Positive Feedback Amplifier Essay Example

Positive Feedback Amplifier Essay FEEDBACK AMPLIFIER FEED BACK: The process of applying a fraction of output energy of some device back to the input known as feedback. FEEDBACK AMPLIFIER: The amplifier using feed back process is called feedback amplifier. TYPES OF FEEDBACK AMPLIFIER: There are two types of feedback amplifier: a)Positive feedback amplifier b)Negative feedback amplifier POSITIVE FEEDBACK AMPLIFIER: >The amplifier in which feedback energy is applied in the same polarity or in same phase is called as positive feedback amplifier. increases the voltage gain of mplifier. his distortion is more. has increased instability. seldom used as an amplifier. Mostly used in oscillator. NEGATIVE FEEDBACK AMPLIFIER: >The amplifier in which feedback energy is applied in the opposite polarity or out of phase with input is called negative feedback amplifier. decreases the voltage gain. this distortion is less. is more stable. is mostly used as an amplifier. PRINCIPLE OF NEGATIVE FEEDBACK AMPLIFIER: >Block diagram of negat ive feedback amplifier: >A=Voltage gain without feedback. Af=Aoltage gain with feedback. Vi=lnput signal to be amplified. Vo= Output signal of amplifier Vd=Actual input signal to the amplifier. Vf= Feedback signal applied to input side. m=feedback fraction >From block diagram it is clear that, m=VfNo i. e. Vf=mVo Again A=VoNd i. e. i. e. Vo=AVi-AmVo i. e. Vo+AmVo=AVl i. e. Af=l /(! +mA) OF NEGATIVE FEEDBACK AMPLIFIER: 1 -Resultant gain is independent of transistor parameters or supply voltage fluctuation. Hence gain is stable. 2-lt reduces non-linear distortion by a factor (1 +mA). 3-lt improves frequency response. 4-lt increases circuit stability. lt increases input impedance decreases output impedance. INPUT IMPEDANCE OUTPUT IMPEDANCE WITH FEEDBACK: >Figure shows the block diagram: >Given that: Zi=input impedance without feedback=Vd/i1 Zif=lnput impedance with feedback†Wil Zo=Output impedance without feedback Zof=output impedance with feedback il †input current >From block diagram it is clear that Now Or VI/ It is clear that input impedance with feedback increases by a factor (1 +mA). Si milarly, it can be derived that output impedance without feedback decreases by a factor 1 +mA). . e. +mA) EMITTER FOLLOWER: *It is a current amplifier that has no voltage gain. * It is a negative current feedback circuit. *It has high input impedance low output impedance. *It is used for impedance matching. *It is also known as common collector amplifier. *Circuit diagram: *Circuit details: It consists of transistor Q, biasing resistor Rl R2, emitter resistor RE, input coupling capacitor Cin, biasing supply +VCC, output coupling capacitor CC. Emitter resistance RE acts as the load a. c. output voltage Vo is taken across RE. We will write a custom essay sample on Positive Feedback Amplifier specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Positive Feedback Amplifier specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Positive Feedback Amplifier specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Here biasing is provided by voltage divider method. lt has no collector resistance no emitter bypass capacitor. *Operation: ac emitter current produces an output voltage across RE. This voltage opposes the input voltage, thus providing negative feedback. The output voltage Vo is equl to input voltage i. e. output voltage follows the input voltage. Hence the name is voltage follower. CHARACTERISTIC OF EMITTER FOLLOWER: *No voltage gain. Practically close to one. *It has high current gain power gain. *Input output ac voltages are in phase.

