The New Hydraulic System Engineering Essay

The New Hydraulic System Engineering Essay The major aim of the project is to investigate about the new hydraulic system of a380 and the reasons for increasing the hydraulic pressure from 3,000 psi to 5, 000 psi. The project is also intended at discussing and investigating about the new electro- hydrostatic actuators which uses this high hydraulic pressure. This report emphasiss on how this hydraulic system with 5,000 psi works and how it is better than previous hydraulic system. Saving Weight is the major reason for using 5000 psi hydraulic system in a380. By using higher pressure and smaller volume of fluid though the pipe of smaller radius, saves tonne of weight throughout the aircraft. Earlier used in military aircraft, this 5000 psi hydraulic system helps to reduce overall weight of the aircraft by reducing size of pipelines and other components. Fig.1 Kevlar hydraulic hoses, used for carrying high hydraulic pressure in A380. (eaton, 2006) Architecture of a380 hydraulic system differs extremely from other aircrafts, it uses pipeline specifically made of titanium and eight de- clutchable hydraulic pumps being used to achieve this high pressure of 350 bars. Also hydraulic power packs serve as backup for primary systems, instead of secondary hydraulic system which reduces maintenance and save weight. The very obvious reason that come to mind for using an enormous 5000 pounds per square inch seems to be the fact that there is need of massive power needed to fly the giant A380. But there is a lot more to it. The technical reason for that is the weight saving that the designers envisaged. In conjunction to the principles of physics, the pipelines of the hydraulic system have been designed to a smaller diameter as opposed to those used in other wide bodied aircraft, like B 777 in close enough range of A 380. As we know Force = A * P Where A is the cross section area and P is the pressure exerted by the hydraulic fluid Smaller diameter of pipelines enables greater hydraulic pressure to be exerted. Thus apart from giving enough power to drive the controls, it also provides the adequacy for lightweight components though they needed to be stronger. So this reduces overall weight of the aircraft. The way A380s hydraulic system is designed is completely different from those of others. The fact that its piping system is specifically made of titanium. Eight hydraulic pumps that are clutch able add to the extraordinary feature of this beautiful machine. Also, power packs that are driven hydraulically provide back up for the main hydraulic system. His eliminates the need for a secondary system that is normally implemented for redundancy. Here we see an intelligent application of a really appreciable weight reducing technique. This not only saves weight of the aircraft, but also takes a leap across in the world of engineering, in aircraft manufacturing and provides a base for producing aircrafts with such excellent duplicity in designing power store for possibly bigger aircrafts. Assuming the A 380 was made with the conventional 3000 psi, it is logical to say that the overall size of the now a380 would have been much bigger. As the experts say, an A380 with a working pressure of 3000 psi would have a nominal diameter of more than 3 inches as opposed to nearly 2 inches which is the actual. The reason as discussed before is the bigger size of the hydraulic components and the pipelines. This in turn would have demanded bigger housings and heavier mountings for a robust structure. Moreover the fittings that join these components would obviously be proportionally bigger and thus adding to weight of the aircraft. All this idea of weight saving methods has been targeted to the profits that the air carriers would yield in the long run. It translates to having bigger payload capacity that generates more revenue for the business involved. The hydraulic pump is located on the engine gearbox that runs on the mechanical power provided by the engine and turns it into hydraulic power. This hydraulic force of the fluid is exerted to the flight control surfaces like the rudders, ailerons, flaps, elevators. Transformation of the hydraulic energy into mechanical energy is felicitated by electro hydraulic actuators, which is another key feature in the making of A 380. These electro hydraulic actuators are driven through electrical power available from the aircraft generator or the TRUs (transformer rectifier units). They have got electro hydraulic static valves. Figures reveal the advantageous design better. As we know from the mathematical relation, Power = C * P Where C is the volumetric flow rate and P is the pressure exerted. A constant power output would imply change in either of the quantities, i.e. force or pressure. Therefore an increase in pressure would lead to reduction in the rate of flow of the fluid, which