Key Ideas of Liberalism Essay Example | Topics and Well Written Essays - 750 words

Key Ideas of Liberalism - Essay Example Political liberalism Liberalism supports constitutional democracy. Liberalism advocates for the protection of human and individual civil rights as well as their freedoms. Under political liberalism, every human being should be fairly and equally treated under the rule of law. Political liberalism seeks at preventing tyranny by supporting constitutional forms of democracy where power becomes vested upon individuals elected by people being governed (Hobhouse 2009, p.19). Liberalism advocates that representative democracy is the best form of government as there is balance between the rule and rights of minority. Liberalism ideally stipulates that power of government should be limited through decentralization. Liberalism vests the power of the government in the ability of people to choose their leaders through free and fair voting systems. Through constitutional democracy, liberalists postulate that the rule of law should be limited. People should be able to govern themselves by voting in their preferred lea ders. The church and government should be separated and treated differently. Political liberalism advocates for competitive politics through multi-party politics (Hobhouse 2009, p.19). Individuals become allowed to freely choose political parties that represent their ideologies. Governments’ sole aim becomes to protect the rights of its citizens by following a constitution designed by its citizens. The government should be distinguished from society according to political liberalism.... Trade should be designed to be free, fair and open within a state or between states. Liberalists argue that free, open and fair trade allow for economic expansion and promotes international peace. Economic liberalism also argues for economic freedom where individuals take part in economic forms they desire. Liberalists also stipulate that the state should provide equal economic opportunity for all. All human beings should be provided with economic freedom such as to trade. Social liberalism Social liberalism concerns itself with protection and expansion of human rights as well as civil liberty (Hobhouse 2009, p.14). Liberalism stipulates that governments should protect the rights of its individuals. Liberalist ideals argue for human rights such as those to speech, religion and association. Human rights and freedom should be accorded to everyone without the use of force. The freedom of speech allows for individuals to express their ideas freely without force or violence. Freedom of re ligion states that an individual has the freedom to worship whoever he or she desires. Under liberalism, individuals have the right to assembly or association. This allows for individuals to gather and associate with whoever they please. Social liberalism advocates for freedom and strength in a civil society. Social liberalism stipulates that individuals should be allowed their freedom unless it infringes on the rights of others under which they can become curtailed. Everybody is allowed the same equal rights not limited to their gender, race, ethnicity, religion, nationality or sexual orientation. Social liberalism ideals also allow for social inclusion and tolerance of different lifestyles unless they infringe on the rights of others.

Managing Change in Contemporary Organization Essay

Managing Change in Contemporary Organization - Essay Example The environment, which engulfs an organisation, provides the resources and opportunities for the organizations existence. At the same time, the environment itself imposes sanctions determining what an organization can or cannot do. If an organization is to survive, grow and remain prosperous, if must adaft to the demands of the environment, since these demands are constantly changing, organizations must also change. The last decade has brought with it a time of totally unprecedented change. In every direction businesses are in turmoil, from computing to financial services, from telecommunications to health change is an accelerating and yet there is fundamental dilemma. People need time get used to change, but there is not anytime anymore. The pace of change is now so fast that business face constant market change and must respond very rapidly if they are to survive. Many don't make it. Evidence suggests that the average corporate life styles may be shrinking because of a mobility to change and adopt fast enough. For this reason managing change has now become a crucial part of competitive edge (Clarke, 2002). Organisational change is the alternation of work environment in the organisation. It implies a new equilibrium between different components of the organisation technology, structural arrangement, job design and people. Thus organisational change may have following features. 1. When change occurs is any part of the organization, it disturbs the old equilibrium necessitating the development of a new equilibrium depends on the degree of change and its impact on the organization. 2. Any change may affect the whole organization. Some parts of the organization may be affected more, others less; some parts are affected directly, others indirectly. 3. Organizational change is a continuous process. Newstrom and Davis (1997) have explained the impact of a change in any part of the organization of the total organization. They have illustrated it by comparing an organization to an air filled balloon. They have concluded that the whole organisation tends to be affected by the change in any part of it (Newstrom & Davis, 1997) However, the change in the organization does not occur purely on mechanical relationship. While managers as a change agent want to bring changes in the organization employees want to maintain a status quo. Factors in Organizational Change : Organizational changes are required to maintain equilibrium between various external and internal forces to achieve Organizational goals. Therefore,

