Year 11 Physics: the World Communicates Dot Points

The World Communicates 1. The wave model can be used to explain how current technologies transfer information * describe the energy transformations required in one of the following: mobile telephone, fax/ modem, radio and television Energy transmission in mobile telephone: ound wave energy (input sound) -> electrical (in transmitting phone) – > radio wave (transmit signal) -> electrical (in receiving phone) -> sound (output sound) * describe waves as a transfer of energy disturbance that may occur in one, two or three dimensions, depending on the nature of the wave and the medium A wave is a travelling disturbance which transfers energy without transporting matter. They may occur in 1D, 2D or 3D, depending on the nature of the wave and the medium. D- slinky, laser light >>> only moves in one direction 2D- water wave >>> propagates in all directions on a single plane 3D-light, sound, all EM waves >>> spreads/ radiates in all directions fro m a single point *identify that mechanical waves require a medium for propagation while electromagnetic waves do not Mechanical waves require a medium (particles in order to propagate) while electromagnetic waves do not. Classification of Waves: in terms of medium > mechanical (requires), electromagnetic (doesn’t require) -in terms of particle oscillation > mechanical >>> transverse (perpendicular), longitudinal (parallel) * define and apply the following terms to the wave model: medium, displacement, amplitude, period, compression, rarefaction, crest, trough, transverse waves, longitudinal waves, frequency, wavelength, velocity Mechanical Waves -require a medium to propagate -involves the transfer of energy through a medium by the motion of particles of the medium itself -particles moves as oscillations or vibrations around a fixed pointTransverse waves (e. g. light) – mechanical waves – particles of the medium oscillate back and forth in a direc tion perpendicular to the direction of wave propagation -does not require a medium Longitudinal/compressional waves (e. g. sound) -mechanical waves -particles of the medium oscillate back and forth in a direction parallel to the direction of propagation -requires a medium Period (T) – time taken for a single wave to pass through a fixed point OR the time taken for a particle of a medium to make one complete oscillation (measured in seconds) -T = 1fFrequency (f) – number of waves that pass through a fixed point per second OR number of complete oscillations of a medium particle in one second (measured in hertz > Hz) Medium – material through which a wave can propagate Displacement-shortest distance from initial position to final position of a particle Amplitude (A) – maximum displacement of particles from the undisturbed state (equilibrium position) Compression – zones where particles are closer together than in their undisturbed state Rarefaction – zones where the particles are further apart than in their undisturbed state Crest- highest part of the wavesTrough- lowest part of the wave Wavelength (? ) – distance between 2 successive identical points on a wave (e. g. distance measured in metres, between adjacent crests or troughs) Velocity (v) – speed at which the wave transfers energy away from the source * describe the relationship between particle motion and the direction of energy propagation in transverse and longitudinal waves Particles in a transverse wave oscillate back and forth in direction perpendicular to direction of propagation.Particles in a longitudinal wave oscillate back and forth in direction parallel to direction of propagation. * quantify the relationship between velocity, frequency and wavelength for a wave: Velocity is directly proportional to the product of the frequency and wavelength of the wave. 2. Features of a wave model can be used to account for the properties of sound * id entify that sound waves are vibrations or oscillations of particles in a medium Sound Waves -are vibrations or oscillations of particles in a medium classed as a mechanical longitudinal wave -when sound wave propagates, vibrations of the particles create pressure variations within that medium -frequency of a sound is determined by the frequency of the original vibration,NOT by the medium it travels through (i. e. frequency of a sound doesn’t change through any medium) -speed of sound is different in different media -sound travels fastest in solids, followed by liquids then gases (i. e. higher density- particles packed more closely together- vibrations travel faster) -speed of sound in air = 343 m/s relate compressions and rarefactions of sound waves to the crests and troughs of transverse waves used to represent them Compressions > crests Rarefactions > troughs * explain qualitatively that pitch is related to frequency and volume to amplitude of sound waves The amplitud e of a sound wave determines the volume of the sound. high amplitude = high volumelow amplitude=low volume Likewise, the frequency of a sound wave is directly related to the pitch of a sound. The higher the frequency, the more vibrations per second, and thus, the higher the pitch.High frequency= high pitchlow frequency=low pitch * explain an echo as a reflection of a sound wave Echo – forms when a sound wave reflects off a hard surface and rebounds back to its original source, essentially becoming the reflection of a sound wave. – wide variety of applications including SONAR (Sound Navigation And Ranging) > method for finding the depth of water and detection of animals and other objects in water * describe the principle of superposition and compare the resulting waves to the original waves in sound Superposition- also known as wave interference when two or more waves of the same type pass through the same medium at the same time, they will interfere with each other -individual component waves will interfere to give the resultant wave -position of any point on the resultant wave is the sum of the amplitudes of the component waves -rules to superimpose component waves: 1. End points 2. Intersecting points 3. Crests/ Troughs -note: > curve + curve = curve gt; curve + line = curve > line + line = line > once component waves no longer interfere with each other, they will return to their initial state -constructive interference > component waves are in phase (crests and troughs aligned) -destructive interference > component waves 180? out of phase (crests of one wave aligned to troughs of the other and vice versa) > resultant wave is a straight line 3.Recent technological developments have allowed greater use of the electromagnetic spectrum * describe electromagnetic waves in terms of their speed in space and their lack of requirement of a medium for propagation Electromagnetic Waves – travel through space at the speed of li ght, 3Ãâ€"10? m/s. – do not require a medium to propagate (i. e. can pass through a vacuum, are all transverse waves) – e. g. gamma rays, X-rays, ultraviolet, visible (VIBGYOR), infrared, microwaves, radio waves * identify the lectromagnetic wavebands filtered out by the atmosphere, especially UV, X-rays and gamma rays Waves able to penetrate atmosphere and reach surface of the Earth> visible light, radio waves, microwaves -too much exposure to UV radiation can result in cancers and dangerous mutations -too much exposure to X-rays and Gamma radiation would quickly kill us -Earth’s atmosphere has the ability to absorb ay incoming high energy radiation * identify methods for the detection of various wavebands in the electromagnetic spectrum EM Wave| Detectors| Source|Gamma| Geiger Muller tube| Nuclei of radioactive atoms and cosmic rays| X-ray| Fluorescent screen| X-ray tubes| Ultraviolet (UV)| Photo/solar cellsFluorescent chemicals| Very hot objectsArcs and s parksMercury capour lamps| Visible| Photo/ solar cellsEye| Hot objectsLampsLasers| Infrared| Special photographic filmSkinSemiconductor devices such as LDR and photodiode| Warm and hot objects (e. g. ire, people)| Radio/ Microwaves| Aerials connected to tuned electric circuits in radio and TV sets| Microwaves and ovensTV and radio transmitters using electric circuits and aerialsOscillating electrons| Note: the sun is a producer of all EM waves sending all bandwidths to Earth Photographic film detects all EM waves except for radio/ microwaves * where k = amount of energy of source, d = distance away from source, I= intensity explain that the relationship between the intensity of electromagnetic radiation and distance from a source is an example of the inverse square law:Intensity – the energy received per square metre per second at a distance away from the source Attenuation – decrease in the strength of the signal or light -EM waves decrease in intensity the further th ey are away from the source – to reduce attenuation in long distance communication, signal needs to be either: > sent out as a very large strong signal > signals travelling long distances need to be amplified at repeater or booster stations along their path * outline how the modulation of mplitude or frequency of visible light, microwaves and/or radio waves can be used to transmit information Bandwidth – space taken up in terms of frequency Modulation – process of adding (encoding) signal information to an EM wave Amplitude Modulation -signal wave encoded onto carrier wave by adding amplitude of signal wave and carrier waves using principle of superposition -turns into resultant modulated wave -information stored in variations of amplitude -constant frequency, changing amplitudes when received, radio receiver will decode variation in amplitude to obtain original signal, which is then amplified Advantages| Disadvantages| * requires a much smaller bandwidth of frequencies for transmission * number of transmissions possible in the AM band is larger| * depend on changing of amplitude through superposition of waves and therefore e very prone to interference |Frequency Modulation -signal wave added to carrier waves by changing frequency of carrier wave -information stored in variations of frequency -constant amplitude, changing frequencies low signal corresponds to low frequency and vice versa for high signals Note: frequency bands = megahertz (MHz)= _x10^6 m/s Advantages| Disadvantages| * since FM waves store information on varying frequencies, less prone to interference -harder to influence frequency of a wave by interference and superposition| * each transmission utilises a large bandwidth * different transmitters must be allocated different frequency bands for transmission to avoide interference with each other * limited number of transmitters allowable in given area| discuss problems produced by the limited range of the electromagneti c spectrum available for communication purposes -each transmission requires different frequency bands, but available bandwidth for certain types of EM waves is limited so there’s a possibility may run out of bandwidth and have transmissions start interfering with each other 4. Many communication technologies use applications of reflection and refraction of electromagnetic waves * describe and apply the law of reflection and explain the effect of reflection from a plane surface on waves Reflection – When a wave strikes a boundary, it bounces back.This is known as the reflection of a wave. Law of Reflection: – angle of incidence is equal to the angle of reflection – incident ray, reflected ray and the normal are on the same plane * describe ways in which applications of reflection of light, radio waves and microwaves have assisted in information transfer Light > fibre optic communcation Radio waves > AM/ FM radio transmission Microwaves > microwave repeating stations (to boost intensity of received signals through use of parabolic concave surface of satellite dishes) > mobile phone, internet cable data describe one application of reflection for each of the following: plane surfaces, concave surfaces, convex surfaces, radio waves being reflected by the ionosphere Plane > dressing and shaving Parabolic concave > satellite dishes (to reflect incoming signals to an antenna at the focus, hence amplifying signal), used in microwave repeating stations and radar control towers to boost intensity of received signals) >produce parallel beams of light used in torches, car headlight, etc Convex > shop security mirrors and side view mirrors (provides wider range of view) Radio waves reflected by ionosphereIonosphere – region of Earth’s atmosphere which consists of charged particles (electrons and ions) -charged property allows it to reflect low frequency (high wavelength) EM waves such as radio waves -this ref lection property enables the transmission of radio waves to receivers that are ‘out of sight’ due to the Earth’s curvature * explain that refraction is related to the velocities of a wave in different media and outline how this may result in the bending of a wavefront Wavefront – a line that joins all the point that are in phase in a wave (e. . a line that joins all crests, so is perpendicular to direction of propagation) Refraction – when waves travel from one medium to another, where they experience a change in speed, travel different distances (for the same interval of time), causing its wavefronts to bend. This changes the direction of propagation of the wave. Exception – when wave hits boundary between the two media at right angles, incident wavefronts are parallel to boundary, or incident angle is 0? -wavelength and velocity change -frequency remains the sameWhen a wave travels from a more dense to a less dense medium, direction of wave bends away from the normal and vice versa. Note: deep water is less dense than shallow water * define refractive index in terms of changes in the velocity of a wave in passing from one medium to another Refractive Index – the absolute refractive index of a material is a ratio of the speed of light in a vacuum to the speed of light in the material RI = cv , where c is the speed of light, and v is the speed of light in material It is the change in velocity of a wave passing from one medium to another. related to optical density (i. e. high RI = high OD and vice versa) * define Snell’s Law: = = n? n? * identify the conditions necessary for total internal reflection with reference to the critical angle Total internal reflection occurs when the incidence angle is greater than the critical angle. * i. e. boundary totally reflects the waves, hence the wave never escapes the medium it is in Critical angle: – wave travelling from more dense to less dense – angle of incidence forms an angle of reflection of 90? the critical angle) * outline how total internal reflection is used in optical fibres Fibre-Optic Communication – optic fibres made of glass or plastic materials -An optical fibre consists of a core (made of material with higher RI/ is more optically dense) and a cladding – Light encoded with data is guided along the length of the fibre via total internal reflection until it reaches the other end where the information is extracted and decoded Advantages| How/ Why| large amount of data can be transmitted at any one time * suitable for transmitting information where straight line transmission is impossible * interferences by outside disturbances are minimised since light waves are confined within fibres * energy lost due to long distance transmission minimised| * by using a group of many fibres * light waves only travel in straight lines * light waves are confined within fibres * energy of light waves totally trapped with in core of fibres| . Electromagnetic waves have potential for future communication technologies and data storage technologies * identify types of communication data that are stored or transmitted in digital form * fibre optic communication * AM/FM radio broadcasting * mobile telephone calls * satellite communication

