostate cancer. The male reproductive system works to create sperm and then release it into the female during sexual intercourse. The organs in the system are the testes, the epididymides, hanging in a skin bag called the scrotum, the sperm ducts, the prostate gland, and the penis containing the urethra. The testes are also known as sperm glands. They make tiny sperm cells called spermatozoa. They also produce hormones especially testosterone (this activates the production of sperm cells). Epididymides are tightly coiled tubes on each side of the testes. They help sperm become mature. The sperm ducts carry fresh sperm towards the outside. The ducts join with the urethra inside of the prostate. The urethra carries the sperm through the penis to the outside. This pathway is also known as the male reproductive tract. The parts of the female reproductive system work together to produce pin- head size eggs that join with a male's sperm to fertilize one of the eggs. The system nourishes the egg until it forms a full-grown baby. Then, once the baby is born, it produces milk for the baby. The main parts of a female reproductive system are the ovaries, the oviducts (also called the fallopian tubes), uterus (womb), vagina, vulva and the breasts (where the milk for the baby is released). The ovaries are called "egg glands". They store tiny eggs called ova. These will develop into a baby, if a man's sperm fertilizes them. The ovaries also produce hormones. The two oviducts each link the two ovaries with the uterus. They carry the ripe eggs to the uterus. When a male fertilizes a female's egg, it usually occurs in the oviduct. The uterus is where the fertilized egg grows and is nourished until it is ready to come out. At first, the uterus is about the size of a baseball or a tennis ball.