is about 40% in A380s case. Consequently, the flow rate in the 5000 psi system is about 42 gallons per minute which in a hypothetical 3000 psi system would have been 70 gallons per minute. So clearly we see a remarkable difference in the amount of fluid flowing per unit time in this instance. But considering the size of A380, this would not have been feasible like it is in case of other aircraft, or even for that matter the jumbo jet B747. Airbus successfully achieved an appreciable 20% reduction in the weight by switching to more pressure and lower flow rate that very well suited to a system that involve figures about masses and quantities, precisely 2500 pounds of weight. But, the only drawback for using this 5000 psi is that the components are not available easily. Invention of hydraulic power generation system Apart from the aviation industry, there are not many  industries  that put emphasis on ways of weight reduction. In an industry of commercial aviation,where  the sole source of profits are the flying machines. To make that happen effectively efficiently and economically, there is constant research and development going on throughout the world to develop new technologies and devise new methods of advancement in the field. Every ounce of weight of the mass of the aircraft  would  imply an extra amount of fuel to be consumed. Thus in an effort to reduce the weight and amplify the power to mass em and ultimately increase profits, Airbus endeavoured to save weight of A380.   A hydraulic system with an operating pressure of nearly 5000 psi is not the latest trend though. Since 1970s, military  aircraft  of sophisticated kind have been using such a mean pressure, but with the advent of the giant beauty, it is the first time that such high a pressure has  been  used in passenger aircraft, against the  conventional  3000 psi hydraulic systems, obviously with the exception of Concorde which featured a 4000 psi system. Components that are used in such military air machines need to be light weight as well as strong enough to handle such fluid  conditions. Similar requirements were demanded by the  design  of A380.   When the bright idea of building the worlds largest commercial carrier  was still on paper, Airbus did know that weight and volume of the structural parts and components involved would be the most critical factor in practical. Engineers and designers pondered upon the expertise that would go into it and discussed the latest hydraulic system technologies. These co-ordinated efforts led to a plateau phase that lasted four months, in which the criteria and the specifications of the components and materials involved were developed. The outcome was that the trade of fuel distribution  system  and the hydraulic power generation system was ultimately given to Eaton Corporation.   A380 HYDRAULIC SYSTEM BLOCK DIAGRAM As compared to other airbus hydraulic system, this A380 got only two hydraulic systems i.e. green and yellow, replacing the third hydraulic system by electro- hydraulic system which comprises of EHA and EBHA. fig.2 block diagram (eaton, 2006) A380 HYDRAULIC AND ELECTRIC POWER SOURCES fig.3 hydraulic sources (tron, 2007) electro hydrostatic actuators fig.4 electro hydrostatic actuators (tron, 2007) EHAs are electrically operated actuators, which replaces the third hydraulic system in an aircraft, thus it simplifies the aircraft architecture and makes it more reliable. It has an advantage of storing the pressure internally, when there is no movement in the motor, thus it reduces the power usage. WORKING AND CONSTRUCTION OF THE SYSTEM   It is the first time in the civil aviation history that flight actuators are incorporated that are powered solely by electricity that give back up to the  hydraulic  powered flight control actuators. When required they augment the primary  actuator. They contain their own hydraulic  and electrical supplies.   For aileron and elevator  movement  EHAs or Electro- hydrostatic actuators are used. For rudder and spoilers movement they are used as EBHAs Electrical back up hydrostatic actuators.   As the pressure has increase from 210 bar (3000 psi) to 350 bar (5000 psi), this has led to thinner pipelines being used. The conventional metal to metal fittings have been replaced by isomeric sealing which bind the metal chemically. Tests have proved that such high pressure would not degrade any chemical or physical property of the fluid, with an added advantage of saving about a metric ton! Hydraulic system of A3809 consists of eight Vickers PV-300-31 hydraulic pumps that are engine driven and are of variable displacement type that have a displacement that deliver at a  rate of 42 gallons per minute at 3775 revolutions per minute. Their displacement is  47 ml per revolution There are two unique features that set this kind of pump apart from traditional type of hydraulic pumps. Firstly, the disengagement