bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the change of the combined moment of inertia for two-link manipulator with angular coordinate system
Authors: Korobenko Yaroslav , Mishchuk Dmytro , Sankin Illja
Published: September 2024

The main of the problems of the development of two-link manipulators with an angular coordinate system is the lack of effective and universal control systems capable of implementing energy-intensive modes of movement. This is due to the design features of the pointer system of such manipulators and the methods of their use. During the operation of the manipulator, significant dynamic loads occur in its drive system, which create oscillations of the mechanical system and reduce the accuracy of work. The control system must also effectively compensate for such dynamic variations.
Dynamic equations of motion used to build manipulator control controllers, which allow taking into account various features of using manipulators. These mathematical models necessarily contain one of the characteristics in the form of the combined moment of inertia of the mechanical system, which is important in the calculation of differential equations and the determination of kinematic parameters of motion.
In this article, the combined moments of inertia of the boom system of a two-link manipulator with an angular coordinate system are determined. A study was carry out and it shown that the nature of the change in the combined moments of inertia influenced by the modes of movement of the boom system links.
The results of the study showed that the combined moment of inertia of the boom system of the manipulator is not a constant value, which does not change uniformly under special operating conditions of the machine.
To determine the combined moments of inertia, the method of bringing the kinetic energy of the moving system to the drive mechanism was apply. This is relevant, because in the future it will be necessary to adjust the unevenness of the movement of the manipulator links by the drive itself.
The study was conduct for a typical linear motion mode and a motion mode with a change in speed along a parabolic trajectory.
Design procedure of reach stacker control system
Authors: Lysak Serhii , Balaka Maksym , Machyshyn Hryhorii , Diachenko Oleksandr , Shcherbyna Tetiana
Published: September 2024

Reach stackers are efficient and maneuverable machinery for an overload of overall containers in cargo terminals and ports today. Such machinery design determines the practical interest of the engineering industry specialists. However, the lack of information in open sources about structural or kinematic diagrams of equipment control mechanisms and recommendations for their calculation does not allow an effective approach to the creation and update of reach stackers.
We developed the design procedure of the reach stacker control system, which considers the kinematic and geometric parameters of the container spreader, as a result of the conducted research. It can be used in the design stages of mechanisms for spreader lateral displacement, extension of the spreader sections, spreader inclination in the vertical plane, container fixation by spreader, spreader rotation, lifting-lowering and telescoping of the boom, as well as during the real operation modes of reach stackers in cargo terminals and ports.
Analysis of the principles of working load formation in power drives of construction machines and equipment
Authors: Yesipenko Alla , Rashkivskyi Volodymyr , Zaiets Yuri
Published: September 2024

The purpose of the proposed article is the analysis of the principles of the formation of the workload on the executive bodies of construction machines and technological equipment, which is due to the need for their improvement in order to improve the energy and technological indicators of technological processes.The methodology is based on search, research and creative approaches. The methods of development analysis, patent search, synthesis of technical solutions, simulation modelling was used. Scientific novelty. The study of various approaches to ensuring the implementation of the working movements of executive bodies of construction machines and mechanized technological equipment, the analysis of technical solutions allowed to substantiate the directions of development of drives of construction machines to ensure the necessary laws of movement of executive elements. The authors proposed constructive solutions for synthetic drives of construction machines and equipment, proposed energy-saving approaches aimed at reducing energy consumption. Research results. The article deals with important issues of analyzing the formation of loads on executive bodies of construction machines and equipment. Synthesized constructive solutions obtained in the course of patent research, analysis of modern technical solutions, rational technical design and expert evaluation are presented. A technical solution is proposed to ensure the implementation of adaptive feed in a hydraulic power drive, which can be used in the modernization of existing drives of construction machines and moving parts of mechanized technological equipment.
Review and analysis of software simulators for robotic information systems
Authors: Efremova Sofia , Mishchuk Dmitry , Horbatyuk Evgeny
Published: September 2024

The rapid development of educational technologies requires the active involvement of new means and effective teaching methods. One of the innovative tools of learning in the field of robotics is the use of robot simulators in the educational process, which open up many opportunities for better assimilation of knowledge and development of practical skills among students.
Robot simulators are software complexes that allow you to visualize and simulate the behavior of real robots. With these tools, students can:

program robots in a virtual environment, test code and debug without the risk of damaging real equipment;
to study robotics and the principles of robot operation, exploring different types of sensors, actuators and algorithms of robot behavior;
to solve problems in various fields, such as production automation, logistics, construction, etc.;
practices your skills in a safe and controlled environment.

Among the benefits of using robotic simulators are next:

availability for a large number of students, as simulators are much cheaper than real jobs;
safety, as the virtual environment eliminates the risks associated with working with real robots;
flexibility that allows students to work at their own pace, explore different scenarios and experiment with different parameters;
interactivity with a realistic 3D-environment and visualization.

