bluuebunny/crossref_metadata_2025 huggingface dataset:
DNA Base Bioisosteres, Bis-benzoxazoles, Exert Anti-proliferative Effect on Human Prostate and Breast Cancer Cells
Authors: AYAZ Furkan , KHEEREE Rusmeenee , ISSE Qadar Ahmed , ERSAN Ronak Haj , ALGUL Oztekin
Published: September 2018

A series of symmetric bis-benzoxazole derivatives were synthesized using one-pot cyclisation reaction between 4-chloro substituted 2-aminophenol and suitable dicarboxylic acids. Synthesized compounds’ anticancer activities were tested by using MTT assay on human prostate (DU145) and breast (MCF7) cancer cells. Screening results revealed that all compounds possessed a high level anti-cancer potential by significantly decreasing the cell proliferation in prostate and breast cancer cell lines. Our compounds exerted their anti-proliferative effects in a dose and time dependent manner. Our results suggest that they can be highly potent since they were biologically active even at low concentrations. Our study presents a series of new bis-benzoxazole based compounds with potential therapeutic effects against tumor cells. Therefore, characterization of new generation bis-benzoxazole derivatives will have a significant contribution on the development of new era anti-cancer drug candidates.
Analysis, Design, And Experimentation of a Buck Converter Based on the Three-state Switching Cell Operating in Overlapping Mode
Authors: De Seixas Falcondes José Mendes , Balestero Juan Paulo Robles , De Seixas Claudiner Mendes , Tofoli Fernando Lessa , Torrico-Bascopé Grover Victor
Published: September 2018

This work presents the detailed analysis of the dc-dc nonisolated buck converter based on the three-state switching cell operating in overlapping mode, which occurs when the duty cycle of the active switches is higher than 0.5. Only part of the load power is processed by the active switches due to the use of the autotransformer, thus reducing the peak current through the switches to half of the load current, as higher power levels can then be achieved by the proposed topology. The volume of reactive elements i.e. inductors and capacitors is also decreased since the ripple frequency of the output voltage is twice the switching frequency. Due to the intrinsic characteristics of the topology, total losses are distributed among all semiconductors. Another advantage of this converter is the reduced region for discontinuous conduction mode when compared to the conventional buck converter as demonstrated by the static gain plot. Besides, the input current is continuous and the ripple current is reduced, what is not verified in the classical buck converter. The theoretical approach is detailed through qualitative and quantitative analyses, design procedure, and a comparison with similar topologies. Finally, an experimental prototype rated at 1 kW is implemented, while the main experimental results are presented and adequately discussed to clearly identify its claimed advantages.
Modulação Pwm de Baixa Frequência Aplicada à Topologia Integrada Sepic Meia-ponte para o Controle da Intensidade Luminosa de Lâmpadas Fluorescentes
Authors: Fraytag J. , Da Silva M. F. , Schlittler M. E. , Alonso J. M. , Do Prado R. N.
Published: September 2018

Este artigo apresenta o projeto e o desenvolvimento de um reator eletrônico para o acionamento de lâmpadas fluorescentes sem eletrodos, operando em 250 kHz. Neste, propõe-se a incorporação de um controle da intensidade luminosa da lâmpada, baseado em um sinal PWM modulado em baixa frequência. A topologia é baseada em um conversor SEPIC (Single-Ended Primary Inductance Converter), empregado como estágio pré- regulador de fator de potência (PFP), integrado a um inversor Meia Ponte Ressonante, utilizado como estágio de controle de potência (CP). A integração entre esses dois estágios é proposta neste trabalho, com o principal intuito de reduzir o número de interruptores ativos, aumentando assim a confiabilidade do reator eletrônico proposto. Resultados experimentais ratificam a viabilidade da solução proposta, a qual atingiu uma faixa de controle de potência de aproximadamente 74% (100 W até 26 W).
Analisis Komposisi Biodiesel Hasil Konversi Minyak Biji Carica (Carica pubescens) Menggunakan Enzim Lipase Bekatul
Authors: Istiningrum Reni Banowati , Nurrokhmah Hastin , Wahyuni Astri Sri
Published: September 2018

Peningkatan konsumsi bahan bakar berbasis fosil mendorong berbagai penelitian untuk memproduksi bahan bakar yang bersifat terbarukan salah satunya biodiesel. Biodiesel adalah bahan bakar yang bersumber dari minyak nabati serta ramah lingkungan. Minyak biji carica berpotensi sebagai sumber minyak nabati untuk produksi biodiesel karena merupakan limbah home industry pengolahan buah carica dari Kabupaten Wonosobo dan merupakan nonedible oil. Penelitian ini bertujuan untuk memproduksi biodesel dari minyak biji carica secara enzimatis menggunakan enzim lipase yang diekstrak dari bekatul. Hasil penelitian ini menunjukkan sebesar 50,36 % minyak dapat diekstrak dari biji carica kering dengan komposisi terbesarnya adalah asam oleat. Enzim lipase dapat diekstrak dari bekatul menggunakan buffer pH 5,5 dengan nilai aktivitas sebesar 14,72 U/mL. Ekstrak enzim lipase ini juga menunjukkan sifat stabil selama penyimpanan 15 hari. Minyak biji carica berhasil dikonversi menjadi biodiesel dengan rasio molar minyak : metanol optimum adalah 1 : 6 dan rendemen yang dihasilkan sebesar 65,86% dengan kadar metil ester sebesar 98,7% relatif.
Adaptive Balancing of Robots and Mechatronic Systems
Authors: Ciupitu Liviu
Published: September 2018