Albert Biersta essays

Albert Biersta essays For more than a century, Albert Bierstadts sweeping canvases of snow-capped mountain ranges, radiant sunsets, colorful Indian tribes, and buffalo roaming the plains have captured the public imagination with a Romantic vision of a vast and beautiful continent waiting to be seen, explored, and conquered. Today that splendid wilderness is all but vanished, and with its passing Bierstadts portrayals of the beauty and drama of the Western landscape take on fresh meaning for a new generation of Americans. On January 7th, 1830, in Solingen, Germany, a small town a few miles inland from Dusseldorf, Christina Bierstadt gave birth to her sixth son, Albert. At the time Germany was still recovering from the Napoleonic Wars making it a far from ideal place to raise children. So two years later the Bierstadt family left their home and sailed to America in hopes of a better life. They arrived in Bedford, Massachusetts on February 22, 1832. Soon after their arrival Alberts father, Henry, set up a cooperage shop (a woodworking business that was part of the whaling industry). Alberts two brothers bother followed in their fathers footsteps while Albert choose his own path. It is said that Albert worked at a frame shop, if true this is probably where he first became interested in art. In recorded history, Alberts art career began May 13, 1850, with a publication of an offer to teach monochromatic painting. Soon after the artist had his own studio and began to show his work. Albert was a realis t and painted with oils on Canvas. In 1853, at the age of 23 Albert returned to his hometown of Dusseldorf, Germany to study art. He traveled the Westphalia countryside studying his surroundings, taking notes, and sketching everything the caught his eye. He returned to Dusseldorf that fall where he set to work on large canvases composing and putting together parts of studies he had made. Albert received training and encouragement from fel...

Strategic Management in Amazon Essay Example | Topics and Well Written Essays - 2500 words

Strategic Management in Amazon - Essay Example In 1995 a company was born called Amazon.com which started out as online bookstore. Amazon.com became very popular in its niche of online books sales due to its large inventory book selection and prices that were below market value. Towards the end of the decade the .com bubble occurred and many e-stores when out of business, only the strongest players survived. Amazon was one of the e-retailers that survived the bubble due to its customer centric approach, great levels of service, low prices and good variety of items. As the 21st came upon us Amazon.com changed its strategic focus and decided to diversify to expand its product selection to other areas outside the typical products at a book store. This report provides an internal and external analysis of Amazon.com during the middle par of the 21st century. It then provides a strategic outlook based on the reality of Amazon in 2008. A SWOT analysis is marketing strategic tools that analysis internal and external factors affecting the operation of a corporation. The strength and weakness variables are used to perform an internal analysis of the company, while the opportunities and threats variables involved and external analysis of the environment (Kotler). One of the biggest strengths Amazon.com has developed over the years is a strong brand identity among consumers worldwide. In its core business division its online bookstore Amazon has a strong reputation for providing value and excellent customer service. The company has able to develop its human capital and organizational knowledge of ecommerce since it entered the market 13 years ago. The company experience has been achieved through a learning curve in which they learned from their mistakes. The firm’s diversification strategy allowed Amazon.com to have the distinction of having the world largest collection of goods and services. Establishing such a wide range of product and service offering increases a company’s changes of

Computer cables Essay Example | Topics and Well Written Essays - 250 words

Computer cables - Essay Example signs of UTP cable interference include loss of cable data, current drainage, attenuation, corruption of data, and delays in signals (Faber & Rybinski, 2015). However, we can alleviate UTP cable interference by adopting wire  transposition and by balancing the cable, using media filters (Faber & Rybinski, 2015). Three prominent 802.11 wireless standards apply in various homes and businesses. The 802.11a wireless standard accommodates signals that broadcast on multiple frequencies (IEEE, 2015). 802.11a operates on a 5GHz range and a bandwidth of 54mbps. 802.11a is very expensive. The 802.11b  wireless standard operates 2.4GHz range and presents 11mbps of bandwidth (IEEE, 2015). It is cheaper than the 802.11a wireless standard. Additionally, 802.11g is the dominant 802.11 wireless standard and costs the same as 802.11b. Just like 802.11b, 802.11g standard operates in 2.4GHz range (IEEE, 2015). Notably, the 802.11g standard has two times the speed of 802.11a. Some common sources that interfere with these networks include reflected radio frequencies, radar signals, cordless phones, and Bluetooth interference. However, we can troubleshoot these wireless networks by looking for internet connections, and wireless network adapter (Walton, 2015). Walton, A. (2015). What Should You Check First When Troubleshooting Wireless Connectivity Issues? Chron. Retrieved from

Problem solving Case Study Example | Topics and Well Written Essays - 250 words - 2

