bluuebunny/crossref_metadata_2025 huggingface dataset:
THE EFFECT OF SOSIAL MEDIA INFLUENCE, CONTENT MARKETING, AND E-WOM TOWARDS ONLINE PURCHASE DECISIONS IN MATARAM CITY
Authors: Hidayat Surahman , Suardana I Made , Dewi Nami Khatina
Published: January 2024

This study aims to examine the Influence of Social Media Influencers, Content Marketing, and Electronic Word Of Mouth on online purchasing decisions in Mataram City. So that the variables in this study consist of 3 (three) independent variables, namely Social Media Influencers (X1), Content Marketing (X2), and Electronic Word Of Mouth (X3) and 1 (one) dependent variable, namely purchase decision (Y). Samples are taken using purposive sampling. The data collection technique in this study was using a questionnaire. Data obtained using questionnaires as many as 80 respondents. The data were analyzed using SPSS multiple linear regression test. The results of this study show that Social Media Influencers do not have a significant effect on purchasing decisions, while Content Marketing and Electronic Word Of Mouth have a significant influence on purchasing decisions. The results of the f (simultaneous) test variables Influencer social media, Content Marketing, and Electronic Word Of Mouth influence simultaneously (together) on purchasing decisions, while in the determination test obtained R square which means that the 3 independent variables have an influence of 53.3% of the dependent variables while the remaining 46.7% of variables are not included in this study.
ANALYSIS OF EFFICIENCY AND ELASTICITY OF LABOR ALLOCATION IN MANUFACTURING INDUSTRY IN INDONESIA
Authors: Nababan Tongam Sihol , Panjaitan Raya , Panjaitan Ferry , Sihombing Eriko , Nopeline Nancy
Published: January 2024

AbstractThe purpose of this study is to analyse the level of efficiency and elasticity of the large and medium manufacturing industry sector during 2012 - 2020 in the Indonesian Standard Industrial Classification (ISIC) 2-digit level (major groups 10 to 33), consisting of 24 types of manufacturing sub-industries. In this study, the Cobb-Douglas production function model with linear logarithmic was used to analyse the manufacturing efficiency index. The results showed that: (1) during the period 2012-2020, the production efficiency of the 2-digit ISIC sub-sector (24 sub-sectors) increased on average by 445% or 4. 45 times, (2) all the output elasticity values of the 2-digit ISIC subsector (24 subsectors) were less than one (EL < 1), which showed that the marginal value added of labour was lower than the average value added of labour, so that the additional allocation of labour in large and medium-sized industries tended to reduce the average value added of labour, (3) the highest efficiency index in order were ISIC 26 (computer, electronic and optical products), ISIC 17 (paper and paperboard), ISIC 18 (electrical machinery and equipment), ISIC 19 (machinery and equipment) and ISIC 20 (machinery and equipment); ISIC 17 (paper and paper products); ISIC 31 (furniture) and ISIC 29 (motor vehicles, trailers and semi-trailers).
THE INFLUENCE OF TRAINING, DISCIPLINE AND FACILITIES ON SATISFACTION AND ITS IMPACT ON THE PERFORMANCE OF STATE CIVIL APPARATUS IN THE REGIONAL SECRETARIAT OF MEDAN CITY
Authors: Panjaitan Ferry , Sianipar Lasma Lenida , Gultom Priska
Published: January 2024

This research was conducted in the Medan City regional secretariat environment, where this research is quantitative descriptive research, which explains training, discipline, facilities, satisfaction, and performance. This research also tests the relationship between these variables directly and indirectly. The population in this study were all employees at the Medan City Regional Secretariat, totaling 205 people spread across 12 work units. The total research sample was 68 people, determined using the Slovin (2001) formula with an error rate in sampling of 10%. The list of questions in this research was first tested for validity and reliability, the data was processed with the help of the SPSS version 25 program. The results of this research show that Training, discipline, and satisfaction have a positive and significant influence on performance, while Facilities do not have a significant influence on the performance of the City Regional Secretariat ASN Medan. Training, discipline, and facilities partially do not have a significant effect on the job satisfaction of ASN of the Medan City Regional Secretariat. For testing the path analysis, it shows that the training, discipline, and facilities variables both have no significant effect on performance through job satisfaction of ASN of the Medan City Regional Secretariat.
ANALYSIS OF MSME BUSINESS PERFORMANCE IN THE ERA OF INDUSTRIAL REVOLUTION 4.0: CASE STUDY ON MSME IN THE CULINARY SECTOR
Authors: Setyawati Amelia , Mustikarini Carolina Novi , Kusuma Rr. Chusnu Syarifa Diah , Seseli Eka Merdekawati Imelda
Published: January 2024

