Composites Science and Technology 61 (2001) 1253–1264 www.elsevier.com/locate/compscitech Preparation‚ structure‚ properties and thermal behavior of rigid-rod polyimide/montmorillonite nanocomposites Rathanawan Magaraphan a‚*‚ Wittaya Lilayuthalert a‚ Anuvat Sirivat a‚ Johannes W. Schwank b a The Petroleum and Petrochemical College‚ Chulalongkorn University‚ Bangkok 10330‚ Thailand b University of Michigan‚ Ann Arbor‚ Michigan‚ USA Received 10 August 1999; received in revised form 20 November
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some charge to pass through them are called Semi-Conductors. 4. Free Electron Those electrons that are loosely bound by their atom and can move freely within the material are called free electrons. 5. Dielectric The medium or space (vacuum) between two charges is said to be dielectric. 6. Force of Attraction When two charges attract each other the force is called force of attraction. It has a negative sign. 7. Force of Repulsion When two charges repel each other the force is called
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www.visionias.cfsites.org www.visionias.wordpress.com IAS PHYSICS Main – Syllabus Paper- I: Section-A 1. Classical Mechanics (a) Particle dynamics Centre of mass and laboratory coordinates‚ conservation of linear and angular momentum. The rocket equation. Rutherford scattering‚ Galilean transformation‚ intertial and non-inertial frames‚ rotating frames‚ centrifugal and Coriolis forces‚ Foucault pendulum. (b) System of particles Constraints‚ degrees of freedom‚ generalised coordinates and momenta
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Mbps | Gigabit Ethernet | 6a | 10‚000 Mbps | Gigabit Ethernet | 4.1.5 Exercise: 4.1.6 Exercise: * ‚ The central layer comprises of a conducting material. This layer transmits the baseband video signal. * The dielectric layer surrounds the centre copper core. The function of the dielectric is to separate the inner conductor from the shield and provide physical support. * The next layer is the metallic shield‚ generally composed of braided copper. It has two main purposes: to protect the conductor
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color code used for each. 6. Explain the procedures for crimping terminal lugs with a hand crimp tool. 7. Recall the physical description and operating procedures for the HT-900B/920B compressed air/nitrogen heating tool. 8. Recall the safety precautions for using the compressed air/nitrogen heating tool. 9. Recall the procedures‚ precautions‚ and tools associated with soldering. 10. Explain the procedures and precautions for tinning wire. 11. Recall the types of soldering irons and their uses. 12. State
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REDTACTON:: • Technology is making many things easier. • Nippon Telegraph and Telephone Corporation(NTT‚ headquartered in Chiyoda-ku‚ Tokyo. President and CEO‚ Norio Wada) is pursuing research and development of an innovative Human Area Networking technology called “RedTacton”. • REDTACTON safely turns the surface of the human body into a data transmission path at speeds up to 10 Mbps between any two points on the body. • REDTACTON uses the minute electric field emitted on the surface of
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and control the reliability risks. Based upon the consensus of the Reliability Technical Advisory Board (RTAB)‚ the top five issues that deserve the most attention are high-k gate dielectrics‚ metal gate‚ copper/low-k interconnects‚ packaging‚ and design and test for reliability. Within high-k gate dielectrics‚ metal gate‚ copper/low-k interconnects‚ the introduction of new materials‚ processes‚ and devices presents challenges. Bulk material and interface properties usually define the intrinsic
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Electromagnetic spectrum The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation.[4] The "electromagnetic spectrum" of an object has a different meaning‚ and is instead the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. The electromagnetic spectrum extends from below the low frequencies used for modern radio communication to gamma radiation at the short-wavelength (high-frequency) end‚ thereby covering
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TRANSACTIONS ON ELECTRICAL AND ELECTRONIC MATERIALS Vol. 11‚ No. 3‚ pp. 93-105‚ June 25‚ 2010 Invited Paper pISSN: 1229-7607 eISSN: 2092-7592 DOI: 10.4313/TEEM.2010.11.3.093 Challenges for Nanoscale MOSFETs and Emerging Nanoelectronics Yong-Bin Kim Department of Electrical and Computer Engineering‚ Northeastern University‚ Boston‚ MA 02115‚ USA Received April 26‚ 2010; Accepted May 3‚ 2010 Complementary metal-oxide-semiconductor (CMOS) technology scaling has been a main key for continuous progress
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Electromagnetic waves in space See the book “Optics” by Hecht sections 3.2 and 3.3 Speed of light: EM waves travel in a vacuum with speed c = c = 299‚792‚458 ms-1 exactly They are transverse waves with (vector) E and B field orthogonal to each other‚ for this section bold indicates vector quanties. When far from the source (many wavelengths) the E and B fields are in phase The vector E x B points in the direction of motion Travelling waves can be written as E = E 0 ⋅ ei ( kx −ωt ) and B = B 0 ⋅ ei
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