Insurgent Movements During and Immediately After WW2 Essay

Insurgent Movements During and Immediately After WW2 - Essay Example The further occupation of France, as well as austerity measures of Nazis and Vichy regime increased the will to fight. Part of the population had no choice apart from joining the Resistance (Jews or people forced to work in Germany) (Crowdy, 2007). Part of Resistance groups were communist and antifascists. Another part of the Resistance fought for the liberation of France and establishing the new country. It should be also mentioned that significant part of Frenchmen was depressed by the defeat in 1940, did not want to fight or preferred to accept the existing situation. So-called passive resistance also existed (Folker, 2012). The Resistance was a movement of people with different principles and motivations. The Resistance included various forms of struggle. It may be described as a combination of movements and networks (Folker, 2012). Movements were mostly aimed on the fight against the Nazism ideology. They grouped around newspapers and spread the ideas of the Resistance. The production of the publications was another form of resistance. Networks were structures that are more active. They gathered information about military activity, organized sabotage actions and armed resistance. Sabotage and espionage were the main forms of fight. The armed fight was the less frequent form of resistance. Non-obedience to the Nazis legislation or hiding Jews are also treated as a form of fight. Part of people treat themselves as resistants for ‘at least doing something’. About 500,000 people were involved in the Resistance and about 100,000 people participating in this movement were killed. The results of maquis’ military was not so serious (about 9,000 executions). The most impo rtant result of the Resistance activities was the information gathered before the Normandy invasion (Cobb, 2009). The activity of the Resistance media was one of the

Data Communications Bluetooth Essay Example | Topics and Well Written Essays - 1000 words

Data Communications Bluetooth - Essay Example Therefore, the low transmission rate has always been a serious issue in wireless technologies and especially in case of Bluetooth it has posed serious concerns for communication scientists. However, the advancements in the areas of signal quality and strength, compression algorithms and wireless technologies have resulted in faster communications and popularity of wireless communications generally and Bluetooth technology in particular. Symmetric vs. Asymmetric & Speed There are basically two types of digital communication in Bluetooth technology; asymmetric and symmetric. In asymmetric communication, only one device transmits at a given time, whilst in symmetric communication both Bluetooth devices are transmitting information simultaneously. The technology offers different bit rates for both types of transmission. In asymmetric communication the bit rate is slightly more than 2178.1 kb/s using the Bluetooth standard 2.0, which was introduced in 2004. Symmetric communication reduces this rate to approximately 1306.9 kb/s (Huang & Larry, 2007). However, these transmission rates are not available in practical scenarios where wireless communication is affected by the distance and obstruction between communicating devices, noise in the environment, protocols being used and many other factors. The Bluetooth 2.0 Standard Bluetooth technology has considerably advanced since the introduction of 2.0 standards in 2004. Now, it is a much more reliable and robust wireless technology. â€Å"Bluetooth uses a standard 2.4 GHz frequency so that all Bluetooth-enabled devices will be compatible with each other. The only drawback of Bluetooth is that, because of its high frequency, its range is limited to 30 feet.† (Techterms,... Historically, â€Å"The word "Bluetooth" is taken from the 10th century Danish King Harald Bluetooth.† The exploratory work on Bluetooth technology was initiated by mobile phone company Ericsson in 1994. Owing to its ease of use, security, availability and affordability Bluetooth technology has gained rapid fame among hardware manufacturers and the masses. The technology has now become almost a default feature in all hardware devices that supports digital communications, like laptops, PDAs, mobile phones, computer networks, etc. The major benefits offered by Bluetooth technology include: short range radio wave, inexpensiveness, availability, ease of use and configuration, high speed, multiple communication channels and security mechanisms. Sobh observes, â€Å"Bluetooth is a low cost and short range, and low power radio technology.† These benefits make the technology attractive for both personal and commercial uses, like direct and personal marketing and advertising in an area with high footfall or shopping plaza. Amor declares: â€Å"Future aspirations for Bluetooth are unstoppable because of the acceptance it has received from many big companies.† Bluetooth offers easy bridging among multiple hardware technologies and can offer quality solutions for a high-tech, fast moving world.

