bluuebunny/crossref_metadata_2025 huggingface dataset:
Estrogen receptor and progesterone receptor status and their prognostic implications in pelvic high-grade serous carcinomas: A retrospective study
Authors: Zhao Ting , Gu Weiyong , Zhang Chenyun , Jiang Hongyuan , Lu Yuan
Published: November 2019

Background: There is mounting evidence that ovarian, tubal and peritoneal high-grade serous carcinoma (HGSC) share common origin. It was also suggested that extrauterine HGSCs may originate from endometrium. The aim of this study is to compare the estrogen receptor (ER) and progesterone receptor (PR) status among pelvic HGSCs, and to analyze the prognostic role of ER and PR in pelvic HGSCs patients, and the prognostic factors in patients with different ER or PR status Methods: In total, 283 patients diagnosed with ovarian, tubal, peritoneal, and uterine HGSC were retrospectively analyzed. All patients’ diagnosis were reviewed by a panel of gynecologists and pathologists strictly according to criteria based on lesion distribution. Results: Patients in endometrial group were older than ovarian (60.1±8.0 vs. 54.1±8.3, p=0.000) and tubal (60.1±8.0 vs. 55.8±9.5, p=0.008) group. A higher proportion of ovarian group presented with advanced stage disease than fallopian and endometrial group (73.7% vs. 47.2%, p=0.000 and 73.7% vs. 47.4%, p=0.002, respectively). PR positivity rate was much lower in peritoneal compared to ovarian group (25.0% vs. 65.6%, p=0.000). There was no difference in survival rates among four groups. Although ER and PR were not prognostic factors for 5-year overall survival (OS) and progression-free survival (PFS), the prognostic factors were different in patients of distinct ER/PR status. More chemotherapy cycles was a protective prognostic factor in ER(+) or PR(+) patients but not in ER(-) or PR(-) patients. P53 mutation was adverse prognostic factor for OS in PR(-) patients but in PR(+) patients. Conclusions: PR positivity rate were much lower in peritoneal compared to ovarian HGSC. Although ER and PR were not prognostic factors in pelvic HGSCs, prognostic factors for survival were different in patients of different ER/PR status.
Branch Retinal Vein Occlusion Causes Topographic Optic Neuropathy and Retrograde Maculopathy
Authors: Yu Siqing , Abegg Mathias , Liu Xuan , Zinkernagel Martin S. , Munk Marion R. , Ebneter Andreas
Published: November 2019

Background To evaluate retinal ganglion cell (RGC) loss and axonal affection in branch retinal vein occlusion (BRVO).Methods 13 eyes of 12 non-glaucomatous BRVO patients were included. Thickness of peripapillary and macular retinal nerve fiber layer (pRNFL, mRNFL), ganglion cell-inner plexiform layer (GCIPL), inner nuclear layer, outer and total retina were measured at baseline and after a mean follow-up of 14 months. We compared the thickness between the affected and their internal reference regions. Additionally, pRNFL thickness was compared between the occluded and the healthy fellow eyes in the 11 unilateral cases.Results Significant degeneration of the pRNFL was observed in the affected sector of the BRVO eyes (P < 0.01 versus reference sector and versus fellow eye). In contrast, mRNFL and GCIPL thickness showed no difference between affected and reference regions and no correlation with pRNFL thickness. Degenerative microcystic macular edema (MME) was present in 25% of the eyes with macular edema following BRVO.Conclusion Axonal degeneration occurs in pRNFL, which suggests that anterograde degeneration is the mechanism of RGC affection in BRVO. Our results emphasized the importance of pRNFL monitoring in BRVO treatment, and considering degenerative MME in persistent edema following BRVO.
Information System Security of Indonesia Terrestrial Border Control
Authors: Tjiptabudi Fransiskus Mario Hartono , Bernardino Raul
Published: November 2019

Today, Information Technology (IT) becomes an integral part of human life. IT boosts every sector, such as infrastructure, economics, agriculture, social, organization, and politics. The institutional systems are developed according to the specific business requirements, processes, flows, and security. Pos Lintas Batas Negara ‘integrated cross-border post’ (PLBN) is a designated authority consisting of the Custom, Immigration, and Quarantine (CIQ). Each section has a different Standard Operation Procedure (SOP). This research aims to develop a secure information system based on Confidentiality, Integrity, and Availability (CIA) concepts. The CIA is embedded in the ISO 27001 and McCumber Cube approach. The research focuses on the Secure Immigration Information System (SIIS). This research is conducted in the Wini immigration office. The researchers observe the immigration activities on the location, interview the immigration officers, and collect information. The researchers produce an effective, efficient, and security application prototype system.
Diseases Classification for Tea Plant Using Concatenated Convolution Neural Network
Authors: Krisnandi Dikdik , Pardede Hilman F. , Yuwana R. Sandra , Zilvan Vicky , Heryana Ana , Fauziah Fani , Rahadi Vitria Puspitasari
Published: November 2019

Plant diseases can cause a significant decrease in tea crop production. Early disease detection can help to minimize the loss. For tea plants, experts can identify the diseases by visual inspection on the leaves. However, providing experts to deal with disease identification may be very costly. The machine learning technology can be implemented to provide automatic plant disease detection. Currently, deep learning is state-of-the-art for object identification in computer vision. In this study, the researchers propose the Convolutional Neural Network (CNN) for tea disease detections. The researchers focus on the implementation of concatenated CNN, namely GoogleNet, Xception, and Inception-ResNet-v2, for this task. About 4727 images of tea leaves are collected, comprising of three types of diseases that commonly occur in Indonesia and a healthy class. The experimental results confirm the effectiveness of concatenated CNN for tea disease detections. The accuracy of 89.64% is achieved.
Therapeutic Potential of Medicinal Plant Proteins: Present Status and Future Perspectives
Authors: Wani Snober Shabeer , Dar Parvaiz A. , Zargar Sajad M. , Dar Tanveer A.
Published: November 2019

