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In this work, epoxy nanocomposite was prepared with the inclusion of unfunctionalized as-received GNPs (ARGNPs) and functionalized GNPs using surfactant Tween 80 (T80GNPs) in the epoxy resin using a mechanical stirrer. ARGNPs were used as it is, while T80GNPs were prepared through the adsorption of surfactant onto GNPs’ surface using a sonication procedure in an ultrasonic bath. Characterization of nanoparticles using SEM shows that ARGNPs indicated a softer image representing a thinner layer of graphene stacks compared to T80GNP which has a tangible solid-looking image resulting from the sedimentation during the process of fltration. Elementally, both ARGNPs and T80GNPs were found to contain carbon, oxygen, and sulfur, as indicated by the EDX spectrum, with the C/O ratio for T80GNPs being 34.7% higher than that for ARGNPs, suggesting the adsorption of Tween 80 molecules on the GNPs after functionalization. FTIR spectroscopy confrms the attachment of Tween 80 molecules on GNPs surface with T80GNPs spectrum indicated higher peak intensity than ARGNPs. Flexural testing demonstrated that the addition of 0.9 wt.% ARGNPs and 0.9 wt.% T80GNPs to the epoxy increased the modulus of the nanocomposites to 72.1% and 82.6%, respectively, relative to neat epoxy. With the same amount of particle content, both nanocomposites showed increased strength, with ARGNPs and T80GNPs exhibiting strengths of 70.5% and 87.8%, respectively, relative to neat epoxy more...

Recent decades have seen a substantial increase in interest in research on natural fibres that is aligned with sustainable development goals (SDGs). Due to their renewable resources and biodegradability, natural fiberreinforced composites have been investigated as a sustainable alternative to synthetic materials to reduce the usage of hazardous waste and environmental pollution. Among the natural fibre, jute fibre obtained from a bast plant has an increasing trend in the application, especially as a reinforcement material. Numerous research works have been performed on jute fibre with regard to reinforced thermoset and thermoplastic composites. Nevertheless, current demands on sustainable materials have required new developments in thermoplastic composites. In this paper, the author reviews jute plants as reinforcement materials for thermoplastic matrix polymers. This review provides an overview of the sustainability of jute plants as reinforcement material for thermoplastic matrix polymers. The overview on jute based thermoplastic composites focused on the thermal behavior and mechanical properties. Apart from physical, chemical, and mechanical properties, the study also covers the current and perspectives for future research challenges faced by the researchers on jute fibre reinforced thermoplastic composites. more...

Homogeneous charge compression ignition (HCCI) is an advanced combustion strategy proposed to provide higher efficiency and lower emissions than conventional compression ignition. Nevertheless, the operation of HCCI engines still presents formidable challenges. Preparing homogeneous mixtures and controlling the combustion phase are crucial challenges in the context of engine performance. Piston bowl geometry significantly enhances the process by improving the flow and facilitating air-fuel mixing for combustion. On that note, this study utilised the CFD simulation methods to analyse HCCI combustion in port fuel injection (PFI) mode and evaluate the effect of piston bowl geometries on engine performance. For this purpose, the CFD simulation result for a single-cylinder, four-stroke YANMAR diesel engine was validated with experimental data. The different piston bowl geometries with the same volume, compression, and equivalence ratio were then investigated numerically. The validation result of the CFD simulation offers enough confidence to continue the study with different piston bowl geometries. The results attained from the Direct Injection (DI) engine piston bowl application demonstrate a minor change in in-cylinder pressure and heat release rate. The piston bowl design employed in a Port Fuel Injection engine application exhibited different combustion phases while demonstrating similarity in attaining in-cylinder pressure. The findings for swirl induce piston bowl design indicate an enhancement of in-cylinder pressure for the Spiral Crown geometry model, reaching 9.42 MPa. The results of the study demonstrated that the piston bowl's design affected the performance of an HCCI engine. more...

Open cathode proton exchange membrane fuel cells (OC-PEMFC) are devices that produce electrical energy through an electrochemical reaction between hydrogen and oxygen gas. Rapid load changes often lead to fluctuations in the flow of hydrogen entering the OC-PEMFC system. Increased load directly correlates with higher hydrogen gas consumption. However, if there is a delay in adjusting the gas flow rate to changes in load, it can trigger fluctuations in the amplitude and frequency of the output voltage. This fluctuation ultimately disrupts the stability of the power supply to the load, and reducing efficiency. Therefore, this paper presents a novel hybrid system that integrates wavelet and clipping techniques to regulate a more stable hydrogen flow, enhancing efficiency and accuracy under constant load conditions. A wavelet control system is used to mitigate noise, coupled with amplitude limitation through clipping techniques. This control system is implemented in OC-PEMFC model that is validated with experimental data. The performance analysis of this hybrid system reveals a 1.95 % increase in efficiency and attains high accuracy, as evidenced by a low ISE value of 0.028 during interference. more...

Creating environmentally friendly materials like polymer matrix composites (PMCs) enhanced with natural fillers has grown in recent decades. It supports the United Nations sustainable development goals (SDGs) by reducing the reliance on non-renewable resources, minimizing waste generation, and promoting sustainable land and water management practices. This investigation assesses the viability of employing Elaeocarpus ganitrus (rudraksha) seeds as a filler (rudraksha seed filler [RSF] in environmentally sustainable composite materials. Various loading concentrations and sizes of RSFs were incorporated by hand lay-up into polymer epoxy resin (ER). The effect of filler on the mechanical properties of composites was observed. Thermal properties of RSF/epoxy composites were investigated using thermogravimetric analysis (TGA) and Fourier transform infrared (FTIR). The 10 wt% 100-mesh filler had the maximum tensile strength (TS) at 42.30 MPa and flexural strength (FS) at 87.4 MPa, surpassing other filler sizes and loading concentrations. Meanwhile, the highest impact properties have been achieved with 20 wt% of RSF with 0.436 J. The results of this study highlight the significant impact of filler type and concentration on the mechanical properties of the material. These findingsoffer valuable insights that may be applied to various industrial contexts. Furthermore, incorporating 10% up to 30 wt% RSF in epoxy composites has brought more thermal stability than virgin epoxy. It revealed that the RSFs possess higher decomposition temperatures than the epoxy matrix. RSF has a potential sustainable reinforcement in polymer composites and holds great promise for addressing environmental challenges and aligning with several SDGs. more...

Yudisia Ausi,1 Vycke Yunivita,2 Prayudi Santoso,3,4 Deni Kurniadi Sunjaya,5 Melisa Intan Barliana,1,6 Rovina Ruslami2 1Department of Biological Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Sumedang, West Java, Indonesia; 2Division of Pharmacology and Therapy, Department of Biomedical Sciences, Faculty of Medicine, Universitas Padjadjaran, Bandung, West Java, Indonesia; 3Division of Pulmonary and Critical Care, Department of Internal Medicine, Faculty of Medicine, Universitas Padjadjaran, Bandung, West Java, Indonesia; 4Hasan Sadikin General Hospital, Bandung, West Java, Indonesia; 5Department of Public Health, Faculty of Medicine, Universitas Padjadjaran, Bandung, West Java, Indonesia; 6Center of Excellence for Pharmaceutical Care Innovation, Universitas Padjadjaran, Bandung, West Java, IndonesiaCorrespondence: Melisa Intan Barliana, Department of Biological Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Jl. Raya Bandung Sumedang KM 21, Sumedang, West Java, 45363, Indonesia, Email melisa.barliana@unpad.ac.idBackground: Multidrug-resistant tuberculosis presents a challenging obstacle in global TB control. It necessitates complex and long-term therapy, which can potentially lead to medication-related burdens that may ultimately reduce therapy adherence and quality of life.Purpose: This study aimed to gain a deep understanding of the medication-related burdens experienced by multidrug-resistant tuberculosis patients.Methods: The study was conducted using a convergent mixed-method approach involving MDR-TB patients and their caregivers. Qualitative data were collected through semi-structured in-depth interviews, while quantitative data were gathered using the validated Living with Medicine Questionnaire 3. In the quantitative part, associations between patients’ characteristics and burden levels were analysed using bivariate and multivariate analyses.Results: Seventy-four participants were involved in the study, with 71 of them completing the quest more...

