bluuebunny/crossref_metadata_2025 huggingface dataset:
Mathematical Modeling of the Optimization of the Cables Arrangement on the Width of the Conveyor Belt
Authors:   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,, BALABAYEV Oyum , ROZHKOV Alexander ,   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,, ASKAROV Bakhtiyar ,   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,, AKASHEV Arsen ,   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,, KOSBARMAKOV Samat ,   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,
Published: September 2023

The article presents the research work carried out in the field of conveyor transport. The analysis of the calculation scheme for the calculation has been carried out according to the theory of flexible thread. The width of the conveyor rubber-tether belt has been implemented in mathematical modeling of optimization of cable arrangement. The calculation scheme for determining the cross-sectional area has been offered. It is evident from the calculated scheme that the area of the cross area of the belt section falling for one wire is determined as a trapezium area. The total linear load is determined per rope on the belt section. The presented results of theoretical research, have an applied value, and will be interesting for scientific and engineering workers engaged in research in the field of improvement of belt conveyors operation
Vibration Monitoring of Driving Piles on the an Existing Foundation
Authors:   NPJSC «L.N. Gumilyov Eurasian National University», Kazakhstan, Astana, Satpayev Street, 2,, ZHUSSUPBEKOV Askar , TLEULENOVA Gulshat ,   NPJSC «L.N. Gumilyov Eurasian National University», Kazakhstan, Astana, Satpayev Street, 2,
Published: September 2023

The purpose of the scientific work is to determine the smallest permissible distance of the pile driving device, excluding vibration impact on the foundation and ensuring the safe operation of the plant. The authors presented the effect of vibromonitoring from «New water treating facilities W1 area». The results of the vibration effect of pile driving at various distances from the foundation, taking into account the natural fluctuations of technological processes, the massiveness of the foundation, etc., as well as the results of the excitation of the soil mass itself at different distances from the source of the vibration impact (clogging) are presented. Vibration monitoring was carried out by the Profound VIBRA+ device, using a 3D seismic sensor. Vibration measurement was carried out every 5 seconds. The tests were carried out according to the req
Modeling the Process of Cutting the Volume of Soil in the Software Package Abaqus
Authors:   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,, GANYUKOV Alexandr , ALTYNBAYEV Aset ,   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,, DYUSENBAEV Ermek ,   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,
Published: September 2023

The purpose of the study is to develop an algorithm for modeling the process of cutting an infinite volume of soil with a flat cutter in the software package Abaqus. The hypothesis of the existence of cutting resistance energy and volume is given. Analysis of shockwave propagation in soil volume is given. Model of soil cutting by milling cutter of different diameter is constructed. Boundary conditions for the model of volume of ground are determined. Boundary conditions for rotary cutter with linear feed are determined. The Drucker-Prager plastic model with the possibility of failure of elements when they reach critical values is used. Stresses in the ground when the cutter hits the ground surface are determined. Confirmation of a hypothesis about existence of energy and volume of resistance to cutting is received. Recommendations for modeling the cutting process in the software package Abaqus are given
Improvement of the Method of Wear Control of Motor Vehicles and Their Main Units
Authors:   Academy of Logistics and Transport, Kazakhstan, Almaty, Shevchenko Street, 97,, BAKYT Gabit , TULENOV Aidarali ,   NCJSC «Mukhtar Auezov South Kazakhstan University», Kazakhstan, Shymkent, Tauke Khan Avenue, 5, SHOIBEKOV Baurzhan ,   NCJSC «Mukhtar Auezov South Kazakhstan University», Kazakhstan, Shymkent, Tauke Khan Avenue, 5, BAUBEKOV Yermek ,   Academy of Logistics and Transport, Kazakhstan, Almaty, Shevchenko Street, 97,, KALMANOVA Akbota ,   Academy of Logistics and Transport, Kazakhstan, Almaty, Shevchenko Street, 97,
Published: September 2023

In the Provisions [1] specific norms of spare parts consumption by mileage intervals before overhaul are given,which created the prerequisites for the management of vehicle wear, which requires a machine-by-machine accounting of spare parts consumption. Analysis of experience in applying these standards revealed their effectiveness from the standpoint of wear management of road transport rolling stock. In this regard, there is a task to further improve the method of rationing and extend it to the main units. In this paper, we propose a method of controlling the wear and tear of the main units on the example of the motor vehicle engine, which provides standards for the cost of current repairs – spare parts and labor costs, as well as the cost of damage due to wear and tear. Based on the information revealed, the average rate of iron in the engine oil for each of the engines under control is calculated, and then determined the average rate of iron in the engine oil, which allowed to determine the dependence of cylinder liner wear on the operating time, oil burnout on wear. As a result of processing the initial information of the under-control vehicle operation, the numerical values of the parameters of the curves of dependences of the cost of current repairs on the operating time, and according to the results of spectral analysis of engine oil and accounting for its refill – engine cylinder wear on the operating time and the cost of compensation for losses from wear were determined
Analysis of the Export Activity of the Republic of Kazakhstan: Main Trends and State Support
Authors:   Karaganda University of Kazpotrebsoyuz, Kazakhstan, Karaganda, Akademicheskaya Street, 9,, KURILKIN Anton , AIMAGAMBETOV Yerkara ,   Karaganda University of Kazpotrebsoyuz, Kazakhstan, Karaganda, Akademicheskaya Street, 9,
Published: September 2023

