bluuebunny/crossref_metadata_2025 huggingface dataset:
Molecular Structure, vibrational spectra, Molecular Docking and ADMET Study of Cellulose Triacetate II-=SUP=-*-=/SUP=-
Authors: Celik Sefa , Demirag A. Demet , Ozel Aysen E. , Akyuz Sevim
Published: May 2020

People have started to look for alternative sources because of the health problems created by petrochemical products used in all areas of human life and environmental problems that remain intact in nature for years. In this study, molecular structure analysis of cellulose triacetate II (CTA II) molecule, obtained from cellulose II and acetate, was carried out. There is an important relationship between the structure and activity of molecules, so it is very important to determine the geometric structure of a molecule. Therefore, using density functional theory (DFT) the most stable molecular geometries of the cellulose triacetate II monomer (C12H18O9) as well as dimer (C24H36O18), which included intermolecular H-bonding, were calculated. The analogous calculations were carried out for the (CTA-II)2 nano-cluster (C24H34O17), which represents the local structure of CTA-II crystal, and created by binding the two most stable CTA II molecules by covalent bond. Scaled wavenumbers and potential energy distribution of the vibrational modes of CTA monomer and (CTA-II)2 nano-cluster were computed. In order to evaluate the interaction of CTA II with the Aspergillus niger cellulase enzyme,which is an important that is active in cellulose digestion and CTA II, molecular docking studies were carried out. H-binding interactions between CTA II (in monomeric, dimeric and cluster forms) and the active site of the Aspergillus niger cellulase enzyme were shown. Moreover, in silico ADMET prediction study was calculated for CTA-II monomer to predict its druglikeness properties. Keywords: Cellulose triacetate II, Density Function Theory, IR-ATR, cluster for.
Квазиоптическое уравнение в среде со слабой диссипацией
Authors: Розанов Н.Н.
Published: May 2020

Проведен анализ вида квазиоптического уравнения для импульса монохроматического излучения, распространяющегося в однородной или одномерно неоднородной линейной среде с диссипацией. Для слоя неоднородной среды получены эффективные параметры эквивалентной однородной среды. Ключевые слова: квазиоптическое приближение, диссипативные эффекты.
Спектроскопия слоев на плоскопараллельных подложках
Authors: Сотский А.Б. , Михеев С.С. , Стаськов Н.И. , Сотская Л.И.
Published: May 2020

Integral expressions for the reflectance and transmittance spectra of the structure consisted of two thin layers deposited on opposite faces of a plane-parallel substrate at oblique illumination of the structure with partially coherent light are obtained. As a result of the asymptotic analysis of the integrals, approximate analytical formulae are established for calculating the indicated spectra, convenient for use in solving inverse spectrophotometry problems. An aluminum doped zinc oxide layer deposited on a glass substrate is studied. The spectra of the refractive index and absorption coefficient of the layer and the substrate, as well as the thickness of the layer, are determined by processing the reflectance and transmission spectra of the structure, measured for s- and p- polarized waves at two angles of light incidence. The found parameters are used in computational experiments to estimate the applicability limits of the formulated approximations.
О рассеянии света двухслойными эллипсоидами с несофокусными границами
Authors: Ильин В.Б. , Фарафонов В.Г. , Прокопьева М.С. , Устимов В.И.
Published: May 2020

New approaches to calculate the optical properties of small nonspherical layered particles whose layer boundaries are nonconfocal concentric coaxial ellipsoids are considered. A simple analytical approximation is suggested and substantiated for the case when the size of similar layer particles is much less than the wavelength of the incident radiation. It is found that this approximation provides the results with the accuracy of about 0.003 when the diffraction parameter x < 0.1. An approach to calculate the optical properties of nonconfocal ellipsoids by using a substitute of the nonconfocal boundaries with the confocal ones with keeping the layer volumes constant is justified. It is shown that for dielectric particles such an approach has the accuracy of a few percent for x < 1 and about 20% for x < 5. It is noted that both approximations are easily expanded on the case of multilayered nonconfocal ellipsoids.
Исследование аномальной генерации вертикально-излучающих лазеров спектрального диапазона 850 nm с двойной оксидной токовой апертурой при большой величине спектральной расстройки
Authors: Блохин С.А. , Бобров М.А. , Малеев Н.А. , Кузьменков А.Г. , Устинов В.М.
Published: May 2020

The static characteristics of 850 nm-range vertical-cavity surface-emitting lasers (VCSEL) based on strained InGaAs/AlGaAs quantum wells were studied in the wide range of oxide current aperture sizes and the origins of their anomalous behavior at large gain-to-cavity detuning was analyzed. The higher-order modes localized at the periphery of the oxide current aperture can appear in the studied VCSELs due to the lateral carrier spreading in the quantum wells and the specific profile of the oxide aperture (leading to the formation of a two-stage effective waveguide). Inhomogeneous carrier injection over the current aperture area in wide-aperture lasers leads anomalous start of lasing via high-order transverse modes, and the subsequent transition to the classical lasing via low-order modes with an increase in the current is due to a change of the gain-to-cavity detuning with an increase in the internal laser temperature. Anomalous lasing via higher-order modes in the case of narrow-aperture VCSELs becomes possible due to the increase in diffraction losses at the edge of the oxide current aperture for the fundamental mode, while the subsequent switching to the two-mode lasing is due to not only a decrease in the gain-to-cavity detuning, but also the thermal lens effect.
Перенос и пленение резонансного излучения в двухуровневой системе
Authors: Ямщиков В.М. , Рогачев В.Г. , Кудряшов Е.А. , Качалин Г.Н.
Published: May 2020

