A derivation is given of the transport mean free path and the diffusion length In a homogeneous medium. The derlvation is more concise than the random walk method and gives additional physical insight into the concepts of the random walk mechanism. The diffusion length is exact for all absorption ratios and ...
Energy Citations Database
A wide variety of postulates have been put forward concerning the chemical composition and formation mechanisms of interstellar grains, their physical properties, and their connection with the diffuse absorption bands and the interstellar reddening. Part ...
National Technical Information Service (NTIS)
A physical background is presented for a computer program which calculates the thermal neutron diffusion parameters for homogeneous mixtures of any compounds. The macroscopic absorption, scattering and transport cross section of the mixture are defined wh...
in detail later: (i) diffusion of the sample solution into the membrane and (ii) dissolution of the membrane due to the presence of the analyte in the sample. Before diffusion/dissolution, the membrane introduction of the sample, the sample diffuses into the membrane and causes a change in the absorption
E-print Network
Description of the design and testing of a residential solar cooling system consisting of a solar energy collector and heat conversion assembly, an absorption-diffusion cooling assembly for daytime use, and an absorption-type cooling unit for night use. Tables list temperatures and pressures of the ammonia-water working fluid at various modes of the system ...
NASA Astrophysics Data System (ADS)
An analytical electron microscope study of the electrolytic hydrogenation of FeTi is reported. Direct evidence of the physical separation of the oxidized surface layer is shown. This shows that the H reaches the FeTi alloy without diffusing through the oxide layer. (FS)
A search for absorption from neutral rubidium at 7800 A was conducted. No evidence for absorption to
NASA Technical Reports Server (NTRS)
The moisture absorption of ARALL is compared to that of aramid and carbon fiber composites. The influence of diffusion barriers on the diffusion process is examined. The absorption rate of ARALL strongly depends on the environmental temperature while the ...
Six processes have been evaluated as regards irreversibility generation for hydrogen separation from binary gas mixtures. The results are presented as a series of plots of separation efficiency against the mol fraction hydrogen in the feed gas. Three processes, condensation, physical absorption and electrochemical separation indicate increasing efficiency ...
DOE Information Bridge
The authors present the photo-biomolecular effects of laser rays by introducing their physical principles. The interaction between irradiated energy and matter is taken into consideration, by studying the wave length of the different types of laser, the emission and the energetic absorption. It is pointed out that the low-intensity laser radiations with ...
PubMed
A new chemical probe determines the properties of an analyte using the light absorption of the products of a reagent/analyte reaction. The probe places a small reaction volume in contact with a large analyte volume. Analyte diffuses into the reaction volume. Reagent is selectively supplied to the reaction volume. The light absorption ...
For the characterization of CO(2) absorption in aerated microalgal culture systems, a different approach based on K(L)a(O(2)) determination and transformation was studied. To confirm the validity of this method, the influence of reactions between CO(2) and compounds (OH(-), H(2)O, and NH(3)) present in the culture medium upon the absorption mechanism was ...
In a numerical study, we investigate a diffuse-photon computed tomography of a turbid medium. Using a perturbation approach, we relate through a matrix K a bulk heterogeneous distribution of the optical absorption coefficient {mu}{sub a} that characterizes the heterogeneity in an otherwise homogeneous turbid medium to the diffuse ...
Problems of anomalous infiltration in porous media are considered. As follows from the analysis of experimental data, modification of the infiltration equation is necessary. A fractional diffusion equation with variable order of the time-derivative operator for describing the liquid infiltration in porous media is proposed. The physical meaning of this ...
... Title : Finite Extinction Time for Non-Linear Absorption-Diffusion Equations. Descriptive Note : Master's thesis Jun 2001-Sep 2002. ...
DTIC Science & Technology
... it is possible to derive quantitative information about cloud absorption ... Within this region, known as the diffusion domain, the diffuse radiation ...
NASA Website
A moving boundary problem involving a parabolic differential equation with a nonlinear absorption function f and with a constant coefficient of diffusion is analyzed.