Currently, an important indicator of the success and independence of any state is the export of goods or services. The country, performing export trade operations, demonstrates its capabilities, positioning itself as a credible trading partner with which it is possible to enter into international economic relations. Based on the data of the Bureau of National Statistics of the Agency for Strategic Planning and Reforms of the Republic of Kazakhstan, the article analyzes Kazakhstan's exports for 2015-2021. The main trading partners of Kazakhstan in the field of export are designated. The structure of exports and the main goods exported from Kazakhstan are described. Based on the conducted SWOT analysis, the strengths, weaknesses, opportunities and threats of the country's export trade are identified. The national institutions of Kazakhstan that support domestic exporters are described. Measures of state support for Kazakh exporters are structured.
Real Estate Market of Kazakhstan in the Conditions of Unstable Economy: Status and Prospects
Authors:   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,, KUZNETSOVA Svetlana , YESENBEKOVA Tleu ,   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,, MAGRUPOVA Zulfiya ,   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,
Published: September 2023

The article examines the processes associated with a decrease in business activity in the construction industry and in the real estate market of the Republic of Kazakhstan. An analysis of the real estate market for the period from December 2020 was carried out. To October 2021 the reasons for business activity are determined. The results of the assessment of the real estate market and the state of the construction industry of the Republic of Kazakhstan focused the study on three main problems: a decline in business activity due to rising prices for building materials, dependence on imports of building materials, lack of transparency in tenders for the construction of real estate. The assessment of the interim results of the implementation of the state program of housing and communal development «Nurly Zher» for 2020-2025, made it possible to determine the priorities of economic policy in Kazakhstan in the field of construction and the formation of the real estate market. The main directions of demonopolization of the construction market of Kazakhstan are formulated
Analysis of Existing Neural Networks for Image Classification
Authors:   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,, STETSENKO Alexei , SMAGULOVA Assemgul ,   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,, MUKHAMETZHANOVA Bigul ,   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,
Published: September 2023

Aspects of image classification are considered. The description of the principles of construction of convolutional neural networks is given. The principle of operation of the basic convolutional neural network is considered. The basic concepts necessary for working with neural networks are studied. A general overview of neural networks for image classification is proposed. Considered such neural networks as: LeNet, AlexNet, VGG image Net, Enet. Particular attention is paid to the architecture of neural networks. Their distinctive properties, advantages and disadvantages of neural networks were highlighted and an analysis of their effectiveness was carried out
Analysis of Complex Tests of the Module Piles in Difficult Soil Ground
Authors:   NPJSC «L.N. Gumilyov Eurasian National University», Kazakhstan, Astana, Satpayev Street, 2,, OMAROV Abdulla , ZHUSSUPBEKOV Askar ,   NPJSC «L.N. Gumilyov Eurasian National University», Kazakhstan, Astana, Satpayev Street, 2,, TLEULENOVA Gulshat ,   NPJSC «L.N. Gumilyov Eurasian National University», Kazakhstan, Astana, Satpayev Street, 2,, ORAZOVA Dinara ,   NCJSC «Toraighyrov University», Kazakhstan, Pavlodar, Lomov Street, 64,
Published: September 2023

The purpose of the scientific work is comparative analysis using Static compression load test (SCLT) and Dynamic load test (DLT) methods to determine of bearing capacity of pile foundations in difficult soil ground. Mega project is the construction site of Cargo offloading facilities (COF) in Atyrau region. In project used 2 consists module piles. Precast concrete module piles have 16 meter piles and 11.5 meter (9.5 m) piles with joint a total length of 25.5 m and 27.5 m, cross section 40×40 cm. The design of pile foundations was carried out in accordance with the requirements of regulatory standards. DLT testing method is also need for assessment of bearing capacity for module piles. Numerical modeling of piles was carried out in the Plaxis 2D program. The interaction of module piles with difficult of soil ground of West Kazakhstan is presented.
Review and Synthesis of the Main Contour of the Adaptive Control System for Unstable and Deterministic Chaotic Processes in the "Swallow Tail" Class of Catastrophes
Authors:   NPJSC «L.N. Gumilyov Eurasian National University», Kazakhstan, Astana, Satpayev Street, 2,, KISSIKOVA Nurgul , ADILBAYEV Andas ,   NPJSC «L.N. Gumilyov Eurasian National University», Kazakhstan, Astana, Satpayev Street, 2,, AKHMETOVA Saule ,   NPJSC «L.N. Gumilyov Eurasian National University», Kazakhstan, Astana, Satpayev Street, 2,, AUDANOV Dastan ,   NPJSC «L.N. Gumilyov Eurasian National University», Kazakhstan, Astana, Satpayev Street, 2,, KABANBAYEV Aibek ,   M.Kh. Dulaty Taraz Regional University, Kazakhstan, Taraz, Suleymenov Street, 7,
Published: September 2023