Implementing innovation by MSME actors can be done by improving the quality of products or services, for example, by improving the production process or using more efficient technology to increase productivity and business effectiveness. The research aims to analyze the influence of innovation capability and technological innovation on business performance. The sample in this study consisted of 90 respondents from MSME actors in the culinary sector in Indonesia who were determined using a convenience sampling approach. Data collection uses a questionnaire instrument which is then distributed online. Data analysis uses the SPSS application by displaying data processing results through testing research instruments with validity and reliability tests, multiple regression analysis, coefficient of determination and hypothesis testing. Based on the results of data analysis, it is stated that innovation capability and technological innovation have a positive and significant effect on business performance. The research implications suggest that this research provides theoretical insights and practical views that can help MSMEs in the culinary sector in making strategic decisions. The implications of this research can help MSMEs improve their innovation capabilities, optimize the use of technology, and ultimately improve their overall business performance.
EXISTENCE OF ORGANIZATIONAL CITIZENSHIP BEHAVIOR OF MILLENNIAL EMPLOYEES IN THE ERA OF INDUSTRIAL REVOLUTION 4.0 USING A QUANTITATIVE APPROACH
Authors: Romi Mochamad Vrans , Waliah Siti , Hasanuddin Bakri , Sriharyati Santy
Published: January 2024

In the context of the Industrial Revolution 4.0, the existence of Organizational Citizenship Behavior (OCB) of millennial employees is becoming increasingly relevant, and understanding of this phenomenon can be broadened by considering two important aspects: servant leadership and work-life balance. Servant leadership, emphasizing service and individual empowerment, motivates millennial employees to play an active role in positively contributing to the organization. The research aims to analyze the influence of servant leadership and work-life balance on organizational citizenship behavior. The sample in this study consisted of 160 millennial employee respondents who worked in the creative industry sector, determined using a convenience sampling approach. Data collection uses a questionnaire instrument, which is then distributed online. Data analysis uses the SPSS application by displaying data processing results through testing research instruments with validity and reliability tests, multiple regression analysis, coefficient of determination, and hypothesis testing. Based on the results of data analysis, it is stated that servant leadership and work-life balance have a positive and significant effect on organizational citizenship behavior. The research implications stated by reviewing it from the perspective of servant leadership and work-life balance significantly impact human resource management practices and organizational development.
Memahami Syariat Poligami secara Holistik Berdasarkan Al-Quran dan Hadis
Authors: Fatah Muhammad
Published: January 2024

Polygamy is one of the marriage practices permitted in Islam. However, this practice often sparks controversy, both legally, socially, and culturally. This is due to various factors, including differences in understanding the polygamy Sharia and the existence of negative perceptions towards polygamy. This research aims to comprehend the polygamy Sharia holistically based on the Quran and Hadith. This goal is achieved by deeply examining Quranic verses and hadiths related to polygamy, as well as reviewing various opinions of scholars on polygamy. The research employs a qualitative method with a literature study approach. Data is obtained through a comprehensive study of the Quran, Hadiths, and relevant literature on polygamy. The results of the research indicate that the polygamy Sharia has noble objectives, namely to fulfill biological, social, and emotional needs of humans. However, the polygamy Sharia also has several conditions and provisions that must be met to be implemented properly and avoid negative impacts.
Biyosistem Mühendisliği V
Authors: Giray Aslı , Altun Sevda , Kirmikil Müge , Yaslıoğlu Erkan , Mehdiyev Kamran , Yaslıoğlu Erkan , Bayraktar Aytül , Sesveren Sertan , Eren Merve Nur , Akyüz Adil , Çaylı Ali , Değirmenci Hasan , Arslan Fırat , Polat Musa , Boyacı Sedat , Ulusoy Ayşe , Ertop Hasan , Şirin Murat Alper , Tezcan Nefise Yasemin
Published: January 2024

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Resource Recovery from Crude Oil Sludge Using Solvent Extraction and Delayed Cooking Method
Authors: Okorie Lilian Chigozie
Published: January 2024

The main objective of this work is to make an economically useful recovery from waste. Crude oil sludge is gotten from the bottom of crude oil storage tank. 100mI (109.2g) of crude oil sludge when treated with 50mI, 100mI, 200mi……400 ml of solvent heptane resulted in the formation of three different layers. The first layer contains the solvent and some extracted crude oil in the oil phase. This is distilled to get different hydrocarbon fractions. The second layer is asphaltic residue which when furnace treated and activated or washed and neutralized with inclusion of additives yields activated coke used as adsorbent and newsprint paste respectively. The third layer is the mud or clay which could be furnace treated to produce activated clay.Results show that petroleum coke is best activated at 800°C and the optimal condition for bleaching red palm oil by the adsorbent is at 130•C.
Safety, Health and its Relation to Reliability with Emphasis on Root Cause Analysis
Authors: Marcus Imowo
Published: January 2024

Accidents are negative events with threatening overtones. At the minimum, people involved in an accident or near loss may feel self-conscious and under scrutiny. Accidents also carry with them the probability of personnel injury, claims, loss of life’s, damage to products or equipments, installation, uninsured and insured costs and enforcement actions by statutory agencies. When incidents occur, it is important that the appropriate tool and techniques are applied to ensure a significant contribution to the efficiency and effectiveness of the investigation process. This research work presents an overview of these techniques and their uses from a contrasting perspective. Tools such as root cause analysis, sequencing methods and methods for hypothesis formulation aid the investigator(s) in the investigation. These tools facilitate team working, identifying and communication of findings, management of complex investigations and the transparency of the investigation. They also add to the confidence of stake holders in an investigation and to its efficiency. The various techniques employed in incident investigation have their distinctive functions and limitations and thus they are applied to relevant situations. The root cause analysis techniques can improve the effectiveness of an investigation by ensuring a wide scope and depth of enquiry while sequencing tools allow the investigator(s) to create an externalised model of the events under inquiry and this helps as it directly probes the areas of uncertainty.
An Exploration of Critical Success Factors for Lean Project Management in the Upstream Petroleum Industry in Ghana
Authors: Ayanaba J , McLellan I , Kourouklis T , Cano M , Aka R. O
Published: January 2024