Biologically active molecules obtained from plant sources, mostly including secondary metabolites, have been considered to be of immense value with respect to the treatment of various human diseases. However, some inevitable limitations associated with these secondary metabolites like high cytotoxicity, low bioavailability, poor absorption, low abundance, improper metabolism, etc., have forced the scientific community to explore medicinal plants for alternate biologically active molecules. In this context, therapeutically active proteins/peptides from medicinal plants have been promoted as a promising therapeutic intervention for various human diseases. A large number of proteins isolated from the medicinal plants have been shown to exhibit anti-microbial, anti-oxidant, anti-HIV, anticancerous, ribosome-inactivating and neuro-modulatory activities. Moreover, with advanced technological developments in the medicinal plant research, medicinal plant proteins such as Bowman-Birk protease inhibitor and Mistletoe Lectin-I are presently under clinical trials against prostate cancer, oral carcinomas and malignant melanoma. Despite these developments and proteins being potential drug candidates, to date, not a single systematic review article has documented the therapeutical potential of the available biologically active medicinal plant proteome. The present article was therefore designed to describe the current status of the therapeutically active medicinal plant proteins/peptides vis-à-vis their potential as future protein-based drugs for various human diseases. Future insights in this direction have also been highlighted.
Antifungal Proteins from Plant Latex
Authors: Barbosa Mayck Silva , da Silva Souza Bruna , Silva Sales Ana Clara , de Sousa Jhoana D’arc Lopes , da Silva Francisca Dayane Soares , Araújo Mendes Maria Gabriela , da Costa Káritta Raquel Lustoza , de Oliveira Taiane Maria , Daboit Tatiane Caroline , de Oliveira Jefferson Soares
Published: November 2019

Latex, a milky fluid found in several plants, is widely used for many purposes, and its proteins
have been investigated by researchers. Many studies have shown that latex produced by some
plant species is a natural source of biologically active compounds, and many of the hydrolytic enzymes
are related to health benefits. Research on the characterization and industrial and pharmaceutical utility
of latex has progressed in recent years. Latex proteins are associated with plants’ defense mechanisms,
against attacks by fungi. In this respect, there are several biotechnological applications of antifungal
proteins. Some findings reveal that antifungal proteins inhibit fungi by interrupting the synthesis of
fungal cell walls or rupturing the membrane. Moreover, both phytopathogenic and clinical fungal
strains are susceptible to latex proteins. The present review describes some important features of proteins
isolated from plant latex which presented in vitro antifungal activities: protein classification,
function, molecular weight, isoelectric point, as well as the fungal species that are inhibited by them.
We also discuss their mechanisms of action.
Experimental Study on the Specific Heat Capacity Measurement of Water- Based Al2O3-Cu Hybrid Nanofluid by using Differential Thermal Analysis Method
Authors: Çolak Andaç Batur , Yıldız Oğuzhan , Bayrak Mustafa , Celen Ali , Dalkılıç Ahmet Selim , Wongwises Somchai
Published: November 2019

Background:

Researchers working in the field of nanofluid have done many studies on
the thermophysical properties of nanofluids. Among these studies, the number of studies on specific
heat is rather limited. In the study of the heat transfer performance of nanofluids, it is essential to
raise the number of specific heat studies, whose subject is one of the important thermophysical properties.

Objective:

The authors aimed to measure the specific heat values of Al2O3/water, Cu/water nanofluids
and Al2O3-Cu/water hybrid nanofluids using the DTA procedure, and compare the results with
those frequently used in the literature. In addition, this study focuses on the effect of temperature and
volume concentration on specific heat.

Methods:

The two-step method was tried to have nanofluids. The pure water selected as the base
fluid was mixed with the Al2O3 and Cu nanoparticles and Arabic Gum as the surfactant, firstly mixed
in the magnetic stirrer for half an hour. It was then homogenized for 6 hours in the ultrasonic homogenizer.

Results:

After the experiments, the specific heat of nanofluids and hybrid nanofluid were compared
and the temperature and volume concentration of specific heat were investigated. Then, the experimental
results obtained for all three fluids were compared with the two frequently used correlations
in the literature.

Conclusion:

Specific heat capacity increased with increasing temperature, and decreased with increasing
volume concentration for three tested nanofluids. Cu/water has the lowest specific heat capacity
among all tested fluids. Experimental specific heat capacity measurement results are compared
by using the models developed by Pak and Cho and Xuan and Roetzel. According to experimental
results, these correlations can predict experimental results within the range of ±1%.
Ethyl Acetate and Aqueous Fractions of Ziziphus jujuba Prevent Acute Hypertension Induced by Angiotensin II in Rats
Authors: Kamkar-Del Yasamin , Mohebbati Reza , Hosseini Mahmoud , Khajavirad Abolfazl , Shafei Mohammad N. , Rakhshandeh Hassan
Published: November 2019

Background:

The effect of hydroalcoholic extract of Ziziphus jujuba (ZJ) on hypertension has been reported previously.

Objective:

This experiment investigates the effect of two ethyl acetate (EA, a polar and semi-polar compound) and aqueous fractions (AQ, a polar compound) of ZJ extract on cardiovascular parameters in acute hypertension induced by angiotensin II (AngII).

