Travel as Part of Education Essay Example for Free

Travel as Part of Education EssayTravel in the young is g pop of education, in the elder a part of commence. Life is real, life is practical, but much of what a man learns from books is theoretical. Therefore, he is required to have practical friendship of men and things in order to equip himself for the struggle of life. This practical knowledge is gathered from the first hand knowledge of the outside world. We learn by pergonal thoughtfulness much more(prenominal) than what we learn from books. Real life does not always move according to the literary canons of the novelists and dramatists. Man is not a machine, restricted to a prescribed or umform action.Therefore, in order to study man and his concerns, with real men and women The more a ms travels, the more he tees of the world and studies it better, the more experienced he change states. change of location exercises a broadening influence upon human intelligence. Man is the creation of his environments. A narrow and monotonous surrounding has always a cramping effect on his mind. A young man who has never set foot out of his home grows narrow in outlook, involved in his thoughts and his psychological stature is dwarfed. We on the other hand gain valu fit experience by coming in contact with persons of diverse shades of opinion.We visit different countries and have the opportunity of observing their customs and manners, thus we learn to respect the merits of others and our prejudices against them disappear. A kind of mutual goodwul is created and great selfconfidence is built up among the young. Trevelling does not except give us a better understanding of other people but at the same time enables us to have an impartial and unaffectionate view of our own accomplishments. We are able to see our own self as others see us. In this way we arc able to form a just opinion of ourselves, Moveover, the advancement and progress made by others encourage and Inspire us.Those who only stay at home are no t able to keep themselves abreast with the movements of world thoughts,. Travelling encourages sense of enterprise, action ,and adventure ture. The people who never stir lout remain isolated, ignorant and lag layabout others in the march of civilization, History is full of such instances where ignorant and timid people have been subjected to domination by the enterprising and daring nations. It is true shut in of India that our slavery is largely due to our timidity, isolation and superstitions. Travelling is a source of joy and pleasure.Today science has made travelling so easy, swift and so comfortable. If variety is the spice of life, travelling gives us that variety. We see different scenes of reputation, various countries, varied types of men and women and social and political institutions. The grandeur and varied beauty of nature has an ennobling influence upon us. The snow-covered mountains, dancing streams of water, vast expanse of green wood , the sweet melody of birds transport us with wonder, delight and admiration. They make us forget our pettiness and uplift and purify our minds and spirits.The beauties of nature have the power to touch man deeply and make him feel the wonders of the vast universe, pit Travelling has great educational value for the youth It has great disciplining influence upon him. It teaches the lessons of cheerfulness, patience and courage in facing the discomforts and inconveniences of life. The lesson of self-help and self-reliance is also imparted. Travelling teaches the value of sociability and good humor. We grow tolerant, modest and self-assertive. The freer intercourse with other people tends to make us broadminded, accommodating and truly intelligent.Our minds ripen and become sobered through experience. Thus we become sober reformers. Our travelling in this way benefits not only us but the country we live in. It is for all these reasons that travelling has been spoken of as a part of education. It has fascinated pe ople from early times. They, pave defied the hazards to amuse themselves. However, in order that we may profit by travel, we must travel with easy eyes, open mind and a sympathetic heart. It is essential that we must possess charity and courtesy. We must not only travel for the sake of pleasure but with a desire to see, learn and understand.Then alonef travelling will impart more impressive lessons than books. It is true That no education is complete without travelling and no great and g more varied joy can be had form any other source. . We on the other hand gain valuable experience by coming in contact with persons of different shades of opinion. We visit different countries and have the opportunity of observing their customs and manners, thus we learn to appreciate the merits of others and our prejudices against them disappear. A kind of mutual goodwill is created and great self-confidence is built up among the young.

Women’s Rights in Saudi Arabia Essay Example for Free

Womens Rights in Saudi Arabia EssayWhile researching reading about womens rights in Saudi Arabia, I found a few articles that confirm that the Saudi guardianship system continues to treat women as minors. These articles occupy valuable information about the requirements for women in the conservative Kingdom. Under these requirements, girls and women are forbidden from studying, elaborate, or even traveling without the permission from their antheral guardian. While more women are fighting for their rights, there is evidence that some women in Saudi Arabia do non want change because of the fear. My goal is to make a unfit impact in the world, in order to help these women, who deserve to be treated as human beings. In Saudi culture, the sharia is interpreted fit in to a inexorable Sunni form known as the way of the Salaf.The law is unwritten, leaving judges with signifi dismisst discretionary power, which they usually exercise in favour of tribal customs. Its the culture, not the religion, is a Saudi saying. many another(prenominal) Saudis do not see Islam as the main impediment to womens rights. Said integrity fe priapic journalist, If the Quran does not ad queue up the subject, then the clerics will err on the side of caution and make it haram. The driving outlaw for women is the best example. Women in many a(prenominal) other Islamic nations, contrive more political power than Saudi women. The 2009 Global Gender Gap Report that, Kyrgyzstan, Gambia, and Indonesia significantly higher than Saudi Arabia for womens equality. In 2006, a g everyplacenment poll found that over 80 percent of Saudi women do not think women should drive or work with men and hold political office. I think this is due to the custom and the fear feel by these women. They dont know what they are miss , for that reason I think they get hold of a change in their life because women are not animals, we live now in the 21st and they cant still live I the past.MALE GUARDIANAl l females must have a male guardian, typically a father or husband. The guardian has rights over the woman in many human faces of civic life. Depending on the guardian, women may inquire their guardians permission for marriage and divorce travel, if under 45 grooming employment opening a bank account elective surgery, especially when sexual in nature. Guardianship requirements are not written law. They are utilise according to the customs and understanding of particular officials and institutions as hospitals, police stations, banks, etc. In a 2010 interview with the New York Times, Noura Abdulrahman, a female employee of the Saudi Ministry of Education, defended male guardianship as providing protection and love. In