Present paper is dealing with the adaptive static balancing of robot or other mechatronic arms that are moving in vertical plane and whose static loads are variable, by using counterweights and springs. Some simple passive and approximate solutions are proposed and an example is shown. The active and exact solutions by using adaptive real time control in the case of unknown variation of static loads are simulated on VIPRO platform developed at Institute of Solid Mechanics of Romanian Academy.
Hemodynamics in Cardiac Development 
Authors: Poelmann Robert E. , Gittenberger-de Groot Adriana C.
Published: September 2018

The beating heart is subject to intrinsic mechanical factors, exerted by contraction of the myocardium (stretch and strain) and fluid forces of the enclosed blood (wall shear stress). The earliest contractions of the heart occur already in the 10-somite stage in the tubular as yet unsegmented heart. With development the looping heart becomes asymmetric providing varying diameters and curvatures resulting in unequal flow profiles. These flow profiles exert various wall shear stresses and as a consequence different expression patterns of shear responsive genes. In this paper we investigate the morphological changes of the heart after changes the blood flow by ligation of the right vitelline vein in a model chicken embryo and analyze the extended expression in the endocardial cushions of the shear responsive gene Tgfbeta receptor III. A major phenomenon is the diminished endocardial-mesenchymal transition resulting in hypoplastic (even absence of) atrioventricular and outflow tract endocardial cushions, that might be lethal in early phases. The surviving embryos exhibit several cardiac malformations including ventricular septal defects and malformed semilunar valves related to a malposition of the aortopulmonary septum and the enclosed neural crest cells. We discuss the results in the light of the interactions between several shear stress responsive signaling pathways including Vegf, Notch, Pdgf, Klf2, eNos, Endothelin and Tgfβ/Bmp/Smad.
Mathematical Modelling of  RLC Circuit  Through Mixed Quadrature Rule
Authors: jena Saumya , Nayak Damayanti
Published: September 2018

In this study, a mixed rule of degree of precision nine has been developed and implemented in the field of electrical sciences to obtain the instantaneous current in the RLC- circuit for particular value .The linearity has been performed with the Volterra’s integral equation of second kind with particular kernel . Then the definite integral has been evaluated through the mixed quadrature to obtain the numerical result which is very effective. A polynomial has been used to evaluate Volterra’s integral equation in the place of unknown functions. The accuracy of the proposed method has been tested taking different electromotive force in the circuit and absolute error has been estimated.
The importance of Nutrition as an Integral Part of Disease Management Nestle Nutrition Institute Workshop Series, Volume 82
Authors: PREMALA PRIYADHARSINI V.
Published: September 2018

No Abstract.
Modeled and Measured Ecosystem Respiration in Maize–Soybean Systems Over 10 Years
Authors: Zhan Ming , Liska Adam J. , Nguy‐Robertson Anthony L. , Suyker Andrew E. , Pelton Matthew P. , Yang Haishun
Published: September 2018

Core Ideas

The combination of crop and soil models can predict daily measured CO2 emissions.

Crop residue is the main source of carbon inputs to soil and largely determines soil organic carbon.

Where residue is removed for biofuels, increased carbon emissions will occur.

Crop residue is an abundant resource for the potential production of biofuels, but a better understanding of its use on net carbon emissions must be developed to mitigate climate change. This analysis combines two established crop growth models (Hybrid‐Maize and Soysim) with a simple soil and crop residue respiration model to estimate daily ecosystem respiration (ERe) from maize and soybean; ERe was estimated to be the sum of CO2 emissions from the oxidation of the growing crop, crop residue, and soil organic carbon (SOC). Model‐estimated CO2 fluxes from irrigated continuous maize and irrigated maize–soybean cropping systems in eastern Nebraska were compared with tower eddy covariance measurements of CO2 fluxes from 2001 to 2010 from those fields. Modeled C emissions closely estimated measured seasonal patterns of CO2 dynamics and measured daily ERe (R2: 0.87, 0.84). Measured and modeled annual ERe values were also compared and better agreement was found in maize compared to soybean. As there are limited comparisons of modeled soil emissions with eddy covariance measured CO2 fluxes, this study is important for the validation of these types of models and to support their potential use in quantifying emissions from crop residue for biofuels.
The Alleopathic Compound Luteolin from Peanut Litter Affects Peanut Nodule Formation and the Rhizosphere Microbial Community
Authors: Wang Hong‐Wei , Tang Meng‐Jun , Su Chun‐Lun , Zhang Wei , Xu Ri‐Sheng , Guan Yong‐Xiang , Dai Chuan‐Chao
Published: September 2018

Core Ideas

Flavonoid luteolin can accumulate in consecutively monocultured peanut fields.

Luteolin treatment changes the rhizosphere microbial community of peanut.

Flavonoid luteolin in peanut residues may cause continuous cropping obstacles.