The research of the last century revealed a wide variety of dynamics of nonlinear systems and led to one of the most important discoveries of the twentieth century in nonlinear dynamical systems – deterministic chaos and a strange attractor. An urgent problem in the conditions of uncertainty of the parameters of the control object and external influences, for the management of unstable and deterministic chaotic processes is the use of adaptation methods. At the same time, the reference model with the desired dynamics and the main control loop of the adaptive system are constructed in the class of «Dovetail» catastrophes, and the aperiodic robust stability of the reference model with the desired dynamics and the main control loop of the adaptive system with an increased potential for robust stability is investigated by the gradient-velocity method of the Lyapunov vector functions. From the conditions of aperiodic robust stability of a generalized tunable object, the tunable coefficients are calculated and the control goal is achieved. The solution of the problem of synthesis of the main contour of the adaptive control system of unstable and deterministic chaotic processes with m – inputs and n – outputs in the class of «Dovetail» catastrophes is proposed
A Simplified Method for the Qualitative Assessment of the Luminous Flux of Led Lamps
Authors:   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,, KAYUMOV Damir , BULATBAEV Felix ,   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,, KAYUMOVA Ilmira ,   Private Institution «Polytechnic College of Corporation «Kazakhmys», Kazakhstan, Balkhash, Abay Street, 36,, NESHINA Yelena ,   NPJSC «Abylkas Saginov Karaganda Technical University», Kazakhstan, Karaganda, N. Nazarbayev Avenue, 56,
Published: September 2023

An original express method of analysis of LED lamps to determine the main values of their energy efficiency is considered on the example of street lamps Street-100 Eco, Gemera-100 and SL-96. During the research, the influence of the geometry of the illumination beam on the characteristics of scattered light and the bandwidth of a diode array spectrometer was taken into account. The authors analyzed LED products for lighting purposes on a global scale over the past decade. The completeness of the analysis of the work carried out allows the authors to derive multipliers and propose a formula for a simplified calculation of the luminous flux. For the study, a laboratory stand was created, and the dependences of illumination on time were obtained. This methodology was developed taking into account the needs of the Kazakhstani consumer market of LED products for lighting purposes, where there is a need for product quality control on the buyer's side, without burdening him with expensive equipment and allowing for an initial assessment in the shortest possible time
Detection of Phishing Threats Using Neural Networks
Authors:   NPJSC «Al-Farabi Kazakh National University», Kazakhstan, Almaty, Al-Farabi Avenue, 71,, USSATOVA Olga , ZHUMABEKOVA Aidana ,   NPJSC «Al-Farabi Kazakh National University», Kazakhstan, Almaty, Al-Farabi Avenue, 71,, MATSON Eric T ,   Purdue University, USA, Indiana, West Lafayette, 610 Purdue Mall,, KARYUKIN Vladislav ,   NPJSC «Al-Farabi Kazakh National University», Kazakhstan, Almaty, Al-Farabi Avenue, 71,, Bakytgul ILESSOVA ,   NPJSC «Al-Farabi Kazakh National University», Kazakhstan, Almaty, Al-Farabi Avenue, 71,
Published: September 2023

Today, the Internet is an effective channel for social interaction worldwide, but it also opens up great opportunities for cyberattacks. Recently, the number of botnets and phishing cyberattacks has increased dramatically. Phishing is a cyber attack carried out using a fake website designed to steal sensitive information. Detecting such attacks using machine learning algorithms and neural systems is an efficient and fast method. This paper discusses the types of Internet threats and neural network algorithms used to counter phishing attacks. The main goal of this paper is to build neural network models capable of effectively detecting phishing attacks. The methods of research are data analysis, data preprocesses and neural networks. In the first step, the Kaggle dataset containing data from 5000 legitimate and 5000 malicious web pages was gathered. The features of the dataset were analyzed and normalized. Then the Deep neural network, Convolutional neural network and Long short-term memory network were applied for threat classification. The Deep neural network and Long short-term memory network showed the best results of accuracy up to 0.96 and 0.99, while the Convolutional neural network reached only 0.75. Generally, the Deep neural network and Long short-term memory achieved the best results among the neural network methods.
Influence of Dynamic Viscosity of a Lubricant Material on the Parameters of Adhesion Bond in the Systems of Materials "12KH2H4 - STEEL 45", "45KHN2MFA - Steel 45" when Boring and Borocement Steel 45
Authors:   National University ", Kubich V.I. ,   Zaporizhzhya polytechnic",   , Zaporizhia, Ukraine, Cherneta O.G. ,   Dniprovsk State technical university, Kamenskoye, Ukraine, Yurov V.M ,   Karaganda Buketov University, Karaganda, Kazakhstan
Published: September 2023