Saudi culture, women have their integrity and a special life that is separate from men.As a Saudi woman, I demand to have a guardian. My work requires me to go to different regions of Saudi Arabia, and during my business trips I always bring my husband or my brother . They ask cypher in returnthey only want to be with me. The image in the West is that we are dominated by men, but they always forget the aspect of love. People who arent familiar with Shariah often have the wrong idea. If you want stability and safety in your life, if you want a husband who takes criminal maintenance of you, you wont find it except in Islam. In 2008, Rowdha Yousef and other Saudi women launched a petition My Guardian Knows Whats Best for Me, which gathered over 5,000 signatures. The petition defended the status quo and requested punishment for activists demanding equality between men and women, mingling between men and women in mixed environmentsDRESS CODEI think it is too much that these women had a dress code. wherefore they cant use normal cloths? For me its all about to take control of the women. Traditionally, womens array must not reveal anything about her body. It is supposed to be thick, opaque, and loose. It is also required to be a dull color, unador ned, and generally not of interest to the male. It should not resemble the clothing of men. Although the dress code is often regarded in the West as a highly visible symbol of oppression, Saudi women place the dress code low on the list of priorities for reform or leave it off entirely.46 Journalist Sabria Jawhar complains that Western readers of her Huffington Post blog are obsessed with her veil. She calls the niqab nugatory (People) lose sight of the bigger issues like jobs and education.Thats the issue of womens rights, not the meaningless things like passing legislation in France or Quebec to ban the burqa Non-Saudis presume to know whats best for Saudis, like Saudis should modernize and join the 21st century or that Saudi women need to be empty of the veil and abaya And by freeing Saudi women, the West really means they want us to be just like them, running around in short skirts, nightclubbing and abandoning our religion and culture. A majority of women say they want to w ear the veil. They cite Islamic piety, pride in family traditions, and less sexual harassment from male colleagues. For many women, the dress code is a part of the right to modesty that Islam guarantees women. Some also perceive attempts at reform as anti-Islamic intrusion by Westerners They fear Islam, and we are the worlds foremost Islamic nation.SEX SEGREGATIONWomen and men must minimize social interaction. Most offices, banks, and universities have separate entrances for men and women. match to law, there should be physically and visually separate sections for the sexes at all meetings including weddings and funerals. Many Saudi homes have one entrance for men and another for women. unavowed space is associated with women while the public space, such as the living room, is reserved for men. Traditional house designs use high walls, compartmentalized inner rooms, and curtains to protect the family and particularly women from the public. As a practical matter, gender mixing is f airly common in parts of daily life. Women customarily take taxis driven by men. Many households have maids, who mix with the non-mahram men of the households. Maids, taxi drivers, and waiters tend to be foreigners, which are sometimes used as a reason to be less strict about segregation.EMPLOYMENTGirls are taught that their primary role is to raise children and take care of the household. According to Saudi culture, a womans place is at home and a mans place is at the workplace. Saudi sharia allows women to work, provided it does not lead to her neglecting her essential duties of homemaking. Women may also work if it is necessary for their support, such as a leave with children. Women are allowed to work as long as their husbands or their male guardians approve of the work. Her work must also be deemed suitable for the female var. and mentality. It is forbidden for women to be appointed as judges, and positions of high public office are also reserved for men. Teaching and nursing are common professions for women. knowledgeApproximately 71% to 78% of females are literate, in comparison to 85% literacy rates in males. More women receive secondary- and tertiary-education than men. Fifty percent of working women have a college education, compared to 16 percent of working men. In contrast, in 1970, only 2% of women were literate. Now Saudi Arabia is planning to build a new urban center exclusively for women as it bids to combine strict Sharia law and career minded females, pursuing work. The plan coincides with the governments ambitions to get women to play a more vigorous part in the development of the country. Among the stated objectives are to create jobs, particularly for younger women. Im sure that women can demonstrate their efficiency in many aspects and explain the industries that best suits their interests, their nature and their ability, Modons deputy director-general, Saleh Al-Rasheed, told Saudi daily newspaper al-Eqtisadiah.CONCLUSIONAfter resear ching all this information, I conclude that women in Saudi Arabia need to have right and be treat as equal as a men. This is going to make a big impact into their life because they need chance to express themselves, freedom of speech, and at the same time, they need to express their opinions without an appropriate manner. Remember, women are human and they had feelings, they are not an animal.Works CitedEd Husain. Why Womens Rights in Saudi Arabia Are Still So Bad. The atlantic.Web.28Sep.2011. Human Rights Watch http//www.hrw.org/world-report-2012/world-report-2012-saudi-arabia

Conflicts with White Settlers Essay Example for Free

Conflicts with White Settlers EssayThere were many takes of the conflicts that occurred between white settlers and indwelling Americans. The Europeans who came to the New World in the early years of their exploration found native people who had a complex civilization with a very different culture than the Europeans did. With the clash of these two cultures, conflict was inevitable. Each culture fought to keep theirs alive and dominant. One major cause of conflict was broken treaties and promises with the settlers. This caused a plug of anger on each side. Along with broken treaties, constant invasion on one anothers land was another major cause of the conflicts.Lastly, unfair treatment and trade negotiations were also helping the fights continue. In conclusion, the conflict between Colonists and Indians was due to the Colonists huge greed for power and land. Major Conflicts There were a few major conflicts with Indians that have held a big part in the history of the United S tates. The French and Indian War was among one of the first nigh important conflicts with the indwelling Americans in the history of America. The French and British were split over what land was whose, and the Indians were split. Another war involving Native Americans was Pontiacs War.With the French eliminated, Native Americans were left alone in their fight against British colonial aggression. The Indians attacked, and fearing more tension between Native Americans and settlers, Englands King George III issued the Proclamation of 1763. This was prohibiting settlement watt of the Allegheny Mountains. A few more were the Battle of Point Pleasant and the Revolutionary War even involved Native Americans. As one can see, a big part of the history of the United States of America involves the people who first called it home, Native Americans.

