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Optimizing the design of GaAs/AlGaAs thin-film waveguides for integrated mid-infrared sensors

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Photonics Research 2016年第3期4卷 106-110页

作者： Markus Sieger boris Mizaikoff Institute of Analytical and Bioanalytical Chemistry Ulm University

Optical simulations of GaAs/AlGaAs thin-film waveguides were performed for investigating the dependence of the modal behavior on waveguide geometry and the resulting analytical sensitivity. Simulations were performed for two distinct mid-infrared wavelengths, thereby demonstrating the necessity of individually designed waveguide structures for each spectral regime of interest. Hence, the modal behavior, sensitivity, and intensity of the evanescent field were investigated via modeling studies at 1600 and 1000 cm^(-1), thereby confirming the utility of such simulations for designing mid-infrared sensors based on thin-film waveguide technology.

关键词： mode GaAs Optimizing the design of GaAs/AlGaAs thin-film waveguides for integrated mid-infrared sensors

A case of severe refractive changes induced by Galyfilcon A silicone hydrogel contact lenses

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International Journal of Ophthalmology(English edition) 2016年第1期9卷 175-177页

作者： boris Severinsky New England College of Optometry Boston 02115 USA

Dear Sir, I＇m boris Severinsky from the New England College of Optometry, Boston, USA. I write you to present an interesting case of extreme refractive and corneal topography changes induced by daily wearing of Acuv... 详细信息

关键词： A case of severe refractive changes induced by Galyfilcon A silicone hydrogel contact lenses case Vision Figure

Estimating geographic concentrations of quaternary industries in Europe using Artificial Light-At-Night (ALAN) data

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International Journal of Digital Earth 2017年第9期10卷 861-870,871-878页

作者： Natalya A.Rybnikova boris A.Portnov Department of Natural Resources and Environmental Management University of HaifaHaifaIsrael

Mapping geographic concentrations of quaternary industries(QIs)may help to assess regional performance and formulate informed development ***,fine resolution data on QIs concentrations are sparsely ***,for the year 2010,only 45%of all NUTS3 regions(*** of the third and most detailed level of the Nomenclature of Units for Territorial Statistics of the EU)provide relevant *** this study,we investigate a possibility that artificial light-at-night(ALAN),captured by satellite sensors,can help to identify geographic concentrations of *** this study,we use year-2010 NUTS3 Eurostat data,and combine them with data on ALAN intensities,obtained from the *** Meteorological Satellite Program(US-DMSP)for the years 2000 and *** both ordinary least squares(OLS)and spatial dependency(SD)models,ALAN emerged as a statistically significant predictor(t=8.392–14.608;P<.01),helping to explain,along with other predictors,up to 75%of QIs regional *** obtained models and regional data presently available enabled estimates of QIs concentrations for European NUTS3 regions with missing data.

关键词： Quaternary industries(QIs) artificial light-at-night(ALAN) NUTS3 regions Europe

Challenges in hydrogen adsorptions： from physisorption to chemisorption

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Frontiers of physics 2011年第2期6卷 142-150页

作者： Feng DING boris I. YAKOBSON Institute of Textile and Clothing Hong Kong Polytechnic University Kowloon Hong Kong China Department of Material Science and Mechanical Engineering Department of Chemistry Rice University Houston TX 77005 USA

In this short review, we will briefly discuss the story of hydrogen storage, its impact on clean energy application, especially the challenges of using hydrogen adsorption for onboard application. After a short comparison of the main methods of hydrogen storage （high pressure tank, metal hydride and adsorption）, we will focus our discussion on adsorption of hydrogen in graphitie carbon based large surface area adsorbents including carbon nanotubes, graphene and metal organic frameworks. The mechanisms, advantages, disadvantages and recent progresses will be discussed and reviewed for physisorption, metal-assisted storage and chemisorption. In the last section, we will discuss hydrogen spillover chemisorption in detail for the mechanism, status, challenges and perspectives. We hope to present a clear picture of the present technologies, challenges and the perspectives of hydrogen storage for the future studies.