In this work, the regularities of the change in the shear strength of the adhesive bond τ0 and the piezoelectric coefficient β in the metal systems "12Kh2N4 (45KhN2MFA) - steel 45 + B", "12Kh2N4 (45KhN2MFA) - steel 45 + VS" were obtained during physical modeling of the shear of surfaces of small-sized samples and changes in dynamic viscosity environment of their interaction with the use of additional equipment of the SMTs-2 friction machine. It has been established that borating and boron carburizing of the surface of steel 45 leads to the absence of adhesion to the surfaces of steels 12Kh2N4 and 45KhN2MFA in certain ranges of normal pressures, at which τ0> 0 and the dynamic viscosity of liquid and grease. It was found that the parameter τ0 when lubricating surfaces is determined to a greater extent for the system "12X2H4 - steel 45", and partially for borating steel 45 and low values of dynamic viscosity μ = 0.027 Pa•s. With an increase in the dynamic viscosity of the liquid phase of the lubricant in the "12X2H4 - steel 45" system, there is a tendency to an increase in the value of τ0. It was found that the absence of modification of steel 45 with boron and boron carbide predetermines the independence of the piezoelectric coefficient from the viscosity of the liquid lubricant and the shear rate. Boring and boron carburizing steel 45 predetermines an increase in the piezoelectric coefficient by an average of 1.6 times with an increase in dynamic viscosity from 0.027 Pa•s to 0.19 Pa•s at a shear rate of 10.16±0.8. At shear rate = 5.08±0.6 mm/s, the piezoelectric coefficient is relatively constant in the systems under study. With the transition to contact through a grease lubricant, there is an ambiguous manifestation of the rate of change of the piezoelectric coefficient.
Investigation of the Processes Occurring During the Operation of the Torque Converter Hub in the Belarusian Autoworks Gearbox during CAE Modeling
Authors:   Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan, Nikonova T.Yu. , Essyunin A.I. ,   Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan, Zhakupova Sh.S ,   Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan, Dandybaev E.S ,   Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan, Zhukova A.V ,   Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan
Published: September 2023

The main objective of the study is to identify and eliminate the causes of breakdowns in the torque converter hubs of mining dump trucks Belarusian Autoworks. The relevance of the work carried out: during the operation of dump trucks based on Belarusian Autoworks vehicles, in open pit conditions, according to enterprises operating such equipment, in the period from 2019 to 2021, 75% of the failures and breakdowns of equipment occurred due to the fact that the hub of the torque converter impeller is intensively loaded a part, which during its operation is affected not only by mechanical loads, but also by temperature and others leading to the failure of the specified unit in 85% of cases. For example, hydrodynamic forces that arise during the period of immersion of gear teeth in an oil bath, and so on. Therefore, it is proposed to conduct a comprehensive study of the processes occurring with the wheel hub and identify the main loaded places. Taking into account the analysis carried out, it is possible to produce a batch of wheel hubs with updated parameters and conduct their full-scale tests. The novelty of the work carried out lies in the analysis of the operating conditions of the hub, which revealed a high boundary pressure that occurs at the point of transition from the air to the oil bath. The object of research is the study of the processes that occur during the operation of the torque converter hub, which affect the structure and occur in the hub itself. Research objectives: - learn the ways and methods of conducting CAE analysis; - analyze the design parameters of the installation that occur in the torque converter bushing. Research methods: When performing the dissertation work, methods of physical and mathematical modeling and system analysis of information, laboratory, bench and operational tests using computer and high-precision measuring equipment were used
Polyamide 6 is an Integral Component of the Protective Coating for Steel ST3
Authors:   Yanka Kupala State University of Grodno, Grodno, Belarus, Pyzhik T.N.
Published: September 2023

In this study, an attempt was made to use PA 6 as a component of an experimental composite anticorrosive coating that increases the adhesion of hydrophobic coatings (iron stearate and zinc stearate) to protect structural steel St3. The phosphating primer leads to the formation of a film of iron salts insoluble in water on the steel surface and adsorption of PA 6 on them. Hydrophobization of the surface formed in this case zinc stearate leads to the formation of a coating with high adhesion and anticorrosive properties. Tannin is a corrosion inhibitor. The advantage of the tannin primer is that its molecules are able to bind to the metal surface and the PA 6 macromolecules simultaneously, forming a strong coating on the metal. Zinc stearate gives the coating hydrophobic properties and additional protection of the metal from corrosion.
Prerequisites for developing a technological preparation database of small- and medium-scale machine-building industries
Authors:   Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan, Savelyeva N.А , Zhetessova G.S. ,   Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan, Nikonova T.Yu ,   Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan, Reshetnikova O.S ,   Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan, Berg А.S ,   Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan, Berg А.А ,   Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan, Yassakov Yu.D. ,   eter the Great St.Petersburg Polytechnic University, St.Petersburg, Russia
Published: September 2023

The article deals with the analysis of currently popular databases and their control systems in order to select the most suitable for implementing the goals of the grant project funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan (Grant No AP14972804). The authors considered the main modules of the automation system for small-scale production. Most of attention was paid to the module of evaluating technological routes; the basic concept of algorithms was described and the requirements for the database architecture were presented. The analysis of various data formats was also made for the convenience of their use in the software product and storage in the database. In the future, based on the analysis carried out, implementation of the system for evaluating technological routes will be carried out, namely, the calculation of the time and the cost, both for each method and for the project as a whole, for further optimization of production.
Need Assessments of Experiential Learning-Based Entrepreneurship Textbook Development
Authors: Prastyaningtyas Efa Wahyu , Wulansari Widi , Irmayanti Elis
Published: September 2023

The success of the learning process, especially entrepreneurship, is strongly influenced by the availability of effective learning resources. The large number of available and easily accessible teaching materials does not necessarily stimulate students to learn. So it is necessary to make innovative entrepreneurship teaching materials to develop interesting learning activities and be able to arouse student interest in learning. This study uses a qualitative descriptive research method with the aim of obtaining responses from respondents as a needs analysis in developing entrepreneurship textbooks. The research subjects were students of Economics Education at Nusantara PGRI Kediri University level II class of 2021 with a research sample of 20 students and using a purposive sampling technique. Data collection was carried out using observation techniques, interviews and questionnaires on the needs of students. Analysis of the nature of this research is divided into three stages like data reduction by taking the essence of the focus on the main theme of the research. The results of this study indicate that it is necessary to develop entrepreneurship textbooks based on experiential learning (direct experience) for students.