The Common Agricultural Policy Essay Example | Topics and Well Written Essays - 2000 words

The Common Agricultural Policy - Essay Example Thus (at least) from the perspective of the Treaty on European Union, (and its predecessor Treaties) funding for agriculture should be a medium for reducing or eradicating regional disparities within the European Union. Funding for agriculture within the Union has historically been dispensed under the Common Agricultural Policy. The Common Agricultural Policy came into being in 1962 after the ratification of the Treaty of Rome in 1957 and the resultant establishment of the Common Market. The establishment of the Common Market came with Treaty requirements that guaranteed the free movement of goods (among other freedoms like the free movement of services, persons, and capital). The member states of the then European Economic Community - France, Germany, Italy, Belgium, the Netherlands, and Luxemburg - all had different agricultural policies that had some state intervention in the sector. France was however notable for its very strong state intervention in its agricultural sector and insisted on the maintenance of subsidies for the agricultural sector as a condition for the establishment of the Common Market. (BBC Q&A, 2005) Thus the issue of free trade guarantees in the Treaty of Rome and the barriers to trade in agricultural products that individual state intervention through subsidies in the agricultural sector would bring was evident. ... olicy thus presented a compromise through which a harmonisation of state intervention on a common basis could be maintained within the free trade guarantees of the Treaty of Rome and for the functioning of the Common Market. The establishment of the Common Agricultural Policy had the following objectives - to increase productivity to ensure fair living standards for the agricultural community, to stabilise markets, to ensure availability of food, and to provide food at reasonable prices. (Article 39 of the Treaty of Rome) In practice, the Common Agricultural Policy is a programme of financial subsidy paid to farmers and a trade policy that sets tariff and quota restrictions on the import of agricultural products from outside the European Union's Common Market. (El-Agraa, 2007) The financial subsidy under Common Agricultural Policy offers a guaranteed minimum price payable to producers of agricultural products, though the actual implementation and maintenance of the subsidy programme varies from different member states in the European Union. The Common Agricultural Policy has undergone changes over time to meet with policy, structural and domestic and international demands for reform among others. Currently, the 'decoupling' scheme is one of the central reform tools being used by the European Union detach production subsidies. (Jeffery, 2003) Payment of subsidies is no longer tied to the volume of production of agricultural produce. The single payment scheme is one of the policies that have been adopted to 'decouple' subsidies from production. (El-Agraa, 2007; Anderson and Josling, 2007) The maintenance of subsidies with production had resulted in a system where farmers produced for subsidies and not necessarily for the market. This resulted in an over production of

Differences between primary and secondary research Paper

Differences between primary and secondary - Research Paper Example â€Å"These original documents (i.e., they are not about another document or account) are often diaries, letters, memoirs, journals, speeches, manuscripts, interviews and other such unpublished works† (University of California Santa Cruz, 2011). The primary source is original and encapsulates a lot of creativity. The information is factual rather than interpretive. Primary references report the scientific discoveries in detail. In scientific studies, they not only narrate the conclusions, but also sufficiently discuss the clinical trials as well as the experiments that make part of the research. The discussion is completely factual. Secondary research upon humanities encapsulates analysis and interpretation of the primary sources. The event discussed happens in the past and only a second-hand account of the same is generated. Creative works are interpreted in the secondary research. In the secondary research, research outcomes and scientific discoveries are analyzed and interp reted. Primary sources consume more time in retrieving than the secondary sources. This is because of the fact that to retrieve information from the primary sources, the researcher needs to approach the respondent. The first and the foremost obstacle in way of retrieving information from a primary source is that the researcher needs to take an appointment from the respondent. ... It is for the researcher to decide whether the interview has to be structured, semi-structured or non-structured. Once everything is ready, the researcher still might encounter inconvenience collecting the data as the respondent might not feel comfortable discussing certain issues that are of prime interest to the researcher. Therefore, most researchers refer to the primary data only when there is insufficient information in the secondary sources (Duval, 2005). Nevertheless, because of the researcher’s use of â€Å"telephone surveys, computerized data analysis, and use of cell phones and pagers† (Benfield and Szlemko, 2006, p. 2), primary data is not as difficult to collect in the present age as it used to be in the past. On the other hand, secondary sources are very easy to retrieve the information from. All the researcher needs is access to the required material. â€Å"Marketing researchers use secondary information because it can be obtained at a fraction of the cos t, time, and inconvenience of primary data collection† (McDaniel and Gates, 1998, p. 75). Examples of the primary sources about humanities are letters, diaries and journals. Data is retrieved from magazines and newspapers. Photographs, government records, one-to-one interviews with the concerned parties and paintings are all included in the primary resources. Sources conventionally used for the scientific research include but are not limited to the published results of experiments, conferences and clinical trials. Examples of the secondary sources include histories, biographies, books, newspaper articles and scientific journals (Thomas, 2010). Nielsen

