bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of a methodology for calculating and designing a single-phase asynchronous electric motor without external phase-shifting devices for ship automation systems using a mathematical model obtained using experimental planning methods
Authors: Каракаев А.Б. , Костенко А.В.
Published: December 2021

Статья посвящена разработке методики проектирования однофазного асинхронного электродвигателя без внешних фазосдвигающих устройств для систем судовой автоматики. Отмечается, что существующие на сегодняшний день известные методики расчёта микромашин не учитывает потерь в стали, что приводит к значительным погрешностям при расчёте двигателя. Авторами предлагается применять разработанную уточненную методику расчёта двигателя для дальнейшего его проектирования. Отмечается, что из выявленных в работе зависимостей важнейшей является зависимость пускового момента от электрического угла между осями обмоток 1 и 44 - α. Где выбор не оптимального электрического угла - крайне негативно сказывается на величине пускового момента однофазной микромашины. Для пояснения особенностей определения активной части двигателя авторами строится график зависимости наружной поверхности и потерь от полезной мощности. Также, в статье авторы приводят номограммы, позволяющие принимать проектировочные решения не только на основания расчёта, но и графоаналитическим методом. Результатом работы является получение новой методики расчёта и проектирования однофазной микромашины для систем судовой автоматики, используя для расчёт математическую модель, полученную с помощью методов планирования эксперимента.

The article is devoted to the development of a design technique for a single-phase asynchronous electric motor without external phase-shifting devices for ship automation systems. It is noted that the currently known methods for calculating micromachines do not take into account losses in steel, which leads to significant errors in calculating the engine. The authors propose to apply the developed refined methodology for calculating the engine for its further design. It is noted that of the dependences identified in the work, the most important is the dependence of the starting torque on the electric angle between the axes of the windings 1 and 44 - α. Where the choice of a non-optimal electrical angle has an extremely negative effect on the magnitude of the starting torque of a single-phase micromachine.
To clarify the features of determining the active part of the engine, the authors build a graph of the dependence of the outer surface and losses on the net power. Also, in the article, the authors provide nomograms that allow making design decisions not only on the basis of calculation, but also by the graphical analytical method.
The result of the work is to obtain a new methodology for calculating and designing a single-phase micromachine for ship automation systems, using for the calculation a mathematical model obtained using experimental planning methods.
Numerical analysis of a radial hybrid lobe bearing with gas lubrication
Authors: Куценко Н.В. , Грибиниченко М.В. , Нитяговский А.В. , Куренский А.В. , Портнова О.С.
Published: December 2021

В работе рассмотрены результаты численного исследования модели радиального гибридного подшипника с газовой смазкой. Установлено наличие оптимальных значений параметров, определяющих форму смазочного зазора, получены их значения и закономерности влияния на них различных характеристик подшипника. Рассмотрено распределение давления в смазочном слое при различном количестве секторов лепестков. Подтверждено предположение о наличии оптимальных значений параметров, определяющих форму смазочного зазора. И опровергнуто предположение о том, что оптимальные значения этих параметров будут зависеть от значений других параметров подшипника.
Выявлен положительный эффект от совместного воздействия газодинамического и газостатического эффектов. Относительно газостатических параметров – выявлен параметр, имеющий оптимальное значение (расстояние от выбранного торца подшипника до линии сетки, на которой располагаются питатели ряда с номером р), которое сохраняет постоянное значение.
На основе полученных результатов разработаны основы методики расчета и оптимизации радиальных гибридных подшипников с газовой смазкой, имеющих профилированную рабочую поверхность.

The paper considers the results of numerical study of gas-lubricated hybrid radial bearing model. The presence of optimal values of parameters determining the shape of the lubrication gap is established, their values and regularities of influence of different bearing characteristics on them are obtained. Pressure distribution in the lubricating layer at different number of lobe sectors has been considered. The assumption of optimum values of parameters determining the form of the lubrication gap is confirmed. And the assumption that the optimal values of these parameters will depend on the values of other bearing parameters is refuted.
The positive effect of the combined effect of gas-dynamic and gas-static effects has been revealed. Concerning gas-static parameters - the parameter which has optimum value (distance from the chosen end face of a bearing to a grid line on which feeders of a row with number p are located) which keeps constant value has been revealed.
On the basis of the obtained results the bases of calculation and optimization methodology of radial hybrid bearings with gas lubrication, having profiled working surface, are developed.
Efficiency of spatially recursive algorithms for transmitting images of marine vessels
Authors: Фахми Ш.С. , Шаталова Н.В. , Костикова Е.В. , Пышкина Н.Ю. , Васильев Ю.И.
Published: December 2021

На современном этапе развития интеллектуальных морских технологий необходимо включить в состав видеосистемы обработки изображений две подсистемы передачи видеоинформации морских сюжетов. Во первых на основе спектрального преобразования сигналов из пространственной области в частотную для оперативной доставки видеоинформации, полученной с различных камер подводного и надводного наблюдения. Во вторых, на основе пространственных методов обработки, без перехода в спектральную область сигнала для передачи выделенных ключевых точек объектов на изображениях. При этом важнейшая особенность этих подсистем заключается в улучшении информационных показателей качества морских видеосистем автоматизированной обработкой видеоинформации: точность визуальных данных, битовая скорость передачи по каналам связи и вычислительная сложность алгоритмов анализа и передачи видеоинформации. В предлагаемом исследовании приводятся алгоритмы спектральной и пространственной обработки видеоинформации, проведена оценка эффективности алгоритмов обработки изображений. А также отражены результаты моделирования алгоритмов и сравнительная оценка информационных показателей интеллектуальных морских видеосистем: точность, битовая скорость и вычислительная сложность видеосистем обработки морских изображений.