Lean project management is quickly gaining acceptance in a variety of industries. The problem is despite the discovery of oil and subsequent exploration, Ghana has always been a net importer of crude oil, petroleum products, and natural gas. Given that lean management implementation inures to better performance and cost efficiencies, this study sought to ascertain the state of lean project management implementation in the upstream petroleum industry using Ghana as a case of an emerging economy context.Employing a Delphi style methodology by seeking experts’ opinions in the upstream sector of Ghana’s petroleum industry, the study found that even though lean project management implemented to an extent within the sector, its implementation is fraught with challenges such as low leadership to drive the lean process, management, and planning for the entire process. Experts in the field gave opinions as to the key considerations for successful implementation of lean project management in the upstream sector and the study recommended that lean project management should be emphasized more in the petroleum sector for higher performance that may inure to the country being a net exporter instead of a net importer of crude products.The study recommends strong leadership teams for the upstream sector to lead lean implementation with adequate training on lean project management provided to all staff for increased commitment and effective implementation that engenders a lean culture in the sector.
Effect of Health Education Intervention Programme on Awareness of Danger Signs in Childhood Illnesses (Under-Five) Among Caregivers in Kaduna State, Nigeria
Authors: Bello Yusuf , Musa Umaru , Nurudeen Akorede Seun , Biu Adamu Abdulkareem , Getso Ahmad Sani
Published: January 2024

: The study assesses the effect of health education intervention programme on awareness of danger signs in childhood illnesses (Under-Five Children) among caregivers in Kaduna State. Nigeria. To achieve the purpose of the study, five research questions were raised while five hypotheses were formulated and tested to guide the study. Quasi-experimental of pre-test and post-test experimental and control groups was adopted for this study. The population of the study consist of 19,684 of the entire caregivers in Kaduna State. The sample size of this study is two hundred (200) participants selected by using multi-stage sampling techniques. The instrument for data collection for the study is researcher’s developed questionnaire. Inferential statistic of paired sample t-test was used to test the formulated hypotheses at 0.05 level of significance. The finding indicated that there is significance awareness of danger signs in childhood illnesses (Under-Five Children) among caregivers in Kaduna state, Nigeria after health education intervention programme (t-23.07, df: 99; P=.000); and there is significant difference between the experimental and control group after health education intervention programme based on their awareness of danger signs in childhood illnesses (t=-15.316, df: 198; (P=.000). Based on the findings of the study it was concluded that health education intervention programme improves awareness of danger signs in childhood illnesses (Under-Five Children) among caregivers in Kaduna state, Nigeria. This is because the effect of health education intervention programme was significant. It was therefore recommended among others that the Kaduna State Ministry of Health should work with all the healthcare facilities to promote that health education intervention programme on knowledge of danger signs in childhood illnesses and should be carried out during ANC visits.
Enduring Intimate Partner Violence in Marriage: Myths and realities
Authors: Ubelejit-Nte Adaku A. , Nwakanma Emmanuel
Published: January 2024

This paper investigates IPV experiences of women in Nigeria, and the reasons women hold to justify enduring IPV in marriage. The objectives of the study include assessing the role of the state, culture and religion in intimate partner violence, and evaluating the relationship between societal level biases and enduring IPV in marriage. The study employed a cross-sectional survey design involving 400 respondents selected from different states in Nigeria using non-probability sampling. Both qualitative and quantitative techniques were used for data collection. Data were evaluated using univariate and bivariate analysis. At the univariate level, descriptive statistics were used to analyse variables like the socio-demographic information of the respondents while chi-square was employed to test hypothesis. Findings show that, at p-value of .0256 (p < .05), societal level biases and cultural and religious ideals about marriage are positively linked to women’s acceptance and endurance of IPV. The study also revealed that women elect to endure IPV in marriage owing to the stigma attached to failed marriages; lack of finance and responsibility to children, inter alia. Furthermore, 70.5% of the respondents indicated that it is expected of a woman to endure IPV in marriage as it is contrary to cultural and religious injunctions to leave a marriage, even if it is abusive. The study thus recommends the need to develop a protective environment for women against societal, cultural and religious ideals. Vulnerable women should be able to access unrestricted legal support when opting out of an abusive marital relationship. Most importantly, beliefs that compel women to endure IPV in marriage should be abolished.
The Quest for Solidarity in a Failed Prescriptive and Aspirational Cosmopolitanism: African Travel Narratives and Duality of Cross-Cultural Encounters
Authors: Munyangeyo Théophile
Published: January 2024