The Spread of the Renaissance Essay Example for Free

The Spread of the Renaissance Essay What do Da Vinci, Petrarch, Alberti, Erasmus and Shakespeare have in common? More than just being from Europe, these great men of arts and literature all flourished during the Medieval Ages. They are all product of the renaissance period and greatly enriched the development of philosophy and humanism during this period right after the Dark Ages. Renaissance, which literally means â€Å"rebirth† in French, was a cultural movement in Europe. This era took place mainly in Italy then later spread throughout Europe from 14th to 17th centuries. Generally, it was characterized by the revival of learning based on classical sources in the fields of philosophy, religion, politics, literature, arts and science. The primary subject of renaissance was humanism. People believed in the active search for knowledge instead of accepting what already existed (â€Å"Renaissance†, 2007). It was the time when the ancient Greek and Roman literature were rediscovered and relearned. The recovery was headed by Giovanni Boccaccio and Francesco Petrarch. Instead of writing in Latin, which was the lingua franca of the church and the elite during that era, these writers wrote in Italian. This paved the way for other writers succeeding them to follow their beginning. These writers wrote epic poems all in Italian. In Italy, the spread of public knowledge in religious and secular understanding was due to the establishments of public libraries and translation of classical Latin works into vernaculars. One significant work was that of Niccolo Machiavelli, The Prince, which gave light to a study of modern politics. The spread of Renaissance in other parts of Europe came in the mid-15th to 16th century. It was exported to France by King Charles the VIII after he invaded Italy. The exportation included Italian artists like Leonardo Da Vinci, Francois Rebelais, Pierre de Ronsard and Michael de Mantaigne. Da Vinci, on one hand, has built for France spectacular palaces. He was renowned for his great works like Mona Lisa and the Last Supper, two artistic renditions that has transpired through ages. He had become one of the famous icons of the Renaissance. The wave also reached Poland, Hungary, Portugal, Spain and Germany though the centers of this movement came to be France and England. In England, more than simply the expansion of the arts, Renaissance also impacted the religious practices and beliefs. The period is closely related to the Protestant Reformation that divided the powerful Roman Catholic Church. The reformation led by Martin Luther brought forth the creation of other religious movements — Calvinism, Presbyterianism, Anabaptism and Anglicanism. On the other hand, writers like William Shakespeare, Christopher Marlowe, John Milton and Edmund Spencer gave life the English literature. Shakespeare has already become the greatest embodiment of classical English literature. The Renaissance Age truly gave birth to new understanding of previously acclaimed knowledge of the arts. Furthermore, it has paved a way for more knowledge and ideas to flourish. Not only that the Italians are the masters that provided inspiration (â€Å"Defining the Renaissance†, 2007) but it had come to give justice to the arts of other countries. Though it was mainly focused in Europe, the effect, impact and influence of the era has traversed many continents, races and generations. The movements, products, inventions and ideologies that were created during that era are still regarded until this present to be the exemplary and catalyst for the current movements. The Modern era has been greatly influenced by this period of history. References: Renaissance. (2007). Research Machines. Retrieved September 17, 2007 from http://www.tiscali.co.uk/reference/encyclopaedia/hutchinson/m0011726.html Defining the Renaissance (2007). Looking at the Renaissance. Retrieved September 17, 2007 from http://www.open.ac.uk/Arts/renaissance2/defining.htm

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.

Effect of Music on the Level of Happiness

Effect of Music on the Level of Happiness ABSTRACT The present study was designed to investigate the role of music in increasing the level of happiness of college students. The convenient sample comprised of 120 (sixty men and 60 women) undergraduate students from G.C University, Lahore. Their age range was 17 23 years (M = 20.38, SE =0.11). This study used a 2(Gender) X 3(Music) X 2(Phase X S) mixed factorial design, with gender and type of music as between-subject factors and phase as repeated measures factor. Type of music had three levels, viz., classical, popular and mystical and phase was divided into pre- and posttest measures. After taking informed consent, participants were randomly assigned to the three conditions. Each participant was assigned a computer and was provided with a set of headphones through which they heard the specific kind of music. The Depression Happiness Scale (Joseph and Louis, 1993) scale was administered once before and then after the participants listened to the music. The results of (2 X 3 X 2) mixe d factorial Analysis of Variance and post-hoc Tukey tests revealed that popular music had significantly increased the level of happiness of college students, unlike classical and mystical music. No gender differences were found. CHAPTER 1 INTRODUCTION This thesis examines the enhancing effects of music on happiness. Music is the purest form of art. It can be said that it has an impact on almost