Philippine Saint : Saint Lorenzo Ruiz Essay

Lorenzo Ruiz Saint Lorenzo Ruiz (ca. 1600 – 29 September 1637), also known as Laurentius Ruiz de Manila or San Lorenzo Ruiz de Manila, is the firstFilipino saint venerated in the Roman Catholic Church; he is thus the protomartyr of the Philippines. He was killed for refusing to leave Japan and renounce his Roman Catholic beliefs during the persecution of Japanese Christians under the Tokugawa Shogunate in the 17th century. Saint Lorenzo is patron saint of, among others, the Philippines and Filipinos. Early life Lorenzo Ruiz was born in Binondo, Manila to a Chinese father and a Filipino mother who were bothCatholic. His father taught him Chinese while his mother taught him Tagalog. Ruiz served as an altar boy at the convent of Binondo church. After being educated by the Dominicanfriars for a few years, Ruiz earned the title of escribano (calligrapher) because of his skillful penmanship. He became a member of the Cofradia del Santissimo Rosario (Confraternity of the Most Holy Rosary). He married Rosario, a native, and they had two sons and a daughter. The Ruiz family lead a generally peaceful, religious and content life. In 1636, whilst working as a clerk for Binondo Church, Ruiz was falsely accused of killing a Spaniard. Ruiz sought asylum on board a ship with three Dominican priests: Saint Antonio Gonzalez; Saint Guillermo Courtet; Saint Miguel de Aozaraza, a Japanese priest; Saint Vicente Shiwozuka de la Cruz; and a lay leper Saint Lazaro of Kyoto. Ruiz and his companions left for Okinawa on 10 June 1636, with the aid of the Dominican fathers and Fr Giovanni Yago. Martyrdom The Tokugawa shogunate was persecuting Christians by the time Ruiz had arrived in Japan. The missionaries were arrested and thrown into prison, and after two years, they were transferred to Nagasaki to face trial by torture. He and his companions faced different types of torture. One of these was the insertion of needles inside their fingernails. On 27 September 1637, Ruiz and his companions were taken to the Nishizaka Hill, where they were tortured by being hung upside down a pit. This form of torture was known as tsurushi in Japanese or horca y hoya in Spanish. The method was supposed to be extremely painful: though the victim was bound, one hand is always left free so that victims may be able to signal that they recanted, and they would be freed. Ruiz refused to renounce Christianity and died from blood loss and suffocation. His body was cremated and his ashes thrown into the sea. According to Latin missionary accounts sent back to Manila, Ruiz declared these words upon his death: â€Å"Ego Catholicus sum et animo prompto paratoque pro Deo mortem obibo. Si mille vitas haberem, cunctas ei offerrem.† In English this may be rendered: â€Å"I am a Catholic and wholeheartedly do accept death for the Lord; If I had a thousand lives, all these I shall offer to Him.†

The Difficulties Which International Students Face

Introduction:This article is about the troubles which international pupils face, particularly for Asiatic pupils, including thought manners, larning attitudes and composing and showing manners. In malice of its publication day of the month, it is still helpful for us to understand the international students` state of affairs abroad. In the text, the writers argue all the issues are rooted in traditional civilization. In general, the authors` statements are sensible, but to some specific instances their positions are no longer suited. The grounds involve the development of instruction within the approximative 20 old ages and their restrictions of ocular positions. In this paper, ratings about every chief thought are presented. About the state of affairss which the authors` thoughts are non suited, some suggestions are indicated. As for the applicable statements, more groundss are provided to endorse up.Background:In this twenty-four hours and age, rather a few of Asiatic pupils go abr oad to analyze. However, there are some typical troubles they must get the better of because of their innate inclination. In Ballard and Clanchy`s research, the innate inclination wholly stem from oriental tradition, which is a typical point of view in the yesteryear. Some subsequent research taken by David Kember and Lyn Gow indicates that the issues result from the course of study and learning environment [ 1 ] . With the development of the instruction system in Asiatic states, the issues seem to be fade away during recent old ages. Asiatic international pupils become more and more familiar to western civilization, and they can get by with the assignment from their lector more swimmingly. This makes probes in past clip become unsuitable, so some updating studies are necessary to cover new state of affairss.Summary:The rubric of the article is â€Å"Cultural Variation: Troubles for Student Studying Abroad† . It is from a book named â€Å"Study Abroad: A Manual for Asian Stu dents† written by Ballard and Clanchy ( 1984 ) . In this article, the writers argue three chief troubles that Asian international pupils face in their perusal procedure. Further, the writers suggest Asiatic pupils seting their perusal manner for successful survey abroad. The first chief thought in the text is about fluctuations of thought manners. As the writers say, different thought and acquisition intents lead to different consequences, which stem from changing civilizations. A peculiar illustration of a Nipponese pupil who adjusted his intent and adapted his essay construction to run into his lecturer`s demand is utilized to back up the chief point. The fluctuation in larning attitudes is argued as the 2nd chief thought. In the authors` sentiment, different educational traditions create different larning attitudes. Then different larning attacks, including generative, analytical and bad, are presented in peculiar instruction degrees, although they are non separated wholly. The writers quote three Asiatic students` words and depict an Indonesian postgraduate`s state of affairs to endorse up their chief thought. The other chief thought concerns differences in authorship and presenting manners. Five distinguishable authorship forms, including English, Romance, Russian, Semitic and Oriental forms, are described in the text ( Kaplan 66: 1-20 ) . As indicated, a typical illustration of a Thailand pupil whose thesis was crossed out by his Australian supervisor suggests that different authorship manners differ widely. As the authors` suggestions, a more analytical and critical acquisition attack is expected for Asiatic international pupils to win in their survey.Critique ( general ) :By and large talking, the three chief troubles pointed out in this article are sensible. Although this article was published in 1984, the jobs still exist in current international pupils. The influence stemming from traditional civilization is important, which can non be eliminated within about twenty old ages. The thought and authorship manners which are trained during their studying procedure unnoticeably, still act upon international pupils. Something different, nevertheless, has happened in these twenty old ages. Internationalization has been an unstoppable inclination, for which relationships between states has become more and more closed. In the tendency, instruction internationalisation is a representative 1. Compared with the state of affairs in 1984, much more pupils go abroad to analyze, particularly for pupils from developing states. With the figure of international pupils increasing, abroad analyzing is no longer cryptic or unachievable. Most pupils who are ready to travel abroad can acquire much utile information from cyberspace and relevant agents. As the consequence of this, pupils are comparative familiar to the instruction environment abroad. Additionally, they normally can acquire experiential cognition from forthgoers. Therefore, they are able to set themselves to the outlooks of alien universities more easy, In add-on, a series of linguistic communication trials and record scrutinies are developed to gua rantee that pupils who are admitted by foreign universities can last in another state.Critique ( specific ) :As the statement above, the chief thoughts argued in this article is still sensible at present, nevertheless, the state of affairs has changed. So to a certain extent, the descriptions in the text are no longer suited. As the authors` averment, the fluctuations in believing manners stemming from traditional civilizations, made the Nipponese pupil fail in his first twelvemonth. Sing the beginning of fluctuations, it must be true, but this illustration should be an utmost one. Normally, the believing manner of oriental pupils is suggestive. They ever make attempt to avoid measuring subjects straight. When they are sing a subject, they normally think over the influence of background foremost. With the debuts of western educational civilization, nevertheless, most pupils are likely to compare the positions and measure the subject, although they may depict the background at first. In Chinese secondary school, many assignments are to reason the chief thoughts of prepared texts and measure these chief thoughts from your ain point of view. Through preparation like this pupils obtain the capableness to measure the comparative virtues. So the description as the text presented, merely may go on in utmost inst ance. With the increasing of the acquaintance to western thought form, the similar extreme instance should be less likely to go on. About the different acquisition schemes mentioned in this article, the writers claim that it is needed to develop a more analytical and critical acquisition manner for many Asiatic pupils. It should be a credible recommendation at that minute. However, in today`s school, non merely universities or colleges, but besides secondary schools, it is paid attending to analysis ability. Basically, the instructors and lectors encourage pupils to inquire inquiries and believe more deeply. In this manner, pupils are required non merely to retrieve the cognition points, but besides to understand how the procedure is traveling. In add-on, many universities in China set up financess to back up undergraduates to take experiments. Then, pupils who want to make some research in peculiar Fieldss are encouraged to use them. In this manner, students` bad capablenesss are cultivated. Furthermore, harmonizing to relevant research, there is no important difference between Australian and Asiatic pupils [ 2 ] . As reported, Asiatic pupils are non rote scholars. In other words, the generative acquisition scheme is non directed towards Asiatic pupils. Then, for Australian pupils, the best manner to larn is besides to retrieve and understand by bosom. For these grounds, the authors` averments about these three acquisition attacks are non in conformity with facts and suited to the development of instruction. Refering authorship manners, the writers cite Robert Kaplan`s theory to explicate the changing authorship manners successfully. For oriental authors, explicating the issue straight is a blunt manner which lacks of ideations. In their positions, a better manner to show their thoughts is to depict the background and the influence factors as deductions. The terminal consequences should be obtained by readers themselves. As the writers suggest, this indirect authorship attack is non suited to academic thesis in Australian universities. In western scholars` positions, the â€Å"relevant descriptions† are non relevant at all. It is a existent difference between western and eastern authorship accomplishments, while it is unneeded to discourse which 1 is more advanced. Expect from the fluctuations between different civilizations, the differences between each academic subject are besides mentioned in the text. In this twenty-four hours and age, more and more interdisciplines are develo ped, for which flexible authorship manners are required. Additionally, as a comparatively nonsubjective authorship manner, scientific discipline and technology articles should be paid more attending to pull readers.Decisions:In this paper, in connexion with every chief point mentioned in the original article, ratings are provided. By and large talking, the authors` chief thoughts are still applicable at present phase, although in this article there are some inside informations should be changed to accommodate modern instruction. When the writers are comparing with Asiatic students` plants and Australian lectures` outlooks, utmost illustrations are cited. This is the biggest failing, because it ignores the general position. Deductions of this article are that pupil who study abroad should larn how to set himself to the demand.Mentions:David Kember, Lyn Gow: A Challenge to Anecdotal Stereotype of the Asiatic Student, 1991.F. Sushila Niles: Cultural Differences in Learning Motivation a nd Learning Schemes: A Comparison of Overseas and Australian Students at an Australian University, 1995.