Problem solving - Case Study Example d, 2015), the job vacancy at Connections of New York require the applicant to demonstrate superior knowledge of Oracle database features, tuning and design methodologies (Connections of New York, 2015). The other difference is that the senior NoSQL/MySQL database administrator is to be responsible for engaging in assembling, managing, and maintaining a heterogeneous database environment in the technical operations group (Softworld, 2015). On the other hand, the position of a senior oracle database administrator requires a person with proven technical and architect skills who have the ability to communicate effectively with developers along with other teams of database administrators (Connections of New York, 2015). At Connections of New York the database administrator is tasked with managing and maintaining all Oracle production and non-production databases, design and fix the functioning of the backup and recovery on DBMS, optimize Oracle database resources for optimum database perf ormance, maintaining Oracle availability on various platforms, carrying out short-term and long-term database analysis, creating database administration polices, mentoring database developers on new database technology, and finally, designing and implementing standards for monitoring (Connections of New York, 2015). On the other hand, the database administrator at Softworld is responsible for ensuring data systems are operating smoothly, writing and performing DDL as well as DDL as needed, audit different databases to ensure integrity, carrying out upgrades, working with the data engineering team, and managing storage restructuring as needed, installing patches as required, and deal with database situations, such as queries run amok, replication, and stale stocks (Softworld, 2015). The average salary for a senior database administrator in New York is $ 122,271 annually, according to the United States Department of Labor. Connections of New York. (2015). Database Administrator Senior,

