bluuebunny/crossref_metadata_2025 huggingface dataset:
The peculiarities for structural analysis of strength and stiffness of floating docks with the long span overhead-type cranes
Authors: Жестков К.Г. , Шахнов М.А.
Published: December 2023

В статье представлены основные требования к облику крытого стального плавучего дока, а также к конструкции большепролетных мостовых кранов и их подкрановому основанию. Рассмотрен спектр нагрузок при эксплуатации дока, определяющий особенности расчетного обоснования прочности и жесткости конструкций. Выполнено адаптирование нормативной базы для опорного основания мостовых кранов морского исполнения. Разработаны и внедрены конструктивные мероприятия по условиям размещения на плавучем доке кранового пути для двухбалочных мостовых кранов опорного типа. Выполнено расчетное обоснование прочности и жесткости плавучего сооружения в целом на основе единой конечно-элементной (КЭ) расчетной модели дока с крышей. Обеспечена работоспособность большепролетных мостовых кранов морского исполнения и многопролетных неразрезных подкрановых конструкций с часто установленными опорами при помощи расчетных КЭ подмоделей.

In the paper there are represented the general requirements for structural design of covered floating dock from steel, long span overhead-type cranes and their runway foundation. The spectrum of the force and kinematic loads was considered. It defines some peculiarities for structural analysis of strength and stiffness of a floating dock in operation. Adaptation the rules of regulations for a marine design of the crane runway foundation was performed. The structural improvements, based on restrictions of runway layout, were developed and introduced for the double span overhead-type crane carried by runway rails in floating dock. The analytical substantiation of strength and stiffness of covered floating dock was done by means of the uniform finite element (FE) model. Reliability of the marine overhead-type cranes and the multispan continuous gantry girders, which supported by frequently installed runway columns, was validated using FE submodeling.
Methodological foundations and results of practical application of the software package for modeling the rolling of the vessel on the PSPD
Authors: Смирнов Ю.А. , Тряскин В.Н. , Иванова Д.Т. , Булкин В.А. , Левошкин А.К.
Published: December 2023

В тезисах доклада обсуждается методика накатки судна на подъемно-спусковой плавучий док (ПСПД) при наличии одной или двух опор. Отмечены причины, обуславливающие отсутствие специальной универсальной методики, содержащей обстоятельные рекомендации для разработки проектов передаточных плавучих доков и моделирования процесса накатки судна на док при различных условия докования. Рассмотрены этапы процесса накатки судна. Указаны, что перед проведением операции накатки судна, производится предварительная балластировка дока для обеспечения равновесной посадки на ровный киль за счет принятия: балласта, выравнивающего крен и дифферент; балласта, замещающего массу судна; балласта на всплытие с опор. Предполагается, что к моменту начала накатки, док располагается на опорах. В соответствующие отсеки принято необходимое количество прижимного, сгонного и маневренного балласта. Определены допускаемые нагрузки на опоры, предельно допускаемая величина изгибающего момента от общего продольного изгиба дока, допускаемые величины прогибов корпуса дока в реперных (контрольных) точках. Сформулированы общая последовательность действий и расчетных обоснований - общий алгоритм, который может быть заложен в основу автоматизированной системы для управления процессом накатки судна на док. Представлены результаты компьютерного моделирования накатки судна при наличии двух опор береговой и мористой и только одной береговой опоры на существующий ПСПД.

The abstract discusses the methodology of bumping a vessel on a transfer floating dock (TLFD) in the presence of one or two supports. The reasons are noted, which cause absence of special universal technique, containing detailed recommendations for development of projects of transfer floating docks and modeling of the process of ship bumping on a dock at various conditions of docking. The stages of ship rolling process are considered. It is specified that before vessel rolling operation, preliminary ballasting of dock is carried out to provide equilibrium landing on an even keel by means of: ballast to level the roll and trim; ballast to replace the vessel mass; ballast for surfacing from the supports. It is assumed that by the time the rolling starts, the dock is positioned on the supports. Necessary amount of clamping, run-in and maneuvering ballast is taken into the corresponding compartments. Permissible loads on the supports, maximum permissible value of bending moment from total longitudinal bending of the dock, permissible values of deflections of the dock hull at reference (control) points are determined. A general sequence of actions and computational justifications is formulated. It is a general algorithm, which can be the basis for an automated system for controlling the process of ship bending on the dock. Results of computer simulation of ship bumping at presence of two shore and bridge supports and only one shore support on the existing RAP are presented.
Application of the neural network method to determination of the physical and mechanical properties of composite materials
Authors: Коршунов В.А. , Кузнецова В.Н. , Мудрик Р.С. , Пономарев Д.А. , Родионов А.А.
Published: December 2023