Technologies to Analyze Big Data

Technologies to Analyze Big DataHassan, Ruman UlCurrently, most of the companies like Facebook, Google, and Amazon are generating an extensive data and this data is termed as loose data. In addition to the above mentioned sources, there are near other sources like banking, airlines, stock market, and digital media that generates big data. Nandimath, Patil, Banerjee, Kakade, and Vaidya (2013) state that the volume of data being generated free-and-easy is increasing rapidly and the size of this data is nearer to zeta bytes (p. 700). This means the size of the data is increasing quickly. This data holds a value that can services business organizations to rectify their business stability and to increase their profit. However, this big data creates the problem of storage and exerciseing. Prior to ten years ago, the data was stored and processed in a handed-down database management system. This system is called as Relational Database Management System (RDBMS). After the rise of b ig data, it is really difficult for the RDBMS to process this large data. Thus, many researchers focuse their charter in developing a technology that can effectively analyze the big data.After extensive research, Google has proposed a google file system for storing the big data and a map reduce algorithm for processing this data. Moreover, Nandimath et al. (2013) assert that Apache hadoop is used for distributed processing of big data (p. 700). This framework suspensors many organizations in efficiently analyzing their big data. Beside Hadoop, the other technologies that help in analyzing the big data are Pig, Hive, Hbase, Zoo Keeper, and Sqoop. Each tool has their own requirements, so the usage of these tools depends on the criticality of the data and the requirement of the organization or business. However, the trine major technologies to analyze big data are hadoop, lay in, and blabber.Hadoop is one the major technologies to analyze the big data. It is the framework certai n by Apache for processing extensive data sets. This framework helps business firms to effectively process their unstructured data like video, audio and image. In addition, this framework benefits many business organizations to improve their financial stability by effectively analyzing their data. Further more than, the hadoop framework consists of two main components, hadoop distributed file system (HDFS) and map reduce programming paradigm. The work of HDFS is to store the comprehensive datasets in distributed environment. Distributed environment allows the developer to store the large data sets on multiple machines. Thus, it helps in improving the retrieval process of immense data. In addition, Nandimath et al. (2013) state that Hadoop uses its own file system HDFS which facilitates fast transfer of data which can sustain node failure a whole (p. 700). It also helps developer to scourge the storage problem. For example, if immense data is stored on a single machine hence it cr eates a problem of processing and retrieving because of its size. Thus, if that data is distributed on multiple machines and then it provide an ease for the developer for processing and retrieving. Beside fast processing and retrieving, reliability is also a benefit of HDFS. HDFS achieve high reliability by replicating the data on different machines. Therefore, if any machine fails in distributed environment, then the data of that particular machine will be easily recovered through backups.According to Dittrich and Ruiz (2012), the benefit of map reduce is that developers need to define only single functions for map and reduce labor (p. 2014). This map reduce paradigm helps developers to overcome the problem of efficiently processing the data. Moreover, Nandimath et al. (2013) believe that the purpose of map is to divide the job into smaller parts and distribute it to different nodes, while the purpose of reduce is to generate the in demand(p) result (p. 701). For instance, if Fa cebook wants to analyze the drug user interest then the Facebook will first deploy the generated data on HDFS and performs the map task to divide the zeta byte of data and then perform the reduce task to depress the desired result. Thus, it shows that hadoop helps organizations for efficiently analyzing their extensive datasets.Another technology to analyze big data is hive. It is a data storage warehouse framework build upon hadoop. It provides an ability for the developer to structure and analyze the data. In hadoop, the data processing task is performed exploitation Java programming manner of speaking where as in hive, processing a task is performed using structured interrogative sentence language (SQL). In addition. Borkar, Carey, and Liu (2012) assert that Hive is SQL-inspired and reported to be used for over 90% of the Facebook map reduce use cases (p. 2). Thus, the main goal of hive is to process the data through SQL like interface. Moreover, the traditional SQL standar ds were restricting the hive from performing some intensive operations like extracting, transforming and loading the big data. As a result, hive developed their own query language called hive query language (HQL).Besides traditional SQL standards, HQL includes some specific hive extensions that provide an ease for the developer to effectively analyze the big data. Furthermore, hive helps developer to overcome the scalability issue by using distributed file system mechanism. It also helps them to achieve the fast response time through HQL. For example, general SQL statements like SELECT and INSERT will consume more time on traditional database management system for big data where as in hive the same operations can be performed efficiently. Moreover, Liu, Liu, Liu, and Li (2013) conclude that with precise system parameter tuning in hive, an acceptable exertion can be achieved (p. 45). This means if the developer precisely changes the system parameters for analyzing the data, then per formance efficiency can be improved for that task.Besides hadoop and hive, pig is also a major technology to analyze the big data. Pig allows the developer to analyze and process the enormous datasets quickly and easily through transformation. It is also called dataflow language. The pig framework is used along with HDFS and map reduce paradigm. The working of pig is similar to that of hive except the query language. In pig a task is performed using pig Latin whereas in hive, the task is performed using HQL. The main benefit of pig is that pig latin queries can be integrated with other languages like Java, Jruby, and Python and it also allow users to define their own functions to perform the task as per their needs. Moreover, as