everyone. Certain pieces of music have a relaxing effect, while others stimulate us to act, and some cause change in or emphasize our mood. This work specifically investigates if listening to different kinds of music can increase the level of happiness or not. 1.1 Defining Music The word music basically comes from the Greek word mousike meaning art of the muses. Technically, all sounds are the result of atmospheric vibrations; however, unlike mere sounds and noises, music consists of a set of sounds with particular frequencies, amplitudes, and timbres which are organized into highly predictable patterns. The Social and Cultural meanings by people turn these sounds into music (Smith, 1989). Culture and social context is very important while defining some construct (Matsumoto Juang, 2008). Thus, the definition of music varies according to culture and social context. The artists may view music as a performing art, a fine art, and an auditory art. According to J. P. F. Richter, Music is the poetry of the air.William Shakespeare called music the food of love, (Galwitz, 2001). Humanistic psychologists view music as a means of self fulfillment, integration and self actualization. For existentialists it is another department of choice and freedom. Music in any form has a universal appeal, like an international language, it is understood and spoken everywhere, and its charm and penetrating power cannot be denied (Malik, 1983). Components of Music Music consists of particular frequencies, amplitudes, and timbres etc which are organized into patterns. (North, Hargreaves Hargreaves, 2004).The components of music are, Musical note is a single sound of definite pitch and duration which can be identified in writing. Rhythm, is the arrangement of sounds in time, this arrangement is a complex arrangement of notes into a mixture of short and long durations within a single bar or a series of bars. Regular pulse groupings are called bars or measures. Rhythm is one of the most central features of many styles of music, especially jazz and hip-hop (Lerdahl Jackendoff, 1983). A Scale is a progression of notes in an ascending or descending order. Melody or tune assembles a series of notes into recognizable musical shapes. The notes of a melody are created with respect to pitch systems such as scales. A melody usually though not necessarily possesses rhythm. The rhythm of a melody is often based on the tones of language, the physical rhythms of dance or just periodic beatings (Narveson, 1984). The beat of a piece of music is its regular pulse, determined by the bar lines by which music are metrically determined. Pitch, is the height or depth of a note in relation to other notes or in relation to an absolute pitch. The absolute pitch has internationally been set at A=400 Hz that is, the A above the middle c has a frequency of 440 cycles or vibrations per second. Pitch is determined by the sounds frequency of vibration. The process of assigning note names to pitches is called tuning. The difference in frequency between two pitches is called an interval. The interval indicates either the doubling or halving of the base frequency (Machlis Kristine, 2007). Harmony is the study of vertical sonorities in music. A vertical sonority refers to considering the relationship between pitches that are together. Harmony can also be implied by melodies that outline a harmonic structure. Larger structures involving multiple pitches are called a chord (Darmschroder Williams, 1990). Harmony in music can be analyzed through Roman numeral system. A system of chord symbols is used in popular and jazz music (Friberg, 1991). Musical texture is the overall sound of a piece of music .It is described as the number of parts or lines and their relationship. The perceived texture of a musical piece can be affected by the interval between each musical line, the timbre of instruments or the number of instruments used. Monophony, homophony and polyphone include musical textures. Monophony is the texture of a melody. The texture of homophony is achieved when a melody is accompanied by chords. The melody in homophony is usually voiced in high notes. Polyphony consists of several simultaneous melodies of equal importance (Temperly, 2001). Form, is a feature of musical theory that explores the concept of musical syntax, on a local and global level. The syntax is often explained in terms of phrases and periods or sections or genre respectively (Juslin Laukka, 2004). 1.1.2 Types of Music Different types of music help in soothing ones disturbed soul and cheer us up. There are various types of music i.e., classical music, rock, hip-hop, folk, opera, mystical etc. Classical music is a complex form of music as it requires high musical skills like learning the ragas and ability to coordinate with other musicians .The one who wants to learn, he/she has to go through proper training in this field of music (Bhattacharyya, 2008). Classical music is different from other types due to its instruments and form. Classical music can be described as of having two kinds, western classical music and eastern classical music. The central norms of western classical music were codified from 1750 to 1820, which is known as the classical period. The major instruments used in western classical music include, the piano, harpsichord, the organ and bagpipes. Western Classical music is also capable of taking on different forms such as, concerto, symphony, sonata, opera, dance music, suite, etude, symphonic poem etc. The composing of classical music aims to instill the music with a complex relationship between the emotional and the intellectual aspects. Classical musicians get extensive training and schooling to attain technical mastery before performing classical music. They understand the principles, and gain the knowledge that is essential for the performance of classical music (Grout et al, 1996). The origin of eastern classical Music was from, the Hindu traditions. The oldest of