Methods for Increased Discernment of Deception

Methods for Increased Discernment of Deception Getting to the Truth A Review of Information Gathering for the Purpose of Establishing the  Veracity of Certain Events with Recommendations for Application In consideration of the not simply punishing the guilty but in addition, for the purpose of the prevention of further crime, law enforcement officials have a significant need for information from witnesses and suspects. This information must, above all, be accurate and it must be gained by a legal means in a means that can be implemented often without extensive personnel or expense in a timely manner. Interestingly enough, despite the general regard of being regarded as â€Å"experts† and â€Å"professionals† in the information gathering business and despite varying degrees of training or experience, numerous studies have demonstrated than nearly all police officers perform at nearly the same levels as untrained civilians as they both tend to hover only slightly above that of a pure chance of 50/50. Though these studies produce somewhat varying rates, it is important to not that there is little consistent validity that certain populations are demonstrably better at dete cting deception than untrained or chance selections (Vrij 2004, p. 159; Vrij, et al. 2004, p. 283; Kassin Gudjonsson 2004, p. 37; Mann, et al. 2004, p. 137). In gathering information, the label of â€Å"interrogation† is attached to processes if the person being questioned is viewed as a primary suspect while the more benign term of â€Å"interview† attaches to those viewed as simply a witness, potential witness or other information gathering purpose. In light of this, one might rightly assume that the chief difference in this labeling of process is the presumptions of the interviewer or interrogator. In the process of interrogation, there is generally an assumption of guilt or at least culpable knowledge for which it is quite possible for induced interviewer bias to play a significant role in the outcome (Wright Allison 2004, p. 138; Gudjonsson 1992, p. 14). This bias is evident through the reply of one police officer in regards to this issue that, â€Å"†¦ we don’t interrogate innocent people† (Kassin Gudjonsson 2004, p. 36). Though it could be called an off-the-cuff remark, this is fairly typical of t he extent of bias that would likely result in a false-positive type error stemming from the subsequent behaviors such as attempts at â€Å"forcing† the subject to â€Å"talk† by not necessarily physical means (Memom, et al. 2003, pp. 57-58). Why People Lie To answer such a question, we might just as well ask, â€Å"Why do people tell the truth†? While these are simply two sides of the same coin, the question brings us no closer to the answer except that there are a potential myriad reasons yet by viewing it in this manner, some insight is possible. For example, in teaching values to groups to young people, one method to force the consideration of ethics is to ask the question, â€Å"Why one should not steal?† This purposefully leading question generally gets responses that either indicates an element of fundamental morality such as, â€Å"Because it is wrong†¦Ã¢â‚¬  or, alternatively, some variant of a fear of getting caught and the ensuing punishment. Similar to this, in consideration of the question of â€Å"why people lie†, the same tenets likely apply, that is they do so to escape punishment or other consequences or perhaps they do so based on the idea similar to the proposition of â€Å"the lesser of t wo evils† as might be the case when one tells an altruistic lie to protect another or to save a relationship (Memom, et al. 2003, pp. 10-11). In studies on lying, aside from the fact that it occurs more than one might think, there seem to be, in the minds of those who tell a lie, different types or degrees of lying depending on the stakes, the outcome and the person(s) deceived (Memom, et al. 2003, pp. 10-11). For example, if a â€Å"good thing† such as a job comes from a lie, it is more acceptable than a theft that occurs by deception. While this is likely how many people think, it is nonetheless a very slippery slope and the â€Å"good† done to one and the â€Å"harm† to another is quite debatable, depending on if one is the victim or the perpetrator. On method of gaining insight into the decision to tell a lie that assumes rationality, that is a conscious decision that a lie is in their calculated best interest, is to utilize the combined approach of motivation theory with the same type of payout ratio analysis used in decision risk modeling. With regards to motivation, one applicable model is that of Vroom’s Expectancy Theory in which the willingness of a person to perform some action is mediated by the interaction three variables (Dreher Dougherty 2002, pp. 34 – 36): Valence – The degree to which the outcome is desired. Instrumentality – The extent to which successful performance would result in the desired outcome. Expectancy – The likelihood of being able to perform a given task. In evaluating business decisions, companies will often construct a formal payout analysis in which the likelihood of positive outcome is weighed against the payout of success and the payout of failure. For example, the company that has a 50% chance of striking gold in a certain mine whose value is $10M but costs $1M to discover, regardless of success should rationally pursue this option which has a projected payoff of $4M (.5 x $10M less $1M expense). While this process of decision-making is easily illustrated utilizing financial examples, the fact that a decision has value to an individual is appropriate. Thus, when a person chooses to lie, they have consciously or not, evaluated their options and, from their perspective made a choice that lie outweighs the payoff of truth against the two possible â€Å"costs† of lying, that of the lie not being believed and that of being caught not telling the truth (Gonjonsson 1992, p. 21). Thus, by seeking to understand â€Å"why† a nd â€Å"how†, one can effectively understand â€Å"who† which aids the investigator to get inside the head of the person being questioned (Douglas Olshaker 1999, p. 17). The Problems of Confessions As indicated previously, the situational context of the interrogation process combined with the fact that police officers most likely have some degree of training in conjunction with the experience of dealing with deception extensively in their daily work yield the predictable result of â€Å"disbelieving people who are innocent with a great deal of confidence† (Kassin Gudjonsson 2004, p. 33). The well-documented presence of interviewer bias creates this situation in which only statements that support the interviewers already held beliefs (Wright Allison 2004, p. 139). This process, in an estimated 30% of the roughly 60% of cases that in which someone confesses, leads to an eventual confession of â€Å"something† culpable (Loftus 2004, p. I; Gudjonsson 1992, p. 50; Pearse, et al. 1998, pp. 1 – 2). Like the variance in the studies citing the ability to detect a lie, there are variance indications of the extent to which false confessions are given with the true n umber difficult to measure (Memom, et al. 2003, p. 76). Despite the problems in getting a true assessment of the problem, there is agreement that certain types of people are much more likely to confess than other groups. For example, youth or those who suffer from some mental disorder or diminished capacity are â€Å"prone†¦ to provide information which is unrelable, misleading or self-incriminating† (Pearse, et al. 1998, p. 2). In data collected on real-life police interviews with the accompanying real-life consequences, research revealed four generally applicable predictors of the likelihood of a confession (Pearse, et al. 1998, pp. 9 – 13): Age – 60% of confessors in this inquiry were under 25 while 60% of deniers were over 25. Drug Use within the last 24 hours was just