Author offers and researches a new idea - filling tubes by electronic gases. He shows: If the insulating envelope (cover) of the tube is charged positively, the electrons within the tube are not attracted to covering. Tube (as a whole) remains a neutral (uncharged) body. ...
E-print Network
An extended and systematic ab initio investigation of the energetics, structural, electronic, optical and Raman-active properties of heavily Li-doped ultrathin 4 � diameter carbon nanotubes of different chiralities has been performed. A number of new features not discussed earlier are observed in the present study. Our values for the binding energies of ...
NASA Astrophysics Data System (ADS)
... Title : CALCULATIONS OF LOSS OF HEAD IN HEATED TUBES AT SUPERHIGH PRESSURES (p = 230-350 (Atm(abs.))). ...
DTIC Science & Technology
... ELECTRONIC TUBE TECHNOLOGY-MICROWAVE TUBES. ... ELECTRON TUBES, *FREQUENCY MULTIPLIERS, *MICROWAVES, *WAVEGUIDES ...
... limit of the tube envelope is ... were made, and the tubes tested appeared ... Descriptors : *STORAGE TUBES, DISPLAY SYSTEMS, ELECTRON TUBES ...
... AD) 142061 TECHNIQUES FOR APPLICATION OF ELECTRON TUBES ... AD 142061 TECHNIQUES FOR APPLICATION OF ELECTRON TUBES ...
Ab initio calculations reveal distinct electronic properties associated with side wall functionalization of SWNTs. The metallic tubes are found to be more reactive than the semiconducting ones. The hybridization between the addend and the tube induces unique impurity states near the Fermi level. For semiconducting ...
Ab initio calculations reveal distinct electronic properties associated with functionalized single-wall carbon nanotubes (SWNTs) with monovalent sidewall additions. The metallic tubes are found to be more reactive than the semiconducting ones. The hybridization between the addend and the tube induces unique ...
... Descriptors : , RESOLUTION, STORAGE TUBES, ELECTRON TUBE COMPONENTS, ELECTRON BEAMS, CATHODE RAY TUBE SCREENS ...
... Descriptors : *IMAGE TUBES, MINIATURE ELECTRON TUBES, MANUFACTURING ... MULTIPLIERS, ELECTRON TUBE COMPONENTS ...
... Title : TUNNEL CATHODES FOR MICROWAVE TUBES. ... CATHODES( ELECTRON TUBES), *FIELD EMISSION, ELECTRON TUBE COMPONENTS ...
... OF HIGH TEMPERATURE MICROWAVE TUBE DESIGN AND ... ELECTRON TUBES), *ELECTRON TUBES, *MICROWAVE EQUIPMENT, ALLOYS ...
ABS>Processes involved with electron beam melting of refractory metals are discussed. Information is included on electron beam furnaces, production costs for Ta ingots, Ti ingot production costs, energy requirements for steel strip coating, cost of Al deposition on steel strip, and electron beam ...
Energy Citations Database
The individual counting rates of the three tubes are telemetered separately; also, double coincidences AB and triple coincidences ABC with a resolving time ...
NASA Website
By using ab initio density functional theory, the structural characterizations and electronic properties of two large-diameter (13, 13) and (14, 14) armchair silicon carbide nanotube (SiCNT) bundles are investigated. Full structural optimizations show that the cross sections of these large-diameter SiCNTs in the bundles have a nearly hexagonal shape. The ...
PubMed
The synthesis of a unique isotope engineered system, double-wall carbon nanotubes with natural carbon outer and highly 13C enriched inner walls, is reported from isotope enriched fullerenes encapsulated in single-wall carbon nanotubes (SWCNTs). The material allows the observation of the D line of the highly defect-free inner tubes that can be related to a curvature induced ...
... Title : Theory of Cusptron Microwave Tubes,. ... Descriptors : *MICROWAVE EQUIPMENT, *MICROWAVE TUBES, ELECTRON BEAMS. ...
... CATHODES(ELECTRON TUBES), *ELECTRODES, *ICONOSCOPES, *IMAGE TUBES, *STORAGE TUBES, ALUMINUM COMPOUNDS ...
... Descriptors : , RESOLUTION, STORAGE TUBES, ELECTRON TUBE COMPONENTS, BRIGHTNESS, CATHODE RAY TUBE SCREENS ...
... Title : MICROWAVE TUBE RESEARCH. ... Descriptors : *ELECTRON TUBES, *KLYSTRONS, *MICROWAVE EQUIPMENT, *TRAVELING ...