A theoretical research of the population kinetics of a two-level system with allowance for the transfer of spontaneous emission under continuous optical pumping is presented. It is shown that in the case when the photon mean free path in a resonantly absorbing medium is less than or comparable with the characteristic size of this medium, spontaneous emission can be an additional pump source. Two approaches were used to consider the influence of the spontaneous photon contribution to the kinetics of levels. The first approach is to solve the radiation transfer equation in the diffusion approximation. The second approach is related to the solution of the Bieberman-Holstein equation.
Спектральные характеристики полукольцевых квантово-каскадных лазеров
Authors: Бабичев А.В. , Пашнев Д.А. , Гладышев А.Г. , Курочкин А.С. , Колодезный Е.С. , Карачинский Л.Я. , Новиков И.И. , Денисов Д.В. , Дюделев В.В. , Соколовский Г.С. , Фирсов Д.А. , Воробьев Л.Е. , Слипченко С.О. , Лютецкий А.В. , Пихтин Н.А. , Егоров А.Ю.
Published: May 2020

A half-ring resonator design of a 7-8 μm range quantum-cascade laser with different radius values has been proposed and implemented. For a quantum-cascade laser with a radius of a half-ring resonator of 191 μm, lasing with a radiation spectrum width of 474 nm (82 cm^-1) was demonstrated at low temperatures. The FSR in such lasers was determined by the whispering gallery modes typical for ring resonators. At room temperature, the width of the lasing spectrum was 190 nm (31 cm^–1), which is caused by a decrease in gain and a possible increase in internal losses with increasing temperature. An increase in the cavity radius up to 291 μm made it possible to realize room temperature lasing with whispering gallery modes with a radiation spectrum width of 249 nm (40 cm^-1), by reducing losses on the mirrors.
Безошибочное различение когерентных состояний двухмодового оптического поля
Authors: Эскандери М.М. , Хорошко Д.Б. , Килин С.Я.
Published: May 2020

The procedure of a quantum measurement, the unambiguous state discrimination, is studied for the case of four two-mode coherent states of the optical field, interesting for information transmission via an optical communication channel. It is shown that a complex conjugation of the amplitude of one of the modes results in a better distinguishability of the states. An interferometric scheme is suggested for unambiguous discrimination of such states and the probability of successful discrimination is found. Applications of the considered state set are discussed for quantum cryptography, quantum teleportation and optical communications with a high level of loss.
Super-achromatic Quarter-wave Phase Retarder for Visible, Near Infrared and Short Wave Infrared Region Applications-=SUP=-*-=/SUP=-
Authors: Mukhopadhya N. , Saha A. , Bhattacharya K.
Published: May 2020

Phase retarders are essential components in optical system design as they can control the phase shifts associated with the vector components of incoming light waves and hence, decide the state of polarization. Different optical systems are designed to work at different wavelength spectrums. Most of these developments focus on the different wavelength regions between visible to infrared, of which the near infrared and short-wave infrared ranges are popular domains for defense and remote sensing applications. In this present communication, a super achromatic quarter-wave phase retarder consisting of four birefringent plates of different materials, i. e. KDP, crystalline quartz, ADP and ZnS has been proposed, to cover the visible, near infrared and short wave infrared regions from 400-2100 nm. As circularly polarized light is less affected by atmospheric conditions the use of an achromatic broadband quarter-wave phase retarder as proposed is quite useful. The proposed system shows acceptable performance over the intended range of wavelengths. Keywords: Wave plates, Super achromatic, Retarder, SWIR.
Differential Nonlinear Absorption of an Elliptically Polarized Femtosecond Vortex Beam in Tellurite Glass-=SUP=-*-=/SUP=-
Authors: Alshehria A.M. , Yousefa El Sayed , Alshahrania A.A. , Ibrahima Akram , Ahmada Nafis , Bhardwajb V.R.
Published: May 2020

We present differential nonlinear absorption of an elliptically polarized femtosecond laser vortex beam carrying an angular momentum of l = -1 in tellurite glass. Transmission measurements were utilized to measure the nonlinear absorption of the glass on a shot-by-shot basis, and to investigate the modification threshold for the beam. Additionally, the effect of pulse energy on the polarization ellipse was investigated. The results revealed a reduction in the ellipticity as the incident pulse energy was increased. Non-rotation of the ellipsoid indicated that there is no change in the third order nonlinear susceptibility (chi(3)) of the telluride glass upon irradiation by the femtosecond beam. The transmission of multiple pulses through the same spot revealed that although an effect was evident for the first ten pulses, the subsequent pulses had no effect. The transmission of a complete cycle of increasing and decreasing pulse energies revealed no hysteresis of the femtosecond laser vortex beam in tellurite glass in contrast to that reported for Gaussian beams in silica glass. Keywords: vortex beam, tellurite glass, nonlinear absorption.
Об электронной эмиссии из фокальной области симметрично сходящейся поверхностной плазмонной волны на свободной поверхности металлической пленки
Authors: Петрин А.Б.
Published: May 2020