The objective of this research is to analyze the influence of Trust, Motivation, and Service on Customer Satisfaction both partially and simultaneously. The research method used in this study is quantitative. The population of this study comprises 10,597 customers, with a sample size of 100 customers. The sampling technique used is random sampling, and data collection methods include questionnaires and interviews. The data analysis technique employed is multiple linear regression analysis. The study results show that the calculated t-value for trust is greater than the critical t-value and the significance value is less than 0.05, specifically, tcount>ttablet_{count} > t_{table}tcount?>ttable? and sig.<0.05sig. < 0.05sig.<0.05 or 0.291<1.9850.291 < 1.9850.291<1.985 and 0.772>0.050.772 > 0.050.772>0.05. This indicates that trust does not have a significant partial effect on customer satisfaction. The calculated t-value for motivation is greater than the critical t-value and the significance value is less than 0.05, specifically, tcount>ttablet_{count} > t_{table}tcount?>ttable? and sig.<0.05sig. < 0.05sig.<0.05 or 2.402>1.9852.402 > 1.9852.402>1.985 and 0.018<0.050.018 < 0.050.018<0.05. This indicates that motivation has a significant partial effect on customer satisfaction. The calculated t-value for service is greater than the critical t-value and the significance value is less than 0.05, specifically, tcount>ttablet_{count} > t_{table}tcount?>ttable? and sig.<0.05sig. < 0.05sig.<0.05 or 2.770>1.9852.770 > 1.9852.770>1.985 and 0.007<0.050.007 < 0.050.007<0.05. This indicates that service has a significant partial effect on customer satisfaction. The study results show that the calculated F-value is greater than the critical F-value and the significance value is less than 0.05, specifically, Fcount>FtableF_{count} > F_{table}Fcount?>Ftable? and sig.&l more...

Found item isn't specific term for a particular type of property; it is a general term. Luqathah is an item that found at a public area. Taking luqathah is obligatory according Shafi'i Madhhab for saving the property of fellow Moeslim but it have to announced for a year. However, taking luqathah according Maliki Madhhab is makrooh because it is feared that there maybe negligence in matters there are required, such as announcing the found item to the public. Shafi'i Madhhab and Maliki Madhhab have the difference opinion about luqathah. Therefor, the purpose of this study is to find out what should the finder of found item do and what theese two madhhab think about the ownership of found item. Imam Malik and Imam Shafi'i both allow to use of luqathah. According to Imam Maliki, the announcement must be made if there are no people take the luqathah as long as a year. The finder of luqathah have a responsibilty to compensate the item that used or donated. Shafi'i and Malik agree if the luqathah is priceless or doesn't have any valuable that no need to saved, but it must be saved and announced if the item has valuable so its owner known. more...

Islam as a religion has many branches of teachings, one of which is Shia. Shia is a sect of Islam based on the views of Sayyidina Ali (the fourth caliph) and his descendants. This sect emerged at the beginning of Khulafaurrasyidin’s leadership and has loyal followers. They believe Sayyidina Ali should become the successor caliph to the Prophet Muhammad SAW based on the Prophet’s will. Shia has developed into various sects and has become an issue that requires exceptional understanding and attention in Islamic studies. Debates and polemics often arise around Shiism, so it is essential to understand its various types and doctrines. This literature research discusses four Shiite sects: Shiite Itsna Asyariah, Shiiah Sab’iah, Shiiah Zaidiah, and Shiiah Ghulat. Shia Itsna ‘Asyariyah is a sect that recognizes twelve imams as Islamic community leaders and has the most prominent followers. Shiite Sab’iah recognizes seven imams. The Zaidiyah Shiites, whose name is Zaid bin Ali Zainal Abidin, have a moderate attitude in dealing with the issue of Ali bin Abi Talib’s leadership and in assessing the three previous caliphs. Meanwhile, the Ghulat Shiites tend to be extreme in supporting Ali. Abu Zahrah explained that the Ghulat Shiites are a group that places Ali in a position like God; some even have a higher concept than the Prophet Muhammad. This research aims to provide a broader understanding of various Shia sects. Understanding these schools provides many perspectives on how religious thought is formed, which needs to be considered, Islam as a religion has many branches of teachings, one of which is Shia. Shia is a sect of Islam based on the views of Sayyidina Ali (the fourth caliph) and his descendants. This sect emerged at the beginning of Khulafaurrasyidin’s leadership and has loyal followers. They believe Sayyidina Ali should become the successor caliph to the Prophet Muhammad SAW based on the Prophet’s will. Shia has developed into various sects and has become an issue that requires exceptional understanding and attention in Islamic studies. Debates and polemics often arise around Shiism, so it is essential to understand its various types and doctrines. This literature research discusses four Shiite sects: Shiite Itsna Asyariah, Shiiah Sab’iah, Shiiah Zaidiah, and Shiiah Ghulat. Shia Itsna ‘Asyariyah is a sect that recognizes twelve imams as Islamic community leaders and has the most prominent followers. Shiite Sab’iah recognizes seven imams. The Zaidiyah Shiites, whose name is Zaid bin Ali Zainal Abidin, have a moderate attitude in dealing with the issue of Ali bin Abi Talib’s leadership and in assessing the three previous caliphs. Meanwhile, the Ghulat Shiites tend to be extreme in supporting Ali. Abu Zahrah explained that the Ghulat Shiites are a group that places Ali in a position like God; some even have a higher concept than the Prophet Muhammad. This research aims to provide a broader understanding of various Shia sects. Understanding these schools provides many perspectives on how religious thought is formed, which needs to be considered more...

Productive waqf is the main choice when people are in a slump of acute poverty. With productive waqf, it means that the existing waqf gets the main priority aimed at more productive efforts. Productive waqf is a medium to create economic justice and welfare, reduce poverty, develop social security systems, provide health care facilities, and develop education. This phenomenon makes the discussion of waqf productive, especially if it is associated with improving the economic welfare of the community which is very important to do. In this study, a qualitative research method with a phenomenological approach is used. Meanwhile, the study method used is a method in the form of an analytical explanatory descriptive study. With this approach, the researcher tries to understand the model of productive waqf empowerment in Indonesia, in empowering the economic welfare of the community. The models that will be studied from the empowerment of productive waqf in Indonesia are: the model of productive waqf empowerment in the management of investing Waqf Assets, Waqf investment has great potential to be developed in Indonesia. Because with this waqf model, the mobilization reach will be much more evenly distributed to community members compared to the traditional-conventional waqf model, namely in the form of physical property that is usually carried out by relatively capable families. Keywords: Waqaf,; Welfare; Community; Economic Transformation, ABSTRAK   wakaf produktif merupakan pilihan utama ketika masyarakat sedang dalam keterpurukan kemiskinan akut. Dengan wakaf produktif, berarti wakaf yang ada memperoleh prioritas utama ditujukan pada upaya yang lebih menghasilkan. wakaf produktif merupakan media untuk menciptakan keadilan dan kesejahteraan ekonomi, mengurangi kemiskinan, mengembangkan sistem jaminan sosial, menyediakan fasilitas pelayanan kesehatan, dan mengembangkan pendidikan. fenomena inilah yang menjadikan pembahasan wakaf produktif, terutama jika dikaitkan dengan peningkatan kesejahteraan ekonomi masyarakat yang sangat penting untuk dilakukan. Dalam penelitian ini menggunakan metode penelitian kualitatif dengan pendekatan fenomenologis. Sedangkan metode kajian yang dipakai yaitu metode berupa kajian deskriptif eksplanatif analitis. Dengan pendekatan ini peneliti berusaha memahami model pemberdayaan wakaf produktif di Indonesia, dalam pemberdayaan Kesejahteraan ekonomi masyarakat. adapun model yang akan dikaji dari pemberdayaan wakaf produktif di Indonesia ini adalah: model pemberdayaan wakaf produktif dalam pengelolaan menginvestasikan Aset Wakaf, Investasi wakaf uang sangat potensial untuk dikembangkan di Indonesia. Karena dengan model wakaf ini, daya jangkau mobilisasinya akan jauh lebih merata kepada anggota masyarakat dibandingkan dengan model wakaf tradisional-konvensional, yaitu dalam bentuk harta fisik yang biasanya dilakukan oleh keluarga yang relatif mampu.   Kata Kunci: Waqaf,; Kesejahteraan; Masyarakat; Transformasi Ekonomi more...