The theme of travel has occupied a central position in African literature, as it serves as a conduit for exploring the complexities of cross-cultural interactions and the pursuit of solidarity. Within colonial and early post-colonial novels, authors have portrayed many challenges of physical and introspective journeys as reflections of failed solidarity. In this vein, travel narratives in African literature challenge the notion of solidarity as an idealistic aspiration. Using Historical and Cultural Context method with references to Reader-Response Theory, this study sheds light on the complexities and consequences of failed solidarity encounters. The findings reveal that cosmopolitan ideals, whether prescriptive or aspirational, cannot bridge the gaps caused by social, economic, and political disparities without acknowledging and addressing power imbalances and structural inequalities between nations and communities. This study offers insights into alternative pathways to genuine and transformative solidarity, ultimately contributing to a pragmatic understanding of borderless cosmopolitan ideals.
Exploración Integral de Competencias Socioemocionales y Ciudadanas en el Desarrollo Humano
Authors: Mosquera Vergara Tatiana Paola
Published: January 2024

Esta investigación se centra en la integración sinérgica de competencias socioemocionales en el desarrollo humano, explorando su intersección crítica para comprender el crecimiento y la adaptabilidad de los individuos. Utilizando un enfoque cualitativo documental, se identifican patrones y dinámicas que revelan la interacción mutua de estas competencias a lo largo del tiempo. La investigación destaca la importancia fundamental de las competencias socioemocionales en la toma de decisiones, resolución de problemas y bienestar emocional. El objetivo principal del estudio es, comprender cómo estas competencias se entrelazan y potencian mutuamente, contribuyendo al crecimiento holístico. El análisis documental incluyó estudios psicológicos, informes educativos y literatura especializada centrada en competencias socioemocionales. Los resultados indican patrones recurrentes de sinergia entre estas competencias, demostrando que el desarrollo de una está vinculado al fortalecimiento de la otra. Se identifican factores que influyen en esta integración, como entornos educativos, experiencias de vida y estrategias pedagógicas. Las conclusiones resaltan la necesidad de abordar estas competencias de manera conjunta en programas educativos y estrategias de desarrollo personal, reconociendo su influencia recíproca. Este enfoque integrador promete mejorar la calidad de la educación y fomentar un desarrollo humano más completo y resiliente más, cuando existe una profunda problemática en valores Humanos y sociales.
An Approach to the State of the art of Variational Thought in First Grades of Schooling
Authors: Díaz Fernández Lina Marcela
Published: January 2024

This paper presents a retrospective and documentary study on elements associated with variational thinking, with the purpose of establishing how variational thinking has been developed in children in the first grades of school from the approach of TO. First, a review is made of some of the central categories for the Theory of Objectification (TO), with the purpose of analyzing subsequent research. Then, the main research developed on variational thinking in the early grades of schooling is described, from a Colombian and international perspective. Subsequently, some elements that are considered important to be considered in future research are proposed, in the light of the TO categories. Finally, some elements are proposed that show the importance of studying variational thinking from the early grades of schooling, as well as some elements to consider for such a study.
Deconstrucción del Tipo Penal Posesión Mínima de Droga y la Afectación de los Principios de Razonabilidad y Proporcionalidad, Chimbote 2022
Authors: Sara Alvarez Blas de Aroni , Contreras Horna Richard Fermín
Published: January 2024

El Titulo de esta investigación es “Deconstrucción del Tipo Penal Posesión Mínima de Droga y la Afectación de los Principios de Razonabilidad y Proporcionalidad, Chimbote 2022”. El Objetivo General es “Determinar en qué medida la sanción por posesión mínima de dos o más tipos de drogas para el inmediato consumo, vulnera los principios de proporcionalidad y razonabilidad en la tipicidad penal del art. 299 del CP, Chimbote 2022, utilizamos el tipo de investigación básica exegética, con un enfoque mixto, los principales métodos son el dogmático jurídico, comparativo, de análisis síntesis, histórico y exegético, le técnica que se utilizó es la encuesta a operadores del derecho y el análisis documental. Los resultados reflejan que más de la mitad de los encuestados, está en desacuerdo que se mantenga la sanción para los que posean dos o más tipos de drogas para su inmediato consumo, ya que eso no fortalece la lucha contra ese delito, debiendo aplicarse el principio de mínima intervención, además que no es proporcional ni razonable, descartándose de esta manera la hipótesis nula, corroborándose los resultados con coeficiente de Alfa de Cronbach, lo cual significa que el instrumento es confiable.
Pola Komunikasi Customer Service Dalam Menangani Komplain Pelanggan (Studi Pada PT. Inti Tama Karsa, Jakarta)
Authors: Ilona Vicenovie Oisina Situmeang
Published: January 2024

Pelayanan  yang  baik  erat  kaitanya  dengan  keberhasilan  perusahaan  dalam  memenuhi  kepuasan  konsumen,  perusahaan  harus  bisa  mengembangkan  kerjasama  dengan  konsumen  dalam  penyampaian  layanan  yang  prima. Aspek  pelayanan  sangat  penting  bagi  berkembangnya  bisnis.  Pelayanan merupakan  peran  dari  customer  service    berhubungan  langsung  dengan  pelanggan. Pertanyaan  penelitian  adalah:  “Bagaimana  Pola  Komunikasi   Customer  Service  dalam  Menangani  Komplain  pelanggan  (Studi  Pada  PT Inti Tama Karsa, Jakarta). Penelitian ini menggunakan Model komunikasi Dua Arah, menggunakan konsep Komunikasi Interpersonal, Pola Komunikasi, Customer Service, Komplain Pelanggan, Penanganan Komplen. Menggunakan pendekatan penelitian Kualitatif dan sifat penelitian deskriptif. Customer Service menetapkan Pola Komunikas customer service dalam menangani komplain pelanggan, dimulai mengenal dan memahami karakter pelanggan, menyusun pesan yang disampaikan ke pelanggan, menetapkan cara menerima keluhan sampai menyelesaikan keluhan pelanggan dan melakukan follow-up kepada pelanggan.  Adapun keluhan yang disampaikan pelanggan.
Simulation of the behavior of a spherical object during seismic activity of the core
Authors: Спорыхин А.Н. , Щеглова Ю.Д.
Published: January 2024

