How far did the 'Bush Doctrine' constitute a radical shift in US Essay

How far did the 'Bush Doctrine' constitute a radical shift in US foreign policy - Essay Example A historical study is being attempted in this essay to bring out all the elements connected with American foreign policy and its relationship to other countries. Further, various elements of the foreign policy is analyzed here. It is seen that after the Second World War, the Cold War between USA and USSR contributed much to the formation of foreign policies in America. The two pillars of American policy at that time were deterrence and containment. After the fall of USSR in 1991, America became supreme power in the world. As a powerful nation it had to take clear cut foreign policies and the implementation of national security against the uprisings of different segments. But things changed soon. After 2000 America witnessed many damages on its national security. The attack on the Twin Towers and Pentagon on September 11, 2001 made America to think more about changing its foreign policy. The president of the time, George W. Bush expressed the need for the change of policy through his set of guidelines, commonly known as ‘Bush’s doctrine. His doctrine changed the foreign policy of America from deterrence and containment to pre-emptive action against the terrorists. The present essay tries to find out how the Bush’s doctrine acted as a great shift in the foreign policy of America. ... ‘America now commanded a degree of power greater than anything recorded in all of human history. No one doubted this; nor did anyone imagine that any other country or group of countries currently existed with the capacity, or the will, to challenge American power.’1 President Bush: His life, visions and Interests George W. Bush is the only President with an MBA in the history of America. He was born on July 6, 1946, in a political as well as business family in New Haven, Connecticut. Heron Marquez in the biography of George W. Bush says, that ‘His grandfather was Prescott Bush, a United states Senator from Connecticut. Other relatives were bankers and Wall Street stockbrokers.’2 His father was George Herbert Walker Bush, America’s 41st President. The background of politics has made him successful at politics along with business. In 1994 he made his entry into politics becoming the governor of Texas. The election for the president in 2000 made many str uggles for him. He was not supposed to be the president by the popular vote, but with the help of court he successfully became the 43rd president of America. In the election campaign Bush stressed the America’s foreign policy on maintaining peace. ‘He summarized his plans by saying, â€Å"I will renew the bond of trust between the American president and the American military. I will defend the American people against missiles and terror. I will begin creating the military of the next country.†3 The speeches of Bush during the campaign were mainly on the matters of American economy, education, and personal aspects. Even though much was not mentioned regarding the foreign policy he had clearly

Childcare studies (Working with Children) Assignment

Childcare studies (Working with Children) - Assignment Example The international desire to improve the quality of childcare and pre-school provisions has contributed a great deal in ensuring that children receive high quality education and childcare as they start their journey of life in educational set-ups (Shaw & Brewer 2012, pg 60). This paper will delve into details of the several provisions needed for childcare, the various types of environments and establishments relating to child development, the skills required as well as the training needed for the numerous childcare roles and working environments. There are various types of childcare and educational provisions. These provisions fall under both formal and informal sectors. These provisions include nursery education, playgroups, child-minders, crà ¨ches, pre-school, care homes, just to mention but a few. Nursery education is aimed at giving additional physical, social, emotional and cognitive support to children when they are outside the home. Nurseries are normally attended by children aged between two and five. These facilities are normally offered free of charge by Local Education Authorities (Dates 2004, pg. 54). However, if offered by private institutions or organizations then are subject to fees. Nursery schools are normally staffed by teachers who are trained. They are normally assisted by nursery nurses as well as other support staff comprising of volunteers, nursery and teaching assistants (Dallimore 2004, pg. 98). Pre-school is another provision offered to children. These facilities are usually attached to primary schools and are meant for children of ages four. Pre-schools are normally staffed by highly trained teachers and support staff. They are charged with the responsibility of preparing children for school (Laming 2003, pg. 43). It is important for children to attend pre-school before joining primary school since it gives them an insight of what to

