electrical conductance

Xem 1-20 trên 50 kết quả electrical conductance
  • Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: Electrical Conductivity of Chlorophyll with Polythiophene Thin Film on Indium Tin Oxide as P-N Heterojunction Solar Cell

    pdf16p hoami_266 15-09-2011 36 6   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Influence of surface properties on the electrical conductivity of silicon nanomembranes

    pdf7p sting04 08-02-2012 20 6   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Electrical Conductivity Studies on Individual Conjugated Polymer Nanowires: Two-Probe and Four-Probe Resu

    pdf6p dauphong17 21-02-2012 27 4   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Study on the Electric Conductivity of Ag-Doped DNA in Transverse Direction

    pdf6p sting09 21-02-2012 24 3   Download

  • semiconductors.In the first category are substances which provide an easy path for an electric current. All metals are conductors, however some metals do not conduct well. Manganin, for example, is a poor conductor. Copper is a good conductor, therefore it is widely used for cables. A non-metal which conducts well is carbon. Salt water is an example of a liquid conductor. A material which does not easily release electrons is called an insulator. Rubber, nylon, porcelain and air are all insulator. There are no perfect insulators.

    pdf95p augi19 01-03-2012 253 84   Download

  • Special Symbols α-level set a crisp set of elements belonging to a fuzzy set A at least to a degree α Aα = {x ∈ X | µA (x) ≥ α} See also crisp set, fuzzy set. f hertz. common symbol for bandwidth, in µ0 common symbol for permeability of free space constant. µ0 = 1.257 × 10−16 henrys/meter. common symbol for relative permeµr ability. ω common symbol for radian frequency in radians/second. ω = 2 · π · frequency. common symbol for positive transition θ+ angle in degrees. common symbol for negative transiθ− tion angle in degrees. common symbol for conduction...

    pdf751p chuhop 23-09-2010 72 23   Download

  • Materials are important to mankind because of the benefits that can be derived from the manipulation of their properties, for example electrical conductivity, dielectric constant, magnetization, optical transmittance, strength and toughness. Materials science is a broad field and can be considered to be an interdisciplinary area. Included within it are the studies of the structure and properties of any material, the creation of new types of materials, and the manipulation of a material's properties to suit the needs of a specific application....

    pdf0p cucdai_1 16-10-2012 38 18   Download

  • If we connect a battery across a body, there is a movement of free electrons towards the positive end. This movement of electrons is an electric current. All materials can be classified into three groups according to how readily they permit an electric current to flow. These are: conductors, insulators, and semiconductors. In the first category are substances which provide an easy path for an electric current. All metals are conductors, however some metals do not conduct well. Manganin, for example, is a poor conductor. Copper is a good conductor, therefore it is widely used for cables.

    doc58p cancuongchi 03-08-2012 163 61   Download

  • Properties of CNT: • Electrical : – High electric conductivity (higher than copper) – Easy process for Conductive Semi-conductive • Thermal : – High thermal conductivity (higher than silicon) – Stable at high temperature • Physical : – 100 times stronger than steel but very light – Elastic behavior (Pressing CNT tip bend and recover to its original state) • Chemical : – Rarely react with other compounds – Chemically stable

    ppt43p 44a88888 09-05-2010 80 29   Download

  • This third volume of the book series Lessons In Electric Circuits makes a departure from the former two in that the transition between electric circuits and electronic circuits is formally crossed. Electric circuits are connections of conductive wires and other devices whereby the uniform ow of electrons occurs. Electronic circuits add a new dimension to electric circuits in that some means of control is exerted over the ow of electrons by another electrical signal, either a voltage or a current....

    pdf486p ndkhuong177 14-07-2012 71 26   Download

  • A semiconductor material has a resistivity lying between that of a conductor and that of an insulator. However, in contrast to the granular materials used for resistors, a semiconductor establishes its conduction properties through a complex quantum mechanical behavior within a periodic array of semiconductor atoms, i.e., within a crystalline structure.