Pfizer- puffery or deception Essay Example | Topics and Well Written Essays - 250 words

Pfizer- puffery or deception - Essay Example However, this does not, in any way, mean that Dr. Robert Jarvik may make assertions about subjects that do relate to, but are not an intrinsic part of what he has discovered. Not all quality products are advertised through celebrities. Keeping that in view, Dr. Robert Jarvik’s claim about the potential utility of Lipitor in lowering cholesterol level is an attempt to decline the market value of other drugs that might be just as useful, if not more, in reducing cholesterol level. 2. Advertisements should be unbiased and rational, and the decision to buy should be left up to the customers to make. Instead of relying on Dr. Robert Jarvik’s name and fame, Pfizer should support its claims with scientific data and evidence. 3. It can not be said whether a company has crossed the line between puffery and outright deception unless one personally uses the product and experiences it. If the product comes up to users’ expectations, its company would have used puffery in adv ertising it. In the other case, there is outright deception in the advertisement.

Globalisation and Crime Essay Example | Topics and Well Written Essays - 5500 words

Globalisation and Crime - Essay Example This essay discusses that increased globalization has had influence on analytic approach that is given to the modern societal systems. The socio-economic and political effects of globalization constitute a topic for debate among scholars and analysts in the past couples of decades. Some analysts have pointed out that globalization does not promote the different aspects of development but rather contributes much to the current social, economic and political issues witnessed across the globe. In the article Trade liberalization did not develop the West, Alemiga points out that the current developed nations did not apply the policies of liberalized trade to come to their current state. Liberalized trade is a contributor to globalization as it is characterized by relaxed national protectionism and political realism concerning a country’s economy. In order to industrialize, these nations applied trade nationalism with protectionism and political realism, the trade across borders be ing subjected to heavy tariffs and other strict regulations. The countries were in war for world title and the weaker nations could be used anyhow by the stronger powers. The countries have since advocated for globalization after attaining some economic stability. The author points out several negative consequences that follow globalization that is in line with the observations of Aas. Aas observes that the lives and behaviours of individuals in the contemporary society are influenced a great deal by other individuals and social systems that are not within there local context. Improved communication mechanisms, liberalized trade, and movement of capital are among the key factors that have led to increased globalization (Imade, 2003; Aas, 2007, p.6). Individuals can watch and follow events that are going on in different parts of the world on their local context. As such, there is transfer of the cultural images, information, or ideas that would drive one into visiting these far-reach ing places. Consequently, one is prompted to adjust his/her social life to conform to the social life observed in other parts of the world that they believe to be conventional. Several issues arise with globalization that develops into crime. It is observed that even though the globalization process is inevitable, not every individual has the freedom to traverse various countries, save for the western societies (Aas, 2007, p.12). Globalization has not benefited every country or region equally (Imade, 2003). In a similar perspective, Alemiga (2012) reports that trade liberalization and subsequent globalization have contributed to social problems like food insecurity, violence, inflation, poverty, diseases and high rates of unemployment. It has also led to vicious practices like child trafficking, sex trafficking, violent crimes, and drug trafficking that are especially pronounced in the liberal societies like the United Kingdom and the US (Alemiga, 2012). The article focuses on globa l issues and succeeds in asserting that even though globalization is inevitable, it has remarkable drawbacks. Scotland is on the verge of seeking sovereignty and the policies that advocate for self-reliance are applicable to her. 2. Media representation of migration/immigration issues Immigration involves the movement of people from a different country into another country. Several reasons may force an individual to move from his or her country to reside permanently or temporarily in another country. Theorists and scholars with various views on immigration do agree that the recent wave of immigration that has been recorded and the perceived consequences makes it one of the most controversial issues in the current society (Martinez & Lee, 2000, p.487). Debate has erupted that immigration often brings negative

Women and science Essay Example | Topics and Well Written Essays - 3750 words

Women and science - Essay Example Ada Byron of the United Kingdom is hailed as the creator of the world’s first computer software programme. She was born in December 1815 to the famous English poet Lord George Gordon Byron and Lady Annabella Byron. There were 4 momentous events in her life that propelled Ada to scientific distinction.2 The first event was the split up between her parents. Lady Byron legally separated from her husband just 5 weeks after the birth of Ada. The court granted her sole custody of the child. Free from her husband’s influence, Lady Byron {who secretly dreaded that Ada would take up poetry like her father}, encouraged her daughter to become a mathematician and a scientist. The second and third momentous events were the advent of 2 persons into Ada’s life: Mary Somerville and Charles Babbage. Mary was a brilliant woman who translated the works of French mathematician and astronomer Pierre-Simon Laplace. Her translated texts were widely used at Cambridge. Mary motivated 17- year old Ada to study mathematics deeply. Ada met Charles Babbage during a dinner party in 1834. Charles was an English mathematician, philosopher and mechanical engineer. She was very interested in his pet project called the ‘Analytical Engine’ {which turned out to be the predecessor of the modern computer}. Charles’ contention that the Analytical Engine could be made not only to foresee but also act on such foresight ignited a spark in Ada Byron that would precipitate her to scientific fame.

International Joint Ventures Essay Example | Topics and Well Written Essays - 3250 words

International Joint Ventures - Essay Example Reasons for shifting to wholly owned subsidiaries rather than joint ventures Wholly owned subsidiaries and joint ventures Subsidiaries are those companies which are controlled by larger organizations like an MNC. It guarantees full operational ownership in the host country. A wholly owned subsidiary is one where the parent company owns 100% stocks of the subsidiary company. These are the expensive and complicated form of market entry. To establish a wholly owned subsidiary, a company can either enter into ventures with a local company or can establish a new venture on its own in the host country (Charles & Jones, 2007, p.290). A joint venture is a strategic move adopted by countries while setting up a business outside their home countries. In joint ventures a group of companies come together to conduct a specific business objective (Gutterman, 2002, p.1). Basically wholly owned subsidiaries and joint ventures differ on the aspect of ownership. While joint venture companies may be own ed by two or more companies wholly owned subsidiaries are owned by a single company which maintains complete control over it. In the light of the trade reforms and practices introduced by WTO, it becomes easy for a country to establish its subsidiary company in a foreign country where it would have its complete control over the daily activities. Many companies avoid in establishing joint ventures due to the complexities involved in the coordinating policies, decisions and execution with a different company. Let us take the example of the Chinese economy. The trade reforms have changed the Chinese economy drastically. China which previously had its monopoly over almost all of its trading activities by the state owned companies (Siyuan, 2007, p.22) has now adopted the WTO policies by becoming one of its member countries (International Joint Ventures in China after WTO Accession: Will Trust Relations Change?, 2005, p.5). It has opened its markets in agriculture to the world. With the e stablishment of WTO trade rules, baking industry in China underwent a sea change. Foreign banks that were not allowed to operate freely in the Chinese market found the opportunity to establish international wholly owned subsidiaries in the country that would be controlled by the foreign national companies. This was beneficial for the Chinese economy too as the foreign banks introduced new technology and which helped to increase the economic growth (Foreign banks develop in China after WTO entry, 2011). The relative advantages and disadvantages of the JVC versus the wholly-owned subsidiary as a means of market entry Trade reforms introduced by WTO- an idea After the establishment of WTO in 1995, many trade reforms were introduced across countries. This has extended to the Asian countries too like China and India. WTO introduced several reforms in the trading system. WTO has lowered trade barriers across nations through negotiation. This has resulted in reduced costs of production as the import cost gets lowered and the cost of the resources which became cheaper. This directly leads to the reduction in the cost of the consumer articles which reduces the cost of living for the people (World Trade Organization, 2008, p.6). Reducing trade barriers have also increased the income levels of the companies both at a personal level and also from its business perspective. This also contributes in increasing the world