Costs and Price

Week I Quiz Results/Answers ECO561 1. Revenue increases when * producer surplus increases 2. An increase in the price of an inelastic good * increases revenues 3. Price elasticity of Demand increases when * people become less price sensitive over time 4. The purpose of a market in a market system is to * bring buyers and sellers into contact 5. By specializing in the production of one good, a company is able to benefit from economies of scale which increases its revenue. Which of the following is an attribute of specialization? * Saving time by allowing a worker to focus on one task . The market system promotes progress by * providing incentive for technological advances 7. Productive efficiency is achieved when * the best technology is used 8. The market is said to be in equilibrium when * neither a shortage nor a surplus exists 9. The market will move to a higher equilibrium price if * the increase in demand is greater than the increase in supply 10. The intersection of supply and demand will be at a lower equilibrium price but a higher equilibrium quantity if * demand is constant and supply increases 11. When a price ceiling occurs the market price will be lower than the equilibrium price 12. Because the goals of firms, entrepreneurs, and workers have different incentives, which of the following principles applies? * Self-interest Week 2 Quiz Results/Answers ECO561 1. Purely competitive firms increase total revenue by * increasing production (To increase revenue, firms look to increase price or quantity, as price multiplied by quantity equals total revenue. Purely competitive firms can sell as much as they want at the market price. Adding additional units of the product does not result in a change in the market price.Therefore, since purely competitive firms do not influence price, they increase total revenue by increasing quantity). 2. What are two ways for a competitive firm to determine the optimal level of production, that is, the level of production tha t will maximize profit or minimize losses? * Comparing total revenue to total cost or marginal revenue to marginal costs (A firm can look at two factors when considering whether it is maximizing profit or minimizing losses. First, it can find the maximum difference between total revenue and total cost.Second, a firm can look at the additional revenue gained from selling one more unit and at the additional cost from producing that additional unit. As long as the additional revenue from selling one more unit is greater than the cost of producing that unit, the firm will continue to increase its revenue. If the additional cost of producing another unit is greater than the additional revenue generated by selling that additional unit, the firm takes away from its total profit; this is the difference between revenue and cost.Thus, a firm maximizes its profit by producing at the point where marginal revenue equals marginal cost. Before that, additional profit can be generated, while after that, the firm reduces it overall profit). 3. Suppose that a firm determines that its marginal revenue is greater than its marginal cost, it would be better to * increase production (Inelastic goods are necessities that consumers continue to purchase even when the price increases. This increases the revenue, as more is paid for each good. The percentage change in price increases faster than the change in quantity, which may remain constant.When more is paid for a good or a service, revenue increases). 4. It is profitable for a firm to continue employing additional resources as long as * Marginal Revenue Product >= Marginal Resource Cost (As with the optimal level of production for a good, the optimal usage of a resource is determined by ensuring that the revenue from that resource is at least equal to the marginal cost of that resource) 5. As additional units are produced, the marginal revenue product falls for all firms because marginal product decreases.For firms operating in indu stries that are not perfectly competitive, marginal revenue product also falls because * product price falls as output increases (While perfectly or purely competitive firms must accept the price set by supply and demand in the market, firms facing other market structures have some control over the price they set for their products. However, to increase the quantity demanded of their product, they must decrease their price. In doing so, while some firms may have the ability to set different prices for different groups, called price discriminating, most firms cannot.As a result, the firm must lower the price on that good for all consumers; therefore, the product price falls as output increases) 6. All things being equal, an increase in demand for a product†¦ * increases demand for the resources used in its production (When a firm sees an increase in the demand for its product, it will increase its production. In doing so, the firm increases the demand for the resources it uses t o produce its product. An increase in demand for a product does increase the quantity supplied. The firm sees that it can increase the price on each unit to address the shortage that emerges, so there is more sold.This does not mean that the firm changes the amount of production at the original price) 7. Marginal cost can be defined as the addition to _____ of one more unit of output. * total variable costs (Marginal cost measures the cost of producing the next unit. Because fixed costs do not change with additional output, they do not add to total fixed costs. In addition, while average costs—both total and fixed—change with additional levels of output, as average costs are divided by the quantity produced, they do not reflect the full addition to the cost.Thus, the cost of producing an additional unit reflects the additional cost of inputs needed for production (variable costs). 8. If a firm starts small and, over time, builds successively larger plant sizes or adds additional work space in an office, average total costs are most likely to * initial decrease then increase 9. Demand for resources, including labor, depend on its * productivity While being profitable, available, and accessible are relevant to the demand for resources, the productivity of the resource in question determines how profitable the good or service will be. 0. The primary difference between increasing- and decreasing-cost industries lies in * the fact that the average total cost (ATC) of firms in increasing-cost industries will first decline and then eventually increase with output, while decreasing-cost firms experience progressively lower ATC with increased output (By definition, an increasing-cost industry experiences a rising ATC as output increases, while a decreasing-cost industry enjoys a lower ATC as output increases. 11. When adding labor or other factors of production, businesses may see their total product rise, but see their per-unit increase in return for eac h additional unit diminish. This phenomenon * is known as diminishing marginal product and has general market application (The diminishing marginal product theory states that the marginal product decreases as a firm, introduces one new input into production while holding all other inputs fixed. ) 12.In the short run, firms should shut down if The correct answer is A. AVC > P. In the long term, a firm wants to receive a price greater than the cost of production per unit: average total cost. In the short term, a firm may have bills, regardless of whether it is producing anything. For example, a firm may have signed a long-term lease or may have other contracts it is obligated to pay. These costs are generally fixed costs that do not vary with the level of production.However, firms also have a variety of other costs that are only incurred if the firm is producing: variable costs. Thus, in the short term, a firm should determine how to minimize the costs it will face, such as closing do wn and only paying the fixed costs or continuing to operate and incurring both the fixed costs and variable costs but offsetting the variable costs and some of the fixed costs with the revenues earned from production.If the price is less than the average variable cost, then only some of the variable costs will be covered and all of the fixed costs are incurred; therefore, the firm is spending more by continuing to operate rather than shutting down. 13. When you are considering the value of a resource in its next best use, you are considering its * opportunity cost Opportunity cost is defined as the value of the next best use of the resources. In economic terms, opportunity costs include both the explicit costs of production and the implicit costs of production. 14.Of the four major market structures—perfectly competitive, monopolistic competition, oligopoly, monopoly— reducing variable costs of production * enhance profit per-unit, because profit equals revenue minus c ost (Under all market structures, the profit maximization rule stays the same, that is MC = MR. A cost reduction in all cases reduces the MC and increases the profit margin. ) Week Three Quiz Results ECO561 1. | Answered| | 2. | Answered| | 3. | Answered| | 4. | Answered| | 5. | Answered| | 6. | Answered| | 7. | Unanswered| | 8. | Unanswered| | 9. | Unanswered| | 10. Unanswered| | 11. | Unanswered| | 12. | Unanswered| | 13. | Unanswered| | 14. | Unanswered| | ————————————————- Top of Form Bottom of Form 1. | Answered| | 2. | Answered| | 3. | Answered| | 4. | Answered| | 5. | Answered| | 6. | Answered| | 7. | Unanswered| | 8. | Unanswered| | 9. | Unanswered| | 10. | Unanswered| | 11. | Unanswered| | 12. | Unanswered| | 13. | Unanswered| | 14. | Unanswered| | ——————————————†”—- Top of Form 7. Marginal cost can be defined as the addition to _____ of one more unit of output. Bottom of Form