Methods:

Rats were randomly divided into following groups (n=7 in each group): 1) Control; 2) AngII (50 ng/kg); 3) Losartan (LOS, 30 mg/kg) + AngII; 4, 5) ethyl acetate fraction (EA150 and EA300 mg/kg) + AngII and 6, 7) aqueous fraction (AQ150 and AQ300 mg/kg) + AngII. Rats were treated with both fractions and LOS orally for four weeks and in the experiment day (28th) AngII intravenously injected and cardiovascular parameters (Systolic Blood Pressure (SBP), Mean Arterial Pressure (MAP) and Heart Rate (HR)) directly were recorded by a power lab system.

Results:

AngII could significantly increase SBP and MAP (P<0.001) and decrease HR with respect to the control and these responses were attenuated by LOS. The SBP and MAP in both doses of EA+ AngII and the higher dose of AQ fractions + AngII were significantly lower than the AngII group (P<0.05 to P<0.001). Bradycardia induced by AngII was also reduced by LOS and both fractions. The comparison of two fractions also showed that the effect of EA fraction is greater than the AQ.

Conclusion:

This study indicates that both fractions of the ZJ extract have a beneficial effect on hypertension. Because effect of EA was greater than AQ, we suggested that antihypertensive effects of ZJ mediated polar and nonpolar compounds.
Mathematical model experimental verification for non-invasive method of glucose concentration in blood determination
Authors: Shapovalov V. V. , Gurevich B. S. , Dudnikov S. Yu. , Zagorsky I. G. , Belyaev A. V.
Published: November 2019

The mathematical model of the device which provides performance of the non-invasive measurements of glucose concentration in blood has been created. The model includes composition and solution of the system (or the set of systems) of linear equations in which the concentrations of different absorbing components are variables. This model has some problems from the point of view of the equation system solution convergence, and it was necessary to perform some experiments for the model verification. The present paper is devoted to the experiments performance methods and results for the mentioned mathematical model verification. The study allowed us to determine the working wavelengths in the spectral ranges that are optimal for measuring the concentration of glucose in the blood, and to establish the correlation of the measured and calculated values according to the developed mathematical model.
Slurry surfacing: a review of definitions, descriptions and current practices
Authors: Grilli Andrea , Graziani Andrea , Carter Alan , Sangiorgi Cesare , Pivoto Specht Luciano , Copetti Callai Sergio
Published: November 2019

Cold bitumen emulsions (CBE) are currently used worldwide for both non-structural (cold surface treatments) and structural (cold bituminous mixtures) paving applications. Among non-structural applications, bituminous slurry surfacings (BSS) allow to improve surface properties and extend the pavement’s life. However, selection of constituents, mix design, application and quality control procedures for BSS are mostly based on local experience and empirical tests. Thus, the use of BSS is associated to higher technical risks with respect to the use of traditional hot-mix technologies.
In this context the RILEM Technical Committee 280-CBE TG2 “Multiphase characterisation of cold bitumen emulsion materials” aims to collect worldwide theoretical knowledge and experiences on BSS and to inspire new standards, specifications and guidelines encompassing the wide set of existing practices. This paper summarizes the first part of the literature review carried out as part of the TC workplan and focuses on the definition, the description and the application method for BSS. National standards, construction specifications and best practice documents from North America, South America, Europe and Australia are analysed and compared.
Вырожденная структура двойников превращения и оценка плотности дислокаций мартенситных кристаллов
Authors: Кащенко М.П. , Кащенко Н.М. , Чащина В.Г.
Published: November 2019

Abstract In the dynamic theory of martensitic transformations, the wave mechanism of controlling martensite crystal growth is determined by the superposition of wave beams of quasi-longitudinal (or longitudinal) waves carrying the “tensile–compression” deformation in the orthogonal directions. The wave beam formation is considered to be a result of the formation of excited (vibrational) states. The existence of transformation twins is interpreted as a result of a matched propagation with respect to long-wave ( l waves) and short-wave ( s waves) shifts. The matching condition is analyzed for the γ–α martensitic transformation in iron-base alloys. It is shown for the first time that the transition to a degenerate twin structure with the allowance for the medium discreteness enables one to estimate the dislocation density in crystals with habit {557}, which agrees with that observed experimentally.
Метод управления полярностью слоев GaN при эпитаксиальном синтезе GaN/AlN гетероструктур на гибридных подложках SiC/Si
Authors: Мизеров А.М. , Кукушкин С.А. , Шарофидинов Ш.Ш. , Осипов А.В. , Тимошнев С.Н. , Шубина К.Ю. , Березовская Т.Н. , Мохов Д.В. , Буравлев А.Д.
Published: November 2019

The effect of GaN polarity inversion from N- to Ga-face during the successive growth of GaN layers by plasma assisted molecular beam epitaxy and halide vapor phase epitaxy on hybrid SiC/Si(111) substrates was found. A new method of the formation of crack-free Ga-face GaN/AlN heterostructures on hybrid SiC/Si(111) substrates has been developed. In this method the two stage growth of GaN layers is used. At the first stage, the N-face GaN transition layer was grown on the SiC/Si(111) surface by plasma assisted molecular beam epitaxy. At the second stage, the AlN interlayer was first grown by halide vapor phase epitaxy on N-face GaN transition layer. After that the Ga-face GaN layer was synthesized by halide vapor phase epitaxy atop of the AlN interlayer. Also it was found that etching in a KOH solution affects only the N-face GaN transition layer and leads to its complete removal, which result in complete separation of the main Ga-face GaN layer from the SiC/Si(111) substrate. The method allows you to grow free from cracks and unstressed thick layers of GaN, and transfer them to the foreign substrates.
Новый метод получения объемных кристаллов AlN, GaN и AlGaN с использованием гибридных подложек SiC/Si
Authors: Кукушкин С.А. , Шарофидинов Ш.Ш.
Published: November 2019