Missouri Department of corrections rank among the highest in Research Paper

Missouri Department of corrections rank among the highest in recidivism - Research Paper Example By building cognitive skills the department has established the most effective intervention technique to address recidivism. The program aims at addressing issues such as decision making, successful relationships in the society and corrects thinking errors that result to criminal behaviors (Boehm, 2007). The cognitive behavioral program should target offenders’ attitude, anger, and beliefs. Peers, substance abuse, and they are more action oriented. These actions help the offender in replacing the negative actions and association with the new leant behaviors. A better prison education program is the most appropriate and recommended correction method for Missouri prison. The program should involve providing the inmates with education and skills that enable them to secure employment opportunities once they are out of prison. The state government should launch a program such as PERU (prison education revolutionary unit) that will ensure inmates acquire more skills in Automotive, Information Technology, Welding, Culinary Arts, and basic Engineering courses (Jackson & Lyons,  2007). The program will improve vocational education by availing highly trained, experienced, and skilled educationalists that will positively influence the lives of the prisoners. According to the studies by the University of Missouri, it was found that inmates who earned their General Educational Diploma Certificate (GED) in prison had a higher rate of getting employment and, consequently, less likely to repeated crime. The research showed a 33% decrease in the likel ihood of recidivism on the inmates who obtained a full-time job. Implementation of PERU will ensure that inmates acquire technical skills that will match the needs and preferences of the contemporary labor market and in a position to obtain employment. The PERU program will ominously improve prison vocational education and resolve the

Final Project Of Zirconium oxide Research Paper Example | Topics and Well Written Essays - 750 words

Final Project Of Zirconium oxide - Research Paper Example The flow chart shown below shows the process of Zirconium oxide production. The main raw material in the production of the nuclear-grade zirconium oxide is the zircon mineral (ZrSiO4) naturally occurring as zirconium sand. The zirconium sand consists of zirconium and hafnium whose properties are almost similar. Special separation techniques of precipitation, filtration and calcination are applied to separate the two products (Dhanaraj & Govindhan 444). The production of zirconium oxide is broken down into three simple steps; extraction of zirconium sand, removal of wastes (including hafnium) and conversion of the resulting compound into the finished product (zirconium oxide free from hafnium). The separation of zirconium and hafnium occurs at temperature ranges of 650-700 degree Celsius (Dhanaraj & Govindhan 444). The zirconium sand is mixed with K2SiF6. This converts the metal into K2ZrF6 which is soluble in water and K2HfF6. A sequential process of crystallization eliminates hafnium. The process results into pure form of K2ZrF6 which is ammonized to produce zirconium oxide. The production of 1kg of zirconia requires 0.7 kg of the zirconium metal that has to be extracted from the zirconium sand (Dhanaraj & Govindhan 444). The by-products obtained from the process of zirconia extraction are washed away in water to the sea. These elements are not harmful to the environment. The other byproducts are sold for utilization in other industries like the refineries of magnesium. The final stage of zirconium oxidation into zirconia requires the use of steam. This is carried out at high temperatures (Dhanaraj & Govindhan 444). The oxidation process is exothermic and yields substantial amounts of hydrogen. The equation for oxidation of zirconium is as shown. The production of zirconia utilizes energy in many forms. Electricity is used to heat up the reactors where separation of zirconium

Life and Work of a Famous Greek Thinker Essay Example | Topics and Well Written Essays - 750 words

Life and Work of a Famous Greek Thinker - Essay Example Aristotle was appointed the tutor to Alexander in 343 B.C (Williams 44). For three years he remained tutor to Alexander until the Prince turned 16. Not much is known of the relationship between Aristotle and Alexander, yet Alexander’s terrific career stands to be an apt testimony to the practicality of Aristotle’s philosophy. Aristotle resided in Athens in 335 B.C. to 323 B.C. It was in these 12 years that Aristotle wrote most of his works. However, after the death of Alexander, Aristotle had to flee from Athens to avoid persecution at the hands of Athenian rebels (Williams 53). As per some credible records, Aristotle died in 322 B.C (Williams 16). It is said that Aristotle wrote three treatises on ethics. However, two of them are today attributed to his disciples and it is the third one that is Nicomachean Ethics that is known to be written by Aristotle (Broadie 4). The views pertaining to ethics professed by Aristotle in this treatise present a good insight into the m indset of the mature and educated men of his age. In this treatise Aristotle lays out the principles by which the well behaved citizens need to conduct themselves. Till the late 17th century, Aristotle’s treatise on ethics had a great influence on the politics and statecraft and continued to be source of inspiration for the future scholars and statesmen (Broadie 5). One other treatise by Aristotle called Politics is regarded to be the very source of varied principles that held a great sway till the culmination of the Middle Ages (Weber 396). This treatise is not only a source of apt information regarding the ways of government in non-Hellenic States, but stood to be a pivotal instrument of defense of democracy in the times of Aristotle (Weber 396). The assumptions embedded in Politics not only were strongly entrenched in the Athens under Pericles, but the Aristotelian concept of governance by cultured gentlemen had its reverberations in Renaissance Age, till it was modified b y French Revolution and industrialism (Weber 397). Though Aristotle’s genius greatly influenced many aspects of the Greek civic life and the statecraft in the following ages, it was in the sphere of Logic that it reached its zenith (Ackrill 79). Aristotle’s dominance in logic flourished right through the Middle Ages, till he was accorded a dominion in the area of metaphysics by the Christian philosophers in the 13th century (Ackrill 80). Though Aristotle strain of Logic is today quiet antiquated, still many Catholic theologians, scientists and mathematicians prefer to adhere to his system (Ackrill 84). Aristotle’s doctrine of syllogism is the most important contribution by Aristotle to the field of Logic (Ackrill 80). When considering the contribution of Aristotle to modern sciences, two of his other works that are Physics and On the Heavens do need to be mentioned (Judson 19). These works greatly influenced the world of science in the Greek times and their domi nation continued till the times of Galileo (Judson 19). Aristotle’s views regarding planets and stars though were immensely influenced by the Pagan beliefs of his times were actually well received and accepted by the medieval Christians. Aristotle’s philosophy had a significant impact on both the Islamic and Western philosophy (Ackrill 9). Aristotle not only studied and meticulously delved on almost every subject and discipline existing in his times, but in fact made a significant contribution to the existing

Intro speech Essay Example for Free

Intro speech Essay Earth Hour is a worldwide movement for the planet organized by the World Wide Fund for Nature (WWF). Earth Hour engages a massive mainstream community on a broad range of environmental issues. It was first famously started as a lights-off event in Sydney, Australia in 2007. Since then it has grown to engage more than 7000 cities and towns worldwide, and the one-hour event continues to remain the key driver of the now larger movement. The event is held worldwide and held towards the end of March annually, encouraging individuals, communities, households and businesses to turn off their non-essential lights for one hour as a symbol for their commitment to the planet. Earth Hour 2013 was celebrated on March 23, 2013. Earth Hour 2014 is scheduled for Saturday, March 29, from 8:30 p.m. to 9:30 p.m. during participants local time. -2004: in Sydney not so famous 2007: Become well known -2008: Earth Hour 2008 was held internationally on March 29, 2008 from 8 p.m. to 9 p.m. local time, marking the first anniversary of the event. With 35 countries around the world participating as official flagship cities and over 400 cities also supporting, Earth Hour 2008 was celebrated on all seven continents. Landmarks all around the world turned off their non-essential lighting for Earth Hour, including the Sydney Opera House (Sydney, Australia), Empire State Building (New York City, USA), (examples) 2008 participants[edit] Earth Hour 2008 included 26 major cities worldwide and 300 smaller towns shutting off their lights.[6] 2009: Earth Hour 2009 was from 8:30 p.m. to 9:30 p.m. local time, March 28, 2009. 88 countries and 4,159 cities participated in Earth Hour 2009,[37] ten times more cities than Earth Hour 2008 had (2008 saw 400 cities participate).[38 96 countries on 6 continents participated in the event in 2009. 2010: Earth Hour 2010 was held from 8:30 p.m. to 9:30 p.m. local time, 27 March.[49] In Israel, the hour was held on 22 April.[50] Earth Hour 2010 was reportedly the biggest Earth Hour yet, aiming to garner more than the one billion participant goal of 2009s Earth Hour.[51] 126 countries participated in Earth Hour 2010.[52] 2011: Earth Hour 2011 was the biggest year in the campaigns five year history, reaffirming it as the largest ever voluntary action for the environment. It took place in a record 5,251 cities and towns in 135 countries and territories in all seven continents.[59] It had an estimated reach of 1.8 billion people across the globe. In addition to this, the campaigns digital footprint grew to 91 million. 2012: Earth Hour 2012 was observed on 31 March 2012 from 8:30 p.m. to 9:30 p.m. (participants local time).[66] It took place in more than 7000 cities and towns across 152 countries and territories, making it the biggest growth year for the campaign since 2009. In February, Earth Hour launched its 2012 campaign I Will If You Will, with the intention of engaging its growing global community to go beyond the hour and coordinate efforts publicly through Facebook, Twitter, Google+ and e-mail. Using a dedicated YouTube platform,[67] IWIYW asks Earth Hours digital community to inspire people from all corners of the globe to take sustainability actions, and to share their commitment to the environment with their own social media networks. -2013: Earth Hour 2013 was held across the world on Saturday, March 23 at 8:30 p.m. to 9:30 p.m. local time[71] to avoid taking place after European Summer Time begins, ensuring the greatest impact of the lights off event. It is also to avoid coinciding wi th Western Christianity Holy Saturday, which falls on March 30 of that year. 2014: Earth Hour 2014 announced the date will schedule on March 29 as seen on the 2013 Earth Hour highlights â€Å"I will if you will† Campaign: I Will If You Will (IWIYW) is an Earth Hour campaign to encourage positive  action for the environment. The actions required are up to the individual or group. They could be big or small and it might be a simple lifestyle change or perhaps something that leads to political change. The campaign intends for people to become the inspiration to their friends, family, colleagues and communities by sharing what they’re willing to do to protect the planet. Challenges can be created or accepted on Earth Hours YouTube channel. Many organization supports and celebrity endorsement The Earth Hour Global FAQ page states: Earth Hour does not purport to be an energy/carbon reduction exercise, it is a symbolic action. Therefore, we do not engage in the measurement of energy/carbon reduction levels for the hour itself. Earth Hour is an initiative to encourage individuals, businesses and governments around the world to take accountability for their ecological footprint and engage in dialogue and resource exchange that provides real solutions to our environmental challenges. Participation in Earth Hour symbolises a commitment to change beyond the hour.[86]