Assignment On Aircraft Power Systems

Assignment On Aircraft Power Systems In this assignment, I intend to provide a brief presentation about the principle of operation of the aircraft electrical power systems, specifically, Integrated Drive Generators (IDG) in a modern aircraft. I will compare and contrast the fluid and electrical methods of power generation and give a brief on the safety precautions to be followed when handling aircraft electrical power supplies and during a functional test. There are various kinds of power generation on an aircraft, namely electrical (generators batteries), fluid (hydraulics pneumatics). Depending upon the application, the power sources may vary. AIRCRAFT ELECTRICAL SYSTEM The main function of any aircraft electrical system is to generate, regulate and distribute the electrical power in the aircraft. Modern aircrafts use more electrical power as they are equipped with more Electronic Flight Instrument System (EFIS). This is done so as to reduce pollution in the environment, for a clean and safe flight. Electrical power is used to operate: Aircraft Flight Instrument- Electronic Centralized Aircraft Monitoring (ECAM) Essential Systems- Primary Flight Display (PFD), Navigation Display (ND) Passenger Services- In-Flight Entertainment (IFE) Most of the aircraft systems use a power standard of 115 [emailprotected] 400Hz; 28VDC. There are various electrical power sources on the aircraft: Engine Driven AC Generators (EDG) Auxiliary Power Units (APU) Ram Air Turbine (RAT) Battery Supply External/Ground Supply (Spoor, 2012) Components in an electrical system include: AC Generator/Alternator produces AC power. Constant Speed Drive Unit (CSDU) regulates the rotating speed (input) to deliver a constant output from the engine to the generator. Integrated Drive Generator (IDG), Generator and CSDU connected either coaxially or side-by-side. Mostly coaxial connection. Transformer Rectifier Unit (TRU) converts the AC power to DC power Generator Control Unit (GCU) monitors and controls the generator output. Each engine powers up one or more generators. Airbus A380 has four engines and four generators. Whereas, Boeing 777 has two engines and two generators. The power produced by these generators is used to power up the entire aircraft. (Boeing, 2012) All the other power sources, except external supply, are used in case of emergencies only. External power supply is used on ground when the engines and the APU are not running. It is supplied via Ground Power Unit (GPU). GPU can be portable or stationary and they provide AC power through the external plug on the nose of the aircraft. They can be used to power up an entire aircraft or a specific area in the aircraft. (Spoor, 2012) Figure : Aircraft Electrical System (Classic Jet Sims, 2012) AIRCRAFT HYDRAULIC SYSTEM The principle of a hydraulic system is to convert fluid power into mechanical power and then use it for various applications on the aircraft, such as extension/retraction of landing gears, flaps, and speed and wheel brakes. The power source here is the hydraulic fluid. The pressure for generating the hydraulic power is supplied by the Engine Driven Pump (EDP) and the Electric Motor Driven Pump (EMDP). They are both mounted on the engines. Commonly used hydraulic fluids on the aircraft are: MIL-H-5606 (Mineral Based Fluid) MIL-H-83282 (Synthetic Hydrocarbon Based Fluid) MIL-H-87257 (Same as MIL-H-83282, but it has been improved in its low temperature viscosity) MIL-H-8446 (Phosphate-Ester Based Fluid) (Wikipedia, 2012) Special care must be taken when handling the hydraulic fluid. Some of the hydraulic fluids are skin/eye irritant. Also it is extremely important for the fluid to be free from any contamination for flight safety. Advantages of the hydraulic system as a power source includes: Lightweight Easy installation Simplified Inspection Minimum Maintenance Approximately 100% system efficiency, with only negligible loss due to friction. (EAC, 2012) Figure : Basic Hydraulic System (Free Online Private Pilot Ground School, 2006) COMPARISON OF AIRCRAFT ELECTRICAL AND HYDRAULIC SYSTEM FEATURE ELECTRONIC HYDRAULIC Construction Power is generated by the engine, by rotation of turbine shaft. Power is generated by incompressible hydraulic fluid. Pressure for hydraulic actuation is supplied by EMDP and EDP. Similar to that of an electric circuit. Components include: Generators/Alternators, Batteries, Switches, Bus bars, Fuses, Circuit Breakers, Voltage Regulators, Ammeters, and Wires. (Free Online Private Pilot Ground School, 2006) Components include: Reservoir, Pump, Hydraulic Fluid, Accumulators, Actuators, Filters, Hydraulic Fuses, Tubing, Pipes, Valves, and Seals. Uses Lights, Radio Equipment, Indicators, Warning Systems, Heaters, Starting motor. (FlightLearnings, 2012) Extension/retraction of landing gears, flaps, and speed and wheel brakes. Principle of Operation Generate, Regulate and Distribute electrical power generated. Work is done by moving an incompressible fluid, Pascals Law. (EAC, 2012) EMERGENCY DEPLOYMENTS IN EVENT OF GENERATOR(S) FAILURE In case of main engine driven generator (EDP) failure, there are various methods to ensure continued power supply for safe landing: Auxiliary Power Unit (APU) Ram Air Turbine (RAT) Battery When the main engine generators fail, APU or RAT is deployed. When the secondary methods fail, batteries are used as the last resort for a safe