Keywords: textbooks, entrepreneurship, experiential learning
Analysis of the Influence of Debt to Equity Ratio (DER), Earnings Per Share (EPS), and Dividend Payout Ratio (DPR) on Stock Price with Firm Value as an Intervening Variable (Case Study of LQ45 Stock Index 2015-2021 Period)
Authors: Nainggolan Yustiani , Maksum Azhar , Erwin Keulana
Published: September 2023

This study aims to examine and analyze the effect of Debt Equity Ratio (DER), Earning Per Share (EPS), and Dividend Payout Ratio (DPR) on Stock Prices through Firm Value as a mediating variable for companies listed on the LQ45 Index for the 2015-2021 period. This study used purposive sampling so that the sample in the study was as many as 12 companies listed in the LQ45 Index with a total of 84 observations and data processing in this study using IBM SPSS software. The analytical method used in this study is multiple linear regression analysis and path analysis.
The results showed that Earning Per Share (EPS) and Dividend Payout Ratio (DPR) positively and significantly affected firm value. In contrast, the Equity Ratio (DER) had no significant effect on firm value. Debt to Equity Ratio (DER) and Earning Per Share (EPS) positively and significantly affect stock prices. In contrast, the Dividend Payout Ratio (DPR) and Firm Value do not significantly affect stock prices. The Firm Value variable can only mediate the relationship between the Dividend Payout Ratio (DPR) and stock prices.

Keywords: Debt to Equity Ratio, Earnings Per Share, Dividend Payout Ratio, Firm Value, and Stock Price.
Belonging, racializing, and placemaking in student organizations for multiracial student leaders
Authors:   Delaware State University, Sasso Pietro , Bullington Kim ,   Old Dominion University, Perry Lindsy ,   Austin Peay University
Published: September 2023

This qualitative intersectional narrative inquiry examined how Multiracial college students find sense of belonging in student organizations by negotiating multiple racial identities and locations in traditionally monoracial spaces. Multiracial students sought membership in organizations because they felt invisible at their institutions. To find belonging within student communities, they engaged in a difficult process of placemaking in which they experienced monoracism and other racialized microaggressions within student organizations. In time, they developed a sense of belonging by curating a small cohort of friends connected through their organizational involvement. These findings reveal implications that further inform approaches for student involvement professionals and others who work with Multiracial students to increase their support and engagement across involvement contexts.
EFFECT OF SAHA AND C-JUN N-TERMINAL KINASE INHIBITOR ON THE INDUCIBLE MRNA EXPRESSION OF INTERLEUKIN-17
Authors:   Department of Molecular Biology, Immunology and Medical Genetics, Faculty of Medicine, Trakia University, Stara Zagora, Bulgaria., Grigorov Boncho , Platikanova Magdalena ,   Department of Hygiene, Infectious Diseases and Epidemiology, Faculty of Medicine, Trakia University, Stara Zagora, Bulgaria., Dobreva Zlatka ,   Department of Molecular Biology, Immunology and Medical Genetics, Faculty of Medicine, Trakia University, Stara Zagora, Bulgaria., Grigorova Antonia ,   Department of Molecular Biology, Immunology and Medical Genetics, Faculty of Medicine, Trakia University, Stara Zagora, Bulgaria., Stanilova Spaska ,   Department of Molecular Biology, Immunology and Medical Genetics, Faculty of Medicine, Trakia University, Stara Zagora, Bulgaria.
Published: September 2023

Interleukin-17 (IL-17A) is a critical cytokine for immune defence against extracellular bacterial and fungal infections. Excess production during chronic inflammation has been associated with many inflammatory and autoimmune disorders. On the other hand, the inducible expression of many cytokine genes is regulated by the receptor-activated intracellular signaling pathways, including the JNK pathway, and different epigenetic mechanisms, including histone deacetylation by HDACs. We investigated the comparative effect of the HDACs inhibitor Suberoylanilide Hydroxamic Acid (SAHA) and an inhibitor of the JNK signaling pathway in the regulation of the inducible IL-17 expression at the mRNA level in PBMCs from healthy donors. For the detection of IL-17 mRNA transcripts was used qRT-PCR. We detected significantly increased levels of IL-17mRNA under the stimulation of the PBMC cultures with lipopolysaccharide (LPS) or C3 binding glycoprotein (C3bgp) in the presence of an inhibitor of the JNK transduction pathway. The inhibition of the JNK signaling pathway leads to the upregulation of the expression of IL-17mRNA. SAHA did not demonstrate a significant effect on the IL-17mRNA transcription compared to the inhibitor of the JNK pathway. In conclusion, we suppose that the synthesis of IL-17 mRNA is regulated by both the JNK transduction pathway and HDAC activity, but with different effects.
Análise da cobertura vacinal contra HPV no Brasil: uma revisão sistemática
Authors: Gouvêa Emanuela Heiderick
Published: September 2023