Modern History Essay on USA Civil Rights Movement Essay Example for Free

Modern History Essay on USA Civil Rights Movement Essay In the USA from 1865, when slavery was abolished and African American people where supposedly considered separate but equal by the constitution, to the 1960s, when the African Americans where actually considered equal, segregation practises where being endorsed throughout the USA. Segregation was the practice of separating the white Americans and the African Americans. Segregation occurred when the white Americans continued their upper status on the previously enslaved African Americans, therefore maintaining the African Americans status of repression. However throughout the later 1950s to 1960s American went through the Civil Rights Movement, in which the African Americans aimed for a desegregated society that maintained equality. Throughout the Civil Rights Movement many non-violent protests were held creating direct confrontation urging changes to be made within segregated social areas. Therefore non-violent direct confrontation was the successful means which helped to end segregation practises in the USA. Non-violence was the concept of holding a protest that was peaceful and did not retaliate to violence that was likely to be present. The most successful aspect of these protests was direct confrontation. This was when the African Americans would directly break one of the rules in public segregation, causing direct friction within the segregated society, to push the boundaries in which African American people where confined. The confrontation along with the friction created by these peaceful protests predominantly concluded with change due to the persistence of the African Americans. Despite the escalating violence that was waiting at the majority of the African Americans protests they continued, fighting for their civil rights as humans. One of the most supported organisations for African Americans, by not only African Americans themselves but also white Americans in support of desegregation, was the National Association for the Advancement of Coloured People (the NAACP). As well one of the most historically supported leaders of the NAACP, Martin Luther King’s virtues for desegregation was non-violent protesting. The increasing levels of support for the NAACP helped create mass protest to which those higher up within the government would be forced into acting upon to eradicate the chance of the protest escalating into a violent scene caused by the white Americans. Therefore it is clearly evident that non-violent, direct confrontation was a marginally successful approach to the Civil Rights Movement. Throughout the Civil Rights Movement the media played a major role in the method of non-violence in the ending of segregation. Although the African Americans had a great dedication to their protests they would not have been as greatly supported through these protests without the media. Television station camera men, reporters and photographers, where able to capture the violence and abuse directed at the African American’s, thus demonstrating the resilience of the protesters. Furthermore showing the general American public that in these situations of protests the aggressors where the white Americans and the treatment of the African Americans were unjust. Not only was this evidence of repression upon the African Americans displayed amongst the American media but also global media. Therefore effecting America’s superior reputation amidst the Cold War, giving the current enemy reason as to why capitalism was potentially failing and to their acquainted supporters and potential supporters. This global recognition for a Civil Rights struggle gave motivation to politics to act upon this situation to maintain their global reputation. Therefore the recognition of the African Americans repression and unjust treatment was national and globally recognised, thus gaining support from white Americans after this realisation. Hence the global realisation of this unjust treatment emphasised the need of social change to the government therefore giving some explanation as to the equality that becomes desegregation. Many of the non-violent protests African Americans undertook where simple acts however they caused extravagant aggravation due to racist view that the superior percentage of Americans had grown up amongst. One of the protests conducted by seven African Americans and six white Americans was abruptly ended when bus companies refused to carry them on further through their journey as they were confronted with a brutal mob that violently physically abused them and destroyed the busses that carried them. This protest was the Freedom Rides, protesting to desegregate bus terminals and associated facilities. However other protest groups pushed forward with the Freedom Rides continuing the journey and withstanding the violence until significant action was taken by the government. The desegregation for bus terminal and associated facilities was finally arranged after a major uprise in support for these freedom Riders. Much alike the Freedom Rides, Lunch Counter Sit-Ins were a peaceful protest than ended the desegregation of lunch counters. It started with the simple act on February 4th with of four African American college students sitting at a Woolworths lunch counter until the stores closing after being refused serves due to their race. This protest escalated in size and expanded rapidly due to the support it received. Over 50,000 people participated in one or more of the sit in’s within a year in over 15 different states and various cities. Due to the size and direct confrontation of this protest, abuse and violence erupted in many of the Sit-Ins encouraging the government to desegregate to maintain the countries reputation. Thus although many of the protests conducted where simple acts of rebellion for the African Americans the persistence of them where found confronting to the white Americans therefore resulting in change. Further on during the Civil Rights Movement it became apparent that many other organisations for African Americans gained further support, this including the Muslim religion and in particular those surrounding Malcolm X. Although Malcolm X’s and Martin Luther King’s values for the equality of African Americans differ, their main aim was equality with the white Americans. Malcolm X supported maintaining the separation of the races where as King supported the integration of the races in an equal society. Malcolm X was an activist of the Muslim religion; he focused in eradicating the repression on the African Americans that was being held upon by the white Americans, much alike Martin Luther King. However they differ as King’s protests were supporting the integration of the races and living peacefully together, were as Malcolm believed in the maintaining of the separation of the races. However as history has proven within American prior to the late 1950s that separate is not equal, as much as that may be the aim. Hence it becomes evident that Malcolm X’s protests didn’t succeed in the equality of African American, whereas Martin Luther King’s non-violent protests to integrate proved very successful. Therefore throughout the Civil Rights Movement many different protests where held, and many different organisations where supported however the most successfully was non-violence. These non-violence tactics as stated earlier, where the most effective due to the media coverage, persistence of the large quantity and direct confrontation. Without these aspects the non-violence practices for ending segregation within the USA wold not have been as nearly as efficient. Thus using non-violent methods as a means for ending segregation within the USA proved to be highly successful.