over 3x as likely to confess. The presence of counsel reduced the rate of confessions by  ¼ the rate as when no counsel was present. Prison or previous documented criminal experience decreased the odds of a confession by  ½ as naà ¯ve subjects. With this information, it is possible to implement practices and procedures by which the pursuit of truth by managing situations in which false confessions due the subjects succumbing to perceived pressure to come up with something that will be â€Å"rewarded† is possible. These practices should likely include (Memom, et al. 2003, pp. 82 85): Using more information gathering-type approaches rather than â€Å"tricky techniques† designed to elicit a confession. Record all interviews and interrogations. Include legal counsel that do more than simply point out administrative issues but act in the interest of the client. Identify and require an â€Å"audit† of particularly at-risk persons. Require additional evidence to corroborate a confession. Discernment Techniques: Raising the Odds of Detection Perhaps most striking about the detection of deception is that there is no standard â€Å"Pinnochio’s nose† or nonverbal behavior that exists to signal an intent to deceive (Vrij 2004, p. 160; Memom, et al. 2003, pp. 11 – 12). This fallacy is one in which people superimpose how they might feel with how they think another should feel and, with this in mind, other indicators of deception will be examined Most people are somewhat familiar with the typical lie detector which utilizes subtle changes in autonomic measures such as galvanic skin responses, heart rate, blood pressure and respiration as correlates of an emotional response to a specific stimulus indicated the subject is concealing knowledge. Under controlled conditions, with a trained operator and a voluntary subject, accuracy rates as high as 95% have been claimed, this apparatus in no longer acceptable in court a a sole source for conviction (Gilbert 2004, pp. 138 – 140; Memom, et al. 2003, pp. 21 – 25; Bennett Hess 2001, pp. 160 – 161). The use of polygraphs as well as electroencephalograms (EEG) to record the autonomic responses to questioning have made to the detection of deception, specifically the attempt to hide specific knowledge, much more difficult. As the brain is very much an organ characterized by the transmission of electrical impulses, its activity is correlated to the conscious and unconscious information it processes. One very specific component of the brainwave, upon stimulation by a question or picture, evokes an excitation in brain wave patterns to the degree that a novel meaningful stimulus can be discerned by the researcher, regardless of what the subject claims. This component, dubbed the â€Å"P300† as it is positive in direction and it occurs 300 milliseconds after stimulation, can be defeated through specific means but for the usual criminal type that does not read journals of physiopsychology, it is a very reliable detector of cognitive effort to deceive (Rosenfeld, et al. 2004, pp. 2 05 – 206). This insight is somewhat complimentary to a less equipment-intensive method in which the interviewer pays close attention to the level of cognitive effort the subject is using. This is based on the reasonable assumption that a liar, in keeping their story straight, must work harder to construct a believable falsehood (Kassin Gudjonsson 2004, p. 39; Bennett Hess 2001, p. 160). In a truthful recollection, it is possible that details may be remembered at one point and omitted in another but the story retains the same essence. This is especially observable when the subject is questioned in a way that takes the elements out of sequential order; the difficulty in getting the details consistent takes considerable effort and is not always successful. This method of deception detection is dubbed â€Å"implicit† as one is considering the element of cognitive effort required to â€Å"keep the story straight† rather than simply if they are lying or not in order to determine the v eracity of the statement(s) made (Vrij 2004, p. 172). Complimentary to this and working in the investigator’s favor is that the subject in most likely not aware of what the police know and is thus at a significant disadvantage with regards to knowing how much information to disclose and how much to withhold (Vrij 2004, p. 170). Similarly, the focal point of the investigation should be upon what the subjects says and, to the degree possible, what the subject does not say through apparent efforts to conceal knowledge. In conclusion, as a result of both seeking to understand the â€Å"how† and â€Å"why†, a law enforcement official can better determine the ultimate culpability for a crime. In consideration of this information the following are presented as suggested methods for increased discernment of deception: Keep an open mind – As indicated, the common view that subjects are lying only â€Å"when their lips are moving† is strong evidence of interrogator bias and is likely to find exactly what the interrogator is looking for†¦ regardless of the truth. You are not interrogating Pinocchio – A belief that liars fidget may or may not hold. The subject may be nervous as this could be their first questioning. They may have been drinking†¦ ad infinitem. Do not interrupt, do not release information unless necessary – The fact that they do not know what you know is a very good thing. This information asymmetry works to both gather more information and better evaluate it. Do not look at the person’s face Facial clues are unreliable, person to person, and a layer of misleading data upon the real focus, the content of the interview. Though nonverbal clues may be present, research indicates that content issues such as omissions or inconsistencies are most likely where clues reside. Consider the amount of effort the subject is using – By using the implicit method of deception detection, more reliable, valid assessments are possible than simply trying to determine if the subject is lying. Record the interview – This is recommended not just for later review and protection of all involved but such as step allows the interview to focus on the content. Works Consulted Bennett, W.W., and Hess, K.M. (2001). Criminal Investigation, 6th edition. Stamford, Connecticut: Wadsworth/Thomson Learning. Douglas, J. and Olshaker, M. (1999). The Anatomy of Motive. New York, New York: Pocket Books. Dreher, G.F., and Dougherty, T.W. (2002). Human Resource Strategy: A Behavioral Perspective for the General Manager. Boston, Massachusetts: McGraw–Hill Irwin. Gilbert, J.N. (2004). Criminal Investigation, 6th edition. Upper Saddle River, New Jersey: Pearson Prentice-Hall. Gudjonsson, G. (1992). The Psychology of Interrogations, Confessions and Testimony. Chichester, UK: Wiley Sons. Kassin, S.M. and Gudjonsson, G.H. (2004). â€Å"The Psychology of Confessions: A Review of the Literature and Issues†. Psychological Science in the Public Interest (5)2, pp. 33 – 67. Loftus, E. (2004). â€Å"The Devil in Confessions†. Psychological Science in the Public Interest (5)2, pp. i – ii. Memon, A. Vrij, A. Bull, R. (2003). Psychology and Law, 2nd Edition. Chichester, UK: Wiley Sons. Pearse, J., Gudjonsson, G.H., Clare, I.C.H., and Rutter, S. (1998). â€Å"Police Interviewing and Psychological Vulnerabilities: Predicting the Likelihood of a Confession†. Journal of Community Applied Psycholog, 8, pp. 1 – 21. Rosenfeld, J.P., Soskins, M., Bosh, G., and Ryan, A. (2004). â€Å"Simple, effective countermeasures to P300-based tests of detection of concealed information†. Psychopysiology, 41, pp. 205 – 219. Vrij, A., Evans, H., Akehurst, L., and Mann, S. ( 2004). â€Å"Rapid Judgements in Assessing Verbal and Nonverbal Cues: Their Potential for Deception Researchers and Lie Detection†. Applied Cognitive Psychology, 18, pp. 283 – 296. Vrij, A. (2004). â€Å"Why Professionals Fail to Catch Liars and How they Can Improve†. Legal and Criminal Psychology, 9, pp. 159 – 181.