landing and evacuation. AUXILIARY POWER UNIT (APU) Auxiliary Power Units (APUs) is a small gas turbine engine which provides electrical, hydraulic and pneumatic power (depending on the design) for ground or in-flight operations. It is also used as a backup source in emergency situations. It is commonly found on large aircrafts. It is usually located in the tail end of the aircraft. When started, it normally runs on 100% speed. It produces 115VAC @ 400Hz. Some can also generate 28VDC. The main purpose of the APU is to start the engines in the aircraft. This is because the engine requires high rotational speed for its self-sustaining operation. In this case, APU is started by battery or hydraulic accumulator and then used to generate the necessary rotational speed. It is also used to run the equipment when the engines are shutdown. This is used for air conditioning for the passengers prior to engine start. However, it can also be connected to a hydraulic pump to power up hydraulic equipment (flaps and flight controls). (Wikipedia 2012) RAM AIR TURBINE (RAT) Ram Air Turbine is a small airflow driven turbine that is connected to either a hydraulic pump or an emergency alternator or a main generator. In normal flight, it is stowed away in closed compartment in wing or fuselage. It is deployed only when there is total power loss due to engine failures. It provides enough power to run the critical systems, such as, flight controls. The power generated by the RAT depends on the airspeed. More the speed, more the power generated will be. Some aircrafts use RAT in normal operation. For example, in crop dusting RAT is used to power up the chemical sprayer. (Wikipedia, 2012) BATTERY Aircraft batteries are used to start the engines or the APU. But they are also used in emergency situations as a last resort for safe landing. There have been cases where it has been used to restart the engines even after engine flame-out. They also act as a buffer for the DC connections. It regulates the voltage to ensure the power quality for the equipment connected to it. Two types of batteries are used in aircrafts today, Lead-acid and Nickel Cadmium (Ni-Cd). Lead-acid batteries are either valve regulated or vented. They are used in light and general aircrafts. Ni-Cd batteries are used in larger aircrafts. Lead-acid batteries are generally heavier and have less capacity than the Ni-Cd ones. (Dr. Thomas, 2010) Figure : Lead-Acid Battery (Chief Aircraft, 2012) Figure 4: Nickel-Cadmium Battery (Surplustraders.net, 2012) AIRCRAFT ELECTRICAL SYSTEM USING FREQUENCY WILD AC GENERATOR From 1950s to early 1960s some turboprop aircrafts used frequency wild, now Variable Frequency (VF) system. Airbus A380 and Boeing 787 Dreamliner are some of the modern civil aviation aircrafts that have adopted the VF system again. Figure : Simplified Frequency Wild System (Scribd, 2012) CONSTRUCTION As shown in Fig.4, the Variable Frequency Generator (VFG) is directly connected to the engine gear box. (Langlois, 2004) states: VFG is a conventional wound rotor synchronous alternator. There is no CSD or IDG in this system. This is done so as to improve the reliability of the system and also to reduce the weight of the aircraft. Airbus A380 uses aluminium cables instead of copper for weight reduction. The system is also fully computerized. Contactors and Breakers have been replaced by solid-state devices for increased reliability and performance (Global Aircraft, 2012). OPERATION Frequency Wild AC power can only be supplied to the resistive circuits such as the electrical heater, engine de-icing heaters, windshield heating, etc. as shown in Fig. 4. The AC power generated is sent to the TRU where the voltage is stepped down from 360Hz-760Hz (Langlois, 2004) to 28V and then rectified to DC voltage. Then it is used by the DC components. CONTROL PROTECTION A traditional Constant Frequency unit has only a constant frequency of 400Hz voltage supply. A constant speed drive unit drives the generator. It is also expensive and not easy to maintain. A VFG is flexible as it can handle a range of frequencies rather than a constant one. In this unit, there is no CSD or IDG. It is more advantageous over Constant Frequency Unit because: It has low maintenance Long lifespan Cheaper Process temperature is controlled within VFG itself. Equipment protection from excess torque damage The variable frequency generator (VFG) is used on applications with a high percentage of resistive AC or DC loads and provides power to many of the next generation aircraft. Hamilton Sundstrands variable frequency starter generator (VFSG) and motor controller system provides main engine start and control. The voltage is controlled around the generator. This is done by controlling field strength of the AC generator by feedback signal from the voltage regulator, which keeps the voltage constant irrespective of the speed and load variations. VFGs are preferred over DC systems because they were much less affected by poor brush performance at higher altitudes and they had better power to weight ratio. AC/DC ELECTRIC MOTORS AND ACTUATORS PERFORMANCE DC actuators are typically high-speed reversible series-wound motors. Their output is converted to driving torque using step-down gearbox. These motor actuators are self-contained units, as they combine both electrical and mechanical devices. They can exert linear thrust over a short distance. AC MOTOR DC MOTOR