关键词： hydrogen storage physisorption chemisorption spillover

Experimental and Numerical Study of Gas Dynamics of Exhaust Pipe of Gas Turbine Unit

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Journal of Thermal Science 2004年第1期13卷 34-39页

作者： Valery Solodov Juriy Starodubtsev boris Isakov Valentin Fedan NTU "KhNADU" 61002KharkovUkraineE-mail:solodovNTU "KhNADU"61002KharkovUkraineE-mail:solodovMashproeykt-ZoriaNikolaeyvUkraineMashproeykt-ZoriaNikolaeyvUkraine

A few geometrical configurations of exhaust pipe of marine gas turbine unit were investigated experimentally in NPP'Mashproeykt' (Nikolaeyv, Ukraine) and numerically with objective of solver verification and to determ... 详细信息

关键词： gas turbines inlet and outlet devices internal flow numerical simulation.

A simple semiempirical model for the static polarizability of electronically excited atoms and molecules

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Chinese Physics B 2023年第4期32卷 290-301页

作者： Alexander S Sharipov Alexey V Pelevkin boris I Loukhovitski Central Institute of Aviation Motors Aviamotornaya 2Moscow 111116Russia

We present a semiempirical analytical model for the static polarizability of electronically excited atoms and molecules,which requires very few readily accessible input data,including the ground-state polarizability,elemental composition,ionization potential,and spin multiplicities of excited and ground *** very simple model formulated in a semiclassical framework is based on a number of observed trends in polarizability of electronically excited *** adjust the model,both accurate theoretical predictions and reliable measurements previously reported elsewhere for a broad range of multielectron species in the gas phase are *** some representative compounds of general concern that have not yet attracted sufficient research interest,the results of our multireference second-order perturbation theory calculations are additionally *** show that the model we developed has reasonable(given the considerable uncertainties in the reference data)accuracy in predicting the static polarizability of electronically excited species of arbitrary size and excitation *** findings can be useful for many applications,where there is a need for inexpensive and quick assessments of the static gas-phase polarizability of excited electronic states,in particular,when building the complex nonequilibrium kinetic models to describe the observed optical refractivity(dielectric permittivity)of nonthermal reacting gas flows.

关键词： polarizability electronic excitation semiempirical model quantum chemistry

SERS-based lateral flow immunoassay of troponin I by using gapenhanced Raman tags

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Nano Research 2019年第2期12卷 413-420页

作者： boris N. Khlebtsov Daniil N. Bratashov Nadezhda A. Byzova boris B. Dzantiev Nikolai G. Khlebtsov Institute of Biochemistry and Physiology of Plants and Microorganisms Russian Academy of Sciences Saratov 410049 Russia Saratov State University Saratov 410012 Russia A. N. Bach Institute of Biochemistry Research Centre of Biotechnology Russian Academy of Sciences Moscow 119071 Russia

The lateral flow immuno assay (LFIA) has emerged as a powerful tool for rapid scree ning owing to its simplicity and flexibility for detection of various biomarkers. However, conventional LFIA strips have several disadvantages, including limits in quantitative analysis and low sensitivity. Here we developed a novel surface-e nhanced Rama n scatteri ng LFIA based on non spherical gap-e nhanced Raman tags (GERTs), with Raman molecules (RMs) embedded in a 1-nm gap between Au nanorod core and Au shell. Such tags have a strong and uniform surface-enhanced Rama n scattering (SERS) resp on se, an order of mag nitude higher than that of other comm on SERS tags such as Au nano rods, nano stars, Au nano shells with surface-adsorbed RMs, or spherical GERTs with embedded RMs. The feasibility of the tags was dem on strated by the semiqua ntitative and sen sitive detecti on of the heart disease biomarker cardiac tropo nin I (cTnI). GERTs were conjugated with mono clonal antibodies and used for LFIA in the same way as ordinary functionalized colloidal gold. The presenee of the target antigen, cTnI, was identified by Raman microscopy mapping of the test zone. With the SERS-based LFIA, the limit of cTnI detection was about 0.1 ng/mL. This value is within the diagnostic range of cTnI in the blood serum of patients with heart infarction and is 30 times lower than that of the colorimetric LFIA test using the same antibodies and either GERTs or colloidal gold as labels.