В работе на основе реологических моделей сложных сред упруговязкопластической дилатирующей и несжимаемой упруговязкопластической, а также классической несжимаемой идеально пластической среды определено напряженно-деформированное состояние сферического тела при постоянной внешней и динамической внутренней нагрузках. Исследовано осесимметричное состояние тела. Определены поля перемещений и напряжений в упругих и пластических областях. Ключевые слова: напряжение, перемещение, упругость, пластичность, вязкость, дилатансия, осесимметричное состояние.

Based on the rheological models of complex media of an elastoviscoplastic dilating and incompressible elastoviscoplastic, as well as a classical incompressible ideally plastic medium, the stress-strain state of a spherical body is determined under constant external and dynamic internal loads. The axisymmetric state of the body is studied. Displacement and stress fields in elastic and plastic regions are determined. Keywords: stress, displacement, elasticity, plasticity, viscosity, dilatancy, axisymmetric state.
Elastic-plastic torsion of a multilayer rod
Authors: Сенашов С.И. , Савостьянова И.Л.
Published: January 2024

Исследуется упруго - пластическое кручение многослойного стержня. Стержень состоит из нескольких слоев. Упругие свойства слоев различны, но коэффициент пластичности у всех слоев одинаков. Для простоты в статье рассмотрен стержень, состоящий из трех слоев. Границы контакта слоев параллельны. Боковая граница стержня свободна от напряжений, на границах раздела слоев непрерывны напряжения и перемещения. В статье построены законы сохранения, которые позволили вычислить компоненты тензора напряжений с помощью контурных интегралов по границе слоев. Во всех точках второй инвариант тензора напряжений сравнивается с пределом текучести. В тех точках, где достигается предел текучести при чистом сдвиге, реализуется пластическое состояние, в остальных – упругое. В результате решения задачи можно построить границу между пластической и упругой областями. Этот метод позволяет построить упруго-пластические границы для стержней различных профилей. Авторы сделают это в последующих публикациях.

The authors investigate the elastic-plastic torsion of a multilayer rod in this article. According to the condition of the problem, the rod consists of several layers. The elastic properties of the layers are different, but the plasticity coefficient of all layers is the same. For simplicity, the article considers a rod consisting of three layers. The contact boundaries of the layers are parallel . The lateral boundary of the rod is stress-free, stresses and displacements are continuous at the interface of the layers. The authors constructed conservation laws that made it possible to calculate the components of the stress tensor using contour integrals along the boundary of the layers. At all points, the second invariant of the stress tensor is compared with the yield strength. At those points where the yield strength is reached with a pure shear, a plastic state is realized, in the rest – elastic. As a result of solving the problem, it is possible to construct a boundary between the plastic and elastic regions. This method makes it possible to construct elastic-plastic boundaries for rods of various profiles. The authors will do this in subsequent publications.
On determining the position of the neutral line in the case of extremely elastic bending of multilayer physically nonlinear concrete rods
Authors: Немировский Ю.В. , Тихонов С.В.
Published: January 2024

В данной работе рассматривается задача изгиба многослойного стержня поперечными нагрузками при наличии зон упругого и нелинейно-неупругого деформирования, получены соотношения для определения границы раздела упругой и нелинейно-неупругой областей деформирования стержня, а также получены численные расчеты для случаев совпадения и не совпадения нейтральной линии с осью стержня. Приведены численные расчеты предельных нагрузок: первой (деформация достигает значения предельной неупругой) и второй (деформация достигает значения деформации предразрушения).

This paper considers the problem of bending a multilayer rod under transverse loads in the presence of zones of elastic and nonlinear-inelastic deformation, and relations are obtained to determine the interface between the elastic and nonlinear-inelastic deformation regions of the rod. The resulting numerical calculations for cases of coincidence and non-coincidence of the neutral line with the axis of the rod. Numerical calculations of the limiting loads are presented: the first (the deformation reaches the limiting inelastic value) and the second (the deformation reaches the value of the pre-fracture strain).
Experimental study of elastoplastic deformation structural materials on an automated testing complex SN-EVM
Authors: Гультяев В.И. , Булгаков А.Н.
Published: January 2024

В статье дано описание испытательного комплекса и методики проведения экспериментов для изучения сложного нагружения. Приведены некоторые вопросы исследования упругопластического деформирования материалов на автоматизированной комплексе СН-ЭВМ в лаборатории механических испытаний кафедры Сопротивления материалов, теории упругости и пластичности Тверского государственного технического университета

The article provides a description of the testing complex and experimental techniques for studying complex loading. Some questions of the study of elastoplastic deformation of materials on an automated SN-EVM complex in the mechanical testing laboratory of the Department of Strength of Materials, Theory of Elasticity and Plasticity of Tver State Technical University are presented.
Inhomogeneous problem for a strip with different boundary conditions
Authors: Кержаев А.П. , Меньшова И.В. , Никитин А.В.
Published: January 2024

В статье построено точное решение неоднородной задачи теории упругости для бесконечной полосы, нижняя сторона которой жестко защемлена, а верхняя свободна. Внешняя нагрузка действует вдоль вертикальной оси полосы. Метод решения основан на использовании соотношения ортогональности Папковича. Решение представляется в виде рядов по собственным функциям Папковича–Фадля, коэффициенты которых определяются в явном виде. Приведены примеры решения задачи.