Introdução: O papilomavírus humano (HPV) é uma infecção sexualmente transmissível (IST) comum que afeta tanto homens quanto mulheres. Estima-se que mais de 300 milhões de mulheres sejam portadoras desse vírus, que pode ter diferentes riscos oncogênicos para o câncer do colo do útero. O objetivo desta pesquisa foi analisar a cobertura vacinal contra o HPV em adolescentes dos sexos feminino e masculino nas diferentes regiões do Brasil, utilizando--se os dados do Departamento de Informática do Sistema Único de Saúde (DATASUS). Métodos: Esta pesquisa é uma revisão sistemática com uma abor-dagem quantitativa e qualitativa. Realizou-se análise temporal retrospectiva e transversal utilizando-se dados do DATASUS. Coletaram-se informações sobre as doses da vacina contra o HPV aplicadas em adolescentes no período de 2014 a 2022. O cálculo da taxa de cobertura vacinal acumulada foi feito dividindo o número de doses aplicadas pelo total estimado da população na faixa etária selecionada, de acordo com o Instituto Brasileiro de Geografia e Estatística (IBGE). Resultados: Em 2014, a cobertura vacinal para a primeira dose foi adequada, mas houve baixa adesão para a segunda dose. Nos anos seguintes, 2015 e 2016, houve redução expressiva na cobertura vacinal para ambas as doses. A Região Norte apresentou a menor cobertura, enquanto a Região Sudeste teve a maior cobertura até 2017. A Região Sul teve discreta melhoria nas taxas. A cobertura vacinal variou nos anos seguintes, mas perma-neceu abaixo de 80%, considerada adequada de acordo com o Plano Nacional de Imunizações, até o ano de 2022. A baixa adesão à vacinação é explicada por vários fatores, incluindo recusa. Conclusão: A cobertura vacinal da primeira dose da vacina contra o HPV no Brasil foi considerada adequada somente no ano de 2014, quando houve implantação efetiva de políticas públicas direcio-nadas a escolas e Unidades Básicas de Saúde. No entanto, nos anos seguintes, houve queda na cobertura vacinal contra o HPV e aumento no número de casos de câncer do colo do útero.
Identificación de malezas asociadas al cultivo de la sábila (Aloe vera barbadensis M.), en el departamento de La Paz, Bolivia
Authors: Espejo Quispe Félix , Pozo Velázquez Edilberto
Published: September 2023

La comunidad de Cahuayuma, municipio de Mecapaca departamento de La Paz, Bolivia, es reconocida por la producción de sábila con certificación orgánica sin el uso de plaguicidas de origen sintético desde hace más de 10 años. Las hojas y gel de excelente calidad poseen un alto valor en el mercado. Dentro de este sistema de producción las malezas son uno de los principales problemas que afectan la productividad y la calidad de las hojas del cultivo de Aloe por lo que se considera necesario conocer las especies, que contribuya a un manejo de estas arvenses. El objetivo del presente estudio fue determinar las especies malezas asociadas al cultivo de sábila con certificación orgánica en la comunidad de Cahuayuma. Para lograr este objetivo se visitaron dos parcelas, y se procedió a recolectar muestras y fotografiar las diferentes especies de malezas que se encontraban dentro de la parcela con el cultivo de Aloe. La identificación de malezas se realizó según descripción y clasificación taxonómica apoyada con revisión bibliográfica. Se determinaron 46 especies de malezas en 17 familias botánicas Asteraceae con 26.09 % presentó el mayor número con 12 especies seguida por Brassicaceae con 10.87 %.
Prácticas alimentarias en Ocozocoautla de Espinosa, Chiapas: análisis social y cultural de Los Zoques
Authors: Esponda-Pérez Jorge Alberto , Galindo Ramírez Sergio Mario
Published: September 2023

La alimentación cultural en la sociedad juega un papel importante en la nutrición, sustentabilidad y en la identidad de los municipios. La identidad se construye a través de las relaciones sociales, conocimientos, arraigos ancestrales, patrimonio gastronómico, el objetivo consiste en identificar los ingredientes y preparaciones culinarias Zoques, tomando como muestra a los habitantes del municipio de Ocozocoautla, los cuales continúan preservando la cultura alimentaria, pese a las diferentes adversidades económicas y sanitarias, a través de tradiciones, como lo es el Carnaval Zoque Coiteco. Metodología: Por lo que este articulo ofrece apreciaciones analíticas con el apoyo de un estudio etnográfico y antropológico sobre la alimentación cultural, prácticas y la relación que existe entre tradiciones y conocimientos sociales. Conclusiones: La alimentación cultural-tradicional forma parte de la dieta diaria en los pobladores de Ocozocoautla, así como de la seguridad alimentaria mediante la preservación de recetas, técnicas y usos de ingredientes tradicionales.
La producción de avena (Avena sativa) en grano: un integrador agroecológico en los sistemas de producción familiar
Authors: Terán Céspedes René , Claure Herrera Anel Adriana , Alba Maydana Rossina
Published: September 2023