At the present stage of the development of intelligent marine technologies, it is necessary to include two subsystems for the transmission of video information of marine scenes in the video image processing system: 1) based on the spectral conversion of signals from the spatial domain to the frequency domain for the rapid delivery of video information obtained from various underwater and surface surveillance cameras; 2) based on spatial processing methods without switching to the spectral domain of the signal to transmit selected key points of objects in the images. At the same time, the most important feature of these subsystems is to improve the information quality indicators of marine video systems by automated processing of video information: the accuracy of visual data, the bit rate of transmission over communication channels and the computational complexity of algorithms for analyzing and transmitting video information. The proposed study provides algorithms for spectral and spatial processing of video information. The results of algorithm modeling and comparative evaluation of information indicators of intelligent marine video systems are also presented: accuracy, bit rate and computational complexity of marine image processing video systems.
Noise analysis in a model experiment for measuring ice loads using ice free water run
Authors: Резцова А.М. , Звягин П.Н.
Published: December 2021

Модельный эксперимент в ледовом бассейне позволяет выяснить ледовые качества проектируемого ледостойкого морского сооружения, в том числе – получить представление о возможных ледовых нагрузках путем измерений глобальных нагрузок многокомпонентным динамометром. Чувствительность применяемого оборудования приводит к появлению шумовых помех в измеренном сигнале, вызванных действиями людей, обслуживающих эксперимент, работой машин и механизмов, гидродинамическими эффектами, а также явлениями в электросети. Отделение шумовых помех от полезного сигнала на этапе обработки данных является важной задачей, успешное решение которой позволит повысить достоверность результатов испытаний в ледовом бассейне. В настоящей работе изложен подход к очистке от шума результатов измерений многокомпонентного динамометра, применяемого в ледовом бассейне Крыловского государственного научного центра (Санкт-Петербург), с использованием амплитудно-частотного анализа участков пробега модели по чистой воде в пределах технологического окна во льду. Предложенный метод показал свою эффективность, в особенности – для экспериментов с моделью больших размеров.

A model experiment in an ice tank allows to examine ice qualities of a designed ice-resistant marine structure, namely possible ice loads by measuring global loads with a multicomponent dynamometer. The sensitivity of the equipment leads to the noise interference in the measured signal caused by people's actions carrying out the experiment, by the operation of machines and mechanisms, hydrodynamic effects, as well as the phenomenae in the electrical power grid. It is important to separate noise interference from the relevant signal at the data processing stage, which will increase the reliability of ice tank experiments. This paper describes a method for denoising measurement results of a multicomponent dynamometer used in the ice tank of the Krylov State Scientific Center (St. Petersburg); the approach implies an amplitude-frequency analysis of model run areas in ice-free water within the technological window in the ice. The proposed method has demonstrated its effectiveness, especially for experiments with large models.
Integrated automation of wheeled ships technological processes
Authors: Бурда Е.М. , Перевезенцев С.В. , Плющаев В.И.
Published: December 2021

Появление судов с колесным движительно-рулевым комплексом, обладающих рядом специфических конструктивных и динамических особенностей, потребовало новых подходов к созданию алгоритмической и аппаратной базы для создания систем управления, обеспечивающих безопасную и эффективную эксплуатацию судов этого типа. Представлена структура судовой электростанции, ее особенности, связанные с обеспечением работы электропривода гребных колес и выполнения функций энергосбережения и резервирования. Приведены этапы развития комплексной системы контроля и управления для судов с колесным движительно-рулевым комплексом. Рассмотрена структура распределенной системы и ее аппаратная база, дающая широкие возможности автоматизации как отдельных подсистем и судовых технологических процессов, так и судна в целом. Приведены отдельные алгоритмы управления, реализованные в системе. Система позволяет модернизировать алгоритмическое обеспечение в процессе эксплуатации судна по мере возникновения ситуаций, требующих его коррекции. Обновление программных модулей не требует изменения структуры системы или аппаратной части системы.