This work presents an overview and analysis of software that allows modeling robot control systems and simulating their operation for various algorithms.
A review and analysis of the proposed software tools for simulating robotic systems, which are used to teach bachelor's and master's degree students in the specialties of "Computer Science", "Information Systems", "Industrial Mechanical Engineering" and "Applied Mechanics" and have proven their effectiveness and effectiveness in distance learning at the Kyiv National University of Construction and Architecture.
Burnout Professional Fulfilment and Sleep Quality in Indian Healthcare Workers in Times of the Covid-19 Pandemic
Authors: Somaiya Mansi , Shikhare Aishwarya , Shaikh Mohammed Ali , Subramanyam Alka A.
Published: September 2024

Aim and Background: With more than 210 nations affected, the SARS-COV-2 became the most widespread worldwide pandemic. As of 14 April 2022, over 500 million cases were confirmed globally Given these numbers, it was hardly surprising that the Covid-19 epidemic significantly strained healthcare systems worldwide. This study aimed to evaluate the degree of Burnout, Professional fulfilment, and Sleep quality across various groups of healthcare professionals working during the Covid-19 pandemic and looked for any correlation between these three variables.
Methods: This study employed a cross-sectional observational research design and gathered data from respondents across various regions of India through an anonymous online or paper-based questionnaire tailored to the preferences of each participating Healthcare Worker (HCW). The assessment of professional fulfilment was conducted by employing the Stanford Professional Fulfillment Index and the sleep quality of healthcare workers was determined via the use of the Pittsburgh Sleep Quality Index. The variables were analyzed using statistical tools; Chi-square test, Fisher’s Exact test,Kruskal-Wallis One Way Analysis of Variance and Spearman’s rank correlation
Results: Burnout was notably higher among the HCWs with poorer Sleep quality and lower in HCWs with higher Professional Fulfilment. Correlations further revealed that Burnout scores positively correlated with Work exhaustion and Interpersonal Disengagement
Conclusion: This illustrates that HCWs with poorer sleep quality and lesser professional fulfilment experienced greater burnout at work during the COVID-19 pandemic
Clinical significance: These insights guide healthcare providers and policy markers to optimize the well being of Healthcare Workers and foster informed preparedness in case of future pandemics.
Keywords: COVID-19, PSQI, HCW, SPFI, Burnout, Professional Fulfilment, Sleep Quality.
MANAGEMENT OF ECONOMIC STABILITY IN CONDITIONS OF GLOBALIZATION
Authors: Тарасюк Михайло , Кулініч Тетяна , Микуланинець Світлана
Published: September 2024

The relevance of this research is because globalization is rapidly changing the economic environment of enterprises, in particular, forming new challenges in modern management practices, such as increasing competition in global markets, the need to minimize the consumption of non-renewable resources, increasing demands for product and service quality, strengthening regulatory pressure, instability of exchange rates, political risks, and more. So, one of the most important tasks becomes ensuring the economic stability of enterprises, which will allow them not only to withstand new challenges but also to thrive in conditions of high competition and a changing external environment. The paper aims to develop effective management approaches to enhance enterprise resilience against external shocks and internal imbalances. The research has demonstrated that managing economic resilience in a globalized environment requires a comprehensive approach, enabling enterprises to survive and thrive in a dynamic and competitive landscape.
Web system in the management of Preprofessional internship in students at the Private University of Trujillo [Sistema web en la gestión de Prácticas Pre Profesionales en los estudiantes de la Universidad Privada de Trujillo]
Authors: Díaz Díaz Franklin Alexis , Gómez Avila José Alberto , Castillo Montalván Luis Felipe Raúl , Córdova Otero Juan Luis , Chávez Arana Elka Judiht
Published: September 2024

The objective of this study is to improve the management of preprofessional internships for students at the Private University of Trujillo. The Directorate of Professional Development and Job Board, in charge of connecting students with companies for their pre-professional internships, carries out a series of manual processes for this purpose and disseminates them through printed publications in the university's wall newspapers, where on many occasions they go unnoticed. In addition to this, students do not necessarily have classes scheduled every day of the week, losing the opportunity to apply for a job offer that has been recently published and whose time for submitting the file is in a short period of time. As these are printed publications, there is minimal risk of them being lost, damaged or intentionally tampered with, without the management being aware of it. With the arrival of the COVID-19 pandemic and everything that this entailed, since the current government declared a state of national emergency, the Directorate saw a decrease in the population of students eligible for pre-professional internships. The study corresponds to the cross-sectional correlational type, with a variant population for each identified indicator. For statistical analysis, the SPSS Static 21 program was used and the Kolgomorov-Smirnov normality test, Student's t test and Wilcoxon for related samples were used to test the hypotheses. The results showed that the time spent searching for information before the implementation of the web system is greater than the time spent searching after the implementation of the web system (p=0.00). The Rational Unified Process software development methodology was used, supported by the unified modeling language (UML). On the other hand, the time to register pre-professional internship advertisements before the implementation of the web system is greater than the time to search after the implementation of the web system (p=0.00). Also the degree of user satisfaction before the implementation of the web system is lower than the degree of user satisfaction after the implementation of the web system (p=0.00). It concludes with a decrease of 83.02% in the time spent searching for ads; a 57.40% decrease in the time to publish ads, and a 45.51% increase in the level of user satisfaction. All this leads to the conclusion that the implementation of a web system improves the management of pre-professional internships of students at the Private University of Trujillo.
The Effect of Labor Union Characteristics on Management Performance : Focusing on the Mediating Effect of Organizational Immersion
Authors:   Korean Association Of Computers And Accounting, Gyun Mi-Ryung , Lee Jin-Soo
Published: September 2024