Large language models can help to compile content with a cultural theme. However, any information generated by large language models needs to be evaluated to see the truth/fact of the information generated. With many studies discussing the comparison of the capabilities of large language models, there is not much research that directly discusses the comparison of the performance of large language models in producing Indonesian cultural content. This research compares the correctness of the information generated by the large language model using the expert judgment method when creating Indonesian cultural content and its fine-tuning capabilities evaluated using BERTScore. The evaluation method was successfully applied and the results show that in this case, PaLM-2 included less misinformation while GPT-3 excelled in fine-tuning. Using the combination of expert judgment and BERTScore makes it possible to evaluate large language models and obtain additional valid training data to correct deficiencies. The results showed that PaLM-2 produced more valid content with a score of 27 points, while GPT-3 scored 8 points. For training on new datasets/fine-tuning, it was found that the GPT-3 language model was able to learn the dataset more quickly, with a time of 50 minutes and a cost of IDR 27,000, while PaLM-2 took 2 hours 10 minutes and a cost of IDR 1,377,204. For the training dataset evaluation results, GPT-3 is superior with an average of all scores reaching 0.85205. Meanwhile, the PaLM-2 Tuned Model got an average overall score of 0.78942. In this case, the GPT-3 Tuned Model is superior by 8 %. In practice, this method can be used if the assessment is descriptive and requires direct assessment from experts more...

The prevalence of disability in Indonesia is considerable, necessitating a significant demand for prosthetic limbs in the country. In addition, the global demand for prosthetics continues to increase due to several factors such as wars, disasters, and the prevalence of chronic diseases. This article presents an overview of the manufacturing processes involved in the production of socket prostheses using natural fiber composite materials. Prosthetic sockets play an important role in meeting the needs of individuals who have undergone limb amputation. The findings from this study indicate that the manufacturing of prosthetic sockets requires consideration of characteristics such as comfort, functionality, biocompatibility, and flexibility. The utilization of natural fiber composites in the production of prosthetic sockets has several benefits, including cost-effectiveness, weight reduction, and biodegradation, making it a sustainable alternative for prosthetic socket fabrication. The utilization of natural fiber composites in the fabrication of socket prostheses has been the subject of much discussion, with particular emphasis on the influence of various matrices, reinforcing materials, and manufacturing methods on the characteristics and attributes of socket prostheses made from natural fiber composites. more...

This chapter presents four cases of urban garden projects in and around Copenhagen, Denmark, started between 2011 and 2013: Prags Have, Byhaven 2200, Byhaven Sundholm, and Havnehaverne. All four urban gardens were community-based and public, yet they varied widely in their organisation, management, funding, and status of the sites they occupied. While two of the gardens were started by cultural activists, the others were the initiative of the municipality and a private land developer. All of them shared a vision of not only growing produce but also integrating spaces for social inclusion and community gatherings. Looking into their underlying value system and organisational structure allows us to compare how the different typologies of urban gardens would impact their ability to thrive and flourish. The authors were particularly interested in the agendas pursued by the communities who managed them, how these agendas related to the specific site and context, and how the communities negotiated public access requirements with creating an enduring gardening community. As both bottom-up projects closed after 4 to 6 years, it is relevant to look into what resources were needed to run them and what led to their ultimate closure. more...

Itaconic acid is an emerging platform chemical with extensive applications. Itaconic acid is currently produced by Aspergillus terreus through biological fermentation. However, A. terreus is a fungal pathogen that needs additional morphology controls, making itaconic acid production on industrial scale problematic. Here, we reprogrammed the Generally Recognized As Safe (GRAS) yeast Yarrowia lipolytica for competitive itaconic acid production. After preventing carbon sink into lipid accumulation, we evaluated itaconic acid production both inside and outside the mitochondria while fine-tuning its biosynthetic pathway. We then mimicked the regulation of nitrogen limitation in nitrogen-replete conditions by down-regulating NAD+-dependent isocitrate dehydrogenase through weak promoters, RNA interference, or CRISPR interference. Ultimately, we optimized fermentation parameters for fed-batch cultivations and produced itaconic acid titers of 130.1 grams per liter in 1-liter bioreactors and 94.8 grams per liter in a 50-liter bioreactor on semipilot scale. Our findings provide effective approaches to harness the GRAS microorganism Y. lipolytica for competitive industrial-scale production of itaconic acid. more...

The Covid-19 pandemic has disrupted the world of education which has made schools implement online learning. This situation is very challenging for Physical Education (PE) course. The study purpose was to examine the condition of physical education online learning and the needs of teachers for electronic modules based on personalized system of learning instruction models in PE online learning. Materials and methods This study used Research and Development (R&D) method with qualitative and quantitative setting using questionnaire as an instrument. 61 of 86 respondents responded and filled out the questionnaire completely between 7-14 October 2021. Results Three main findings were highlighted in this study. Firstly, the condition of PE online learning has not been effective during the Covid-19 pandemic. Teachers experienced several obstacles in implementing PE online learning. Secondly, teachers need e-modules as material for student learning independently at home. Lastly, it is necessary to apply a personalized system of instruction learning model in PE online learning. This model is believed to be appropriate and effective as an independent learning model. Conclusions PE online learning has not been effective so far. An electronic module based on a personalized system of instruction is needed to support the implementation of PE online learning., La pandemia de Covid-19 ha trastocado el mundo de la educación y ha obligado a las escuelas a implementar el aprendizaje en línea. Esta situación es muy desafiante para el curso de Educación Física (EF). El propósito del estudio fue examinar la condición del aprendizaje en línea de educación física y las necesidades de los docentes de módulos electrónicos basados en sistemas personalizados de modelos de instrucción de aprendizaje en el aprendizaje en línea de educación física. Materiales y métodos Este estudio utilizó el método de Investigación y Desarrollo (I+D) con configuración cualitativa y cuantitativa utilizando el cuestionario como instrumento. 61 de 86 encuestados respondieron y completaron el cuestionario en su totalidad entre el 7 y el 14 de octubre de 2021. Resultados En este estudio se destacaron tres hallazgos principales. En primer lugar, la condición del aprendizaje en línea de educación física no ha sido eficaz durante la pandemia de Covid-19. Los docentes experimentaron varios obstáculos al implementar el aprendizaje de educación física en línea. En segundo lugar, los profesores necesitan módulos electrónicos como material para que los estudiantes aprendan de forma independiente en casa. Por último, es necesario aplicar un modelo de aprendizaje de sistema personalizado de instrucción en el aprendizaje de EF en línea. Se cree que este modelo es apropiado y eficaz como modelo de aprendizaje independiente. Conclusiones El aprendizaje de educación física en línea no ha sido efectivo hasta el momento. Se necesita un módulo electrónico basado en un sistema de instrucción personalizado para apoyar la implementación del aprendizaje de educación física en línea. more...