... Title : Stereselective Absorption of Permethrin Through Silastic Membrane and Excised Porcine Skin In Vitro Flow Through Diffusion System. ...
... ionized air vs. photon energy. The absorption edge is at the energy of the K absorption edge of nitrogen. effective mass ...
... Title : Spectra of Diffuse Reflection as an Information Source About the Absorption Spectra of Adsorbed Molecules (Spektry Diffunzogo Otrazheniya ...
... Abstract : Diffusion and equilibrium absorption of polyisoprene liquids into crosslinked samples of cis-polyisoprene (natural rubber) have been ...
... ADA119086. Title : A Moving Boundary Problem Modelling Diffusion with Nonlinear Absorption. Descriptive Note : Doctoral thesis,. ...
... Title : A DIFFUSION CHAMBER STUDY OF VERY SLOW MESONS. IV. ABSORPTION OF PIONS IN LIGHT NUCLEI. Corporate ...
The aim of this work is to study the feasibility of using a low-cost biomass absorbent steam-exploded corn stalk (SECS) to absorb ethanol in its production by fermentation. Measurement of many the physical properties of SECS showed its specific surface area was about 214 m(2)/g and it had a good structure for absorption. Some influencing parameters of ...
... Descriptors : *IONS, *PLASMAS(PHYSICS), *LASERS, *ACOUSTIC ABSORPTION, *RESONANCE ABSORPTION, MAGNETIC PROPERTIES ...
... IN A PLASMA WHOSE ELECTRON DENSITY VARIES LINEARLY ... PLASMAS(PHYSICS), ABSORPTION, ELECTRONS, PARTIAL DIFFERENTIAL ...
The imaging properties of the phosphor layer in fluorescent screens or image intensifiers are related to its x-ray absorption characteristics. In this study, we applied Monte Carlo methods for the simulation of x-ray photon diffusion in a phosphor layer. The K-reabsorption factor, absorbed x-ray energy, quantum absorption efficiency, ...
The optical absorption lines of quasars are examined, and implications of the lines for the physical
... SURFACES, POLYPROPYLENE, DIFFUSION, DOPING, SORPTION, SURFACE TENSION, POLYETHYLENE, POLYPHENYLENES, THIAZOLES. ...
It is shown that the minority carrier diffusion contribution to the ac quantum efficiency of a semiconductor photodiode is a function of the product of the absorption coefficient (alpha) and the diffusion length (L) of the semiconductor material. Since L ...
... Title : Direct Measurements of the Physical Diffusion of Redox Active Species: Microelectrochemical Experiments and their Simulation. ...
A theoretical study of rotational profiles of molecular absorption bands is essential for direct comparison with observations of diffuse interstellar bands. Applications using a Gaussian quantum-chemical approach within density functional theory are presented. Structural and vibrational properties of the polycyclic aromatic hydrocarbon ovalene cation ...
A theoretical study of rotational profiles of molecular absorption bands is essential for direct comparison with observations of diffuse interstellar bands. Applications using gaussian quantum-chemical approach within DFT are presented. Structural and vibrational properties of the polycyclic aromatic hydrocarbon ovalene cation (C32H14+) are obtained. We ...
The diffuse (non self-gravitating) interstellar medium of the Galaxy is almost impossibly complex and diverse. Temperatures and densities range over many orders of magnitude. The magnetic field links all regimes of the gas, including cosmic rays. Shocks from supernovae and other sources buffet the medium. Into this maelstrom, theorists have ventured. Some models emphasize ...
Transient methods, such as those with pulse- or stepwise heating, have often been used to measure thermal diffusivity of various materials including layered composite materials. The aim of the present study is to investigate effects of various parameters on the measurement of thermal diffusivity when the transient methods are applied. Mainly a two-layered ...
Microstructure is observed on many lines of sight in the diffuse interstellar medium, mainly through variations in atomic line absorptions on timescales of a decade or less. This timescale implies that microstructure exists on a size scale comparable with that of the solar system; it is overpressured and transient. Both observations and theory confirm that ...