pig is a dataflow language it helps developer to illustrate the data transformation process. For example, in pig it is easy to perform the data transformation operations like Split, Stream, and separate compare to SQL. In addition, the pig framework is divi ded into two parts pig latin language and pig interpreter. The pig latin is a query language to process big data. In addition, Lee, Lee, Choi, Chung, and Moon (2011) assert that in pig framework a task is processed using pig latin language (p. 14). The pig latin queries help developer to process the data efficiently and quickly. Another component of pig framework is pig interpreter. The work of interpreter is to transpose the pig latin queries into map reduce jobs and also to evaluate the bugs in pig latin queries. For example, if Facebook developer writes the pig latin query to find the people in India that like rock music, then this query is first interpreted by pig interpreter to identify bugs and then it is converted to map reduce jobs. Thus, with the help of pig latin queries, developers can avoid the stress of writing a tedious code in java to perform the same action.In conclusion, the three technologies to process the big data are hadoop, hive, and pig. These frameworks help business organizations to find the value from their data. In addition, each technology is useful for performing a task differently. For instance, Apache Hadoop is useful for analyzing the offline data and it cannot process the real time data like banking data. Moreover, hive provides a SQL like interface that makes the processing a lot easier because the user does not have to write the lengthy tedious code. Hive is good for those user who are not good at programming and best in SQL. Similarly, pig also makes the processing task much easier forusers. All the map reduce jobs can be written in pig latin queries to get desired results. Therefore, organizations should select the technology based on their data formats and requirements. However, all these technologies help organizations to process and store their data efficiently.

Power Blackout Preventing By Power Swing Detection

magnate memory loss Pr even upting By Power overleap DetectionPower Blackout Preventing By Power Swing Detectionand Out-Of-Step fortressPower agreement interruption, such as teddy occurrence, automatic reclosing, and large loads disconnection. These builds pluck the generating units to adapt with the immature load source but the authors banking company do this instantaneous due to the inertia. This cause a index finger go around over. It may be inactive business office fell or un motionless office staff overleap. In the st competent spot get about the generator squeeze out return to the new equilibrium state. On the separate hand, in the un stable function swing the generator cant reach to the steady state operation and run out of step and may lead to the amnesia. in the case of might swing the load resistance may image into the operation device characteristic of the distance electrical relay and case friendless tripping for the transmission busine sss. So, the distance relay isnt supposed to tripe low the part swing if stable or wobbly to give the frame the accessibility to return to its steady state. A power swing block PSB its a function inside the modern distance relays that retain unwanted tripping by block the tripping signal in case of stable or unstable power swing. However, when the fault happens due to a Power swing it moldiness be cleared very rapidly with high level of numberability and selectivity. Out-of-step trip (OST) in is a function that included in the modern relays to bring home the bacon the separation of the power system under the unstable power swing. The major aim of this function to differentiate amidst the stable and unstable power swing and separate the power system into predetermined zones to achieve the stability and continuity of the service.Key wordsPower Swing Detection Out of Step Protection Distance Protection.USAUnited states of AmericaNERCNorth American Electric Reliability Corporat ionN-1criterionMost security rules therefore call for the system to be able to withstand the loss of any single componentUCTEUnion for the Coordination of the Transmission of ElectricityPSBPower Swing BlockOOSOut-of- StepOSTOut-of-Step TripTOSB ambit Time of out-of-step BlockingTOSTSetting Time of out-of-step Tripping icon 1Causes due to different disturbances approach pattern 2Two-Machine System model purpose 3The Power Angle CurveFigure 4The Equal-Area Criterion (Figure shows a fast fault clearance and a stable swing)Figure 5 hazardous System due to Slow Clearing TimeFigure 6Wrong operation of distance relay due to Power SwingFigure 7Two-Blinder Power Swing Detection SchemeFigure 8Automatically sized power swing area.Figure 9Mo nonony criterion.Figure 10Continuity criterionFigure 11Smoothness criterion.Figure 12Logic for power swing determineionFigure 13electrical resistance trajectory for 3-machine power swingFigure 14Impedance trajectory during stable power swing.Figure 15Inte rnal fault B-G during a power swing.Figure 16Internal fault B-G with single pole trip during a power swing.Figure 17External fault in BC-G during a power swing.Figure 18Example of a reverse busbar fault during power swing.Figure 19Rotor angle and impedance trajectories for stable power swing.Figure 20Rotor angle and impedance trajectories for unstable power swing.Figure 21Basic signals for out of step detection.Figure 22Logic for special out of step tripping.In the previous few years we have suffered from big disturbances in the power system which caused complete brownout and millions of users including the industry have suffered from big economical losses. These disturbances cause big fluctuations in active and reactive power, low electromotive force, voltage instability and angular instability between the generated power and consumed power which results in loss of generation and load which effected on both sides the power generation and the end customers.During the steady state in operation(p) form, the power systems enmeshs on the nominal frequency (50Hz or 60Hz) +/- 0.02 Hz and Voltage=Nominal voltage +/- 5% 1. The complete synchronism of nominal frequency and voltage at the sending and receiving ends make complete balance of active and reactive power between generated and consumed active and reactive powers.Power system faults, line geological fault, generator disconnection, and the loss of large blocks of load result in sudden changes to electrical power, which is due to the causes shown in Fig 1.DisturbancesLine Switching generator DisconnectingParalleling other GeneratorAddition of loadLoss of loadCausesLoss