Distracted Driving Essay

Recently â€Å"Texas college student Chance Bothe’s last words prior to driving his truck off a cliff were in the form of a text message: â€Å"I need to quit texting, because I could die in a car accident.† He miraculously survived, but Bothe’s story has become an ironic example of the dangers of texting while driving† (Zafar). Distracted driving has become a worldwide problem that is ending/injuring the lives of hundreds of thousands of innocent people each year. â€Å"A statistic from 2009 declares that in the United States alone 5,474 people were killed on roadways and an additional estimate of 448,000 were injured in motor vehicle crashes that were reported to have involved distracted driving† (Aldana). Distracted driving is causing many unnecessary and unintended fatalities and injuries among the drivers and passengers of motor vehicles in the world today; these incidents can be easily avoided if the education of distracted driving is conveyed to all those in possession of a license to operate motor vehicles and the laws being put in place to avoid it are followed and enforced by all. In recent years distracted driving can almost be described as a pandemic outbreak with only negative effects on the lives of many humans. Some may ask what is the exact definition of distracted driving it is as follows: â€Å"distracted driving is any activity that could divert a person’s attention away from the primary task of driving. Any type of distraction endangers the drivers, passengers, and bystanders safety† (What is Distracted Driving). Drivers are not only responsible for their own safety when operating a vehicle but also for their passengers and those in other vehicles around them on the road. When driving, the driver must maintain the three aspects of driving focused on the road these are visual, manual and cognitive (Injury Prevention & Control: Motor Vehicle Safety). Visual is the driver’s ability to see everything occurring around him or her on the road. It is known that it is the driver’s responsibility to keep his or her eyes on the road at all times to make sure there is no prevalent danger that  may occur to anyone. Manual is making sure the driver keeps one or both hands on the wheel while it is being operated; which is also common knowledge to all drivers because it is how it is taught during driver’s education and is a major part of passing the license exam. Lastly cognitive is the driver’s awareness of his or her surroundings while on the road so he or she is able to make smart decisions. One should not be thinking of anything other than the road in front of them when operating a motorized vehicle. When the topic of distracted driving comes up in conversation it is usually never a good thing, but the typical first thought of any person is texting while driving. Which is â€Å"by far the most alarming distraction while driving because it requires visual, manual, and cognitive attention from the driver,† (What is Distracted Driving) consequently meaning all three aspect which should always be focused on the road are taken away making the driver almost blind and oblivious to the road. Texting while operating a vehicle is positively the worst distraction because it has been calculated by scientists that when a driver is â€Å"sending or receiving a text message he or she takes their eyes off the road for an average of 4.6 seconds, the equivalent of this, at fifty-five miles per hour, is driving the length of a football field† (Distracted Driving 2009). Just imagine how many things could go wrong in that amount of road, especially at that speed a great deal of serious damage and possibly even death could result from just that one text message. However, there are also many other devices and actions the driver may partake in to diverge his or her attention away from the road such as â€Å" using cell phone or smart phone, eating and drinking, talking to a passenger, grooming, reading (including maps), using a navigation system, watching a video and adjusting a radio, CD player or MP3 player† (What is Distracted Driving). All these activities are common among every person while driving. Some of these activities being so common for people to do in a car, that some do not even think of them as distracting while operating a motor vehicle, especially the ones where the driver is only eating, drinking or just talking to the passenger. But when we think about it after hearing so many of these statistics we can see how many elements that are crucial to driving can be impaired by some simple multi tasking by the driver to save  some time through their day or just making naà ¯ve conversation. With today’s technology world constantly improving and becoming more popular among the world’s people, both older and younger, it comes with its negative effects of increasing the rates/statistics of distracted driving accidents. This is proven by the statistics taken by the Center of Disease Control Prevention, displayed in their document Injury Prevention & Control: Motor Vehicle Safety, which states the proportion of drivers reported to have been distracted at the time of a fatal crash has increased from seven percent in 2005 to eleven percent in 2009. Although many may not view this as a huge percent in the first place and maybe no a big increase either, but the though of how simple it is to fix this problem but many are not willing to do so. Another statistic from 2010 of a national telephone survey on driver distraction shows results of more than three quarters of drivers reported that they are willing to answer calls on all, most or some trips; yet feel unsafe when riding in vehicles in which the driver is texting (Aldana). These negative increases in statistics are surfacing the dire need to educate the public on the hard facts of distracted driving. The solution being proposed by many organizations today is to educate drivers of the dangers distracted driving poses not only to driver but also to other drivers, passengers and pedestrians. Although, with this solution comes the responsibility of the people to help spread the education they learn and also help enforce others to act on their new knowledge when operating a motor vehicle. In the two cities of Hartford, Connecticut and Syracuse, New York multi-market efforts were made in 2011 to decrease the rate of distracted drivers (Aldana). These pilot projects found dramatic declines in distracted driving, with texting dropping seventy-two percent in Hartford and thirty-two percent in Syracuse (Aldana). Since these pilot projects have shown such a great decrease in distracted driving, which also shows a decrease in motor vehicle accidents, proves effectiveness of educating drivers to be aware of the dangers of distracted driving. Now that it has proven to improve distracted drivin g rates many states are taking action against texting while driving. Also well-known figures of today’s world such as President Obama are getting involved; on September 30, 2009 he issued an executive order prohibiting federal employees from texting while driving on government business or with government equipment (Injury Prevention & Control: Motor Vehicle Safety). Also â€Å"on October 27, 2010 the Federal motor carrier Safety Administration enacted a ban that prohibits commercial vehicle drivers from texting while driving† (Injury Prevention & Control: Motor Vehicle Safety). With the help of these well known figures and the laws being put in place the hopes of decreasing distracted driving rates is slowing becoming a reality. It is seen in recent statistics that many people including average people and even ones in high federal government positions and also state governments are partaking in the challenge to help end distracted driving among all those around them. The public is beginning to be immersed in the education of distracted driving. They are being taught about all the dangers and hazards it can cause not only in one life but of all those it may affect. As of right now, nation wide there are thirty-nine states plus the District of Columbia, the Virgin Islands and Guam which have all ban texting behind the wheel; Also ten of the thirty-nine states, the District of Columbia, the Virgin Islands and Guam have even gone further by prohibiting all hand-held cell phone use while driving (Aldana). These new laws are in fact decreasing distracted driving rates, however, they are not working at their maximum potential. The new laws also need the support of the people to help enforce these laws on all those they have influence on. With the people of the world working with the newly enacted laws being put into place soon the fatality and injury rate due to distracted driving will surely decrease and no longer have to be such a stress on those who are on the road. Everyone in the world can save many lives just by simply waiting to do any one of the distracting actions at a time which it is appropriate and safe so no harm will come to the driver or anyone else on the road. Works Cited Aldana, Karen. â€Å"Blueprint for Ending Distracted Driving.† Distraction.gov. NHTSA, 07 2012. Web. 15 Oct 2012. . . â€Å"Distracted Driving 2009.† Traffic Safety Facts. Department of Transportation, n.d. Web. 15 Oct 2012. . . â€Å"Injury Prevention & Control: Motor Vehicle Safety.† CDC. Center for Disease Control and Prevention, 09 2012. Web. 15 Oct 2012. . . â€Å"What is Distracted Driving?.† Distraction.gov. NHTSA, 05 2012. Web. 15 Oct 2012. . Zafar, Aylin. â€Å"Man Texts About Needing to Stop Texting, The Drives Off a cliff.† Time. Time, 05 2012. Web. 15 Oct 2012. .