This research aims to analyze the improvement in life skills between teenagers who are given a life skills program and teenagers who are not given a life skills program in aquatic games at adolescence which are integrated with positive youth development. This research adopts a quantitative approach that integrates life skills and positive youth development through aquatic games. The population used in this research were students from the Aquatic Student Activity Unit (UKM) at Garut University and the research sample was determined using a total sampling technique using all 20 students who took part in the Aquatic UKM. The research instrument used was the life skills scale for sport (LSSS) questionnaire, development iThis instrument was given to samples with an age range of 17-21 years, namely teenagers, then the samples were randomly selected to determine the experimental and control groups between the groups that were given the life skills program and the groups that were not given the life skills program. This instrument contains 8 indicators of life skills, namely, teamwork, goal setting, time management, emotional skills, intrapersonal communication, social skills, leadership, problem solving and decision making.The data analysis used in this research includes the normality test, homogeneity test, and hypothesis test by processing the data using the statistical product for social science (SPSS) version 25 program. The research results were obtained with a calculated T value of 3,496 > T table 2,101, so Ho rejected and Ha accepted, so it can be concluded that there is an increase in life skills between teenagers who were given the life skills program and teenagers who were not given the life skills program. This confirms that the life skills program which is integrated with positive youth development through aquatic games has an important meaning in the quality of human resources in teenagers in carrying out their daily activities., Esta investigación tiene como objetivo analizar la mejora en las habilidades para la vida entre los adolescentes que reciben un programa de habilidades para la vida y los adolescentes que no reciben un programa de habilidades para la vida en juegos acuáticos en la adolescencia que se integran con el desarrollo juvenil positivo. Esta investigación adopta un enfoque cuantitativo que integra habilidades para la vida y el desarrollo juvenil positivo a través de juegos acuáticos. La población utilizada en esta investigación fueron estudiantes de la Unidad de Actividades Estudiantiles Acuáticas (UKM) de la Universidad Garut y la muestra de la investigación se determinó mediante una técnica de muestreo total utilizando los 20 estudiantes que participaron en la UKM Acuática. El instrumento de investigación utilizado fue el cuestionario Life Skills Scale for Sport (LSSS), desarrollo i. Este instrumento se aplicó a muestras con un rango de edad de 17 a 21 años, es decir, adolescentes, luego las muestras fueron seleccionadas al azar para determinar los grupos experimentales y de control entre los grupos que recibieron el programa de habilidades para la vida y los grupos que no recibieron el programa de habilidades para la vida. Este instrumento contiene 8 indicadores de habilidades para la vida, a saber, trabajo en equipo, establecimiento de metas, gestión del tiempo, habilidades emocionales, comunicación intrapersonal, habilidades sociales, liderazgo, resolución de problemas y toma de decisiones. El análisis de datos utilizados en esta investigación incluye la prueba de normalidad, prueba de homogeneidad. y prueba de hipótesis mediante el procesamiento de los datos utilizando el programa de producto estadístico para ciencias sociales (SPSS) versión 25. Los resultados de la investigación se obtuvieron con un valor T calculado de 3,496 > T tabla 2,101, por lo que Ho rechazó y Ha aceptó, por lo que se puede concluir que existe un aumento en habilidades para la vida entre los ado more...

The aim of this study was to develop students’ chemical literacy by integrating dilemma stories into a Science, Technology, Engineering, Arts, and Mathematics (STEAM) project on petroleum. Chemical literacy can help students face future challenges by applying what they learn at school to solve problems in their daily lives. A qualitative research method was employed that included interviews, observations, reflective journals, chemical literacy tests, and student activity sheets, as data collection tools. 106 secondary school students participated in the research using a project-based approach consisting of five steps: value reflection, problem-solving, project monitoring and evaluation, project development, and transformation. The five indicators of chemical literacy by Shwartz, Ben-Zvi, and Hofstein (2006); general scientific ideas, characteristics of chemistry, chemistry in context, higher-order learning skills, and affective aspect, the research found that the students’ chemical literacy abilities were significantly developed. This study uses a dilemma story to understand chemistry concepts whereby students can develop a project by integrating chemistry and STEAM principles. The STEAM Project involved making alternative fuel to find a solution to a problem presented in the dilemma story. The researchers were challenged by the need to find a suitable chemistry-based dilemma story to integrate with a STEAM project while also empowering students and managing time resources. more...

The purpose of the research was to determine the effect of movement modification in training on students' swimming competence. The research method used an experimental method with One Group Pre-test-Post-test Design. The population consisted of 71 students. The sample was taken as many as 10 students with purposive sampling technique. The tool used to collect data was the Swimming Competence Questionnaire (SCQ). The data collection technique consists of three parts: First, the initial test with SCQ; Second, treatment with movement modification; and third, the final test with SCQ. The treatment lasted for 16 training sessions, one training session per week, and 120 minutes per session. The training program consisted of warm-up, exercise, and cool-down. Data analysis techniques used, namely normality test, homogeneity test and hypothesis test. Based on the Paired Samples Test output, the Sig. (2-tailed) value = 0.000 was obtained, which is smaller than a = 0.05. Thus, Ho is rejected and Ha is accepted. The conclusion of this study, the provision of modifications in training can significantly affect the swimming competence of students., El propósito de la investigación fue determinar el efecto de la modificación del movimiento en el entrenamiento sobre la competencia de natación de los estudiantes. El método de investigación utilizó un método experimental con Diseño Pre-test-Post-test de un solo grupo. La población estuvo conformada por 71 estudiantes. La muestra se tomó hasta 10 estudiantes con técnica de muestreo intencional. La herramienta utilizada para la recogida de datos fue el Swimming Competence Questionnaire (SCQ). La técnica de recolección de datos consta de tres partes: Primero, la prueba inicial con SCQ; En segundo lugar, tratamiento con modificación del movimiento; y tercero, la prueba final con SCQ. El tratamiento tuvo una duración de 16 sesiones de entrenamiento, una sesión de entrenamiento por semana y 120 minutos por sesión. El programa de entrenamiento consistió en calentamiento, ejercicio y vuelta a la calma. Técnicas de análisis de datos utilizadas, a saber, prueba de normalidad, prueba de homogeneidad y prueba de hipótesis. Según el resultado de la prueba de muestras pareadas, la Sig. Se obtuvo un valor (de dos colas) = 0,000, que es menor que a = 0,05. Por tanto, se rechaza Ho y se acepta Ha. La conclusión de este estudio es que la provisión de modificaciones en el entrenamiento puede afectar significativamente la competencia en natación de los estudiantes. more...

La pandemia derivada del Coronavirus se ha convertido en un hecho de dimensiones globales y efectos multifacéticos. En términos generales ha significado una ruptura en las lógicas que sustentaban la vida cotidiana de las diferentes sociedades. Las medidas impulsadas por los gobiernos han trastocado tanto la forma de socializar como las maneras de llevar a cabo actividades específicas y cotidianas. Entre ellas se encuentra el proceso de enseñanza-aprendizaje de carácter presencial, el cual tuvo que digitalizarse ante el cierre de las instituciones educativas con la finalidad de reducir el contagio en la población (CEPAL y UNESCO, 2020; Grupo Banco Mundial, 2020). En el caso mexicano, el cierre de las instituciones educativas en marzo de 2020 vino a modificar la forma de aprender y enseñar. En este trabajo se observarán algunos resultados de un estudio cualitativo de inmersión a través de un instrumento diseñado para conocer las dimensiones y naturaleza de las implicaciones tecnológicas, psicológicas y sociales de los jóvenes universitarios de la Universidad Del Valle de México y la Universidad Tecnológica de México. more...

Saat ini, UMKM dalam melakukan pemasaran dan promosi bisnis menghadapi tantangan dan permasalahan. Dimana konsumen modern lebih cenderung melihat informasi produk berdasarkan brand dari suatu produk. Mereka lebih suka melihat kemasan yang menarik dari suatu produk. Sehingga, promosi produk banyak dilakukan pada promosi harga yang mengakibatkan kehilangan peluang dalam meningkatkan jumlah pelanggan. Melalui kegiatan pelatihan desain logo dan kemasan produk bagi pelaku UMKM menggunakan coreldraw merupakan solusi yang ideal untuk UMKM yang ingin mengatasi berbagai permasalahan pemasaran dan memanfaatkan potensi branding produk melalui logo dan kemasan yang menarik. Dengan fitur desain terbaik ditawarkan oleh coreldraw, UMKM dapat menciptakan logo dan kemasan sebagai branding memperkuat merek usaha, dan lebih kompetitif dalam dunia bisnis yang sejenis. tim pengabdian melakukan survey kepada pelaku UMKM, sesuai dengan hasil survey 86,6% pelaku UMKM menilai pelatihan branding produk dengan membuat logo dan kemasan produk sangat bermanfaat dan membantu dalam melakukan strategi promosi terhadap produk UMKM. more...