clutch that is not found on any of the other commercial or military aircraft. For instance, if any of the eight pumps is not working, it can be de clutched or separated from the system. Then the pump cannot be engaged, with the exception on ground that too by manual means. The second important characteristic of this kind of pump is pressure pulsation. Generally, there are pressure fluctuations n a pump, typically about 10%.] I.e. The value of the pressures generated can vary to about 10% above and below of the nominated value. Even in recent models, this pulsation is about 5%. But Airbus wanted the value to be as low as 1%. These results were immaculate. It led to a system which had variations to a maximum of 4900 psi and 5100 psi on both sides. Low noise levels were an added advantage.   Another important Development with the upcoming of A380 is that they have incorporated four 150 kVa electrical generators which can be frequency controlled. Thus eliminating the use of constant speed drives (CSDs) and better reliability.  Embedded in the same electrical system are the new aluminium power cables that have replaced copper. Thus saving on weight for an aircraft that requires numerous cables running in it for such complex systems.  This power system of the A380 is fully digital and computerised. So the contractors and the breakers have been replaced by solid state devices for better performance. Extending discussion about the electrical power system of A380, it would be logical to mention the illumination system. The lighting is provided by the LEDs which have replaced conventional bulbs. These multi spectral LEDs are capable of producing day like effects anytime and producing shades of variable candela and contrast.   Fig5 components operating the hydraulic system (eaton, 2006) GROUND SERVICE PANEL: According to the fig.2, ground service panel is located at the foremost part of the aircraft in the hydraulic bay and is used for monitoring and maintaining the hydraulic system. Basically it consists of pressure and level gauges, to keep a check over the fluid levels and air pressurization. Fig.6 ground service panel (eaton, 2006) ENGINE DRIVEN PUMP: The main source of supplying 5000 psi is EDP, there are total eight Vickers branded engine driven pumps being installed on the airbus a380 and each being powered by the gear box, supplying the rate of flow of 160 l/min (42 gpm) at 3775 rpm.These pumps are based on clutch mechanism which enables them to disconnect from the engine gear box as required on flight or on ground. Fig.7 engine driven pump (EDP) (eaton, 2006) FIRE SHUT OFF VALVE: Four fire shut off valves being fitted in A380, in order to shut the hydraulic lines in case of major incidents or engine failure. The unit consist of an electrical motor, which has been designed specially for low electrical consumption, saving notable weight of the aircraft cables. Fig.8 fire shut off valve (eaton, 2006) SLAT DRIVE SYSTEM: This system consists of a hydraulic motor, sensors and brake release mechanism, where motor is bi- directional with variable displacement in nature and sensors are based on closed loop motor control mechanism. it is the first commercial aircraft, which uses this variable displacement motors to operate the secondary flight controls. Fig.9 hydraulic motor (eaton, 2006) HIGH PRESSURE MAINTENANCE FREE ACCUMULATOR: These accumulators are mostly used for maintaining the brake system of the jumbo jet during parking mode and also used as backup for emergency braking. They are charged with helium and can only operate with high pressure hydraulic fluid i.e. 5000 psi. Fig.10 high pressure accumulator (eaton, 2006) HYDRAULIC SLIDING UNIONS: These sliding unions are used for distribution of hydraulic power to different sections of aircraft such as rudder, elevators, landing gear etc. They are used for supporting pipe length during contraction and expansion, due to thermal changes and significant wing deflection. As shown in fig.2, they are located at rear spar area of the wings. Fig.11 hydraulic sliding unions (eaton, 2006) Highlights of new hydraulic system C:Usersswatinw sngsPictures380 10.jpg Fig.12 highlights of new system (bugatti) Electro hydrostatic actuators (EHAs)   These are for back up flight controls and are driven by mini pumps which are smaller that conventional pumps  but capable of delivering fluid at 5000 psi. Massive size of a380, brings out a new approach to its flight control system, moving these large surfaces hydraulically being proposed but later replaced by the new hydraulic plus electric architecture known as electro hydrostatic actuators. http://www.messier-bugatti.com/IMG/jpg/hmp0033n.jpg fig.13 mini pumps (bugatti) Hydraulic filtration and distribution   Its components are made of titanium so it can bear high pressures, being stronger and lighter in weight at the same time. Steering system To impart