the scriptures and the Vedas describe music at length. The major instruments used include, the tabla, sitar, sarood, pakhawaj, tanpura, tambura, swarmandal, bansuri and sarangi. The eastern classical music is basically monophonic, and is arranged around a single melody line. The composition based on a particular raga, begins with the performers coming out in a ritualized order, first the drone instruments, then the soloist, then accompanists and percussionists. The musicians first tune their instrument. The tambura is played at a steady tone throughout the raga, by a student of the soloist. The raga begins with the melody being developed gradually. The beginning of the raga is called an alap. Once the raga is established, the ornamentation begins to become rhythmical, which gradually speeds up. This section is the jor. After the jor reaches its climax, everything stops and then finally the percussioni st begins to play while interacting with the soloist. Beginning from India, the classical music tradition has extended towards Pakistan and also Afghanistan. The major vocal forms of eastern classical music include, Dhurpad, which is a style of singing, is accompanied by tempura and pakhawaj. The lyrics are heroic in theme, or otherwise in a praising tone. The, Ghazal originally being Persian in form, exists in multiple variations. The Khayal is an informal form of vocal music. It is partially Improvised and emotional in nature. The Tarana, are songs that are used to convey a mood of elation. They have a few lyrics and are mostly composed of rhythmic sounds. Thumri is an accessible and informal vocal form. The lyrics are typically in a language called braj bhasha, and are usually romantic. The system of notation called sargam holds a very important place in classical music of the east. For eastern classical music, the expertise of voice, rather than the instruments is emphasized (Patnaik, 2006). Popular Music is music belonging to any number of musical styles that are widely popular. It covers mainstream music that does not falls into any specialized style such as jazz or hip hop. Popular music essentially includes the use of instruments such as guitar, violin, fiddle, piano, bass and drums. In these types of music, the bass guitar is an important instrument. This can be used in different intensities to emote feelings of anger, pride and others. As compared to classical music, popular music does not require expertise. Many people play popular music together with their friends, on a casual amateur basis. The roots of the music are found in African American and West African music (Moore, 2004). Mystical music is an outburst of the soul. It comprises of spacious, contemplative, heartfelt, trance inducing and psychedelic sounds. It is a mix of entrancing drones, structures, and rhythms. Mystic music is different from classical music in terms of its lyrical content. The sole theme of Mystical music is of building a connection with God. The singer addresses God as his beloved and tries to gain his acceptance Mystical music makes one explore a kind of rich sound experience that lifts and awakens one above normal consciousness. It is relaxing. Mystic music fulfills the purpose of music which is to help us contact the spiritual dimensions of life and reveal the secret to us and to, keep the spirit alive (Nasr, 1997). An important feature of Pakistani mystical music is the interchanging of gender of the singer. 1.1.3 Effects of Music Music holds a very significant position in our lives since the beginning. From the early beginning to the present day, interest in music with reference to healing and therapeutic experience has sustained (Bartlett, 1996). Researchers have found that about two-thirds of the inner ears cilia resonate only at the higher frequencies that are commonly found in music (3,000 20,000 Hz). This seems to indicate that primitive humans communicated primarily through song or tone. There are references to the divine alliance of music and medicine in classical antiquity and the healing function among primitive people (Schullian Schoen, 1948). Recent work on music has confirmed the effectiveness of music too. Music has been found to be capable of triggering Endorphins in the human body, which help the mind in creating sound images, thus making it possible for people to escape into painless worlds sheltered by their imaginations. Music can regularize or disturb the heart beat or relax or tense the nerves; it is also able to affect digestion, respiration and blood pressure (Tame, 1984). Ansdell (1995) suggested that music could act as a powerful tool with neuro-disability. In many instances it has been found that people with brain related problems were able to function in better ways while being exposed to music (Bunt Hoskyns, 2002). Mc Carty (1999) described how music could reduce negative emotions and increase positive emotions in healthy as well as clinically ill Music can decrease pain and depression while increasing mood and self esteem. A study indicated that tempo affected arousal, while mode of the music affected the mood (Husain, Thompson Schelenburg, 2002). Wellness is a product of healthy body, mind, spirit interactions, and, as a result music can be an important asset in creating the appropriate environment for persons healing (Stewart, 1990). Musics appeal to us is primarily emotional and psychological. Music has been noted for its ability to enhance peoples moods, move them to tears, make them want to rejoice or just move them emotionally in both negative and positive ways (Goldstein, 1980). Radocy and Boyle (1979) suggested eight kinds of affective responses to music. Some are related to an innate sensory perception of the sound whereas; others are related to images, experiences and emotional context of the experiences. These responses may include simple, negative and positive feelings, and moral or religious temperaments. Thus, music is often capable of helping people in dealing