Background PIPAC is a recent approach for intraperitoneal chemotherapy with promising results for patients with peritoneal carcinomatosis. A systematic review was conducted to assess current evidence on the efficacy and outcomes of PIPAC in patients affected by ovarian cancer.Methods The study adhered to the PRISMA guidelines. PubMed, Google Scholar and ClinicalTrials.gov were searched up to December 2023. Studies reporting data on patients with OC treated with PIPAC were included in the qualitative analysis.Results Twenty-one studies and six clinical trials with 932 patients who underwent PIPAC treatment were identified. The reported first access failure was 4.9%. 89.8% of patients underwent one, 60.7% two and 40% received three or more PIPAC cycles. Pathological tumour response was objectivated in 13 studies. Intra-operative complications were reported in 11% of women and post-operative events in 11.5% with a 0.82% of procedure-related mortality. Quality of life scores have been consistently stable or improved during the treatment time. The percentage of OC patients who became amenable for cytoreductive surgery due to the good response after PIPAC treatment for palliative purposes is reported to be 2.3%.Conclusion The results showed that PIPAC is safe and effective for palliative purposes, with a good pathological tumour response and quality of life. Future prospective studies would be needed to explore the role of this treatment in different stages of the disease, investigating a paradigm shift towards the use of PIPAC with curative intent for women who are not eligible for primary cytoreductive surgery. more...

Vaginal approaches have become routine in the field of gynecologic surgery, whereas in general surgery vaginal wall transection is an infrequent practice typically reserved for extensive tumor resections. Approximately two decades ago, natural orifice transluminal endoscopic surgery ({NOTES}) revolutionized conventional boundaries by accessing the peritoneal cavity transorally, transrectally, or transvaginally, enabling general surgery without visible scars. Although transvaginal approaches have been successfully used for various abdominal procedures by general surgeons, a gap remains in comprehensive training to fully exploit the potential of this route. {PubMed}, Google Scholar, and Scopus databases were searched to retrieve relevant articles illustrating how general surgeons can adeptly manage vaginal approaches. The article presents a practical framework for general surgeons to execute a complete vaginal approach, addressing the management of vaginal specimen extraction and vaginal cuff closure, even in the absence of an experienced gynecologist. The evolution of abdominal surgery is moving towards less invasive techniques, emphasizing the importance of understanding the nuances and challenges associated with the vaginal route. This approach is linked to minimal oncological, sexual, and infective complications, and to the absence of pregnancy-related complications. Such knowledge becomes increasingly crucial, particularly with the renewed demand for transvaginal access in robot-assisted {NOTES} procedures. more...

Objective Lymph nodal involvement is a prognostic factor in endometrial cancer. The added value of para-aortic lymphadenectomy compared with pelvic nodal evaluation alone remains a matter of debate in the management of patients with intermediate- and high-risk endometrial cancer. A systematic review and meta-analysis was conducted to assess the prognostic value of para-aortic lymphadenectomy in terms of overall survival and disease-free survival in patients with intermediate- and high-risk endometrial cancer. Methods The study adhered to the PRISMA guidelines. PubMed, Google Scholar and ClinicalTrials.gov were searched from January 2000 to April 2023. Studies on intermediate- and high-risk patients who underwent pelvic versus pelvic and para-aortic dissection were included in the analysis. The Methodological Index for Nonrandomized Studies (MINORS) and the Quality Assessment of Diagnostic Accuracy Studies 2 tool (QUADAS-2) were used for quality assessment of the selected articles. Results Fourteen studies were identified, encompassing 9415 patients with a median age of 62 years (IQR 56.5-66.5). The majority had International Federation of Gynecology and Obstetrics stage I-II disease (76%) and endometrioid histology (89%). The 72% of patients who underwent only pelvic nodal evaluation and the 87% who underwent pelvic and para-aortic lymphadenectomy received adjuvant treatment (p=0.44). Pelvic and para-aortic lymphadenectomy was associated with a significant improvement in 5-year overall survival (RR=0.71, 95% CI 0.57 to 0.88, p<0.01), translating to a 41% reduction in the risk of overall death. However, no significant differences were observed in the 5-year risk of recurrence (RR=1.12, 95% CI 0.94 to 1.34, p=0.15). Additionally, patients undergoing pelvic and para-aortic lymphadenectomy experienced a 26% increased risk of post-operative complications (RR=1.26, 95% CI 1.04 to 1.53, p=0.03) and prolonged operative times (MD=56.27, 95% CI 15.94 to 96.60, p<0.01). more...

Objective Obesity represents an exponentially growing preventable disease leading to different health complications, particularly when associated with cancer. In recent years, however, an 'obesity paradox' has been hypothesized where obese individuals affected by cancer counterintuitively show better survival rates. The aim of this systematic review and meta-analysis is to assess whether the prognosis in gynecological malignancies is positively influenced by obesity. Methods This study adheres to PRISMA guidelines and is registered with PROSPERO. Studies reporting the impact of a body mass index (BMI) of >30 kg/m(2) compared with <30 kg/m(2) in patients with gynecological cancers listed in PubMed, Google Scholar and ClinicalTrials.gov were included in the analysis. The Quality Assessment of Diagnostic Accuracy Studies 2 tool (QUADAS-2) was used for quality assessment of the selected articles. Results Twenty-one studies were identified for the meta-analysis, including 14 108 patients with cervical, ovarian, or endometrial cancer. There was no benefit in 5-year overall survival for obese patients compared with non-obese patients (OR 1.2, 95% CI 1.00 to 1.44, p=0.05; I-2=71%). When pooling for cancer sub-groups, there were no statistically significant differences in 5-year overall survival in patients with cervical cancer and 5-year overall survival and progression-free survival in patients with ovarian cancer. For obese women diagnosed with endometrial cancer, a significant decrease of 44% in 5-year overall survival (p=0.01) was found, with no significant difference in 5-year disease-free survival (p=0.78). Conclusion According to the results of the present meta-analysis, a BMI of >= 30 kg/m(2) does not have a positive prognostic effect on survival compared with a BMI of <30 kg/m(2) in women diagnosed with gynecological cancers. The existence of the 'obesity paradox' in other fields, however, suggests the importance of further investigations with prospecti more...

Perkerasan aspal porus merupakan perkerasan lentur dimana menggunakan agregat kasar dengan proporsi jumlah yang banyak dari pada proporsi agregat halus untuk mendapatkan ruang atau pori-pori pada campuran. Aspal yang berpori menyebabkan nilai stabilitas pada campuran kecil sehingga pemanfaatannya terbatas. Pelaksanaan dan pemilihan gradasi yang baik akan meningkatkan kinerja campuran. Proses pemadatan pada suhu tertentu merupakan salah satu metode pelaksanaan yang dapat meningkatkan kinerja aspal porus. Penelitian ini bertujuan (1) Mendeskripsikan karakteristik bahan penyusun aspal porus yang ditinjau dari pengujian agregat kasar agregat halus filler serta pengujian aspal. (2) Mendeskripsikan suhu pemadatan optimum aspal porus menggunakan gradasi RSNI-2012 melalui uji Marshall Binder Drain Down Permeabilitas Cantabro Loss. Metode pada penelitian ini diawali dengan mempersiapkan peralatan dan bahan melakukan pengujian bahan membuat benda uji KAO selanjutnya melaksanakan pengujian marshall supaya mendapatkan nilai kadar aspal optimum. Dari nilai KAO dibuat benda uji dengan variasi suhu pemadatan dengan rentang suhu pemadatan 115 C 130 C 145 C 160 C dan 175 C yang selanjutnya dilakukan pengujian marshall permeabilitas binder drain down dan cantabro loss berdasarkan spesifikasi RSNI-2012. Hasil penelitian ini menunjukkan bahwa (1) Bahan yang digunakan dalam pencampuran aspal porus mencangkup agregat kasar agregat halus filler dan aspal telah memenuhi spesifikasi RSNI 2-2012. (2) kinerja campuran aspal porus meningkat seiring dengan kenaikan suhu pemadatan yang ditunjukkan dengan nilai stabilitas yang lebih baik namun berbanding terbalik dengan nilai VIM. Didapatkan suhu pemadatan optimum pada suhu 152 5 ordm C dengan nilai rata-rata stabilitas sebesar 406 08 kg flow sebesar 3 24 mm VIM sebesar 17 24% permeabilitas 0 044 cm/s binder drain down sebesar 0 060% dan nilai cantabro loss sebesar 18 6%. more...