The appearance of ships with wheeled propulsion/steering system with a number of specific structural and dynamic features required new approaches to creation of algorithmic and hardware base for creation of control systems ensuring safe and efficient operation of this type of ships. The structure of the ship's power plant, its features related to ensuring the operation of the electric drive of the propeller wheels and performing the functions of energy saving and redundancy are presented. The stages of development of integrated control and management system for ships with wheeled propulsion/steering system are given in the article. The distribution system structure and its hardware base are considered. The hardware base gives ample opportunities for automation both individual subsystems and the ship technological processes, and the ship as a whole. Some control algorithms implemented in the system are described. The system makes it possible to upgrade algorithmic support during the operation of the vessel as situations requiring its adjustment arise. Updating software modules does not require changing the system structure or the system hardware.
Rare roll event modeling of unmanned catamaran
Authors: Липко И.Ю.
Published: December 2021

Статья посвящена вопросу моделирования редких событий, которые возникают при качке катамарана. Система управления автономного катамарана должна уметь распознавать нежелательные ситуации, которые могут привести к осуществлению редких событий. В данной статье приводится несколько методов, позволяющих проводить моделирование редких событий и делать оценку риска возникновения редкого события. Методы основываются на теории больших уклонений. Первый метод позволяет оценить возможные «ожидаемые потери» при достижении редкого события путём оценки скорости убывания вероятности компонентов вектора состояния в редком состоянии. Оценка осуществляется путём расчёта квазипотенциалов из аттрактора до порогового значения состояния. Второй метод позволяет оценить вероятность движения вдоль наиболее вероятной траектории к редкому событию. Оценка осуществляется путём сравнения вектора состояния с состояниями на наиболее вероятной траектории к редкому событию. Точность оценок зависит от вектора состояния. Приводится сравнение с результатами, полученными с помощью метода Монте-Карло. Указанные методы могут быть использованы для создания систем супервизорного управления и систем поддержки принятия решений при оценке рискованности совершения морских переходов.

The article is devoted to the issue of modeling rare events that occur when a catamaran is pitching. The control system of an autonomous catamaran should be able to recognize undesirable situations that can lead to the rare events. This article provides several methods for modeling rare events and making estimation of risk of a rare event occurrence. The methods are based on the large deviations theory for dynamical systems. The first method allows to estimate possible losses via calculation of the probability decreasing rate of the state vector components in a rare state. The estimation is carried out by calculating the quasipotential from the state close to the attractor to the threshold state. The second method allows to estimate the probability of moving along the most likely trajectory to a rare event. The evaluation is carried out by comparing the studied state vector with the states on the most likely trajectory. The accuracy of the estimates depends on the studied state vector. A comparison with the results obtained using the Monte Carlo method. These methods can be used to create supervisory control systems and decision support systems when assessing the riskiness of sea navigation.
Acceleration of the underwater system of technical stereo vision with the help of multithreaded organization of algorithms
Authors: Жиляков П.В. , Фатеев С.И.
Published: December 2021

В настоящей работе дано описание многопоточной параллельной организации работы алгоритмов, входящих в состав программной части подводной системы технического стереозрения подводного робота. Данные, полученные системой технического стереозрения, в последствии поступают на систему управления для выполнения операций по управлению роботом и оператору на экран монитора для последующего принятия им управленческих решений. В большинстве случаев выполнение алгоритмов происходит последовательно. Суммарное время обработки одного кадра складывается из времени работы всех алгоритмов, входящих в состав программной части. Таким образом, в однопоточном режиме даже самые быстрые алгоритмы будут ожидать своей очереди на выполнение. Следовательно, система управления и оператор в случаях, требующих большие вычислительные мощности, будут получать данные недостаточно быстро. Естественно для увеличения быстродействия всей программной части возникает потребность организовать работу входящих в состав алгоритмов параллельно, многопоточно, но такой способ организации работы дополнительно создаёт ряд проблем, которых бы не было, если работа алгоритмов была организована последовательно, однопоточно. В статье приведены способы решения этих проблем, проведено сравнение времени работы многопоточной и однопоточной реализации алгоритмов.

This paper describes the multithreaded parallel organization of the algorithms that are part of the software of the underwater system of technical stereo vision of an underwater robot. The data obtained by the technical stereo vision system is subsequently transmitted to the control system to perform robot control operations and to the operator on the monitor screen for subsequent management decisions. In most cases, the algorithms are executed sequentially. The total processing time of one frame consists of the operating time of all algorithms included in the software part. Thus, in single-threaded mode, even the fastest algorithms will be waiting for their turn to execute. Consequently, the control system and the operator in cases requiring large computing power will not receive data quickly enough. Naturally, in order to increase the speed of the entire software part, there is a need to organize the work of the algorithms included in parallel, multithreaded, but this way of organizing work additionally creates a number of problems that would not exist if the algorithms were organized sequentially, single-threaded. The article presents ways to solve these problems, compares the operating time of multithreaded and single-threaded implementation of algorithms.
Technology Integration into the Teaching and Learning of Geography in Senior High Schools in Ghana: A TPACK Assessment
Authors: Bismark Mensah  , Adjoa Afriyie Poku  , Augustine Yao Quashigah
Published: December 2021

In Ghana, the integration of technology into the teaching and learning process seems to be making strides in tertiary education. However, the case is not the same in Senior High Schools. This study, therefore, sought to assess Senior High School Geography teachers' knowledge in integrating technology into their classroom adapting the Technological Pedagogical Content Knowledge (TPACK) model as a framework for analysis. The study adopted the descriptive survey design to provide a comprehensive analysis of the research problem. Through a survey, a total of 113 geography teachers participated in the study, responding to a TPACK survey questionnaire. The data were analysed using mean and standard deviation. The findings of the study showed that teachers possessed a high level of content and pedagogical knowledge in geography. The analysis, however, showed that teachers were not as confident as they were in content and pedagogy compared to technological knowledge and its subsequent integration into the teaching and learning of geography. It was, therefore, recommended among others that courses at the higher education level should integrate Information and Communication Technologies (ICTs) into teaching and learning to help student-teachers appreciate the place of specific technologies, hardware and software in the teaching and learning of their respective disciplines.
PREDICTING MAXIMAL COUNTERMOVEMENT JUMP HEIGHT FROM UPRIGHT AND SQUAT POSITIONS HEAD TITLE: UPRIGHT AND SQUAT MAXIMUM JUMP HEIGHT PREDICTORS
Authors: Suprak David , Amasay Tal
Published: December 2021