Single-wall nanotubes can adhere to planar surfaces via van der Waals forces, and this causes the tubes to deform. We use classical molecular dynamics to estimate this deformation and density functional theory to quantify its impact on electronic band structure. For (n,0) tubes, adhesion causes the maximum bandgap to rise more rapidly ...
... Descriptors : *CATHODE RAY TUBE SCREENS, *STORAGE TUBES, FIBER OPTICS, ELECTRONIC SCANNERS, CAMERA TUBES ...
... AERIAL RECONNAISSANCE, IMAGE MOTION ... TUBES, CAMERA TUBES, TELEVISION ... RESOLUTION, ELECTRON TUBE COMPONENTS ...
Nanotubes with H2Ti3O7 stoichiometry have been studied by ab initio methods in the diameter range of ~20-60 �. The distribution of the protons on the unit cell surface and its effect on the structure and electronic properties of the titanium dioxide backbone has been investigated. The preferred protonation pattern was found to be the function of the ...
Ab initio calculations show that (5,5) and (6,6) single-walled gallium nitride nanotubes (GaN NTs) in bundles could aggregate spontaneously to form new condensed phases when bundled tubes are close enough under hydrostatic pressure. The new GaN phases have typical porous structures, constructed by alternating tetragons and hexagons around the original ...
... Descriptors : *STORAGE TUBES, ELECTRON BEAMS, ELECTRON OPTICS, ELECTRON TUBE TARGETS, ELECTRONIC SCANNERS, SIGNALS ...
be explained by differences in the contact potential of these very narrow diameter tubes due to their strong 2010 125444-5 #12;40 Since we performed our measurements on a buckypaper the ac- tual contact potential-dependent experiments on buckypaper of SWCNTs with mixed metallicity we observed that the actual contact potential
... drift tube. The drift tube ... path of the electrons will constantly increase in radius as the electron drifts across the tube* This changs in radius can be ...
... scanned camera tube with electronically ... ELECTRON BEAMS, IMAGES, PHOTOCATHODES, PULSES ... ANODES(ELECTRON TUBES), TELEVISION ...
The present work constitutes a study of the response of magnesium oxide nanotubes on the bend deformation. Our molecular-dynamics simulations show that the structure of the MgO tubes being face centered cubic at ambient conditions is transformed under mechanically induced buckling stress to hexagonal near the tube bend. This transformation occurs through a ...
... make the ultrasonically welded tube mount ... ELECTRON TUBES, ULTRASONIC RADIATION, WELDING, WELDING, ELECTRON TUBE ...
... The first experimental tube incorporating this feature produced ... ELECTRON GUNS, *ELECTRON TUBES, *MICROWAVE EQUIPMENT, ANODES ...
... Descriptors : *STORAGE TUBES, COLORS, ELECTRON GUNS, ELECTRON TUBES, FLUORESCENCE, LUMINESCENCE, PHOSPHORESCENT ...
... Descriptors : *CATHODE RAY TUBES, *ELECTRON OPTICS, CATHODE RAY TUBE SCREENS, DEFLECTION, DISPLAY SYSTEMS, ELECTRON ...
... Descriptors : (*CATHODE RAY TUBES, MEMORY DEVICES), ELECTRON BEAMS, ELECTRON TUBE TARGETS, PATENTS, USSR. ...
... Descriptors : *STORAGE TUBES, MANUFACTURING, RELIABILITY( ELECTRONICS), ELECTRON TUBE COMPONENTS. ...
... Descriptors : *STORAGE TUBES, ELECTRON TUBE COMPONENTS, MANUFACTURING, RELIABILITY(ELECTRONICS). ...
... (Author). Descriptors : *STORAGE TUBES, ELECTRON TUBE COMPONENTS, RELIABILITY(ELECTRONICS), MANUFACTURING. ...
... Descriptors : (*PHOTOELECTRIC EFFECT, ELECTRON TUBES), (*ELECTRON TUBES, PHOTOELECTRIC EFFECT), THERMIONIC EMISSION ...
... Descriptors : (*SECONDARY EMISSION, ELECTRON TUBES), (*THERMIONIC EMISSION, ELECTRON TUBES), FILMS, PHOTOELECTRIC ...
of RKIP on the ERK signalling pathway using the stochastic process algebra PEPA. In A. Ingolfsdottir and H
... Title : Chalcopyrite Magnetic Semiconductors: An Ab-Initio Study of Their Structural, Electronic and Magnetic Properties. ...