Based on the theory of reflection of a plane electromagnetic wave from a plane-layered structure, the excitation and focusing of a radially converging surface plasmon wave on the free surface of a gold film in the Kretschmann scheme are considered. The distribution of the electric field in the vicinity of the focus on the free surface of the film is quantitatively studied. Based on this distribution and the theory of thermofield electron emission from a metal, the time averaged current of electron emission is estimated depending on the amplitude of the normal component of the electric field of the wave at the center of the focal distribution. It was shown that the main part of the emission current comes from a region around the focus center with a diameter of the order of a tenth of the working wavelength in vacuum, and a negligible part of the emission current comes from surrounding the central maximum of the diffraction rings.
Fractal Properties of CdTe Quantum Dots Dendrites-=SUP=-*-=/SUP=-
Authors: Kushchenko O.M. , Rudyi S.S. , Borodina L.N. , Cherevkov S.A. , Rozhdestvensky Yu.V.
Published: May 2020

Here we present the analyses of fractal properties of CdTe dendrites. The spectral characteristics of dendrites obtained at different acids of the initial solution were investigated. We demonstrate the displacement of the local luminescence peak depended on the branches of the dendritic structure. The fractal dimension has been calculated by the box-counting method. We obtained the correlation between the local peak of luminescence and the Minkowski dimension.
Photoactivation of CdSe Quantum Nanoplatelet Luminescence-=SUP=-*-=/SUP=-
Authors: Smelov V.N. , Maslov V.G. , Safin F.M. , Cherevkov S.A. , Baranov A.V. , Fedorov A.V.
Published: May 2020

The impact of irradiation with higher and lower quantum energy than that corresponding to the fundamental absorption band of CdSe nanoplatelets has been studied. We show that the irradiation wavelength and oxygen strongly influence the photoluminescence of nanoplatelets. We demonstrate also that irradiation of CdSe nanoplatelets dry layers leads to a reversible change in their photoluminescence quantum yield. Keywords: semiconductor nanoplatelet, excitonic luminescence, trap states, intermittent irradiation.
Photochemically Induced Circular Dichroism of Semiconductor Nanocrystals-=SUP=-*-=/SUP=-
Authors: Safin F.M. , Maslov V.G. , Dubavik A.Y. , Kolesova E.P. , Baranov A.V. , Fedorov A.V.
Published: May 2020

Here, we report an investigation of optical activity which was photochemically induced by illumination of QRs and DiRs with circularly polarized light; the photo-induced circular dichroism was quantitatively estimated, and it was shown that the photo-induced chemical reaction proceeds selectively, depending on the handedness of circularly polarized light. Keywords: chirality, optical activity, circular dichroism, photoinduced circular dichroism, semiconductor nanocrystals, quantum rods, quantum dot-in-rods.
Charge Transfer from Lead Sulfide Quantum Dots to MoS-=SUB=-2-=/SUB=- Nanoplatelets-=SUP=-*-=/SUP=-
Authors: Skurlov I.D. , Mudrak A.S. , Sokolova A.V. , Cherevkov S.A. , Baranov M.A. , Dubavik A. , Parfenov P.S. , Litvin A.P.
Published: May 2020

The research interest in the transition metal dichalcogenides (TMD) has been reborn a few years ago. This had happened due to the remarkable properties of monolayered TMD (e. g. high carrier mobility and high exciton binding energy) and due to the development of the exfoliation methods. Photoconductive MoS2-based devices spectral range can be expanded to the NIR by coupling them with PbS QDs. However, this requires extensive knowledge about the the charge and energy transfer processes in such systems. In this paper, we investigate charge transfer between PbS QDs and MoS2 nanoplatelets (NPls). Using the PL decay analysis, we show how the charge transfer efficiency changes with the distance between the QDs and NPls, as well as with QD size. Last, we demonstrate that the addition of the MoS2 NPLs increases the photoconductive response for up to an order of magnitude, as compared to the bare QD. Keywords: transition metal dichalcogenides, quantum dots, charge transfer, lead sulfide, molybdenum disulfide.
The Influence of the Schottky Barrier at the Metal/PbS NCs Junction on the Charge Transport Properties-=SUP=-*-=/SUP=-
Authors: Onishchuk D.A. , Parfenov P.S. , Dubavik A. , Litvin A.P.
Published: May 2020

The effect of the Schottky barrier height changes on the metal/EDT-treated (1,2-ethanedithiol) PbS nanocrystals film interface is considered. Also, the influence of shunts on the J-V characteristic and the Schottky barrier height is demonstrated, as well, the effect of silver oxide layer on the charge accumulation and tunneling. It is shown that the gold electrodes provide more stable results even when the Schottky barrier is formed, while the silver electrode provides more current. Keywords: semiconductor nanocrystals, Schottky barrier, charge carriers transport, thin films.
Fabrication of a Functional Relief on the Surface of a Polyvinyl Chloride Film by Nanosecond Laser Microtexturing-=SUP=-*-=/SUP=-
Authors: Krylach I.V. , Kudryashov S.I. , Olekhnovich R.O. , Sitnikova V.E. , Moskvin M.K. , Shchedrina N.N. , Uspenskaya M.V.
Published: May 2020

Modification of the surface of polyvinyl chloride (PVC) deposited on a copper foil under the influence of nanosecond laser radiation with different peaks fluence was studied by using infrared spectroscopy of attenuated total reflection and optical microscopy. The dependences of the wetting angle of the texture surface with water on the peak fluence of laser radiation were measured. The obtained various relief textures demonstrate a sharp drop in water contact angles from (~ 50o) to super hydrophilic (~ 15o), which allows us to design and fabricate micro-scale elements of laboratory devices for the tasks of bactericidal treatment, collection and removal of liquids, as well as their separation and purification. A stable increase in the contact angles of water with the surface of the textures to hydrophobic (~ up to 140o) observed over time indicates degradation of the polymer coating.
Photophysics of Titania Nanoparticle/Quantum Dot Hybrid Structures-=SUP=-*-=/SUP=-
Authors: Kolesova E.P. , Safin F.M. , Maslov V.G. , Dubavik A. , Gun'ko Y.K. , Orlova A.O.
Published: May 2020