great manoeuvrability to the aircraft, Messier Buggati developed variable architectures to enhance the same. for example,   the nose wheel was managed by a software  Ã‚  IMA ( Integrated Modular Avionics) and a backup circuit of the type LEHGS (local electric hydraulic generation system) to support the main circuit for the nose wheel. The two rear wheels on each of the two central bogies are controlled by RDC (remote data concentrators) along with IMA. http://www.messier-bugatti.com/IMG/jpg/hs0013nblocorient_ra_a380-230-2.jpg fig.14 A380 steering system (bugatti) An application of the same is WABSIC  that  stands for  wheel and braking system integrated components  , it has two functions.one is to ensure the rotational speed of the tyre, other is to monitor the tire pressure through wireless data transmission. Moreover a brake cooling fan is part of this integrated unit. The same manufacturer Messier Buggati is responsible for the brake temperature monitoring system and oleo pressure monitoring system on the A380   Braking control system This is controlled by two main circuits fed by two hydraulic circuits, both operating at 5000 psi and monitored by the IMA software. The alternate system which uses de centralised  hydraulic system is also a full brake by wire system which is controlled by an analogue computer and has an emergency baking control unit (EBCU). landing gear hydraulic system As everyone knows that the world biggest airliner a380, has gained much of media headlines for building the jumbo jet with the hydraulic pressure of 5000 psi and they uses this pressure for operating their landing gear systems, which was a big challenge to work on. Maximum take-off weight of a380 is 560 tonnes, out of which 20 tonnes is only of gear itself. Landing gear retraction and extension system is the major element, which manages the landing gear of a380 having total of 22 wheels with 5000 psi. LGERS also introduces the new electromechanical uplocks, which are used for locking and the unlocking undercarriage bay doors and landing gears. These up locks can be used in normal mode as well as in emergency mode, but because of its weight they being replaced by the electromechanical actuators which are far more Compaq and cheaper as it eliminates the use of cable riggings which saves weight and cost as well. There are total 12 up locks being installed on a380, which are easy to maintain as it removes the need of bleed hydraulic system.

Sigmund Freud :: Psychoanalysis

Sigmund Freud 1856 - 1939 Sigmund Freud was born in the Austro-Hungarian Empire in 1856, it was in the Czech Republic. His father was a small time merchant, and Freud's mother was his second wife. Freud had two half-brothers some 20 years older than himself. His family moved to Vienna when he was four years old, and though he often claimed he hated the city, he lived there until it was occupied by Germany in 1938. Freud's family background was Jewish, though his father was a freethinker and Freud himself an avowed atheist. Freud was a good student, and very ambitious. Medicine and law were the professions then open to Jewish men, and in 1873 he entered the University of Vienna medical school. He was interested in science above all; the idea of practicing medicine was slightly repugnant to him. He hoped to go into neurophysiological research, but pure research was hard to manage in those days unless you were independently wealthy. Freud was engaged and needed to be able to support a family before he could marry, and so he determined to go into private practice with a specialty in neurology. During his training he befriended Josef Breuer, another physician and physiologist. They often discussed medical cases together and one of Breuer's would have a lasting effect on Freud. Known as Anna O., this patient was a young woman suffering from what was then called hysteria. She had temporary paralysis, could not speak her native German but could speak French and English, couldn't drink water even when thirsty, and so on. Breuer discovered that if he hypnotized her, she would talk of things she did not remember in the conscious state, and afterwards her symptoms were relieved -- thus it was called "the talking cure." Freud went to Paris for further study under Jean-Martin Charcot, a neurologist known all over Europe for his studies of hysterics and use of hypnosis. In 1886, Freud returned to Vienna, opened a private practice specializing in nervous and brain disorders, and married. He tried hypnotism with his hysteric and neurotic patients, but gradually discarded the practice. He found he could get patients to talk just by putting them in a relaxing position (the couch) and encouraging them to say whatever came into their heads (free association). He could then analyze what they had remembered or expressed and determine what traumatic events in their past had caused their current suffering.