[Purpose] In this study, the characteristic factors of labor unions, such as the ethics and the efficacy of the union, are taken as the independent variables, and the effect on performance is analyzed by using organizational commitment as a parameter.
[Methodology] This study adopts a survey method. Reliability analysis, factor analysis, correlation analysis, and regression analysis aree performed for statistical analysis, and SPSS version 26 is used for statistical processing package.
[Findings] First, the ethics of the union and the efficacy of the union have a significant defining effect on management performance. Second, the ethics of the union and the efficacy of the union are found to have a statistically significant defining effect on organizational commitment. Third, it is found that organizational commitment has a positive (＋) effect on management performance. Fourth, in the process of the main characteristic factors of labor unions, such as the ethics of the union and the efficacy of the union, affecting the management performance, organizational commitment shows a mediating effect.
[Implications] These findings will contribute to the development of trade unions in our country. It will also shed light on the determinants of sustainable corporate performance.
A Case Study on the Accounting Choice of Refixing Convertible Bond : Focus on the Classification of Conversion Rights
Authors:   Korean Association Of Computers And Accounting, Baek Jeong-Han , Baek Gi-Ho , Shin Jin-Chul , Son Min-Ji
Published: September 2024

[Purpose] The purpose of this study is to analyze through actual cases how a company’s accounting choices related to the right to convert refixing convertible bonds subsequently affect its financial statements.
[Methodology] Among companies that issued convertible bonds with similar conditions at the same time, the entity classifies convertible bonds into derivative liabilities, capital, and derivative liabilities, respectively, subsequently reclassifies them into capital to confirm from a practical point of view how the accounting treatment of convertible bonds affects financial statements. In particular, considering that the refixing clause is linked to the stock price of the issuing companies, we consider whether the stock price movement was similar when selecting the sample companies to show that it is not an unusual case that appears only in extreme samples.
[Findings] If the conversion right is classified as equity, changes in the share price and subsequent accounting for the conversion right do not affect the financial statements, but if it is classified as a liability, it can have a material impact on the statement of comprehensive income, and the impact increases with the size of the convertible bond issued and the change in share price. We also found that the accounting choice for the conversion right can be changed at the discretion of the companies, but it is confirmed that related disclosures is very insufficient.
[Implications] The case of this study confirm that accounting for items that are not clearly presented in K－IFRS can cause confusion in the capital market if the accounting treatment is not clearly defined by the relevant authorities. It also suggests that political efforts should be made to ensure that the IASB’s discussion process for revising IAS 32 takes into account the situation in Korea.
A Study on Corporate Intellectual Capital and Corporate Financial Performance : Focusing on the MVAIC Theory
Authors:   Korean Association Of Computers And Accounting, Kim Jin-Hwang , Kim Kweon-Rang
Published: September 2024

[Purpose] The value of the Fourth Industrial Revolution is increasing as it applies to the development of new growth industries. One of the core technologies is Internet of Things (IoT).
[Methodology] The research data used was 498 manufacturing company data from the domestic KOSPI, and the research verification period was 2015 to 2019 (5 years). The modified value－added coefficient (MVAIC) model is applied to measure the value－added efficiency of intellectual capital (IC) during the period, and multiple regression analysis is used to verify the research hypothesis.
[Findings] The results of this study are as follows. It can be seen that intellectual capital (IC) can increase solid performance in the domestic manufacturing sector, and corporate financial performance is determined by invested capital (PC), human capital (HC), structural capital (SC), and relational capital (RC). It was confirmed that it was affected.
[Implications] The implications of this study are as follows. We expanded previous research by quantifying the relationship between intellectual capital (IC) and corporate financial performance. The significance of this study is that it can serve as a basis for future research in studying the current status of intellectual capital (IC) and its impact on a company’s financial performance.
Analisis Faktor-Faktor Kesulitan Belajar Siswa Pada Mata Pelajaran Ekonomi Kelas XI IPS Di SMAN 3 Muaro Jambi
Authors: Saputri Annisa Oktaviani , Alvionita Havizah , Ningrum Lusiana
Published: September 2024