Absorbed radiation doses are essential in assessing the effects, e.g. safety and efficacy, of radiopharmaceutical therapy (RPT). Patient-specific absorbed dose calculations in the target or the organ at risk require multiple inputs. These include the number of disintegrations in the organ, i.e. the time-integrated activities (TIAs) of the organs, as well as other parameters describing the process of radiation energy deposition in the target tissue (i.e. mean energy per disintegration, radiation dose constants, etc). TIAs are then estimated by incorporating the area under the radiopharmaceutical's time-activity curve (TAC), which can be obtained by quantitative measurements of the biokinetics in the patient (typically based on imaging data such as planar scintigraphy, SPECT/CT, PET/CT, or blood and urine samples). The process of TAC determination/calculation for RPT generally depends on the user, e.g., the chosen number and schedule of measured time points, the selection of the fit function, the error model for the data and the fit algorithm. These decisions can strongly affect the final TIA values and thus the accuracy of calculated absorbed doses. Despite the high clinical importance of the TIA values, there is currently no consensus on processing time-activity data or even a clear understanding of the influence of uncertainties and variations in personalised RPT dosimetry related to user-dependent TAC calculation. As a first step towards minimising site-dependent variability in RPT dosimetry, this work provides an overview of quality assurance and uncertainty management considerations of the TIA estimation. more...

The paper compares compression methods such as Lempel-Ziv-Welch (LZW), Huffman, and arithmetic coding applied to different large text and image datasets. Comparison is done based on metrics such as execution time and compression ratio. LZW produced results of about 30 % median compression ratio for all text records and a median of about 70 % for image records. In addition, Huffman coding produced a compression rate of about 40 % median for text data and a median of about 55 % for image data. Finally, arithmetic coding yielded results of about 70 % median for text compression and about 55 % median for image data compression. The time required was lowest for LZW, followed by Huffman, and worst for arithmetic coding. more...

By conducting two waves of large-scale surveys in the United Kingdom and Germany, we investigate the determinants of identity and inequality misperceptions. We first show that people substantially overestimate the share of immigrants, Muslims, people under the poverty line, and the income share of the richest. Moreover, women, lower-income, and lower-educated respondents generally have higher misperceptions. Only income share misperceptions are associated more with people who place themselves on the left of the political spectrum. In contrast, the other three misperceptions are more prevalent among those who place themselves to the right. We then attempt to correct misperceptions by conducting a classic controlled experiment. Specifically, we randomly assign respondents into a treatment group informed about their initial misperceptions and a control group left uninformed. Our results indicate that information treatments had some corrective effects on misperceptions in Germany but were ineffective in the United Kingdom. Moreover, information treatments in Germany were more effective for men, centrists, and highly educated respondents. There is also no evidence of spill-over effects: correcting one misperception does not have corrective effects for the other misperceptions. more...

Partnered men and women show consistently gendered patterns of labor market behavior. We test whether not only a person’s own gender, but also their partner’s gender shapes hours worked. We use Dutch administrative population data on almost 5,000 persons who had both male and female partners, whose hours worked we observe monthly over 15 years. We argue that this provides a unique setting to assess the relevance of partner’s gender for labor market behavior. Using two-way fixed effects and fixed-effects individual slopes models, we find that both men and women tend to work more hours when partnered with a female partner compared to a male partner. These results align with our hypothesis that a partner’s gender influences labor market behavior. For women, we conclude that this finding may be (partly) explained by marital and motherhood status. Additionally, we discovered that women decrease their hours worked to a lesser extent when caring for a child if they have a female partner. Finally, we found that for men, the positive association between own and partner’s hours worked is weaker when one has a female partner, indicating a higher degree of specialization within these couples. more...

Understanding social inequalities in parental health is crucial for family functioning and child development. Theoretically, the double burden of parenting and minority stress may lead to the negative association between parenthood and health outcomes being stronger for people in same-sex relationships. Moreover, drawn from the social control process and the compensation mechanism, the negative association between parenthood and health risk behaviors may become stronger for people in same-sex relationships. Yet, empirical evidence on parental health disparities between parents in same- and different-sex relationships is limited. Using linear and logistic regression models, coarsened exact matching, and entropy balancing on Dutch data between 2008 and 2021 (196 people in same-sex relationships and 6948 people in different-sex relationships), we investigate the relationship between parenthood and three health outcomes (self-rated health, physical health, and mental health) and two health risk behaviors (smoking and heavy episodic drinking). We find that parents on average are less likely to experience heavy episodic drinking than non-parents. The association between parenthood and health does not differ between people in same-sex and different-sex relationships. more...

This article introduces machine learning techniques to identify politically connected firms. By assembling information from publicly available sources and the Orbis company database, we constructed a novel firm population dataset from Czechia in which various forms of political connections can be determined. The data about firms' connections are unique and comprehensive. They include political donations by the firm, having members of managerial boards who donated to a political party, and having members of boards who ran for political office. The results indicate that over 85% of firms with political connections can be accurately identified by the proposed algorithms. The model obtains this high accuracy by using only firm-level financial and industry indicators that are widely available in most countries. These findings suggest that machine learning algorithms could be used by public institutions to improve the identification of politically connected firms with potentially large conflicts of interest. more...

The bond market has developed significantly over the last few decades. Bonds have become an increasingly reliable funding source for governments and corporations. Recent developments show that the bond market is increasing continuously, both in terms of its size and penetration. Even during the global financial crisis and the COVID-19 pandemic, when the world economy was experiencing a significant downturn, the bond market showed positive growth, helping to provide funds to address these crises. Despite this noteworthy development of the bond market, research into the association between the bond market and economic development is relatively limited in comparison to research on the relationship between the banking and equity market and the economy. For this reason, this thesis examines the relationship between the bond market and economic growth. More specifically, it investigates the bond-growth nexus from three interrelated dimensions, which give rise to three empirical studies. [...], Thesis (PhD Doctorate), Doctor of Philosophy, Dept Account,Finance & Econ, Griffith Business School, Full Text more...

Pasar modal di Indonesia sudah terbentuk sejak zaman penjajahan Hindia Belanda dan telah mengalami perkembangan signifikan. Banyak perusahaan yang terdaftar di pasar modal dan jumlah investor juga mengalami peningkatan yang signifikan. Investor di pasar modal biasanya mencari saham-saham dengan return tinggi dan risiko rendah. Dalam memilih saham, investor perlu berhati-hati dan memilih saham berkualitas dengan fundamental yang solid. Dalam menyusun portofolio investasi, investor perlu melakukan diversifikasi dan memilih kombinasi saham yang tepat. Salah satu metode yang dapat digunakan adalah analisis Single Index Model, yang membantu investor dalam menentukan portofolio optimal. Penelitian tentang portofolio optimal telah dilakukan di Indonesia, namun masih perlu penelitian lebih lanjut yang melibatkan beberapa indeks saham. Indeks saham sangat penting dalam pasar modal dan dapat digunakan sebagai tolak ukur kinerja pasar dan produk investasi. Selain di Indonesia, penelitian juga dilakukan di Pasar Modal Malaysia untuk memperkuat hasil yang didapatkan. Indeks KLCI, KLENG, dan KLFIN dipilih sebagai indeks utama yang digunakan dalam penelitian ini. Peneliti melakukan kombinasi analisis untuk menentukan portofolio optimal di Bursa Efek Indonesia dan Bursa Efek Malaysia. Tahapan yang dilakukan meliputi analisis Single Index Model secara parsial dan analisis gabungan pada indeks-indeks yang terdaftar. Dengan melakukan penelitian ini, diharapkan dapat memberikan informasi yang berguna bagi investor dalam memilih saham dan menyusun portofolio investasi yang optimal. Teori Portofolio dikembangkan oleh Harry Markowitz pada tahun 1952. Konsep utama dari teori ini adalah bahwa investor dapat meningkatkan keuntungan dan menghindari risiko dengan melakukan diversifikasi portofolio. Tujuan dari Portofolio Optimal adalah mencapai keseimbangan yang optimal antara risiko dan imbal hasil dalam pengelolaan investasi. Proses menciptakan portofolio optimal melibatkan analisis terhadap more...