of Synchronism surrounded by VoltagesLoss of Synchronism Between arrange sequenceLoss of Synchronism Between phase anglesLoss of Synchronism Between frequencies1.1. Blackout History1.1.1 Some blackouts became in 2003 (during six weeks).in the northeastern USA and central Canada and in Europe, which alter more than than 100 million people.O n 14 August the northeastern USA and central Canada 62 GW power outage, stirred 50 million people. power supply restoring took just about(prenominal) days.On 14 August London 724 MW power outage, affected 410 thousand people. power supply restoring took 40 minutes.On 2 family the southern Malaysia affected 5 states (out of 13) in Malaysia, including the capital Kuala Lumpur. power supply restoring took 5 hours.On 5 September Birmingham 250 MW power outage, affected 220 thousand people. power supply restoring took 11 minutes.On 19 September nine US states and parts of Ontario, Canada affected 4.3 million people. cause hurricane Isabel.On 23 September Denmark and Sweden affected 5 million people. power supply restoring took 4 hours.On 28 September Italy affected 57 million people. power supply restoring took 4 hours. 1, 2, 3Blackout in the Northeastern USA and Central Canada 14 August 2003Initially the event was the tripping of the power line that caused by the short circ uit to establish due to tree contacts.Blackout in the northeastern USA and central Canada was studied by The North American Electric Reliability Corporation (NERC) and some contravention of caoutchouc and reliability standards was place following the outage of the first 345-kV line, dispatcher of the power system did non make the necessary actions to return the system to a safe operating state within 30 minutes to fulfillment of N-1criterion which mean Most security rules therefore call for the system to be able to withstand the loss of any single component. When a power system satisfies this criterion, it is said to be N-1 secure dispatchers of neighboring transmission system were not certain about this situation. insufficient training of dispatchers. functionless monitor system in part of the power system.Reliable and safety operation of the power systemThe North American Electric Reliability Council (NERC) have developed the operating of the system and planning standards to confirm the reliability and the stability of a transmission ne twork that are depend on seven light upon conceptsBalance power generation and demand continuously.Balance the reactive power supply and the demand to keep scheduled voltages. monitor lizard the power flow over the transmission lines and other facilities to ensure that thermal (heating) limits are not exceeded.Keep the system in a stable condition. lock in the system so that it remains in a reliable condition even if a contingency occurs, such as the loss of a key generator or transmission facility (the N-1criterion).Plan, design, and maintain the system to operate reliably.Prepare for emergenciesBlackout in Italy on September 28, 2003The situation in the Italian power system before blackout wasnt exception. total load of Italy was 27 444 MW. 3 487 MW pump load. 6 951 MW physical import to the Italian power system. some transmission lines in neighboring power systems were out of service by reason of scheduled mainten ance. the Italian power system was connected to neighboring power systems via 15 transmission lines.Sequence of events of the blackout in ItalyThe initial event was the 380 kV line tripping in Switzerland. Fewer than 25 minutes after this event the Italian power system ceased to operate synchronized to the UCTE system. Union for the Coordination of the Transmission of Electricity030142 the 380-kV line tripping in Switzerland (Lavorno Metlen) line was difficult loaded at 86%. The cause of tripping a wire contacted to a tree. The attempts of single-phase auto-reclosing and also the attempt of the operators to put this line back into operation were not successful and the line was disconnected by its security device, due to high phase angle (42). After the Lavorno Metlen line tripping, the other 380 kV line in Switzerland (Sils Soaza) became overloaded.0311 the Swiss dispatch asked the Italian dispatch to reduce the import of Italy by 300 MW (on scheduled value).032521 the sec ond overloaded 380 kV line tripping in Switzerland (Sils Soaza).032525 the third overloaded 380 kV line tripping in Switzerland.032526 the interconnection line Austria Italy (Lienz Soverenze) tripping.032533 the Italian power system started to disconnect from the UCTE system After disconnection Italy from the UCTE system the frequency in the Italian power system dropped suddenly, caused by the negative imbalance between power injection to the system and system load. The blackout in the Italian power system became within less than 3 minutes.2140 official announcement about emergency cancellation in whole power system of Italy.Main causes of the blackout in ItalyThe initial event was the 380-kV line tripping in Switzerland in consequence of the wire the tree contact. The attempts of single-phase auto-reclosing and also attempt of the operators to put this line back into operation were not successful and the line was disconnected by its protection device, because phase angle w as too high. We can see two causes insufficient protective zone under the transmission lines. overloaded lines.After the first 380 kV line tripping in the Swiss power system other power lines became overloaded. That means that the safety N-1criterion was non fulfillment in the Swiss power system.We can see other causes Violation of basic safety N-1criterion. high import to Italy. incomplete information about neighboring power system. pump load was stopped too late, by automatics.1.1.2. System disturbance in the UCTE system on 4 November , 2006The system disturbance in the UCTE system on 4 November, 2006 was the most serious incident in the UCTE system within an interconnected Europe history.The system disturbance started in the German transmission system on 4 November 2006, roughly 10 p.m. This disturbance split the UCTE system into three separate parts (West, North-East and South-East). more than 15 million households were affected by an interruption of the electricity. The UCTE system resynchronization was completed 38 minutes after the splitting. 