This research aims to find out what are the most dominant factors that influence students' learning difficulties in class XI Economics Subjects at SMAN 3 Muaro Jambi. The research method used in this research is a quantitative method using factorization analysis techniques for research variables. The research results show that the school factor remains the most important factor in implementing activities and interactions in teaching and learning activities, both in providing theoretical and practical material. The better the development of a school in providing the best for the learning carried out, the lower the students' learning difficulties will be.
Pengaruh Pengangguran, Pembangunan Manusia, dan Upah Minimum Terhadap Kemiskinan di Provinsi Papua
Authors: Jati Damar , Purnomo Sodik Dwi , Retnowati Diah , Zumaeroh Zumaeroh
Published: September 2024

Poverty is a major concern for governments around the world, especially in developing countries such as Indonesia. In Indonesia, the government prioritizes poverty alleviation as part of efforts to improve people's welfare. This study aims to examine the influence of unemployment, human development index, and regional minimum wage on poverty in districts/cities in Papua Province during the period 2017-2021. Data from 29 districts/cities in Papua were analyzed using the panel data regression method. The three estimation approaches used include common effect, fixed effect, and random effect. Based on the results of the best model selection test, random effect was selected as the most suitable model. The analysis using this model shows that unemployment has a negative impact on poverty, contrary to the hypothesis that unemployment has a positive impact. In addition, the human development index also has a negative influence on poverty, while the regional minimum wage has no significant effect on poverty levels.
Pengaruh Penerapan Kurikulum Merdeka dalam Pembelajaran Terhadap Hasil Belajar Ekonomi Siswa Kelas X Di SMA Al-Huda Pekanbaru
Authors: Wati Indah , Mardiah Ainul
Published: September 2024

This study aims to examine the effect of implementing the Merdeka Curriculum in learning on the economics learning outcomes of tenth-grade students at Al-Huda Senior High School in Pekanbaru. This research used a quantitative approach with quantitative descriptive analysis techniques. The population of the study consisted of all tenth-grade students at Al-Huda Senior High School in Pekanbaru, totaling 61 students, selected through total sampling techniques. Data collection was carried out through documentation and questionnaires. The research results showed that the implementation of the Merdeka Curriculum had an impact on the economics learning outcomes of students at Al-Huda Senior High School in Pekanbaru. Based on the findings, the implementation of the Merdeka Curriculum scored 78.01%, categorized as good, while the average score of students' economics learning outcomes was 78.25, categorized as sufficient. The correlation coefficient analysis indicated that the t-observed value was higher than the t-table value (5.278 > 1.67), which signifies a significant effect of the Merdeka Curriculum implementation on economics learning outcomes. The R Square value of 0.321 shows that 32.1% of the learning outcomes were influenced by the curriculum implementation, while the remaining 67.9% was influenced by other variables.
Analisis Kandungan Material Campuran Aspal Panas Mix Design AC-WC terhadap Rekonstruksi Jalan Ruas N-029.1 Bts. Kab. Muaro Jambi / Kab. Tanjabtim-Bts. Kab. Tanjabbar
Authors: Ayzadt Muhammad , Nurdin Ade , Bahar Fetty Febriasti
Published: September 2024

To obtain a good aggregate mixture, efforts are made to keep the gradation of the aggregate mixture in the middle of its specification range. Based on road reconstruction work on section N-029.1 Bts. Regency. Muaro Jambi / Kab. Tanjabtim – Bts. Regency. Tanjabbar is at the point (sta 16+000 – 16+400) where the asphalt that is spread has a soft/liquid texture, which can be seen from the process of compacting and leveling the asphalt layer which is carried out by operating with a number of passes that is not in accordance with what was planned during the trial mix. So it is necessary to carry out an analysis to evaluate the material composition of the hot mix asphalt design layered by Asphalt Concrete-Wearing Course (AC-WC). The method used is to use secondary data analysis methods in the form of DMF, JMF and gradation data. The results of the analysis of the composition of the hot asphalt mix material show that there are differences in the total proportion value of the mixture, where in the DMF the planned proportion is 32.97% for fine aggregate, 28.26% for medium aggregate, 18.84% for coarse aggregate, 1.88 % for filler, and 5.80% for asphalt. At JMF the proportion of results from weighing is 37.68% for Hot Bin I (fine aggregate), 35.80% for Hot Bin II (medium aggregate), 18.84% for Hot Bin III (coarse aggregate), 1.88% for filler, and 5.80% for asphalt. In field implementation, the proportion of the total mixture produced was 17.90% for Hot Bin III (coarse aggregate), 33.91% for Hot Bin II (medium aggregate), 40.51% for Hot Bin I (fine aggregate), 1, 88% for filler, and 5.81% for asphalt.
Implementasi Building Information Modeling (BIM) terhadap Mutual Check 100 pada Pekerjaan Struktur Proyek Rusun Asrama Polisi Pingit Yogyakarta
Authors: Sianturi Niel Tamsoju , Pahang Putra I Nyoman Dita
Published: September 2024