La producción de avena por su versatilidad y cualidades nutricionales está ampliamente extendida en países vecinos como Argentina y Chile no sólo por su importancia para la alimentación humana sino también animal, destacando su uso con este doble propósito. En este marco, la producción de avena en Bolivia, en el ámbito de la agricultura familiar puede constituirse en una oportunidad no sólo de generación de ingresos sino también de adaptación al cambio climático al comportarse como integrador agroecológico. En este contexto se muestran resultados referidos a: i) el comportamiento productivo de cinco ecotipos de avena en grano en el que destaca el rendimiento del ecotipo Gamma con 2 284 kg ha-1 y Ajpaya con 1 327.16 kg ha-1, ii) descripción morfológica en el marco de la normativa nacional e internacional vigentes de dos ecotipos: Gamma y Alta Bruma que cumplieron los requisitos y podrán proseguir con los procedimientos para la certificación de semillas; iii) ensayos comparativos de cultivo de avena en sistema tradicional y en sistema de cultivo biointensivo que demostraron la resiliencia del sistema biointensivo, además de mostrar la posibilidad de un doble propósito en la producción de grano y de forraje como es el caso del ecotipo Qantati que alcanzó un rendimiento en materia seca de 11 278 kg ha-1. Todos estos resultados orientan a motivar el aprovechamiento de este cultivo por parte de la agricultura familiar fundamentalmente de las regiones de Valles Interandinos (Ayllu Huayanca, municipio de Mocomoco) y del Altiplano Norte de La Paz (comunidad Puchuni, municipio de Laja) donde se han realizado las investigaciones.
Propagación in vitro y en vivero de Baccharis incarum para revegetación en taludes de carretera Senkata y Mantecani La Paz, Bolivia
Authors: Mamani Sánchez Beatriz , Chalco Virginia , Nova Pinedo Máximo
Published: September 2023

La construcción de carreteras ocasiona cambios en el paisajismo del ecosistema, en casos extremos causa la erosión y pérdida de capacidad productiva del suelo. Para este tipo de proyectos, en las EEIA como medida de mitigación recomiendan revegetación del derecho de vía con especies nativas. En el caso de la construcción del tramo carretero Senkata y Mantecani, Baccharis incarum, entre otras, están identificada para estos fines. En ese sentido, el objetivo del presente trabajo fue evaluar la propagación in vitro desde la germinación, multiplicación, enraizamiento y aclimatación y evaluar la propagación por semillas en sustratos en condiciones de vivero. Las semillas fueron sembradas en medio MS, para la multiplicación se emplearon los T1 (0.2 mg L-1 BAP); T2 (0.2 mg L-1 BAP+0.01 mg L-1 ANA); T3 (0.4 mg L-1 BAP) y T4 (0.4 mg L-1 BAP+0.01 mg L-1 ANA). Para el enraizamiento se emplearon los T1 (75 % MS+30 g sacarosa); T2 (75 % MS+0.5 mg L-1 AIB+30 g sacarosa); T3 (75 % MS+0.5 mg L-1 AIB+50 g sacarosa) y T4 (75 % MS+0.5 mg L-1 AIB+70 g de sacarosa). Durante la aclimatación se usó sustratos T1 (3:2:1) y T2 (3:2:2) de tierra negra, arena y humus de lombriz respectivamente. Para la siembra en vivero se empleó el sustrato T1. En condiciones in vitro a los 42 días presentó un 48.47 % de germinación, el T2, en la multiplicacion obtuvo mayor número de brotes durante el segundo subcultivo (9.4) con 35.8 mm de longitud del brote. El T2 presentó mayor número de raíces (8.1) con menor longitud (29.7 mm). Los dos sustratos presentaron un 97 % de sobrevivencia. En condiciones de vivero un 30 % emergieron al cabo de 4 días de siembra.
Caracterización de la producción de fibra de alpaca Huacaya (Vicugna pacos) en la comunidad originaria Chacaltaya
Authors: Quispe Y , Ayala C. , Fernández P.
Published: September 2023

La población de alpacas en Bolivia es de aproximadamente 500 000 cabezas y cuyo producto principal es la cosecha anual de la fibra, la misma que para su comercialización requiere cumplir con varios requisitos de calidad y de esa manera también obtener los mejores precios por dicho producto. Bajo este contexto en la comunidad Originaria Chacaltaya del departamento de La Paz, se realizó la caracterización del potencial productivo y la calidad de fibra de 304 alpacas huacaya, de distintos colores, sexo y edad (DL, 2D, 4D y BLL). La metodología implicó visitas de campo para la obtención de datos y entrevistas semi estructuradas a los miembros de cada unidad familiar, que mostraron la siguiente composición en sus rebaños, un 48.68 % DL, 27.30 % BLL, 14.14 % 4D y 9.97 % 2D, las cuales se manejan bajo un sistema de pastoreo extensivo en pradera nativa, donde también se determinó que la faena de esquila en un 70 % es bianual y 30% anual, con un peso promedio de vellón de 4.2 lb por alpaca para la esquila bianual y 4 lb por alpaca para la esquila anual. La frecuencia del manto colores fue de 97.37 % para colores enteros y 2.63 % para colores manchados. Los resultados del análisis de laboratorio señalan un diámetro medio de fibra de 23.38 µm, con un coeficiente de variación del 27.44 %, un factor confort de 86.87 % y una longitud de mecha de 12.37 cm. Se estableció que la calidad de fibra en la comunidad está en el rango de 22-25.5 µm, presenta un elevado porcentaje de variación en longitud de fibra y el factor confort es levemente bajo, recomendando realizar un programa de mejoramiento genético por diámetro de fibra.
Glycemic Control Determinant of Diabetes Mellitus Patients
Authors: I Wayan Sukawana  , I Made Sukarja  , Listina Ade Widya Ningtyas  , Ni Luh Putu Yunianti Suntari Cakera  , Ni Made Juniari
Published: September 2023