Economic philosophies Essay

This paper will focus on the contributions of John Maynard Keynes and Milton Friedman to economic philosophies. Keynes is considered by many as the most famous and influential economist. Though having that veneration, a number of economists had been in opposition to the Keynesian school of thought. Among the forefront oppositions to the Keynesian economic philosophy is Milton Friedman, along with his accounts on monetarism. In his â€Å"General Theory of Employment, Interest and Money,† Keynes laid out the foundations of his framework, which nearly all macroeconomists make use of today. This framework finds its basis on spending and demand, the factors that determine the components of spending, the liquidity-preference theory of short-run interest rates, and the necessity of the government to make strategic but powerful interferences in the economy in order to keep it on balance and avoid the extremes of depression, as well as manic excess (Delong, 2006). Keynes’ theory was said to be incomplete as it only deals with interest employment and money. There was no mention on the theory about prices. Friedman introduced the principles of prices and inflation to Keynes’ framework, based on the idea that there exists a natural rate of unemployment. Friedman also made mention of the limitations of government policies have with regard to the stability of the economy, taking into consideration the trend of its long-run growth. Friedman considered these as limits beyond which an intervention from the government would trigger an inflation of uncontrollable and destructive nature (Delong, 2006). The events that took place during the Great Depression made Keynes and his orthodox followers to underestimate the influence and role monetary policies have in making a viable solution (Delong, 2006). Keynesians are inclined to prefer fiscal policy to monetary policies as a tool to influence production and employment. They believed that money has no direct influence. Moreover, they question the power of monetary policies to influence employment and production (McCain, 2007). The Great Depression was indeed considered to be a unique event in history, which called for explanation in terms of events rather than in pursuit for a new line of economic theory. One of the events that took place during the Great Depression was the failure of the money and banking system. Thus, the Great depression illustrates the influence of changing monetary conditions (McCain, 2007). Keynes and Friedman both agreed on the necessity of a superb macroeconomic management. The private economy, when on its own, might be subjected to unbearable instability and that there is a necessity for a powerful, strategic, but limited intervention coming from the government in order to maintain stability within the economy (Delong, 2006). Though having these ideas in agreement, Friedman had been a staunch opposition to some of Keynes’ economic principles. According to Keynes, the key to maintaining economic stability is to keep government spending and private investments on stable grounds. Friedman, on the other hand, opined that the key to economic stability is keeping money supply, i. e. the amount of purchasing power, which are readily available to be spent by businesses and households stable (Delong, 2006).