... Test procedures are described for determining experimentally the values of the moisture content and the diffusivity of composite materials. ...
... THERMODYNAMICS INFORMATION PROCESSING WELDING AND METALS ... accompanying the diffusion of water into ... surfaces in contact with the ...
... Descriptors : *Spectrophotometers, *Optical instruments, Absorption, Electrochemistry, Performance tests, Tin compounds, Diffusion, Potential ...
Several properties important for the absorption of carbon dioxide and nitrous oxide in solutions of diethanolamine (DEA) or di-2-propanolamine (DIPA) and polyethylene glycol (PEG 400, average molecular weight 400) were determined experimentally. These properties include the density and viscosity of the amine-PEG 400 solutions, the physical solubility and ...
A method for the determination of small self-diffusion coefficients is given. For the determination of the diffusion coefficient, no preliminary determination of the absorption coefficient of beta-rays is required. In general, the absorption function does...
Moisture diffusivity values of different rice kernel components namely, endosperm, bran and husks are required to solve mathematical models describing absorption and desorption processes. In addition to the rice variety and temperature, the moisture diffusivity also depends on its instantaneous mois...
Technology Transfer Automated Retrieval System (TEKTRAN)
Photoacoustic tomography (PAT) refers to imaging that is based on the photoacoustic effect. Although the photoacoustic effect as a physical phenomenon was first reported on by Alexander Graham Bell in 1880 [1], PAT as an imaging technology was developed only after the advent of ultrasonic transducers, computers, and lasers [2�31]. A review on biomedical photoacoustics is ...
This study quantifies the influence of atmospheric clouds on propagation of sound and infrasound, based on an existing model [Gubaidulin and Nigmatulin, Int. J. Multiphase Flow 26, 207-228 (2000)]. Clouds are considered as a dilute and polydisperse suspension of liquid water droplets within a mixture of dry air and water vapor, both considered as perfect gases. The model is limited to low and ...
New observations of the gallium abundance in main-sequence peculiar stars are now available in the literature. The present paper analyses these new data in the framework of the diffusion processes. The radiative accelerations of gallium are computed, with up-to-date gallium line data, in various physical conditions of stable main-sequence star atmospheres. ...
In situ absorption studies with dinoprostone in the rat jejunum were carried out to provide a quantitative mechanistic insight of the absorption process. The variables included buffer pH (3.5-9.5), buffer capacity, hydro-dynamics in the lumen, and concentration. The disappearance kinetics from the lumen was first order. The rate decreased with increasing ...
Continued development of a method for measurement of diffusion coefficients of gases for wide ranges of temperature and pressure is described. A shocktube provides experimental conditions, and diffusivity of the gas is inferred from the rate of absorption...
The authors study the mechanism of hydrogen absorption by steel during the electrodeposition of zinc from alkaline zincate electrolytes containing a brightener. They find that the rate of absorption of hydrogen by the steel is governed by the concentration of diffusion-mobile hydrogen absorbed by a thin effective layer of zinc coating ...
... AND ABSORPTION OF SOLAR RADIATION IN THE CLOUDLESS ATMOSPHERE-ATMOSPHERIC AND OCEANIC PHYSICS, V5, NO12, P752 ...
... Title : REFLECTION AND ABSORPTION OF SOLAR RADIANT ENERGY BY CLOUD LAYERS-ATMOSPHERIC AND OCEANIC PHYSICS, V8, NO5 ...
... chlorophyll and non-algal particles (NAP), and it provides outputs such as phytoplankton absorption coefficient, detritus absorption coefficient ...
... Title : LASER LIGHT ABSORPTION MEASUREMENTS IN AN INTERACTION- PRODUCED PLASMA COLUMN, IN: APPLIED PHYSICS LETTERS ...
In this paper, we revisit gamma-ray-emitting region for 10 GeV-1 TeV gamma rays from 3C 279 through studying the photon-photon absorption optical depth due to the diffuse radiation of the broad-line region (BLR) and the extragalactic background light (EBL). Based on the power-law spectrum detected by MAGIC, the preabsorbed spectra are inferred by ...