This research aims to determine the influence of parenting patterns on the level of aggression in adolescents, as well as to determine the influence of parenting patterns and self-control on the level of aggression in adolescents. The research design uses explanatory quantitative research. The research subjects were students of SMK 1 Kuripan, SMA 5 Mataram and SMA 1 Gerung in West Lombok Regency, a total of 150 students consisting of 93 men and 57 women, carried out using a purposive sampling technique. The research procedure was carried out in 8 meetings using collaboration between the REB Group Counseling stages and the DIBS Technique stages. The research results show that the influence of parental parenting and self-control can have an aggressive influence with a percentage of 57.9%. Data analysis was carried out using path analysis, it was found that permissive parenting was positively correlated with aggressive behavior (r = 0.359, p = 0.000), authoritarian parenting was positively correlated with aggressive behavior (r = 0.384, p = 0.000), and authoritative parenting was correlated negative with aggressive behavior (r = -0.523, p = 0.000). This shows that there is a negative correlation between authoritative parenting and aggressive behavior., Penelitian ini bertujuan untuk mengetahui pengaruh pola asuh orang tua terhadap tingkat agresif pada remaja, serta untuk mengetahui pengaruh pola asuh orang tua dan kontrol diri terhadap tingkat agresif pada remaja. Rancangan penelitian menggunakan penelitian kuantitatif eksplanatif. Subjek penelitian siswa SMK 1 Kuripan, SMA 5 Mataram dan SMA 1 Gerung di Kabupaten Lombok Barat, sejumlah 150 siswa terdiri dari 93 laki-laki dan 57 perempuan, dilakukan dengan teknik purposive sampling. Prosedur penelitian dilakukan 8 kali pertemuan menggunakan kolaborasi tahapan Konseling Kelompok REB dengan tahapan Teknik DIBS. Hasil penelitian menunjukkan pengaruh pola asuh orang tua dan kontrol diri dapat memberikan pengaruh agresif dengan persentase 57,9%. Analisis data dilakukan dengan menggunakan path analysis, diperoleh pola asuh permisif berkorelasi positif dengan perilaku agresif (r =0,359, p = 0,000), pola asuh otoriter berkoralasi positif dengan perilaku agresif (r = 0,384, p = 0,000), dan pola asuh otoritatif berkorelasi negatif dengan perilaku agresif (r = -0,523, p = 0,000). Hal ini menunjukkan terdapat korelasi yang negatif antara pola asuh otoritatif dengan perilaku agresif. more...

The Role of Entrepreneur Knowledge and Self-Efficacy toward Technopreneurship: The Moderating Effect of Learning Strategies. Objective: To determine the effect of entrepreneur knowledge and self-efficacy on technopreneurship which is moderated by the learning strategy of Universitas Negeri Medan students. Method: This research was done using a quantitative approach with a survey method. The study population was students of the faculty of economics, the sample tehnique was random sampling and the number of selected samples was 198 respondents. Questionnaires were used to collect data from research participants for 15 days. The data were analyzed using moderate regression analysis (MRA) using SPSS. Findings: entrepreneur knowledge has a positive and significant effect on technopreneurship, self-efficacy has a positive and significant effect on technopreneurship. Learning strategy moderate the influence of entreprenur knowledge on tecunopreurship Furthermore, the learning strategy also moderates the effect of self-efficacy on technopreneurship. Conclusion:These findings imply that university managers, faculty, and entrepreneurship centers to review the intensity of technopreneurial activities so that students can benefit from these programs. Focusing more on direct experience rather than theory or classroom lectures will help students to understand more about technoprenership and thus choose technopreneurship as their career. Keywords: entrepreneur knowledge, self-efficacy, technopreneurship, learning strategies.DOI: http://dx.doi.org/10.23960/jpp.v14.i2.202457 more...

This work aims to investigate the influence of the combination of rice husk (RH) and recycled polypropylene (RPP) in producing environmentally friendly materials. In the current investigation, four distinct compounds were selected to identify the most effective combination for achieving the highest result of mechanical properties outcomes. Samples were created with variable RH concentrations (10%, 20%, 30%, and 40% by weight). The results showed that RH-RPP with 20% of RH had the highest mechanical properties. Scanning electron microscopy (SEM) images prove the enhanced mechanical characteristics. In addition, the water absorption and thickness swelling analysis show that RH-RPP composites with 20% RH concentration produce competitive results of 1.14% and 2.06%, respectively. Therefore, the finding from the present study summarized that the combination of RH and RPP with 20% of RH percentage had a great potential in producing competitive eco-friendly material for engineering applications. In addition, it is anticipated that it will be able to create RH-RPP composites as a potential alternative for conventional polymers in various applications, thereby contributing to sustainable development goals especially in line with the SDG 12, responsible consumption and production. more...

Low-carbon steel is often used for welding joints, whether in the form of structural steel or other materials; the application of this material is used in shipbuilding, bridge construction, and other fields. Welding inspection is needed to determine the quality of the weld. Visual inspection and non-destructive testing (NDT) are techniques in welding inspection. This study aims to determine the results of visual inspection and non-destructive testing (NDT) on welding joints of low-carbon steel produced by GMAW. The welding joints used are V-butt joints with a bevel angle of 300, 10 mm thick plate, 2.6 mm root gap, variations in welding layers: 3 layers (root pass, filler pass, and capping), and 4 layers (root pass, 2 filler passes, and capping), filler metal ER 70S-6 0.8 mm, and CO2. Volts, current, travel distance, and shielding gas flow rate are welding parameters. The tests carried out were visual inspection referring to limits for imperfections in ISO 6520-1, non-destructive tests (NDT) that were carried out, namely penetrant tests and radiography tests. The visual inspection and non-destructive testing (NDT) on specimen 1 reveal an internal defect, specifically a lack of fusion; the specimen should be rejected. Specimen 2 shows an imperfection in the surface area, namely in the form of spatter (2 spots), and there are internal imperfections in the form of porosities with an area of less than 3%. The specimen should be accepted. more...

A ring frame is a machine used for yarn production in the textile industry. Continuous use of the machine results in wear on the shaft timing pulley on the ring frame machine. To improve this condition, repairs are needed, one of which uses the hardfacing method. This study aims to determine the effect of hardfacing on the microstructure and hardness of the shaft timing pulley made from AISI 1045. The hardfacing process used the shielded metal arc welding (SMAW) method with welding current variations of 115 A, 125 A, 135 A, 145 A, and 155 A. In this study, the electrode used was AWS A5.1 E7018 with a diameter of 3.2 mm. The hardfacing product obtained was then finished with a lathe to produce a shaft with a final diameter of 30 mm. In this study, microstructure and hardness tests were carried out on specimens before and after finishing. The results of this study showed that an increase in current caused an increase in the number of pearlite phases in the weld metal and HAZ (heat-affected zone) areas. While in the base metal, the increase in current increased the number of ferrite phases. The highest hardness value was found in specimens that were hardfaced with a current of 145 A. However, the hardness of the hardfacing layer will decrease with the use of currents greater than 145 A. The hardness of the specimens with hardfacing treatment at a current of 145 A resulted in hardness in the weld metal, HAZ, and base metal of 225 HV, 209 HV, and 203 HV, respectively. After the finishing process, the weld metal, HAZ, and base metal in this specimen produced a hardness of 225 HV, 217 HV, and 208 HV, respectively. more...

Utilization of agriculture biomass waste into high value product is still potential to develop. In this study, cellulose nanofibers (CNF) as valuable materials were isolated from rice straw. Sodium hydroxide pulping and hydrogen peroxide bleaching were conducted as cellulose pretreatment. The CNF was prepared using 1 M hydrochloric acid hydrolysis followed gamma irradiation with various radiation doses, i.e. 40, 60, 80, 100 and 120 kGy. Compositions of ?–cellulose and water retention of each stage processes increased inversely with hemicellulose, lignin and degrees of polymerization which had been strengthened by Fourier transform infrared spectroscopy (FTIR) spectra. X-ray Diffraction (XRD) analysis revealed that crystallinity index was more intense than rice straw, i.e. 80.85 %. Particle Size Analyzer (PSA) studies described the isolation process of CNF succeed with the smallest size 77.8 nm. The CNF functional groups of hydrophilic both hydroxyl and carboxylate slightly diminished with increasing of radiation doses followed water retention reducing, however the crystallinity had not changed significantly. Increasing radiation doses also could improve the thermal stability with the highest Tg 153.1 0C therefore the obtained CNF could be used as suitable nanocomposite. more...