Alcohol and Drinking - America Must Lower the Drinking Age :: Argumentative Persuasive Topics

America Must Lower the Drinking Age In other countries around the world if you are under the age of 21 you can drink alcohol some countries don't even have an age limit, but in America you have to be 21 to buy alcohol. You can go to war and die for your country when you are 18, you can also vote, buy cigarettes, but you can't buy alcohol. One of the main causes of the drinking age being set to 21 was teenagers were getting into car accidents after getting drunk. I am not saying driving under the influence should be legal. What I am saying is there should be more government programs to educate and prevent people from driving intoxicated. More and more people under the age of 21 are experiencing alcohol. "A survey released by the Texas Commission on Alcohol and Drug Abuse (TCADA) found that by the time Texas teenagers are seniors in high school, more than 80% of the teens admit to having some experience with alcohol. The same study found that secondary students say it's easy to get beer, wine or liquor." (qtd. in Westbrook) Texas is a zero tolerance state for underage drinking it has some of the strictest penalties for underage drinking, and if 80% of the teenagers in Texas have had experiences with alcohol that tells me that the campaigns against underage drinking, and zero tolerance programs are not working. Teens are going to drink alcohol at one point of their lives. So instead of spending all this money to prevent teens from drinking maybe it should go toward programs, or educating these teens about alcohol so they can make a informed decision about drinking. There are programs now that educate people under the age of 21 about alcohol. These programs are being implemented in colleges around the country, and are about the choices of using alcohol. "At the University of Virginia they are taking a more of an old-fashioned approach to educating college students about alcohol use. They are using two, two-and-a-half hour courses in class rooms called "Choices". They are boasting high results from this program a total of 75 percent of participants said they planned to reduce how much they drink in the future, while 85 percent indicated they had spoken to a friend." (Altamirano). If these programs have high success rates, I think these programs should be put in high schools as well.

Do Child’s Shoe Size Increase with Age

Do Children’s shoe size increase in age? IntroductionI teased apart from my evidence relevant data collected three important bits of information being, age, shoe size and gender I then gathered the data and evaluated the information after converting it into tables, graphs and charts. I gathered data from various ages, with various shoe size. Using evidence to understand and conclude which hypothesis is the most accurate. I understood the frame work of my report and from prior knowledge I already had a thesis of my own. Using mind mapping I created Ideas for obtaining relevant data. AimThe aim of my investigation is to have obtained enough relevant data to confirm the most accurate hypothesis and reinforce my argument. The evidence needs to be clear and precise and specific points summarised. Hypothesis and Null HypothesisHypothesis- Do children’s shoe size increase with age? Null hypothesis- As children get older their shoe size do not get bigger. MethodI devised a simple short questionnaire to obtain three important parts of information, gender, shoe size and age. All participants were sixteen or under I received consent from themselves or their parents and explained the reasons for my research. I then transferred the data into a tally chart and calculated how many participants have what size shoe. I then displayed the data into a barchart, pie chart and a scatter graph. I used various ways of working out the averages. Participants ages ranged from ten years of age to sixteen years of age, their shoe size ranged from a children’s size thirteen to a size seven. MethodTo obtain my evidence I devised a questionnaire and explained to participants if I could ask them three short questions to complete my report. The selected questions I chose I felt would be enough to put a report together, to observe a trend and to confirm statistics. Participants I asked thirty participants ranging from ten years of age to sixteen years of age, male and female with shoe sizes verying from a childs size thirteen to a size seven. I asked equal amount of female participants to male participants. MaterialsEach participants where asked if they were happy for myself to ask three simple questions reference to their age, gender and shoe size. Younger participants guardians were also asked if they were happy for me to ask their childrens questions from my short questionnaire. All participants I knew personally, they were either friends, relatives or work collegues. Each questionnaire displayed ‘Thank you for completing this short questionnaire’?Do children’s shoe size increase with ag eI disected the data into sections to understand, firstly the average shoe size overall, having relevant information allowed me to devise charts, graphs and tables to evaluate whether shoe size increase with age. DiscussionI feel the range of age could be better as I had no knowledge of the children’s age before the questionnaire was completed by them which altered my results. The results clearly supported the Hypothesis. Some results I would not have predicted for instance a thirteen year old boy with size seven shoe. Certain factors such as gender may have affected my results, some of the participants were teenagers and were probably experiencing growth spurts especially male participants as some results were quite surprising as mentione previously. I asked thirty participants which I felt was enough children to have enough date to devise a report maybe the range of the participants ages may have given me an interested twist to the Hypothesis. If I was to complete my studies again I would probably have a larger range of the participants age, I feel that the equal amount of male and female participants provided a fair report. ConclusionAnalyzing my findings I can see that the overal participants shoe size did increase with age, the Hypothesis seems to be correct. I feel I obtained enough data to understand if the Hypothesis was true or false. I can also analyze the most reliable average is mode. The average shoe size with in the participants age range of ten years to sixteen years is a size three.