with the issues which they have not dealt with earlier in their lives. (Bright, 1993; Levine, 1999; Ortiz, 1997). According to Stewart (1990) music can act as an affective therapeutic agent under the right circumstances. Music can be helpful to us in initiating psychological movement by altering our mental states and leading us towards more positive affirmations (Blaking, 1990). Menuhin (1972) revealed further that music can bring order out of chaos, because rhythm makes the divergent unanimous, melody turns the disjointed into continuous, and harmony is capable of imposing compatibility among the incongruous. Sloboda (1989), states that, most of us take part in musical activities because it can arouse deep and significant emotions in us. The music itself cannot have extra musical meaning unless the experience to which it refers already exists in the mind of the listener. When music is similar to the connections with human life, then people experience intense emotions. Particular kinds of music are capable of moving painful memories or the unresolved problem in life. Storr (1990) believes that apart from the relations between seeing an emotional arousal, the relation between hearing and emotional arousal is stronger. Campbell Angus (1976), in a study observed that when people communicate with the emotional centers of our being through the use of music; we become better able to reduce stress and achieve a sense of well-being. Diamond (1979) suggests that music can be used as an important part of primary preventative health care at a psychosocial level. It has been reported that music is an activity which the healthy, impaired, talented and interested enjoy, because it provides them with a relief from their stress, anxiety (Blacking, 1995). Music if combined with personal attention and, can provide satisfaction and restore a sense of value to people who may be feeling depressed or low in self-esteem (Crystal, Grober Masur, 1989). In view of Hallan Price (1998), calming music led to better participant performance on arithmetic and memory tasks. Music can line up patterns of emotions, structures of consciousness and / or psychic energy (Stewart, 1990). Thus, music has great influences on a listener. It can take the mind and body to do spontaneous things. Depending on the type of music and the inner message it has, music can influence a person and his/her actions (Cassidy Byo, 2008). Happiness In this older sense, Happiness was used to translate the Greek Eudemonia. There has been a surge of interest in Positive Psychology during the last quarter of this century. There has been a huge amount of interest and research on happiness, well-being and satisfaction among all positive fields (Diener Diener, 1995). The term happiness is synonymous to subjective well- being (Seligman and Csikszentmihalyi, 2000). Happiness can be defined as a feeling about yourself and the outside world. It is born from the internal workings of our own minds (Diener et all, 1997). Yew-Kwan Ng and Siang Ng (2000), define happiness as a complete state of mental health. They have defined emotional happiness as the presence of positive affect and life satisfaction with the absence of negative affect. It is a positive emotional state that is defined by every person on a subjective level. Diener, Scolon Lueas (2003) define Happiness as an overall appraisal of life, where the good and the bad are balanced. According to one of the founders of positive psychology, Seligman (2002), happiness consists of positive emotions and positive activities, emotions can be categorized as they are related to the past, present and future. Positive emotions concerning the past include satisfaction, contentment, pride and serenity whereas, positive emotions that are associated with the future include optimism, hope and trust. Veenhoven (1997) has defined happiness or subjective well-being as the degree to which one judges the quality of his life favorably. According to Schwartz Strack (1999), even very minor incidents in life can affect the level of happiness; however, Kahneman Schkade (1998), state that external circumstances are have little effect on happiness or subjective well- being. Theories of happiness The basic theories of happiness have been divided into two types, Top down theory Bottom up theory Bottom-Up Theory: Happiness and satisfaction depend on the sum of many smaller pleasures and happy moments (Diener Scwartz, 1984). In the perspective, of the bottom-up theory, well- being or happiness is a summing up of the positive experiences in a persons life. The assessment of satisfaction is considered in a small number of lifes domains. According to this theory, people self-rate their subjective well being with the help of a variety of external circumstances. The frequency of the pleasant moments makes a person happier. These circumstances may include the level of ones marriage, income work and family etc (Linley, Joseph Seligman, 2004). In this view, the objective life experiences, postulate the overall happiness. Top-Down Theory: The other perspective assumes that happiness is more related to general tendency to assess and infer to experiences in a positive way. From this point of view, a person brings tendencies of positivity towards the situations that he encounters. This view to subjective well being is known as top-down theory. This approach is mostly considered by observing personality traits or attitudes (Linley, Joseph Seligman, 2004). This theory states that people, who are over all satisfied with life, are satisfied with everything. People possess a disposition to judge lifes experiences in negative of positive ways. There are also other models of happiness which include, Need/goal satisfaction model, Process/activity model, Genetic/personality predisposition models. Psychoanalytic and humanistic theorists believe that reduction in tension and satisfaction of needs lead to the achievement of happiness. It was theorized that people