Along with the development of Industry 4.0 technology, Building Information Modeling (BIM) has emerged as an innovation in planning, designing, and executing construction projects. BIM is a technological concept with methods and workflows based on project work information, all integrated into a digital model, which is then translated into a three-dimensional representation to enhance building design and construction productivity. In the Police Dormitory Apartment Project in Pingit, the need for quick and accurate calculations, cost projections, and volume of structural work is crucial. This can be easily realized through the application of Tekla Structures Building Information Modeling (BIM). It is expected that there will be a clear depiction of how BIM-based construction technology can be effectively utilized in this project. The method used is the BIM method with Tekla as the supporting software. From this modeling, it was found that the total cost of foundation work had a cost difference of IDR 19.973.729,42, which is 1,63%; the total cost of pedestal column work had a cost difference of IDR 13,713,600.03, which is 6,37%; and the total cost of sloof work had a cost difference of IDR 14.423.328,99, which is 6,06%. The total cost difference for all structural work on the foundation, sloof, and pedestal column was IDR 48.110.658,44, which is 2.86%. This suggests that the cost calculations using Tekla Structures are smaller compared to the MC100 work quantity.
Analisa Bangkitan Perjalanan di Wilayah Komplek Perumahan Safira Kota Jambi
Authors: Das Amsori M , Setiawan Ari , Wahyudi Danial
Published: September 2024

From data from BPS (Central Statistics Agency) Jambi City, the population of Jambi City in 2022 is 619,553 people with an area of 205.38 km2, has 11 sub-districts. Safira Housing is one of the housing complexes located in Talang Bakung Village, Paal Merah District, Jambi City. Population Safira housing ± 455 people. The increase in trips made by a number of Safira housing communities will cause traffic jams during peak hours such as when leaving and returning from work. This research method uses multiple linear regression with independent variables consisting of the number of family members X1, the number of family members who work X2, number of family members attending school x3, with trip generation as variable Y and then analyzed using the SPSS application. The variable that has a dominant influence on the dependent (dependent) variable is based on the standardized coefficient beta value, namely the variable number of family members attending school/college (X3), number of family members (X1), and number of working family members (X2). The trip generation analysis model at Safira Housing is: Y 2.257 + 0.275 X1 + 0.227 X2 + 0.528 From this model, the factors that influence the generation of Safira Housing trips are obtained, namely the number of family members (X1), the number of family members who work (X2), the number of family members who go to school/college (X3). Based on the R Square value of 0.621, this means that 62.1% of trip generation at Safira Housing is explained by the independent variables in the form of number of family members, number of family members working, number of family members attending school/university.
Studi Probabilitas Pemilihan Moda Transportasi Kereta Api Eksekutif Gajayana dan Kereta Api Eksekutif Jayabaya dengan Rute Jakarta-Malang
Authors: Putra Dewangga Andya Mahendra , Utomo Nugroho , Estikhamah Fithri
Published: September 2024

The train is a means of land transportation that continues to experience improvements in its services. Services and regulations change with the times, thus making PT. The Railways are making efforts to improve quality in terms of service, comfort and safety where all trains use AC facilities and eliminate all hawkers who sell on trains and at train stations in order to provide comfort to passengers. From these changes, each mode of transportation, especially the Gajayana Executive Train and the Jayabaya Executive Train, has different characteristics in terms of travel time and travel fare. Therefore, the aim of this research is to determine the probability of train selection based on the factors reviewed by distributing questionnaires and using the Stated Preference method to obtain primary data. The data obtained was then analyzed using Binomial Logit regression with Microsoft Excel software. From this research, significant results were obtained regarding the probability value of choosing a mode of transportation based on the difference in ticket prices of IDR. 40,000,- then the PKAG probability value is 0.226 and the PKAJ probability value is 0.774. So it can be concluded that respondents have more interest in the Jayabaya Executive Train because ticket prices are cheaper than the Gajayana Executive Train. Meanwhile, the probability value for choosing a mode of transportation is based on the travel time difference of -62 minutes, so the PKAG probability value is 0.904 and the PKAJ probability value is 0.096. So it can be concluded that respondents have more interest in the Gajayana Executive Train because the travel time is faster.
Pengaruh Penambahan Serat Ampas Tebu Sebagai Tulangan Micro pada Beton
Authors: Itteridi Vike , Edowinsyah Edowinsyah , Andreson Ganda
Published: September 2024