Physiology Of Sleep

Physiology Of Sleep Physiology Of Sleep Introduction Sleep is a state of reversible unconsciousness in which the brain is low responsive to external stimuli. We are functionally blind during sleep with no response to visual stimuli and a decreased threshold of response to auditory stimuli. Babies have been exposed to sound of up to 100 dB, which is above the legal limit for ear protection for employees, without waking up. In adults, the action is selective demonstrating continuing cortical function. For example, a sleeping mother is woken by her crying baby but not by other louder noises. Definition of sleep and sleeping Phases with specific EEG patterns and physiological changes. Natural sleep is separated into two distinctive states: non rapid eye movement (N.R.E.M) and rapid eye movement (REM) sleep. NREM sleep is then further seperated into 4 stages where stage 1 is the lightest and stage 4 the deepest level of sleep. REM sleep is divided into phasic and tonic phases. The two distinctive states follow a regular pattern called a sleep cycle which, in an adult, lasts about 1 and half hours and comprises a period of N.R.E.M sleep followed by REM sleep. The cycles may be separated by a period of wakefulness and are repeated 3–6 times each night and are typically displayed as an hypnogram (Fig. 1). The majority of deep (stage 4) NREM sleep occurs in the first and second cycles. As the night progresses, the proportion of REM sleep in a cycle increases and the NREM element is of lighter stage 2 sleep. Age has a major effect on the duration of sleep and the ratio of NREM/REM sleep. Neonates sleep 16–18 h. It is widely distributed throughout the day with REM sleep accounting for 50% of total sleep time (TST). This may be even greater in premature babies. By the age of 24 months, children should sleep 10 h per day, mainly at night with one or two naps during the daytime and REM sleep has declined to 20–25% of TST. Adults normally sleep 6–8 h per day with 15–20% REM sleep. With increasing age, TST changes little although sleep is more fragmented with more frequent and longer awakenings (decreased sleep efficiency) with less REM sleep and more light NREM sleep. Night-time sleep may be decreased if naps are taken during the day. Functions of sleep The functions of sleep are still poorly understood. However, the observation that sleep (or, at  least, an activity–inactivity cycle) is present in all species and has been preserved throughout evolution and that sleep deprivation leads to a drastic deterioration in cognitive  function and eventually to mental and physical morbidity proves its importance. It has been suggested that sleep might conserve energy by reducing core temperature slightly and lowering metabolic rate by 10% compared with quiet wakefulness. Sleep would prevent perpetual activity as a response to environmental stimuli leading to excessive energy consumption. However, sleep is a state of starvation and there is no evidence that sleep is important for tissue repair. Sleep has been implicated as an important factor in storage of long-term memory. Facts learned during the day are usually better remembered the next morning whereas facts learned shortly before going to sleep are often poorly recalled. Electrophysiological features of sleep The stages of sleep are characterised by typical patterns of electroencephalogram (EEG), electro-myogram (EMG) and electro oculogram (EOG) activity Wakefulness with open eyes is characterised by an EEG with dominant low amplitude, high frequency beta activity of  16–25 Hz. Muscle tone is normally high with high to moderate EMG activity. Stage 1 Sleep is usually initiated by a transition from wakefulness to a state of drowsiness with closed eyes and a shift from EEG beta activity to alpha activity of 8–12 Hz passing to Stage 1  NREM sleep with a mixed frequency EEG-pattern with low amplitude theta waves of 3–7 Hz accompanied by slow rolling eye movements. Involuntary muscle clonus occurs frequently,  resulting in jerky movement of the whole body (hypnic jerks) and EMG activity is moderate-to-low. This stage lasts typically only 5–10 min, during which time minor auditory stimuli will cause arousal. Stage 2 Stage 2 is characterised by short bursts of high frequency activity (12–15 Hz – sleep spindles) and K-complexes (large amplitude biphasic waves). Bodily movements continue and  the EMG activity is low-to-moderate. This stage is generally short (10–20 min) in the first 1–2 cycles but predominates in later cycles. It is the most abundant sleep stage in adults  accounting for up to 50% of TST. Stages 3 and 4 Deep NREM sleep stages 3 and 4, sometimes combined as slow wave sleep (SWS) are characterized by high amplitude low frequency delta waves (> 75 µV and 0.5–2 Hz) with stage  3 having between 20–50% and stage 4 more than 50% delta activity. EMG activity is low and eye movements are rare. Arousal through auditory stimuli from this stage of sleep is  difficult and, if awakened, the individual is often disorientated and slow to react. Return to sleep is easy and short arousals (< 30 sec) are rarely remembered. REM sleep NREM sleep is followed by REM sleep, the proportion increasing with each cycle. REM sleep is characterised by a fast mixed frequency low voltage EEG with saw-tooth waves and  rapid eye movements on the EOG. During the tonic phases of REM sleep, there is marked reduction of muscle tone and EMGactivity in skeletal muscles. The tonic phases of REM sleep are interrupted by short episodes of phasic REM sleep with increased EMG activity and limb twitches. The atonia of REM sleep affects all skeletal muscles, except the diaphragm and the upper airway muscles, and is associated with hyperpolarisation of the ÃŽ ±-motor neurones. The purpose of this may be to prevent the acting out of dreams. About 10% of the population have experienced sleep paralysis (i.e. wakening from sleep and finding that the atonia has  persisted into wakefulness). It can be frightening but is entirely harmless. Natural wakening usually occurs from REM sleep. Subjects woken from REM sleep are much more likely to rec all dream content than those awakened from NREM sleep. NREM dreams are generally vague and formless in contrast to REM dreams. Physiological changes during sleep Respiratory system During NREM sleep, there is a decrease in respiratory drive and a reduction in the muscle tone of the upper airway leading to a 25% decrease in minute volume and alveolar ventilation and a doubling of airway resistance accompanied by a small (0.5 kPa) increase in  PaCO2 and decrease in PaO2. Hypercarbic and hypoxic ventilator drives are reduced compared with wakefulness. The breathing pattern is regular except at the transition from wakefulness into sleep when brief central apnoeas are common. During REM sleep there is a further decrease in hypercarbic and, particularly, hypoxic ventilatory drives. The breathing pattern is irregular especially during phasic REM sleep. The loss of skeletal muscle tone in REM sleep affects the intercostal and other muscles which stabilise the chest wall during inspiration. In infants, this may be seen as paradoxical movement of the rib cage and abdomen. In adults, there may be maldistribution of ventilation and impaired ventilation–perfusion matching with consequent arterial hypoxaemia. In normal subjects, this is unimportant but it may be very important in patients with chronic lung disease or abnormalities of the thoracic (e.g. kyphoscoliosis). The great majority of patients with impaired respiratory function will be at their worst during REM sleep. Cardiovascular system Blood pressure decreases during NREM and tonic REM sleep but may increase above waking values during phasic REM sleep. Cardiac output is generally decreased during all sleep  phases. Systemic vascular resistance (SVR) and the heart rate are both reduced during NREM and tonic REM sleep and increased during phasic REM sleep. Central nervous system Cerebral blood flow (CBF) increases by 50–100% above the level of resting wakefulness during tonic REM sleep and is even greater during phasic REM sleep. Cerebral metabolic rate, oxygen consumption and neuronal discharge rate are reduced during NREM sleep but increased above resting values during REM sleep. The autonomic nervous system shows a general decrease in sympathetic tone and an increase in parasympathetic tone,  except in phasic REM sleep. Renal system The glomerular filtration speed and filtration fraction are reduced and ADH secretion is increased resulting in a less volume concentrated urine. Endocrine system The secretion of several hormones is directly linked to the sleep/wake cycle. Melatonin is released from the pineal gland under the control of the supra-chiasmatic nuclei (SCN) in a 4–5h pulse, usually beginning at the onset of darkness (~9 pm). The pulse is inhibited or delayed by exposure to bright light in the evening. It is best regarded as being permissive of sleep (‘opening the gate to sleep’) rather than as an hypnotic, as it is possible to maintain wakefulness during this period. Growth hormone is mostly secreted during the first episode of SWS, particularly  during puberty. Prolactin concentrations also increase shortly after sleep onset and decrease with wakefulness. Sleep phase delay delays secretion of both of these hormones. The secretion of cortisol decreases with the onset of sleep and reaches a trough in the early hours of the morning and a peak just after waking. Temperature control In contrast to anaesthesia, thermoregulation is maintained during sleep. However, the shivering threshold is decreased and body core temperature decreases by about 0.5 °C in humans and 2 °C  in hibernating mammals. Body temperature is linked to the circadian rhythm and reaches its nadir at about 3 am. Thermoregulation is quite good in human infants compared with  other species. Control of sleep Sleep follows a circadian (~1 day) cycle, the periodicity of which is regulated by an independent genetically determined ‘intrinsic clock’ which is entrained to a 24 h cycle by external cues (Zeitgebers) such as light, darkness, clock time, working patterns and meal times. When a human being is deprived of all external time clues and is exposed to constant levels of illumination (‘free running’), the wake/sleep cycle typically lengthens to about 24.5 h. Subjects who are born blind without any appreciation of light generally free run while those blinded in later lifeor who retain some perception of light remain entrained. All living organisms, including plants and fungi, have been found to have clock genes and to show an inactivity/activity cycle. In mammals, control of the intrinsic clock is located in the SCN on either side of the third ventricle, just above the optical chiasm. In animal experiments, its destruction leads to a change from the normal sleep cycle into several shorter sleep/activity periods during the day. As noted above, melatonin secretion is  prompted by the SCN just before the usual time of sleep onset. A mismatch of this pattern with sleeping time, as occurs in shift workers and after trans-meridian flights, leads to sleep disturbance (‘jet lag’) as the subject is trying to sleep during their circadian day. Light therapy can be helpful in re-setting the circadian clock and the interested reader is referred to the bibliography. The propensity to fall asleep varies throughout the day and depends upon both circadian factors (process C) and time since the last sleep period (process S). The longer the time since the  last sleep period, the greater will be process S. However, its propensity will be modulated by process C. The circadian pressure to sleep is greatest at ~2 am with a secondary peak at ~2 pm. It is least at ~6 am and ~6 pm. If a subject elects to stay awake throughout the night, they will feel most sleepy in the small hours of the morning but will get a ‘second wind’ as morning approaches and the circadian pressure to sleep declines. If wakefulness is maintained, a second period of sleepiness and relative alertness will follow in early afternoon and early evening, respectively. Some of the 8-h sleep debt will be recovered that night but process C will ensure that awakening will occur at or shortly after the normal waking time. Sleep is normally an actively initiated and not a passive process. Unless a subject is sleep deprived, successful initiation of sleep depends both upon the phase of the circadian clock and  external factors (recumbent position, darkness, reducing sensory input). Over the years, considerable effort has been focused on a search for: (i) a ‘sleep centre’, a nucleus or region in the brain where stimulation or ablation would lead to sleep; and (ii) a hormone or transmitter which would reliably induce sleep. Neither have been found because the mechanisms resulting in sleep are complex and diffuse. During wakefulness, the CNS is dominated by activity of the ascending reticular activating system (RAS) in the brain stem. This formation receives sensory input from all peripheral sensors and projects to the thalamus and the cortex. Its main neurotransmitters are acetylcholine, noradrenaline, dopamine and histamine which explains the sedative effect of antagonists to these  substances. A decrease in its activity permits sleep to be initiated by suppressing incoming external stimuli. The induction of SWS is associated with the secretion of ÃŽ ³-aminobutyric acid (GABA) from basal forebrain neurones. Therefore, it is not surprising that benzodiazepines and barbiturates, which act through stimulation of GABA receptors in the CNS, induce sleep or anaesthesia. Cholinergic mechanisms initiate REM sleep through stimulation of pontine neurones in the  lateral portion of the pontine tegmentum and the nucleus reticularis pontis oralis. In animal experiments, injection of carbachol (acetylcholine agonist) induces instantaneous REM sleep. Recently, orexins (hypocretin) have been isolated in the hypothalamus and appear to be important in the control of REM sleep and appetite. CSF concentrations of orexins have been found to be very low in patients with narcolepsy. Influence of surgery and anaesthesia on sleep Anaesthesia and surgery can have a profound effect upon sleep. On the first night after surgery, sleep architecture is severely disrupted with little or no SWS and REM sleep. The  light Stage 2 sleep is fragmented with frequent awakenings. The degree of disruption appears to be related to the severity of the surgical insult. The mechanism is unclear but it is probably due to a combination of the surgical stress and the effects of opioid analgesics. Recovery of lost SWS and REM sleep occurs on postoperative nights 2–5, being later after major surgery. This coincides with the nadir of postoperative pulmonary function and several  studies have demonstrated marked hypoxaemia associated with the rebound of REM sleep. It was a logical step to attribute postoperative myocardial ischaemia, myocardial infarction, pulmonary embolism and cerebral disorder (delirium and cognitive impairment) to nocturnal hypoxaemia. However, a number of studies have failed to confirm these presumed associations,  although this does not exclude the possibility that the hypoxaemia may be important in some individuals. Key references Ambrosini MV, Giuditta B. Learning and sleep: the sequential hypothesis. Sleep Med Rev2001;5: 477–90 Dijk DJ, Lockley SW. Functional genomics of sleep and circadian rhythm: integration of human sleep-wake regulation and circadian rhythmicity.J Appl Physiol 2002;92: 852–62 Douglas N.Clinician’s Guide to Sleep Medicine. Edinburgh:Arnold, 2002   Ebrahim IO et al. The hypocretin/orexin system. J R Soc Med 2002;95: 227–30 Kryger MH, Roth T, Dement WC. (eds) Principles and Practice of Sleep Medicine, 3rd edn. Philadelphia: 2000. Nicolau MC et al.Why we sleep: the evolutionary pathway to the mammalian sleep pattern.Prog Neurobiol2000;62: 379–406 Saper CB, Chou TC, Scammell TE.The sleep switch: hypothalamic control of sleep and wakefulness.Trends Neurosci2001;24: 726–31 Shneerson JM.Handbook of Sleep Medicine. Oxford: Blackwell, 2000 Williams JM, Hanning CD. Obstructive sleep apnoea,BJA CEPD Rev2003; 3: 75–78

Blindness and Sight - Lack of Vision in Oedipus The King Essay

Blindness in Oedipus The King (Rex) What is sight? Is it just the ability to recognize one’s surroundings or is there more? Is it knowledge? Is it understanding? Can a blind man see? Can the sighted be blind? And beyond, when the truth is too terrible, do we choose not to see? The phrase "too see" has so very many connotations. One meaning is to know or to understand and the other is based on the physical aspects of things. As humans, we are distracted by the physical world, which causes us to be blinded by the most obvious of truths. Oedipus, the main character in Sophocles’ play Oedipus Rex, could not see the truth, but the blind man, Teiresias, "saw" it plainly. Sophocles’ uses blindness as a motif in the play Oedipus Rex. Oedipus, known for his intelligence, is ignorant and therefore blind, to the truth about himself and his past. Yet, when Teiresias exposes the truth he is shunned. It is left to Oedipus to overcome his "blindness," rea... ...s the sight of Oedipus , it is by his own will. The blind man seer, Teiresias, could always "see" because he did not fear the truth, nor did he have reason to. Oedipus blind to the truth, brought darkness on his eyes when the truth is found. How ironic it seems, yet still the question lies unanswered, did Oedipus fear the horrible truth so much that he chose not to see it? Or was he really so oblivious, that the truth was revealed to him near the plays end for the first time? Blindness and Sight - Lack of Vision in Oedipus The King Essay Blindness in Oedipus The King (Rex) What is sight? Is it just the ability to recognize one’s surroundings or is there more? Is it knowledge? Is it understanding? Can a blind man see? Can the sighted be blind? And beyond, when the truth is too terrible, do we choose not to see? The phrase "too see" has so very many connotations. One meaning is to know or to understand and the other is based on the physical aspects of things. As humans, we are distracted by the physical world, which causes us to be blinded by the most obvious of truths. Oedipus, the main character in Sophocles’ play Oedipus Rex, could not see the truth, but the blind man, Teiresias, "saw" it plainly. Sophocles’ uses blindness as a motif in the play Oedipus Rex. Oedipus, known for his intelligence, is ignorant and therefore blind, to the truth about himself and his past. Yet, when Teiresias exposes the truth he is shunned. It is left to Oedipus to overcome his "blindness," rea... ...s the sight of Oedipus , it is by his own will. The blind man seer, Teiresias, could always "see" because he did not fear the truth, nor did he have reason to. Oedipus blind to the truth, brought darkness on his eyes when the truth is found. How ironic it seems, yet still the question lies unanswered, did Oedipus fear the horrible truth so much that he chose not to see it? Or was he really so oblivious, that the truth was revealed to him near the plays end for the first time?