The paper presents the main provisions of the new method of growing bulk, with a thickness of 100 μm or more, single-crystal AlN, AlGaN and GaN films on silicon poles with a silicon carbide buffer layer with their subsequent separation from the Si substrate. The main essence of this method is the combination of the method of chloride-hydride epitaxy, which ensures high growth rates of III-nitride layers using as substrate for growth, Si substrate with a buffer layer of a nanoscale atomic SiC film. The Si substrate with a SiC layer grown by the substitution method has a number of structural, physical, and chemical features as compared to SiC layers grown on Si by standard methods. It is shown that it is this feature that makes it possible to grow on its surface thick, uncracked layers of AlN, AlGaN and GaN, followed by their simple separation from the substrate. In this work, single-crystal uncracked layers were grown: AlN up to 300 microns thick; AlGaN thickness up to 400 microns; GaN thickness up to 200 microns; GaN semipolar (112 ̅4) orientation up to 35 microns.
Кварцевое стекло, полученное на плазмотронах ОАО "Динур" из раменского песка: особенности кристаллизации на полированной поверхности
Authors: Колобов А.Ю. , Сычева Г.А.
Published: November 2019

Abstract. The raw material for melting quartz glass at JSC "DINUR" is quartz sand produced by Ramenskoye mining and processing plant (GOK). The performance of reactors (plasmatrons) and the quality of the ingots obtained significantly depend on the quality of Sands (the content of impurity components such as aluminum and iron oxides). It is established that the product of melting quartz sand from the feedstock with a high content of impurities is characterized by reduced resistance to crystallization.
Образование тонких пленок и малоразмерных монокристаллов из газовой фазы на поверхностях ионных кристаллов в условиях нагрева и электрического поля
Authors: Карыев Л.Г. , Федоров В.А. , Чиванов А.В.
Published: November 2019

The work investigated the behavior of surfaces of ionic crystals of different crystallographic orientation and surface of the chip in terms of heat and electric field. Changes on the surfaces of the samples are manifested in the form of formation of a viscous liquid or small-sized single crystals. On the surfaces of crystals, a charge is formed as a result of depletion or saturation of the near-surface layers of the crystal with positive ions, which leads to a stoichiometric change in the substance of the crystal. Single crystals are formed from ion gas, the appearance of which is initiated by sublimation of matrix ions from the surface of the chip.
Морфология поверхности, микроструктура и пьезоэлектрический отклик перовскитовых островков в тонких пленках цирконата-титаната свинца
Authors: Пронин И.П. , Каптелов Е.Ю. , Сенкевич С.В. , Киселев Д.А. , Осипов В.В. , Пронин В.П.
Published: November 2019

The features of the microstructure and piezoelectric response of perovskite islands in the matrix of the pyrochloric phase in thin lead zirconate titanate films formed by the method of radio-frequency magnetron sputtering are investigated. The radial heterogeneity of the surface morphology of the islands and the piezoelectric response is revealed. The role of two-dimensional mechanical stresses acting on a thin film from the side of the silicon substrate is discussed.
Влияние ориентации кремниевой подложки с буферным подслоем карбида кремния на диэлектрические и полярные свойства пленок нитрида алюминия
Authors: Сергеева О.Н. , Солнышкин А.В. , Киселев Д.А. , Ильина Т.С. , Кукушкин С.А. , Шарофидинов Ш.Ш. , Каптелов Е.Ю. , Пронин И.П.
Published: November 2019

The dielectric and polar properties of thin films of aluminum nitride (AlN) epitaxially grown on variously oriented p-type silicon substrates with a buffer sublayer of silicon carbide (SiC), as well as on vicinal planes, are studied. According to the results of studies of the polar properties by two independent methods — the dynamic pyroelectric effect and piezoelectric force microscopy, it was shown that the use of a SiC buffer layer significantly improves the polar properties of thin layers of aluminum nitride.
Теплопроводность монокристаллов твердых растворов на основе ZrO-=SUB=-2-=/SUB=-, солегированных оксидами скандия, церия и иттрия
Authors: Борик М.А. , Кулебякин А.В. , Курицына И.Е. , Ломонова Е.Е. , Мызина В.А. , Попов П.А. , Милович Ф.О. , Табачкова Н.Ю.
Published: November 2019

Abstract The thermal conductivity of single-crystal solid solutions (ZrO_2)_1 – _ x  _– _ y  _– _ z (Sc_2O_3)_ x (CeO_2)_ y (Y_2O_3)_ z ( x = 0.08–0.10; y = 0.005–0.01; z = 0–0.005) was measured in the temperature range 50–300 K. Phase composition and defective structure of crystals were studied.
Некоторые свойства монокристалла NiCl-=SUB=-2-=/SUB=-·6H-=SUB=-2-=/SUB=-O
Authors: Зайнуллин О.Б. , Волошин А.Э. , Коморников В.А. , Маноменова В.Л. , Руднева Е.Б. , Тимаков И.С. , Ковалев С.И.
Published: November 2019

A single crystal of nickel chloride hexahydrate was obtained by isothermal evaporation from an aqueous saturated solution. The transmission spectrum parameters and the thermal stability of the sample were studied.
Влияние упругих напряжений на формирование осевых гетеропереходов в трехкомпонентных нитевидных нанокристаллах A-=SUP=-III-=/SUP=-B-=SUP=-V-=/SUP=-
Authors: Корякин А.А. , Лещенко Е.Д. , Дубровский В.Г.
Published: November 2019