4What happened?On 18 Sept. 2006, the shipyard (Meyerwerft) sent a entreat to E.ON Netz to disconnect two 380 kV line Conneforde-Diele for the transport of the ship through the Ems River to the North Sea on 5 November at 0100. As a switching in the dying several times. The E.ON Netz operator did a power flow calculation and affirm fulfillment of safety N-1criterion using numerical computation. Analysis did not show any problem and so the operator provisionally approved the collect of the shipyard and informed neighbouring transmission system operators (RWE Germany and TenneT Niederland). On 3 November (around 12.00) came a new request to E.ON Netz for a time change of two power lines Conneforde- Diele switching on 4 November at 2200. A provisional agreement was minded(p) by E.ON Netz after a new analysis. But RWE and TenneT operators were not informed about this change at the same time. Only at 1900 on 4 November E.ON Netz informed TenneT and RWE TSO about the new time for switching off the Diele-Coneforde line.At 2129 according to the load flow calculation make by E.ON Netz did not indicate any violation of limit values. But N-1criterion was checked without numerical computation, was checked based on an empirical evaluation of the gridiron situation only.Sequence of events At 2138 a 2139. power lines Conneforde-Diele were disconnected. At 2139. after the switching operation, two 380 kV lines was overloaded. At 2141. RWE dispatcher informed E.ON Netz about the safety limit value on the line Landesbergen-Wehrendorf (an interconnection line between E.ON Netz and RWE TSO). Later investigation open different protections setting on this line. Between 2205 and 2207, the load on the 380 kV line Landesbergen-Wehrendorf join ond and the RWE operator called E.ON Netz at 2208 with the request for urgent intervention due to return to the stable grid condition. E.ON Netz made an empirical ass essment of corrective switching measures without making load flow love for checking the N-1criterion. E.ON Netz expected that coupling of the bus-bars in the substation of Landesbergen would reduce of load on the 380 kV line Landesbergen- Wehrendorf. But this line was overload more than 100% and so was tripped and the other lines became overloaded. At 221028 the UCTE system splitted to three areas after the power lines switching in E.ON Netz, RWE, the Austrian power system and after disconnection of interconnection lines Croatia Hungary and Marocco -Spain. The initial event of the system disturbance in the UCTE system was scheduled switching off two power lines.Main causesThe investigation identified two main causes of the disturbance as well as some critical factors which had significant influence on its course non fulfillment of the N-1criterion or verified its fulfillment without numerical computation. insufficient co-ordination between the transmission system operators. dissa tisfied power plant operation in emergency tripping of generation units (particularly roll out power plants) during disturbance and uncontrolled reconnection of generation units. limited range of action available to dispatchers. insufficient training of dispatchers.1.2. Blackout Causes and RisksA blackout is a power outage. This state means the loss of the electricity supply for a part of the power system or the whole power system.A. Blackout CausesNatural causesLightening.Rain.Snow. breaking wind storm.Technical FailuresTransformer faults.Short circuits.Human errorError of judgment.Insufficient co-ordination between the transmission system operators.Insufficient training of dispatchers.TerrorismBombing.cyber-attacks.B. Blackout Riskspower system equipment damage.heavy economical losses.jeopardy of economy functioning.life paralysis in stricken parts of country.Several blackouts cases became in the world of last years. Causes of these disturbances were various technical, ruffianl y weather conditions, human failing.C. Some impacts of Northeastern BlackoutFord Motor CompanyThe stoppage of factorys furnace cause to convert the molten metal to solid metal. The partnership reported that it need a week to clean the furnace.Marathon Oil CorporationsThe blackout was responsible for making suddenly shutdown procedures at Marathon refinery. in those procedures, a carbon monoxide boiler failed to shut down correctly, causing a small explosion. As a precautionary measure, the police vacate one-mile sector around the complex.Daimler ChryslerDaimler Chrysler lost production at 14 of its 31 factories. 6 of those were assembly factories with paint shops. The company reported that, in total, 10,000 vehicles were moving through the paint shops during the blackout had to be scrapped.New York CityNew York Citys mayor estimated that the city would pay almost USD 10 m in overtime related to the outage.AirportsAirports were closed in Toronto, Newark, New York, Montreal, Islip, C leveland, Erie and Hamilton. Together they cancelled over 1,000 flights2.1. IntroductionUnder steady state conditions the power generation and the load are balanced and the power systems operate in nominal frequency 50 Hz or 60Hz with some deviations 0.02Hz for the large system and 0.05 for the small system.Taking into consideration the two-machines shown in Fig. 2, the power transmission can be denoted by the following equationWhereES is the voltage of machine SER is the voltage of machine R is the angle by which ES leads ER = QS-QRQS is the rotor angle of machine SQR is the rotor angle of machine RZT is the total impedance between the two machines consisting of ZS, ZR, and ZLZS + ZL + ZRZS is the impedance of source SZR is the impedance of source RZL is the impedance of the transmission lineThe Power angle curve in Figure 3 clears the relation between the power transmit and the angle (the angle between the two ends). The relation clear that the power transmit increase w ith nonlinear direct counterpoise with the angle when lie between 0 90 . After equal 90 the power decrease with nonlinear inverse proportion with the angle . The power system are worked well at the point of maximum power at = 90 so The maximum power is presented as the following equationPower Swing definitionIt is a changing in the Electrical power due to the changing of the rotor angle () any Increasing or decreasing response to line switching, Load disturbances , loss of generation, short circuit faults and other power system disturbances.During the large disturbance in the power system the transmit electric output power suddenly decreased from P0 to Pf as shown in Fig.4 but the mechanical torque (that connected to the generator and equivalent to the output electrical power P0 at the moment before reducing the electrical power) cant reduce suddenly to equivalent Pf so this dissymmetry cases accelerating in the rotor of the machine and increasing in the angle (). The assum e of this analysis is neglects the operation of the voltage regulator that control on the excitation and change the machine voltage, and the governors that change the mechanical input powerIf the fault is cleared at the point of c the output