Рассматриваются процедуры понижения размерности задачи определения упругих характеристик композитных материалов различной структуры. В качестве исходного варианта принят полный метод расчета, базирующийся на использовании модели представительного элемента объема (ПЭО-модели). Расчет параметров напряженно-деформированного состояния и определение упругих характеристик ПЭО-модели реализованы с помощью метода конечных элементов. Отмечены особенности создания ПЭО-модели и задания граничных условий, определяющих периодичность структуры композиционного материала. Рассмотрены варианты ПЭО-моделей для материала с волокнистой структурой и с дискретными включениями. Представлен алгоритм получения упругих параметров материала и дана оценка временных затрат на его реализацию. Редуцирование размерности задачи выполнено с помощью нейросетевых моделей путем построения нейронной регрессионной сети ПЭО. Для реализации нейронной сети собрана обучающая выборка путем решения большого количества тестовых задач с использованием полного метода. Обучение сети проведено на основе алгоритма оптимизации, реализованного на языке Python. Для каждого из рассмотренных вариантов ПЭО-модели определены весовые коэффициенты. Выполнена оценка погрешности нейронной сети.

The procedures for reducing the dimensionality of the problem of determining the elastic characteristics of composite materials of various structures are considered. A complete calculation method based on the usage of a representative volume element model (RVE-model) was adopted as an initial variant. Calculation of the parameters of the stress-strain state and determination of the elastic characteristics of the RVE model are implemented using the finite element method. The features of creating a RVE model and setting boundary conditions that determine the periodicity of the composite material structure are noted. Variants of RVE models for a material with a fibrous structure and with discrete inclusions are considered. An algorithm for obtaining elastic parameters of the material is presented and an estimate of the time spent on its implementation is given. Reducing the dimension of the problem was performed using neural network models by constructing a neural regression network of RVE. To implement a neural network, a training sample was collected by solving a large number of test problems using the full method. The training of the network was carried out on the basis of an optimization algorithm implemented in Python. Weight coefficients are determined for each of the considered variants of the RVE model. The estimation of the error of the neural network is performed.
Application of numerical methods to brittle fracture modeling
Authors: Коршунов В.А. , Мащенко А.В. , Мудрик Р.С. , Пономарев Д.А. , Родионов А.А.
Published: December 2023

Рассмотрено решение задачи о хрупком разрушении с помощью численных процедур метода конечных элементов. Задача актуальна для решения проблемы форм разрушения конструкций и для проблемы внешних воздействий ледовых образований на морские инженерные сооружения. Повышение эффективности решения задачи о разрушении обеспечено использованием расчетных процедур, адаптированных для учета процессов, происходящих в материале и конструкции в процессе разрушения. В работе исследованы три процедуры распространения хрупких трещин в рамках МКЭ: адаптивное перестроение сетки конечных элементов; специальные конечные элементы, с эффектом раскрытия трещины и введение специальной сцепляющей зоны по границам конечных элементов, где возможно продвижение трещины. Эффективность процедур проверена при примере хрупкого разрушения трехмерного ледового образца в форме параллелепипеда на трехточечный изгиб. Проведен анализ чувствительности при варьировании характерного для каждой процедуры параметра разрушения. Результаты расчета сопоставлены с экспериментальными данными. Выполнен сравнительный анализ рассмотренных процедур по точности полученных результатов, по эффективности получения решения и по трудоемкости реализации.

The solution of the brittle fracture problem with the help of numerical procedures of the finite element method is considered. The task is relevant for solving the problem of structural failure forms and for the problem of external impacts of ice formations on marine engineering structures. Improving the efficiency of solving the problem of destruction is provided by the use of calculation procedures adapted to account for the processes occurring in the material and structure during the destruction process. In this paper, three procedures for the propagation of brittle cracks in the framework of FEM are investigated: adaptive rearrangement of the finite element grid; special finite elements, with the effect of crack opening and the introduction of a special coupling zone along the boundaries of the finite elements, where it is possible to advance the crack. The effectiveness of the procedures was tested by the example of brittle fracture of a three-dimensional ice sample in the form of a parallelepiped to a three-point bend. Sensitivity analysis was carried out when varying the destruction parameter characteristic of each procedure. The calculation results are compared with experimental data. A comparative analysis of the considered procedures is carried out on the accuracy of the results obtained, on the effectiveness of obtaining a solution and on the complexity of implementation.
Numerical modeling of ice mechanical behavior under quasi-static and dynamic loads
Authors: Родионов А.А. , Рябушкин С.В.
Published: December 2023

Представлена математическая модель деформирования и разрушения льда в широком диапазоне внешних воздействий. Модель основана на методе сглаженных частиц Галёркина (SPG) и современных подходах механики повреждаемых сред. В качестве модели материала для льда используется модель динамического разрушения Джонсона-Холмквиста. В рамках единой модели выполнено численное моделирование квазистатического (скорость 1 мм/с) и динамического (скорость 10 м/с) сжатия ледовых образцов. Результаты численного моделирования находятся в согласии с экспериментальными наблюдениями. Представлены подходы к учету факторов, напрямую влияющих на прочностные характеристики ледовых образований – скорость деформации, гидростатическое давление, а также температура, пористость и соленость – в рамках единой вычислительной модели. Рассмотрены возможности сопряжения бессеточного метода Галеркина с классическими сеточными методами механики сплошной среды с целью моделирования взаимодействия льда с конструкциями и сооружениями. В настоящее время в задачах ледовой механики численное моделирование практически не применяется, а существующие традиционные методы не могут описать комплексное поведение льда, особенно при высоких скоростях деформаций. В этой связи построение и реализация подобного рода моделей является необходимым условием для эффективного решения задач прикладной механики льда, соответствующих современному уровню развития численных методов и соответствующих вычислительных возможностей.