Michael Henchard in The Mayor of Casterbridge by Thomas Hardy Essay

Michael Henchard in The Mayor of Casterbridge by Thomas Hardy Michael Henchard is a character with traits that have both a positive and negative traits effect on his life. I believe the characteristics that allowed Henchard to rise to social respectability and fall into destitution where the same. "Character is fate"(Plato) For example Henchard stubbornness and pride allowed him to keep his 21-year vow not to drink. This shows his stubbornness brought an aspect forbearance. However the same character traits also made him rely on a prediction from a fortuneteller becoming his financial downfall. This is same aspect of Henchard that made him so forbearing and committed to his wedding vows with Susan. This characteristic allowed him to be reliable, something that greatly assisted him to being respected in the town. However, if he would have not been so honourable and turned Susan away, it may have all worked out better. I can speculate, he could have married Lucetta and her money would have been a great asset to hi...

Positive Leadership Essay

Positive leadership refers to the application of positive principles and positive change. It helps leaders to become more effective in their jobs. Applying principles of positive leadership leads to extraordinary performance. Positive leadership has three connotations: 1)It refers to the facilitation of extraordinarily positive performance – that is, positively deviant performance. Outcomes that exceed common or expected performance. 2)Affirmative bias – or a focus on strengths and capabilities and on affirming human potential. It emphasizes positive communication, optimism, and strengths as well as the value and opportunity embedded in problems and weaknesses. 3)Facilitating the best on the human condition, or on fostering virtuousness. An easy way to identify positive leadership is to notice positive deviance. Many positive outcomes are stimulated by trials and difficulties; for example, demonstrated courage, resilience, forgiveness and compassion are relevant only in the context of negative occurrences. â€Å"Bad is stronger than good†. Human being react more strongly to negative phenomena than to positive phenomena. Both conducive and challenging conditions may lead to positive deviance. The few organizations that perform in extraordinary ways, which are the exception, not the rule, are positively deviant. In this case, positive deviance implies more than earning more revenue than the industry average. It involves thriving, flourishing, even virtuous performance, or achieving the best of the human condition. There are 4 strategies to achieve a positive deviance. they are among the most important enablers of positively deviant performance) 1)Positive climate (foster: compassion, forgiveness and gratitude)