Based on this research, concrete has high compressive strength but low flexural strength. There-fore, the addition of sugarcane bagasse fibers is carried out as an additive to overcome the low flexural strength issue in concrete. This study aims to determine the effect of adding sugarcane bagasse fibers on the characteristics of concrete, including compressive and flexural strength. Fiber-reinforced concrete is a composite material consisting of regular concrete and other mate-rials, such as natural or artificial fibers. The method used in this research is an experimental method, adding 1% of sugarcane bagasse fibers by weight of cement to the normal concrete with a target strength of F'c 19.3 MPa and fiber length of 5 cm. The samples used in this research are concrete cylinders and beams tested using a Universal Testing Machine. The research results show that the optimum compressive strength of normal concrete is 20.36 MPa at 28 days of age. Meanwhile, for fiber-reinforced concrete BSTC and BSTH, the compressive strengths are 17.83 MPa and 16.49 MPa, respectively, indicating a decrease compared to the normal concrete. This decrease is attributed to the addition of sugarcane bagasse fibers, which are lightweight addi-tives and not solid aggregates, resulting in some voids in the sugarcane bagasse fibers. The re-sults of the flexural strength testing show that the optimum flexural strength of BSTC is 4.44 MPa, and for BSTH, it is 4.09 MPa, while the normal concrete (BN) only achieves 3.61 MPa. This is due to the increased bonding effect in concrete caused by the addition of fibers, which helps to resist the occurrence of cracks during flexural testing
Derajat Kepadatan Lapis Pondasi Agregat Tanpa Penutup Aspal Menggunakan Metode Sand Cone pada Proyek Rekonstruksi Jalan Kecamatan Serai Serumpun, Kabupaten Tebo di Ruas Jalan Tanjung Aur Seberang-Malako Tinggi
Authors: Yumardi Yumardi , Wijaya Sucitra , Kutni Darul , Rianto Doli Jumat , Marwadi Aji
Published: September 2024

Road infrastructure is very important for the economic progress of Tanjung Aur Seberang village residents. Economic development in Tanjung Aur Village, Tebo Regency has significantly increased traffic levels. If this is not balanced by improving the quality of transportation facilities and infrastructure, then this could cause serious problems. Determining the value of the degree of density of the foundation layer aggregate (soil) class S  in obtaining soil stability with safe conditions in accordance with the requirements of density standards is the aim of this research. The methods used are direct tests in the field and in the laboratory. Testing soil density in the field using a sand cone tool follows the provision stated in  SNI 03-2828-1992, while testing soil density in the laboratory follows the provisions stated in SNI 1742-2008. Soil density testing intervals vary between 50 meters, 75 meters, 100 meters, 150 meters, 200 meters depending on location conditions. The results sand cone testing was carried out on roads from STA 2+000 to 3+800. In the first test with 9 test points, the field density was obtained below 95%, namely STA 2+100 (94,141%), STA 2 +550 (94,389%) and STA 3 +800 (94,289). Theses results indicate that the required standard degree of field density has not been achieved, so that the base layer of class S aggregate  can be added and compaction can be carried out again. And from STA 0 + 005 to 4 + 200 in the second test with 26 test points. Test results using a sand cone tool show that the average water content value is 7.513% with a density reaching 98.846%. and these results were in accordance with applicable standard requirements.
Biaya dan Waktu pada Pelaksanaan Pekerjaan Struktur Balok Precast dan Balok Konvensional
Authors: Purnawirati I.G.A. Neny , Herlambang Fajar Surya
Published: September 2024

Concrete is a construction material that is widely used in Indonesia, when compared to the use of wood and steel materials, there are two methods of concrete work, namely the conventional method and the precast method. In the Kuta Art Market Development Project there are several blocks using the conventional method and some using the precast method. How to compare the cost and time of conventional beam work and the precast method and which method is more effective to use. To be able to determine the choice of the right method to use, an analysis of costs and implementation time is carried out. Furthermore, the results of the analysis are compared so as to get an effective method to use. From the results of the analysis carried out at the Kuta Art Market Development Project, a comparison of costs and implementation time obtained that the total cost for the work of 5 conventional blocks was IDR 47,656,004.04 and the time needed to complete the work of 5 conventional blocks was 5 days. Whereas the total cost required for the work of 5 precast beams is Rp. 46,006,742.42 and the time required to complete the work of 5 precast beams is 4.09 days. When compared, the cost of precast beam work is Rp. 1,649,301.32 (3.5%) cheaper and the execution time for precast beam work is 0.91 days (18%) faster than conventional beam work.
Analisis Faktor yang Mempengaruhi Keberhasilan Kerjasama Kontraktor dengan Pemasok Ready Mix Pembangunan PSU Jalan Penghubung pada Perumahan Skala Besar Kota Jambi
Authors: Asri Budi Irwan , Wahyudi Wahyudi , Martalius Martalius
Published: September 2024

Limited resources require contractors to cooperate or collaborate to be able to participate in the connecting road construction project in large-scale housing in Jambi City, the quality requirements of the concrete used require contractors to use ready mix concrete. Ideally, cooperation is the most innovative way to anticipate limited resources and reduce disputes. However, obstacles such as weak cooperation, lack of trust, and ineffective communication are caused by different backgrounds and it is not easy to unite in a team. Therefore, knowledge of the factors leading to the success of cooperative relations is required. Based on this. The purpose of this study is to identify the dominant factors and factors that influence the success of contractor cooperation with ready mix suppliers for the construction of connecting road PSUs in large-scale housing in Jambi City, as well as determining efforts to improve the success of cooperation between contractors and ready mix suppliers for the construction of connecting road PSUs in large-scale housing in Jambi City. The analysis method is carried out with the application of the Statistical Package for the Social Sciences (SPSS). This study used quantitative methods by distributing questionnaires to respondents. The results of the research conducted there are 7 factors that influence the success of contractor cooperation with ready mix suppliers for the construction of PSU connecting roads in large-scale housing in Jambi City, namely communication factors, trust factors, commitment factors, role and responsibility factors, management support factors, information and resource factors, and common goal factors.
Pengaruh Penambahan Asbuton LGA 50/30 pada Campuran AC-WC dengan Inovasi Limbah Styrofoam
Authors: Ramadhan Luthfiano Ikhsan , Pristyawati Tantin , Devi Rida Handiana
Published: September 2024