In this paper, an exact solution to an inhomogeneous problem of elasticity theory is constructed for an infinite strip, the lower side of which is rigidly clamped, while the upper side is free. An external load acts along the vertical axis of the strip. The solution method is based on the use of the Papkovich orthogonality relation. The solution is represented in the form of series in Papkovich–Fadle eigenfunctions, the coefficients of which are determined explicitly. Examples of solving the problem are given.
Experimental study of steel 45 material during deformation according to displaced fan programs
Authors: Гультяев В.И. , Алексеев А.А. , Широков А.Н. , Булгаков А.Н.
Published: January 2024

В статье приведены результаты экспериментального исследования напряженно деформированного состояния цилиндрических оболочек при реализации программ по типу смещенного веера в пространстве деформаций и описана необходимость их проведения. Показано, как величина угла излома траектории деформирования влияет на глубину “нырка” пассивной деформации при частичном упругом разгружении материала. Статья направлена на расширение знаний о напряженно-деформируемом состоянии материалов, используемых в гражданской, машиностроительной, аэрокосмической, ядерной, биомедицинской и многих других отраслях.

The article presents the results experimental study of the stress-strain state cylindrical shells when implementing programs like a displaced fan in space of deformations and the need for their implementation is described. Shown how the magnitude of the bend angle of the deformation trajectory affects the depth of the “dive” passive deformation during partial elastic unloading of the material. Article aimed at expanding knowledge about the stress-strain state materials used in civil, mechanical engineering, aerospace, nuclear, biomedical and many other industries.
Thermic and athermic plane harmonic waves in acentric isotropic solid
Authors: Мурашкин Е.В. , Радаев Ю.Н.
Published: January 2024

Настоящая статья посвящена вопросам распространения плоских термоупругих гармонических волн в ацентрическом изотропном микрополярном теле. С этой целью сначала рассматриваются динамические уравнения ацентрического изотропного тела. Определяются пространственные поляризации плоских волн трансляционных и спинорных перемещений. Обсуждается качественный характер возможных волновых решений уравнений связанной микрополярной термоупругости. Отдельно рассматривается случай атермической волны.

The present paper is devoted to the propagation of plane thermoelastic harmonic waves in an acentric isotropic micropolar solid. For this aim, the dynamic equations of an acentric isotropic solid are considered. The spatial polarizations of plane waves of translational and spinor displacements are determined. The qualitative nature of possible wave solutions to the equations of coupled micropolar thermoelasticity is discussed. The case of an athermic wave is considered separately.
Weak discontinuities propagation of displacements and microrotations in a semi-isotropic micropolar body
Authors: Нестеров Т.К.
Published: January 2024

В настоящей работе рассматривается распространение поверхности слабых разрывов вектора перемещений и псевдовектора микровращения в полуизотропном микрополярном теле. Определяется скорость поверхности слабых разрывов, при которой возможно распространение поверхностей связанных слабых разрывов перемещений и микровращений. Найдена зависимость слабых разрывов вектора перемещений от вектора микровращений и наоборот в касательном и нормальном направлении относительно поверхности слабого разрыва.

The present paper deals with weak discontinuities propagation of the displacement and microrotation vector in a semi-isotropic micropolar body. The speed of the surface of weak discontinuities is determined, at which the presence of associated weak discontinuities of displacements and microrotations is possible. The dependence of weak discontinuities is found displacement vector from the microrotation vector and vice versa in the tangential and normal direction relative to the weak discontinuities surface.
´La mujer es un peligro´
Authors: Darrigrandi Claudia
Published: January 2024

En la siguiente nota de investigación se exponen de manera preliminar expresiones de violencia simbólica de género encontradas en la prensa chilena durante la primera mitad del siglo XX. En una búsqueda orientada a analizar la conformación de las secciones que organizan revistas y periódicos, se identificaron manifestaciones de violencia de género simbólica-mediática, expresadas en contenidos verbales y/o visuales de las secciones de actualidad, humor, policial y también en la publicidad. Entre el material encontrado destacan los estereotipos de género, la denigración y la naturalización del acoso y la violencia física contra las mujeres. En la nota se plantea la importancia de comprender la función de la prensa en la perpetuación de la violencia de género y la relevancia de explorar esta problemática histórica para la promoción de una sociedad más justa y equitativa.
Transforming Diabetes Management: A Study on the Effectiveness of Smartphone Applications in Enhancing Knowledge, Attitudes, and Behavior of People with Diabetes Mellitus
Authors: Budhiwardoyo Najib , Kusumo Mahendro Prasetyo
Published: January 2024