Realities of War

Loved and Lost English Literature 108 July 27 2014 War is a patriotic act where one seeks the determination to lead their country. It can be viewed as noble, cruel, inhumane, and can make an individual a hero or a criminal. It affects everyone in a society, hoping loved ones are safe, whether they are the ones fighting in the battlefield or waiting at home. Anthem for Doomed Youth† by Wilfred Owen presents a speaker who criticizes war and illustrates a vivid picture in the readers mind regarding the harsh realities surrounding warfare, including the Allen soldiers and the ones left behind to grieve their losses. Where as W. B. Yeats in Easter 1916 portrays a speaker who conveys an ambiguous attitude in relation to war, they initially seem undecided in their feelings regarding the rebellious revolutionaries who led the uprising, but soon turn to appreciate and appreciate the fallen individuals.Imagery is used to explore and portray complex subject matters; Owen and Yeats illustr ate the harsh realities of war using imagery that incorporates objects seen and used in every day life. All though the speaker's perspectives differ ND they explore warfare from different angles, their use of imagery serves as a powerful tool in emphasizing the positive and negative aspects of war and the side effects on a society.Owen and Yeats both question the necessity of war in â€Å"Anthem for Doomed Youth† and â€Å"Easter 1916† but Owen uses imagery that evokes negative responses to war, whereas Yeats presents an ambiguous perspective through his use of imagery. Owen creates contrary feelings towards the subject of war through his imagery. Contrasting â€Å"Anthem† with â€Å"Doomed Youth† initiates the tone for the rest of the poem, â€Å"Anthem is s youth are typically seen as young children who should be protected and not thrown in harms way, all though in this poem, the use of ‘Doomed' in title creates a completely different meaning.His use of language emphasizes his perspective against the necessity of war by contrasting words such as â€Å"demented choirs† with â€Å"wailing shells† (7) and â€Å"monstrous anger† with â€Å"guns,† (2) all portraying negative images that emphasize on the destructive nature of war, therefore contributing to the speaker's stance against war. In addition, William Kevin Penny states, This quote re-emphasizes that Owens use of detailed imagery was used deliberately so that an audience could effectively grasp the meaningful message he was trying to convey about aspects of war.His contrasting language such as â€Å"anthem† with â€Å"doomed,† and â€Å"monstrous anger† with â€Å"guns† is what makes this message conveyable to an audience. In contrast to Owens poem, Yeats uses imagery to present the speaker's ambiguous perspective, the comparisons made in the lines: Yeats uses the comparisons of death to sleep to reflect the speaker 's ambiguous perspective. Normally sleep is equated with neither, negative or positive emotions, here as death is normally seen in a negative way; yet comparing the two together, reflects the speaker's ambivalent attitude effectively in this poem.Yeats' Contrasting the image of nightfall with death signifies the relationship between the end of day (that happens insignificantly) with the end of a person's life, which normally would be considered significant, yet this reference is suggesting the death resulting from war is unnecessary. The question, â€Å"Was it needless death after all? † reflects the speakers opinion even further, the question mark is inserted to enhance the ambiguity of the beaker, as it implies the speakers uncertain nature.Therefore reflecting the speaker feels the revolutionaries' rebellion is questionable in its nature. Lima Haney agrees with this notion by claiming, â€Å"Easter 1916, Yeats conveys his dismay with the civil unrest and the needless loss of life in his country,† (341) therefore reaffirming that the speaker in this poem questions the necessity of war as it produces fatalities that are unwarranted according to Haney. Yeats is able to represent this stance, using specific language such as ‘needless death,' which also adds to the images that emphasize this notion.Owen and Yeats both use imagery in â€Å"Anthem for Doomed Youth† and â€Å"Easter 1916† to reflect the speaker's perspective on individual's involvement in the war. Owens use of imagery portrays a