    pdf32p vongbithep 21-12-2009 89 18   Download

  • Physical properties of metals, ceramics, and polymers, such as ductility, thermal expansion, heat capacity, elastic modulus, electrical conductivity, and dielectric and magnetic properties, are a direct result of the structure and bonding of the atoms and ions in the material. An understanding of the origin of the differences in these properties is of great engineering importance.

    pdf24p liemthanh 16-12-2009 70 11   Download

  • The Chemistry of Silver Copper, silver, and gold form group 1B of the periodic table, and together they are known as the ‘coinage metals’. Silver, like gold and the six platinum group metals (platinum, palladium, rhodium, ruthenium, iridium, and osmium), is a noble metal. Silver has the highest electrical conductivity and the highest thermal conductivity of any metal, as well as the lowest electrical contact resistance (Table 1).

    pdf7p congdat261 02-12-2010 50 11   Download

  • Textbooks on radio antennas and propagation have changed little over the last 50 years. Invariably they base themselves on the famous electromagnetic equations described by James Clerk Max- well, a great nineteenth-century genius of theoretical physics (Torrance, 1982). Maxwell's equations brilliantly encompassed all the electromagnetic phenomena known by his time (except photo- electric long-wave cut-off, which remained ...

    pdf269p tiramisu0908 16-10-2012 36 10   Download

  • Research and development in bioengineering and medical technology, conducted during recent decades, have led to spectacular progress in clinical medicine. These achievements have triggered an enormous increase in the number of courses offered in the areas of bioengineering, clinical technology and medical informatics; nowadays, most major universities offer curricula oriented towards these fields. The majority of participants however come from engineering backgrounds and so modules dealing with basic biological and medical sciences have been included.

    pdf378p hyperion75 22-01-2013 22 8   Download

  • The origin of the electrolytic capacitor or condenser can be traced to the second half of the 19th century when the discovery was made (Wheatstone, Buff, Ducretet) that a film can be formed on aluminum electrochemically and that it will exhibit unidirectional electrical conductance and other peculiar properties. One of the early attempted applications of the electrolytic capacitor was in conjunction with the starting of single-phase induction motors; efforts were also made to utilize it for power factor correction in alternating current circuits.

    pdf205p culao1122 08-01-2013 26 7   Download

  • White et al. Nanoscale Research Letters 2011, 6:346 http://www.nanoscalereslett.com/content/6/1/346 NANO REVIEW Open Access Investigation of the electrical conductivity of propylene glycol-based ZnO nanofluids Steven Bryan White*, Albert Jau-Min Shih and Kevin Patrick Pipe Abstract Electrical conductivity is an important property for technological applications of nanofluids that has not been widely studied.

    pdf5p dauphong13 09-02-2012 31 6   Download

  • Continuing work by Atraverda on the production of a composite-laminate form of the Ebonex® material, that can be cheaply formulated and manufactured to form substrate plates for bipolar lead–acid batteries, is described. Ebonex® is the registered trade name of a range of titanium suboxide ceramic materials, typically Ti4 O7 and Ti5 O9 , which combine electrical conductivity with high corrosion and oxidation resistance. Details of the structure of the composite, battery construction techniques and methods for filling and forming of batteries are discussed.

    pdf9p congdat261 19-11-2010 70 5   Download

  • The design, construction and testing of valve-regulated lead/acid cells with grid designs optimised for high-rate partial state-of-charge cycling for hybrid electric vehicles are described. Computer modelling was used to develop the grid designs. This showed that designs with opposed tabs and terminals on the top and bottom of the cell were likely to have the best performance not only in terms of grid conductivity but also for uniformity.

    pdf5p congdat261 19-11-2010 50 4   Download

  • The historical route to present-day patch clamping started with the scientific recognition that electrical phenomena are part of animal physiology. This bioelectricity was demonstrated in the nineteenth century in frogs, where muscle movements could be evoked by applying electrical stimuli to the animal. The recording of inherent electrical activity can be charted by the development of increasingly sophisticated electrodes.

    pdf0p thienbinh1311 13-12-2012 22 4   Download


Đồng bộ tài khoản