The efficiency of the electron transfer in hybrid structures based on quantum dots of different architectures was studied. Electron transfer efficiency was estimated by two independent methods from the side of the electron donor (quantum dot) and acceptor (Titania nanoparticles). Structures based on core CdSe QDs with small diameter demonstrate the highest efficiency of electron transfer and ROS generation. The presence of the dark fraction of QDs in the ensemble reduces the functionality of hybrid structures and limits their practical applicability.
Carbon Nanotubes-Based Magneto-Optically Tunable Structure for Terahertz Wave Polarization Control-=SUP=-*-=/SUP=-
Authors: Kvitsinskiy A. , Demchenko P. , Litvinov E. , Masyukov M. , Anoshkin I. , Vozianova A. , Khodzitsky M.
Published: May 2020

Terahertz time-domain spectroscopic polarimetry (THz-TDSP) method was used to study of polarization properties of a randomly oriented single-walled carbon nanotube (SWCNT) thin film on a high resistivity monocrystalline silicon (Si) substrate in terahertz (THz) frequency range under an external optical pumping and an external static magnetic field. Frequency dependencies of azimuth and ellipticity angles of a polarization ellipse and the polarization ellipse at various frequencies of the electromagnetic waves transmitted through the Si substrate and the SWCNT on the Si substrate were obtained experimentally based on the system of the Stokes parameters. The results of the study of this magneto-optically tunable structure confirm the fact that, based on the Faraday effect in the SWCNT, it is possible to devise efficient tunable THz polarization modulators for use in physics, chemistry, medicine, and the latest security and telecommunication systems.
Photocatalytic Properties of Thermally Annealed Films of Titanium Butoxide-=SUP=-*-=/SUP=-
Authors: Lazareva A.A. , Kolesova E.P. , Baranov M.A. , Orlova A.O.
Published: May 2020

We show that titanium dioxide particles capable of Reactive oxygen species generation can be produced in titanium butoxide films by annealing them at 500oC. Optimal conditions for the films deposition by a modified Langmuir-Blodgett technique were selected basing on the film uniformity examined by optical and electron microscopy. The photocatalytic activity of the annealed film was tested using RNO sensor bleaching.
IR Luminescence of Polyfunctional Associates of Indocianine Green and Ag-=SUB=-2-=/SUB=-S Quantum Dots-=SUP=-*-=/SUP=-
Authors: Kondratenko T.S. , Smirnov M.S. , Ovchinnikov O.V. , Grevtseva I.G. , Latyshev A.N.
Published: May 2020

In this work, manifestations of IR luminescence sensitization of Indocyanine Green during conjugation with colloidal Ag2S quantum dots with average size of 2.2 and 3.7 nm, passivated with thioglycolic acid molecules (Ag2S/TGA QDs) are studied using absorption and luminescence techniques. The possibility of enhancing luminescence in the dye monomer band (820 nm) under excitation of 660 nm by a factor of 6 in the presence of Ag2S/TGA QDs (2.2 nm) due to a decrease in the dye polymethine chain due movement via coordination interaction with quantum dots was demonstrated. The way to switch-over from the first therapeutic window of biological tissue transparency (NIR-I, 700-950 nm) to the second (NIR-II, 1000-1700 nm), based on sensitization of IR luminescence of Ag2S/TGA QDs with an average size of 3.7 nm in the region of 1040 nm due to of resonance non-radiative transfer of excitation energy from Ag2S/TGA (2.2 nm) QDs at 900 nm to Ag2S/TGA QDs (3.7 nm) via the J-aggregate of ICG dye, which acts as an exciton bridge.
Theory of Holographic Formation in Multicomponent Photopolymer-Based Nanocomposites-=SUP=-*-=/SUP=-
Authors: Borisov V.N. , Lesnichii V.V.
Published: May 2020

The derivation of the three-component (monomer, chemically neutral component, and polymer) photopolymerization model from general thermodynamic considerations is presented. This model, together with another previously published one, are subject to a numerical solution for the case of a two-component one-dimensional diffusion (polymer component being steady). The divergence of results of work for both models was compared based on the average speed of the root-mean-square deviation in the spatial spectrum domain for relative volume fraction functions for all three components. Such a comparison was performed for 81 pairs of initial relative amount of neutral component and effective diffusion coefficient. The results of the work may serve as a good guide for the choice of parameters of experiments, which are aimed to verify the correctness of the modified theory. Keywords: photopolymerization, photoformer, holographic grating, multicomponent diffusion, polymer, holography.
Spatial Confinement of Microobjects in the Radiofrequency Ion Trap in a Viscous Medium-=SUP=-*-=/SUP=-
Authors: Romanova A.V. , Kosternoi I.A. , Rozhdestvensky Y.V.
Published: May 2020