Development of a Home Messaging and Communication System Essay

This is group coursework. Groups should have between 3 to 5 people. Do only one of the assignments described below. Read everything before you decide which to tackle. Assignment 1 – Home Messaging System Many people live in a house or flat with others. People may live fairly independently with different interests and routines, or they may be more closely involved with each others’ lives. Whichever is the case, they will probably need to coordinate their activities with each other. They may benefit from ways of recording and sharing reminders about events such as appointments or significant dates. They may need ways to record and coordinate over tasks such as chores around the place. They may benefit from ways of indicating problems, requests for information or action, ways just saying â€Å"hello† and ‘greasing the wheels’ of communal living, or even ways of addressing conflicts if they occur. The messages people currently leave for each other can take many forms. They may use Post-its, whiteboards, pinboards or other surfaces that can be written on. The practices of information sharing may evolve over many years and are often designed to fit carefully into peoples’ lives. However, written messages may have disadvantages: they tend to be static and not easily updated; they also are fixed in one location, whereas people are mobile and may need access to notes and messages even when they aren’t at the location where the message was created. Coursework Instructions Research, prototype and evaluate a digital Home Messaging device or system that people in a house or flat can use to share the kinds of information they need to coordinate activities with one another and enable good, happy social relations. The details of what they can do will depend on what you find out by doing some user-research. The system you develop should have an interface within a shared space, but may also work in coordination with devices at other locations. Assignment 2 – Mobile Museum or Art Gallery System Museums and art galleries make an important contribution to our cultural landscape. A visit to a museum or art gallery can happen for many reasons. People may want to learn, be reflective, to be entertained or to have a fun day out with friends and family. People may have a deep interest in what they will see there or they may just want something to do on a rainy afternoon. Image by EmilySuran (Own work) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons Digital technology can provide opportunities for enhancing these experiences in a number of ways. They may offer information before a visit. During a visit users might want information or to communicate in some way. Mobile devices can be location-aware. For example, this can be done using QR codes. A QR (Quick Response) code (see image below) is a matrix barcode which can be scanned by a device fitted with a camera (such as a smart phone). A user could scan a code next to an exhibit to launch some location-based service. And after the visit there may be some follow-up activities, perhaps using information about what interested them. A QR code Coursework Instructions Research, prototype and evaluate a system that could be used by people to enhance their experiences in museums and/or art galleries in some way. The service could provide information and/or enhance shared experiences. It could help them learn or make things fun. The system could integrate with a web-based system to allow people to do things before or after a trip. Again, the details of will depend on what you find out by doing some user-research. General Instructions Whichever project you do it must involve the following major activities: 1. user-research 2. prototyping 3. evaluation 4. prototype revision In other words, follow an iterative design approach. Each step should inform the next. It should be clear how the research has informed the design, and how the evaluation has informed the revised design. As an alternative to traditional user-research methods you might like to try auto ethnography. Auto ethnography is an approach which seeks to describe and systematically analyse personal experience. If you do this you will be graded on the methods you use to acquire and analyse useful experiences and the quality of the insights that this gives you. For any activity that involves human participants you must complete a Middlesex University School of Engineering and Information Sciences Research Consent (Form C) and a Declaration Form and Ethical Approval Request (Form D). Have your consent form approved by your tutor before you start each phase of user engagement and have them sign your form D. The forms can be found in the ‘Useful Forms’ section of the Middlesex University, School of EIS – Ethics & Research Webpage. Assessment The work will be assessed in parts: Group Progress Review Presentation – 25% of total mark The presentation should describe the work you have done and your plans for completing the assignment. Group members will only receive a mark if they make a reasonable contribution to the presentation, with each receiving the same mark. Individual Final Report – 75% of total mark The final report should be no more than 4000 words (not including appendixes). Each group member will receive an individual mark. The report should be structured as follows (maximum marks awarded are shown in brackets as a percentage of marks awarded for the report): * Introduction (10%) * User Research (15%) * Prototype (15%) * Evaluation (15%) * Prototype revision (10%) * Discussion (10%) * Appendices containing all appropriate ethics forms1 (15%) An additional 10% will be awarded for presentation of the report. All marks will depend on the separate submission of your raw data. ——————————————– [ 1 ]. http://www.eis.mdx.ac.uk/research/groups/Alert/Ethics_Research/forms.html

Tiger Woods

Yes, we all know the stories given to us by the news, media, and internet. Tiger Woods did wrong and shared his spotlight of shame and pain. True enough he was not liked by many, but who don’t make mistakes? As an outsider that doesn’t watch golf as much, I feel that time has passed and it can be forgiven.For sake of an argument Tiger has won 95 tournaments, 71 of those on the PGA Tour, including the 1997, 2001, 2002 and 2005 Masters Tournaments, 1999, 2000, 2006 and 2007 PGA Championships, 2000, 2002, and 2008 U.  S. Open Championships, and 2000, 2005 and 2006 Open Championships. With his second Masters victory in 2001, Tiger became the first ever to hold all four professional major championships at the same time.He is the career victories leader among active players on the PGA Tour, and is the career money list leader. Not surprisingly, several of Tiger’s sponsors have now opted to abandon their alliance with him, citing his moral indiscretions as sufficient justification for this decision. But is this the right thing to do?Does the fact that Tiger Woods is not the high-quality person that we took him to be somehow negating the fact that he is an excellent golfer? Are we guilty of a category mistake if we suggest that Tiger’s sponsorships, or his opportunities to play golf, should be taken away because of his ridiculous behavior? There are two ethical questions at work here. The first question is whether one should be punished in their professional life for actions in their personal life. The second is whether it is morally justified to break a contract because of immoral behavior.I will here argue that the answer to the first question is no, while the answer to the second question depends on the nature of the contract. Some individuals, rightly appalled by Tiger’s actions, have suggested that the PGA should punish him, perhaps by suspending him from future tournaments. There are two reasons for rejecting this suggestion. There is a strong precedent against doing so, and such a response threatens to unacceptably blur the line between the public and the private sphere.Many famous people have committed scandalous actions that irreparably damage their public image. Kobe Bryant’s recent Colorado rape trial is a prime example of this. But no one suggested that Kobe not be allowed to play basketball. Magic Johnson contracted HIV through extramarital sex, but he was treated with warmth and benevolence rather than scorn. Michael Jordan had a notorious gambling problem, but he is hailed as the greatest player of all time. Why should Tiger be treated differently? There is a more general concern with abandoning this precedent.Golf is Tiger Woods’s job. There is no expectation, or requirement of employment stating that one must be a good person in order to be a good golfer. We tend to think that whether one ought to be retained in a particular job position depends on whether they are qualified for the job, rather than whether they are a generally decent person. Suggesting that Tiger, Kobe, Magic, or Jordan should not be allowed to pursue their profession in virtue of their personal indiscretions would amount to a unique kind of discrimination.From the standpoint of employment qualifications, one’s sexual behavior is usually an irrelevant consideration. This brings me to the second consideration concerning punishment in one’s professional life based on actions in one’s personal life. We tend to think that there is an important separation between one’s public life and one’s private affairs. When one is a celebrity like Tiger Woods, this line is blurred considerably, and one might claim that the loss of this distinction is the price one pays for fame.However, this imposes an arbitrary constraint on a person’s individual freedoms. If one has a right to the maintenance of a public and a private sphere, the fact that a person is famous is n ot obviously a reason for violating this right. The second ethical question raised by the Tiger Woods affair scandal concerns whether it is ethical to break a professional contract based on a person’s actions in their personal life. This is a complicated question, and I will limit the discussion to one pertinent facet of it.If Tiger Woods was hired as an endorser because of his public image and persona, and not merely because he is a good golfer, his sponsors are justified in abandoning their professional relationship for his personal actions. Consider the nature of the contract in question. Companies have hired Tiger because they believe an association with him will help them to sell their products. Tiger’s role in the contract is presumably to maintain himself as a positive force for this purpose.If Tiger has agreed to this type of relationship, anything he does that hinders his effectiveness as a marketing tool would be a violation of the contract. While we have rea son not to punish Tiger professionally, as a golfer, for what he has done in his personal life, we also have reason to punish him professionally, as an endorser, for the same actions. Virtue ethics is somewhat helpful in understanding this distinction. Tiger’s extramarital affairs do not make him a bad golfer, but they do make him a bad endorser.Different standards are at work when we evaluate Tiger the golfer and when we evaluate Tiger the endorser, and only in the latter case does his personal conduct make a relevant difference. We have thus reached an interesting conclusion. First, standards of personal conduct are only relevant to one’s professional life if the nature of one’s profession dictates as much. This leaves us with a mixed evaluation of Tiger Woods. It seems we can endorse his lost endorsements, but not any punishment from the PGA, for his extramarital affairs. It also helps us to understand how other celebrity scandals have been perceived.While Ma gic, Kobe, and Jordan are still good basketball players even though they are not particularly good people, someone like Bill Clinton harms his credibility as President in virtue of inappropriate personal conduct, because appropriate personal conduct is part of the President’s job description (or so it would seem). Our own mixed reaction to Tiger suggests that he is somewhat unique, a mixture of celebrity and quasi-statesman that we want to hold to a higher standard of conduct, despite having no good reason to do so. References (PGA TOUR, Inc. , 2010) http://www. pgatour. com/players/00/87/93/