The flavonoid luteolin is a common flavone released from peanut (Arachis hypogaea L.) residues. Luteolin accumulates in consecutively monocultured soil and affects the growth and nodulation of continuously cropped peanut. A microcosm experiment was performed to determine the effects of luteolin released from peanut residue on peanut nodule formation and on the rhizosphere soil microbial community. Luteolin reached a maximum concentration of 0.42 μg g−1 soil in litterbag experiments, and the half‐life of luteolin at 2.5 to 40 μg g−1 soil varied from 1.13 to 2.91 d. Results from pot experiments indicate that soil with luteolin treatment inhibited peanut seedling nodulation and growth, soil dehydrogenase activity, microbial biomass carbon content, biofilm formation, and chemotactic response of Rhizobium sp. and changed the microbial community structures and abundances at concentration of luteolin as low as 0.42 μg g−1 in soil. This might explain why peanut performs poorly with continuous consecutive monocropping.
Trace Metal(oid) Accumulation in Edible Crops and Poplar Cuttings Grown on Dredged Sediment Enriched Soil
Authors: Assad Mohamad , Chalot Michel , Tatin‐Froux Fabienne , Bert Valérie , Parelle Julien
Published: September 2018

The development of a biomonitor in the context of multiple‐element contamination in urban environments was tested by comparing element transfer in edible crops and poplar (Populus trichocarpa Torr. × Populus maximowiczii A. Henry cutlivar ‘Skado’). A multielemental analysis was performed with various common edible crops (cucumber [Cucumis sativus L.], pepper [Capsicum annuum L.], cabbage [Brassica oleracea L.], and lettuce [Lactuca sativa L.]) and the Skado poplar cultivar grown on soils that received sediments dredged from water canals in the 1960s. Sediments were distributed unevenly on the soil, allowing us to sample two types of areas that were either weakly (Area 1) or highly (Area 2) contaminated, mainly by Cd, Pb, and Zn. We registered an accumulation of Cd and Zn in the edible parts of crops, with higher values recorded for leafy vegetables than for fruit vegetables. We did not detect any accumulation of Pb in the plant species studied. We calculated the fresh mass that must be consumed daily to reach tolerable daily intake (TDI) recommendations for each element and found evidence that Cd could be ingested in sufficient amounts to reach the TDI in this context. Poplar and pepper leaves accumulated more Cd and Zn than the edible parts of the study crops grown on both substrates, which suggests that poplar and pepper may be suitable species for biomonitoring element transfer to vegetation in this context.

Core Ideas

We estimated element transfer from a dredged sediment enriched soil to plants.

The suitability of poplar and edible crops as biomonitors was tested.

The ‘Skado’ poplar cultivar was confirmed to be a suitable biomonitor candidate

The pepper plant is a promising novel candidate in the context of urban gardening.
Students’ Writing Process for Project Ibunka: A Case Study of EFL Writers
Authors: Maolida Elis Homsini , Mustika Gilang
Published: September 2018

Project Ibunka is an online cross-cultural exchange program that has a text-based bulletin board discussion where the students from various cultures can write about several topics from school life to social issues and give comments to each other. In the context of this study, this program was used  as a media to develop students’ writing skill. This study aims to reveal the students’ writing process in the Project. This case study involved 15 English department students who took part in the project for more than twelve weeks. The data were collected through observation and interview and they were analyzed qualitatively. The findings reveal that most students experienced all stages of writing process from pre writing, drafting, revising, editting and publishing. However, the arrangement, the way the students put the stages into practice and how they applied their strategies in each stage were various. In pre writing, for example, the students experienced different mixture of conversation, silent thinking, reading some sources, clustering, and outlining strategies. In drafting, most students focused on writing their ideas and avoided losing the ideas by mixing the language while the others did revision and editting during drafting process. In revising and editting, the students asked for feedback and utilized technologies to help them improve their writing. Eventhough all students published their writing in Project Ibunka, each student had different experience of publishing process. It shows that all writers have their own way and strategy that work for them and what works for a writer may not work for another and vice versa.
Technology transfer management culture (education-based approach)
Authors: Omelyanenko Vitaliy , Semenets-Orlova Inna , Khomeriki Olena , Lyasota Lyudmyla , Medviedieva Yuliia
Published: September 2018

Research deals with the analysis of theoretical aspects of increasing the competence of scientists and experts, whose task is to work with technology as a good promotion of technology on the market with a view to its commercialization or search for technological solutions according to the tasks of the organization and to examine the startup methodology as a tool of improving the technology transfer skills efficiency. The new specifics of technology transfer management within the Education 3.0 paradigm are considered. In the paper, the authors analyze the technology transfer as important source of innovation creation and an integral part of business development. Target result of technologies introduction, implemented within limited period with limited resources as an innovative purpose of technology transfer, which is aimed at the best possible development of organization, is identified. The paper also suggests consider¬ing processes of technology development and technology transfer based on startup methodology.
Особенности локализации внутри- и межполушарных когерентных связей у лиц с разным профилем латеральной организации (ПЛО) и уровнем креативности
Authors: Саакян Оксана Сааковна
Published: September 2018

In this article describes the analysis of specific spatial-temporal organization of EEGin solving creative problems of different nature surveyed with certain individual characteristics.
Развитие психологической компетентности судебного психолога- эксперта в процессе профессиональной деятельности
Authors: Дорошева Ольга Александровна
Published: September 2018

At practice of the forensic and psychological expertise, the psychologists face the factthat each criminal affair is unique, each subject of the expertise is an individual, has hisown destiny, his own personal traits. In order to be considered as a highly-qualified specialistin the field of the forensic psychological expertise, it is not enough for a psychologistto acquire some professional patterns, it is necessary for him to have an individual style ofthe professional activity, to develop the psychological competence.
Особенности фармакологической регуляции функционального состояния пожилых людей
Authors: Tonkovtseva Valentina V. , Batura Inna A. , Vorobyeva Elena V. , Burikov Aleksei A.
Published: September 2018