Globalization and Dubai’s Tourism Industry Essays -- Dubai’s Tourism In

Dubai is one of the seven Emirates that make up the United Arab Emirates. Dubai is located in a south of the Persian Gulf on the Arabian Peninsula with the largest population of 2.2 million, 15% being Emiratis and 65% south Asians. Over the decades, Dubai has shown unbelievable growth, from a small fishing town to one of the most iconic cities in the world. The growth has been based on the oil discoveries and revenue it created. (Mazza, n.d.)In the past half century, Dubai’s economy was based on fishing, pearl diving, date farming, camel rearing and sea trade. By the turn of the 20th century, Dubai was a well-off port to attract settlers from Iran and India. This resulted to a large Indian population that settled in Dubai and was particularly active in the shops. This cosmopolitan atmosphere and air of tolerance began to attract other foreigners. This paper aims to investigate ways which Dubai have used to attract globalization and develop their tourism industry. Dubai put tourism at the core of its economic development plans in order to diversify and strengthen its economy, while decreasing its dependency on fluctuating oil prices (Sharpley 2008). The plans have been successful; in 2007, non-oil revenues contributed to 63% of GDP, with Dubai contributing 29%, to the UAE’s total GDP. What is more surprising is that due to Dubai’s push to use tourism to diversify its economy, Dubai contributes over 80% of the non-oil related GDP in the UAE. Dubai is now considered one of the top tourist destinations in the world. In 2011, Dubai’s top tourist source markets outside the UAE were Saudi Arabia, India, UK, Iran, and the US. Tourism in Dubai Tourism in Dubai is an important part of the Dubai government's strategy to uphold the movem... ...trips and tourism packages, all contribute to the continuous growth of tourism industry. Tourism has also had both positive and negative impacts on Dubai. It has boosted Dubai’s economy but has brought negative impacts. The negatives are mainly cultural dilution and poor working conditions for the informal sector workers. Works Cited Brook, D. (2013). How Dubai Became Dubai. A History of Future Cities. Marketing, D. D. (2012). Dubai for Tourism . Dubai, Dubai, United Arab Emirates (UAE). Mazza, G. C. (n.d.). Development of Tourism in Dubai. Retrieved 02 25, 2014, from Gastronomy and Global cities: http://laudergastronomy.com/wp-content/uploads/2013/05/Development-of-Tourism-in-Dubai_Grace-Chang-Mazza.pdf Sharpey, R. (2008). Tourism and hospitality Planning and Development. In R. Sharpley, & R. Sharpley, Planning for tourism: the case of Dubai (pp. 13-30).