cynical perspective from a speaker who condemns the actions and stresses the consequences of warfare. Owens speaker stresses soldiers in â€Å"Anthem for Doomed Youth† who have fought in the war and the loved ones who have dealt with losses resulting from war.His use of language creates vivid imagery by comparing the deaths of soldiers to the deaths of cattle. Owen states, â€Å"What passing-bells for these who die as cattle? (Owen 1). This quote reflects the speaker's opinion that soldiers involved in warfare are treated like a herd of animals, and their deaths are no more important than cattle, which are rounded together and killed simultaneously in a slaughterhouse.The line also sets the tone for the rest of the poem through imagery, as soldiers are portrayed in dehumidifying terms, and reflects the negative perspective of the speaker. In contrast to the poetic devices used by Owen, Yeats' use of imagery in â€Å"Easter 1916† describes a speaker who is initially uncertain about the necessity of war, yet recognizes the revolutionaries involved on a heroic level by amortizing them.The speaker, even though ambiguous in their attitude towards war, still feels that the revolutionaries partaking in the rebellion are important enough to â€Å"write it out in a verse,† (Yeats 74) therefore the imagery of a tangible poem recognizes the revolutionaries actions as heroic enough to commemorate them in a p oem that shall be read for eternity, even though the speaker doesn't necessarily agree with the rebellion itself.This notion is further proven when Austin Ride states, † Yeats initially disapproved of the Easter rebels, heir executions won him over to a grudging and ambivalent respect for their accomplishment† (401) similar to my initial statement that through imagery, Yeats uses imagery such as commemorating revolutionaries in a tangible poem to present his speaker's ambiguous perspective on the war, all though he was uncertain in his attitude towards the rebellion, the gesture of the revolutionaries fighting for what they believed in granted them the significance to be viewed as noble and patriotic.Owen and Yeats both use imagery to describe the bloodshed during battles to emphasize the harsh realities of war in â€Å"Anthem for Doomed Youth† and â€Å"Easter 916†. Owen presents imagery that illustrates horrendous warfare conditions that exemplify the con ditions soldiers had to endure. The lines stating, â€Å"Only the monstrous anger of the guns. Only the stuttering rifles' rapid rattle† (Owen, 2-3) refers to the soldier's day-to-day living conditions, which consisted of living in fear with constant chaos from the sounds of gunshots constantly surrounding them, and knowing that at any moment their lives could be over.In comparison to Owen, Yeats also uses imagery to convey the bloodshed during battles to emphasize the harsh ileitis by stating, â€Å"We know their dream; enough / To know they dreamed and are dead,† (Yeats, 70-71) with the use of images of death, and comparing the dreams of the individuals involved in the rebellion to their deaths, illuminates the harsh realities of war; even though they had good intentions, and felt as if they were fighting for a noble cause, their â€Å"dreams† are what finalized their lives; therefore, showcasing the inevitability of warfare.Owen and Yeats' language throughout the poem creates imagery that reflects the effects of warfare and how it not only hurts the individuals involved but the ones who urn from their losses as well. Owens speaker discusses individuals in â€Å"Anthem for Doomed Youth† who have to deal with the loss of loved ones resulting from war. Stating, â€Å"The pallor of girls' brows shall be their pall; / Their flowers the tenderness of silent minds, / And each slow dusk a drawing-down of blinds. † (Owen, 12-14) refers to all the family and friends who have to deal with the horrible losses resulting from war.The â€Å"pallor of girls† signifies the paleness of women from shock and sadness, and ‘tenderness of silent minds† is referring to the silent mourning of family embers and/or friends. The phrase, â€Å"drawing-down of blinds† is also referring to the grieving of loved ones. The use of this everyday object is typically used to represent the end of day, or to be left alone. People use b linds to keep things out, such as sun, or to represent nobody is home or they do not want to be bothered.