An absorption feature at 3.4 ?m has been detected in the long-wavelength wing of the 3.1 ?m H2O ice feature in three young stellar objects: IRAS 18511+0146, IRAS 21413+5442, and IRAS 04579+4703. The profile of the 3.4 ?m absorption in IRAS 18511+0146 has distinct subfeatures at 3.38, 3.41, and 3.48 ?m and is not similar to those found in molecular clouds ...
... I plotted (in decibels) as points at the left of the first hydrophone arrow in ... Figure 44 shows high absorption at the same time as a sharp increase in ...
... of two-step absorption in which the first step can be described by capillary rise and the second step by diffusion of oil from the capillaries into the ...
The optical absorption by free carriers in a semiconductor containing a dispersed colloidal phase is treated, taking into account the dipolar diffusion of minority carriers about the particles. (auth)
... Accession Number : ADA209347. Title : Modelling the In Situ Infrared Reflection-Absorption Spectra of the Diffuse Layer. ...
Optical properties of interest are molecular and aerosol scattering, aerosol absorption, water vapor absorption and the ratio of diffuse to global horizontal photon flux...
National Renewable Energy Laboratory (NREL)
... We used excised rat skin in static diffusion cells to investigate the dermal absorption of these components from the MACS in powdered form. ...
... We used excised rat skin in static diffusion cells to investigate dermal absorption of Ml propellant in powdered form. No ...
... For the AS4/Ultem bars, anisotropic diffusion constants were measured, and diffusion occurs in the fiber direction three times faster than transverse ...
... AD0623859. Title : ON THE EXTINCTION OF OPPOSED-JET DIFFUSION FLAMES: A PHYSICAL CRITERION FOR EXTINCTION,. ...
... Title : MOISTURE DIFFUSION AND SOLID-STATE NMR INVESTIGATIONS ON THE PHYSICAL AGING PROCESSES IN NETWORK EPOXY ...
... REPRINTS, THEORY, PARTICLES, INTERNAL ... MOLECULE INTERACTIONS, DIFFUSION, ACTIVATION ... & ELEMENTARY PARTICLE PHYSICS. ...
... diffuser and from a cascade of two ... one measures the angular distribution of the ... Keywords: Laser speckle, Cascaded diffusers, Remote sensing ...
... Since their "diffublon constants" are not the st&.ndard diffusion coefficients enc!.,tntered in physical metallurgy, their technique and results will be ...
... AND SPACE CO INC PALO ALTO ... diffusion and mechanical computational analysis methodology ... of nonlinear and coupled physical processes in ...
... Diffuse Reverberation in the Littoral Environment ... reverberation. Diffuse bottom reverberation, at present, is the better understood of the two. ...
Particle diffusion in a curved tube embedded in $R_3$ is considered. We find the diffusion coefficient depends on tube's curvature. Diffusion coefficient is obtained in $\\epsilon$ (radius of tube) expansion. Physical interpretation of curvature dependent diffusion coefficient is given.
We prepared quasicrystal samples by rapidly quenching of Ti50-xZr30+xNi20 alloys (where 0<=x<=10), and measured equilibrium vapor pressures of hydrogen using a lab-built computer-controlled-absorption apparatus at elevated temperatures. To activate the hydrogen absorption, we removed a thin oxygen layer on the surface of the sample by using a plasma ...
Owing to its novel physical properties, as well as its technological implication in many fields, the thermal and optical properties of WO3 thin films are studied here. These thin films are prepared from Ammonium Tungstate and deposited on a glass substrate at 400�C by the Spray Pyrolysis Technique. The thermal properties (Thermal conductivity and thermal ...
Calculations of tensile strength and tensile modulus were carried out to investigate the effects of hydrogen interactions, diffusion and segregations in palladium single crystal, high-vacancy crystal and bicrystal, by using the embedded atom method. Elevated temperature, hydrogen absorption and defects such as vacancy and grain boundary (GB) individually ...