buy custom Increasing Student Engagement and Its Effect in Mathematics essay

buy custom Increasing Student Engagement and Its Effect in Mathematics essay The stereotype encircling mathematics in the education sector has been hindering students from prospering in the subject. The pre-established notion contributes to a large part in student in developing a perception that succeeding in the subject is a challenge. From this perspective, mathematics has been perceived as subject for a few to excel. In response to the alarming stereotype on mathematics, various approaches are formulated to improve the situation and ensure students receive better grades in the subject. The article, improving student achievement in mathematics, is informative on procedure toward improving the worsening situation. The article calls for comprehensive engagement of students during learning to introduce or develop a concept from practical platform. In addition, the article illustrates the importance of establishing activities during learning that relates to the topic at hand. This contributes to developing concepts and ensuring students participate fully in the intended assignment. From this perspective, prosperity in mathematics can be achieved through collective action, change of established notions on the subject and promoting comprehensive student engagement. Notably, engaging students during learning is fundamental in facilitating visualization of the concepts in line with the syllabus expectations. From a personal perspective, activity centers are instrument in improving mathematics achievement in a classroom setting. The fact that student engagement can be achieved through activity centers, changes in the education system can foster developing mathematical concepts based on activity centers. Notably, scope of learning hugely involves interactions between educators and students. Therefore, deploying a method that maximizes interaction through activity objectives of learning can be achieved. In this case, activity centers are relevant in promoting engagement and achieve better grades in mathematics. The fact that mathematical concepts can be approached from a practical perspective, utilizing activity centers in classroom facilitates goal achievement. Therefore, activity centers not only established concepts in mathematics practically but also effective in improving students grades in the subject. Buy custom Increasing Student Engagement and Its Effect in Mathematics essay

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buy custom Health Care essay I conducted an interview on health care system with one of the educators in a healthy facility in Texas. My interest was to get information about the current local care delivery system and the relationship between the community clinical system and the public health system, and at the same time explore the interviewees expectations for future health care delivery. Below are some of the questions that I asked her, and the responses that she gave back. I asked her to comment on the current situation in local health care delivery system and she said that the situation is deteriorating day by day as compared to previous years. She said that today people are exposed to risks of being infected by various diseases like HIV/AIDS and cancer but our health facilities are lacking enough facilities to treat these patients. She also added that medicine is costly nowadays as compared to previous times due to high cost of living (Tucker Mahan, 2003). Next I asked her about the relationship between the community clinical system and the public health system, and she commented that both are out to provide health services to the sick and both are non-profit making health care organizations. The difference is that, community health systems are non-governmental organizations while the public health systems are overnmental organizations (Tucker Mahan, 2003). The next question I asked was how health care delivery has changed over the last five years and how she thinks it will change in the next five years, she answered that there has been tremendous changes in health care delivery over the last five years and that over the past five years, more diseases have come up that did not use to be common and a good example is cancer. HIV/AIDS prevalence has also gone up as compared to the past. This has put a lot of strain in the few available facilities and it is possible nowadays to find two patients sharing a bed in public hospitals. She further said that, the trend is likely to worsen in the next five years if our leaders will not come together and look for adequate health facilities and educate people on how to prevent infections like HIV/AIDS (Wagner, Moore Aryel, 2006). I asked her about the ways in which the hospital and its providers interact with the public health system and she said that the interaction between these two parties is positive, nowadays health workers go to the field to educate people on how to prevent infectious diseases like cholera, diarrhea and even HIV/AIDS which is very encouraging. I also wanted to know whether there is adequate coordination between the public health systeem and the health care delivery system in general and she answered that the coordination was very poor. A lot of public medicine like ARVs that are supposed to be supplied freely are sold, sometimes public hospitals lack basic medical services like pain killers which is so discouraging. She said that this is the reason why most people prefer going to private hospitals, though they are expensive, they offer quality services. The last question I posed to her was whether there is a health care delivery preparedness plan for a public health event such as an infectious epidemic or bioterrorist attack and she answered that in most cases, the health facilities do not prepare for these emergencies, the epidemic may break out and kill several people before the government put up measures to control the situation (Wagner, Espino, et al. 2004). The educator concluded that there is a lot to be done in our health care systems so as to serve the patients and more especially those people with limited means to pay for quality health services. She also added that we should strive to meet the goals of the world health organization which is; all health systems should provide good health, responsiveness to the expectations of the population, and fair financial contribution (Wagner, Espino, et al. 2004). Buy custom Health Care essay

Dont Be Vexed by Vexillology

Dont Be Vexed by Vexillology Dont Be Vexed by Vexillology Dont Be Vexed by Vexillology By Maeve Maddox There is historical proof that Jeanne dArc had three ensigns Two were for military use: her Battle Standard, which was large in size and her Pennon which was small. The third was a religious banner made for the priests and men of the army to assemble around for morning and evening prayers. This excerpt contains four synonyms for flag: ensign, standard, pennon, and banner. English has many others. In modern usage, an ensign is a countrys official national symbol, used to identify ships, airplanes, and official installations like military camps and embassies. This is the flag flown on patriotic occasions. A pennon was a small flag, attached to a knights lance for identification. It was long, like a streamer, and usually triangular or swallow-tailed. A standard was larger and was fixed to a pole that could be stuck in the ground. The word banner is often used for its emotional connotations, as in the U.S. national anthem: O say, does that star-spangled banner yet wave Oer the land of the free and the home of the brave. In US usage, the flag is called an ensign when it is displayed on a vessel, the colors when carried by someone on foot, and a standard when displayed on a car or an aircraft, and by the cavalry. Websters thesaurus gives the following flag synonyms, most of them not much used: banderole, banner, bannerol, burgee, color, ensign, gonfalon, gonfanon, jack, oriflamme, pendant, pennant, pennon, standard, streamer A jack is the identifying flag flown on a ship. The Union Jack is the familiar British flag. When flown on land, it is properly called simply the Union. (See Wikipedia article for a differing view on the use of Union Flag. The U.S. naval jack is the canton (the blue part with the stars) of the national ensign. NOTE: The Union Jack began as the canton of a larger flag. A burgee is a triangular pennant flown by members of yacht clubs. You can see a picture of one in the Wikipedia article on maritime flags. The word oriflamme is familiar to readers of medieval history and romance. It was the sacred banner of the French kings, first mentioned in 1124. In England, people turn out for the trooping of the colour, a patriotic parade held in June to celebrate the Queens birthday. U.S. military personnel on active service salute the colors twice a day: in the morning as the ensign is raised, and at sunset when it is lowered. In his unpleasant poem, Ethiopia Saluting the Colors, Walt Whitman uses a word not in Websters list, guidon, to refer to the cavalry flags carried by Shermans soldiers on their march to the sea. The study of flags is called vexillology. The word comes from vexillum, Latin for flag. You can find all sorts of fascinating vexillological information on the Flags of the World site. For rules and regulations surrounding the U.S. flag, and some interesting violations thereof, visit the Betsy Ross flag site. 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 Expressions category, check our popular posts, or choose a related post below:15 Terms for Those Who Tell the FutureLatin Plural Endings20 Tips to Improve your Writing Productivity

Police corruption Research Paper Example | Topics and Well Written Essays - 1750 words

Police corruption - Research Paper Example However, meat eaters are those corrupt police officers that intentionally and knowingly participate in activities of corruption and spend a considerable deal of time looking for such activities and situation from where they could extract personal gains. Furthermore, these police officers satisfy their conscience through reaffirming themselves that the people that target such as pimps, drug dealers and gamblers deserve such treatment and exploitation because they are destroying the society. Although, on a global level, police corruption levels within the United States may not be alarming enough, in absolute terms, police corruption is becoming a concern for the criminal justice system. For example, a recent study conducted in 13 different stats found out that only 56 percent of the people viewed police officers as having high and respectable ethical standard as compared to the 89 percent people that feel the same about nurses (Prenzler, p. 202). Furthermore, unlike other crimes and societal issues, it is difficult to uncover police corruption or obtain statistics about the same. Police officers are trained individuals to deal with crime and therefore, even if they are corrupt or involved in crimes, they know how to cover their tracks. Furthermore, whistle blowing can be extremely dangerous, life threatening and rare steps in the police department as evident from the case of Franck Serpico in the early 1970s. Nevertheless, over the past few decades, many scandals have appeared on the surface, which indicate that substantial police corruption is prevalent in several police department all across the United States (Office of International Criminal Justice, p. 16). Consider the example of Los Angeles Police Department Rampant Division in the late 1990s, which was rocked to its sheer core when the Rampant Scandal broke which implicated more than 6 dozen police officers in several misconducts. From unlawful shooting to

Colgate Palmolive Case Study Example | Topics and Well Written Essays - 2000 words