The influence of elastic stresses on the formation of axial heterojunctions in ternary III-V nanowires was theoretically investigated. The composition profiles of InAs/GaAs axial heterojunction in self-catalyzed GaxIn1-xAs nanowires were obtained. It was shown that the InAs/GaAs heterojunction width amounts to tens of monolayers and increases with the increase of the nanowire radius due to elastic stresses. The elastic stress relaxation on nanowire sidewalls does not lead to the presence of miscibility gap in GaxIn1-xAs system at typical growth temperature (about 450ºC) and nanowire radius above 5 nm.
Кристаллизация слоев в гетероструктурах PZT/LNO/Si
Authors: Атанова А.В. , Жигалина О.М. , Хмеленин Д.Н. , Серегин Д.С. , Воротилов К.А.
Published: November 2019

The microstructure of the layers of the Pb(Zr0.52Ti0.48)O3–LaNiO3–Si composition and LaNiO3 thin films obtained by chemical solution deposition was studied using transmission electron microscopy. It was revealed that the polycrystalline, porous structure of LaNiO3 leads to a breakdown of the columnar structure of the lead zirconate titanate. The effect of heat treatment on the structure and phase composition of lanthanum nickelate is considered. It is shown that such morphological features of the structure of the LaNiO3 film, such as foliation, porosity and disorientation, are observed during annealing at T = 550 ° C and aggravated when the temperature rises to T = 800 ° C.
The sample structure study was financially supported by the Ministry of Science and Higher Education within the State assignment FSRC “Crystallography and Photonics” RAS. This work was performed using the equipment of the Shared Research Center FSRC “Crystallography and Photonics” RAS and was supported by the Russian Ministry of Education and Science. Heterostructures were synthesized in Federal State Budgetary Institution of Higher Education "MIREA - Russian Technological University" with partial support from the RFBR grant 19-29-03058.
XXIII Международный симпозиум Нанофизика и наноэлектроника", Нижний Новгород, 11-14 марта 2019 г. Сравнительное исследование полимерных наночастиц на основе смесей поликапролактона и поливинилового спирта с инкапсулированным противоопухолевым препаратом методами атомно-силовой микроскопии, рентгеновской дифракции и динамического рассеяния света
Authors: Суханова Т.Е. , Вылегжанина М.Э. , Волков А.Я. , Гасилова E.Р. , Кутин А.А. , Samy Moshera , Abdallah Heba M. , Ayoub Magdy M.H.
Published: November 2019

Using the methods of atomic force microscopy, optical microscopy, X-ray diffraction analysis, dynamic and static light scattering, we studied the morphology, structure, and optical properties of compositions based on biodegradable polymer nanoparticles prepared from mixtures of polycaprolactone and a stabilizer - polyvinyl alcohol containing the antitumor preparation 5-fluorouracil. Studies have shown significant changes in the morphology of the resulting compositions depending on the stabilizer content. No crystalline reflections corresponding to 5-fluorouracil were found, which indicates a high degree of the drug dispersion in the polycaprolactone polymer matrix. Correlations between structural and morphological parameters, composition, stabilizer concentration and encapsulation efficiency of the 5-fluorouracil drug in the compositions have been established.
Разработка технологических принципов создания системы микрофокусных рентгеновских трубок на основе кремниевых автоэмиссионных нанокатодов
Authors: Дюжев Н.А. , Демин Г.Д. , Филиппов Н.А. , Евсиков И.Д. , Глаголев П.Ю. , Махиборода М.А. , Чхало Н.И. , Салащенко Н.Н. , Филиппов С.В. , Колосько А.Г. , Попов Е.О. , Беспалов B.A.
Published: November 2019

Abstract The technological prospects for the creation of a system of microfocus X-ray tubes with the use of silicon field emission of nanocathodes have been discussed. A numerical analysis of the field-emission current from a nanoscale semiconductor cathode regulated by voltage on a grid electrode has been carried out on the basis of which a scheme for controlling the elements of the matrix of field-emission cathode assemblies has been proposed. The current–voltage characteristics of silicon field emission nanocathodes have been measured. They are in good agreement with the theoretical estimates of the field-emission current. A full technological cycle of the development of elements of microfocus X-ray tubes (a set of field-emission cathode assemblies and a set of anode assemblies) has been performed. The results can be used to create systems of microfocus X-ray tubes for nanolithographic equipment of a new generation.
Механизмы отражения и преломления пучка заряженных частиц в рассеивающей среде
Authors: Куракин В.Г. , Куракин П.В.
Published: November 2019

The mathematical model describing the reflection and refracting phenomena at incline border of scattering medium and vacuum for a moving charged particle traversing this border is suggested. To build such a model, the distribution function for multiple Coulomb scattering processes in unbounded medium is used. Formulae for refraction angle and reflection coefficient are derived followed by
numerical calculations and appropriate plots.
Неразрушающий контроль поверхности, слоев и концентрации носителей заряда в подложках и структурах SiC
Authors: Марков А.В. , Панов М.Ф. , Растегаев В.П. , Севостьянов Е.Н. , Трушлякова В.В.
Published: November 2019

Abstract Silicon carbide substrates and epitaxial structures are investigated by nondestructive contactless methods. Parameters of the disrupted surface layer and roughnesses are determined using ellipsometry and atomic force microscopy. The free charge carrier concentration is determined by IR spectroscopy. The thicknesses in the multilayer epitaxial structure on SiC are determined using IR spectroscopy and scanning electron microscopy.
Анализ проникающей способности стержневых ударников из пористых материалов
Authors: Толкачев В.Ф. , Зелепугин С.А.
Published: November 2019