In the present article a spatial confinement of microobjects were explored in the radiofrequency Paul trap at normal pressure. Spores of Lycopodium Clavatum, 33 μm in diameter, and CdSe/ZnS (core/shell) quantum dots conglomerates with size of 2-7 μm were used as such microobjects. Zero-crossing orbits of these objects were observed for the first time what indicates the nonlinear nature of dynamics of these particles in localization area. Mathematical descriptions of particle dynamics in a viscous is presented. It is shown that friction value depends on the radius of microobjects and dynamic viscosity. Moreover, zero-crossing orbits of charged particles in the radiofrequency Paul trap were numerically simulated. A new method of comparative analysis of the morphology of microparticles is proposed. Keywords: ion traps, non-linear dynamic, mass-spectrometry, biological objects.
Плазмонная активация и тушение люминесценции растворов полифениленвинилена (MEH-PPV) одно- и двустенными углеродными нанотрубками
Authors: Кучеренко М.Г. , Степанов В.Н. , Кручинин Н.Ю.
Published: May 2020

Spectral-luminescent properties of benzene and toluene solutions of poly[2-methoxy, 5-(2’- ethylhexyloxy)-1,4-phenylene-vinylene] (MEH-PPV) with additives of single - and double-walled carbon nanotubes (CNTS) were studied in order to detect manifestations of plasmon properties of CNTS in the luminescence of MEH-PPV solutions. It was found that the dependence of the luminescence intensity of the polymer solution on the CNT concentration is non-monotonic: with an increase in the number of dissolved nanotubes, this intensity initially increases, and then decreases. At the same time, the deformation of the light spectrum itself practically does not take place. The effect was observed as when using a single-walled CNT (swcnt) and double wall (DWNT). The depth of modulation of the glow intensity in the case of DPT was higher than in the case of ount. To explain the observed dependencies, various variants of the electro-dynamic model of activation-quenching of MEH-PPV luminescence by carbon nanotubes are proposed. Direct modeling of near and far field characteristics is performed based on Maxwell's equations, for numerical solution of which the finite difference method in the time domain (FDTD) is used. Computational experiments have shown that CNTS with a MEH-PPV layer have directional antenna properties, acting as a kind of waveguides. Thus, the energy of radiation that reached the far zone in the direction of the nanotube axis was an order of magnitude higher than in the case of a solution without CNT. Fan-type electromagnetic waves emanating from both ends of the nanotube were detected, as well as the stage of plasmon waves beating, which characterizes the nanotube as a waveguide. Molecular dynamic modeling of the configurations of the adsorbed MEH-PPV chain in various solvents, both on a single CNT and on two parallel CNTS with a variation in the distance between them, was performed. It was found that as the distance between CNTS increases, the conformational structure of MEH-PPV becomes more loose: there is an increase in the number of large loops of the macrocycle in the bulk phase of the solution
Дифракция и волноводное распространение света в эмали зуба
Authors: Грисимов В.Н.
Published: May 2020

На продольных меридиональных шлифах удаленных зубов исследовано распространения света в эмали зуба. Показано, что распространение света в эмали зависит от угла падения светового пучка относительно направления эмалевых призм. При падении лазерного пучка на эмаль перпендикулярно плоскости шлифа можно наблюдать упорядоченную картину дифракции на периодических неоднородностях, которые представлены параллельно расположенными внешними участками эмалевых призм. При падении лазерного пучка на поверхность зуба в плоскости шлифа картину распространения лазерного излучения в эмали можно объяснить волноводным распространением света по эмалевым призмам. На основе волноводной модели объясняются условия проявления известного оптического эффекта в виде полос Гунтера-Шрегера в отраженном и проходящем свете. Установлено, что наличие или отсутствие дифракционной картины, соответствующей дифракции на периодических неоднородностях эмали зуба, зависит от возраста зуба и толщины шлифа. Полученные данные позволяют сделать вывод о характере возрастной минерализации эмали в процессе ее созревания, которая приводит к увеличению прозрачности эмали и уменьшению степени ее оптической анизотропии. Ключевые слова: дифракция, волноводное распространение света, возрастные изменения эмали зуба.
Using Raman Spectroscopy to Investigate the Molecular Level Characteristics of Endometriosis-=SUP=-*-=/SUP=-
Authors: Akyuz Sevim , Celik Sefa , Usta Abdullah Taner , Ozel Aysen E. , -=SUP=-4-=/SUP=- Gozde Yi lmaz , Yi lmaz Salih
Published: May 2020

Endometriosis is a benign gynecologic disorder. It is particularly common among young women and may make pregnancy difficult. In this study molecular level characterization of endometriosis tissues were performed using Raman spectroscopy in combination with multivariate statistical analysis. Three hundred sixty-six Raman spectra recorded from different points of seventy two tissue samples, taken from the cyst walls of twelve patients were examined. Principle Component Analysis (PCA) followed by Linear Discriminant Analysis (LDA) were performed on the Raman data, and the samples were then classified into three groups; severe, moderate, and weak endometriosis. In the severe endometriosis group, the relative band intensities of DNA were increased. Moreover, increase in pyrrole moieties and kynurenine were seen. The results show that endometriosis severity correlates to increase in DNA concentration, and degradation of tryptophan due to increased indoleamine-pyrrole 2, 3-dioxygenase (IDO) activity, and an increase in kynurenine concentration and pyrrole intermediate. It is concluded that Raman spectroscopy is capable of providing a quick diagnosis, ahead of the pathology result being reported. Keywords: Endometriosis; Raman spectra, PCA-LDA analysis.
Измерение геометрических параметров мощного ИК лазерного луча в прифокальной области для применений в лазерно-плазменном источнике коротковолнового излучения
Authors: Белашов А.В. , Буторин П.С. , Задиранов Ю.М. , Калмыков С.Г. , Максимов В.А. , Сасин М.Э. , Сердобинцев П.Ю.
Published: May 2020