Kants Ethics vs Utilitarianism Essay

The two ‘core’ ethical theories covered in class that I started to assess are the categorical imperative and utilitarianism, both of which offer an approach to decision making in the context of social and interpersonal relationships. In this with in depth understanding of both that Kantian ethics is much easily appreciated than the ethics of utilitarianism as Kantian ethics apply to everyone yet both ethical approaches lead to faults. Utilitarianism is the moral theory that brings upon the greatest happiness. This theory illustrates that right actions as said to be right as they endorse happiness to someone or a group of people whereas wrong as they uphold unhappiness. Kantian ethics on the other hand puts a persons benefit before the greater good, that is people never should be used as means only but means to an end. Both Kant’s ethics and Utilitarianism greatly analogize between each other as Kant is deontological which means that someone ought to do things because they are right, as it is duty and that in itself makes it right. On the other hand Utilitarianism is based on consequence as someone should act to bring the greatest good to the greatest number of people. Utilitarianism does not care if the greatest good/benefit is brought with someone’s manipulation, lies or coercion. Kant’s ethical would disagree with this completely as If someone lies then it becomes universal law that everyone would have the right to do the same thing. Ethical implication arise from Kant’s ethics even if this in my opinion is a more logical means that a person should consider in ethical decision making. Suppose for example you would lose your friends for telling the truth in a given situation, Kant’s ethics says you shouldn’t lie what so ever because it is you duty not to do so would bring unhappiness and here utilitarianism would differ completely. Another situation where Kant’s ethics would coincide with itself is for example if a woman was trying to hide from a guy that was trying to kill her and you decided to help that woman by letting her stay in your house, few hours later the guy trying to kill that woman come knocking on your door asking about her whereabouts. Here with Kant’s ethics you can’t lie as it is your duty not to and it is also your duty to protect that woman you made a promise to earlier, in this situation one action must be chosen and this shows a major fault in Kant’s ethics. Utilitarianism has its benefits but requires much more effort to do than Kant’s ethics. There are two classical types of utilitarianism, which are act and rule utilitarianism. Act utilitarianism is right only if the result of good is just as much or more than any other available substitute. Rule utilitarianism states that an act is right if the rule itself acceptance would lead to a greater utility for society that any other substitute then that act is right. The strength of utilitarianism comes in the fact of it offering a system that is absolute, giving us a potential solution to every situation faced. The second strength is that is seems to grasp the sense of morality even though the actions are come with deceitful like lying means it is for the greater good, uplifting the suffering in this world. Utilitarianism has its objections and can be problematic as different people have different thought on what happiness is and what pleasure is. One of the problems that arise from Utilitarianism is the no rest objection, for example if I wanted to sleep or go to the movies at those moments I could be trying to help poor people or saving the environment to promote more utility. Having my salary should mostly go into helping others as this brings upon the greatest good but as you see this theory does not make sense to why I shouldn’t make myself happy. Trying to help all the time with no rest becomes too demanding and this theory fails understand different obligations making utilitarianism a false doctrine to many.