Data are presented for a one-minute dip in electron intensity that was observed coherently by four different detectors at 1546:51 ERT on DOY 244/1979 as Pioneer 11 crossed the orbit of Mimas inbound during its encounter with the Saturn system. By a detailed analysis, we show that this absorption microsignature in electron intensity is plausibly attributable to the particle ...
... Descriptors : *Semiconductors, *Electron transport, Diffusion, Solid state physics, Thermal diffusion, Monte Carlo method, Charge carriers, Reprints. ...
Measurements of outgassing have been made from Martin black and a variety of diffuse absorptive baffle materials under development for radiation resistant stray light management. Outgassing measurements were made during pumpdown from atmosphere at room te...
This is an abstract concerning: Stereselective Absorption of Permethrin Through Silastic Membrane and Excised Porcine Skin In Vitro Flow Through Diffusion System.
The diffusion of radioactive iron in iron and iron-3% Si alloys in the temperature range 700 to 890C is reported. An apparatus and technique is described and is based on absorption of the emitted Beta-radiation. Relative contributions of the grain boundar...
Page 1. FINITE EXTINCTION TIME FOR NON-LINEAR ABSORPTION- DIFFUSION EQUATIONS THESIS Jacob B. Goldberg AFIT/GAM/ENC/02S- ...
The diffusion-absorption heat pump offers advantages including no moving parts, noise and vibration free operation and operation without electric power. An example of such a cycle is the gas-fired domestic refrigerator. The cycle is similar to an absorpti...
The objective of this research effort was to investigate the physical and mechanical properties of composites processed from wood fiber and automobile polymer fluff. To this end, a study was conducted to investigate the feasibility of incorporating polymer fluff in dry-process wood fiberboard using polymeric diphenylmethane diisocyanate and phenol - formaldehyde resins. The ...
The book comprises two parts. The first consists of seven review articles on coal chemistry, including NMR, tandem mass spectrometry, physics, liquefaction, catalytic reactions, devolatilization and combustion. The second part contains 12 original articles covering characterization and chemistry coal structure and depolymerization, analytical methods including gas ...
... less than gas phase values indicating considerable diffusion during deposition. ... Descriptors : (*TRANSITION METALS, *ULTRAVIOLET ...
... was used to interpret the ultrasonic absorption data for manganese sulfate in ... higher than those for the elementary diffusion process for the ions. ...
... Pagination or Media Count : 13. Abstract : A formula is derived and compared with a formula due to Fourier based on Fick's second diffusion law. ...
Diffusion pump oil reflectance and absorption coefficients measured in three thicknesses using light
filtration module and the reverse osmosis module were supplied by the Nitto ... of absorption type thermopervaporation corresponding to a diffusion gap ...
... MATHEMATICAL MODELS, THERMAL DIFFUSION, LASERS, THERMAL CONDUCTIVITY, ABSORPTION, SKIN(ANATOMY), TEMPERATURE ...
... absorption properties. The durability aspects covered were freeze-thaw, carbonation, chloride diffusion and abrasion. The ...
... absorption. It was found that the creep deformation was highly affected by the solubility controlled gas, carbon dioxide. ...
... Results of some leaching studies, as they pertain to the condensed state diffusion-controlled, fission product absorption model, are presented. ...
... electrode surface by an oxide laxcr in as much as the ... would exceed the diffusion current associated with the transport of absorbed deuterium 6 ...
during noninvasive diffuse optical spectroscopy monitoring of hypovolemic shock and fluid replacement," J
The spectrum of the diffuse component of the sky background in the near infrared is quite complex and comprises multiple components. ...
... absorption is controlled by fission product surface concentrations as given by Henry's law constants and diffusion of these fission products into the ...
A model is developed for the absorption of infrasound by atmospheric clouds made of a suspension of liquid water droplets within a gaseous mixture of water vapor and air. The model is based on the work of D.A. Gubaidullin and R.I. Nigmatulin [Int. J. Multiphase Flow, 26, 207-228, 2000], which is applied to atmospheric clouds. Three physical mechanisms are ...