An axisymmetric high-velocity impact of metal targets with porous rode projectiles was experimentally and numerically studied. The study demonstrates a significant effect of the porosity of a projectile on the penetration process. The penetration depth of porous rode projectiles increases at ultrahigh impact velocities compared to monolithic projectiles with equal masses and diameters. This effect is associated with the accelerated formation of localized shear bands followed by fragmentation of the material. One of the possible approaches to evaluate the penetration depth can be the proposed approximate (engineering) method that considers the dynamic strength characteristics of interacting bodies. The calculations performed by the proposed method are in good qualitative and quantitative agreement with experimental data.
Влияние науглероживания вольфрама на активацию газа при синтезе алмазных структур
Authors: Емельянов А.А. , Плотников М.Ю. , Юдин И.Б.
Published: November 2019

In order to develop a gas-jet method of diamond structures deposition, the flow of hydrogen and methane mixture through heated tungsten coaxial cylindrical channels with a built-in tungsten spiral is studied. The main attention is paid to the study of the carburization of tungsten surfaces during gas-jet deposition and the effect of carburization on the deposition rate and the morphology of the deposited coatings. A series of experiments to study the carburization of tungsten surfaces under different conditions for feeding a mixture of hydrogen and methane is performed. The flow parameters are investigated by the direct simulation Monte Carlo method.
The possible ways of delivering methane and its fragments onto the surface of the spiral are determined.
Эффекты, связанные с ограниченной геометрией, в нанокомпозитах на основе мезопористых матриц 2D-SBA-15 и 3D-SBA-15, содержащих наночастицы нитрита натрия
Authors: Набережнов А.А. , Стукова Е.В. , Алексеева О.А. , Новикова С.А. , Franz A.
Published: November 2019

The temperature dependences of the ferroelectric order parameter for nanostructured sodium nitrite on heating and cooling have been obtained from the analysis of the temperature evolution of diffraction spectra of neutron scattering on nanocomposites, produced by embedding of sodium nitrite into the pores of the mesoporous matrices 2D-SBA-15 (average pore diameter 69 (4) Å) and 3D-SBA-15 (average pore diameter 94 (5) Å ). It is shown that on heating the phase transition from the ferroelectric phase to the paraelectric one occurs at TC = 433 ± 1 K for both nanocomposite materials. The sizes of nanoparticles in both nanocomposites are determined and it is established that their size decreases on heating at approaching to the ferroelectric phase transition temperature. Temperature hysteresis (~ 15–20 K) have been found in the temperature dependence of the order parameter between heating and cooling regimes.
Лидарное зондирование смеси молекул сероводорода и метана в атмосфере с летающей платформы
Authors: Привалов В.Е. , Шеманин В.Г.
Published: November 2019

The back scattering Raman lidar equation for the gas mixture of the hydrogen sulfide and the methane molecules numerical solution results are presented at the hydrogen sulfide and methane molecules remote sensing in the atmospheric boundary layer with the concentration in the range of 1010 cm-3 … 1016 cm-3 from the flying platform at the heights up to 500 m in the synchronous photon counting lidar mode.
It has been shown that the studied hydrogen sulfide molecules concentration at the level of 1,4 1011 cm-3 can be registered during measurement time duration of 10 s and the methane molecules concentration of 7,6 1015 cm-3 - during measurement time of 1 ms for such a lidar variant at the 405 nm laser radiation wavelength and the platform flight altitude up to 500 m.
Визуализация двух видов свечения в акустическом поле в жидкости
Authors: Шарипов Г.Л. , Абдрахманов А.М. , Гареев Б.М.
Published: November 2019

Photographs and spectra of a single-bubble sonoluminescence of a moving bubble in pure water and Ru(bpy)32+ aqueous solutions were obtained. For solutions of the ruthenium complex, the presence of luminescence zones located outside the line of the main trajectory of the glowing bubble characteristic of pure water is shown. The observed spatial localization of these zones confirms the conditionality of their appearance, as was previously shown by the authors, by sonochemiluminescence of the ruthenium complex in the volume of the solution, secondary to the primary sonoluminescence of the bubble itself.
Малогабаритный криотермостат с хладагентом из твердого диоксида углерода
Authors: Деветьяров Д.Р. , Ероньян М.А. , Ломасов В.Н. , Опалихин А.Ф. , Скупов Ю.А. , Соболь Б.А. , Унтилов А.А.
Published: November 2019

A simple design of a small cryothermostat is proposed to study the effect of gamma irradiation on optical losses of single-mode fluorosilicate light guides at a wavelength of 1.31 µm. An increase in their radiation resistance with a decrease in the test temperature from + 25 to minus 60 °C was found.
Ионно-лучевое осаждение тонких пленок AlN на Al-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=-
Authors: Лунин Л.С. , Девицкий О.В. , Сысоев И.А. , Пащенко А.С. , Касьянов И.В. , Никулин Д.А. , Ирха В.А.
Published: November 2019

Thin AlN films were obtained by the ion-beam deposition method on sapphire substrates. Studies were carried out using scanning electron microscopy, Raman scattering and optical spectroscopy. Dependences of influence of the ion-beam deposition parameters (composition of gas mixture, energy of the ion beam) on morphology, structure and optical properties of the AlN films on sapphire were revealed.
Генерация терагерцевого излучения с поверхности монослойного WSe-=SUB=-2-=/SUB=-
Authors: Горбатова А.В. , Хусяинов Д.И. , Буряков А.М.
Published: November 2019

The parameters of the generated terahertz radiation in a two-dimensional WSe2 film grown by chemical vapor deposition were investigated for the first time. The main mechanism of the generated terahertz radiation in the studied sample was determined. The terahertz amplitude dependence on azimuthal angle in the two-dimensional WSe2 film was studied. The distribution of the laser pump electric field in the WSe2 / SiO2 / Si structure was calculated as a function of the silicon dioxide thickness. The choice of the optimal structural geometry for the effective generation of terahertz radiation by a monolayer WSe2 was theoretically justified
Влияние полярности напряжения питания на режим горения тлеющего разряда атмосферного давления в потоках атомарных и молекулярных газов
Authors: Астафьев А.М. , Степанова О.М. , Пинчук М.Э.
Published: November 2019