Colgate Palmolive - Case Study Example Colgate Palmolive principle activities are manufacturing and marketing a variety of different consumer products. The group operates through two segments and sells its products under two of the categories: This report is focused on the use of brands by the said organization and how they successfully manage to market and sell their brands all over the world. How the name of the brand is made How that brand name is retained by the company How the company manages to live up to its customers' expectations What has the company got that its brands enjoy all the trust and confidence of customers in the world Such types of questions are addressed in this report. A detailed analysis of the company products is made and significant efforts have also been made in understanding how the company operates and manages to handle of its business worldwide. After the detailed study of the company's brands and their influence on the markets, some conclusions have been made regarding the study. Entireprocessinvolved in creating a unique name andimagefor aproduct(good orservice) in theconsumers' mind, throughadvertising campaignswith aconsistenttheme. Brandingaimsto establisha significant and differentiated presence in themarketthat attracts and retains loyal customers. As it can be seen from the definition of the branding above th... After the detailed study of the company's brands and their influence on the markets, some conclusions have been made regarding the study. Literature Review Entireprocessinvolved in creating a unique name andimagefor aproduct(good orservice) in theconsumers' mind, throughadvertising campaignswith aconsistenttheme. Brandingaimsto establisha significant and differentiated presence in themarketthat attracts and retains loyal customers. As it can be seen from the definition of the branding above that it is a complete and whole process of creating a unique name and image for a product either goods or services. To whom that image is targeted by the seller is a question great significance and the answer is potential customer. How is that objective achieved is the use of different marketing and advertising tools by the manufacturer and seller of the product. Hence what branding achieves is a significant and differentiated presence in the market that helps to attract potential customers and then retain those customers. Branding is a single major driver in the success of the product when a particular product has got everything it needs to fulfill the needs of users. With famous brands it becomes easier and a bit cheaper to penetrate the market and sell the new product with full hope and confidence. Recent times have seen many companies becoming successful due to their brand names and even selling their products at higher rates than the rates of similar products being sold in the market. Brand Identity Another main feature of this brand game is the brand identity, which helps its consumers to recognize it with its appearance irrespective of the fact that

The Career of a Physician Assistant Personal Statement

The Career of a Physician Assistant - Personal Statement Example Technology for Medical and Health Professions, I received the relevant premed school training thanks to their intensive and comprehensive courses in health, science, and chemistry courses. This training included hands-on clinical rotation experience at the Valley Baptist Medical Center as well. I firmly believe that my experience at this particular satellite school helped mold me into the personification of the epitome of the UT Health Science Physician Assistant. As a Med Tech student at the satellite school, I was privileged to have been given an opportunity to be part of weekly department rotations. The rotation schedules allowed me to assist doctors, nurses, and other medical staff. However, it was my stint as an assistant to a physician assistant that helped cement my plans for the future. I took the time to observe these qualified physician assistants go about their tasks with the doctors in charge. I came to realize that I had found my calling as a physician assistant. I would be able to help doctors in the performance of their duties through a range of healthcare procedures and duties that I would be specifically trained for if and when I complete my training as a Physician Assistant. My goal in pursuing this line of education is to be able to return to my community, armed and educated in the medical field of my choice. My return will mark the day that I fulfill my personal pact to contribute to the improvement of the mental, social, and physical well-being of the under-served and vulnerable people of my community. I humbly present myself to the UTHSCA PA admissions board in the hopes of being granted an opportunity to learn about becoming an exemplary Physician Assistant from the best educators in the state.

THE PRACTICE OF PUBLIC ADMINISTRATION Research Paper

THE PRACTICE OF PUBLIC ADMINISTRATION - Research Paper Example Ferris proved to be an abundant source of ideas and could draft reports for Turner in a breeze and could deal with awkward customers effectively. Ferris influence on Turner grew to the point that he could make decisions in Turners behalf. Other managers particularly Blackham became resentful of this alleging that Turner abdicated his leadership to Ferris because it seemed that it is Ferris who is running his office. Soon, Ferris demanded to be promoted as Deputy Sales Manager which Turner agreed. Upon asking the Director of Sales for the position to be created, he was asked why so when his department is small to warrant a deputy. Turner was forced to disclose that he had been depending on Ferris to get things done that much of the responsibilities in his department is already headed by Ferris. The Sales Director was dismayed and is now considering whether or not he should intervene and impose changes. II. Appraisal of the situation Charles Turner dependency towards Jim Ferris finally took its toll when Ferris demanded to be his Deputy that made the Sales Director consider whether or not he should intervene and impose changes. ... Ferris also begun building his â€Å"own empire† in the department placing his own people in key positions while he taking over the majority posts. Ferris growing dominance in the department will of course not go unnoticed. Other managers are beginning to notice it and Turner is slowly beginning to lose respect from them as he â€Å"abdicated† his responsibilities to Ferris. The delegation turned into dependency that also created friction in the organization. Obviously, Turner had lapses g from the beginning he assumed office because he was not able to gain confidence in leading and managing his department since he was promoted. The managerial lapses or lack of managerial capability of Turner is best summed up in the lecture prepared Dr. Abdul M Baksh that while â€Å"consulting subordinates is often regarded as delegation of authority, and the manager may receive a decision rather than advice . . . the manager must bear in mind that such advice may also have the undes irable effect of not only putting pressure on him but also expose him to conflicting alignments of forces within his own ranks†. This was exactly what happened to Turner’s over dependency towards Ferris or in Blackham’s terms, abdicated his function to Ferris. Now, other managers are also becoming jealous of Ferris and are also demanding greater responsibility and are now being resentment of Turner’s seeming favoritism towards Ferris. Ferris now has huge bargaining leverage towards Turner because he knows that Turner depends on him and so he asked to be his deputy even if the position does not yet exist and that there are other more senior manager than him in the department. The Sales Director is dismayed knowing this because

Routine CT scanning protocols of head, chest and abdomen Essay

Routine CT scanning protocols of head, chest and abdomen - Essay Example As with the benefits of any new medical technology, CT also has its share of woes in terms of exposure of patients to high dose radiation. It is challenging to optimise and reduce the dose without compromising the image quality and resolution. This paper aims at bringing out optimization of the radiation dosage by modifying existing parameters based on latest discoveries and innovations. The most direct method of reducing the radiation dose reduction is that of decreasing the tube voltage and tube potential. However, the use of other techniques including Automatic Emission Control, Imaging Filters and Noise Reducing Filters also aid in reduction of radiation dosage without diminishing the image quality. The machines used for routine CT at KSMC are the General Electronics system, the Philips system and the Siemens Somatome Sensation 16 Slice. For this evaluation, I would focus on the Siemens system as my experience is confined to the same. The CT scanning protocols for head, chest and abdomen will be covered in this paper. CT can be performed with or without contrast and the procedure essentially depends on the physician performing the imaging procedure. Table 1 shows the numerous parameters and dimensions for the CT scan of the human skull using KSMC’s protocol. Skull imaginative view, reconnoitre vision of the brain SOM (supra orbito meatal) line are the baselines for this assessment. This protocol does not use IV contrast or oral contrast. The second protocol used is for mass lesion or tumour. The second protocol is similar to the first one but uses IV contrast that is set between 100cc to 120cc of Omnipaque 350. Patient preparation and training vary for protocols with and without contrast. In protocols using no contrast, patient training is not necessary, while procedures using contrast require that the four elementary steps be completed, the steps being; only one CT scan

Individual differences and second language acquisition Essay

Individual differences and second language acquisition - Essay Example ional or biological factors enhance the differences amid humans, and there are ways that individuals use to learn their variations, although their interaction and introspection with other individuals can be similar. In this regard, it is crucial to evaluate the individual differences that influence second language acquisition. Among the factors that will be evaluate include; age, learning styles, individual motivation, learning strategies, sex, personality and aptitude. One of the most influential individual differences that affect the acquisition of second language is age. Ehrman, Leaver and Oxford (2003) hold that children and young individuals have a better chance of acquiring a second language as compared to older individuals; the argument is that there is a certain age limit at which children have the ability to acquire a second language at a faster rate. Beyond that age, physiological transformations in the brain force it to lose its capacity to intake new functions of acquiring a new language. For persons that have been deprived off the ability for linguistic input require a trigger that enhances the acquisition of the first language and this occurs at a critical period. Zafar and Meenakshi (2012) cite a case in which a 13 year old girl that had been abused and kept away from any languages was rescued; unfortunately, regardless of the numerous efforts to teach her the first language so as she would communicate, Genie never learnt the languag e. This finding led to a long and controversial debate which sought to determine the appropriate time in which an individual can acquire a new language. In other words, scholars held that there is a critical period at which an individual can acquire a new language and it is controlled by the physiological transformations that take place in the brain. The explanation given is that as an individual becomes older, the level of self-conscious increases and it hinders the ability to learn a second language. The sensitive

Routine CT scanning protocols of head, chest and abdomen Essay

Routine CT scanning protocols of head, chest and abdomen - Essay Example As with the benefits of any new medical technology, CT also has its share of woes in terms of exposure of patients to high dose radiation. It is challenging to optimise and reduce the dose without compromising the image quality and resolution. This paper aims at bringing out optimization of the radiation dosage by modifying existing parameters based on latest discoveries and innovations. The most direct method of reducing the radiation dose reduction is that of decreasing the tube voltage and tube potential. However, the use of other techniques including Automatic Emission Control, Imaging Filters and Noise Reducing Filters also aid in reduction of radiation dosage without diminishing the image quality. The machines used for routine CT at KSMC are the General Electronics system, the Philips system and the Siemens Somatome Sensation 16 Slice. For this evaluation, I would focus on the Siemens system as my experience is confined to the same. The CT scanning protocols for head, chest and abdomen will be covered in this paper. CT can be performed with or without contrast and the procedure essentially depends on the physician performing the imaging procedure. Table 1 shows the numerous parameters and dimensions for the CT scan of the human skull using KSMC’s protocol. Skull imaginative view, reconnoitre vision of the brain SOM (supra orbito meatal) line are the baselines for this assessment. This protocol does not use IV contrast or oral contrast. The second protocol used is for mass lesion or tumour. The second protocol is similar to the first one but uses IV contrast that is set between 100cc to 120cc of Omnipaque 350. Patient preparation and training vary for protocols with and without contrast. In protocols using no contrast, patient training is not necessary, while procedures using contrast require that the four elementary steps be completed, the steps being; only one CT scan

