Cockcroft, John

Cockcroft-Walton Generator Named after John Douglas Cockcroft (1897-1967)... 

Pulse pressure is another important consideration for you and your physician. Pulse pressure is essentially the difference between the systolic and diastolic pressure readings. Dr. John Cockcroft, an international authority on blood pressure and hypertension at the University of Wales College of Medicine in the United Kingdom, provided a dramatic example of this in an interview featured on Medscape Cardiology, an Internet service for cardiologists and others specializing in heart health. He explained that if you look at the risk of a cardiovascular event such as a heart attack or a stroke in people with a rise of about 20 mm Hg in systolic blood pressure, the risk is not as great as that from a 20 mm Hg rise in pulse pressure. Dr. Cockcroft said that pulse pressure is often a far better predictor of risk than either systolic or diastolic blood pressure alone. 

Be that as it may, we know today that a major factor leading to arterial stiffening and subsequent hypertension is an inadequate supply of NO in the endothelium. As noted by the international hypertension authority Dr. John Cockcroft in the United Kingdom, since NO is now known to regulate, at least in part, stiffening in the arteries, therapeutic efforts to increase NO availability may prevent or reverse the problem. 

Anthony J. Leggett 1951 John Cockcroft, Ernest T.S. Waiton... 

Physicists took to designing devices to accelerate charged particles in an electric field, forcing them to move faster and faster and therefore to possess more and more energy. The English physicist John Douglas Cockcroft (1897- ) and his co-worker,... 

Cockcroft-Walton ganarator The first proton accelerator a simple linear accelerator producing a potential difference of some 800 kV (d.c.) from a circuit of rectifiers and capacitors fed by a lower (a.c.) voltage. The experimenters. Sir John Cockcroft and E. T. S. Walton (1903-95), used this device in 1932 to achieve the first artificially induced nuclear reaction by bombarding lithium with protons to produce helium ... 

Cockroft-Walton accelerator (John Douglas Cockcroft and Ernest Thomas Sinton Walton) The Gockcroft-Walton accelerator is used to fling charged particles at atomic nuclei in order to investigate their properties. 

English physicist Sir John Cockcroft and Irish physicist... 

Dunworth, drew on U.S. work to prepare reports on the potential uses of isotopes in medicine. Dunworth had been a graduate student and instructor at Cambridge University in England. Mitchell, a professor of radiotherapeutics at Cambridge, had been recruited by John Cockcroft, head of the NRC atomic research project, to help set up a biomedical program in 1944. He published an article based on the earlier reports late in 1946. It ranked the isotopes that could be produced in reactors according... 

American physicist Ernest O. Lawrence developed the atomic particles. Another important device developed during this era was the particle accelerator. Both devices enable scientists to study the motions of atomic particles—an important step in creating fission. Two British scientists, John Cockcroft and Ernest Walton, built the particle accelerator... 

The outstanding success of the early atomic programme can be put down to many factors, but certainly one was the leadership provided by three men John Cockcroft,... 

John Cockcroft was born in Todmorden, Yorkshire, where his father had inherited a family business in dire financial straits. He was educated at a local church school then Todmorden Elementary School, moving on to Todmorden Secondary... 

Whilst at Cambridge, Cockcroft also began to show his talents as an administrator, both as Junior Bursar in St John s College and in the construction of the Mond Laboratory. At the outset of war, he moved into work on radar, as did so many other British scientists at the time, but was also a member of the military apphcation of uranium detonation (MAUD) committee, which met to consider Peierls and Frisch s memorandum on atomic explosions. In 1944, he took over the atomic energy programme in Canada, and was responsible for the building of the NRX heavy water reactor at Chalk River, but came back to Britain in 1945 to head the new atomic establishment to be built in Britain. 

During the early Fifties he had the delicate job of smoothing relations between Risley and Harwell at a time when Sir John Cockcroft s and Sir Christopher... 

Figure 3.4. Visit of Georgy Malenkov, Soviet politician, to Harwell in April 1956. Left to right Georgy Malenkov, Sir John Cockcroft and Sir Edwin Plowden, Chairtnan of the AEA. (Image courtesy...

Mark LE Oliphant and Lord Penney (1968). John Douglas Cockcroft. 1897-1967 , Biographical Memoirs of Fellows of the Royal Society 14, 139-188. 

TNA PRO AB 17/293. The Atomic Energy Research Programme. Sir John Cockcroft, January 1960. 

J.J. Thomson and Sir John Cockcroft WiU my right Hon. Friend discuss with the authorities how they can ensure either that there are no leaks in anticipation of statements or that there are earher statements of such successes ... 

Sir John Cockcroft described the need for these new reactors when writing to the Treasury requesting funds for the PLUTO reactor as follows ... 

Sir John Cockcroft s deputy at Harwell until becoming Professor of Physics at Liverpool University in 1949. 

Towards the end of 1955 a Research Committee was formed to define and investigate the main problems of the Sodium Graphite Reactor. The Chairman of the Committee was Sir John Cockcroft and members were drawn from the staffs of the Research Group and the Industrial Group. At the end of the Research Study (October, 1956) the Committee issued an Interim Technical Assessment which recommended that the work should continue as a Design Study. ... 

TNA PRO AB 16/1441. Pressurised Ught water cooled and moderated reactor (LEO) design study. Atomic Energy Executive Committee Co-operation with Industry. Sir John Cockcroft, 29 January 1954. 

TNA PRO AB 16/1379. Marine propulsion naval reactor for Admiralty submarine. John Cockcroft to Edwin Plowden, 22 November 1955. 

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