BACKGROUND: Smartphone-based applications are important for increasing knowledge, attitudes, and behavior in people with diabetes mellitus (DM).
AIM: This study was measuring the effectiveness of the smartphone-based Electronic-Muhammadiyah Chronic Disease Monitoring (E-MMCD) application to change knowledge, attitudes, and behavior in people with DM.
METHODS: This study used quantitative methods with an explanatory design. This study begins with a preliminary study using secondary data from international journals from 2020 to 2023. The sample size in the quantitative study was 84 people with DM. The sampling technique uses the randomized control trial with a computer machine. The instrument used to determine differences in knowledge, attitudes, and behavior after the intervention is a valid and reliable questionnaire. Paired t-test was used to determine the difference before and after the intervention.
RESULTS: The results of the normality test for the intervention group concluded that the distribution of knowledge data (p = 0.000) and the distribution of attitude data (p = 0.000) were not normal (p < 0.05) so the statistical test used was the Wilcoxon test. While the practice in the intervention group after the normality test was carried out, the data distribution was normal (p > 0.05), so the test used was the paired t-test. The results of the analysis test concluded that p = 0.019. This value indicates a difference in the average PSP before and after the E-MMCD intervention.
CONCLUSION: The E-MMCD application effectively changes the knowledge and attitudes of people with DM in hospitals. A longer E-MMC intervention is needed to improve the behavior of people with DM.
The Effect of Vitamin D Supplementation on Size of Uterine Leiomyoma in Women with Vitamin D Deficiency
Authors: Dawood Hibba , Sharief Maysoon
Published: January 2024

BACKGROUND: Uterine leiomyomas (fibroids) are the most common benign genital tumors in women. There is a high prevalence of vitamin D deficiency and uterine leiomyomas.
AIM: To evaluate the effect of vitamin D supplementation on the size of uterine leiomyoma in women with vitamin D deficiency.
MATERIALS AND METHODS: It is case–control prospective study which was done in Gynecology Ward at Basrah Maternity and Child Hospital from January 2020 to August 2022. Patients at ages 20–45 years were initially included in the study if they were diagnosed with 1–3 uterine fibroids with a mean diameter ≥10 mm. Serum vitamin D levels were estimated for all women before intervention and in those with deficiency of vitamin D (level <30 ng/mL). Patients with vitamin D deficiency were divided into 2 groups. The 1st group was women who received vitamin D 50,000 cholecalciferol (oral solution) IU weekly for 10 weeks followed by 2000 IU daily for 6–9 month (as study group), while 2nd group received placebo (control group). After the duration of treatment, vitamin D level was estimated and sonography was done to assess the fibroid size at 9–12 months later. In relation to the achievement of normal 25-OH-D3 levels, after the supplementation, the studied population were divided into 2 subgroup of patients: “gave response” and “non-responders” according to their response to treatment.
RESULTS: Vitamin D level was 17.6 (±3.0) ng/mL and calcium status was 7 mg/dL among 43 females of the study group. Vitamin D level was 34.7 ± 5 ng/mL after 12 months vitamin treatment (p < 0.05). The early vitamin level among 23 control females was 22.4 ± 7.8 ng/mL in comparison to 24.6 ± 6.7 ng/mL after 12 months (p > 0.05). There was no change for calcium level before and after 12 months period (8.6 vs. 7.9 mg/dL respectively). No changes were noticed among both the study and the control groups as far as the type and position of leiomyoma between the 1st and the 2nd ultrasound after 12 months of therapy.
CONCLUSION: Lower serum vitamin D levels are significantly associated with the occurrence of uterine fibroids.
Prediction of Survival in Diffuse Large B Cell Lymphoma According to Immunohistochemistry
Authors: Cavolli Viola , Georgievski Borce
Published: January 2024

BACKGROUND: The introduction of chemoimmunotherapy in the treatment of diffuse large B cell lymphoma (DLBCL) dramatically improved the outcomes compared to chemotherapy alone. However, a significant part of the patients become refractory and eventually relapse.
AIM: The purpose of this study is to analyze the survival differences between different groups of DLBCL according to Han’s algorithm.
MATERIALS AND METHODS: We will study the medical records of 244 patients treated with RCHOP as first-line therapy who are diagnosed with de novo DLBCL in a cohort of 10 years in the University Clinical Center of Kosovo. According to immunohistochemical markers, the patients will be classified into two major groups, germinal center B cell-like (GCB) and non-germinal center B cell-like (non-GCB) subtypes, and five subgroups (Group 1, Group 2, Group 3 or double positive, Group 4, and Group 5 or triple negative [TN]).
RESULTS: The patients in the GCB group have better progression-free survival (PFS) and overall survival (OS) than the non-GCB group. Despite this, double positive (DP) (CD10+MUM1+) and TN (CD10−Bcl6−MUM−) subgroups showed different PFS and OS to the same cell-of-origin group. The DP group showed similar OS and PFS with the non-GCB group, whereas the TN group showed similar OS and PFS with the GCB group.
CONCLUSION: These factors will provide valuable knowledge for predicting the prognosis and redirecting the choice of treatment for different groups of DLBCL.
The Variation of Malaria Prevention Measures Knowledge and their Associated Factors in Rural East Nusa Tenggara Province, Indonesia
Authors: Guntur Robertus Dole , Kleden Maria A. , Kusumaningrum Damai , Islam Fakir M. Amirul
Published: January 2024

