Electron emission induced by X-ray radiation in secondary-emission porous materials was investigated. © 2000 MAIK “Nauka/Interperiodica”. Secondary-emission porous materials are widely used as a working substance in electromagnetic and corpuscular radiation detectors [1–5]. The detection process in this case is governed by the interaction between primary radiation and a porous material, fastpri...

Evaluation of Ammonia Emission Coefficient according to the use Compound Fertilizers when Cultivating Apples and Pears in Orchards-Ammonia emission,Compound fertilizes,Air pollution,Agriculture,Orchard

In this paper for the first time a precise theoretical analysis of efficiencies and power densities for nano-scaled thermionic vacuum gap devices is presented. Plane electrodes with nano-gaps will be treated first. With nonplanar electrodes (nanotips) enhanced electron field emission occurs, giving rise to new design options. The theories of field and thermionic emission are combined by calcula...

To study Assessing the impact of tillage practices on soil carbon losses dependents it is necessary to describe the temporal variability of soil CO2 emission after tillage. It has been argued that large amounts of CO2 emitted after tillage may serve as an indicator for longer-term changes in soil carbon stocks. Here we present a two-step function model based on soil temperature and soil moistur...

Small-x logarithmic enhancements arising from high-energy gluon emissions affect both the evolution of collinearly-factorized parton densities and partonic coefficient functions. With the higher collider energy reached by the LHC, the prospect of a future high-energy collider, and the recent deep-inelastic scattering (DIS) results at small-x from HERA, providing phenomenological tools for perfo...

This paper presents a numerical approach for simulating volatile organic compound (VOC) emissions from dry materials. The approach has been used to examine the VOC emissions from two particleboards. The emission study for the particleboards shows that a fairly good agreement of VOC concentrations between the model prediction and experimental data can be achieved by pre-calculating the partition...

We have studied the ultrafast dynamics of two-photon-pumped amplified spontaneous emission (ASE) from a single crystal by the time-resolved fluorescence upconversion technique. With the increase of two-photon pump intensities, the emission decay time is dramatically shortened by 30 times (from 3ns to approximately 87 ps), and the energy migration rate is acutely enhanced when ASE occurs. The st...

The emission from the vegetation canopy depends on the type of vegetation and the frequencies at which the emission is measured. For studying the vegetation canopy of a tree, the dielectric constant of its constituent is measured at microwave frequencies. In this study the dielectric constant is measured using waveguide cell method and its scattering coefficient is estimated using perturbation ...

Milstein, Adam B. Ph.D., Purdue University, August, 2004. Imaging of near-infraredfluorescence, absorption, and scatter in turbid media. Major Professor: Charles A.Bouman and Kevin J. Webb.A nonlinear, Bayesian optimization scheme is presented for reconstructing fluo-rescent yield and lifetime, the absorption coefficient, and the diffusion coefficient inturbid media, suc...