Introduction. This paper reports a study of characteristics of pharmacological regulation of functional states in elderly adults by means of psycho-relaxation and aromatherapy sessions of various durations with the use of catnip oil. The assessment of functional states was carried out through the analysis of the main parameters of cardiovascular system and subjective estimates of respondents’ health, activity, and mood. This is the first study on the pharmacological effects of catnip essential oil on elderly adults’ functional states, depending on the diffusion duration (10, 20, and 30 minutes), monitored by psycho-relaxation recording.
Methods. The study used the following techniques: (a) recording of cardiovascular parameters (systolic blood pressure, diastolic blood pressure, pulse pressure, heart rate, minute blood volume, heart stroke volume, cardiac index, blood circulation index); (b) the Hospital Anxiety and Depression Scale (HADS); (c) the Technique for Measuring the Speed of Thought; (d) the Proofreading Test (modified version); (e) Ivanov-Smolensky proofreading tables; and (f) self-assessment diagnostic technique by Dembo-Rubinstein (modified by A. M. Prikhozhan).
The study participants were 324 adults aged 50–90 years, including 94 hypertensive respondents who were registered at social services centers for elderly and disabled citizens in Yalta and Simferopol (the Republic of Crimea).
Results. The study results show that a 10- or 20-minute non-invasive pharmacological exposure to aromatherapy with the use of catnip oil can positively affect psychophysiological and psychoemotional states and mental working capacity in elderly adults.
Discussion. The data obtained indicate that aroma-relaxation treatment with the use of catnip essential oil positively affects functional states in elderly adults, reduces anxiety symptoms, and decreases pulse and systolic blood pressure.
Highlights

Pharmacological exposure to catnip essential oil (EO) combined with the psycho-relaxation and aromatherapy treatment can positively affect psychophysiological and psychoemotional states and mental working capacity in elderly adults.
Inhaling catnip essential oil (1 mg/m3) for 10 and 20 minutes reduces situational anxiety. A 30-minute aromatherapy session with the use of catnip essential oil increases the speed of thought. Inhaling catnip essential oil for 10, 20, and 30 minutes increases mental working capacity and subjective self-rating of the overall respondents’ condition, health, mood, vitality, and attention.
Aroma-relaxation treatment with catnip essential oil has a pronounced impact on basic parameters of cardiovascular system in hypertensive elderly adults.
Многослойные InGaAs-гетероструктуры "квантовая яма-точки" в фотопреобразователях на основе GaAs
Authors: Минтаиров С.А. , Калюжный Н.А. , Надточий А.М. , Максимов М.В. , Неведомский В.Н. , Сокура Л.А. , Рувимов С.С. , Шварц М.З. , Жуков А.Е.
Published: September 2018

AbstractGaAs photovoltaic converters containing quantum well-dot (QWD) heterostructures are studied. The QWD properties are intermediate between those of quantum wells (QWs) and quantum dots. The QWDs are obtained by the epitaxial deposition of In_0 . 4Ga_0 . 6As with a nominal thickness of 8 single layers by metal-organic vapor phase epitaxy. QWDs are a dense array of elastically strained islands that localize carriers in three directions and are formed by a local increase in the indium concentration and/ or InGaAs-layer thickness. There are two quantum-well levels of varied nature in structures with QWDs. These levels are manifested in the spectral characteristics of GaAs photovoltaic converters. A short-wavelength peak with a maximum at around 935 nm is associated with absorption in the residual QW, and the long-wavelength peak (1015–1030 nm) is due to absorption in the QWDs. Investigation by transmission electron microscopy demonstrates that an increase in the number of InGaAs layers leads to stronger elastic stresses, which, in turn, increases the carrier confinement energy in the QWDs and lead to a corresponding long-wavelength shift of the internal quantum efficiency spectrum.
Моделирование уровней размерного квантования Si-нанокристаллов в матрице SiO-=SUB=-2-=/SUB=-: подбор параметров эмпирического метода сильной связи
Authors: Белолипецкий А.В. , Нестоклон М.О. , Яссиевич И.Н.
Published: September 2018

AbstractThe problem of the optimal choice of parameters of the empirical tight-binding method to simulate the quantum-confined levels of Si nanocrystals embedded into an amorphous SiO_2 matrix is studied. To account for tunneling from nanocrystals to SiO_2, the amorphous matrix is considered as a virtual crystal with a band structure similar to that of SiO_2 β-cristobalite and with a lattice constant matched to the lattice constant of bulk Si. The electron density distributions in k space for electrons and holes quantum-confined in a Si nanocrystal in SiO_2 are calculated in a wide energy region, which provides a means to see clearly the possibility of the existence of efficient direct optical transitions for hot electrons at the upper quantum-confined levels.
Выращивание монокристаллов FeIn-=SUB=-2-=/SUB=-S-=SUB=-2-=/SUB=-Se-=SUB=-2-=/SUB=- и исследование их свойств
Authors: Боднарь И.В. , Детков С.А. , Касюк Ю.В. , Федотова Ю.А.
Published: September 2018

AbstractFeIn_2S_2Se_2 single crystals are grown for the first time by the Bridgman method, and their composition and properties are determined. It is found that the single crystals are hexagonal in structure. The arrangement of Fe ions in the structure of the FeIn_2S_2Se_2 crystals is studied by nuclear γ-resonance spectroscopy. From the transmittance spectra in the region of the fundamental absorption edge, the band gap of the single crystals grown in the study is determined.
Влияние условий синтеза и наночастиц олова на структуру и свойства композитных тонких пленок a-С:Н
Authors: Рягузов А.П. , Немкаева Р.Р. , Гусейнов Н.Р.
Published: September 2018