Indonesia’s road infrastructure requires 1.2 million tons of asphalt annually, but Pertamina can only supply 600,000 tons. This deficit compels the government and related stakeholders to seek alternatives to meet national asphalt needs and maintain road quality. This study aims to analyze the effects of adding Asbuton LGA 50/30 to Asphalt Concrete Wearing Course (AC-WC) with an innovative use of styrofoam waste. Experimental research was conducted to evaluate Marshall characteristics, including VMA (Void in Mineral Aggregate), VIM (Void in Mix), stability, VFA (Void Filled with Asphalt), and Marshall Quotient (MQ). Five styrofoam waste mix variations were tested at 2%, 4%, 6%, 8%, and 10% levels. For the 8% Asbuton mix, the highest stability was observed with 10% styrofoam, yielding a stability value of 2032.16 kg, VMA of 16.63%, VFA of 78.28%, VIM of 3.61%, flow of 2.45 mm, and MQ of 830.33 kg/mm. For the 9% Asbuton mix, the highest stability was achieved with 2% styrofoam, resulting in a stability value of 1882.35 kg, VMA of 16.21%, VFA of 80.17%, VIM of 3.24%, flow of 2.57 mm, and MQ of 735.72 kg/mm. The 10% and 2% styrofoam variations proved to be the most effective for AC-WC asphalt mixtures, as their Marshall values met the 2018 Bina Marga General Specifications, indicating that these styrofoam waste additions are optimal for AC-WC asphalt mixtures.
Simulasi Jaringan Drainase Kawasan Desa Lubuk Suli Kec. Depati VII Kabupaten Kerinci Menggunakan Program EPA SWMM Versi 5.1
Authors: Putri Ade Kurnia , Rahmawati Devit , Nasution Ari Endra
Published: September 2024

One of the areas in Kerinci Regency that is often hit by floods is Lubuk Suli Village.  Flooding was caused by overflowing water from the Batang Marao river. The main objective of this research is to provide information to the relevant government about good drainage for the Lubuk Suli Village Area using existing data and planning data by simulating the capability of the Drainage Network for the Lubuk Suli Village Area using the EPA SWMM 5.1 program. The data used in this research are land use maps to determine the percentage of impervious area, rainfall data and drainage channel dimension data in the area. The rain data series used is hourly rain data. Due to the absence of hourly rainfall data at the rain station at the research location, hourly rainfall distribution was determined by changing the Intensity-Duration-Frequency (IDF) curve for a 5 year return period into a planned rainfall hyetograph using the Alternating Block Method (ABM). After all parameters have been input into EPA SWMM 5.1. Simulation can be done. The simulation quality is quite good if the continuity error for surface runoff and flow tracing is > 10%. The simulation carried out in this research is divided into 2 scenarios, namely with existing data and additional storage. From the simulation results, it was found that in the 2 scenarios, the number of flood points in the simulation for scenario 1 was 6 points and in scenario 2 there were 5 points. This shows that the drainage planning design for the Lubuk Suli Village area has not been able to overcome the existing drainage load in the area.
Strategi Harga Penawaran Tender pada Proyek Konstruksi Dengan Memperhitungkan Faktor Resiko
Authors: Wulandari Annisa , Handayani Elvira , Dony Wari
Published: September 2024

To get a construction project through a process called a tender (auction). This process is very crucial in determining the party who will carry out the construction project. For this reason, a strategy is needed, one of which is determining the offering price. The bid price really determines the possibility of winning a construction project as well as the size of the profit or profit on the construction project. One of the problems that is often encountered is determining the offering price which should not be too high or too low. The aim of this research is to analyze the mark up value in construction project tenders at the Jambi City Electronic Procurement Institute (LPSE) using the Friedman Method, Gates Method, and Ackoff & Sasieni Method bidding strategy approaches and compare the strategic approaches that produce optimum mark up values so that can be used as an alternative in determining the offering price. The data used in this research is auction data for construction work that has been completed at Electronic Procurement Institute (LPSE) Jambi in 2022 using three statistical approaches, namely multi discrete distribution, multi normal distribution and single normal distribution. In this research it can be concluded that the Friedman Method and Ackoff & Sasieni Method produce the lowest optimum mark up value, while the Gates Method produces the highest optimum mark up value.
Analisis Faktor-Faktor Penyebab Terjadinya Perubahan Desain dan Pengaruhnya terhadap Cost overrun Proyek Konstruksi di Jambi
Authors: Azanna Dwitya Okky , Handayani Elvira , Andreawan Muhammad Fiqh
Published: September 2024

