A new approach to the non-iteration conversion method for dielectric constant assessment

2014 ◽  
Vol 45 (1-4) ◽  
pp. 801-807 ◽  
Author(s):  
Dagmar Faktorová
Keyword(s):  
Dielectric Constant ◽  
New Approach ◽  
Conversion Method

Sulfidization in Alcoholic Solutions: A New Surface Passivation Method for GaAs

1995 ◽  
Vol 378 ◽  
Author(s):  
Vasily N. Bessolov ◽  
Andrew F. Ivankov ◽  
Elena V. Konenkova ◽  
Mikhail V. Lebedev
Keyword(s):  
Dielectric Constant ◽  
Laser Irradiation ◽  
Surface Passivation ◽  
Surface Recombination ◽  
Low Dielectric Constant ◽  
New Approach ◽  
Low Dielectric ◽  
Acids And Bases ◽  
Sulfide Solution ◽  
Photoluminescence Efficiency

AbstractA new approach to GaAs surface passivation is suggested which consists in the treatment of GaAs in sulfide solutions in which different alcohols are used as solvents. It has been found that the photoluminescence efficiency of sulfide-treated GaAs associates with the dielectric constant of the solvent being used. With the decrease of dielectric constant value the PL intensity of sulfidized GaAs increases. Sulfidizing in isopropanol-, butanol- or t-butanol-based solutions leads to the formation of sulfide coat which PL properties remain constant even after strong laser irradiation. The effect of the solvent on the GaAs PL efficiensy is explained whithin the framework of hard and soft acids and bases. Thus the use of alcohol-based sulfide solution with low dielectric constant value greatly reduces surface recombination losses in sulfide-treated GaAs.

Modeling of Microwave Scattering From Cloud Ice Crystal Aggregates and Melting Aggregates: A New Approach

2010 ◽  
Vol 7 (3) ◽  
pp. 572-576 ◽  
Author(s):  
Giovanni Botta ◽  
Kültegin Aydin ◽  
Johannes Verlinde
Keyword(s):  
Dielectric Constant ◽  
Cross Sections ◽  
Melting Process ◽  
Effective Dielectric Constant ◽  
Ice Crystal ◽  
New Approach ◽  
Microwave Scattering ◽  
Spheroidal Shape ◽  
Cloud Ice ◽  
Scattering Cross Sections

Ice crystal aggregates and their melting process are modeled with a new approach for determining their microwave scattering characteristics and are compared with those obtained using effective dielectric constant representations. The aggregates are constructed from columnar crystals of random lengths (with the width being a function of the length), which are composed of a string of touching ice spheres with diameters equal to the column's width. The aggregates are melted using a model that incorporates the primary aspects of experimentally observed features of the melting process. The generalized multiparticle Mie method is used for computing the scattering cross sections of the dry and melting aggregates. The T-matrix method is used for computations involving a bulk representation of each aggregate with an effective dielectric constant model and an oblate spheroidal shape. The 3- and 35.6-GHz backscattering cross sections show significant differences between the two methods for both dry and melting aggregates. For sizes larger than 3 mm, these differences range from several decibels at 3 GHz to well over 7 dB at 35.6 GHz. Significant differences are also observed in the extinction cross sections during the melting process. It is concluded that the effective dielectric constant models of dry and melting ice crystal aggregates do not represent the interactions between the constituent crystals (and water droplets during melting) of the aggregates very well. Hence, bulk models must be used with caution particularly at millimeter wavelengths.

New approach for dielectric constant detection using a microstrip sensor

Measurement ◽  
2016 ◽  
Vol 93 ◽  
pp. 310-314 ◽  
Author(s):  
Sohrab Majidifar ◽  
Gholamreza Karimi
Keyword(s):  
Dielectric Constant ◽  
New Approach

scholarly journals New Approach for Calculating the Effective Dielectric Constant of the Moist Soil for Microwaves

2017 ◽  
Vol 9 (7) ◽  
pp. 732 ◽  
Author(s):  
Chang-Hwan Park ◽  
Andreas Behrendt ◽  
Ellsworth LeDrew ◽  
Volker Wulfmeyer
Keyword(s):  
Dielectric Constant ◽  
Effective Dielectric Constant ◽  
Moist Soil ◽  
New Approach

The O–C diagrams of minor planets − a new approach to modelling the rotation

1999 ◽  
Vol 173 ◽  
pp. 185-188
Author(s):  
Gy. Szabó ◽  
K. Sárneczky ◽  
L.L. Kiss
Keyword(s):  
Error Analysis ◽  
Time Dependence ◽  
Theoretical Work ◽  
Minor Planet ◽  
Minor Planets ◽  
New Approach ◽  
Preliminary Results ◽  
Ccd Observations

AbstractA widely used tool in studying quasi-monoperiodic processes is the O–C diagram. This paper deals with the application of this diagram in minor planet studies. The main difference between our approach and the classical O–C diagram is that we transform the epoch (=time) dependence into the geocentric longitude domain. We outline a rotation modelling using this modified O–C and illustrate the abilities with detailed error analysis. The primary assumption, that the monotonity and the shape of this diagram is (almost) independent of the geometry of the asteroids is discussed and tested. The monotonity enables an unambiguous distinction between the prograde and retrograde rotation, thus the four-fold (or in some cases the two-fold) ambiguities can be avoided. This turned out to be the main advantage of the O–C examination. As an extension to the theoretical work, we present some preliminary results on 1727 Mette based on new CCD observations.

A New Approach to the Demonstration of Oxidase-Localization Using Tannic Acid Or Catechin

1973 ◽  
Vol 31 ◽  
pp. 698-699
Author(s):  
V. Mizuhira ◽  
Y. Futaesaku
Keyword(s):  
Cross Section ◽  
Tannic Acid ◽  
Elastic Fiber ◽  
The Other ◽  
New Approach ◽  
Tissue Block ◽  
Active Reaction ◽  
The Cross

Previously we reported that tannic acid is a very effective fixative for proteins including polypeptides. Especially, in the cross section of microtubules, thirteen submits in A-tubule and eleven in B-tubule could be observed very clearly. An elastic fiber could be demonstrated very clearly, as an electron opaque, homogeneous fiber. However, tannic acid did not penetrate into the deep portion of the tissue-block. So we tried Catechin. This shows almost the same chemical natures as that of proteins, as tannic acid. Moreover, we thought that catechin should have two active-reaction sites, one is phenol,and the other is catechole. Catechole site should react with osmium, to make Os- black. Phenol-site should react with peroxidase existing perhydroxide.

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