Saturday, February 29, 2020

A Biography Of Sir James Chadwick History Essay

A Biography Of Sir James Chadwick History Essay James Chadwick, a remarkable man, may rank among the greatest of all experimental nuclear physicists and he may have played a pivotal role in the development of the atom bomb. James Chadwick had many achievements – Nobel Prize, wartime knighthood, Master of Gonville and Caius, Companion of Honor à ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ã¢â‚¬  but was a troubled, hyper-tense human being, capable of love and anger as well as restraint. Chadwick was born in Bollington, not far from Manchester, England, on October 20, 1891, to John Joseph Chadwick and Ann Mary Knowles. Chadwick senior owned a laundry business in Manchester. At the age of sixteen, Chadwick won a scholarship to the University of Manchester, where he had intended to study mathematics. However, because he was mistakenly interviewed for admittance to the physics program and was too shy to explain the error, he decided to stay in physics. Initially Chadwick was disappointed in the physics classes, finding them too large and noisy. But in h is second year, he heard a lecture by experimental physicist Ernest Rutherford about his early New Zealand experiments. Chadwick established a close working relationship with Rutherford and graduated in 1911 with first honors. Chadwick stayed at Manchester to work on his master’s degree. During this time he made the acquaintance of others in the physics department, including Hans Geiger and Niels Bohr. Chadwick completed his M.S. in 1913 and won a scholarship that required him to do his research away from the institution that granted his degree. At this time Geiger returned to Germany, and Chadwick decided to follow him. Chadwick had not been in Germany long when World War I broke out. Soon he was arrested and sat in a Berlin jail for ten days until Geiger’s laboratory interceded for his release. Eventually Chadwick was interned for the duration of the war, as were all other Englishmen in Germany. Chadwick spent the war years confined at a race track, where he shared w ith five other men a stable intended for two horses. His four years there were quiet, cold, and hungry. He managed to maintain correspondence with Geiger. Although the work he did under such harsh conditions was not very fruitful, Chadwick felt that the experience of internment contributed to his maturity. Moreover, when Chadwick returned to England, he found that no one else had made much progress in nuclear physics during his time away. His careful self-humbleness, though, kept him from the limelight, and his primary role over the next 20 years was as Rutherford’s assistant. They had a complex relationship where Chadwick was confidant, critic and counselor as well as general factotum (laborer) for the great man, particularly during their long association at the Cavendish Laboratory in Cambridge. One of Chadwick’s first tasks was to help Rutherford establish a unit of measurement for radioactivity, to aid in experiments with the radiation of atomic nuclei. Chadwick th en developed a method to measure radioactivity that required the observation of flashes, called scintillations, in zinc sulfide crystals under a microscope and in complete darkness. Chadwick and Rutherford spent much time experimenting with the transmutation of elements, attempting to break up the nucleus of one element so that different elements would be formed. This work eventually led to other experiments to gauge the size and map the structure of the atomic nucleus.

Thursday, February 13, 2020

Factoring Essay Example | Topics and Well Written Essays - 250 words

Factoring - Essay Example Even though, it was not highly developed in the early centuries, major improvements have taken place in the 18th, 19th and 20th centuries. The factoring of Greatest common factors was developed in a mounting manner, with the leaders embracing it. Factoring was a royal sport which, Kings sponsored inform of contests, and the ones who emerged best in Europe went from court to court to display their skills. Techniques of trinomial factoring were secrets that were closely guarded, and topics of betrayals and intrigues. According to Mano, (pg 16) it was also developed because it helps in proving theorems in the modern number theorem such as unique factorization. It also made the computation of GCD of big numbers more efficient since it does not require more steps in division than five times the digits number (base 10) of the lesser integer. Trinomial factoring is generally aimed at improving complex integral operations and making them simpler. In medical fields, Fractional trinomials have been suggested in studies involving epidemics to investigate functional forms of continuous predictor variables. In clinics, it has been more desirable categorize patients into various prognosis groups. E.g. children, youths and adults, or diagnosis groups .E.g. ulcer, tumor and cancer. Medical distributional measures like lower, middle and upper quartile is usually done in classified age groups (e.g. 15-20, 21-25†¦). It makes hospital operations involving numbers easier than when done in other ways. Man, Carlos. "The History of Polynomial Factoring | eHow.com." eHow | Articles & More - Discover the expert in you. | eHow.com. N.p., n.d. Web. Nov. 2012.

Saturday, February 1, 2020

Work Performance and Employee Well Being Essay Example | Topics and Well Written Essays - 500 words

Work Performance and Employee Well Being - Essay Example Work performance and well-being of an employee have a cause and effect relationship with each other that runs both ways. Well-being is both a cause and effect of good work performance. On one hand, when an employee is psychologically and physically healthy, he/she is able to deliver his/her best at work and thus his/her work performance is enhanced. On the other hand, good performance at work leads to better reputation of the employee in the organization so that the employee feels good while at work. Similarly, good work performance is both a cause and effect of well-being. When an individual shows good performance at work, he/she finds interest in work. This interest helps him/her work hard so that he/she earns the trust and confidence of the employer. As a result of this, the owner appreciates the efforts of the employee by rewarding him/her through increase of wages, additional benefits with wage, and/or a higher position in the workplace. â€Å"People’s experiences at work affect how they feel about themselves, how they interact with their families and friends, how they use their leisure t ime, how anxious they are about the future and so on† (Fairhurst and O’Connor, n.d., p. 2). Any kind of reward increases the level of happiness of the employee and the employee’s overall well-being is enhanced. Work performance of an individual is an outcome of several variables that include but are not limited to the physical and mental health of the employee, the eligibility and competence of the employee in the work, the employee’s qualification and experience in the similar kind of work, and most importantly, the employee’s level of motivation. Of all of these factors, employee’s well-being is the most fundamental factor that affects his/her performance because if an employee does not feel well, he/she might not arrive at the work at the first place. â€Å"Having healthy employees is