The Child Essay Example for Free

The Child Essay Introduction Good afternoon everyone. Today I’m going to talk to you about the high/scope approach in a childcare setting. I’d like to start off by saying for parents I believe a main concern of theirs at this stage of their child’s life if they are sending their child to a childcare setting is finding the best the setting, approach and childcare workers to suit their child needs. High/Scope was established in 1970 by Dr. David P. Weikart, who started the organization to continue research and program activities Dr. Weikart retired in December 2000 and is now deceased; Dr. Lawrence J.Schweinhart is now the HighScope Foundations President. The name High/Scope and its corporate logos are registered trademarks and service marks of the High/Scope Foundation. The high/scope method has being developed over a forty year process it has been shaped by research and while in practice and has been so successful that it is known and used around the world in multiple of childcare settings. For example day care, play groups and primary schools just to name a few. In my opinion the main idea of this approach is that children learn actively independently and naturally while interacting with materials and people. This approach observes, identifies and helps develop children’s main interest and skills. A point in this approach that I found most interesting was their idea that they don’t want the children’s activities to be thought in an institutional manner and if the children make mistakes they are not viewed as mistakes they are viewed as part of learning. The High/Scope environment helps the children to learn while active. For example a child will learn how to talk to others and develop their speech by being involved in conversation with other children and childcare workers. The setting has specific interest areas and activities for example the painting area, home area and block area they are clearly defined so there is no confusing for the children of what that certain area is used for. A block area would not have a little play kitchen in it cause that will confuse the children on what the area is used for. Clear containers are in child height shelving units so they are easily accessible to the children. The containers are clearly word and photo labelled; this will help the children learn the connection between labels, words and  symbols. The children will be able to see what they want and get it without having to look through loads of boxes before finding it for example Bryan wants to play with the blue tractor so he goes to the toy area where the shelves are at his visual height looks at the boxes sees the picture with the tractors on it, the words tractor above it and can get it himself without having to get a childcare worker to look for it or go up high and get it for him, he also can return it after he has finished with it. This encourages the children to practice the Find, Use and Return cycle. The hoped outcome for the children in the setting is that they develop a positive attitude towards themselves and others grow in self-confidence and so on and overall benefit from this approach for their future. ‘A study found that adults at age 40 who had the preschool program had higher earnings, were more likely to hold a job’. Achieving this requires the right environment, materials, trained childcare workers and a successful partnership between both childcare workers and parents. Parent’s involvement is crucial to the high scope approach. The partnership between the parent and the childcare worker will make it easier for the child to be at ease in the setting and with the staff. The childcare workers and the parent’s partnership approach which keeps an on-going passing of information which in turn keeps both adult carers equally informed. Childcare workers document and take daily notes of what they have seen, heard and what has happened while the children are in their care. Observations help the childcare workers plan activities for the next day. For example while the children played with the blocks Anne kept on wandering over to the painting area, so at the activity planning meeting it would be suggested we take Anne’s interest of painting and involve it during the day. Children are assessed daily to observe the level of their development and to see if the activities the children participate in help their development. Children are assessed in ways that the children and adults feel comfortable when information is collected all assessments should provide an educational outcome. The observations are shared with parents at the end of the year and they usually very interested to see how and what their children have been doing. ‘The COR (Child Observation Record) is used to evaluate child progress in High/Scope infant-toddler and preschool programs. The Preschool Program Quality Assessment (PQA) is used to evaluate the quality of the program, focusing on five key areas: learning environment, daily routine, adult-child interaction, and curriculum planning and assessment, and parent involvement. I hoped you enjoyed my presentation. And if you have any question I would be happy to answer them as best as I can. Thank you for listening.