Measurements of geometric parameters of a powerful infrared laser beam have been realized by three methods. The results obtained are in a satisfactory agreement with each other. When focusing the beam with wavelength of 1.064 μm by means of a specially designed non-aberrational objective, a focal spot of ≈40μm diameter could been obtained, with the waist length being 230−280 μm. The measured parameters give an idea of the size of the laser plasma generated by this beam on the Xe gas microjet.
Megaciudades: contexto, cambio climático y el reto de la sostenibilidad urbana
Authors: Mendoza-Jaramillo Alejandro
Published: May 2020

El presente artículo ofrece una breve revisión teórica de tres posturas académicas y políticas para hacer intervención en las ciudades, a la luz de las necesidades y retos que platean el Cambio Climático y la Sostenibilidad Urbana: Contención Urbana, Creación de Espacios y Acupuntura Urbana. De esta manera, interesa conocer los alcances, limitaciones, convergencias y divergencias de tales posturas, para generar debate frente a las necesidades actuales que muestra la planificación de las Megaciudades. El artículo finaliza con algunas reflexiones en torno a los retos que implica el Cambio Climático y la Sostenibilidad Urbana.
Workshop on Implementation Science and Digital Therapeutics for Behavioral Health
Authors: Lord Sarah E , Campbell Aimee N C , Brunette Mary F , Cubillos Leonardo , Bartels Sophia M , Torrey William C , Olson Ardis L , Chapman Steven H , Batsis John A , Polsky Daniel , Nunes Edward V , Seavey Katherine M , Marsch Lisa A
Published: May 2020

Digital therapeutics can overcome many of the barriers to translation of evidence-based treatment for substance use, mental health, and other behavioral health conditions. Delivered via nearly ubiquitous platforms such as the web, smartphone applications, text messaging, and videoconferencing, digital therapeutics can transcend the time and geographic boundaries of traditional clinical settings so that individuals can access care when and where they need it. There is strong empirical support for digital therapeutic approaches for behavioral health, yet implementation science with regard to scaling use of digital therapeutics for behavioral health is still in its early stages. In this paper, we summarize the proceedings of a day-long workshop, “Implementation Science and Digital Therapeutics,” sponsored and hosted by the Center for Technology and Behavioral Health at Dartmouth College. The Center for Technology and Behavioral Health is an interdisciplinary P30 Center of Excellence funded by the National Institute on Drug Abuse, with the mission of promoting state-of-the-technology and state-of-the-science for the development, evaluation, and sustainable implementation of digital therapeutic approaches for substance use and related conditions. Workshop presentations were grounded in current models of implementation science. Directions and opportunities for collaborative implementation science research to promote broad adoption of digital therapeutics for behavioral health are offered.
Mobile Health Apps That Help With COVID-19 Management: Scoping Review (Preprint)
Authors: John Leon Singh Hanson , Couch Danielle , Yap Kevin
Published: May 2020

BACKGROUND

Mobile health (mHealth) apps have played an important role in mitigating the coronavirus disease (COVID-19) response. However, there is no resource that provides a holistic picture of the available mHealth apps that have been developed to combat this pandemic.

OBJECTIVE

Our aim is to scope the evidence base on apps that were developed in response to COVID-19.

METHODS

Following the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines for scoping reviews, literature searches were conducted on Google Search, Google Scholar, and PubMed using the country’s name as keywords and “coronavirus,” “COVID-19,” “nCOV19,” “contact tracing,” “information providing apps,” “symptom tracking,” “mobile apps,” “mobile applications,” “smartphone,” “mobile phone,” and “mHealth.” Countries most affected by COVID-19 and those that first rolled out COVID-19–related apps were included.

RESULTS

A total of 46 articles were reviewed from 19 countries, resulting in a total of 29 apps. Among them, 15 (52%) apps were on contact tracing, 7 (24%) apps on quarantine, 7 (24%) on symptom monitoring, and 1 (3%) on information provision. More than half (n=20, 69%) were from governmental sources, only 3 (10%) were from private organizations, and 3 (10%) from universities. There were 6 (21%) apps available on either Android or iOS, and 10 (34%) were available on both platforms. Bluetooth was used in 10 (34%) apps for collecting data, 12 (41%) apps used GPS, and 12 (41%) used other forms of data collection.

CONCLUSIONS

This review identifies that the majority of COVID-19 apps were for contact tracing and symptom monitoring. However, these apps are effective only if taken up by the community. The sharing of good practices across different countries can enable governments to learn from each other and develop effective strategies to combat and manage this pandemic.
Companion Dogs as Surrogate Family Members and the Compensation Hypothesis
Authors: Díaz Videla Marcos
Published: May 2020

The belief that bonding with companion animals seeks to substitute for human relationships has been widely held as common knowledge, receiving partial support even by scientific literature. This study aimed to assess the effect of compensation of lacking human bonds (i.e., partner and children) through bonding with companion dogs. For this, 425 adults living in Buenos Aires, who own a companion dog, filled out a form about Perceived Emotional Closeness and another one about anthropomorphism towards dogs. The fact of having children, regardless of the cohabitation with them and the guardian’s marital status, was linked to lower scores of emotional closeness; however, there were no differences in terms of the levels of dog’s anthropomorphism between guardians who lived with a couple or not, between those who had children or not, neither between those who lived with their children or not. Furthermore, among parent guardians, there was no difference in the levels of Anthropomorphism and Perceived Emotional Closeness in relationship with their children’s age. We concluded that dogs seem to have their own particular role within their guardian’s close circle of relationships, instead of competing with human family roles. Guardians who consider their dog as a child would not imply the substitution for absent children. For these guardians, this consideration would be rather related to their affection towards the dog. The differences in the emotional closeness among guardians with or without children are discussed according to a possible attitudinal change, after parenthood, that would lead to a lower interspecies affective permeability. Considering the particular role of dogs in the guardian’s emotional circle can lead us to the appraisal of the differential aspects of this interspecies relationship with positive consequences for both, humans and dogs.
Translational research: The ontological relation between adjunctive and stereotyped behavior case
Authors: Aguilar-Guevara Francisco , Camacho-Candía Josué , Lima-Villeda Natalia
Published: May 2020