1453 �TUDE COMPARATIVE DES VIBRATIONS DE BASSES FR�QUENCES DE LA 03B2-HYDROQUINONE PAR INFRAROUGE 1976, accept� le 23 aofit 1976Jj R�sum�. 2014 La diffusion des neutrons lents par l'hydroquinone 03B2, Classification Physics Abstracts 7.340 - 8.822 1. Introduction. - Le spectre d'absorption infra- rouge de l'hydroquinone
Available test data are summarized, test methods are evaluated and values are recommended for thermal properties of masonry to be used in passive solar design. Values of specific heat, conductivity, and diffusivity are given for concrete and clay brick. Variations of these values with other physical properties such as density, moisture content, and ...
This report summarizes available test data, evaluates test methods, and recommends values for thermal properties of masonry to be used in passive-solar design. Values of specific heat, conductivity, and diffusivity are given for concrete and clay brick. Variations of these values with other physical properties such as density, moisture content, and ...
Papers are presented on such topics as duration fluctuations of a radar sounding pulse and the mean power of an echo signal from meteorological objects; the propagation of laser-radiation-absorption waves during optical breakdown; a vortex-ring generator; the ascent of a vortex wing in a turbulent atmosphere; and the effect of diffusion on the evolution of ...
Moisture damage in asphalt mixtures is a complex phenomenon that involves mechanical, chemical, physical and thermodynamic processes. This damage contributes significantly to the premature deterioration of asphalt pavements, which leads to extra cost in highway maintenance and vehicle operations. One key mechanism of how moisture reaches the asphalt-aggregate interface is by ...
Nonlinear Diffusion. Porous Medium and Fast Diffusion. From Analysis to Physics and Geometry Juan Swansea, July 2008 Juan L. V�azquez - Nonlinear Diffusion. Porous Medium and Fast Diffusion Equations � p. 1/?? #12;Introduction Main topic after 1981: Nonlinear Diffusion ...
In this article, we report on the characterization of a photovoltaic detector based on an n-type GaN Schottky barrier. We first present the photovoltaic responsivity above the gap. Its spectrum is explained by the combined effects of absorption and diffusion. The hole diffusion length is estimated to be in the 0.1 {mu}m range with a ...
I will discuss recent results of surveys for galaxies in the redshift range z=2-3 sensitive to star formation/AGN activity in galaxies as well as the diffuse gas in the circum-galactic (CGM) and intergalactic medium (IGM) in the same survey volumes at high redshift. In particular, I will focus on what we have learned about the influence of energetic processes ("feedback" from ...
The two-group neutron diffusion equations are developed with one equation referring strictly to thermal neutron events only, and the other to epithermal events. Particular attention is paid to averaging the diffusion parameters correctiy over the appropriate region of the neutron velocity spectrum adopted. The effects of epithermal neutron ...
We consider the Helmholtz problem in the context of the evolution of uniform initial distribution of a physical attribute in general porous media subject to a partially absorbing boundary condition. Its spectral property as a reflection of the boundary geometry has been widely exploited, such as in biological and geophysical applications. We consider the situation where the ...
The opening of voltage-dependent calcium channels results in an influx of calcium ions promoting the fusion of synaptic vesicles. The fusion leads to release of neurotransmitters, which in turn allow the propagation of nerve impulses. A Monte Carlo model of the diffusion of calcium following its surge into the cell is used to estimate the probability for exocytosis. Besides ...
The effect of alpha irradiation on self-diffusion in lead was studied at such temperatures that the radioinduced defects are sufficiently mobile to be measurable. The strong absorption of the alpha recoil beams was used for the determination of the diffusion velocity. The results showed that an exact determination of the ...
The Utah State University Material Physics Group took part in the State of Utah Space Environment & Contamination Study by flying samples on the International Space Station aboard the Materials International Space Station Experiment 6 payload. Pre-flight and post-flight analysis include density measurements to determine mass loss, optical microscopy, ...
