MCNP Simulation of LWD Neutron and Gammadensity Logs Libai Xu‚ Dan Speaker‚ and Ashraf Shehata Center for Engineering Applications of Radioisotopes North Carolina State Univeristy September 6th 2006 Outline Introduction GR-Density tool simulations Neutron Porosity tool simulations Analysis and Discussions Conclusions Introduction shale Formation Environments Sandstone bed (4ft) sandwiched by shale Thinly laminated sand-shale • Sand or shale thickness is 3”
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Week 2 Quiz Which of these is NOT one of the four general categories of cells that make up the human body? collagen cells muscle cell neuron connective tissue cell epithelial cells What is the term for the developmental process that leads to specialized cell types? homeostasis differentiation positive feedback genomics acclimatization If a person begins to sweat upon entering a hot room but continued sweating is able to keep the body temperature constant‚ which of these best
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Market Structures Simulation Paper Market Structures Simulation Paper The University of Phoenix – Simulation exercise regarding the company – Quasar who manufactures the “Neutron” Computer. The company was granted a three year monopoly due to its’ patented rights in the year 2003 (University of Phoenix‚ 2009). The Four market models/structures that the learning team is expressing knowledge of are: Pure Competition‚ Pure Monopoly‚ Monopolistic Competition and Oligopoly. The strategic variables
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have the same number of Chemistry 161 a. protons. Sample Quiz Chapters 1&2 KEY b. electrons. c. neutrons. Harold d. isotopes. 11. How many protons‚ neutrons‚ and electrons are in one atom of e. nucleons. 119 50 p 69 n 50 e- 50Sn? S2- 12. What is the symbol of the species that has 16 protons and 18 electrons? 13. An atom that has the same number of neutrons as 58 a. 59Ni. b. 57Co. c. 60Cu. d. Fe. 59 Co is e. 58 Ni. 59 Co has 59-27 = 32 n
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isotope (element with a different number of neutrons in the nucleus) is radioactive‚ because its nucleus is unstable. In time it decays and emits alpha or beta particles‚ they collide with surrounding atoms and make them move faster‚ that provokes thermal energy. That thermal energy released is around a million times bigger than from a chemical change. But the rate of decay is usually very slow. So what Nuclear power plants do is to bombard the nucleus with neutrons‚ to make it more unstable and so the
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particles that play the greatest role in cellular chemical reactions are electrons. protons. neutrons. isotopes. 0 out of 5 The correct answer is: electrons. Question 2 of 20 The structural unit that retains the properties of an element is the molecule. atom. cell. electron. 5 out of 5 Correct!! Question 3 of 20 Which of the following are found in the nucleus of an atom? Protons Neutrons Electrons A and B 0 out of 5 The correct answer is: A and B Question 4 of 20 The component
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Leo Szilard‚ a Hungarian scientist‚ began research discovering the possibility to use the neutron of an atom to split the nucleus into smaller parts‚ resulting in two different elements and energy. This process was called fission‚ and it was the basis for the atomic weapons designed and created for use in the Second World War. In early 1939‚ German physicists found a way to split a uranium atom‚ paving the way to atomic weaponry. Out of fear from the power in the enemy hands‚ Albert Einstein
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INTRODUCTION Radiation‚ flow of atomic and subatomic particles and of waves‚ such as those that characterize heat rays‚ light rays‚ and X rays. All matter is constantly bombarded with radiation of both types from cosmic and terrestrial sources. This article delineates the properties and behaviour of radiation and the matter with which it interacts and describes how energy is transferred from radiation to its surroundings. Considerable attention is devoted to the consequences of such an energy
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Matter: anything that has mass and takes up space Particle Theory: the scientific statements that summarize about particles of matter 1. All matter is made up of particles that contain spaces between each particle 2. Different substances are made up of different types of particles 3. Particles are always in constant motion 4. The movement of particles will increase if temperature rises 5. Particles are attracted to each other Pure substance: a substance that consists of only 1 type of particle
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invention. (Silverstein‚ 31) In 1898‚ the Curies discovered the element of Radium and from then on America would never be the same. Radium found its way into paint‚ candles‚ and eye washes. In 1938; however‚ Otto Hahn-a German chemist and physicist-fired neutrons at uranium atoms and succeeded in splitting an atom for the first time‚ this event would ultimately change the entire course of human
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