Electrical characteristics of a glow discharge of atmospheric pressure with a constant current of up to 40 mA in atomic and molecular gas flows with a volume flow from 0.5 to 5 l/min were measured. It was found that in the flow of molecular gases the voltage drop on the discharge significantly depends not only on the rate of gas blowing, but also on the polarity of the supply voltage. With increasing of the blowing rate the discharge in oxygen and nitrogen becomes unstable, and the voltage on the discharge gap increases by several hundred volts. With a positive polarity of the supply voltage both effects are much more pronounced than with a negative one. In helium and argon flows with given blowing rates the polarity of the voltage on the electrodes does not affect on the discharge mode.
AUDIT INFRASTRUKTUR TEKNOLOGI INFORMASI BERBASIS ITIL V.3 DOMAIN SERVICE DESIGN I PADA SIPMAS DI LPPM IT TELKOM PURWOKERTO
Authors: Hidayah Lidiya Nur , Puspitaningrum Apriliana , Febianti Tika , Oktavfiantika Namira Nur , Nurdin Amal Lia , Ayuningtyas Belinda Sekar , Fathushahib Fathushahib
Published: November 2019

Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LPPM) adalah payung institusi bagi Pusat Penelitian (Puslit) dan Pusat Pengabdian kepada Masyarakat (PPM). Sebagai lembaga yang menaungi Puslit dan PPM maka LPPM mengemban tugas serta mengorganisasi pelaksanaan penelitian dan pengabdian masyarakat. Disamping itu LPPM juga bergerak dalam lingkup pengembangan manajemen data dan informasi bagi pimpinan Institut dalam membuat keputusan-keputusan kelembagaan. Pada LPPM IT Telkom Purwokerto memiliki suatu Sistem Informasi Pengaduan Masyarakat (SIPMAS).
Sistem Informasi Pengaduan Masyarakat (SIPMAS) adalah sistem informasi yang mengelola pengaduan masyarakat pada lembaga pelayanan pengabdian masyarakat di IT Telkom Purwokerto. SIPMAS sebagai salah satu sarana pelayanan civitas akademika harus memiliki tingkat kematangan yang tinggi. Namun pada sistem ini masih memiliki beberapa kekurangan dalam memberikan pelayan. Untuk menganalisis permasalahan tersebut kita dapat mengukur kematangan tersebut dengan melakukan proses audit. Standar yang banyak digunakan oleh organisasi bertaraf internasional sebagai framework proses audit adalah Standar Information Technology Infrastructure Library (ITIL) V.3. Penelitian ini, melakukan audit Sistem Informasi Pengabdian Masyarakat (SIPMAS), dari sisi Infrastruktur dengan domain service design. Proses penilaiannya, dilakukan dengan menggunakan service maturity framework. Hasil pengukuran nilai kematangan pada SIPMAS di LPPM IT Telkom Purwokerto secara keseluruhan berada pada level 3 yaitu defined.
ANALISIS KEPUASAN MAHASISWA TERHADAP KINERJA PORTAL UNIVERSITAS ALMA ATA MENGGUNAKAN PENDEKATAN END-USER COMPUTING SATISFACTION DAN DELONE AND MCLANE MODEL
Authors: Ratnasari Asti
Published: November 2019

Kepuasan pengguna merupakan salah satu aspek untuk mengevaluasi sistem informasi. Sistem informasi dikatakan baik, jika pengguna merasa puas terhadap sistem informasi yang diterapkan dalam suatu organisasi. End User Computing Satisfaction dan Delone and McLean Model of Information Systems, keduanya merupakan model evaluasi sistem informasi untuk mengetahui kepuasan pengguna. Penelitian ini bertujuan untuk mengetahui faktor-faktor yang mempengaruhi kepuasan pengguna terhadap kinerja Portal UAA (konten, akurasi, format, kemudahan penggunaan, ketepatan waktu, kualitas informasi, kualitas sistem dan kualitas layanan). Lebih lanjut, penelitian ini juga memodelkan kepuasan pengguna baru dengan memodifikasi End User Computing Satisfaction dan Delone and McLean Model of Information Systems. Analisis data yang digunakan untuk pengolahan data adalah analisis regresi berganda. Analisis regresi berganda digunakan untuk mengetahui pengaruh antar variabel independen terhadap variabel dependen.
SISTEM INFORMASI MANAJEMEN ASET SEKOLAH BERBASIS WEB
Authors: Hoiriyah . , Andriyanto .
Published: November 2019

Adanya sarana dan prasarana merupakan penunjang kegiatan administrasi dan pembelajaran di sebuah lembaga pendidikan. Sarana dan prasarana sangat penting untuk menunjang proses kegiatan belajar mengajar serta meningkatkan rating sebuah lembaga pendidikan. SDN Bicorong 1 merupakan salah satu SD yang memiliki aset berupa aset bangunan, tanah dan juga benda-benda seperti peralatan untuk kegiatan belajar mengajar. Manajemen penataan aset pada SDN Bicorong 1 masih konvensional sehingga data-data aset tersebut rentan rusak bahkan hilang. Adanya kekeliruan dalam proses pencatatan serta pengelolaan aset akan mengakibatkan meningkatnya biaya operasional pengadaan aset. Oleh sebab itu Sistem Informasi Manajemen Aset Sekolah dibangun untuk mengelola dan menyimpan data-data aset sekolah. Hasil yang diperoleh dalam pembuatan aplikasi ini adalah user dapat melakukan pencatatan penerimaan materiil, pencatatan pengolaan  materiil serta melaporkan seluruh data aset maupun penyusutan aset bergerak yang ada.
Pola konsumsi minuman es dan kepedulian terhadap keamanan pangan di Kota Bogor
Authors: Rahayu Winiati Pudji , Nurjanah Siti , Gita Sophia Ekaristi Dharma
Published: November 2019