Introduction. Countermovement jump is common in sport and testing and performed from various starting positions. Little is known about effective contributions to maximal countermovement jump height from various starting positions. Purpose and Objectives. Determine effective jump height predictors and effect of starting position on countermovement jump height. Applied Methodology. Forty-nine collegiate athletes performed maximal height countermovement jumps from upright and squatting positions with arm movement. Several variables were calculated from kinetic data. Correlation and regression determined variables related to and predictive of jump height in both conditions. Paired t-tests evaluated differences in jump height. Achieved Major Results. Upright condition jump height positively correlated with peak force and power, eccentric and concentric impulses, and countermovement depth. Jump height prediction included peak force and power, and eccentric and concentric impulses. Squat condition jump height positively correlated with peak force and power, mean rate of force development, force generated at the beginning of propulsion, and concentric impulse. Jump height prediction equation included mean rate of force development, force at the beginning of propulsion, and peak power. Jump height was higher in the upright condition. Conclusions. Higher jumps are achieved from the upright position. Peak force, peak power, and concentric and eccentric impulses best contribute to upright jump height. Mean rate of force development, force at the beginning of propulsion, and peak power best predicted squat jump height. Limitations. We did not restrict arm movement, to encourage natural motion. Depth was not controlled, rather advising a comfortable depth. Subjects were recruited from various collegiate sports. Practical implications. Maximal jump height from various positions may be achieved through efforts to maximize jump peak power and increase musculotendinous loading in sport-specific starting positions. Originality/Value. This is the first study to explore the predictors of upright and squat countermovement jumps. These results can guide jump performance training.
RELEVANCE OF VO2 max CONSUMPTION IN ELITE BULGARIAN TAEKWONDO COMPETITORS
Authors: Avramov Dimitar
Published: December 2021

The aim of this study was to determine aerobic fitness through the VO2 max treadmill test of elite Bulgarian taekwondo players with international results, and to determine whether the aerobic system had an effect upon the sports result in taekwondo. Fourteen elite taekwondo athletes, members of the Bulgarian national team (8 male and 6 female) were tested using a continuous progressive treadmill test. Physiological characteristics such as maximal oxygen uptake (VO2 max), blood lactate and heart rate were measured. The male athletes recorded 58.2±3.4 ml kg–1 min–1 and the female 46.0±2.8 ml kg–1 min–1. The lactate level reached its highest at the 6’ after the VO2 maxwith results for the males of 11.5±3.7 (mmol l-1) and 9.9±4.1 (mmol l-1) for the females respectively. A comparison between our results, regarding VO2 max and previously reported was made using the One-way ANOVA for independent samples. It showed no significant difference between the male subjects (58.2±3.4 versus 60.7±3.3 ml kg(-1) min(-1), p>.05) and significant difference between the female ones (46.0±2.8 versus 49.8±2.8 ml kg(-1) min(-1), p
Robust Exponential Stabilization for a Class of Nonlinear Uncertain Systems with Time-varying Delays
Authors: Liu Meng , Dong Yali , Tang Xinyue
Published: December 2021

This paper is concerned with the problem of robust exponential stabilization for a class of nonlinear uncertain systems with time-varying delays. By using appropriately chosen Lyapunov-Krasovskii functional, together with the Finsler’s lemma, sufficient conditions for exponential stability of nonlinear uncertain systems with time-varying delays are proposed in terms of linear matrix inequality (LMI). Then, novel sufficient conditions are developed to ensure the nonlinear uncertain system with time-varying delay is robust exponentially stabilizable in terms of linear matrix inequality with state feedback control. Finally, a numerical example is given to illustrate the efficiency of proposed methods.
CHARACTERIZATION OF ANATOMICAL, MORPHOLOGICAL, PHYSICAL AND CHEMICAL PROPERTIES OF KONAR (ZIZIPHUS SPINA-CHRISTI) WOOD
Authors: GHALEHNO MOHAMMAD DAHMARDEH , SHESHKAL BABAK NOSRATI , KOOL FARHAD , HUMAR MIHA , BAHMANI MOHSEN
Published: December 2021