AbstractThe results of studies of the structure and properties of composite materials based on amorphous carbon ( a -C:H) films and tin nanoparticles are reported. The composite films are synthesized by the magnetron-assisted ion-plasma sputtering of a combined target in a 92%Ar : 4%CH_4 : 4%H_2 gas mixture. The dependence of the local structure of the a -C:H〈Sn〉 films on the conditions of synthesis and the content of Sn nanoparticles is clarified by means of Raman spectroscopy. The dependence of the photoluminescence intensity and the optical band gap of a -C:H〈Sn〉 films on the Sn content is shown.
Селективный эпитаксиальный рост III-N-структур с использованием ионной нанолитографии
Authors: Лундин В.В. , Цацульников A.Ф. , Родин С.Н. , Сахаров А.В. , Усов С.О. , Митрофанов М.И. , Левицкий Я.В. , Евтихиев В.П.
Published: September 2018

AbstractThe selective epitaxial growth of GaN by metalorganic vapor-phase epitaxy combined with ion-beam etching is investigated. To this end, partially masked GaN epitaxial layers are fabricated by depositing a thin Si_3N_4 layer onto the surface in a single technological process with the growth of GaN and the subsequent opening of windows of different shapes in this layer by an ion beam. Selective epitaxial growth regimes are studied. It is shown that, in a situation where the total area of the windows in the mask is small relative to the total area of the sample, the required epitaxy duration should be 5–10 s, which impairs the reproducibility of the parameters of the epitaxial process. It is also shown that the mechanism of the selective growth of submicrometer objects differs significantly from that for planar layers and selectively grown layers with dimensions of ~1 μm or greater. The effect of precursor (trimethylgallium and ammonia) fluxes on the character of selective epitaxy is examined. To investigate the possibilities of varying mask topology for fabricating model objects with regard to photonic crystals, the impact of the shape and orientation of the windows in the Si_3N_4 mask on the character of selective epitaxy is studied.
Рост наноструктур в системе Ga(In)AsP-GaAs в квазиравновесных условиях
Authors: Карлина Л.Б. , Власов А.С. , Сошников И.П. , Смирнова И.П. , Бер Б.Я. , Смирнов А.Б.
Published: September 2018

AbstractThe formation of nanostructures on the surface of GaAs under quasi-equilibrium conditions in a quasi-closed volume from saturated phosphor and indium vapors in the presence of a Au catalyst with growth according to the “vapor–liquid–crystal” mechanism is considered for the first time. The influence of the growth temperature and size of Au drops on the morphology and composition of the fabricated nanostructures is studied. Experimental data on the formation of Ga(In)AsP nanocrystals on GaAs substrates with various orientations are presented. It is established that the temperature growth range of the nanostructures when using this method is 540–640°C with a drop size from 30 to 120 nm. It is shown that the size of the catalyst drops substantially affects the morphology and growth rate of the fabricated nanostructures while their composition weakly depends on both the drop size and the substrate orientation.
Зернограничное проскальзывание и миграция специальных границ зерен в бикристаллах Al. Атомистическое моделирование
Authors: Карькина Л.Е. , Карькин И.Н. , Кузнецов А.Р. , Горностырев Ю.Н.
Published: September 2018

AbstractThe energy of grain boundary shears is calculated for symmetric grain boundaries (GBs) using ab initio methods and molecular-dynamic modeling in order to elucidate mechanisms that control GB shear-migration coupling in typical symmetric GBs, such as Σ3 (111), Σ5 (012), Σ5 (013) and Σ11 (113) tilt GBs, in Al bicrystal. The energy of generalized grain-boundary stacking faults (GB–SF) is determined, and the preferred directions and the energy barrier are established for grain-boundary slippage. It is shown that the relative slippage of neighboring grains at certain directions of particle shears is accompanied by conservative migration of GB in the direction perpendicular to its plain. The modeling data are comparative to known grain-boundary shear-migration coupling mechanisms in Al.
Экспериментальное исследование и анализ спектров поглощения ионов Ni-=SUP=-2+-=/SUP=- в ортоборате никеля Ni-=SUB=-3-=/SUB=-(BO-=SUB=-3-=/SUB=-)-=SUB=-2-=/SUB=-
Authors: Молчанова А.Д.
Published: September 2018

AbstractThe results of studies of the absorption spectra of nickel orthoborate Ni_3(BO_3)_2 in the range of electronic d – d -transitions are reported. The obtained data are analyzed in the framework of the crystal field theory. The Ni^2+ ions are located in two crystallographically nonequivalent positions 2 a and 4 f with point symmetry groups C _2 h and C _2, respectively, surrounded by six oxygen ions forming deformed octahedra. The absorption spectra exhibit three intense bands corresponding to spin-resolved transitions from the ground state of nickel ion ^3 A _2 g (^3 F ) to the sublevels of the ^3 T _2 g (^3 F ), ^3 T _1 g (^3 F ) and ^3 T _1 g (^3 P ) triplets split by the spinorbit interaction and the rhombic component of the crystal field. At temperatures below 100 K, the spectra exhibit a thin structure, in which phonon-free lines can be distinguished. Comparison of the calculated frequencies of the zero-phonon transitions with the experimental data allows estimating parameters of the crystal field acting on the nickel ions in the 2 a - and 4 f -positions, as well as the parameters of electrostatic interaction between the 3 d electrons and spin-orbit interaction constants.
Электрокалорический эффект в релаксоре магнониобате-скандонибате свинца
Authors: Смирнова Е.П. , Сотникова Г.Ю. , Зайцева Н.В. , Капралов А.А. , Гаврилов Г.А. , Сотников А.В.
Published: September 2018