Nursing research Essay Example | Topics and Well Written Essays - 250 words - 11

Nursing research - Essay Example In addition, it can also be determined by whether it has measured what it is intended to measure in this case the measure being the face value of data, the content validity of the data, and  by  a panel of judges. In this case, the judges use their opinion to determine whether the tool measured its conceived measure (Wood & Ross-Kerr, 2010). On the other hand, the validity of an instrument can also be determined using pragmatic measures that test the practical value of an instrument while focusing on the research questions. With constant determination of a tool or instrument as valid, there is no need for a researcher to test the reliability of an instrument. Nonetheless, there are three ways to determine the testing of the reliability of an instrument. First, reliability can be determined through testing the stability of the tools by producing dependable results overtime. On the other hand, the second approach involves the test for equivalency. A test for equivalency involves te sting whether the instrument was consistent while used by independent researchers. Finally, the test for reliability may involve testing the internal consistency of a tool by determining whether the measure of the consistency of the tool is in all parts (Wood & Ross-Kerr,

Dynamic Host Configuration Protocol Term Paper Example | Topics and Well Written Essays - 2000 words

Dynamic Host Configuration Protocol - Term Paper Example Advantages/ Benefits of DHCP 1. minimized IP Address configuration errors as is attributed with the manual IP address configurations to computers 2. Network administration tasks are reduced since the TCP/IP configurations are now centralized and automated, it’s easy to handle efficiently ip addresses for client machines whose IP addresses change frequently i.e. devise on wireless network. 3. There is no address duplication since there’s automatic assignment of IP addresses. Significance of DHCP All devices on a TCP/IP-based network are required to have unique IP addresses to help the computers access the network and share resources. Without using a DHCP, it means that IP addresses must be reconfigured anytime a computer is added or moved to a different subnet and similarly the IP addresses be reclaimed when a computer from the network. DHCP on the other hand comes in handy by automating the entire process as well as central management of the same. The DHCP protocol is c ontained in the DHCP server which holds a pool of IP addresses and leases the given IP addresses to client machines which join the network. It uses the concept of ‘lease’ or time length that a particular IP address remains valid. The DHCP is an extension of BOOTp protocol which is an earlier network IP management protocol. Implemeting a DHCP eliminates some of configuration problems associated with manually configured TCP/IP. Some of the parameters that are passed to a DHCP client include: The clients IP address A subnet mask Default gateway Domain Name Servers Network servers Time synchronization information. Manual TCP/IP addressing Configuration The limitations of configuring TCP/IP manually mean that: 1. It’s easy for users to pick a random IP address instead of getting a valid IP address. These incorrect IP addresses lead to network problems which become difficult to trace 2. Manually typing of IP addresses, subnet masks or default gateways leads to communic ation problems if the credentials are wrong. 3. There are administrative overheads on internetworks when computers are frequently changed between subnets. How DHCP works DHCP server offers an automated method for IP address distribution and updating on a given network. The server offers this information to the particular client through a series of message exchanges called DHCP conversations or DHCP transactions. For communication on different subnets, a DHCP relay agent is preferred to aid the conversation. DHCP Architecture A DHCP architecture consists of DHCP servers, DHCP clients and DHCP relay agents. The DHCP client is a network-enabled device that enables the communication with the DHCP server for the purpose of getting a dynamically leased IP address. DHCP is supported in the following operating systems: Windows NT version 4, Windows 2000, Windows XP, Windows server 2003, windows 98, windows ME. The DHCP Server is in charge of maintaining the scope, reservations as well as op tions as set by the given administrator. Configuring a DHCP client Normally the DHCP client TCP/IP software is never configured with a static IP address but instead configured to get/obtain the IP address dynamically from the DHCP server. The leasing process of TCP/IP configuration involves the following four steps: DHCPDISCOVER-the DHCP client will broadcast a DHCP discover message that contains its specific MAC address as well as the computer name in attempt to request for an IP address from