were happy as they had achieved their goals (Compton, 2005). Emmons Diener (1986) has also emphasized how pursuing goals generates happiness. According to the process/activity theorists, participating in activities generates happiness. Csikszentmihalyi (1990) proposed that people who indulge in interesting and challenging activities, and experience the feelings of flow, as a result, are happier. The genetic/personality theorists view happiness as a stable construct. A Research by Costa and McCrae (1986) suggested that happiness is based on personality and genetics. Similarly, Lucas (1996) also found in a research that personality traits were closely related to happiness. Most of recent researches agree with idea of happiness being a combination of psychological, emotional, and physical well-being. Correlates of Happiness Individual differences in the levels of happiness have their significance, but studies have shown that predictors of happiness can be indicated and generalized. Evidence has been found that environmental factors and happiness can be correlated. However, it was also found that demographic variables, together account for less than 20% variance in happiness or subjective well- being (Campbell et al., 1976). A study by (Suhail Chaudary, 2003) found that work satisfaction, social support, religious affiliation, social class, income level, and marital status and marital satisfaction can be the predictors of happiness. Marital status and satisfaction: It has been found that marriage and happiness correlate significantly. Diener, Suh, Lucas, Smith (1999), found that unmarried people who cohabit with their partners are significantly happier in a few cultures. Research has shown that married people are happier as compared to unmarried, divorced, separated or widowed people. Shields Wooden (2003) found that married women and men were consistently happier than unmarried men and women. Finances: Financial status is related to happiness; however with an increase the effect diminishes (Diener, Diener Carol, 1995). Veenhoven (1994), stated that People of third world countries relate their happiness more to wealth. Evidence shows that relationship between happiness and wealth depends on the value that one associates with money (Burroughs, James Rindflisch, 2002). 3) Health: Physical health is strongly related to levels of happiness. If one is physically healthy he/she would have higher levels of happiness as compared to a person who is sick. Ryan Deci (2001) found that perceptions of health have more effect on happiness than objective health. If one is healthy (physically), then one experiences a feeling of well- being (Feist, Bodner, Jacobs, Miles Tan, 1995). According to physicians, Brief, Butcher, George Link (1993) a strong correlation exists between happiness and health. 4) Gender: women have been generally found to report higher levels of subjective well- being or happiness. Fujita, Diener Sandvick (1991) reported that women showed greater capacity for joy. Similarly, in a study by Wood, Rhodes Whelan (1989), it was found that women report slightly higher levels of happiness. However, Shayam and Yadev (2006) found that elderly men scored higher on well-being as compared to elderly women. In a study by Pennebaker, Rime Blankenship (1996), women expressed more intense emotions then men. Women also rated themselves as more verbally expressive than men. 5) Education: education does affect the happiness of people positively. Layard (2005), found that education is capable of increasing happiness indirectly, as it effects the ability to earn. Education has greater affect on the happiness levels of people with lower incomes (Campbell et al, 1976).Education appears to have only small direct influence on happiness. Life Events: Peak experiences have been found to be due to religion music or other intense activities. Diener Lucas (1999), state that subjective well-being correlates with friendship activities, having frequency of occurrence. The number of positive events correlates with positive affect (Schimmack, Diener Oishi 2002). Heady Wearing (1989) found that areas of friendship and work, increase happiness. 7) Culture: Diener Suh (1999) found that some nations appear to be more emotional than other nations. It was also found that happiness varies with interpersonal trust of people (Diener Suh, 2000). It was found that people in individualistic cultures had higher subjective well-being as compared to collectivistic cultures (Ball, 2001). 8) Religion: Many researches support that people who are religious tend to be happier. Studies have found that engagement in religious activities is significantly related to higher well-being (Donahue Benson, 1995). Peacock and Poloma (1999) found that ones perceived closeness to God was a very strong predictor of happiness. 1.3 Literature Review Immense research has been done to investigate the effects of music on physical as well as mental health. Researches have found that music has made positive influences on the physiological, psychological and the social domains. In a study, Fratianne, Prensner, Huston, Super, Yowler Standley (2001), conducted a study on patients at a burn care centre and found that the group which received the music therapy intervention, reported significant reduction in pain, compared to the groups having no music therapy. This conformed that music therapy is a valuable non-invasive intervention for the treatment of pain after burn injury. Nering (2002), in an experimental study investigated the effect of piano and music instruction on intelligence of monozygotic twins. Post-tests on the Wechsler standardized intelligence tests indicated that, that music instruction through individual piano lessons increased intelligence. Weinberger Norman (1998) conducted research to investigate if music is capable of improving brain development. They found that music not only improves our brain development, it even enhances skills like reading and