Diabetes Mellitus (DM) is a chronic disease that cannot be cured. Complications in DM are the main cause of blindness, kidney failure, heart attacks, strokes, and amputations of the lower limbs. Various problems in DM can be prevented by controlling DM. DM control is influenced by individual factors and external factors. This study aims to determine the determinants of DM control on DM control parameters. The study was carried out with a cross-sectional design on 31 DM patients who were taken consecutively in July 2022 at the Ubud I Gianyar Health Center. The data collected in this study were HbA1c levels, blood glucose levels (fasting and 2 hours post-prandial), systolic and diastolic blood pressure. The results obtained are factors of age, gender, duration of DM, and dietary adherence together had a significant effect of 75.6% (p-value = 0.00) on HbA1c control. There is a significant contribution of 39.5% to systolic control. Has a significant effect (p-value omnibus test = 0.013) of 45.2% on controlling fasting glucose levels. The conclusion is that DM control by intervening modifiable factors such as emphasizing the importance of dietary adherence.
The Relationship Between Knowledge and Behavior Regarding COVID-19 Prevention among Elderly
Authors: Clara Laturette Silvia , Novelia Shinta , Syamsiah Siti
Published: September 2023

The process of getting old will continue to occur and cause various morphological changes that affect the function of the respiratory system. The respiratory system in the elderly shows a structural and functional decline, resulting in increased respiratory work compared to other young people. This is associated with a decreased ability when suffering from mother acute diseases such as heart defects, bacterial or viral infections, and blockages in the airway. The risk of complications from COVID-19 is higher in some vulnerable populations, especially the elderly and individuals who suffer from weakness or have some chronic conditions. The risk of death increases with age and is also higher in those with diabetes, heart disease, blood clotting problems, or who have shown signs of sepsis. The purpose of this study is to determine the relationship between Knowledge and COVID-19 Prevention Behavior in the Elderly This type of research is quantitative research. The population is all elderly in the working area of Piru Health Centre, which consists of 123 people. The sample consisted of 94 people selected by simple random sampling. Research instruments are questionnaires of knowledge and behavior. Data analysis is performed univariately and bivariate using the chi-square test. The results showed a significant relationship between knowledge and COVID-19 prevention behavior in the elderly in the Piru Health Center Work Area. Knowledge influences the behavior of the elderly health, so it is hoped that the government can provide Health Education to improve the understanding of the elderly to improve COVID-19 prevention behavior.
Effect of Maternal and Newborn Care Intervention on Maternal Functioning of Primiparous Mothers
Authors: Thwin Me Me , Htay Nyi Nyi , Mya Theingi
Published: September 2023

Primiparous mother is confronted with many physical and psychosocial changes during the postpartum period which consequently affect her maternal functioning. To deal with these changes positively, the maternal functioning of postpartum mothers should be enhanced by the provision of maternal and newborn care intervention (MNCI). A quasi-experimental research pretest post-test comparison group design was used to study the effect of MNCI on the maternal functioning of primiparous mothers. This study was conducted in Mandalay Central Women’s Hospital, Myanmar. A total of 72 primiparous mothers (control group=36, intervention group=36) were recruited by consecutive sampling. The MNCI was given to the intervention group in the form of direct nursing care, individual and group teaching and demonstration using audio-visual materials and an educational booklet, discussion in “Peer Viber Support Group” and follow-up telephone calls. Baseline assessment was done at antenatal 32nd to 36th weeks to assess postpartum self-care knowledge, maternal newborn care knowledge, and social support. At six weeks postpartum, self-efficacy and maternal functioning of participants were assessed in addition to baseline assessment. Descriptive statistics, paired t-test, independent t-test, and Chi-square test were used to analyze the data. The results showed that maternal functioning was significantly improved in the intervention group than the control group at postpartum six weeks (p < 0.05). The improvement was also found in postpartum self-care knowledge, maternal newborn care knowledge, social support, and postpartum self-efficacy of primiparous mothers at postpartum six weeks (p < 0.001). This study highlighted that the MNCI was effective in enhancing the maternal functioning of the primiparous mothers. Further studies are recommended to determine the effectiveness of the MNCI upon health outcomes of postpartum mothers and babies in hospitals and community settings.
Streamlining the archiving of science blog posts
Authors: Fenner Martin
Published: September 2023

The Rogue Scholar science blog archive is adding important functionality to existing science blogs. The first step after a blog has signed up with Rogue Scholar is archiving the content. This is not only needed for long-term preservation but also enables full-text search and DOI registration with meaningful metadata.
Fail Safe: Kids don't always need your protection
Authors:   Character Lab, Edmondson Amy
Published: September 2023

As a parent, it’s natural to want to shield your kids from failure. Why should they live through the painful mistakes you can see from a mile away?