The goal of this research is to investigate some morphological (fibre length, fibre diameter, cell wall thickness, Runkel coefficient, flexibility coefficient, slenderness coefficient, rigidity coefficient, Luce's coefficient, solid coefficient), physical (dry wood density, volumetric shrinkage) and chemical (cellulose, hemicellulose, lignin, ash and acetone soluble extractives contents) composition of Konar (Ziziphus spina-christi) wood grown in Hormozgan province, Iran. For this purpose, three normal trees were selected randomly and a disk was cut from each one at breast height. Anatomical inspection revealed that the species was diffuse porous, with distinctive growth rings, simple preformation plate, with polygonal openings, and banded or diffuse-in aggregates parenchyma. The average values of wood dry density, fiber length, fiber diameter, cell wall thickness, Runkel coefficient, flexibility coefficient, felting coefficient, Luce’s coefficient, solid coefficient, rigidity coefficient were 0.926, 52.1, 77.85, 0.57, 163 ×103 μ3 and 0.48. Cellulose, hemicellulose, lignin, acetone soluble, extractives, ashcontents were43.34, 19.98, 33.9, 6.42 and 2.78%, resp.
THE INFLUENCE OF ENCLOSURE ON BURNING CHARACTERISTICS OF OSB FURNISHINGS
Authors: MÓZER VLADIMÍR , HEJTMÁNEK PETR , PITELKOVÁ DANIELA , HASALOVÁ LUCIE
Published: December 2021

This paper presents a series of full-scale tests conducted with office furniture made from OSB boards. Ignition source (30 kW gas burner) position and enclosure effects, free burn vs. ISO 9705 room, were evaluated from the perspective of instantaneous (HRR) and total heat (THR) released by the fuel packages. It was found that both of the evaluated factors have impact primarily on HRR – the peak ranging from 874 kW to 1 154 kW was delayed by approx. 50 to 60 s in the free-burn experiments; the THR remained relatively consistent at approx. 875 ± 30 MJ, meaning that in the observed period very similar amounts of fuel were burned. The thermal feedback within the enclosure seemed to be partially counteracted by the lack of oxygen, resulting in slightly higher HRR in free-burn test following the first peak. The findings of the research are applicable to fire hazard prediction by fire modelling.
EFFECT OF EDGE DISTANCES ON STIFFNESS OF SHEAR-TENSION MODE IN GLULAM CONNECTIONS WITH INCLINED SCREWS
Authors: LIU YIFAN , YAO ZIYIN , WANG FEIBIN , HUANG HUI , QUE ZELI
Published: December 2021

The effects of edge distances on stiffness in glulam connections with inclined self-tapping screws were studied in this paper. Under four anchorage angles (A-45°, A-60°, A-75°, A-90°) and three edge distances (EG-2D, EG-4D, EG-6D) conditions, the shear-tension tests were carried out on the timber structure connections with inclined self-tapping screws, and the stiffness and other properties of the connections were tested. Based on the results, the effects of edge distances on stiffness in joints were quantified using the equivalent energy elastic-plastic (EEEP) model. The results showed that the edge distances had a certain impact on the yield mode and load-carrying performance of the joints. Within a certain range of variation, as the edge distance increased, the stiffness of the connections increased gradually, showing a positive correlation. The stiffness of specimen EG-2D is 4.41 kN·mm-1. The stiffness of specimen EG-4D is 10.04 kN·mm-1, which increasesby 128% compared with the specimen EG-2D. The stiffness of specimen EG-6D is 12.08 kN·mm-1, which increases by 174% compared with the specimen EG-2D. However, the ductility coefficient, yielding load, and energy dissipatinghave no significant change. Within a reasonable edge distance, only ductile damage occurred.
ANATOMICAL PROPERTIES OF STRAW OF VARIOUS ANNUAL PLANTS USED FOR THE PRODUCTION OF WOOD PANELS
Authors: MIRSKI RADOSŁAW , BANASZAK ALEKSANDRA , FABISIAK EWA , SIUDA JOANNA
Published: December 2021

The aim of this study was to determine basic anatomical features of annual plant fibers used as wood substitutes for the production of wood-based panels. For this purpose rye, wheat, triticale, rape and corn straw were used. The determination of the morphological features of the fibers was conducted on the macerated material. Fiber lengths, fiber diameters and lumens were measured, and then the fiber wall thicknesses and slenderness ratios were calculated. The result clearly showed significant differences among all fiber characteristics of the tested plants. The strength and direction of the relationship between the anatomical properties determined in the study and the physicomechanical properties of the boards produced with straw from the tested annual plants were identified.
Determinan Audit Judgment Auditor Di Masa Pandemi Covid-19
Authors: Agustiawan Agustiawan , Suci Rama Gita , Fauziah Rahmatul
Published: December 2021

The purpose of this study was to partially examine the effect of compliance pressure, time budget pressure, and auditor experience on audit assessments during the Covid-19 Pandemic. Sampling in this study using non-probability sampling with saturated samples. Respondents in this week's study were auditors of new public accounting firms. This research method is a quantitative method. The data analysis technique used is multiple linear regression analysis. The results of this study indicate that compliance pressure, time budget pressure, and auditor experience each have an effect on audit assessments during the Covid-19 pandemic.
Analisa Kinerja Keuangan Bank BUMN dan Bank Swasta Berdasarkan Rasio Keuangan
Authors: Misral Misral , Rahmayanti Sri , Rahayu Norra Isnasia
Published: December 2021