Brainstorming Six Thinking Hats Communications Essay

Brainstorming Six Thinking Hats Communications Essay Brainstorming is one of the best-known techniques for producing fresh ideas and approaching problems from innovative new angles. Brainstorming sessions are best done in small groups; participants are asked to leave their inner critic at the door and come up with the zaniest ideas possible. This challenge is based on a tool created by famous ‘lateral thinker’ Edward de Bono to improve decision making skills. The Six Thinking Hats technique is particularly useful for group brainstorming as it emphasises ‘what if?’ thinking rather than ‘what is’ assumptions. People or groups often tend to follow certain fixed ways of thinking. This technique involves looking at a problem or issue from a number of different perspectives, each represented by a different coloured hat, and giving each one equal weighting in a discussion. White hat (= objective) When you wear this hat, you focus on available information to see what you can learn from it. You try to fill any gaps in your knowledge. This is where you analyse past trends and extrapolate from historical data. Red hat (= emotions, feelings) When you wear the red hat you use intuition, gut reaction and emotion to respond to an issue or idea. You also try to think how other people will react emotionally to the issue, and try to understand their intuitive responses. Black hat (= negatives, points of caution) When you wear the black hat you are the pessimist. You are cautious and critical and try to find reasons that things will not work. It’s a useful perspective, since it highlights any weak points in a plan and enables you to either eliminate them, or prepare measures to counter problems should they arise. Black hat thinking makes plans more resilient. Yellow hat (= positive focus) The yellow hat is the positive thinking hat. When you wear this hat you seek harmony; its optimistic viewpoint enables you to see the value, benefits and further opportunities in a plan. Yellow ha t thinking helps you keep going when everything looks gloomy and difficult. Green hat (= generates new ideas or concepts) The green hat stands for creativity. Its mood is provocative, experimental, and explorative. Wear it to playfully spin ideas free of any judgement or criticism. Blue hat (= defines focus, control of thinking) The blue hat stands for process control. It sees the big picture. Wear this hat to chair a meeting, or to bring any of the other processes /thinking approaches [?] to order. During a typical Six Hats session you will flip between different hat ‘modes’: when ideas are slow in coming you’ll try green hat thinking; when the mood gets too pessimistic, switch to yellow hat thinking; when contingency planning is needed, put on your black hat, and so on. 3 How to Play 3.a Game Instructions The six animals on the right-hand riverbank are desperately looking for their thinking caps, which the wind has cheekily deposited on the left bank. Send the hats back to their respective owners by following the 6 ways of thinking, one at a time, all the way through from the left to the right.

Changing Context of Workforce Planning and Labour Market Change Research Paper

Changing Context of Workforce Planning and Labour Market Change - Research Paper Example The report indicates that the LFS essentially tracks two different types of teleworkers, including those working in their premises and those working in particular places like on the train, at their client’s homes, or in the cars. However, all the two types of teleworking services use the home comfort as their primary setups. In 2005, the majority of teleworkers worked in several places but used the home as their center. The number represents a whopping 1.8 million out of a total 2.4 million. These figures just demonstrate how the labor market is vigorously shifting from the more demanding contractual basis to the less critical self-employment context. There are several factors central to the sudden change in the labor market context. The first primary aspect is the advancement in technology. The new skills and equipment have revolutionized and redefined the entire workforce because it has brought a range of capabilities that were initially far-fetched. For example, in the case study, the rise of computers and telephones has changed the game because it has made work easier for builders. They can efficiently execute particular duties at home and at the same time communicate with clients. This scenario contrasts the traditional white-collar-job setup that requires an employee to link remotely with the employer. Apart from technology, several other reasons perhaps drive employees away from the customary right jobs, hence making home based work more appealing and convenient. First, some contracts are not guaranteed.