tightly packed; these are possibly structures: -hexagonal close-packed structure (hcp): -cubic close-packed structure (ccp): -edge length/radius are related: -sc: a = 2r -bcc: a = 4rt( r )/rt (3) or a = 2.309r -fcc: a = r*rt(8) X-ray Diffraction: they utilize the scattering of X-rays to determine the structure of an atom Bragg’sLaw: 12.4- Types of Crystals ionic crystals -composed of anions/cations -held together by coulomb forces -anions are generally bigger than cations -size
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3.1 & 3.2 Chemistry Notes Dalton * In 1805‚ John Dalton reintroduced the idea to explain 3 fundamental principles Experimental Work * Atoms of different elements have different properties * Law of definite proportion and multiple compositions: atoms of 2 or more elements can combine in a fixed ratio to form new substances depending on their combining capacities (eg. H2O vs H2O2) * Law of conservation of mass: atoms cannot be created or destroyed during a chemical reaction
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SUPERADHERENT HARD COATINGS BY ION BEAM ENHANCED DEPOSITION 1. COVER SHEET (see attached) 2. IDENTIFICATION & SIGNIFICANCE OF THE OPPORTUNITY The objective of this proposal is to demonstrate the feasibility of producing super adherent protective coatings at low processing temperatures using energetic ion beams in conjunction with conventional deposition techniques. This process‚ coined Ion Beam Enhanced Deposition (IBED)‚ is depicted in Figure 1 and promises a new generation of exotic coatings
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CHHATTISGARH SWAMI VIVEKANAND TECHNICAL UNIVERSITY Courses of Study and Scheme of Examination of B.E. First Year (2012-13) Common to all branches of Engineering except Bio-Tech. & Bio-Medical Engg. FIRST SEMESTER S. No Board of Study Subject Code Subject Periods Per Week Scheme of Examination Total Marks Credit [L+[T+P]] 2 Theory L T P ESE CT TA 1 Basic Sciences 300114(14) Applied Mathematics-I 4 1 - 80 20 20 120 5 2 Humanities 300111(46) Professional Communication
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education MARK SCHEME for the October/November 2010 question paper for the guidance of teachers 0625 PHYSICS 0625/32 Paper 3 (Extended Theory)‚ maximum raw mark 80 This mark scheme is published as an aid to teachers and candidates‚ to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions
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Large Scale Fading and Channel modeling Using Matlab March 2012 Large scale fading and channel modeling Using Matlab Introduction The fading phenomenon can be broadly classified into two different types: large-scale fading and small-scale fading. Large-scale fading occurs as the mobile moves through a large distance‚ for example‚ a distance of the order of cell size . It is caused by path loss of signal as a function of distance and shadowing by large objects such as
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Antennas & Propagation CS 6710 Spring 2010 Rajmohan Rajaraman Introduction An antenna is an electrical conductor or system of conductors o Transmission - radiates electromagnetic energy into space o Reception - collects electromagnetic energy from space In two-way communication‚ the same antenna can be used for transmission and reception Radiation Patterns Radiation pattern o Graphical representation of radiation properties of an antenna o Depicted as two-dimensional
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OTHER TYPES OF THE NUCLEAR TECHNOLOGY APPLICATIONS THAT HAVE THE POTENTIAL TO EVOLVE IN SOUTH AFRICA AND WHY THIS WOULD BE FEASIBLE South Africa as a developing country and is one of the world leader in supplying food and raw material. It has very a lot of arable land and large reserves of natural resources. The warm climate favours the production of most crops and livestock which is in demand by the population. The country’s economic backbone lies between the performance of the mining and agricultural
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Taj Mahal - The Taj - is the "King Emperor" amongst the World Wonders. The Taj is the final achievement and acme of the Mughal Art. It represents the most refined aesthetic values. It is a fantasy-like grandeur. It is the perfect culmination and artistic interplay of the architects’ skill the jewellers’ inspiration. The marble in-lay walls of the Taj are amongst the most outstanding examples of decorative workmanship. The elegant symmetry of its exterior and the aerial grace of its domes and minarets
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Marie Curie was a famous Polish chemist. Marie and her husband Pierre Curie were early researchers in radioactivity. She received her first Nobel Prize in 1903 for physics‚ together with Pierre and Henri Bequerell‚ for research in the area of radioactivity. In 1911‚ she was given a second Nobel Prize in Chemistry for her work in discovering radium and polonium. Discovery of Radium and Polonium Marie Curie received the Nobel Prize in Chemistry in 1911 for her discovery of radium and polonium. She
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