This final project discusses the comparison of the financial performance of state-owned banks and private banks based on financial ratios in the 2015-2019 period. The financial ratios used consist of CAR, NPL, NIM, BOPO, ROA, ROE, and LDR. The data used in this study were obtained from published financial reports for 2015 to 2019 published by the respective banks. After passing the purposive sample stage, 4 state-owned banks and 9 private banks were obtained as samples in this study. The results of this study explain that there are differences in the financial performance of state-owned banks and private banks as measured by financial ratios. State-owned banks have better performance in terms of ROE, ROA, CAR ratios, while private banks have better performance in terms of NPL, BOPO, LDR ratios.
Granulated Expanded Glass Manufacturing Method Using Electromagnetic Waves
Authors: Paunescu Lucian , Axinte Sorin Mircea , Cosmulescu Felicia , Dragoescu Marius Florin
Published: December 2021

The paper presents experimental results obtained in the process of experimental manufacture in a microwave oven of lightweight granulated glass aggregates. The process was conducted to obtain the highest dimensional class (between 18-23 mm), the almost spherical shape of the aggregates being facilitated by cold processing of raw spherical pellets (between 11-15 mm) containing the powder mixture formed by glass waste, borax. calcium carbonate, aqueous sodium silicate solution and water addition and then rotation of the high electromagnetic wave susceptible ceramic crucible containing raw pellets during the heat treatment at temperatures between 822-835 ºC. In terms of quality, the expanded glass aggregate granules are almost similar to those manufactured in conventional rotary kilns heated by burning fuel, having the following characteristics: bulk density of 0.17 g/cm3, compressive strength of 2.2 MPa, thermal conductivity of 0.047 W/m·K, water absorption of 1 vol. % and pore size between 0.3-0.6 mm. The experimental product has not yet been tested as a raw material in the manufacture of some light weight concretes, but the use of similar granulated glass aggregates manufactured in the world confirms the ability of this aggregate type to produce light weight and energy efficient concretes for building construction.
Meningkatkan Minat Membaca pada Anak Usia Dini Melalui Metode Bercerita Dengan Gambar di PAUD Andini Kelurahan Bulotadaa Timur Kecamatan Sipatana Kota Gorontalo
Authors: Djuko Rapi
Published: December 2021

Permasalahan yang peneliti angkat dalam penelitian ini adalah apakah minat membaca anak di PAUD Andini Kelurahan Bulotadaa Timur Kecamatan Sipatana Kota Gorontalo dapat meningkat melalui metode bercerita dengan gambar? Adapun tujuan dari penelitian ini adalah untuk meningkatkan minat membaca anak di PAUD Andini Kelurahan Bulotadaa Timur Kecamatan Sipatana Kota Gorontalo melalui metode bercerita dengan gambar. Untuk mendapatkan jawaban terhadap permasalahan di atas, peneliti melakukan penelitian tindakan kelas pada anak kelompok B PAUD Andini Kelurahan Bulotadaa Timur Kecamatan Sipatana Kota Gorontalo yang jumlah siswanya 20 orang, dengan sistem pembahasan dalam bentuk tiga siklus. Kekurangan atau ketidaktuntasan pada siklus sebelumnya telah dibahas pada siklus selanjutnya. Sebagai implikasi atau saran dalam penelitian ini adalah diharapkan tutor PAUD pada umumnya untuk dapat mengoptimalkan penggunaan metode bercerita dengan gambar dalam rangka meningkatkan minat membaca bagi anak.
Manajemen Pelatihan Permainan Tradisional Edukatif Berbasis Potensi Lokal Dalam Meningkatkan Pengetahuan Dan Keterampilan Orang Tua Anak Usia Dini
Authors: Rahmat Abdul , Mirnawati Mira
Published: December 2021

The results of this study generally concluded (1) study participants do not yet have advanced literacy skills that are meaningful to the needs of life, because the materials learning materials and learning activities do not fit the needs of local tutors, (2) development of literacy learning model based on local potential of agriculture can significantly empower Indigenous Communities. Local potential is developed into a learning module literacy, literacy tutor training, learning implementation, and evaluation of results provided by the potential skills of local content, (3) implementation of the development of functional literacy learning model based on local potential of agriculture is packaged in three stages, namely preparation, implementation, and evaluation (4) the effectiveness of the development model of literacy learning in study groups to apply model-based functional literacy development of local potential is better when compared with the study group who did not apply the intervention model development study. The effectiveness of model development, learning development and empowerment of remote indigenous communities in literacy programs, with one another have a significant positive relationship. The effectiveness of model development and learning development partially or simultaneously both significant positive effect on the empowerment of remote indigenous communities in the functional literacy program.
Pendampingan Pelaksanaan Donor Darah Sebagai Upaya Penyediaan Darah Pada Palang Merah Indonesia Kutai Timur
Authors: Yasin Muhammad , Mubarok Ramdanil , Widyanti Eka
Published: December 2021