关键词： surface-enhanced Raman scattering (SERS) lateral flow immunoassay Au core/shell nanorods gap-enhanced Raman tags cardiac troponin I

A simple semiempirical model for the static polarizability of ions

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Chinese Physics B 2023年第8期32卷 32-45页

作者： Alexander S Sharipov boris I Loukhovitski Central Institute of Aviation Motors Aviamotornaya 2Moscow 111116Russia

A concise analytical model for the static dipole polarizability of ionized atoms and molecules is created for the first *** input,it requires,alongside the polarizability of neutral counterpart of a given ion,only the charge and elemental *** physically motivated semiempirical model is based on a number of established regularities in polarizability of charged monatomic and polyatomic *** order to adjust it,the results of quantum chemistry calculations and gas-phase measurements available for a broad range of ionized multielectron species are *** counteract the appreciable bias in the literature data toward polarizability of monoatomic ions,for some molecular ions of general concern the results of the authors'own density functional theory calculations are additionally invoked.A total of 541 data points are used to optimize the *** is demonstrated that the model we suggested has reasonable(given the substantial uncertainties of the reference data)accuracy in predicting the static isotropic polarizability of arbitrarily charged ions of any size and atomic *** resulting polarizability estimates are found to achieve a coefficient of determination of 0.93 for the assembled data *** created analytic tool is universally applicable and might be advantageous for some applications where there is an urgent need for rapid low-cost evaluation of the static gas-phase polarizability of ionized atoms and *** is especially relevant to constructing the complex models of nonequilibrium chemical kinetics aimed at precisely describing the observable refractive index(dielectric permittivity)of plasma *** data sets that support the findings of this study are openly available in Science Data Bank at https://***/10.57760/sciencedb.07526.

关键词： polarizability ions semiempirical model quantum chemistry

Genetic distinctness of parthenogenetic forms of European Polydrusus weevils of the subgenus Scythodrusus

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Insect Science 2012年第2期19卷 183-194页

作者： Lukasz Kajtoch boris Korotyaev Dorota Lachowska-Cierlik Institute of Systematics and Evolution of Animals Polish Academy of Sciences Krakow Poland Zoological Institute Russian Academy of Sciences St. Petersburg Russia Institute of Zoology Jagiellonian University Krakow Poland

Among eight species of Polydrusus weevils which belong to subgenus Scythodrusus, at least two possess parthenogenetic forms： P （S.） inustus and P （S.）pilifer. Both of these species consist of dioecious populations in the Caspian area and of parthenogenetic populations in Eastern Europe （R （S.） inustus）, the Caucasus region （both species） and Middle Asia （P （S.）pilifer）. The origin of parthenogenesis in this subgenus is unresolved; however some data suggest that the parthenogenetic forms are of hybrid ancestry. The genetic distinctness of parthenogenetic Scythodrusus was assessed on the basis of COII, ITS2, EFI-a and Wolbachia wsp, 16S ribosomal DNA, ftsZ and hcpA sequence comparisons. Both taxa turned out to be monophyletic for all markers, which is an evidence against hybridization of their dioecious ancestors. On the other hand, a high frequency of heterozygous P （S.） inustus females suggests an origin resulting from hybridization between genetically distinct dioecious representatives of this species. Very similar strains of Wolbachia supergroup A were found in both species, indicating that they have been either inherited from a common ancestor or were transmitted between parthenogenetic Scythodrusus weevils and probably spread randomly across their ranges.

关键词： Coleoptera Curculionidae hybridization parthenogenesis phylogeny Polydrusus Wolbachia