A mathematical model of ice deformation and destruction under a wide range of external influences is presented. The model is based on the Smoothed Particle Galerkin method (SPG) and the recent approaches of damageable medium mechanics. The Johnson-Holmquist damage model is used as the material model for ice. Numerical modeling of quasi-static (velocity 1 mm/s) and dynamic (velocity 10 m/s) ice samples compression was performed within the unified numerical model. The numerical simulation results are in a good agreement with the experimental observations. The influence of the main factors affecting the ice strength characteristics – strain rate, pressure, temperature, porosity and salinity – is considered. Coupling between the SPG and the standard mesh methods of continuum mechanics in order to simulate ice-structure interaction is proposed and discussed. At present, numerical modeling in ice mechanics problems is practically not used. Meanwhile the existing traditional methods cannot fully simulate the complex ice behavior, especially at high strain rates. Thus, the development of this kind of models is a necessary condition in order to solve ice mechanics problems effectively. The instruments applied correspond to the most recent numerical methods and computational capabilities.
Numerical simulation of a periodic quasi-switching mode of vortex generation and heat transfer in a conical dimple with an inclination angle of 10° on the wall of a narrow channel
Authors: Исаев С.А. , Никущенко Д.В. , Никущенко Е.А.
Published: December 2023

Обосновывается применимость решения нестационарных осредненных по Рейнольдсу уравнений Навье-Стокса (URANS) для численного моделирования периодического квазипереключательного режима вихревой генерации и теплообмена в глубокой конической лунке с углом уклона 10о на стенке узкого канала. Для расчета турбулентного режима используется модифицированная с учетом влияния кривизны линий тока в рамках подхода Роди-Лешцинера-Исаева модель переноса сдвиговых напряжений Ментера 2003 года. При Re=104 установлен период колебаний поперечной Rz и продольной силы Rx, а также суммарной теплоотдачи Numm на контрольный участок нагретой стенки канала с лункой, равный 60, который соответствует числу Струхаля St=0.0167. Компьютерная визуализация закрученных струйно-вихревых потоков демонстрирует источники типа фокусов на боковых гранях лунки. На автоколебательном режиме формируется двухячеистая вихревая система с различной интенсивностью на периоде колебаний Rz. Периодические изменения трения, числа Нуссельта и температуры зарегистрированы в продольной и поперечной срединных сечениях лунки и отражают колебания вихревой структуры слева-направо и справа-налево. Показано формирование веерной струи, которая колеблется относительно плоскости продольной симметрии, вызывая перераспределение силовых и тепловых нагрузок.

The present article substantiate application of URANS approach to numerical simulations of a periodic quasi-switching mode of vortex generation and heat transfer in a deep conical dimple with an inclination angle of 10° on the wall of a narrow channel. The F. Menter's SST k-omega turbulence model of 2003 year was used considering streamlines curvature on a basis of the Rodi-Leshtsiner-Isaev approach. At the Reynolds number equal to 10^4 the period of oscillation of the transverse Rz and longitudinal force Rx has been determined, total heat transfer Numm in a reference section of a heated wall of the channel with a hole at St=0.0167 was also computed. Computer visualization of swirling jet-vortex flows demonstrates sources such as focuces on the dimple's side faces. In the self-oscillating mode, a two-cell vortex system is formed with different intensities over the oscillation period Rz. Periodic changes in friction, Nusselt number and temperature are arised in the longitudinal and transverse middle sections of the dimple and reflect fluctuations of the vortex structure from left to right and from right to left. The formation of a fan jet is shown, which oscillates relative to the plane of longitudinal symmetry, causing a redistribution of power and thermal loads.
Technology of removing carbon dioxide by seawater in the saturator of the fuel processor of the underwater vehicle
Authors: Дядик А.Н. , Маловик Д.С.
Published: December 2023

Статья посвящена разработке технологии очистки водорода от примесей диоксида углерода в сатураторе подводного аппарата. Принято, что в сатураторе реализуется пузырьковый режим течения двухфазной смеси с монодисперсной структурой, для оценки эффективности работы сатуратора в первом приближении. Разработана математическая модель сатуратора, являющегося составным элементом топливного процессора воздухонезависимой энергетической установки с электрохимическим генератором для подводных объектов на основе конвективной и молекулярной диффузии. Установлено, что требуется определение поверхности массообмена, состоящей из суммы поверхностей всех газовых пузырьков в объеме сатуратора. Выполнены расчеты по математической модели для трех вариантов подачи жидкости в объем сатуратора, на основе которых сделан вывод о невозможности полного растворения углекислого газа в сатураторе при относительном объемном расходе жидкости, равном единице, поэтому в системе очистки требуется вторая ступень очистки – абсорбер.