... Descriptors : *Camera tubes, *Storage tubes, Electron guns, Arrays, Semiconductor devices, Silicon, Electron tube targets, Television cameras ...
... cathode-ray tube under investigation. (Author). Descriptors : *ELECTRON TUBE COMPONENTS, *CATHODES(ELECTRON TUBES), CATHODES( ...
... Accession Number : ADD128602. Title : Electron-Beam Welding Tubes to Titanium Tube Plates,. Corporate Author : Personal ...
... Title : ELECTRONIC TUBE TECHNOLOGY-MICROWAVE TUBES. Corporate Author : OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS. ...
ABS>The method described for measurement of photoelectron detection efficiencies requires that a weak light source illuminate the photocathode of the first stage of the image intensifier system, and that the resulting electron current be measured. The light is then reduced by a known large factor so that the number of ...
Single-walled carbon nanotubes exhibit remarkable electronic properties. It is well known that there are two types of single-walled carbon nanotubes: metallic and semiconducting. However, separating semiconducting carbon nanotubes from metallic ones is a ``holy grail'' problem in nanoelectronics fields. Using ab initio density functional theory, we will ...
... Thus for a the absorbency at 330 m# of a 0..5-1% solution of conjugate single preparation of labeled rabbit antibody (TG-Ab-lI) Ps ... tube. ...
failure mode. Figure. 1 presents a summary of the failure criticalities ..... the boiler. The main components of the. ABS are the shell and tube ...
... Descriptors : *ELECTRON TUBE TARGETS, *STORAGE TUBES, USSR, VOLTAGE, ELECTRON BEAMS, ELECTRODES, TRANSLATIONS ...
... Descriptors : *ELECTRONIC SWITCHES, *MANOMETERS, *RADAR DUPLEXERS, *TRANSMIT RECEIVE TUBES, BROADBAND, ELECTRON ...
... Descriptors : *STORAGE TUBES, ELECTRODES, MEASURING INSTRUMENTS, ELECTRON TUBES, ELECTRON GUNS, PHOTOCATHODES ...
... IMAGE CONVERTERS, *IMAGE INTENSIFIERS(ELECTRONICS), STORAGE TUBES, ELECTRON TUBE COMPONENTS, MODULATION, LOW ...
... Descriptors : *CATHODE RAY TUBES, *DATA PROCESSING, CATHODE RAY TUBE SCREENS, COMPUTERS, DISPLAY SYSTEMS, ELECTRON ...
... uncooled Thermicon tubes were also ... THERMICONS, INFRARED IMAGES), (*TELEVISION CAMERAS ... COOLING, ELECTRON TUBE TARGETS ...
... FW-202 barrier-grid storage tube. ... Descriptors : *ELECTRON TUBES, *MANUFACTURING, *STORAGE TUBES, ENGINEERING ...
... Descriptors : (*CATHODE RAY TUBES, RELIABILITY(ELECTRONICS)), (*RADAR EQUIPMENT, PORTABLE EQUIPMENT), CATHODE RAY TUBE ...
... was assembled, evacuated, and pressure ... CATHODE RAY TUBES, RELIABILITY(ELECTRONICS ... CATHODE RAY TUBE SCREENS, MINIATURE ...
... The tube employs coaxial and beaded stand-off construction. ... Descriptors : *IMAGE TUBES, *MINIATURE ELECTRON TUBES, MANUFACTURING. ...
... Descriptors : *CATHODE RAY TUBES, ANALOG COMPUTERS, CATHODE RAY TUBE SCREENS, CATHODES(ELECTRON TUBES ...
... (Modified author abstract). Descriptors : *STORAGE TUBES, ELECTRON TUBE COMPONENTS, MANUFACTURING. Subject ...
... device. (Author). Descriptors : *STORAGE TUBES, ELECTRON TUBE COMPONENTS, MANUFACTURING. Subject Categories ...
... corrected. (Author). Descriptors : *STORAGE TUBES, ELECTRON TUBE COMPONENTS, MANUFACTURING. Subject Categories ...
... (Author). Descriptors : *IMAGE TUBES, PERFORMANCE(ENGINEERING), ELECTRON TUBE COMPONENTS, IMAGES, SCATTERING. ...
... TUBES), CATHODES(ELECTRON TUBES)), OXIDES, COATINGS, SPACE ... FREQUENCY, BARIUM, IRON COMPOUNDS, NICKEL, PLATINUM. ...