Orchestra Concert

The music played throughout all of the concerts adhered to be diverse. The instruments, the individuals performing, and the conductor all proved to be outstanding. The concerts proved to be interesting as I witnessed them, first hand. The first concert I attended was performed by the Dallas Symphony Orchestra. The orchestra had performed Shostakovich’s â€Å"Symphony NO. 7, Leningrad† from the Romantic era. The orchestra was a large ensemble (1) containing various instruments that contributed to the overall sound of the piece. Since the orchestra was a large ensemble, just like the instrumentation common in the Romantic era, the orchestra was able to perform in a lively, vigorous manner, probably vivace (2). The orchestra performed tutti (3), in which all of the instruments of the ensemble played together. Every member of the orchestra played with exactness and steady energy, or in other words, con gusto (4). Overall, all the instruments included in the ensemble were needed for the piece to sound fanciful. In addition to the large ensemble, the orchestra played in an allargando (5) manner, in which the orchestra grew louder and then softer, which is also common to the Romantic era. As the orchestra progressed through the piece, the orchestra used various bow styles in order to dramatize the music. The ensemble played the symphony using legato, marcato (5), and spiccato (6), which contributed to the immense sound. The composer’s style of this piece was typical for the Romantic era because the composition was extensive, and included the piano, which is a well-known, as well as, important instrument in the Romantic era. The symphony, although has many characteristics included in the Romantic era, is not completely similar to other pieces that I have performed that are included in the Romantic era. Unlike the Shostakovich’s symphony, â€Å"Largo†, is a slow and steady piece that includes dynamic fluctuations. Similar to the symphony, the piece â€Å"Bacchanale† involves using marcato throughout the piece. While the orchestra was performing, the audience sat silent in order to observe the orchestra. All of the members of the orchestra seemed to be attentive to the conductor, which is important because every member of the orchestra needs to be aware of what is going to happen next in the music. The brass and the string had sections in the music, where they were the most important parts. Overall, the Dallas Symphony Orchestra performed well as a whole group. The second concert I attended was performed by the Richardson Symphony Orchestra. The orchestra performed â€Å"Passacaglia and Fugue in C minor, BWV 582† by Bach, which is part of the Baroque era. The string instruments of the orchestra performed with the hair of the bow, in other words, arco (7). By using lots of motion or most commonly known as mosso (8), the orchestra increased the tension of the piece. The orchestra played at a pretty fast tempo (9), probably allegro. The piece had a distinct part where the harp played. The ensemble was large, in order to attain the full sound of the piece. The instruments played in the orchestra did not comply with the typical orchestras of the Baroque era because it did not have a distinct part where were the main instruments were the piano and the bass, or more commonly known as basso continuo (10). Along with the use of basso continuo, the orchestra used ornamentation by adding grace notes (11) throughout the piece. The Baroque era also included the doctrine of affections (12), in which the Richardson Symphony Orchestra demonstrated by playing faster notes to demonstrate happiness. The style of the composer was distinctive of the Baroque era because he use both ornamentation and doctrine of affections. The bow stroke of the piece that was mostly used was legato. Unlike the piece we previously played in orchestra which is also part of the Baroque era (â€Å"Allegro in D for Strings†), the piece the symphony performed did not have the marcato stroke. My favorite part of the whole composition was when the harp was playing distinctly, but overall the orchestra played magnificently. The intonation of the orchestra was precise and all of the members of the orchestra played well as a whole. The orchestra also performed â€Å"Concerto #23 in A major, K. 488† by Mozart, which is part of the Mozart era. The orchestra included many instruments, as well as the piano, which had a very important part in the piece. The piano seemed to have the solo (13) in the piece. The use of the piano is not a standard to the classical era, although it contributed to the overall sound of the piece. The piece that the orchestra performed was extensive, which is a common characteristic of the Classical era. The composition reflected a fanciful style, known as caprice (14). The composer used some of the typical characteristics of the Classical era, by making the piece lengthier than those of the Baroque era, but the composer also added a twist by using the piano. The orchestra used both legato and marcato to reflect a whimsical style. The composition most likely included cue notes (15), in order to guide the players who were not playing while the piano was. Similarly to the piece that the Richardson Symphony Orchestra performed, â€Å"Menuetto† by Mozart also reflects a fanciful style that uses legato. The composition that the orchestra performed made me feel light-hearted. All of the professional musicians that performed had paid attention to the piano solo, in addition to paying attention to the conductor. Most of the string instruments used the middle part of their bow, in order to play quickly which reflected a fast sound. All of the professional concerts that I attended were a great learning experience but were also a blast to watch.