This research aims to prove empirically the factors that cause design changes and the impact of cost overruns on construction projects. The data collection technique used was primary data collection with a sample of 10 respondents taken from contractor project staff of construction projects in Jambi City. The sampling technique in this research used probability sampling and stratified random sampling methods. Data analysis processing in this study used IBM SPSS 28. The final results of this analysis found that the causative factor of design changes because of owner or contractor. The most dominant design change factors caused by the owner were delays in providing goods that should have been provided by the owner at 48.48%, temporary suspension at 42.85%, and termination of construction contracts at 56.81%. Apart from that, other dominant factors in design changes caused by contractors are delays in providing design drawings for construction that have been approved, amounting to 62.5%, design/specification defects equal in value to the number of addendums issued at the implementation stage, namely 60.60%, final failure of contractor/subcontractor performance was 64.51%.
Development of Biomedical Technology from the Perspective of Ethics and Law
Authors:   School of Political Science and Law, Xinjiang Normal University, China, Sun Zhangsheng , Zhang Kexin
Published: September 2024

The normative and safeguarding role of ethics and law in the development of biomedical science and technology, as well as their importance in promoting the progress of the industry, analyzed the key role of ethics and law in the field of biomedical science and technology, by restricting scientific research behavior, protecting the rights and safety of subjects, providing a solid guarantee for scientific research activities, and promoting the healthy development of biomedical science and technology. At the same time, the positive role of ethics and law in promoting international cooperation and exchange of biomedical science and technology is also discussed, which will inject strong impetus into the global development of biomedical science and technology. In addition, through case analysis, the paper demonstrates the key role of ethical review in the field of biomedical science and technology, as well as the importance of law in maintaining market order, protecting subjects' rights and interests, and fairness and justice. The successful practice of ethics and law in the development of biomedical science and technology is emphasized, which proves that following ethical principles and legal framework is the key factor to promote the progress of biomedical science and technology. This paper explores the important role of ethics and law in the development of biomedical science and technology, and provides valuable reference and guidance for practitioners in the industry. By following ethical principles and legal norms, we will jointly promote the prosperity and development of biomedical science and technology, and contribute to the common progress of human health.
Хелатна сполука ГАМК покращує антиоксидантний захист мітохондрій мозку щурів за умов гіпоксії
Authors: Гончар О. О. , Клименко О. О. , Маньковська І. М.
Published: September 2024

У наш час постійно збільшується кількість і вірогідність розвитку патологічних станів, пов’язаних з нестачею кисню. Окисний стрес мітохондріального походження вважається одним із провідних патогенетичних механізмів тканинних пошкоджень при різних типах гіпоксії. Тому пошук препаратів з антигіпоксичною й антиоксидантною дією залишається актуальним.
Мета дослідження – вивчення впливу профілактичного введення Мембратону на прооксидантно-антиоксидантний гомеостаз у мітохондріях мозку щурів за умов гострої гіпоксичної гіпоксії.
Мембратон® (ФАРКОС, Україна) є препаратом метаболічної дії, до складу якого входить хелатна сполука магнію глюконату з гамма-аміномасляною кислотою та вітамін В6 (піридоксину гідрохлорид). Перевагою цього препарату серед існуючих з подібним складом є те, що хелатні сполуки мають природну структуру, завдяки чому вони біологічно активні та швидко засвоюються.
Було показано, що профілактичне введення Мембратону (7,16 мг/кг) щодня впродовж 7 днів зменшувало вміст вторинних продуктів перекисного окиснення ліпідів і перекису водню, підвищувало активність антирадикального ферменту Mn-супероксиддисмутази, що свідчить про послаблення окисних процесів за умов гострої тяжкої гіпоксичної гіпоксії. Це відбувалося на тлі підвищення вмісту відновленого глутатіону, зростання активності антиперекисного ферменту глутатіонпероксидази та тенденції до зростання активності глутатіонредуктази в мітохондріях мозку тварин.
Таким чином, профілактичне введення Мембратону мало коригуючий вплив на прооксидантні процеси, нормалізувало активність антиоксидантних ферментів і стан глутатіонової системи мітохондрій мозку щурів, що зменшувало вираженість окисного стресу, викликаного дією гострої гіпоксії. Мембратон показав себе як ефективний адаптоген для підвищення стійкості організму до вільнорадикальних процесів гіпоксичного генезу.
До 100-річчя кафедри фармакології: від Харківського хіміко-фармацевтичного інституту до Національного фармацевтичного університету
Authors: Штриголь С. Ю. , Риженко І. М. , Жаботинська Н. В.
Published: September 2024

Національний фармацевтичний університет, м. Харків