The article is devoted to the development of a technology for purifying hydrogen from carbon dioxide impurities in the saturator of an underwater vehicle. It is assumed that a bubble flow regime of a two-phase mixture with a monodisperse structure is implemented in the saturator to assess the effectiveness of the saturator in the first approximation. A mathematical model of the saturator, which is an integral element of the fuel processor of an air-independent power plant with an electrochemical generator for underwater objects based on convective and molecular diffusion, has been developed. It is established that it is required to determine the mass transfer surface consisting of the sum of the surfaces of all gas bubbles in the saturator volume. Calculations were performed using a mathematical model for three variants of liquid supply to the saturator volume, on the basis of which it was concluded that it is impossible to completely dissolve carbon dioxide in the saturator with a relative volume flow rate of one, therefore, a second stage of purification is required in the purification system – absorber.
Experimental determination of the static characteristics of welded vibration isolators used in shipbuilding
Authors: Титова Ю.Ф. , Яковлев С.Н. , Подкользина Л.В. , Коробицин А.А. , Поляхов Д.Н.
Published: December 2023

В работе приведено обоснование необходимости применения виброизоляторов с целью повышения ресурса и надежности механизмов. Целью работы является получение уточненной статической характеристики виброизоляторов типа АКСС (амортизатор корабельный сварной со страховкой) по трем направлениям, которая необходима для расчета частоты собственных колебаний системы «агрегат-виброизолятор». В работе представлены основы механизма демпфирования колебаний вязкоупругими материалами, в частности резиной, используемой для изготовления виброизоляционного массива. Кроме того, приведены основные типы виброизоляторов, применяемых в судостроении на сегодняшний день. В работе приведено описание нагружающего устройства для снятия статической характеристики виброизолятора и методики проведения экспериментального исследования в точном соответствии с ГОСТ 27242-87. Представлена эмпирическая зависимость по определению статической деформации виброизолятора в основном направлении от приложенной нагрузки и эмпирические зависимости для определения статической характеристики виброизолятора в зависимости от статической деформации по основному направлению. Проведенные экспериментальные исследования подтвердили величины статических жесткостей виброизолятора по трем взаимноперпендикулярным направлениям, в соответствии с ГОСТ 17053.1-80.

The paper provides a justification for the need to use vibration isolators in order to increase the resource and reliability of mechanisms. The aim of the work is to obtain a refined static characteristic of vibration isolators of the AKSS type (ship-mounted welded shock absorber with insurance) in three directions, which is necessary for calculating the frequency of natural oscillations of the "unit-vibration isolator" system. The paper presents the basics of the vibration damping mechanism by viscoelastic materials, in particular rubber, used for the manufacture of a vibration isolation array. In addition, the main types of vibration isolators used in shipbuilding today are given. The paper provides a description of the loading device for removing the static characteristics of the vibration isolator and the methodology for conducting an experimental study in strict accordance with GOST 27242-87. An empirical dependence is presented for determining the static deformation of a vibration isolator in the main direction from the applied load and empirical dependences for determining the static characteristics of a vibration isolator depending on the static deformation in the main direction. The conducted experimental studies confirmed the values of the static stiffness of the vibration isolator in three mutually perpendicular directions, in accordance with GOST 17053.1-80.
Evaluation of underwater vehicles telecommunication efficiency using information-measuring and control systems based on laser technologies
Authors: Мартынов В.Л. , Ясинская Ю.В. , Борисов А.Н.
Published: December 2023

Вопрос оценки эффективности телекоммуникаций подводных робототехнических комплексов при использовании информационно-измерительных и управляющих систем актуален всегда. Право выбора систем добывания и обмена информацией на подводных роботах принадлежит заказчикам, но, с учётом открывающихся возможностей, целесообразно оценить эффективность использования лазерных технологий для управления и обмена информацией между корреспондентами в гидросфере на базе соответствующей методики. В статье предложена и рассмотрена такая методика, состоящая из трёх основных этапов, в которых определяется оценка эффективности телекоммуникаций в гидросфере с применением лазерных технологий. На первом этапе определяется влияние двух основных составляющих ослабления светового потока: показателей рассеяния и поглощения. На втором этапе представлены графические зависимости этих величин от длины волны лазерного излучения. На третьем этапе методики показаны результаты определения зависимости дальности лазерного излучения в водной среде различной прозрачности от его интенсивности.