Kurangnya kesadaran masyarakat untuk mendonorkan darah sehingga terjadinya pasokan/stok darah yang sangat minim di kantor Palang Merah Indonesia (PMI) kabupaten Kutai Timur. Tujuan pengabdian ini yaitu untuk mendampingi kegiatan donor darah sehingga tercukupinya ketersediaan stok darah, dan faktor pendukung serta penghambat pelaksanaan donor darah Palang Merah Indonesia (PMI) kabupaten Kutai Timur. Metode yang digunakan adalah metode participatory dengan mengidentifikasi kebutuhan, penyusunan rancangan konsep, dan pelaksanaan kegiatan. Hasilnya kegiatan tersebut dihadiri sejumlah 60 peserta yang mmenuhi syarat sebagai pendonor darah. Kegiatan donor darah tersebut mendapatkan 26 kantong darah. Adapun faktor pendukung kegiatan tersebut yaitu antusias warga, dapat mengurangi risiko terkena serangan jantung dan dapat menghasilkan sel-sel darah merah yang baru. Kemudian faktor penghambatnya pertama yaitu adanya warga yang tidak memenuhi syarat untuk melakukan donor darah, serta koordinasi dan sosialisasi yang kurang. Implikasi dari pendampingan ini diharapkan Palang Merah Indonesia mempunyai stok darah yang cukup sehingga memudahkan pemenuhan kebutuhan darah untuk masyarakat.
The Compliance of Intern Nursing Students With Isolation Precautions; During COVID-19 Pandemic Process
Authors: ASLAN Hakime , TÜRKBEN POLAT Hilal
Published: December 2021

Aim: The present study was conducted to determine the level of compliance of intern nursing students with isolation precautions and the factors affecting them.Material and Method: The research was carried out with fourth-year nursing students in the internship program in a university hospital between December 2020 and April 2021. The data were collected using the “Participant Information Form” and the “Isolation Precautions Compliance Scale”. Results: It was determined that the students received a total of 76.11±9.86 points from the Isolation Precautions Compliance Scale. The statistical analysis indicated that there was no significant difference between the compliance with isolation precautions and the variables of age, gender, the type of the clinic, the training received about isolation precautions and providing care to the isolated patient (p>0.05). However, it was found that the difference between the compliance with isolation precautions and the variables of the pandemic process and knowing the infection rate of the institution was significant (p<0.05).Conclusion: It was concluded that the compliance of the intern nurses with isolation precautions was quite high.
Celibacy or Marriage? Dilemmas for Buddhist Monks in Korea
Authors: Mecsi Beatrix
Published: December 2021

Following the Confucian period of the Chosŏn era, which overshadowed Buddhists and confined them to the margins of society, at the beginning of Japanese colonial rule the possibility of monastic marriage typical of Japanese practice emerged as a viable alternative for Korean Buddhists in the early twentieth century. While the repressive memory of Japanese colonial heritage often appears in the relevant literature about clerical marriage today as the main reason for Korean Buddhists to get married, an analysis of contemporary documents presents us with a much more complex picture. Most notably among Korean intellectuals, one of the most significant personalities of the era, Manhae Han Young’un’s (1879−1944) systematically urged the reform of Korean Buddhism, Chosŏn Pulgyo yusinnon 朝鮮 佛 敎 維新 論 (Treatise on the Restoration of Korean Buddhism). In connection with the presentation and circumstances of the thirteenth point formulated to allow polemics and the practice of priestly marriage, we can see that his Confucian education, personality, and life play as important a part in his reasoning as the ideologies of the era, social Darwinism and modernism, and democracy. But primary sources revealing the daily lives and circumstances of the monks also show that thewillingness to marry was also greatly influenced by the new inheritance rules introduced in the Japanese colonial system.
Pihon yŏsŏng – New Lifestyle and New Choices for Marriage and Unmarried Life in South Korea
Authors: Kovács Ramóna
Published: December 2021

In recent decades, the term pihon has become widely used among young Koreans, and it actually refers to a growing tendency: more and more men and women choose not to marry, even if this goes against the traditional social norms and the expectations of society. There are social, economic and psychological factors that influence this decision. For Koreans in their 20’s it is not easy to find stable employment; thus they tend to marry later and to have their first child when they are already in their 30s. As for having children, we should note that the birth rate in South Korea is extremely low; something that the government too finds alarming. However, it is difficult to encourage young people to have more children, since uncertainty about employment, poor support for mothers, high tuition fees and gender roles all affect this life-changing decision. The pihon, people who choose not to marry, have a very different lifestyle: members of the group prefer to focus on their careers, their independent lives and their own way of living. It is interesting that society’s view is – albeit slowly – also changing, and this attitude is more and more widely accepted, even though the older generations would prefer the traditional family structure. Of course, singles have to face problems such as loneliness, but they tend to think of it as “convenient” rather than “sad”. There is a notable paradox in Korean society – traditional concepts are still powerful in the 21st century, but circumstances can no longer ensure the conditions to support them. This causes misunderstandings and a wide gap between generations.
ANALYSIS OF EXPRESSION OF MIRNA AND MRNA IN THE CELLULAR MATERIAL OF THE STOMACH LINING OBTAINED BY ESOPHAGOGASTRODUODENOSCOPY IN ORDER TO DETECT DYSPLASIA AND STOMACH CANCER
Authors: Anischenko V. V. , Arkhipova A. A. , Titov S. E. , Poloz T. L. , Bubnov I. V.
Published: December 2021