BACKGROUND: Malaria is one of the major public health problems in African and Southeast Asian countries including Indonesia. However, knowledge of malaria prevention measures (MPM) is not well studied, particularly in Indonesia.
AIM: This study aimed to investigate the level of MPM knowledge and associated factors among rural adults in high, moderate, and low endemic settings of East Nusa Tenggara Province (ENTP), Indonesia.
MATERIALS AND METHODS: A community-based cross-sectional study was conducted among a randomly selected 1495 households at rural ENTP. Multistage sampling technique was employed to recruit participants. Univariate and multivariable logistic regression model was used to assess factors affecting knowledge of MPM.
RESULTS: The MPM knowledge in long-lasting insecticide-treated net was the highest in high endemic settings (76.8%), while MPM knowledge on keeping the surrounding house clean was the highest in low-endemic settings (71.9%). The level of MPM knowledge in low, moderate, and high endemic settings differs significantly with the highest in low settings (57%, 95% CI: 50.5–63.5) and the lowest in high settings (19.3%, 95% CI: 11.1–27.5). In all settings, good level of MPM knowledge was significantly higher for adults with high socioeconomic status (SES) (adjusted odds ratio [AOR] = 2.52, 95% CI: 1.20–5.30; AOR = 20.5, 95% CI: 4.64–90.8, AOR = 3.31, 95% CI: 1.34–8.15, respectively) compared to those having low SES. In high and moderate settings, the likelihood of good MPM knowledge was considerately higher for adults with at least secondary (AOR = 2.35, 95% CI = 1.29–4.36, AOR = 2.66, 95% CI = 1.32–5.39, respectively) than those with primary or no education level.
CONCLUSION: The good level of MPM knowledge was very low in three different malaria endemic settings. Higher level of education and high SES were significantly associated with the good level. Therefore, health education promotion on MPM knowledge is critical to support malaria elimination program in the province.
The moderate level of digital transformation: from the perspective of green total factor productivity
Authors: Jia Kaiwei , Li Lujun
Published: January 2024

In the context of accelerated development of the digital economy, whether enterprises can drive green total factor productivity (GTFP) through digital technology has become the key to promoting high-quality development of the economy and achieving the goal of "dual-carbon", However, the relationship between digital transformation and GTFP is still controversial in existing studies. Based on the data of 150 listed companies in China's A-share energy industry from 2011 to 2021, this study empirically analyzes the impact of digital transformation on GTFP using a fixed-effect model. The study shows an inverted U-shaped nonlinear effect of digital transformation on enterprises' GTFP, and the conclusion still holds after a series of robustness tests. Mechanism analysis shows that enterprise investment efficiency and labour allocation efficiency play a significant mediating role in the above inverted U-shaped relationship, in which the inverted U-shaped relationship between digital transformation and GTFP mainly stems from the influence of enterprise investment efficiency. Heterogeneity analysis finds that the inverted U-shaped relationship between digital transformation and GTFP of enterprises is more significant in large-scale enterprises, new energy enterprises and enterprises in central and western regions. The study's findings provide important insights for enterprises to promote digital transformation and realize the green and high-quality development of the energy industry.
Fixed-time command filtered output feedback control for twin-roll inclined casting system with prescribed performance
Authors: Gao Dongxiang , Zhang Yujun , Wu Libing , Liu Sihan
Published: January 2024

The article investigates the issue of fixed-time control with adaptive output feedback for a twin-roll inclined casting system (TRICS) with disturbance. First, by using the mean value theorem, the nonaffine functions are decoupled to simplify the system. Second, radial basis function neural networks (RBFNNs) are introduced to approximate an unknown term, and a nonlinear neural state observer is created to handle the effects of unmeasured states. Then, the backstepping design framework is combined with prescribed performance and command filtering techniques to demonstrate that the scheme proposed in this article guarantees system performance within a fixed-time. The control design parameters determine the upper bound of settling time, regardless of the initial state of the system. Meanwhile, it ensures that all signals in the closed-loop system (CLS) remain bounded, and it can also maintain the tracking error within a predefined range within a fixed time. Finally, simulation results assert the effectiveness of the method.
An enhanced A* method incorporating an encrypted memory database for ASV efficient local path planning
Authors: Liu Yuanshuo , Wu Defeng , You Zheng
Published: January 2024

For the autonomous surface vehicle (ASV) planning problem, an enhanced A* method incorporating encrypted memory database for ASV efficient local path planning is proposed. Considering the current various path planning problems mostly use methods with high time complexity, such as neural networks, we select the A* algorithm with low time complexity as the basis. To speed up the path planning rate and further improve the real-time and realistic algorithm, this paper modifies the heuristic function of the A* algorithm by combining the motion mode of ASV. In response to the problem that the target point is far from the detection, we improve the target point design mechanism and create a new temporary target point within the detection range. In addition, the algorithm incorporates a memory database, which can record commonly used waters or retain the environmental path of navigated waters as a priori information. When the same waters are reencountered, the memory database information can be read directly to complete the navigation. Moreover, the memory database is encrypted to prevent information leakage. Finally, a simulation environment is built to verify the effectiveness of the proposed algorithm by comparison with some existing algorithms.