The problem of evaluating the underwater robotic telecommunication efficiency when using information-measuring and control systems is always relevant. The right to choose the systems of extraction and information exchange on underwater robots belongs to the customers, but, taking into account the opened opportunities, it is expedient to evaluate the efficiency of using laser technologies for control and information exchange between correspondents in the hydrosphere on the basis of the corresponding methodology. The article proposes and considers a methodology consisting of three main stages, in which the assessment of the efficiency of telecommunications in the hydrosphere using laser technology is determined. At the first stage, the influence of two main components of light flux attenuation is determined: scattering and absorption indices. The second stage presents graphical dependences of these values on the wavelength of laser radiation. The third stage of the methodology shows the results of determining the dependence of the laser radiation range in water medium of different transparency on its intensity.
Calculation of the rotation flow over flat solid surface in a mass forces field
Authors: Яковлев А.Ю.
Published: December 2023

По аналогии с задачей Кармана о течении над вращающимся диском, рассматривается задача Боддевата о вращении жидкости над твердой неподвижной плоской стенкой. В настоящее время известны расширенные постановки данной задачи с учетом специфических свойств жидкости и ее поведения на границах потока. В данной работе рассмотрена задача Боддевата с учетом действия в жидкости массовых сил произвольной природы, дополнительно учитывается возможность протекания жидкости сквозь стенку. Для расчета течения применен метод, разработанный ранее для решения аналогичной задачи над вращающимся диском. В данном случае было изменено направление интегрирования дифференциальных уравнений, что позволило получить осциллирующие решения задачи. Метод был оттестирован на примерах классической задачи Боддеватта, и ее расширенной постановки, в которой присутствует протекание жидкости через стенку. Подтверждено хорошее согласование результатов расчетов с этими решениями. Разработанный метод применен для исследования вращающегося течения над твердой стенкой, происходящего при одновременном действии тангенциальных массовых сил. Показано, что тангенциальные массовые силы существенно влияют на характер течения, приводя к торможению радиальной и осевой составляющей течения. В отсутствии вращения жидкости тангенциальные массовые силы приводят к формированию течения, подобного течению в классической задаче Кармана.

By analogy with the Karman problem of the flow over a rotating disk, the Boddevat problem of the rotation of a liquid over a solid stationary wall is considered. Currently, extended formulations of this problem are known, taking into account the specific properties of the liquid and its behavior at the flow boundaries. In this paper, the Boddevat problem is considered, taking into account the action of mass forces of arbitrary nature in the liquid, additionally taking into account the possibility of liquid flowing through the wall. To calculate the flow, a method developed earlier to solve a similar problem on a rotating disk is used. In this case, the direction of integration of differential equations was changed, which made it possible to obtain oscillating solutions of the problem. The method was tested on examples of the classical Boddevatt problem, and its extended formulation, in which there is a flow of liquid through the wall. The good agreement of the calculation results with these solutions is confirmed. The developed method is used to study the rotating flow over a solid wall occurring under the simultaneous action of tangential mass forces. It is shown that tangential mass forces significantly affect the nature of the flow, leading to deceleration of the radial and axial components of the flow. In the absence of fluid rotation, tangential mass forces lead to the formation of a flow similar to the flow in the classical Karman problem
Calculation of sound reflection characteristics on an elastic gas-filled cylindrical shell
Authors: Ильменков С.Л.
Published: December 2023

Представлено строгое решение задачи отражения стационарного звукового сигнала от бесконечной изотропной цилиндрической оболочки. В качестве заполнителя оболочки рассматривается газ, жидкость или полая упругая оболочка меньшего диаметра. Решение получено в рамках динамической теории упругости с использованием уравнения движения Ламе для изотропной среды, а также разложений упругих потенциалов и звуковых давлений по фундаментальным решениям уравнения Гельмгольца. Граничные условия относительно напряжений и смещений формулируются для каждой из поверхностей контакта оболочек с соответствующей средой. Подстановка разложений потенциалов в граничные условия позволяет получить системы алгебраических уравнений для нахождения неизвестных коэффициентов разложений и рассчитать значения звукового давления в отраженной волне. Вычислены и проанализированы частотные зависимости отраженного звукового сигнала для различных вариантов и параметров заполнения оболочки.

A rigorous solution of the problem of reflection of a stationary sound signal from an infinite isotropic cylindrical shell they presented. A gas, liquid, or hollow elastic shell of a smaller diameter we considered as a shell filler. The solution we obtained within the framework of the dynamic theory of elasticity using the Lame equation of motion for an isotropic medium, as well as decompositions of elastic potentials and sound pressures by fundamental solutions of the Helmholtz equation. Boundary conditions with respect to stresses and displacements they formulated for each of the contact surfaces of the shells with the corresponding medium. Substituting potential expansions into boundary conditions allows us to obtain systems of algebraic equations for finding unknown coefficients of expansions and calculate the values of sound pressure in the reflected wave. The frequency dependences of the reflected sound signal for various options and parameters of shell filling are calculated and analyzed.
Dampak Digitalisasi terhadap UMKM di Kota Jambi: Studi Deskriptif Kualitatif tentang Persepsi para Pakar dan Pelaku Usaha UMKM
Authors: Suroto Suroto
Published: December 2023