Identifying Problems When Obtaining Population Parameters

Identifying Problems When Obtaining Population Parameters We estimate population parameters, such as the mean, based on the sample statistics. It is difficult to get a precise value or point estimation of these figures. A more practical and informative approach is to find a range of values in which we expect the population parameters will fall. Such a range of values is called a confidence interval. 1. CONFIDENCE INTERVAL Definition The confidence interval is a range of values constructed from sample data so that the population parameter is likely to occur within that range at a specified probability. The specified probability is called the level of confidence. The shape of the probability distribution of the sample mean allows us to specify an interval of specific probability that the population mean,  µ, will fall into. 1.1 Large Sample Or Standard Deviation Is Known Case 1: The standard deviation à Ã†â€™ is known; or It is a large sample (i.e. at least 30 observations). The Central Limit Theorem states that the sampling distribution of the sample means is approximately normal. We can use the tables in the Appendix to find the appropriate Z value. Key Points The standard normal distribution allows us to draw the following conclusions: 68% of the sample means will be within 1 standard deviations of the population mean,  µ. 95% of the sample means will be within 1.96 standard deviations of the population mean,  µ. 99% of the sample means will lie within 2.58 standard deviations of the population mean. These intervals are called the confidence interval. The standard deviation above (i.e. the standard error) is referring to the standard deviation of the sampling distribution of the sample mean. Locating 0.475 in the body of the table, read the corresponding row and column values, the value is 1.96. Thus, the probability of finding a Z value between 0 and 1.96 is 0.475. Likewise, the probability of being in the interval between -1.96 and 0 is also 0.475. When we combine these two, the probability of being in the interval of -1.96 to 1.96 is therefore 0.95. 1.1.1 How do you compute a 95% confidence interval? Assume our research involves the annual starting salary of business graduates in a local university. The sample mean is $39,000, while the standard deviation of the sample mean is $250. Assume our sample contains more than 30 observations. The 95% confidence interval is between $38,510 and $39,490. Found by $39,000 +/- 1.96($250) In most situations, the population standard deviation is not available, so we estimate it as follows: (Standard Error) Conclusions: 95% confidence interval 99% confidence interval Confidence interval for the population mean (n > 30) Z depends on confidence level Example 1 The Hong Kong Tourist Association wishes to have information on the mean annual income of tour guides. A random sample of 150 tour guides reveals a sample mean of $45,420. The standard deviation of this sample is $2,050. The association would like answers to the following questions: (a) What is the population mean? The best estimate of the unknown population value is the corresponding sample statistic. The sample mean of $45,420 is a point estimate of the unknown population mean. (b) What is a reasonable range of values for population mean? The Association decides to use the 95% level of confidence. To determine the corresponding confidence interval, we use the formula: The endpoints would be $45,169 and $45,671 and they are called confidence limits. We could expect about 95% of these confidence intervals contain the population mean. About 5% of the intervals would not contain the population mean annual income, i.e. the  µ. Figure 2 Probability distribution of population mean 1.2 Small Sample Or Standard Deviation Is Unknown Case 2: The sample is small (i.e. less than 30 observations) or, the population standard deviation is not known. The correct statistical procedure is to replace the standard normal distribution with the t distribution. The t distribution is a continuous distribution with many similarities to the standard normal distribution. 1.2.1 Standard normal distribution versus t distribution Figure 3 Z distribution versus t distribution The t distribution is flatter and more spread out than the standard normal distribution. The standard deviation of the t distribution is larger than the normal distribution. Confidence interval for a sample with unknown population mean, à Ã†â€™. The confidence interval is Assume the sample is from a normal population. Estimate the population standard deviation (à Ã†â€™) with the sample standard deviation (s). Use t distribution rather than the Z distribution. Example 2 A shoe maker wants to investigate the useful life of his products. A sample of 10 pairs of shoes that had been walked for 50,000 km showed a sample mean of 0.32 inch of sole remaining with a standard deviation of 0.09 cm. Constructing a 95% confidence interval for the population mean, would it be reasonable for the manufacturer to conclude that after 50,000 km the population mean amount of sole remaining is 0.3 cm? Assume the population distribution is normal. The sample standard deviation is 0.09 cm. There are only 10 observations and hence, we use t distribution Estimation: = 0.32, s = 0.09, and n = 10. Step 1: Locate t by moving across the row for the level of confidence required (i.e. 95%). Step 2: The column on the left margin is identified as df. This refers to the number of degrees of freedom. The number of degree of freedom is the number of observations in the sample minus the number of samples, written n-1.(i.e. 10-1=9). Step 3: Confidence Interval = The endpoints of the confidence interval are 0.256 and 0.384. Step 4: Interpretation the manufacturer can be reasonably sure (95% confident) that the mean remaining tread depth is between 0.256 and 0.384 cm. Because 0.3 is in this interval, it is possible that the mean of the population is 0.3. 2. CHOOSING AN APPROPRIATE SAMPLE SIZE The necessary sample size depends on three factors: Level of confidence wanted: To increase level of confidence, increase n. Margin of error the researcher will tolerate: To reduce allowable error, increase n. Variability in the population being studied: For a more widely dispersed sample, increase n. We can express the interaction among these three factors and the sample size in the following formula: Sample size for estimating the population mean, Note: n: Sample size Z: Standard normal value S: Estimate of population standard deviation E: Maximum allowable error Example 3 An accounting student wants to know the mean amount that independent directors of small companies earn per month as remuneration for being a director. The error in estimating the mean is to be less than $100 with a 95% level of confidence. The student found a report by the government that estimated the standard deviation to be $1000. What is the required sample size? Maximum allowable error, E, is $100. Value of Z for a 95% level of confidence is 1.96, and the estimate of the standard deviation is $1000. Substitute into , we get n = [ (1.96) (1000) ] 2 = 19.62 = 384.16 100 The sample of 385 is required to meet the requirements. If the students want to increase the level of confidence, e.g. 99%, this requires a larger sample. Z = 2.58, so n = [ (2.58) (1000) ] 2 = 25.82 = 665.64 100 Sample = 666 3. WHAT IS A HYPOTHESIS? Definitions Hypothesis is a statement about a population parameter developed for the purpose of testing. Hypothesis testing is a procedure based on sample evidence and probability theory to determine whether the hypothesis is a reasonable statement. In statistical analysis, we always make a claim about the population parameters, i.e. a hypothesis. We collect data and then use the data to test the assertion. 4.1 Five-Step Procedure For Testing A Hypothesis Figure 4 How to test a hypothesis 4.1.1 Step 1: State null hypothesis (H0) and alternative hypothesis (H1) The first step is to state the hypothesis being tested. It is called the null hypothesis. We either reject or fail to reject the null hypothesis. Failing to reject the null hypothesis does not prove that H0 is true. The null hypothesis is a statement that is not rejected unless our sample data provide convincing evidence that it is false. The alternative hypothesis is a statement that is accepted if the sample data provide sufficient evidence that the null hypothesis is false. Example 4 A journal has disclosed that the mean age of commercial helicopters is 15 years. A statistical test of this statement would first need to determine the null and the alternate hypotheses. The null hypothesis represents the current or reported condition. It is written H0:  µ = 15. The alternate hypothesis is that the statement is not true, i.e. H1:  µ à ¢Ã¢â‚¬ °Ã‚   15. 4.1.2 Step 2: Select a level of significance The level of significance is the probability of rejecting the null hypothesis when it is true. A decision is made to use the 5% level, 1% level, 10% level or any other level between 0 and 1. We must decide on the level of significance before formulating a decision rule and collecting sample data. Type I error: Rejecting the null hypothesis, H0, when it is true. Type II error: Accepting the null hypothesis when it is false. Example 5 Suppose AA Watch Ltd has informed bracelet suppliers to bid for contract on the supply of a large amount of bracelets. Suppliers with the lowest bid will be awarded a sizable contract. Suppose the contract specifies that the watch producers quality-assurance department will take samples of the shipment. H0: The shipment of bracelet contains 6% or less substandard bracelets. H1: More than 6% of the boards are defective. A sample of 50 bracelets received August 2 from BB Metals Ltd revealed that four bracelets, or 8%, were substandard. The shipment was rejected because it exceeded the maximum of 6% substandard bracelets. If the shipment was actually substandard, the decision to return the bracelets to the supplier was correct. However, suppose the four substandard bracelets selected in the sample of 50 were the only substandard bracelets in the shipment of 4,000 bracelets. Then only 1/10 of 1% were defective (4/4000 = 0.001). In that case, less than 6% of the entire shipment was substandard and rejecting the shipment was an error. We may have rejected the null hypothesis that the shipment was not substandard when we should have accepted the null hypothesis. By rejecting a true null hypothesis, we committed a Type I error. AA Watch Ltd would commit a Type II error if, unknown to the company an incoming shipment of bracelet from BB Metals Ltd contained 15% substandard bracelets, yet the shipment was accepted. How could this happen? Suppose two out of the 50 bracelets in the sample (4%) tested were substandard, and 48 out of the 50 were good bracelets. As the sample contained less than 6% substandard bracelets, the shipment was accepted but it could be purely by chance that the 48 good bracelets selected in the sample were the only acceptable ones in the entire shipment. In conclusion: Null Hypothesis Accepts H0 Rejects H0 H0 is true Correct decision Type I error H0 is false Type II error Correct decision 4.1.3 Step 3: Select the test statistics There are many test statistics. In this chapter, we use both Z and t as the test statistic. Definition A test statistic is a value, determined from sample information, used to determine whether to reject the null hypothesis. In hypothesis testing for the mean ( µ) when à Ã†â€™ is known or the sample size is large, the test statistic Z is computed by: The Z value is based on the sampling distribution of , which follows the normal distribution when the sample is reasonably large with a mean () equal to  µ, and a standard deviation , which is equal to . We can thus determine whether the difference between and  µ is statistically significant by finding the number of standard deviations is from  µ, using the formula above. 4.1.4 Step 4: Formulate the decision rule Definition A decision rule is a statement of the specific conditions under which the null hypothesis is rejected and the conditions under which it is not rejected. The region or area of rejection defines the location of all those values that are so large or so small that the probability of their occurrence under a true null hypothesis is rather remote. The area where the null hypothesis is not rejected is to the left of 1.65. The area of rejection is to the right of 1.65. A one-tailed test is being applied. The 0.05 level of significance was chosen. The sampling distribution of the statistic Z is normally distributed. The value 1.65 separates the regions where the null hypothesis is rejected and where it is not rejected. The value 1.65 is the critical value. The critical value is the dividing point between the region where the null hypothesis is rejected and the region where it is not rejected. Figure 5 Area of rejection for the null hypothesis 4.1.5 Step 5: Make a decision The final step in hypothesis testing is computing the test statistic, comparing it to the critical value, and making a decision to reject or not to reject the null hypothesis. Based on the information, Z is computed to be 2.34, the null hypothesis is rejected at the 0.05 level of significance. The decision to reject H0 was made because 2.34 lies in the region of rejection, i.e. beyond 1.65. We would reject the null hypothesis, reasoning that it is highly improbable that a computed Z value this large is due to sampling variation. Had the computed value been 1.65 or less, say 0.71, the null hypothesis would not be rejected. It would be reasoned that such a small computed value could be attributed to chance. Example 6 A large car leasing company wants to buy tires that average about 60,000 km of wear under normal usage. The company will, therefore, reject a shipment of tires if tests reveal that the life of the tires is significantly below 60,000 km on the average. The company would be glad to accept a shipment if the mean life is greater than 60,000 km. However, it is more concerned that it will have sample evidence to conclude that the tires will average less than 60,000 km of useful life. Thus, the test is set up to satisfy the concern of the car leasers that the mean life of the tires is less than 60,000 km. The null and alternate hypotheses in this case are written H0:  µ à ¢Ã¢â‚¬ °Ã‚ ¥ 60,000 and H1:  µ In this problem, the rejection region is pointing to the left, and is therefore in the left tail. Summary: If H1 states a direction, we use a one-tailed test. If no direction is specified in the alternate hypothesis, we use a two-tailed test. Figure 6 One-tailed test 5. TESTING FOR POPULATION MEAN WITH KNOWN POPULATION STANDARD DEVIATION 5.1 Two-tailed Test ABC Watch Ltd manufactures luxury watches at several plants in Europe. The weekly output of the Model A33 watch at the Swiss Plant is normally distributed, with a mean of 200 and a standard deviation of 16. Recently, because of market expansion, mechanisation has been introduced and employees laid off. The CEO would like to investigate whether there has been a change in the weekly production of the Model A33 watch. To put it another way, is the mean output at Swiss Plant different from 200 at the 0.01 significant levels? 5.1.1 Step 1: State null hypothesis and alternate hypothesis The null hypothesis is The population mean is 200. H0:  µ = 200. The alternate hypothesis is The mean is different from 200. H1:  µ à ¢Ã¢â‚¬ °Ã‚   200. 5.1.2 Step 2: Select the level of significance The 0.01 level of significance is used. This is ÃŽÂ ±, the probability of committing a Type I error, and it is the probability of rejecting a true null hypothesis. 5.1.3 Step 3: Select the test statistic The test statistic for the mean of a large sample is Z. Figure 7 Normalise the standard deviation 5.1.4 Step 4: Formulate the decision rule The decision rule is formulated by finding the critical values of Z from Appendix D. Since this is a two-tailed test, half of 0.01, or 0.005, is placed in each tail. The area where H0 is not rejected, i.e. area between the two tails, is 0.99. Appendix D is based on half of the area under the curve, or 0.5. Then 0.5 0.005 is 0.495, so 0.495 is the area between 0 and the critical value. The value nearest to 0.495 is 0.4951. Then read the critical value in the row and column corresponding to 0.4951. It is 2.58. Decision rule: Reject H0 if the computed Z value is not between -2.58 and +2.58. Do not reject H0 if Z falls between -2.58 and +2.58. Figure 8 Two-tailed test 5.1.5 Make a decision and interpret the result Compute Z and apply the decision rule to decide whether to reject H0. The mean number of watches produced weekly for last year is 203.5. The standard deviation of the population is 16 watches. Because 1.55 does not fall in the rejection region, H0 is not rejected. We conclude that the population mean is not different from 200. So we would report to the CEO that the sample evidence does not show that the production rate at the Swiss plant has changed from 200 per week. The difference of 3.5 units between the historical weekly production rate and the mean number of watches produced weekly for last year can reasonably be attributed to sampling error. Figure 9 Rejection regions for the two-tailed test So did we prove that production rate is still 200 per week? No! Failing to disprove the hypothesis that the population mean is 200 is not the same thing as proving it to be true. 5.2 P-value In Hypothesis Testing Definition P-value is the probability of observing a sample value as extreme as, or more extreme than, the value observed, given that the null hypothesis is true. How confident are we in rejecting the null hypothesis? This approach reports the probability of getting a value of the test statistic at least as extreme as the value actually obtained. This process compares the probability called the P-value, with the significant level. If the P-value If the P-value > significant level, H0 is not rejected. A very small P-value, such as 0.0001, indicates that there is little likelihood the H0 is true. If a P-value of 0.2033 means that H0 is not rejected, there is little likelihood that it is false. Figure 10 P-value P-value Interpretation Less than 0.1 Some evidence that H0 is not true Less than 0.05 Strong evidence that H0 is not true Less than 0.01 Very strong evidence that H0 is not true Less than 0.001 Extremely strong evidence that H0 is not true The probability of finding a Z value of 1.55 or more is 0.0606, found by 0.5 0.4394. The probability of obtaining an greater than 203.5 if  µ = 200 is 0.0606. To compute the P-value, we need to be concerned with the region less than -1.55 as well as the values greater than 1.55. The two-tailed P-value is 0.1212, found by 2(0.0606). The P-value of 0.1212 is greater than the significance level of 0.01, so H0 is not rejected. Chapter Review The Central Limit Theorem states that the sampling distribution of the sample means is approximately normal. The standard error refers to the standard deviation of the sampling distribution of the sample mean. We use t distribution when the sample is less than 30 observations and the population standard deviation is not known. The necessary sample size depends on 1) level of confidence wanted ; 2) margin of error the researcher will tolerate; 3)variability in the population.   By rejecting a true null hypothesis, we committed a Type I error. We would reject the null hypothesis when it is highly improbable that a computed Z value this large is due to sampling variation. What You Need To Know Confidence interval: A range of values constructed from sample data so that the population parameter is likely to occur within that range at a specified probability. Hypothesis: A statement about a population parameter developed for the purpose of testing. Hypothesis testing: A procedure based on sample evidence and probability theory to determine whether the hypothesis is a reasonable statement. Critical value: The dividing point between the region where the null hypothesis is rejected and the region where it is not rejected. P-value: The probability of observing a sample value as extreme as, or more extreme than, the value observed, given that the null hypothesis is true. Work Them Out 1. The average number of days in outdoors assignments per year for salespeople employed by an electronic wholesaler needs to be estimated with a 0.90 degree of confidence. In a small sample, the mean was 150 days and the standard deviation was 14 days. If the population mean is estimated within two days, how many salespeople should be interviewed? A 134 B 152 C 111 D 120 2. A random sample of 85 staff of managerial grade revealed that a person spent an average of 6.5 years on the job before being promoted. The standard deviation of the sample was 1.7 years. Using the 0.95 degree of confidence, what is the confidence interval for the population mean? A 6.19 and 6.99 B 6.15 and 7.15 C 6.14 and 6.86 D 6.19 and 7.19 3. The mean weight of lorries travelling on a particular highway is not known. A state highway authority needs an estimate of the mean. A random sample of 49 lorries was selected and finds the mean is 15.8 tons, with a standard deviation of 3.8 tons. What is the 95 per cent interval for the population mean? A 14.7 and 16.9 B 14.2 and 16.6 C 14.0 and 18.0 D 16.1 and 18.1 4. A bank wants to estimate the mean balances owed by platinum Visa card holders. The population standard deviation is estimated to be $300. If a 98% confidence interval is used and an interval of $75 is desired, how many platinum cardholders should be taken into sample? A 84 B 82 C 62 D 87 5. A sample of 20 is selected from the population. To determine the appropriate critical t-value, what number of degrees of freedom should be used? A 20 B 19 C 23 D 27 6. If the null hypothesis that two means are equal is true, where will 97% of the computed z-values lie between? A  ± 2.58 B  ± 2.38 C  ± 2.17 D  ± 1.68 7. Suppose we are testing the difference between two proportions at the 0.05 level of significance. If the computed z is -1.57, what is our decision? A Reject the null hypothesis B Do not reject the null hypothesis C Review the sample D Own judgment 8. The net weights of a sample of bottles filled by a machine manufactured by Dame, and the net weights of a sample filled by a similar machine manufactured by Putne Inc, are (in grams): Dame: 5, 8, 7, 6, 9 and 7 Putne: 8, 10, 7, 11, 9, 12, 14 and 9 Testing the claim at the 0.05 level that the mean weight of the bottles filled by the Putne machine is greater than the mean weight of the bottles filled by the Dame machine, what is the critical value? A 2.215 B 2.175 C 1.782 D 1.682 9. Which of the following conditions must be met to conduct a test for the difference in two sample means? A Data must be of interval scale B Normal distribution for the two populations C Same variances in the two populations D All the above are correct 10. Take two independent samples from two populations in order to determine if a statistical difference on the mean exists. The number for the first sample and the number in the second sample are 15 and 12 respectively. What is the degree of freedom associated with the critical value? A 24 B 25 C 26 D 27 SHORT QUESTIONS A consumer group would like to estimate the mean monthly water charge for a single family house in June within $5 using a 99% level of confidence. Similar research has found that the standard deviation is estimated to be $25.00. What would be the sample size? The manager of the Kingsway Mall wants to estimate the mean amount spent per shopping visit by customers. A sample of 20 customers reveals the following amounts spent. $48 $42 $46 $51 $23 $41 $54 $37 $52 $48 $50 $46 $61 $61 $49 $61 $51 $52 $58 $43 What is the best estimate of the population mean? Determine a 99 per cent confidence interval. Interpret the result. Would it be reasonable to conclude that the population mean is $50? What about $60? ESSAY QUESTION 1. ABC Film Ltd knows that a certain favourite movie ran an average of 84 days, and the corresponding standard deviation was 10 days. The manager of New Westminster district was interested in comparing the movies popularity in his region with that in all of Canadas other theatres. He randomly selected 70 theatres in his region and found that they showed the movie for an average of 82 days. (a) State appropriate hypotheses for testing whether there was a significant difference in the length of the pictures run between theatres in the New Westminster district and all of Canadas other theatres. (b) Test these hypotheses at a 1% significance level.