Translational research has reported several benefits as a heuristic strategy of knowledge expansion. Given that some authors have found similarities between adjunctive behavior and stereotyped behavior, the present paper analyze if these two kinds of behavior could be raw material for translational research. As elements of the analytical work adjunctive andstereotyped behaviors were described in their relationship with timing and Autism Spectrum Disorder, respectively. Then, a morphological and a functional assessment between both types of behavior were carried out. Main results showed morphological similarities and functional differences between types of behavior which were discussed in terms of suitability for translational research and in terms of the analytical tools utilized.
Habilitación lingüística y corrección de la escritura con señalización de errores
Authors: López-Corral Alfonso , Acuña-Melendrez Karla Fabiola , Irigoyen-Morales Juan José , Córdova-Cárdenas Gilberto Manuel
Published: May 2020

Una manera de estudiar cómo escriben las personas es por medio de la noción de habilitación lingüística, definida como la facilitación de un desempeño en modo lingüístico activo (señalar, escribir o hablar) como resultado de la exposición a un modo lingüístico reactivo (observar, leer o escuchar). Investigaciones señalan que al revisar y corregir se hace contacto con la idea de lo que se ha escrito, más que con lo escrito en el texto. El objetivo de este estudio fue evaluar la exposición de estudiantes universitarios a los modos reactivos, sobre la habilitación lingüística del modo activo escribir y sobre la revisión y corrección cuando se les presenta el texto con los errores ortográficos señalados en rojo. Los participantes escribieron un texto sobre el ciclo del agua, después fueron expuestos a uno de los tres modos reactivos y, por último, se les presentó el texto para su revisión y corrección. Los resultados mostraron puntajes más altos en las categorías evaluadas en los grupos donde debían escuchar y leer para posteriormente escribir. Se encontró que los participantes hicieron correcciones a sus textos y que cometieron menos errores ortográficos en la postprueba. Los resultados se discuten en relación con la revisión y corrección de la escritura.
Convergence toward the European Social Model? Impact of EU accession on Polish social policy
Authors: Wiśniewski Jakub
Published: May 2020

In order to join the European Union (EU) Poland had to meet a wide range of conditions including adoption of acquis communautaire, significant administrative reforms and economic restructuring. This article deals with all these EU-membership commitments which directly influenced the Polish social policy, spanning such areas as free movement of persons (mainly workers), labour law, social dialogue, labour market and social inclusion policies and pensions. These changes - even if incremental and evolutionary - made the Polish welfare state more compatible with the European Social Model. Judging from the experience of Poland, the European Social Model (ESM) is far from vague and meaningless ideology. The ESM has had a significant impact on national social policies which is discernible at four general levels: values and general rules, which engender a welfare state philosophy shared by all Member States; Community-enforced social minimum standards; European-level institutional co-operative procedures; and monetary transfers in the framework of cohesion policy. The impact of the EU is visible to a varying degree – ranging from substantial in the peripheral areas such as gender equality or health and safety at work to purely theoretical in fiscal and monetary matters. The Polish welfare state has been heavily influenced by practical day-to-day administrative and institutional co-operation of Poland with the UE.

 

 

 

Full text available at: https://doi.org/10.22215/rera.v1i1.159
Service quality management from social capital, environmental uncertainty, and competitive intensity perspectives
Authors: Lin Xiang Qian , Chen You Cheng , Liu Chih-Hsing , Li Yong-Quan
Published: May 2020

We proposed an integrated model of service quality management by drawing on social capital theory. Participants were 588 employees in the banking sector in China. The results reveal that environmental uncertainty played a mediating role in the relationship between competitive intensity
and social capital development. We also found a positive relationship between environmental uncertainty and service quality management, as mediated by social capital. We further proposed several alternative models to examine the second-order factors of social capital and service quality management,
and to check the robustness of our findings. The original proposed model had the best fit for testing the hypotheses. Theoretical and managerial implications for service quality management are discussed.
A cultura escolar do ensino de matemática nos anos iniciais: um panorama nos grupos escolares em Anagé, Brumado e Guanambi – Bahia (1938-2000)
Authors: Amaral Rosemeire Dos Santos
Published: May 2020