Digitalization has brought about significant changes in the business operational landscape at various levels, including SMEs. This research aims to explore the impact of digitalization on SMEs in Jambi City based on the perspectives of experts and SME business actors. Qualitative research methods were adopted in this study to provide in-depth insight into the impact of digitalization on SMEs. To collect accurate and quality data, this research relies on a Focus Discussion Group (FGD) with 6 experts and individual interviews with 22 SME business owners operating in various business sectors. This research approach follows the COREQ (Consolidated criteria for REporting Qualitative research) Checklist guidelines, which ensures the accuracy and superiority of research results. Data analysis was carried out using ATLAS.ti software which makes it possible to find, code, and manage data from FGDs and individual interviews more efficiently. The results of the analysis identified five main themes of the impact of digitalization on SMEs, namely: Improved Business Management, Marketing and Branding, Technology Challenges, Partnerships and Collaboration, and Customer Experience. It is hoped that this research will provide a better understanding of how digitalization has affected SMEs from various aspects, as well as illustrate the challenges that need to be overcome. The results of this research can be used as a basis or guideline for developing better strategies to support the growth and sustainability of MSMEs in the ever-developing digital era.
Assessing the Impact of Communication on Customer Relationship Marketing: A Case Study of Mobile Telecom Companies
Authors: Kalogiannidis Stavros , Chatzitheodoridis Fotios , Kalfas Dimitrios , Paschalidou Maria
Published: December 2023

The long-term relationship between customers and companies is essential for desired business growth. Most cellular industries rely on different forms of communication and marketing to achieve desired levels of relationships with their customers. This study focused on establishing the general effect of communication on customer relationship marketing in different businesses or organizations. The mobile telecom industry of Greece was used as the case study. A cross-sectional survey design based on a quantitative methodology was used in the study. A well-designed questionnaire was utilized to collect quantitative data from 204 customers of different mobile telecom companies based in Kozani, Greece. Results showed that communication techniques improve the strength of relationships between customers and the business, improving business profitability. The results also showed that the approach of communication in a company plays a very important role in influencing the satisfaction levels of customers which in the long run enhances relationship marketing. The findings confirmed that customer relationships through communication and marketing are essential for the growth of the business through improved performance and profitability. Therefore, companies or companies need to employ the best communication techniques to achieve the desired relationship marketing and sustainable long-term relationships.
Rancang Bangun Alat Monitoring Ketinggian Air Sawah Berbasis SMS Gateway Di Sawah Andiang
Authors: Aslam Nasyiith  , Jufrizel  , Hilman Zarory  , Putut Son Maria
Published: December 2023

Indonesia is an agricultural country where part of the population works in agriculture. Currently, the measurement of the water level of rice fields in Andiang rice fields still uses manual methods by placing restrictions on rice field irrigation then farmers check their condition periodically directly to the field. From this problem, some prototype is needed to do some monitoring from the condition of rice field waters and send notifications to rice field owners. The purpose of this research is to make a prototype that makes it easier for farmers to monitor the condition of rice field waters so that they do not experience overflow or drought. The method used is research and development to improve existing products by testing their effectiveness. This prototype utilizes HC-SR04 (ultrasonic sensor) as a water level reader and SMS Gateway as a platform in sending and receiving SMS (Short Message Service) from mobile phones. The result of this research is that this prototype is able to monitor the water level of rice fields in Andiang Rice Fields.
Evaluating the Accounting Treatment of Value-Added Tax (VAT) at PT. Aneka Ragam Eng
Authors: Abdullah Mhd , Masyitah Emi
Published: December 2023

Tax compliance is the fulfillment of tax obligations carried out by taxpayers to fulfill their responsibilities to achieve state development goals. PT. Aneka Ragam Eng is a manufacturing company operating in the field of Engineering, Construction & Manufacturing which is located at Jl. Palembang No. 35, Ex. Downstream Clever. The purpose of this research is to find out the causes of problems in evaluating the accounting treatment of Value Added Tax (VAT), to find out the obstacles faced, and the efforts made by PT. Aneka Ragam Eng on the evaluation of the accounting treatment of VAT. This research approach uses a descriptive approach and uses qualitative methods. Data management resulting from this research uses the Nvivo application. The accounting treatment for VAT in the company is in accordance with the Tax Harmonization Law No. 7 of 2021. After carrying out calculations, it is known that in the 2022 period the company experienced an underpayment of SPT because the output VAT was greater than the input VAT, this was caused by customer delays in paying bills. Apart from that, purchasing small amounts of materials or raw materials is also an obstacle faced by companies. The efforts made by the company to minimize the problems that occur are by ensuring customers pay their bills and following up on customer bills.
Assessment of the Influence of Cell Technologies on Denervation-Reinnervation Processes in Muscles after Gunshot Injury Using Shear Wave Elastography (SWE)
Authors: Dolhopolov O.V. , Zinchenko V.V. , Yarova M.L. , Siforov D.V. , Haiko O. G. , Klymchuk L.I. , Luchko R.V.
Published: December 2023

Objective. The purpose of this article is to determine the feasibility of using shear-wave elastography (SWE) in assessing the influence of cell technologies on denervation-reinnevaration processes in the muscles of gunshot injury.