Communism Essay -- Communism Essays

I  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Introduction Communism: A theory and system of social and political organization that was a major force in world politics for much of the 20th century. As a political movement, communism sought to overthrow capitalism through a workers’ revolution and establish a system in which property is owned by the community as a whole rather than by individuals. In theory, communism would create a classless society of abundance and freedom, in which all people enjoy equal social and economic status. In practice, communist regimes have taken the form of coercive, authoritarian governments that cared little for the plight of the working class and sought above all else to preserve their own hold on power. The idea of a society based on common ownership of property and wealth stretches far back in Western thought. In its modern form, communism grew out of the socialist movement of 19th-century Europe. At that time, Europe was undergoing rapid industrialization and social change. As the Industrial Revolution advanced, socialist critics blamed capitalism for creating a new class of poor, urban factory workers who labored under harsh conditions, and for widening the gulf between rich and poor. Foremost among these critics were the German philosopher Karl Marx and his associate Friedrich Engels. Like other socialists, they sought an end to capitalism and the exploitation of workers. But whereas some reformers favored peaceful, longer-term social transformation, Marx and Engels believed that violent revolution was all but inevitable; in fact, they thought it was â€Å"predicted by the scientific laws of history.† They called their theory â€Å"scientific socialism,† or communism. In the last half of the 19th century the terms socialism and communism were often used interchangeably. Ho wever, Marx and Engels came to see socialism as merely an intermediate stage of society in which most industry and property were owned in common but some class differences remained. They reserved the term communism for a final stage of society in which class differences had disappeared, people lived in harmony, and government was no longer needed. The meaning of the word communism shifted after 1917, when Vladimir Lenin and his Bolshevik Party seized power in Russia. The Bolsheviks changed their name to the Communist Party and installed a repress... ...that lacked the preconditions he and Engels considered essential, namely capitalism and a mature industrial economy. The first of these countries was Russia, a huge, poor, relatively backward nation that was just beginning to acquire an industrial base. IV  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Communism in the Soviet Union Communism as a concrete social and political system made its first appearance in the Union of Soviet Socialist Republics, the state erected by the victors of the October Revolution in Russia in 1917. Soviet communism took some of the core notions of Marxism to an extreme, realizing them through a tyrannical political structure. Within a decade, the Soviet dictatorship, having eradicated all dissent, unleashed an industrialization drive premised on near-total state control of physical and human resources. Authoritarianism reached its zenith during the long reign of Soviet leader Joseph Stalin. The limited reforms undertaken after his death in 1953 did not alter the essential character of communism in the Soviet Union. Destabilized by the far-reaching reforms initiated by Mikhail Gorbachev in the 1980s, the Soviet system disintegrated in 1991.