Fluids In Rigid Body Motion Engineering Essay

Fluids In Rigid Body Motion Engineering Essay 11-38C A moving body of fluid can be treated as a rigid body when there are no shear stresses (i.e., no motion between fluid layers relative to each other) in the fluid body. 11-39C A glass of water is considered. The water pressure at the bottom surface will be the same since the acceleration for all four cases is zero. 11-40C The pressure at the bottom surface is constant when the glass is stationary. For a glass moving on a horizontal plane with constant acceleration, water will collect at the back but the water depth will remain constant at the center. Therefore, the pressure at the midpoint will be the same for both glasses. But the bottom pressure will be low at the front relative to the stationary glass, and high at the back (again relative to the stationary glass). Note that the pressure in all cases is the hydrostatic pressure, which is directly proportional to the fluid height. 11-41C When a vertical cylindrical container partially filled with water is rotated about its axis and rigid body motion is established, the fluid level will drop at the center and rise towards the edges. Noting that hydrostatic pressure is proportional to fluid depth, the pressure at the mid point will drop and the pressure at the edges of the bottom surface will rise due to rotation. 11-42 A water tank is being towed by a truck on a level road, and the angle the free surface makes with the horizontal is measured. The acceleration of the truck is to be determined. ax  Ã‚ ± = 15 ° Water tank Assumptions 1 The road is horizontal so that acceleration has no vertical component (az = 0). 2 Effects of splashing, breaking, driving over bumps, and climbing hills are assumed to be secondary, and are not considered. 3 The acceleration remains constant. Analysis We take the x-axis to be the direction of motion, the z-axis to be the upward vertical direction. The tangent of the angle the free surface makes with the horizontal is Solving for ax and substituting, Discussion Note that the analysis is valid for any fluid with constant density since we used no information that pertains to fluid properties in the solution. 11-43 Two water tanks filled with water, one stationary and the other moving upwards at constant acceleration. The tank with the higher pressure at the bottom is to be determined. Tank A 8 m Water az = 5 m/s2 Tank B 2 m Water g z 0  · 2  · 1  · 2  · 1 Assumptions 1 The acceleration remains constant. 2 Water is an incompressible substance. Properties We take the density of water to be 1000 kg/m3. Analysis The pressure difference between two points 1 and 2 in an incompressible fluid is given by or since ax = 0. Taking point 2 at the free surface and point 1 at the tank bottom, we have and and thus Tank A: We have az = 0, and thus the pressure at the bottom is Tank B: We have az = +5 m/s2, and thus the pressure at the bottom is Therefore, tank A has a higher pressure at the bottom. Discussion We can also solve this problem quickly by examining the relation . Acceleration for tank B is about 1.5 times that of Tank A (14.81 vs 9.81 m/s2), but the fluid depth for tank A is 4 times that of tank B (8 m vs 2 m). Therefore, the tank with the larger acceleration-fluid height product (tank A in this case) will have a higher pressure at the bottom. 11-44 A water tank is being towed on an uphill road at constant acceleration. The angle the free surface of water makes with the horizontal is to be determined, and the solution is to be repeated for the downhill motion case. z x az ax  Ã‚ ¡ = 20 ° - Ã‚ ± Downhill motion Uphill motion z x ax Free surface az Water tank  Ã‚ ¡ = 20 °  Ã‚ ± Horizontal Assumptions 1 Effects of splashing, breaking, driving over bumps, and climbing hills are assumed to be secondary, and are not considered. 2 The acceleration remains constant. Analysis We take the x- and z-axes as shown in the figure. From geometrical considerations, the horizontal and vertical components of acceleration are The tangent of the angle the free surface makes with the horizontal is  ®  Ã‚ ± = 22.2 ° When the direction of motion is reversed, both ax and az are in negative x- and z-direction, respectively, and thus become negative quantities, Then the tangent of the angle the free surface makes with the horizontal becomes  ®  Ã‚ ± = 30.1 ° Discussion Note that the analysis is valid for any fluid with constant density, not just water, since we used no information that pertains to water in the solution. 11-45E A vertical cylindrical tank open to the atmosphere is rotated about the centerline. The angular velocity at which the bottom of the tank will first be exposed, and the maximum water height at this moment are to be determined.  Ã‚ · 2 ft z r 0 Assumptions 1 The increase in the rotational speed is very slow so that the liquid in the container always acts as a rigid body. 2 Water is an incompressible fluid. Analysis Taking the center of the bottom surface of the rotating vertical cylinder as the origin (r = 0, z = 0), the equation for the free surface of the liquid is given as where h0 = 1 ft is the original height of the liquid before rotation. Just before dry spot appear at the center of bottom surface, the height of the liquid at the center equals zero, and thus zs(0) = 0. Solving the equation above for  Ã‚ · and substituting, Noting that one complete revolution corresponds to 2 Ã‚ ° radians, the rotational speed of the container can also be expressed in terms of revolutions per minute (rpm) as Therefore, the rotational speed of this container should be limited to 108 rpm to avoid any dry spots at the bottom surface of the tank. The maximum vertical height of the liquid occurs a the edges of the tank (r = R = 1 ft), and it is Discussion Note that the analysis is valid for any liquid since the result is independent of density or any other fluid property. 11-46 A cylindrical tank is being transported on a level road at constant acceleration. The allowable water height to avoid spill of water during acceleration is to be determined D=40 cm ax = 4 m/s2  Ã‚ ± htank =60 cm  Ã¢â‚¬Å¾z Water tank Assumptions 1 The road is horizontal during acceleration so that acceleration has no vertical component (az = 0). 2 Effects of splashing, breaking, driving over bumps, and climbing hills are assumed to be secondary, and are not considered. 3 The acceleration remains constant. Analysis We take the x-axis to be the direction of motion, the z-axis to be the upward vertical direction, and the origin to be the midpoint of the tank bottom. The tangent of the angle the free surface makes with the horizontal is (and thus  Ã‚ ± = 22.2 °) The maximum vertical rise of the free surface occurs at the back of the tank, and the vertical midplane experiences no rise or drop during acceleration. Then the maximum vertical rise at the back of the tank relative to the midplane is Therefore, the maximum initial water height in the tank to avoid spilling is Discussion Note that the analysis is valid for any fluid with constant density, not just water, since we used no information that pertains to water in the solution. 11-47 A vertical cylindrical container partially filled with a liquid is rotated at constant speed. The drop in the liquid level at the center of the cylinder is to be determined. z r  Ã‚ · zs R = 20 cm Free surface ho = 60 cm g Assumptions 1 The increase in the rotational speed is very slow so that the liquid in the container always acts as a rigid body. 2 The bottom surface of the container remains covered with liquid during rotation (no dry spots). Analysis Taking the center of the bottom surface of the rotating vertical cylinder as the origin (r = 0, z = 0), the equation for the free surface of the liquid is given as where h0 = 0.6 m is the original height of the liquid before rotation, and Then the vertical height of the liquid at the center of the container where r = 0 becomes Therefore, the drop in the liquid level at the center of the cylinder is Discussion Note that the analysis is valid for any liquid since the result is independent of density or any other fluid property. Also, our assumption of no dry spots is validated since z0(0) is positive. 11-48 The motion of a fish tank in the cabin of an elevator is considered. The pressure at the bottom of the tank when the elevator is stationary, moving up with a specified acceleration, and moving down with a specified acceleration is to be determined. Fish Tank  · 2 az = 3 m/s2 h = 40 cm g z Water  · 1 0 Assumptions 1 The acceleration remains constant. 2 Water is an incompressible substance. Properties We take the density of water to be 1000 kg/m3. Analysis The pressure difference between two points 1 and 2 in an incompressible fluid is given by or since ax = 0. Taking point 2 at the free surface and point 1 at the tank bottom, we have and and thus (a) Tank stationary: We have az = 0, and thus the gage pressure at the tank bottom is (b) Tank moving up: We have az = +3 m/s2, and thus the gage pressure at the tank bottom is (c) Tank moving down: We have az = -3 m/s2, and thus the gage pressure at the tank bottom is Discussion Note that the pressure at the tank bottom while moving up in an elevator is almost twice that while moving down, and thus the tank is under much greater stress during upward acceleration. 11-49 vertical cylindrical milk tank is rotated at constant speed, and the pressure at the center of the bottom surface is measured. The pressure at the edge of the bottom surface is to be determined. z r  Ã‚ · zs R = 1.50 m Free surface g 0 ho Assumptions 1 The increase in the rotational speed is very slow so that the liquid in the container always acts as a rigid body. 2 Milk is an incompressible substance. Properties The density of the milk is given to be 1030 kg/m3. Analysis Taking the center of the bottom surface of the rotating vertical cylinder as the origin (r = 0, z = 0), the equation for the free surface of the liquid is given as where R = 1.5 m is the radius, and The fluid rise at the edge relative to the center of the tank is The pressure difference corresponding to this fluid height difference is Then the pressure at the edge of the bottom surface becomes Discussion Note that the pressure is 14% higher at the edge relative to the center of the tank, and there is a fluid level difference of nearly 2 m between the edge and center of the tank, and these large differences should be considered when designing rotating fluid tanks. 11-50 Milk is transported in a completely filled horizontal cylindrical tank accelerating at a specified rate. The maximum pressure difference in the tanker is to be determined. Æ’-EES ax = 3 m/s2  · 1 z x 0 g  · 2 Assumptions 1 The acceleration remains constant. 2 Milk is an incompressible substance. Properties The density of the milk is given to be 1020 kg/m3. Analysis We take the x- and z- axes as shown. The horizontal acceleration is in the negative x direction, and thus ax is negative. Also, there is no acceleration in the vertical direction, and thus az = 0. The pressure difference between two points 1 and 2 in an incompressible fluid in linear rigid body motion is given by  ® The first term is due to acceleration in the horizontal direction and the resulting compression effect towards the back of the tanker, while the second term is simply the hydrostatic pressure that increases with depth. Therefore, we reason that the lowest pressure in the tank will occur at point 1 (upper front corner), and the higher pressure at point 2 (the lower rear corner). Therefore, the maximum pressure difference in the tank is since x1 = 0, x2 = 7 m, z1 = 3 m, and z2 = 0. Discussion Note that the variation of pressure along a horizontal line is due to acceleration in the horizontal direction while the variation of pressure in the vertical direction is due to the effects of gravity and acceleration in the vertical direction (which is zero in this case). 11-51 Milk is transported in a completely filled horizontal cylindrical tank decelerating at a specified rate. The maximum pressure difference in the tanker is to be determined. Æ’-EES z x  · 2  · 1 g ax = 3 m/s2 Assumptions 1 The acceleration remains constant. 2 Milk is an incompressible substance. Properties The density of the milk is given to be 1020 kg/m3. Analysis We take the x- and z- axes as shown. The horizontal deceleration is in the x direction, and thus ax is positive. Also, there is no acceleration in the vertical direction, and thus az = 0. The pressure difference between two points 1 and 2 in an incompressible fluid in linear rigid body motion is given by  ® The first term is due to deceleration in the horizontal direction and the resulting compression effect towards the front of the tanker, while the second term is simply the hydrostatic pressure that increases with depth. Therefore, we reason that the lowest pressure in the tank will occur at point 1 (upper front corner), and the higher pressure at point 2 (the lower rear corner). Therefore, the maximum pressure difference in the tank is since x1 = 7 m, x2 = 0, z1 = 3 m, and z2 = 0. Discussion Note that the variation of pressure along a horizontal line is due to acceleration in the horizontal direction while the variation of pressure in the vertical direction is due to the effects of gravity and acceleration in the vertical direction (which is zero in this case). 11-52 A vertical U-tube partially filled with alcohol is rotated at a specified rate about one of its arms. The elevation difference between the fluid levels in the two arms is to be determined. z r 0 h0 = 20 cm R = 25 cm Assumptions 1 Alcohol is an incompressible fluid. Analysis Taking the base of the left arm of the U-tube as the origin (r = 0, z = 0), the equation for the free surface of the liquid is given as where h0 = 0.20 m is the original height of the liquid before rotation, and  Ã‚ · = 4.2 rad/s. The fluid rise at the right arm relative to the fluid level in the left arm (the center of rotation) is Discussion Note that the analysis is valid for any liquid since the result is independent of density or any other fluid property. 11-53 A vertical cylindrical tank is completely filled with gasoline, and the tank is rotated about its vertical axis at a specified rate. The pressures difference between the centers of the bottom and top surfaces, and the pressures difference between the center and the edge of the bottom surface are to be determined. Æ’-EES h = 3 m D = 1.20 m z r 0 Assumptions 1 The increase in the rotational speed is very slow so that the liquid in the container always acts as a rigid body. 2 Gasoline is an incompressible substance. Properties The density of the gasoline is given to be 740 kg/m3. Analysis The pressure difference between two points 1 and 2 in an incompressible fluid rotating in rigid body motion is given by where R = 0.60 m is the radius, and (a) Taking points 1 and 2 to be the centers of the bottom and top surfaces, respectively, we have and . Then, (b) Taking points 1 and 2 to be the center and edge of the bottom surface, respectively, we have , , and . Then, Discussion Note that the rotation of the tank does not affect the pressure difference along the axis of the tank. But the pressure difference between the edge and the center of the bottom surface (or any other horizontal plane) is due entirely to the rotation of the tank. 11-54 Problem 11-53 is reconsidered. The effect of rotational speed on the pressure difference between the center and the edge of the bottom surface of the cylinder as the rotational speed varies from 0 to 500 rpm in increments of 50 rpm is to be investigated. g=9.81 m/s2 rho=740 kg/m3 R=0.6 m h=3 m omega=2*pi*n_dot/60 rad/s DeltaP_axis=rho*g*h/1000 kPa DeltaP_bottom=rho*omega^2*R^2/2000 kPa Rotation rate , rpm Angular speed  Ã‚ ·, rad/s  Ã¢â‚¬Å¾Pcenter-edge kPa 0 50 100 150 200 250 300 350 400 450 500 0.0 5.2 10.5 15.7 20.9 26.2 31.4 36.7 41.9 47.1 52.4 0.0 3.7 14.6 32.9 58.4 91.3 131.5 178.9 233.7 295.8 365.2 11-55E A water tank partially filled with water is being towed by a truck on a level road. The maximum acceleration (or deceleration) of the truck to avoid spilling is to be determined. ax  Ã¢â‚¬Å¾h = 2 ft  Ã‚ ± Water tank hw = 6 ft z x 0 L=20 ft Assumptions 1 The road is horizontal so that acceleration has no vertical component (az = 0). 2 Effects of splashing, breaking, driving over bumps, and climbing hills are assumed to be secondary, and are not considered. 3 The acceleration remains constant. Analysis We take the x-axis to be the direction of motion, the z-axis to be the upward vertical direction. The shape of the free surface just before spilling is shown in figure. The tangent of the angle the free surface makes with the horizontal is given by  ® where az = 0 and, from geometric considerations, tan Ã‚ ± is Substituting, The solution can be repeated for deceleration by replacing ax by ax. We obtain ax = -6.44 m/s2. Discussion Note that the analysis is valid for any fluid with constant density since we used no information that pertains to fluid properties in the solution. 11-56E A water tank partially filled with water is being towed by a truck on a level road. The maximum acceleration (or deceleration) of the truck to avoid spilling is to be determined. ax  Ã¢â‚¬Å¾h = 0.5 ft  Ã‚ ± Water tank hw = 3 ft z x 0 L= 8 ft Assumptions 1 The road is horizontal so that deceleration has no vertical component (az = 0). 2 Effects of splashing and driving over bumps are assumed to be secondary, and are not considered. 3 The deceleration remains constant. Analysis We take the x-axis to be the direction of motion, the z-axis to be the upward vertical direction. The shape of the free surface just before spilling is shown in figure. The tangent of the angle the free surface makes with the horizontal is given by  ® where az = 0 and, from geometric considerations, tan Ã‚ ± is Substituting, Discussion Note that the analysis is valid for any fluid with constant density since we used no information that pertains to fluid properties in the solution. 11-57 Water is transported in a completely filled horizontal cylindrical tanker accelerating at a specified rate. The pressure difference between the front and back ends of the tank along a horizontal line when the truck accelerates and decelerates at specified rates. Æ’-EES ax = 3 m/s2 z x 0 1  · 2 g  · Assumptions 1 The acceleration remains constant. 2 Water is an incompressible substance. Properties We take the density of the water to be 1000 kg/m3. Analysis (a) We take the x- and z- axes as shown. The horizontal acceleration is in the negative x direction, and thus ax is negative. Also, there is no acceleration in the vertical direction, and thus az = 0. The pressure difference between two points 1 and 2 in an incompressible fluid in linear rigid body motion is given by  ® since z2 z1 = 0 along a horizontal line. Therefore, the pressure difference between the front and back of the tank is due to acceleration in the horizontal direction and the resulting compression effect towards the back of the tank. Then the pressure difference along a horizontal line becomes since x1 = 0 and x2 = 7 m. (b) The pressure difference during deceleration is determined the way, but ax = 4 m/s2 in this case, Discussion Note that the pressure is higher at the back end of the tank during acceleration, but at the front end during deceleration (during breaking, for example) as expected. Review Problems 11-58 The density of a wood log is to be measured by tying lead weights to it until both the log and the weights are completely submerged, and then weighing them separately in air. The average density of a given log is to be determined by this approach. Properties The density of lead weights is given to be 11,300 kg/m3. We take the density of water to be 1000 kg/m3. Analysis The weight of a body is equal to the buoyant force when the body is floating in a fluid while being completely submerged in it (a consequence of vertical force balance from static equilibrium). In this case the average density of the body must be equal to the density of the fluid since Lead, 34 kg Log, 1540 N FB Water Therefore, where Substituting, the volume and density of the log are determined to be Discussion Note that the log must be completely submerged for this analysis to be valid. Ideally, the lead weights must also be completely submerged, but this is not very critical because of the small volume of the lead weights. 11-59 A rectangular gate that leans against the floor with an angle of 45 ° with the horizontal is to be opened from its lower edge by applying a normal force at its center. The minimum force F required to open the water gate is to be determined. Assumptions 1 The atmospheric pressure acts on both sides of the gate, and thus it can be ignored in calculations for convenience. 2 Friction at the hinge is negligible. Properties We take the density of water to be 1000 kg/m3 throughout. Analysis The length of the gate and the distance of the upper edge of the gate (point B) from the free surface in the plane of the gate are FR F 45 ° B 0.5 m 3 m A The average pressure on a surface is the pressure at the centroid (midpoint) of the surface, and multiplying it by the plate area gives the resultant hydrostatic on the surface, The distance of the pressure center from the free surface of water along the plane of the gate is The distance of the pressure center from the hinge at point B is Taking the moment about point B and setting it equal to zero gives Solving for F and substituting, the required force is determined to be Discussion The applied force is inversely proportional to the distance of the point of application from the hinge, and the required force can be reduced by applying the force at a lower point on the gate. 11-60 A rectangular gate that leans against the floor with an angle of 45 ° with the horizontal is to be opened from its lower edge by applying a normal force at its center. The minimum force F required to open the water gate is to be determined. Assumptions 1 The atmospheric pressure acts on both sides of the gate, and thus it can be ignored in calculations for convenience. 2 Friction at the hinge is negligible. Properties We take the density of water to be 1000 kg/m3 throughout. FR F 45 ° B 1.2 m 3 m AAnalysis The length of the gate and the distance of the upper edge of the gate (point B) from the free surface in the plane of the gate are The average pressure on a surface is the pressure at the centroid (midpoint) of the surface, and multiplying it by the plate area gives the resultant hydrostatic on the surface, The distance of the pressure center from the free surface of water along the plane of the gate is The distance of the pressure center from the hinge at point B is Taking the moment about point B and setting it equal to zero gives Solving for F and substituting, the required force is determined to be Discussion The applied force is inversely proportional to the distance of the point of application from the hinge, and the required force can be reduced by applying the force at a lower point on the gate. 11-61 A rectangular gate hinged about a horizontal axis along its upper edge is restrained by a fixed ridge at point B. The force exerted to the plate by the ridge is to be determined. Assumptions The atmospheric pressure acts on both sides of the gate, and thus it can be ignored in calculations for convenience. FR 3 m A 2 m ypProperties We take the density of water to be 1000 kg/m3 throughout. Analysis The average pressure on a surface is the pressure at the centroid (midpoint) of the surface, and multiplying it by the plate area gives the resultant hydrostatic force on the gate, The vertical distance of the pressure center from the free surface of water is 11-62 A rectangular gate hinged about a horizontal axis along its upper edge is restrained by a fixed ridge at point B. The force exerted to the plate by the ridge is to be determined. Assumptions The atmospheric pressure acts on both sides of the gate, and thus it can be ignored in calculations for convenience. FR 3 m yP h = 2 m A Properties We take the density of water to be 1000 kg/m3 throughout. Analysis The average pressure on a surface is the pressure at the centroid (midpoint) of the surface, and multiplying it by the wetted plate area gives the resultant hydrostatic force on the gate, The vertical distance of the pressure center from the free surface of water is 11-63E A semicircular tunnel is to be built under a lake. The total hydrostatic force acting on the roof of the tunnel is to be determined. Assumptions The atmospheric pressure acts on both sides of the tunnel, and thus it can be ignored in calculations for convenience. Properties We take the density of water to be 62.4 lbm/ft3 throughout. Analysis We consider the free body diagram of the liquid block enclosed by the circular surface of the tunnel and its vertical (on both sides) and horizontal projections. The hydrostatic forces acting on the vertical and horizontal plane surfaces as well as the weight of the liquid block are determined as follows: Horizontal force on vertical surface (each side): Fy W Fx Fx Vertical force on horizontal surface (downward): R = 15 ft Weight of fluid block on each side within the control volume (downward): Therefore, the net downward vertical force is This is also the net force acting on the tunnel since the horizontal forces acting on the right and left side of the tunnel cancel each other since they are equal ad opposite. 11-64 A hemispherical dome on a level surface filled with water is to be lifted by attaching a long tube to the top and filling it with water. The required height of water in the tube to lift the dome is to be determined. Assumptions 1 The atmospheric pressure acts on both sides of the dome, and thus it can be ignored in calculations for convenience. 2 The weight of the tube and the water in it is negligible. Properties We take the density of water to be 1000 kg/m3 throughout. Analysis We take the dome and the water in it as the system.à ¢Ã¢â€š ¬Ã¢â‚¬Å¡ When the dome is about to rise, the reaction force between the dome and the ground becomes zero. Then the free body diagram of this system involves the weights of the dome and the water, balanced by the hydrostatic pressure force from below. Setting these forces equal to each other gives FV R = 3 m h W Solving for h gives Substituting, Therefore, this dome can be lifted by attaching a tube which is 2.02 m long. Discussion This problem can also be solved without finding FR by finding the lines of action of the horizontal hydrostatic force and the weight. 11-65 The water in a reservoir is restrained by a triangular wall. The total force (hydrostatic + atmospheric) acting on the inner surface of the wall and the horizontal component of this force are to be determined. FR h = 25 m ypAssumptions 1 The atmospheric pressure acts on both sides of the gate, and thus it can be ignored in calculations for convenience. 2 Friction at the hinge is negligible. Properties We take the density of water to be 1000 kg/m3 throughout. Analysis The length of the wall surface underwater is The average pressure on a surface is the pressure at the centroid (midpoint) of the surface, and multiplying it by the plate area gives the resultant hydrostatic force on the surface, Noting that the distance of the pressure center from the free surface of water along the wall surface is The magnitude of the horizontal component of the hydrostatic force is simply FRsin  Ã‚ ±, Discussion The atmospheric pressure is usually ignored in the analysis for convenience since it acts on both sides of the walls. 11-66 A U-tube that contains water in right arm and another liquid in the left is rotated about an axis closer to the left arm. For a known rotation rate at which the liquid levels in both arms are the same, the density of the fluid in the left arm is to be determined. 1*  ·  · 1 Fluid Water