A CULTURA ESCOLAR DO ENSINO DE MATEMÁTICA NOS ANOS INICIAIS: um panorama nos Grupos Escolares em Anagé, Brumado e Guanambi – Bahia (19382000) teve por objetivo identificar e analisar aspectos em que as cidades de Anagé, Brumado e Guanambi se aproximam, intercruzam (intersectam) ou se distanciam em relação à Cultura Escolar do Ensino de Matemática nos Anos Iniciais, considerando o panorama dos Grupos Escolares em uma perspectiva histórico-comparativa. A pesquisa perpassou por, pelo menos, quatro momentos: 1) O trajeto historiográfico – a idealização e constituição do objeto de pesquisa, o percurso percorrido até seu recorte, o estabelecimento teórico-metodológico, as atualizações, as práticas culturais; 2) A observação junto à Legislação do Estado da Bahia (1891-1972), componente que demarca as deliberações oficiais para o Ensino Público Primário, Grupos Escolares e Ensino de Matemática nos Anos Iniciais; 3) O delineamento espacial – uma descrição histórica da Criação dos Grupos Escolares na Bahia, identificando o contexto em que, em Anagé, Brumado e Guanambi, essa modalidade de ensino foi implantada; 4) A Construção – análise, por intermédio das fontes documentais, da relação de intersecção ou de distanciamento entre as cidades foco. Os resultados da pesquisa evidenciaram que aspectos, como As Práticas Culturais da Leitura e da Escrita, a materialidade escolar, os Programas de Ensino, os Exames Escolares e as medidas socioeducativas e disciplinares ou punitivas conformam uma Cultura Escolar do Ensino de Matemática nos Anos Iniciais.
Os Grupo Escolares no Brasil e o foco dado a disciplina Matemática: uma revisão bibliográfica
Authors: Santos Zenildo , Sant'Ana Claudinei Camargo de
Published: May 2020

Nossa produção versa sobre a implantação dos grupos escolares no Brasil e o foco dado a disciplina Matemática. Trata-se do recorte de uma pesquisa de mestrado em andamento do Programa de Pós-Graduação Stricto Sensu em Educação Cientifica e Formação de Professores,  que busca analisar o processo de escolarização dos conhecimentos matemáticos nos primeiros grupos escolares implantados no Município de Aiquara, com vista, a investigar a prática dos professores Matemática no período da implantação do grupo escolar, bem como compreender a orientação dada ao ensino de Matemática no período vigente a implantação do grupo escolar. Nesses termos, discorremos uma breve revisão bibliográfica sobre a implantação dos grupos escolares no Brasil e de que forma o ensino de matemática era difundido nos grupos escolares, com o objetivo de situar numa perspectiva histórica, o ensino de matemática no ensino primário.
Modelagem Matemática: Concepções de licenciandos em formação inicial
Authors: Pereira Ana Lúcia , Jolandek Emilly Gonzales , Mendes Luiz Otávio Rodrigues
Published: May 2020

O presente artigo apresenta um relato de prática sobre Modelagem Matemática realizada com licenciandos do 3º ano do Curso de Licenciatura em Matemática da Universidade Estadual de Ponta Grossa. As atividades desenvolvidas foram baseadas em duas modelagens: I – calcular a área do corpo humano e II – relação da numeração do calçado com o tamanho do pé, onde os alunos foram estimulados a participar ativamente desse processo. O trabalho teve como objetivo inserir o tema Modelagem Matemática (MM) no contexto de formação inicial de professores, pensando em como ela pode ser utilizada enquanto uma metodologia que pode ser empregada na sala de aula. A principal lição extraída dessa experiência foi a efetividade da metodologia de modelagem matemática em aprimorar o conhecimento matemático utilizado em cada uma das modelagens, a criatividade e a colaboração entre os licenciandos, tornando a aprendizagem mais significativa. Nossos dados apontam ainda que é preciso um investimento maior no uso de metodologias diferenciadas durante a formação inicial de professores.
A Geometria para ensinar de Olavo Freire: o Desenho Geométrico como ferramenta profissional
Authors: D´Esquivel Márcio Oliveira
Published: May 2020

Em 1894 é publicado o livro Primeiras Noções de Geometria Prática de Olavo Freire Diferentemente das obras do período, as orientações didáticas para o ensino de geometria proposta pelo livro de Freire coloca em evidência o desenho geométrico como ferramenta de trabalho para o professor ensinar geometria no curso primário. O trabalho em questão se propõe a analisar as possíveis referências tomadas para produção do livro. Interessa-nos compreender quais fatores concorreram para que o desenho geométrico fosse tomado como uma “geometria prática” para escola de ensino primário em tempo de primazia do método intuitivo. Como hipótese assume-se que juntamente com a produção de formas de ensinar geometria para escola primária, produz-se igualmente saber profissional para o ensino dessa disciplina.  O desenho geométrico que se apresenta como uma geometria para ensinar para a escola de ensino primário a partir da obra de Olavo Freire evidencia-se como uma sistematização para o contexto brasileiro das orientações para o ensino dessa disciplina na França na segunda metade do século XIX.
Apropriação de ideias Modernizadoras de Félix Klein em Práticas Docentes de Matemática no Colégio Gonzaga
Authors: Silva Circe Mary Silva da , Rios Diogo Franco
Published: May 2020

O trabalho apresenta um estudo sobre a apropriação das ideias de Felix Klein publicadas na obra A Matemática Elementar sob um Ponto de Vista Superior (1908), pelo jesuíta José Sachs, professor de matemática no curso ginasial do Colégio Gonzaga, em Pelotas-RS. Toma como referencial a teoria das transferências culturais e como eixo motivador um documento inédito:a carta de Sachs a Klein, escrita em 1910, encontrada no acervo da Biblioteca da Universidade de Göttingen. Constata-se que o documento apresenta um interessante potencial explicativo a respeito das iniciativas de modernização do ensino de matemática no Rio Grande do Sul, implementadas pelo referido professor em suas aulas. Constata-se, também, que o contexto sociocultural e educacional em que o Colégio e o professor estiveram inseridos ajudam a esclarecer as condições que viabilizaram que a obra chegasse tão rapidamente às mãos do professor e lhe possibilitasse realizar experimentações a partir das orientações ali presentes.