miRNA and mRNA are highly specific molecular markers, with their own unique expression profile for each type of tissue. They can become a valuable tool in clinical practice in addition to routine esophagogastroduodenoscopy.Purpose. To study the prospects of using a classifier based on miRNA and mRNA profiling in cytological samples for detecting dysplasia and stomach cancer, as well as to compare the obtained data with the results of profiling of 7 miRNAs used for the analysis of both histological and cytological material.Materials and methods. The study included 221 cytological preparations: 108 samples of adenocarcinoma, 27 samples of dysplasia, 86 samples of normal mucosa. The expression level of miRNA-145-5p, -150-5p, -21,-20a, -31-5p, -34a-5p, -375, -125b, -196b, -106b and mRNA of the following genes: TERT, CDKN2A, CKS2, FN1, was determined using real-time reverse transcription polymerase chain reaction. Quantitative comparison of two independent samples for was performed using the Mann-Whitney test. The samples were stratified into different groups using the C5.0 algorithm.Results: when examining cytological samples in cases of miRNA-125b, 145, -196b, -21, -375 and TERT, СKS2, FN1 mRNA, there was achieved a high level of significance of differences in the cancer/norm group; miRNA-375 and FN1 mRNA in the cancer/dysplasia group and miRNA-145, -196b, -20a, and СKS2, TERT mRNA in the norm/dysplasia groups. When comparing the results for the 7 miRNAs that were used to analyze both histological and cytological material, several differences was noted.Conclusion. The practical use of miRNA and mRNA expression (in cytological material data mining technology does not allow differentiating dysplasia and cancer but can help in identifying "high-risk patients" who should repeat esophagogastroduodenoscopy with multifocal forceps biopsy, with mandatory molecular genetic research.
THE ROLE OF THE UROKINASE SYSTEM IN LYMPHOGENOUS METASTASIS OF COLORECTAL CANCER
Authors: Agapov M. A. , Krivonosova D. A. , Semina E. , Kakotkin V. V. , Garmanova T. N. , Markaryan D. R.
Published: December 2021

The aim of this work was to study the role and relationship of the levels of the components of the urokinase system with lymphogenous metastasis in patients with colorectal cancer.Materials and methods: the study was carried out on the basis of the Medical Scientific and Educational Center of the Moscow State University named after M.V. Lomonosov from 2019 to 2021. The study included healthy donors (control group) and patients with a verified diagnosis of stage I-III colorectal cancer in accordance with the inclusion criteria; all patients underwent surgical resection of the primary tumor with lymphadenectomy of the appropriate level. All patients underwent determination of the level of uPA and uPAR in blood serum before surgery. We also analyzed the clinical and demographic data of the patients, as well as the pathomorphological characteristics of the tumor.Results. The study included 7 healthy donors and 49 patients with stage I-III colorectal cancer. The average level of serum urokinase in the control group was 2.7±1.04 ng / ml, in the study group – 4, 15±1.9 ng / ml (p = 0.071), the level of the urokinase receptor in the control and study groups was 1.36 ±0.8 ng / ml vs 3.22±2.06 ng / ml (p = 0.05). The average level of serum urokinase in patients without and with lesions of lymph nodes was 3.4±1.4 ng / ml and 4.4±2.3 ng / ml (p = 0.068).Conclusion. There is a tendency to an increase in the level of components of the urokinase system in the peripheral blood in patients with colon neoplasms in the preoperative period, depending on the presence of metastatic lesions of regional lymph nodes, which indicates the need for further research in this area.
HST/WFC3 Complete Phase-resolved Spectroscopy of White-dwarf-brown-dwarf Binaries WD 0137 and EPIC 2122
Authors: Zhou Yifan , Apai Dániel , Tan Xianyu , Lothringer Joshua D. , Lew Ben W. P. , Casewell Sarah L. , Parmentier Vivien , Marley Mark S. , Xu 许 Siyi 偲艺 , Mayorga L. C.
Published: December 2021

Brown dwarfs in close-in orbits around white dwarfs offer an excellent opportunity to investigate properties of fast-rotating, tidally locked, and highly irradiated atmospheres. We present Hubble Space Telescope Wide Field Camera 3 G141 phase-resolved observations of two brown-dwarf-white-dwarf binaries: WD 0137-349 and EPIC 212235321. Their 1.1–1.7 μm phase curves demonstrate rotational modulations with semi-amplitudes of 5.27% ± 0.02% and 29.1% ± 0.1%; both can be fit well by multi-order Fourier series models. The high-order Fourier components have the same phase as the first-order and are likely caused by hot spots located at the substellar points, suggesting inefficient day/night heat transfer. Both brown dwarfs’ phase-resolved spectra can be accurately represented by linear combinations of their respective day- and nightside spectra. Fitting the irradiated brown dwarf model grids to the dayside spectra require a filling factor of ∼50%, further supporting a hot spot dominating the dayside emission. The nightside spectrum of WD 0137-349B is fit reasonably well by non-irradiated substellar models, and the one of EPIC 21223521B can be approximated by a Planck function. We find strong spectral variations in the brown dwarfs’ day/night flux and brightness temperature contrasts, highlighting the limitations of band-integrated measurements in probing heat transfer in irradiated objects. On the color–magnitude diagram, WD 0137-349B evolves along a cloudless model track connecting the early-L and mid-T spectral types, suggesting that clouds and disequilibrium chemistry have a negligible effect on this object. A full interpretation of these high-quality phase-resolved spectra calls for new models that couple atmospheric circulation and radiative transfer under high-irradiation conditions.