Material and Methods. Ultrasound examination and elastography were performed on a GE Healthcare LOGIQ P9 device with a 5-12 MHz multi-frequency probe. 19 injured males aged 35-57 (average age 45.31±0.95 years) with denervation-reinnervation processes in muscles due to gunshot damage were examined. The examination was performed on the affected limb and on the contralateral healthy limb. Statistical processing was performed using Microsoft Excel and StatSoft Inc. STATISTICA.

Results: 11 patients with lesions of the radial nerve on the upper limb and 8 people of the peroneal nerve on the lower leg were included in the study. With lesions of the radial nerve, we examined m. extensor digitorum on the forearm. For lesions of the peroneal nerve, m. tibialis anterior of the lower leg was chosen. After the examination, all patients underwent the procedure of injecting BMAC (Bone Marrow Aspirate Concentrate) into the target muscle. Control studies of shear wave elastography were performed again one month after the procedure. The obtained statistical data on the state of muscle stiffness in dynamics allow us to conclude about the reliably positive outcome of the treatment.

Conclusions. Ultrasound of muscles with shear wave elastography is a reliable and innovative method of obtaining information about the state of muscle stiffness when assessing the influence of cellular technologies on denervation-reinnervation processes in patients after gunshot injuries.
Agrarian Issues in the Indonesian State: Case Study of MA Decision Number 777.Pk/Pdt/2019 and Legal Protection for Landowners
Authors: Qadarisman Khairil , Fuad Fokky , Rifai Anis
Published: December 2023

This research discusses agrarian problems that occur in Sikayah Negara Indonesia with a focus on the case study of the Supreme Court Decision Number 777.pk/Pdt/2019 and examines the legal protection given to landowners. The background to this problem comes from the agrarian conflicts that are often faced by landowners, where their ownership rights are threatened. The research method used is normative legal research with a case study approach. The collected data was analyzed qualitatively to identify emerging agrarian problems, analyze the methods used in the case studies, and evaluate the legal protection given to landowners. The results of the research show that the case study of the Supreme Court Decision Number 777.pk/Pdt/2019 involves conflicts between landowners and other parties who also claim the same land rights. The methods used include document analysis, case discussion, and legal assessment. Based on the research results, it can be concluded that legal protection for landowners in the context of agrarian problems in Sikayah Negara Indonesia is still not optimal. There are weaknesses that need to be fixed in legal policy and law enforcement to ensure better protection of land ownership rights and the interests of landowners. In order to improve this situation, further efforts are needed to improve relevant legal policies, strengthen law enforcement, and provide fair and effective protection for landowners. This will ensure the realization of balanced agrarian justice and adequate protection of the rights of landowners in the Sikayah Indonesia Country.
The Influence of Visual Appeal and Perceived Enjoyment on Brand Loyalty Through Customer Trust for Shopee Users in Yogyakarta
Authors: Winarti Adriana , Ningrum Nonik Kusuma , Maharani Bernadetta Diansepti
Published: December 2023

Facing increasingly fierce competition, one of the main strategies is to increase customer loyalty. Customers are the lifeblood of a business, because from customers a business gets income. Customer loyalty is the tendency for customer attitudes and behavior to favor one brand over another. Loyal ones will show an attitude of wanting to maintain relationships with service providers, such as a willingness to provide contact numbers, receive information/promotions, or provide recommendations. The population in this study were all students using Shopee in Yogyakarta. The sampling technique was purposive sampling with a sample size of 130 people. Data collection was carried out using questionnaires and data analysis in this research used Smart PLS. The influence of visual appeal, perceived enjoyment and customer trust is stated to be positive and significant because the original sample value obtained is positive and the p value is <0.05. The test results using the PLS approach produced a coefficient value for the influence of visual appeal on brand loyalty through customer trust with a value of 1.809 (p value 0.070 > 0.05), so it can be concluded that visual appeal has no effect on brand loyalty through customer trust. The test results using the PLS approach produced a coefficient value for the influence of perceived enjoyment on brand loyalty through customer trust with a value of 3.742 (p value 0.000 < 0.05), so it can be concluded that perceived enjoyment has a positive and significant effect on brand loyalty through customer trust.
The Use of Informal Affixation in Social Media Threads as Teaching Material for Indonesian Language in High School
Authors: Fauziah Rohadatul Aisy Agung , Wahyudi Agus Budi
Published: December 2023

This research focuses on informal forms of affixation on social media threads. The aims of this research are (1) to describe forms of informal affixation, (2) to describe the implementation of research results on informal affixation on social media threads as an alternative teaching material in high school. This type of research is qualitative descriptive research which aims to describe forms of informal affixation. The data in the research are all words that contain informal affixations on Threads social media. Data collection techniques use documentation, reading, listening and note-taking techniques. The results of this research show that there are two types of informal affixations on the objects studied, namely first, informal verb-forming affixations in the form of the suffix -an, suffix -in, prefix ke-, combination di-in. Second, the informal affixation that forms adjectives is in the form of the affix -an and the affix -an. Third, implementation of research data in news text teaching materials in high school with Learning Outcomes (CP) where students are able to write ideas and thoughts in news texts with clear and neat writing paying attention to appropriate punctuation.
An Exploratory Study on Integrating the Christian Faith in an Online Master of Social Work (MSW) Program Curriculum
Authors: King David , Buchanan Toby
Published: December 2023