... Descriptors : (*CATHODE RAY TUBES, *FIBER OPTICS), MANUFACTURING, MILITARY REQUIREMENTS, SPECIFICATIONS, ELECTRON TUBES ...
This article reviews the electronic and transport properties of carbon nanotubes. The focus is mainly theoretical, but when appropriate the relation with experimental results is mentioned. While simple band-folding arguments will be invoked to rationalize how the metallic or semiconducting character of nanotubes is inferred from their topological structure, more sophisticated ...
Temperature and size considerations of the tube fin space radiator were characterized by charts and equations. An approach of accurately assessing rejection capability commensurate with a phase A/B level output is reviewed. A computer program, based on Ma...
National Technical Information Service (NTIS)
ABS>The application of polished vitreous silica tubes as liners for fuel element channels is described. Sections of these tubes are joined with rings of sintered Al; dimensional changes are compensated by spring systems. Various constructions are given. (NPO)
For the fully developed turbulent flow of a compressible fluid, the equation of motion is given. After a theoretical mathematical development, two nomographs are constructed for calculation of the pressure drop in uniformly heated tubes at pressure p = 23...
Recently, Lagos et al. (Nature Nanotechnology 4, 149 (2009)) reported the discovery of the smallest possible silver square cross-section nanotube. A natural question is whether similar carbon nanotubes can exist. In this work we report ab initio results for the structural, stability and electronic properties for such hypothetical structures. Our results ...
Chrysotile single-layered nanotubes, obtained by wrapping the Mg3Si2O5(OH)4 lizardite monolayer along the (n,-n) hexagonal lattice vector, are simulated at the ab initio level by using an all electron 6-31G* basis set and the B3LYP functional for n varying from 14 to 24 (the nanotube radius R referred to the oxygen connecting the Mg and Si layers increases ...
We present results from a quantum and semiclassical theoretical study of the \\rho_{xy} and \\rho_{xx} resistivities of a high mobility 2-D electron gas in the presence of a dilute random distribution of tubes with magnetic flux \\Phi and radius R, for arbitrary values of k_f R and F=e\\Phi/h. We report on novel Aharonov-Bohm type oscillations in ...
... ELMIRA NY ELECTRONIC TUBE DIV. ... Descriptors : (*CAMERA TUBES, *COMBAT ... OPTICAL SCANNING), IMAGE TUBES, OPTICAL TRACKING ...
... Descriptors : *Display systems, *Cathode ray tubes, Storage tubes, Dielectric films, Image tubes, Electron guns, Membranes, Elastomers, Optical ...
... Title : The Invention of Traveling Wave Tubes,. ... REPRINTS, ELECTRON BEAMS, MATHEMATICAL ANALYSIS, HISTORY, INVENTIONS. ...
... and the testing of tubes either by replacement or by using a tube tester. ... vide& into the replacement of defective parts and the making of circuit or ...
... (Author). Descriptors : , RESOLUTION, STORAGE TUBES, ELECTRODES, BRIGHTNESS, CATHODE RAY TUBE SCREENS, ELECTRON BEAMS ...
... (Author). Descriptors : (*STORAGE TUBES, RESOLUTION), DISPLAY SYSTEMS, CATHODE RAY TUBES, ELECTRON BEAMS, ELECTRODES ...
... (Author). Descriptors : , TELEVISION EQUIPMENT, VIDICONS, ELECTRON TUBE COMPONENTS, CATHODE RAY TUBES. ...
... Descriptors : *STORAGE TUBES, PRODUCTION, MANUFACTURING, QUALITY CONTROL, PRODUCTION CONTROL, ELECTRON TUBE ...
... 600 HAS BEEN THE PREDOMINANT MATERIAL SELECTED FOR STEAM GENERATOR TUBING IN ... SIDES OF THE TUBE WALL. ...
... Pertinent tube characteristics are plotted on ... Descriptors : *GRAPHICS, MICROWAVE EQUIPMENT ... ELECTRON TUBES, MICROWAVE EQUIPMENT ...
The sensing ability of metallic carbon nanotubes toward various gas species ( NO2 , NH3 , CO, H2O , and CO2 ) is investigated via ab initio calculations and Nonequilibrium Green�s Functions technique, focusing on the salient features of the interaction between molecules and oxygenated-defective tubes. As the adsorption/desorption of molecules induces ...
The reference text is broken down into these main topics: * Introduction * Early tube history * The triode * The tetrode * Beam power tubes * The pentode * Combination tubes * Tube parameters * Ionization (gas-filled) tubes * Display tubes * Microwave ...