Consumption pattern of iced beverages of the consumer in Bogor and their awareness of food safetyBackground: Iced beverage will be potentially contaminated by microbes if it is prepared and handled by a lack of sanitary and hygiene. The level of risk depends on exposure affected by the prevalence and concentration of microorganisms, also the consumption patterns.Objective: The objective of this study was to determine the iced beverages consumption number in Bogor using a semi-quantitative food frequency questionnaire (SQ-FFQ) and to know the level of knowledge and awareness of food safety.Method: The survey used 300 respondents, including males and females, which classified in three groups of age and three groups of income level also the final level of education.Results: Most of the respondents were frequently consumed flavored iced beverages (52%) compared to other types of iced beverages and the average number of daily consumption was 182 mL/person. Based on compare means analysis, the amount of iced beverages consumption was not affected by age and gender but was influenced by income. The level of knowledge and awareness of food safety of consumers in Bogor was good (>80%). Based on Chi-Square analysis, the level of knowledge and awareness of consumers were not affected by age, gender, or final education. However, when viewed from the percentage of correct answers, the main factor of the level of knowledge and awareness of consumers was the final level of education.Conclusion: The amount of iced beverages consumption was not affected by age and gender but influenced by income, and the average consumption was 135 mL/person/day. The level of knowledge and awareness of food safety of consumers in Bogor was good (>80%).
En desplazamiento forzado: desde Banavil, Tenejapa, hacia San Cristóbal de Las Casas
Authors: Pecker Madeo Carolina
Published: November 2019

A partir del abordaje etnográfico, en este artículo presento una situación particular de movilidad forzada en los Altos de Chiapas: el desplazamiento de un grupo de indígenas tseltales desde su comunidad en Banavil, municipio de Tenejapa, hacia la ciudad de San Cristóbal de Las Casas por motivos de violencia política. Basándome en el trabajo de campo realizado en los años 2015 y 2018 en la ciudad, propongo analizar el desplazamiento forzado como un proceso de desterritorialización / territorialización precaria, cuyas particularidades caracterizo en vinculación con los sentidos de los propios desplazados acerca de los territorios y las experiencias de violencia, así como con sus identificaciones, objetivos y relaciones con organizaciones en la ciudad.
25 Years of UNCRC: Lessons Learned in Children's Participation
Authors: Lansdown Gerison
Published: November 2019

No Abstract Available
Ask Them: Child Participation in the Development of Educational Services
Authors: Finelli Manuel , Rocca Claudia , Marchesi Valentina , Maggi Stefania
Published: November 2019

In accordance with Article 12 of the United Nations Convention on the Right of the Child (UNCRC), we conducted a consultation process with 113 children between four and seven years of age from five different schools in Italy. We asked children to imagine their ideal school in guided conversations, drawings, and drawing descriptions. Their responses were organised into three thematic areas: (a) school quality, (b) purposes of early childhood education, and (c) activities to include in the school curriculum.  Consistent with literature on participatory research, this six-month consultation process demonstrates that even young children’s views can be useful to policy-making. Particular attention is given to the methodology.
La Détention Des Mineurs Étrangers Non Accompagnés Dans Le Contexte De L’immigration
Authors: HADDAD Mouna
Published: November 2019

Dans plusieurs pays à travers le monde certaines autorités gouvernementales arrêtent des mineurs étrangers non accompagnés et les détiennent dans des centres fermés. En général leur détention n’est pas relative à une infraction pénale, mais au manque de documents règlementaires requis qui rendraient possible leur entrée légale dans le pays. Il est particulièrement important que les États membres à la Convention relative aux droits de l’enfant reconnaissent aux mineurs étrangers non accompagnés le droit d’être traités avec humanité et avec respect de leur qualité d’enfant, tout en tenant compte de leurs besoins spécifiques. Dans le présent article, nous exposons d’abord les faits d’une affaire célèbre survenue en Belgique concernant la détention d’une mineure étrangère non accompagnée, âgée de cinq ans à l’époque. On constate avec cette affaire que la problématique de la détention des mineurs étrangers non accompagnés est pertinente aussi dans d’autres pays que le Canada. Nous abordons ensuite la norme internationale sur la détention des enfants garantie dans la Convention relative aux droits de l’enfant, le but est d’examiner la conformité à cette norme des dispositions concernant la détention des mineurs contenues dans la Loi sur l’immigration et la protection des réfugiés du Canada. English:In many countries in the world certain governmental authorities arrest unaccompanied foreign minors and detain them in closed centres. Generally it is not because they have committed a criminal offence, but rather that they lack valid administrative papers allowing them to enter the country legally. It is particularly important that State Parties to the Convention on the Rights of the Child recognize that unaccompanied foreign minors have the right to be treated with humanity and as children with specific needs. In this article, we will first recount a famous Belgian case concerning the detention of an unaccompanied foreign minor who was five-years old at the time. This case will highlight that the problem of the detention of unaccompanied foreign minors is relevant to other countries beside Canada. We then explore the international standards with regard to children’s detention established by the Convention on the Rights of the Child. The objective is to examine whether the Canadian Immigration and Refugee Protection Act’s position on detention complies with this norm.
25th Anniversary of the CRC: An introduction to youth speakers
Authors: Pearson Landon
Published: November 2019

Landon Pearson introduces the four youth speakers from the 25th Anniversary of the CRC event held at Carleton University May 15 2014.