Social work curricula frequently lack the inclusion of Religion, Faith and Spirituality (RFS). While faith and religious beliefs are often connected with professional calling, values, and practice, the integration of faith and social work practice is uncommon. This research explored the experiences of students in a Master of Social Work (MSW) program that integrated Christian faith throughout the curriculum and its effects on their spiritual understanding, development, and identity. A qualitative study of student responses was completed to gain insight into the impact of the curriculum on students’ spiritual growth, understanding, and views regarding the ethical integration of Christian faith and practice. The research findings confirmed the value of faith integration in social work education and helped inform the development of more effective curricula in faith-based settings. The results of this study may benefit other evangelical Christian universities seeking to increase students’ personal growth in faith as well as competencies and ethical practices as social workers.

Keywords: Faith Integration, Christian Higher Education, Spirituality, Social Work
Parenting and Learner Support in Rural South African Schools: Home Involvement as a Conduit for Strengthening Home-School Partnership
Authors: Maqoqa Thabisa , Molepo Maisha J. , Kariyana Israel
Published: December 2023

For the delivery of effective and quality education, active parent participation regarding learning support both in schools and at home is crucial. The study, hinged on Bronfenbrenner’s Ecological Model sought to analyse School Management Teams (SMTs) and parents’ views on and interpretations of parental school involvement. Interviews were used to collect data from fifteen (15) purposively selected participants from three Junior Secondary Schools in the OR Tambo Coastal District in the Eastern Cape Province. The data was analysed using Atlas. ti and presented thematically and through network diagrams. The findings revealed that while parents were valued stakeholders in schools, there was a lack of viable partnerships between parents and schools. It emerged that effective home-school partnership was hindered by communication challenges as most parents were illiterate, hence children received minimal learning support from home. The low socio-economic status of the parents drove them towards tilling their land to provide food rather than actively participating in school activities. It was concluded that while parents had a clear and consistent understanding of parental involvement in school activities, the high poverty diminished their motivation for school involvement. Recommendations include the need for the Department of Education to foresee that school governing bodies ensure collaboration between homes and schools. Also, there should be intervention programs to enhance active parental participation in schools. This study adds to the existing literature on inclusive education in South African schools. Keywords: Effective Education, Quality Education, Parent Participation, Team Spirit, Learner Performance.
Global MHD Simulations of the Time-dependent Corona
Authors: Lionello Roberto , Downs Cooper , Mason Emily I. , Linker Jon A. , Caplan Ronald M. , Riley Pete , Titov Viacheslav S. , DeRosa Marc L.
Published: December 2023

We describe, test, and apply a technique to incorporate full-Sun, surface flux evolution into an MHD model of the global solar corona. Requiring only maps of the evolving surface flux, our method is similar to that of Lionello et al., but we introduce two ways to correct the electric field at the lower boundary to mitigate spurious currents. We verify the accuracy of our procedures by comparing to a reference simulation, driven with known flows and electric fields. We then present a thermodynamic MHD calculation lasting one solar rotation driven by maps from the magnetic flux evolution model of Schrijver & DeRosa. The dynamic, time-dependent nature of the model corona is illustrated by examining the evolution of the open flux boundaries and forward-modeled EUV emission, which evolve in response to surface flows and the emergence and cancellation flux. Although our main goal is to present the method, we briefly investigate the relevance of this evolution to properties of the slow solar wind, examining the mapping of dipped field lines to the topological signatures of the “S-Web” and comparing charge state ratios computed in the time-dependently driven run to a steady-state equivalent. Interestingly, we find that driving on its own does not significantly improve the charge state ratios, at least in this modest resolution run that injects minimal helicity. Still, many aspects of the time-dependently driven model cannot be captured with traditional steady-state methods, and such a technique may be particularly relevant for the next generation of solar wind and coronal mass ejection models.
Polarization of Intrabinary Shock Emission in Spider Pulsars
Authors: Sullivan Andrew G. , Romani Roger W.
Published: December 2023

In so-called spider pulsars, the X-ray band is dominated by intrabinary shock (IBS) synchrotron emission. While the double-peaked X-ray light curves from these shocks have been well characterized in several spider systems (both black widows and redbacks), the polarization of this emission is yet to be studied. Motivated by the new polarization capability of the Imaging X-ray Polarization Explorer and the confirmation of highly ordered magnetic fields in pulsar wind nebulae, we model the IBS polarization by employing two potential magnetic field configurations: toroidal magnetic fields imposed by the preshock pulsar wind, and tangential shock-generated fields that follow the postshock flow. We find that if IBSs host ordered magnetic fields, the synchrotron X-rays from spider binaries can display a high degree of polarization (≳50%), while the variation in polarization angle provides a good probe of the binary geometry and the magnetic field structure. Our results encourage observational polarization studies of spider pulsars that can distinguish the proposed magnetic models and that constrain the unique properties of these systems better.