AbstractThe electrocaloric effect and also the dielectric, pyroelectric, acoustic, and piezoelectric properties of a lead magnoniobate–scandoniobate solid solution in a biasing electric field have been studied. The dielectric and electromechanical contributions to the pyroelectric and electrocaloric effects are discussed.
Пылевая плазма в тлеющем разряде в магнитном поле до 3000 G
Authors: Дзлиева Е.С. , Новиков Л.А. , Павлов С.И. , Карасев В.Ю.
Published: September 2018

AbstractA glow discharge dusty plasma in a magnetic trap in which the current channel narrows is obtained in moderate magnetic fields up to 3000 G. The results of initial experiments are reported. The formation of stable dusty plasma structures rotating at record-high angular velocities up to 15 rad/s is observed. The dependence of the angular velocity on the strength of the applied magnetic field is measured experimentally. We interpret it quantitatively on the basis of the ion drag force.
Асимметрия дефектной структуры полуполярного GaN, выращенного на Si(001)
Authors: Калмыков А.Е. , Мясоедов А.В. , Сорокин Л.М.
Published: September 2018

AbstractThe defect structure of a thick (~15 μm) semipolar gallium nitride (GaN) layer grown by hydride–chloride vapor phase epitaxy on a Si(001) substrate with buffer layers has been studied by transmission electron microscopy. The asymmetry of the defect structure of GaN epilayer has been revealed and analyzed. The influence of this asymmetry on the rate of decrease in the density of threading dislocations in the growing epitaxial layer is discussed.
Коррелированное изменение электрических характеристик тонкопленочного полевого транзистора при модификации физических свойств его оксидного полупроводникового канала (InZnO : N)
Authors: Черемисин А.Б. , Кулдин Н.А.
Published: September 2018

AbstractWe have studied changes in the transmission and current–voltage characteristics of a thin-film field-effect transistor (TFT) during modification of the physical properties of its oxide semiconductor channel based on InZnO:N layer. Modification of the electrical parameters of the device was based on the phenomenon of photoinduced charge accumulation in the semiconductor. It is established that the slopes and intercepts of the capacitance–voltage ( C _G– V _G) and transmission ( I _D– V _G) curves of the TFT under illumination exhibit correlated similar variations. The obtained results justify joint use of the C _G– V _G and I _D– V _G curves in the analysis of peculiarities of the energy band structure of oxide semiconductors.
Recovery of Kidney Function in Children Treated with Maintenance Dialysis
Authors: Bonthuis Marjolein , Harambat Jérôme , Bérard Etienne , Cransberg Karlien , Duzova Ali , Garneata Liliana , Herthelius Maria , Lungu Adrian C. , Jahnukainen Timo , Kaltenegger Lukas , Ariceta Gema , Maurer Elisabeth , Palsson Runolfur , Sinha Manish D. , Testa Sara , Groothoff Jaap W. , Jager Kitty J. ,   on behalf of the ESPN/ERA-EDTA Registry
Published: September 2018

Background and objectives

Data on recovery of kidney function in pediatric patients with presumed ESKD are scarce. We examined the occurrence of recovery of kidney function and its determinants in a large cohort of pediatric patients on maintenance dialysis in Europe.

Design, setting, participants, & measurements

Data for 6574 patients from 36 European countries commencing dialysis at an age below 15 years, between 1990 and 2014 were extracted from the European Society for Pediatric Nephrology/European Renal Association-European Dialysis and Transplant Association Registry. Recovery of kidney function was defined as discontinuation of dialysis for at least 30 days. Time to recovery was studied using a cumulative incidence competing risk approach and adjusted Cox proportional hazard models.

Results

Two years after dialysis initiation, 130 patients (2%) experienced recovery of their kidney function after a median of 5.0 (interquartile range, 2.0–9.6) months on dialysis. Compared with patients with congenital anomalies of the kidney and urinary tract, recovery more often occurred in patients with vasculitis (11% at 2 years; adjusted hazard ratio [HR], 20.4; 95% confidence interval [95% CI], 9.7 to 42.8), ischemic kidney failure (12%; adjusted HR, 11.4; 95% CI, 5.6 to 23.1), and hemolytic uremic syndrome (13%; adjusted HR, 15.6; 95% CI, 8.9 to 27.3). Younger age and initiation on hemodialysis instead of peritoneal dialysis were also associated with recovery. For 42 patients (32%), recovery was transient as they returned to kidney replacement therapy after a median recovery period of 19.7 (interquartile range, 9.0–41.3) months.

Conclusions

We demonstrate a recovery rate of 2% within 2 years after dialysis initiation in a large cohort of pediatric patients on maintenance dialysis. There is a clinically important chance of recovery in patients on dialysis with vasculitis, ischemic kidney failure, and hemolytic uremic syndrome, which should be considered when planning kidney transplantation in these children.
Foreign Direct Investment and Economic Growth in the Republic of Kosovo—Empirical Evidence
Authors: Thaçi Lumnije , Rushiti Merita
Published: September 2018

Whether Foreign Direct Investment (FDI) is beneficial to host country growth or not, it is a question debated since a long time (Acaravci & Ozturk, 2012). This paper will examine the flow of FDI and their impact on economic growth in the Republic of Kosovo. This correlation between FDI and economic growth will be studied through regression (Quantile Regression Median). The results of the study will be obtained using multiple regression to evaluate the effect of FDI on the economy, using secondary annual data from 2007 to 2017. In addition to the basic model to be used to assess the impact of FDI on total growth amount, we have also decomposed them into the second model: FDI in manufacturing and FDI in services as well as other FDI. The research results show that the impact of total FDI and FDI in manufacturing is negative and insignificant while the impact of FDI in services and other FDI is positive but insignificant to economic growth in Kosovo. Due to the importance of FDI, as an important source of capital in a transition country such as Kosovo, these results are informational for decision-makers to improve policies in order for the country to become more attractive in attracting FDI.
Development and Validation of the Mobile Dating App Gratification Scale: Effects of Sought Gratifications on User Behavior and Outcomes
Authors: Welch Jessica R. , Morgan Melanie
Published: September 2018