Irradiation of the exteriorized small bowel prolongs gastric emptying. It also decreases the rate of glucose and arabinose absorption from the small bowel but absorption of the glucose is influenced more severely. This suggests that phosphorylation is disturbed as well as the process of diffusion. However, the magnitude of ...
Radiation from high-power Q-switched lasers has been used recently in semiconductor research to anneal the lattice damage caused by ion implantation, diffuse surface-deposited dopant films, recrystallize doped amorphous films deposited on substrates, and remove precipitates present after conventional high-temperature dopant diffusion. All of these ...
The aim of optical tomography is to reconstruct the optical properties inside a physical body, e.g. a neonatal head, by illuminating it with near-infrared light and measuring the outward flux of photons on the object boundary. Because a brain consists of strongly scattering tissue with imbedded cavities filled by weakly scattering cerebrospinal fluid, propagation of ...
An efficient computation of the time-dependent forward solution for photon transport in a head model is a key capability for performing accurate inversion for functional diffuse optical imaging of the brain. The diffusion approximation to photon transport is much faster to simulate than the physically correct radiative transport ...
Determination of tissue optical parameters is fundamental for application of light in either diagnostics or therapeutical procedures. However, in samples of biological tissue in vitro, the optical properties are modified by cellular death or cellular agglomeration that can not be avoided. This phenomena change the propagation of light within the biological sample. Optical properties of human blood ...
Simultaneous imaging of absorption and scattering in dc diffuse optical tomography B. Harrach1 1 present new results on the fundamental non- uniqueness issue in dc diffuse optical tomography (DOT. Keywords-- diffuse optical tomography (DOT), dc intensity mea- surements, unique simultaneous recovery
The American Physical Society is an organization of more than 41,000 physicists worldwide. It is dedicated to the advancement and diffusion of the knowledge of physics. The APS publishes some of the world's leading physics research journals: the Physical Review series, ...
NSDL National Science Digital Library
... ABSORPTION. Subject Categories : ASTROPHYSICS NUCLEAR PHYSICS & ELEMENTARY PARTICLE PHYSICS. Distribution ...
... Title : THE PHYSICAL PROPERTIES OF SOME PALLADIUM ALLOY HYDROGEN DIFFUSION MEMBRANE MATERIALS,. Corporate Author : ...
... Accession Number : ADD122106. Title : A Nuclear Physics Method for the Determination of Hydrogen Diffusion Coefficients,. Corporate Author : ...
After some recalls on the physics of neutron resonance absorption during their slowing down, this paper presents the main features of the theoretical developments performed by the french school of reactor physics: the effective reaction rate method so cal...
Low energy photon absorption and the Gaunt factor of Bremsstrahlung are discussed. Physical hypothesis chosen to take account of the strong electron density of certain plasmas which greatly influence predictions relating to the emission or absorption of B...
This is incorrect physically but does allow the model to be used in combination with an X-ray photoelectric absorption model such as phabs. ...
... DRYING, MIXTURES, FLUIDS, EXTERNAL, ABSORPTION, SUSPENSION DEVICES, MELTING POINT, OINTMENTS, HEXANES, MEASUREMENT ...
... pathogenic or physical impairments inflicted through the skin. ... CHEMISTRY), MOLECULAR STRUCTURE, ABSORPTION SPECTRA, HYDROXIDES ...
... ANALYTICAL CHEMISTRY, FLUORESCENCE, LITERATURE ... INFORMATION SCIENCE ATOMIC AND ... PHYSICS AND SPECTROSCOPY. ...
Language: English ...
NBII National Biological Information Infrastructure
We propose a physical model for diffusion of H in Si containing impurities and defects. The diffusion occurs via several parallel mechanisms, involving complex formation (trapping) and dissociation (detrapping) at impurities and defects, hopping in lattic...
This document is part of Subvolume A `Gases in Gases, Liquids and their Mixtures' of Volume 15 `Diffusion in Gases, Liquids and Electrolytes' of Landolt-B�rnstein Group IV `Physical Chemistry'. It is part of the chapter of the chapter `Diffusion in Pure Gases' and contains data on diffusion of (1) nitrogen; (2) ...