Photosynthesis Formal Lab Report Essays

Photosynthesis Formal Lab Report Essays Photosynthesis Formal Lab Report Paper Photosynthesis Formal Lab Report Paper This captured energy is used to convert carbon dioxide into complex energy-rich molecules that can be used by themselves or other organisms. Photosynthesis is the conversion of light energy to chemical energy in the form of sugar and other organic molecules. (Russell, Wolfe, Hertz, Starr, 2010). Photosynthesis can be categorized into two main processes: light-dependent reactions and light-independent reactions. For the purpose of this lab, light- dependent reactions will be investigated. The reactants involved in photosynthesis include carbon dioxide, water and sunlight to produce glucose, oxygen, and water. The light reactions involve the capture and use of light energy by pigment molecules to synthesize NADIA and AT P. Plants use this light energy to produce glucose from carbon dioxide. The glucose is stored mainly in the form of starch granules, in the chloroplasts of cells. Glucose in the form of starch is non-polar and is not soluble in water, allowing it to be stored much more compactly. The chloroplast is formed from an outer membrane, an inner membrane, and an intermediate compartment. The aqueous environment within the inner membrane is called the stoma. Within the stoma is the ayatollahs, which are flattened, closed sacs. It is in these sacs that the specific molecules required to carry out the light reactions of photosynthesis are contained, including the pigments, electron transfer carriers, and the TAP syntheses enzymes for TAP production. A pigment is able to absorb photons of light and differ by the wavelengths of light they can absorb. The amount of energy in a photon is inversely related to its wavelength. Blue light has a shorter wavelength and consists of photons that have higher energy than the longer wavelength red light. When photons of light hit an object, they can be reflected off the object, transmitted through the object or absorbed by the object. The absorption of light by a pigment results in electrons becoming excited and moving to a higher energy state. Color is determined by the wavelengths that it cannot absorb, therefore chlorophyll is green since it does not absorb green light. If a pigment absorbs all wavelengths of visible light, the object appears black. A large variety of pigments can be found in plants. The most common are chlorophyll a and b and carotids, located in he chloroplasts of cells, and anticyclones, located in the cell vacuoles and do not contribute to photosynthesis. Each of these pigments has different properties and performs different functions for the plant, including absorbing light in different parts of the spectrum. The more light absorbed equals the more energy available for a plant. The pigment molecules that can be found in plants are specifically arranged in and around photometers that are embedded in the ethylated membranes of chloroplasts. Each contains a reaction centre surrounded by an antenna complex. Light from the sun travels into the holocaust and goes through the antenna pigment. The energy trapped by the antenna complex is funneled to the reaction centre, called IPPP, where it is used to oxidize a chlorophyll molecule and donate an electron to a primary acceptor molecule to continue into carbon fixation to ultimately release glucose sugar (Oracle Thinkers, 2010). The reaction centers are named after the wavelength (in manometers) of their red-peak absorption maximum. Most plant parts, especially leaves, contain some combination of the three main pigments, even if only one is especially obvious. It is possible to separate these segments from each other using a technique called paper chromatography. In this process, plant tissue extract is applied to a piece of chromatography paper. A solvent is allowed to travel up the paper, and if the pigment is soluble in the solvent, it will be carried along with it. (Benny, 2009) Different pigments have different affinities for the solvents or polarity and will travel at different rates. Chlorophyll, anticyclones, and carotids are typically non-polar. For lab 12, it is hypothesized that chlorophyll a and b are present in a plant leaf and contribute to the starch production in photosynthesis. Also, products of photosynthesis will be present in leaf tissue exposed to red and blue light wavelengths for sever al days, but a decreased presence in leaf tissue exposed to green and black light wavelengths. In lab 13, it is expected that since chlorophyll a and b are more polar and smaller molecules than the anticyclones and carotids, they will travel higher up the chromatography paper than the other pigments. Materials and Methods Lab 12 In the first part of this laboratory experiment, a multi-colored leaf was removed from a Coleus plant that was in direct sunlight for several hours. The hypothesized results for which pigments were present and the results of an kill starch test were then recorded. A boiling alcohol bath was set up, which consisted of a IL beaker containing mall of water on a hot plate, and a mall beaker containing mall of 80% ethyl alcohol inserted into the larger water beaker. The water was brought to a slow boil and the leaf was placed into the boiling alcohol solution in order to extract the pigments. When the leaf became almost white, the leaf was removed, placed into a Petri dish, and covered with distilled water. KAKI solution was added to the distilled water until a pale amber lour was obtained. The leaf produced a purple-black color in some areas which show a positive test for starch. In the second part of the lab, part of a leaf was taken from a germanium plant that had been covered for several days with different color filters: blue, green, red, and black. In order to differentiate between the leaves taken from different filters, the black filter leaf had one notch taken from leaf, the green had 2 notches, the red had 3 notches, and the blue had 4 notches. The leaves were then place into the alcohol bath that was used in the first experiment. When the leaves became mostly white, they were removed using forceps, placed into a Petri dish, and rinsed and covered with distilled water. Kill was added to the distilled water until an amber color was achieved. The observation of the reaction of the leaves with the kill after 5 minutes was then recorded. See appendix for original lab report. Lab 13 In this laboratory experiment, pieces of spinach leaves were mashed in a mortar and pestle in order to extract the plants pigments. These pigments were transferred to a piece of chromatography paper with a marked pencil line CM room the bottom by means of a capillary tube. The chlorophyll pigment was allowed to dry and was re-applied 5 times, drying between each application. The chromatography paper rolled and stapled and was placed into a jar containing a petroleum ether and acetone solvent. The chromatography was allowed to proceed until the solvent reached about CM from the top. The paper was removed and examined for separations of pigments. See appendix for original lab report. The control for the overall experiment was the original leaf taken from the Coleus plant in lab 12, both before and after the 121

Ivan the Terrible essays

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Work, Labor, and Play Essay Example | Topics and Well Written Essays - 1250 words

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The effects of child abandonment Essay Example | Topics and Well Written Essays - 1750 words

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