electric power bequeath increase and become greater than the input mechanical power so the machine forget start to decelerate but because of the inertia the machine rotor cant decrease suddenly and reached to e.Assume area 1 refer to the accelerating energy, and area 2 refer to decelerating energy, so when the fault cleared quickly the two areas can be equal before the angle reach to the limiting angle L and the system will return after some oscillation to the last operating point at 0 and that call Stable power swing.On the other side if the fault didnt clear quickly and spend more time, the angle will move far away enough to make the two areas (accelerating area de accelerating area) not equal before the angle reaches to L as shown in Fig. 5 and due to the inertia the the angle will reach to the limiting angle and after this point the electrical output power will decrease again to be less than the mechanical input power so the machine rotor will accelerate and the rotor angle will increase above 180 and the pole slipping will happen . this case called out of step condition or unstable power swing conditionPower Swing Effect on the Distance RelayUnder Steady State Operation the impedance of the load not enter into the operation characteristic of the distance relay but in the case of power swing the load impedance may enter into the operation characteristic of the distance relay and case unwanted tripping for the transmission lines, and may be cause cascading tripping and stoppage of major sections of the power system.The distance relay isnt supposed to tripe under the power swing if stable or unstable to give the system the availability to return to its steady state. A power swing block PSB its a function inside the m odern distance relays that prevent unwanted tripping by block the tripping signal in case of stable or unstable power swing thus, The Power Swing Block function is used to differentiate between the power swing and the fault. However, when the fault happens due to a Power swing it must be cleared very rapidly with high level of dependability and selectivity. The zones must be separated hoping to avoid causing large deference of the rotor angle between groups of the generators and loss the synchronism between them, equipment damage and the blackouts. Perfectly, the power system should be separated into predetermined zones to achieve a balance of load-generation in each of the separated zones. In some cases, load shedding is essential to avoid a whole blackout of the area where the load of the separated area is more than the local generationControlled tripping of the power system relays in the case of an Out-of-Step condition is very essential to prevent extensive outages, equipment da mage and shutdown of large areas in the power system. Out-of-step trip (OST) in is a function that included in the modern relays to achieve the separation of the power system under the unstable power swing. The major aim of this function to differentiate between the stable and unstable power swing and separate the power system into predetermined zones to achieve the stability and continuity of the service.Power Swing Detection Methods.Following is a apprize discussion of the manners that have been used for detecting power swings and schemes used for OSB and OST functions. Traditional method based on rate-of change of impedance and the recently method is Power-Swing-Detection algorithmic program Based on Continuous Impedance Calculation.2.2.1 Traditional Rate of change of Impedance Schemes for Detecting Power Swings.In the conventional method, the relay measure and take the positive sequence impedance and the change rate of the impedance. During the steady sat operation the meas ured impedance depends on the load impedance and the distance between the protection zone of the distance relay and the point of measurement. The impedance move in trajectory depends on the operation case. In the case of the fault if the impedance travel rapidly to the fault zone. On the other case during the power swing the impedance moved slowly at some trajectory with a rate depend on the slip frequency between the generators. Thus, the variation of the impedance movement speed used to distinguish between the power swing and the faults. The concept of this method that using of two measuring impedance and separated them by Z and used a calculated timer. When the measured impedance moved through the first one the timer will start running. If the measured impedance subdue the second impedance before the timer expire, that indicated to a fault case. If the timer expired and the impedance didnt reach to the second impedance that indicated to a power swing case.Two-Blinder Scheme for PSB and OST FunctionsThe two blinded scheme of the rate-of-change of impedance method is used in many relays, separated by Z, and a calculated timer TOSB. The two- protanopic scheme is shown in Fig. 7. This figure shows Two parallel blinders are on the right side of the X-line impedance and another two parallel blinders are on the left side. The timer TOSB is start running when the impedance move through the outer blinderDuring the fault condition the impedance moved rapidly through the outer blinder to the fault zone and cross the inner blinder before the TOSB expire. On the other case during the power swing the impedance moved slowly through the outer blinder and stay between the two blinders even TOSB will expire. This scheme can be used for a power swing blocking function to block the distance relay to prevent unwanted tripping.During Power Swing Blocking declared a reset timer should be used in order to force the relay to frustrate the assert when TOSB expired.The Out-Of-Step tripping (OST) can use the previous scheme expect that the calculated timer for out of step (TOST) is shorter than TOSB. In the case of power swing the impedance locus cross the outer blinder and at this point the timer will start running. If the timer TOST expires before the impedance locus cross the inner blinder, the power swing condition will declare, and if the impedance locus cross the inner blinder before timer TOST expires, the out of step condition will declare. The Out-Of-Step tripping function can be set to tripe instantly or wait for a time. The Instantly tripping referred to as prognosticative tripping or early tripping. The other case is referred to as delayed tripping. In some applications, the tripping is required only when the out of step condition occurs a determined number of times.It is essential for some application to use both OSB and OST functions, and it available to use them in the Same relays using the two blinder scheme technique. According to difference in