Literature and Time Periods :: Writing History Essays

Literature and Time Periods As history has a tendency to categorize events into eras by the time periods that surround them, so does literature with its works. Both categorizations are superficial, ignoring significant distinctions that separate material for the sake of convenience, or present perception. The prehistoric era, for example, is a superficial designation for all time before written historical records, even though there are distinctions within this period, which are markedly different in historical terms. â€Å"Medieval† is defined by Webster’s II New Riverside Dictionary as â€Å"the period of European History extending approximately from A.D. 476 to 1453.† Fortunately, for convenience, this span of time encompasses both the Old English period and the Middle English period as well. As exemplified by the Old English poem Beowulf and the Middle English poetry of Chaucer and the Canterbury Tales and their cohabitation under the heading of â€Å"Medieval Literature†, thi s categorization is not only superficial, but also inaccurate. One defining difference between the two periods of literature and their selected representatives is the language from which they are spawned. Old English was a Germanic dialect spoken by a people who were composed mainly of Angles and Saxons, intermixed with Jutes, Frisians, and Celts, with some Roman blood still in the veins of some inhabitants. Middle English is the result of the Norman Conquest, and was spoken by the now native English people, intermixed with the French. The assimilation of the French language of that already spoken on the Island made for great changes. The lexicon of Old English differed somewhat from Middle English, most of which is completely lost today. There are some words that still have reflexives present in both Modern and Middle English. Beowulf offered his help to the Danish â€Å"cyning†, Old English for â€Å"king†. Chaucer lays mention of a song in the Miller’s tale, â€Å"the Kinges Note† (108). The word is similar but certainly not the same. Beowulf eats â€Å"hlaf†, Old English for â€Å"bread†, while Nicholas, Alisoun, and John eat â€Å"breed†(520) in the Miller’s Tale. Until Grendel came, Hrothgar lived in â€Å"gï â€ lsan†, or luxury, before the appearance of Grendel, who â€Å"amyrrede†, or squandered, his men. The languages differ structurally as well. Old English was a highly inflectional, synthetic language. Grammar was founded on cases, leaving a rather liberal syntactical structure. Middle English, however, was a lesser inflectional, analytic language, which relied on grammar in the syntax itself.