Mobile dating apps were created to meet the needs of Millennials, who tend to be more interested in casual relationships than serious dating. Despite their popularity, research has found that dating apps are not being used for their intended purpose. Two studies were conducted to develop and validate a scale for mobile dating app gratifications and to determine how individuals’ behavior varies based on their sought gratifications. Results indicate that there are four primary mobile dating app gratifications (Validation, Entertainment, Relationships, and Hookups) and that they vary between genders. Individuals who seek different gratifications also engage in different behaviors while using the app and achieve different relational outcomes. The study highlights implications for future research and additional use of the Mobile Dating App Gratification Scale.
Habitaciones de servico
Authors: Ortiz Daniela
Published: September 2018

En este análisis arquitectónico de casas pertenecientes a la clase alta limeña. El estudio hace énfasis en la "arquitectura de servicio;" el espacio vital otorgado a la trabajadora del hogar. El proyecto propone un señalamiento de esta habitación en comparativa con las dimensiones de los demás ambientes
de la casa y analiza su ubicación dentro de la misma. El estudio ha sido realizado con base en casas construidas entre los años 1930 y 2012. El proyecto presenta una selección de 16 casas, de las cuales se reproducen la fachada, los planos y la comparativa de dimensiones entre todas las habitaciones.
Deep Disagreement and the Virtues of Argumentative and Epistemic Incapacity
Authors: Barris Jeremy
Published: September 2018

Fogelin’s (1985) Wittgensteinian view of deep disagreement as allowing no rational resolution has been criticized from both argumentation theoretic and epistemological perspectives. These criticisms typically do not recognize how his point applies to the very argumentative resources on which they rely. Additionally, more extremely than Fogelin himself argues, the conditions of deep disagreement make each position literally unintelligible to the other, again disallowing rational resolution. In turn, however, this failure of sense is so extreme that it partly cancels its own meaning as a failure of sense. Consequently, it paradoxically opens new possibilities for sense and therefore rationally unexpected resolutions.
Response to Groarke : Figuring Sound
Authors: Eckstein Justin
Published: September 2018

This essay notes the tendency to reduce sound to a cause of something else. Such a position constrains theory construction to only cause and effect schemes. I argue that we should expand our understanding of sound to include what I term sound figures, which acknowledge that sounds can represent the world. I conclude by offering an understanding of sound fig-ures tied to their resonance.
Multicomponent synthesis of new bis(pyranpyrazole) and their antimicrobial-antioxidant evaluations
Authors: Yusuf Mohamad , Thakur Saloni
Published: September 2018

One-pot, three-component reactions were utilized to obtain a series of new symmetrical bis(pyranopyrazoles) built around six rigid linkers in good yields and in the short durations under normal conditions. The structures of the prepared compounds were confirmed using their IR, 1H-NMR, 13C-NMR and ESI-MS spectral parameters. The bis(pyranopyrazoles) 3b and 3f exhibited significant antimicrobial action against Klebsiella pneumoniae, Fusarium oxysporum and Penicillium glabrum at a minimum inhibitory concentration (MIC) value of 3.12 ?g mL-1, which is equivalent to the MIC of the standard drug. trans-Butene-linked bis(pyranopyrazole) 3f was also associated with a good radical scavenging activity similar to that of ascorbic acid (a standard antioxidant).
Optimization of ultrasound-assisted extraction of total polyphenolic compounds from Juglans nigra L. leaves
Authors: Gavrilovic Marijana , Rajkovic Katarina , Simic Valentina , Jeremic Sanja , Mirkovic Snjezana , Jevtic Aleksandra
Published: September 2018

The ultrasound-assisted extraction of Juglans nigra L. leaves was optimized with respect to total phenolic content (TP) of the extracts by varying the concentration of aqueous ethanol solution (E) and different solvent-to-solid ratio (S). The influence and optimum of the operating parameters (E and S) was examined using response surface methodology (RSM). The statistical criteria indicated the adequacy, reliability and precision of the developed RSM model. RSM showed that maximum extraction yield of TP 28.59 mg g-1 of draw plant was achieved at the optimal values of 50% E and 20 kg kg-1 S. Using the modelled optimized conditions, the detected relative difference between the predicted and the experimental yield was ?2.3 %. The determined TP content in the extracts varied from 12.54 to 29.26 mg GAE g-1 of dry plant indicated that J. nigra is a valuable source of phenolic substances. The extracts of J. nigra leaves obtained under optimal conditions showed good antioxidant activity (IC50 = 18.91?0.03 ?g cm-3) which was determined by the scavenging effect on 2,2-diphenyl-1-picrylhydrazyl radical. The optimization of the TP extraction process is the important step in improving techno-economics of the potential commercial preparation of J. nigra extracts, as natural source of antioxidants.
Antioxidative response of Melissa officinalis L. and Valeriana officinalis L. leaves exposed to exogenous melatonin and excessive zinc and cadmium level
Authors: Hodzic Elvisa , Balaban Milica , Suskalo Nevena , Galijasevic Semira , Hasanagic Dino , Kukavica Biljana
Published: September 2018