mathematics. Music promotes social development, self -worth, personality adjustment, and also enhances creativity. It was also found that music making provides the most all-embracing exercise for brain cells and the synaptic interconnections. A study on the effect of music therapy in treatment of social isolation in visually impaired children was conducted. It discussed how that music therapy can be helpful in making the child explore his environment, and modify stereotypic, autistic-like behaviours, and encourage social awareness and interaction with other children. The results indicated that Music evokes profound responses without the help of words and therefore, can reach children with the severest disabilities (Gourgey, 1998). In another experimental study on the effect of music, Hallman, Price, and Katsarou (2002), found that calming music led to better participant performance on an arithmetic task and a memory task than no music. It was also found that background music on cognitive test performance led to improved performance when compared with a control condition (Cockerton, Tracey, Moore, Simon, Norman Dale, 1997). A study by Rideout Taylor (1997), involved 16 female and 16 male undergraduates, who completed two equivalent spatial tests, Results indicated that exposure to classical music, given to undergraduate students caused a small but significant improvement in spatial tests. In a study entitled, Music therapy for adolescents, Tervo (2001), suggested that music makes adolescents become expressive, be in contact with and share among themselves feelings of anger, rage, grief, longing and psychological disintegration. It provides opportunities to feel closeness or isolation and to explore sexual fantasies and feelings. Standley Hughes (1997) evaluated the effects of music sessions which were designed to enhance pre-reading and writing skills of 24 children (aged 4-5 yrs). The children were enrolled in Early Intervention and Exceptional Student Education (ESE) programs. The music treatment was provided along with the regular prekindergarten course. Pre and post-tests revealed that music significantly improved print concepts and prewriting skills of the children. A study by Chalmers, Olson Zurkowski (1999) examined the effect of music on lunchroom noise level and on the behaviours of children requiring intervention. The playing of classical music indicated that the noise level dropped to an average of six decibels, whereas, upon playing popular music the noise level decreased by ten decibels. In both conditions, music was capable of decreasing behavioral interventions. Covington (2001) stated that, many patients with psychiatric disorders struggle with poor skills in coping, socialization, communication, and self-expression which leads to dysfunctional cognitive, behavioral, and emotional responses. It was found that therapeutic music offers a noninvasive approach which helps in strengthening the skills and effect behavior change. Ming (2002) explored the Anxiety, Depression and self- esteem of undergraduates. The study examined the effects of music therapy on anxiety, depression and self-esteem of undergraduates. Twenty-four undergraduates showing greater anxiety and depression with lower self-esteem were assigned to experimental and control groups. The experimental group was provided twenty hours of music therapy, unlike the control group which did not receive any treatment. Quantitative and qualitative analyses indicated that the experimental group showed a reduction in anxiety immediately after the music therapy, the group expressed that they experienced more positive changes, including more pleasure, relaxation, and confidence, and less negative emotions. Chlan Linda (1998) investigated the effectiveness of a music therapy intervention on relaxation and anxiety for patients receiving ventilatory assistance. They used mystical music as music therapy. Mystical music therapy was found to be effective in decreasing anxiety and promoting relaxation. Decrease in heart and respiratory rate was also found. In another research, Smith and Noon (1998) investigated mood change induced by contemporary music. When analysis was done, it was found that all the pieces of music produced an overall change in mood. Popular/independent music produced highly significant changes. Ostertag (2002), in his article on music therapy with abused children stated that music therapy can play a very important part in the change process of abused children, specially while addressing emotional and relationship issues which are difficult to address using the cognitive or behavioural treatment models. Hendricks (2001), in his study on the use of music therapy techniques in a group for the treatment of adolescent depression, stated that one in five adolescents is effected by depression, which results in substance abuse, anorexia nervosa, poor academic performance and adolescent pregnancy. He investigated the use of music in a school setting for the treatment of adolescent depression. The pre and post test scores showed that the use of music therapy techniques positively correlated with reduced depression increased self-concept in the participants. In a study, Labbà ©, Schmidt, Babin Pharr (2007), conducted a study using a sample of 15 males and 41 female college students. They were exposed to classical and relaxing music after experiencing a stressful test. It was found that listening to classical and relaxing music after exposure to a stressor resulted in significant reductions in anxiety, anger, and sympathetic nervous system arousal, and increase in relaxation when compared to listening to heavy metal music or sitting in silence. In a study titled, An experience sampling study of emotional reactions to music: Listener, music, and situation, Juslin, Liljestrà ¶m, Và ¤stfjà ¤ll, Barradas, Silva (2008), investigated the prevalence of different musical emotions and how such emotions are related to various factors in th