NSDL National Science Digital Library
The specificity of solid-phase radioimmunoassay method for Australian antigen (Au-ag) and anti-Australian antigen (Au-ab) was confirmed. Au-ab was coated quantitatively on the surface of /sup 125/I labeled Au-ag. The /sup 125/I- labeled Au-ag showed positive reaction by using a tube coated with Au-ab, but ...
... Descriptors : *DIODES(ELECTRON TUBES), *SEMICONDUCTOR DIODES, RADIATION EFFECTS, ELECTRON BEAMS, ELECTRON TUBE ...
The basic AB {ital problem} is to determine how an unshielded tube of magnetic flux {Phi} affects arbitrarily long-wavelength charged particles impinging on it. For spin 1 at almost all {Phi} the particles do not penetrate the tube, so the interaction essentially is periodic in {Phi} (AB {ital effect}). ...
The objectives of the program are to: (1) evaluate the feasibility of production electron beam welding and machining of typical electron tube materials; (2) apply electron beam processing to fabrication of two specific electron tube types; test these ...
... with alloying supplements of rhenium. Descriptors : (*CATHODES(ELECTRON TUBES), *RHENIUM ALLOYS), ELECTRON TUBE HEATERS, ...
... COLD CATHODE TUBES, *GLOW DISCHARGES, INTENSITY, ELECTRIC FIELDS, ELECTRONS, CATHODES(ELECTRON TUBES), SOURCES ...
... Abstract : The INTIC tube is an electronic ... IMAGE INTENSIFIERS(ELECTRONICS) ), (*STORAGE TUBES, *IMAGE INTENSIFIERS(ELECTRONICS ...
... Accession Number : ADA440631. Title : Ab Initio Quantum Chemical Study of Electron Transfer in Carboranes. Descriptive Note : Journal article. ...
... Title : AB Initio Study of the Electronic Magnetic Circular Dichroism ... functions are determined using as initio quantum chemical techniques including ...
The methods for operating storage tubes are summarized. Fundamental working principles are discussed and illustrated. Brief descriptions are provided for the following types of tubes: (1) image scanning tubes; (2) blue lighting storage tubes; (3) charge storage tubes; and (4) image storage ...
... Descriptors : *STORAGE TUBES, RELIABILITY(ELECTRONICS), ELECTRON TUBE TARGETS, DEGRADATION, SIGNAL TO NOISE RATIO, TEST ...
... Descriptors : *STORAGE TUBES, RELIABILITY(ELECTRONICS), ELECTRON TUBE TARGETS, MANUFACTURING, SIGNAL TO NOISE RATIO ...
... Descriptors : (*STORAGE TUBES, MANUFACTURING), ELECTRON TUBE TARGETS, RELIABILITY(ELECTRONICS), TEST METHODS, GAIN ...
... nature, on a trans- verse-wave high-power amplifier tube in accordance with US Army Electronics Command, Electron Tubes Division Technical ...
... nature, on a transverse-wave high-power amplifier tube in accordance with US Army Electronics Command, Electron Tubes Division Technical ...
... of' the IIT tube and does so ... Descriptors : *IMAGE INTENSIFIERS(ELECTRONICS) , *PATENTS ... CONSUMPTION, CATHODES(ELECTRON TUBES). ...
... Author : ITT ELECTRON TUBE DIV ROANOKE ... causes of reject tubes are still ... Descriptors : *STORAGE TUBES, PRODUCTION, ELECTRON BEAMS ...
Explains the principles of electron flow across a gap, basic features of the diode tube, control of electron flow in the tube, photo electric cells, x-ray tubes, and the diode as a rectifier.
... Descriptors : *CATHODE RAY TUBES, CATHODE RAY TUBE SCREENS, COATINGS, ELECTRON GUNS, ELECTRON TUBES, LUMINESCENCE ...
Measuring techniques for characterizing electronic streak tubes including dynamic range and resolution are described. A particular tube with a CCD imaging device within the envelop is described.
ABS>A shield plug is designed ior an access tube of a gascooled reactor. The plug has locking means for sealing the plug to the access tube and means for connection to a remote indicating position for providing information on the positions of parts of the locking means. A procedure is given for removing the plug from its ...
ABS> The results of a study to determine reliable heat transfer data for the design of a suitable heat exchanger forthe Intermediate Scale Homogeneous Reactor are presented. Design studies of a vertical submerged-tube evaporator with nucleate boiling from the outer tube surfaces and of a vertical tube, ...