Rwanda: Mamdamis Argument and Suggestion for Reform :: essays research papers

â€Å"Hegel once said that how humans are distinguished from animals is the fact that they are willing to give life for a reason higher than life. He should have added that humans, unlike animals, are also willing to take life for a reason they consider higher than life† (Mamdani, 2001, 196). Why was America under terrorist attack on 9/11? Why was Hitler obeyed? Why did hundreds of thousands of ordinary Hutu kill hundreds of thousands of ordinary Tutsi in an attempted genocide that lasted 100 days? To answer these questions it is important to distinguish between who are the subordinate and superordinate groups involved. In order for an oppressed group to have complete political freedom, the oppressor must be exterminated. Mamdami attempts to explain why the genocide of 1994 occurred by comparing people who identified as either Hutu or Tutsi and how historical, geographical, and political components made these identities. A colonial term for genocide is â€Å"ethnic cleansing†, making the world new again so change can occur (Mamdani 12). HISTORY: To understand the Rwandan genocide, it is crucial to look at the historical events that lead up to 1994. The Hutu and Twa were the original inhabitants till the 1300’s when Tutsis’ migrated into Rwanda. By the 1600’s the king of Rwanda was Tutsi. In 1916, Belgian forces occupied Rwanda and Tutsi kings become indirect rulers. By 1957, Hutus’ develop political parties and in 1959 the Hutu’s force the Tutsi king and thousands of other Tutsis out of the country. A Hutu president comes to power in 1962 and in 1963, about 20,000 Tutsis are killed. Tutsi forces invade Rwanda from Uganda in 1990. Hutu Rwandan president attempts a peace treaty signing monitored by the UN in 1993 to share the power. In 1994 the Hutu president is killed by an unknown group and the genocide begins against the Tutsi lasting 100 days. Eight-hundred thousand Tutsis are murdered. (BBC.com) Of course, this is only a brief historical breakdown written from a eurocentric standpoint, but it does help explain the political identities of the opposing groups within Rwanda. The main motivators that drove Hutu groups to kill their Tutsi neighbors were, a.) The Hutu who killed were entitled to that Tutsi person’s property and material goods.

Virginia Woolf as Feminist and a Psychoanalyst Essay -- Biography Biog

Virginia Woolf as Feminist and a Psychoanalyst When first introduced to the feminist and psychoanalytical approaches to literary criticism, it seems obvious that the two methods are opposed to each other; at the very least, one method -the psychoanalytic - would appear antagonistic to feminism. After all, there is much in Freud's earlier theories that a feminist would find appalling. It also seems to be a conflict that the feminists are winning: as feminist criticism gains in popularity, the psychoanalytic approach has apparently fallen into disfavour within the academic community. However, Freud's theories and psychological models continue to survive, and evolve, to the point where even certain feminists - namely the French - have employed aspects of Freud's theories to further their own studies. Critics such as Leclerc and Duras employ Freud's concept of the Oedipal Complex in their search for l'Ã ©criture feminine - a style of uniquely-feminine writing found in the pre-Oedipal stage that exists before the tyrannical foot of the father (the patriarchy) stamps it out. This is Psychoanalytic Theory and Feminism working together, to gain new insights into literature, old and new. Take, for instance, the works of Virginia Woolf: both the psychoanalyst and the feminist can find much of interest within her short stories and novels. Woolf is an important figure for feminists: not only was she one of the first female writers to gain the recognition she deserved during her own lifetime, but certain of her works, such as The Angel in the House and A Room of One's Own, were important and ground-breaking achievements in the female literary field. Feminist critics would approach Woolf's stories and essays by ... ...eminist, or a marxist, or even a deconstructionalist, even if but for a moment, by using multiple methods of literary analysis, a deeper and more fulfilling understanding of the text can be achieved. Works Consulted Blain, Virginia. "Narrative Voice and the Female Perspective in Virginia Woolf's Early Novels." Virginia Woolf: New Critical Essays. Ed. Patricia Clements and Isobel Grundy. London: Vision, 1983. 115-36. Fisher, Jane Elizabeth. "The Seduction of the Father: Virginia Woolf and Leslie Stephen." Women's Studies 18 (1990): 31-48. Hill, Katherine C. "Virginia Woolf and Leslie Stephen: History and Literary Revolution." PMLA 96.3 (1981) 351-62. Lee, Hermione. Virginia Woolf. London: Vintage, 1997. Squier, Susan M. Women Writers and the City: Essays in Feminist Literary Criticism. Ed. Susan M. Squier. Knoxville: U of Tennessee P, 1984. 114--33. Virginia Woolf as Feminist and a Psychoanalyst Essay -- Biography Biog Virginia Woolf as Feminist and a Psychoanalyst When first introduced to the feminist and psychoanalytical approaches to literary criticism, it seems obvious that the two methods are opposed to each other; at the very least, one method -the psychoanalytic - would appear antagonistic to feminism. After all, there is much in Freud's earlier theories that a feminist would find appalling. It also seems to be a conflict that the feminists are winning: as feminist criticism gains in popularity, the psychoanalytic approach has apparently fallen into disfavour within the academic community. However, Freud's theories and psychological models continue to survive, and evolve, to the point where even certain feminists - namely the French - have employed aspects of Freud's theories to further their own studies. Critics such as Leclerc and Duras employ Freud's concept of the Oedipal Complex in their search for l'Ã ©criture feminine - a style of uniquely-feminine writing found in the pre-Oedipal stage that exists before the tyrannical foot of the father (the patriarchy) stamps it out. This is Psychoanalytic Theory and Feminism working together, to gain new insights into literature, old and new. Take, for instance, the works of Virginia Woolf: both the psychoanalyst and the feminist can find much of interest within her short stories and novels. Woolf is an important figure for feminists: not only was she one of the first female writers to gain the recognition she deserved during her own lifetime, but certain of her works, such as The Angel in the House and A Room of One's Own, were important and ground-breaking achievements in the female literary field. Feminist critics would approach Woolf's stories and essays by ... ...eminist, or a marxist, or even a deconstructionalist, even if but for a moment, by using multiple methods of literary analysis, a deeper and more fulfilling understanding of the text can be achieved. Works Consulted Blain, Virginia. "Narrative Voice and the Female Perspective in Virginia Woolf's Early Novels." Virginia Woolf: New Critical Essays. Ed. Patricia Clements and Isobel Grundy. London: Vision, 1983. 115-36. Fisher, Jane Elizabeth. "The Seduction of the Father: Virginia Woolf and Leslie Stephen." Women's Studies 18 (1990): 31-48. Hill, Katherine C. "Virginia Woolf and Leslie Stephen: History and Literary Revolution." PMLA 96.3 (1981) 351-62. Lee, Hermione. Virginia Woolf. London: Vintage, 1997. Squier, Susan M. Women Writers and the City: Essays in Feminist Literary Criticism. Ed. Susan M. Squier. Knoxville: U of Tennessee P, 1984. 114--33.

A Learning Experience

Each individual in the general society has their own respective life course and experiences based upon the decisions they choose whenever faced a certain circumstance or an encounter with another human person. Each person react differently on these experiences as part of the individuality complex of the human nature.However, similar on all occasion, each individual can learn an important lesson from each of these encounter or circumstance which is essential to their personal development. If a person is willing enough and is open towards the nature of the experience, he or she can effective be enlighten from the moral significance of the event. Thus, through the actual experience of each person that he or she learns to develop and improve into a better human person.On regards to this aspect, the author of this paper has also experience a certain circumstance from where he learned a valuable lesson that he still holds until the present. From this experience, the author of this paper ha s seen the value of time on which it only gives a single opportunity for an individual to succeed in a scenario for a moment.As the proverbs of wise always say, time is precious with worth as of gold. In the fiber of time, every second counts continuously passing by then never coming back thus, it is important to give importance for each moment of it. Given this in an actual circumstance made the author of this paper realize the important value of each moment thus, learning never to waste another second of it.During the period of youth of subject of this experience, he was used to moments of having second opportunity wherein if one chance is wasted then another is given.This is a certain privilege that the author of this paper has always enjoyed through all of his experiences particularly in his educational institution. Teachers and educational facilitators have always given this boy a privilege (or a handicap) due to various personal reasons such as family background, excellent man ipulation through words, social influence and others.It is as if the fate of opportunity landed upon the hands of this boy enabling him to manipulate time and chances for his own personal success. However, this has taught him a negative lesson on which he become used to this privilege. Indeed, the errors of his ways has struck back unexpectedly leading to a disastrous ending.A critical examination important for his overall educational performance has come and as always, this boy never paid much attention to it regardless of the time constraint it has for the preparation period. He regarded this task at its specific period to be insignificant because of his expectation for special exemption.However, beyond his knowledge, the administrator for the examination came from another institution on which he has not control over thus, negating his privileges. He was forced to have the tasks at its given period with any preparation at all.This disastrous encounter has reflected its influence u pon the result affecting the course of his educational potential forcing him to step a level down. From this encounter he has learned that time indeed does not honor special privileges, social influence and others. It views the public as equal under its power and control giving each individual a specific opportunity for each moment.However, the wheel of time has given the boy another opportunity in the form of a lesson, which was deeply engraved in his mind. From that moment, he has realized his mistake and give time the value it deserve through never wasting another moment of it.He focused his interest to what it important particularly his education and was able to succeed in his own course of life. From his experience, he has learned a valuable lesson, which he strongly holds in his track towards the future. Because of this change, he was able to succeed and share this lesson through the narration of this story to move others to give value to their own time and opportunity.