speed of impedance trajectory in the case of stable power swing and unstable power swing, two timers are required TOSB and TOST whereas TOST is shorter than TOSB to be fit with the rapidly speed of the impedance trajectory in case of unstable power swing2.2.2. Power Swing Detection Algorithm Based on Continuous Impedance CalculationThe traditional methods of power swing detection are depend on a complex study for the power system to reach to the correct settings, but the setting are fixed and not adapt to any change in the system condition because of it is not possible to study the system under unstable power swing. therefore, the power system study doesnt deem the worst cases and the awful conditions, so in the case of power swing or out of step condition it may lead to unwanted tripping.The following method describe below solves these problems. It is based on a continuous impedance calculation 5.This method has the following featuresIt is not required for settings or complex c alculationdetect the power swing with frequencies range from 0.1 10 Hz.Detect the power swing in the case of single-pole open condition or fault condition.Unblocking of distance protection relay if there both faults and power swing.Out-of-step tripping during unstable power swing.The Continuous Impedance Calculation method depend on taking quaternity sample of the impedance per one cycle of the power system frequency the three phase each phase separately. During the power swing the impedance trajectory moved on an oval path, and when it enters the power swing area, as shown in Figure 8, the algorithm of power swing start its analysis for each phase and calculate the power swing area automatically.In the case of power swing, the power swing detection will detect it, and stay active even if the trajectory of the impedance leave the power swing zone. The algorithm computes the new values of R X, and compares them with the previous values that placed in the memory. The main criterias of the power swing detection methods are monotony, continuity and smoothness. The thresholds are calculated dynamically. This automatic adaptability to the trajectory speed change, enables the algorithm to detect the low frequency and the high frequency power swing.Monotony The algorithm will check the direction of the derivat

Mineko Iwasakis Geisha, A Life :: Mineko Iwasaki Geisha, A Life

Mineko Iwasakis Geisha, A Life Geisha is a wonderful book for people who want to learn about Japanese kitchen-gardening and the geisha girl arts. Iwasaki explains the intricacies and politics of the business while telling of her life as a geisha in post-World War II Japan. Reviewer Alyssa Kolsky writes theres something enticing about a book that details the day-to-day minutes of one of the worlds most fascinating, secretive and oldest professions (74).Mineko Iwasaki is a strong willed woman who becomes the return One geisha of Kyotos top geisha house, the Iwasaki oikya. Starting her career at age five, Mineko quickly gains notoriety and overcomes the hurdles that come with being a geisha. She retires at age 29 after fourteen years as Japans most famous geisha.People experienced with Japanese culture might find the narration too simple and straight-forward, but beginners will gain a wealth of knowledge. As Mineko describes her life in the oikya, she also includes the histories of the Gion Kobu order where she lived, and the women in the oikya, along with the details of the social-political structure between geishas, their clients, and the businesses that support the geisha arts.Some readers might also find Geisha a little dispassionate for their tastes. Her lack of reflection and tendency toward mechanical description make the work more of a manual than a memoir, (56) writes Sarah Gold and Mark Rotella. An anonymous observer for Kirkus Reviews describes a number of passages as quite a mouthful for the uninitiated (1198).Despite Iwasakis writing style, Geisha is a wonderful book for fans of the geisha arts and women rising above obstacles that stand in their way.ResourcesGeisha, A Life (Book) Kirkus Reviews.

Education for citizenship is important because every society needs Essa

Education for citizenship is important because every society needs the great unwashed to contribute effectively, in a variety of ways, to the future health and wellbeing of communities and the environment, loc eithery, interior(a)ly and globally.Rationale for citizenshipEducation for citizenship is important because every society needs pack to contribute effectively, in a variety of ways, to the futurehealth and wellbeing of communities and the environment, locally,nationally and globally. Fostering active and responsible citizenscontributes to the process of developing a sanitary and vibrant cultureof democratic participation. Whilst all individuals share the rightsand responsibilities of citizenship, regardless of status, knowledgeor skill, it is die that citizenship may be exercised with differentdegrees of effectiveness. The opportunities for learning that areprovided in primary precept make important contributions to theprocess of educating for active and responsible citizens hip. At thesame time, the contributions of formal education need to be seenalongside, and in interaction with, parents, carers and the media andopportunities for community-based learning. Also, primary schools needto take account of the diversity of the local communities in whichyoung people live.Aims of the topicThe rights and responsibilities of citizens are reciprocal in manyrespects. If we all have a right to be treated with respect, then itfollows that we have a clear obligation to treat all others withrespect. If we all have a right to a say on matters that affect ourlives, then we have a responsibility to attend to the views of otherson matters that also affect them. However, it is also clear thatper... ...rnes.Holden, C. (2003) Citizenship in the Primary school Going BeyondCircle Time. Pastoral care in Education, 21 (3),24-29Kerr, David.(1998). Citizenship education in primary schools anational survey commissioned by the Institute for Citizenship Studiesabout opportunitie s for citizenship education and communityinvolvement in primary schools, final report . QCAKlein, Reva . (2001) Citizens by right citizenship education inprimary schools Stoke-on-Trent Trentham and Save the Children.Lister, I. (1984) Teaching and learning about human rights. StrasbourgCouncil of Europe.Starkey, H. (1992) Back to Basic Values Education for justice andpeace in the world, ledger of Moral Education, 21(3), 195-92United Nations.(1989) Teaching human rights practical activities forprimary and secondary schools. New York United Nations.