Heavy metals disturb the redox homeostasis of the plant cell. The indolamine hormone, melatonin, protects plants from oxidative damage by directly scavenging reactive oxygen species or by stimulating the activity of antioxidant enzymes. The antioxidative role of melatonin in the leaves of two medicinal plants, lemon balm (Melissa officinalis L.) and valerian (Valeriana officinalis L.) that were treated with increased concentrations of Zn and Cd 24 h after sowing at an open field, were investigated. The plants were treated with Zn, Cd, melatonin and a mixture of melatonin with the mentioned metals. Exogenously added melatonin increased the endogenous melatonin concentration in lemon balm leaves. However, in the valerian leaves, lower or the same endogenous melatonin level was detected. The significantly higher concentration of endogenous melatonin in both plants was measured after treatment with Zn. As the results showed, changes in superoxide dismutase (SOD) and peroxidase (POD) activities are species-specific and change depending on the plant development phase, and the type of treatment. Melatonin pretreatment induced alternation in SOD isoenzyme profiles and activities as well as POD activity in both plant species treated with heavy metals.
S-O acetyl rearrangement in 6-thio-D-glucose derivatives
Authors: Popsavin Velimir , Popsavin Mirjana , Miljkovic Dusan
Published: September 2018

The solvolytic reaction of 1,2-O-isopropylidene-3,6-di-O-(p-toluenesulphonyl)- ?-D-glucofuranose (2), as well as that of 6-chloro-6-deoxy-1,2-O-isopropylidene-3-O-(p-toluenesulphonyl)-?-D-glucofuranose (3), in the presence of potassium thioacetate unexpectedly gave the 6-S-acetyl-5-O-acetyl derivative 5 as the main reaction product. A possible mechanism of these transformations was postulated whereby the main role was ascribed to a neighbouring group participation process, involving hydrogen thio-orthoester formation as an intermediate. The regiospecific monosubstitution of the 6-tosyloxy group in compound 2 was successfully achieved with potassium thioacetate, in presence of 2,3-benzo-15-crown-5 as a catalyst. The corresponding 6-S-acetyl derivative 7 was obtained representing a possible intermediate in the mentioned solvolytic reactions. Compound 7 was shown to be very reactive, since it fully transformed into the corresponding mercaptan 8 in the presence of silica gel. This transformation occurred via the same thio-orthoester 7a as in the mentioned solvolytic reactions of furanoses 2 and 3. The synthesized compounds are key intermediates in the planned synthesis of selected natural products and their analogues.
Multiyear indoor radon variability in a family house - a case study in serbia
Authors: Udovicic Vladimir , Maletic Dimitrije , Banjanac Radomir , Jokovic Dejan , Dragic Aleksandar , Veselinovic Nikola , Zivanovic Jelena , Savic Mihailo , Forkapic Sofija
Published: September 2018

The indoor radon behavior has complex dynamics due to the influence of the
large number of different parameters: the state of indoor atmosphere
(temperature, pressure, and relative humidity), aerosol concentration, the
exchange rate between indoor and outdoor air, construction materials, and
living habits. As a result, indoor radon concentration shows variation, with
the usual periodicity of one day and one year. It is well-known that
seasonal variation of the radon concentration exists. It is particularly
interesting to investigate indoor radon variation at the same measuring
location and time period, each year, due to estimation of individual annual
dose from radon exposure. The long-term indoor radon measurements, in a
typical family house in Serbia, were performed. Measurements were taken
during 2014, 2015, and 2016, in February and July, each year. The following
measuring techniques were used: active and charcoal canisters methods.
Analysis of the obtained results, using multivariate analysis methods, is
presented.
Radiological and physicochemical properties of red mud based geopolymers
Authors: Boskovic Ivana , Nenadovic Snezana , Kljajevic Ljiljana , Vukanac Ivana , Stankovic Nadezda , Lukovic Jelena , Vukcevic Mira
Published: September 2018

A significant amount of red mud generated as a by-product of the Bayer
process in the aluminum industry may cause environmental problems if
appropriate treatment is not carried out. The presented research dealt with
the possibility of application of red mud as a pigment or as raw material
for use in the construction material industry. In relation to the aim of
this work, the physicochemical characterization was performed and the
natural radioactivity of red mud as an industrial waste and a geopolymer
sample based on it was determined. The presented research is a
contribution to the potential solution for environmental protection through
the synthesis of possible construction material based on red mud.
The radiological hazard orginating from 226Ra, 232Th, and 40K in the
samples was assesed throught the absorbed dose rate and the annual effective
dose rate, calculated in accordance with the UNSCEAR 2010 report.
Physicochemical characterization of all samples was conducted using X-ray
diffraction and diffuse reflectance infrared Fourier transform spectroscopy.
Influence of nuclear multiple scattering on axially channeled protons in a bent crystal
Authors: Stojanov Nace , Petrovic Srdjan , Jakimovski Dragan
Published: September 2018

The influence of nuclear multiple scattering on axially channeled protons
with an energy of 7 TeV through a bent <100> Si crystal, is presented in
this paper. The aims of the investigation are the processes correlated to
the axial channeling, such as dechanneling, angular distributions and
energy loss distribution. The data for these processes are generated via the
numerical solution of the proton equations of motion in the transverse
plane and the computer simulation method. In the simulations, the crystal
thickness is varied from 1 to 5 mm while the bending angle is varied from 0
to 20 mrad. The increasing of the transverse energy of axially channeled
protons is due to its multiple scattering by atomic strings and the bending
dechanneling mechanism. The analysis of the generated data shows that in the
cases we are considering, the dechanneling function, the energy loss
spectra, and the angular distributions do not undergo to any significant
changes when the effect of nuclear multiple scattering is included in the
ion-atom interactions.