Crucibles are essential tools used in many industries, and their production can be resource-intensive and costly. This study aims to determine the potential of evaporation boat waste produced by the plastic metallization industry with molasses as a binder in crucible production. This study explores the effects of various concentrations of molasses on the mechanical and physical properties of crucibles made from evaporation boat waste. The evaporation boat waste used in this study was crushed and filtered with a 100-mesh sieve. Molasses were added during the mixing process with concentrations of 0 wt.%, 5 wt.%, 10 wt.%, 15 wt.%, and 20 wt.%. The mixing process was done for 120 minutes, followed by compaction with a pressure of 25 MPa. The green body formed is dried at 100?C for 300 minutes. In this study, firing was done at 1150?C temperature with 240 minutes of holding time. The specimens in this study were characterized using XRD, SEM, density, hardness, and 3-point bending tests. The results showed that the resulting crucible only had BN and TiB2 crystalline phases. Using molasses as a binder showed that crucible specimens did not form a new crystalline phase. Increasing the molasses content from 0 wt.% to 5 wt.% led to an increase in the physical and mechanical properties of the crucible specimens. However, the mechanical and physical properties of the crucible specimens decreased with the use of molasses that exceeded 5 wt.%. The best mechanical and physical properties of crucible specimens were produced using 5 wt.% molasses. This composition has a weight percentage of BN and TiB2 of 68.9% and 31.1%, with density, hardness, and flexural strength of 2.36 g/cm3, 64 HRA, and 31.5 MPa. more...

This study aims to determine the accuracy of the equating method that uses a circle equation approach in terms of its circular arc (Simplified Circle Arc). This research uses 2015 National Examination data from two questions packages. Using the number of preliminary samples as many as 2135 on the X and 2271 test devices on the Y test. After doing a Rasch analysis using a Mean Square Outfit (MNSQ), the data was acquired and analyzed. Following this, replication was performed up to a maximum of 50 times for each kind of data distribution. For each replication, up to a maximum of 50 respondents were selected from the original data set to be used as data for score equalization. The Root Mean Square Error (RMSE) statistic is then used to analyze the outcomes of the equating score. The results showed that the average RMSE group that has the same distribution will provide a lower RMSE value compared to groups that have different data distributions. The low average RMSE value indicates the accuracy of the equal of the scores performed. Thus, the use of the SCA method is highly recommended to equalize scores, especially in small samples in classes at school to prevent discrimination in grading. more...

The world of writing scientific papers cannot be separated from students' routines. As part of an educated society, the writing process is a means for students to increase their insight, sensitivity, and soft skills before entering the world of work. However, not all students think that writing scientific papers, especially articles, is an easy job. Meanwhile, recently, there have been a lot of software and web applications that can help students compose articles easily, one of which is Publish or Perish. It is hoped that the socialization activity regarding the use of Publish or Perish can increase the enthusiasm and attraction of students to be more active in writing scientific papers. The workshop was carried out in two steps, starting with introducing the software and applying search results to several types of articles, namely bibliometric analysis and systematic literature review. This activity succeeded in motivating participants to write articles and enter them into a competition. more...

This work investigates the physicochemical characteristics of grease-trap wastewater discharged from a large community market. It proposes potential mechanisms of fat, oil, and grease (FOG) solid formation, separation, and accumulation inside grease traps. Sixty-four samples, i.e., the floated scum, suspended solid-liquid wastewater, and settled sludge, were collected from the grease-trap inlet and outlet chambers. A lower pH of 5-6 at 25-29 °C inside the grease trap than those reported under the sewer conditions (pH 6-7) was revealed. A significant difference in solid and dissolved constituents was also discovered between the inlet and outlet chambers, indicating that the baffle wall could affect the separation mechanism. The sludge samples had 1.5 times higher total solids (TS) than the scum samples, i.e., 0.225 vs. 0.149 g g−1 TS, revealing that the sludge amount impacted more significantly the grease trap capacity and operation and maintenance. In contrast, the scum samples had 1.4 times higher volatile solids (VS) than the sludge samples, i.e., 0.134 vs. 0.096 g g−1 VS, matching with the 64.2 vs. 29.7% of carbon content from CHN analysis. About 2/3 of the free fatty acids (FFAs) with palmitic acids were the primary saturated FFAs, while the remaining 1/3 of unsaturated FFAs were found in the solid and liquid samples. Although up to 0.511 g g−1 FOG can be extracted from the scum samples, none from the sludge samples. More diverse minerals/metals other than Na, Cl, and Ca were found in the sludge samples than in the scum samples. Grease-trap FOG solids and open drain samples exhibited similar physicochemical properties to those reported in the literature. Four potential mechanisms (crystallization, emulsification, saponification, and baffling) were presented. This work offers insights into the physicochemical properties of grease-trap wastewater that can help explore its FOG solid formation, separation, and accumulation mechanisms inside a grease trap. more...

Homogeneous charge compression ignition (HCCI) is an advanced combustion strategy proposed to provide higher efficiency and lower emissions than conventional compression ignition. Nevertheless, the operation of HCCI engines still presents formidable challenges. Preparing homogeneous mixtures and controlling the combustion phase are crucial challenges in the context of engine performance. Piston bowl geometry significantly enhances the process by improving the flow and facilitating air-fuel mixing for combustion. On that note, this study utilised the CFD simulation methods to analyse HCCI combustion in port fuel injection (PFI) mode and evaluate the effect of piston bowl geometries on engine performance. For this purpose, the CFD simulation result for a single-cylinder, four-stroke YANMAR diesel engine was validated with experimental data. The different piston bowl geometries with the same volume, compression, and equivalence ratio were then investigated numerically. The validation result of the CFD simulation offers enough confidence to continue the study with different piston bowl geometries. The results attained from the Direct Injection (DI) engine piston bowl application demonstrate a minor change in in-cylinder pressure and heat release rate. The piston bowl design employed in a Port Fuel Injection engine application exhibited different combustion phases while demonstrating similarity in attaining in-cylinder pressure. The findings for swirl induce piston bowl design indicate an enhancement of in-cylinder pressure for the Spiral Crown geometry model, reaching 9.42 MPa. The results of the study demonstrated that the piston bowl's design affected the performance of an HCCI engine. more...

To curb the spread of the coronavirus, almost all countries implemented nationwide school closures. Suddenly, students experienced a serious disruption to their school and social lives. In this article, we argue that psychological research offers crucial insights for guiding policy about school closures during crises. To this end, we review the existing literature on the impact of school closures during the COVID-19 pandemic on children’s learning and mental health. We find that the unprecedented scale and length of school closures resulted in a substantial deficit in children’s learning and a deterioration in children’s mental health. We then provide policy recommendations on how to ensure children’s learning and psychosocial development in the future. Specifically, we recommend that more attention should be paid to students from marginalized groups who are most in need of intervention, evidence-informed and personality-tailored mental-health and social- and emotional-learning programs should be implemented in schools, and generational labels should be avoided. more...

Background: Over the past decade, private investments in health care including hospital have grown significantly, more than doubling. As the number of hospitals in Indonesia increases, a competitive business environment develops. Identifying hospital market structure can help various stakeholders to optimize the hospital's performance. Aims: This study analyzed the market structure and concentration of the hospital industry in Indonesia. Methods: This study used hospital characteristics data from Ministry of Health of Indonesia that retrieved in October 2020. Market concentration is determined by the number of industry players operating in a market, the distribution of services, and the types of services offered. The hospital market concentration was identified by measuring the Concentration Ratio (CR) and the Herfindahl–Hirschman index (HHI). Results: The results showed that the market share of hospitals in Indonesia was still dominated by government hospitals, which represent 51.4% of the market share. The concentration ratio of four companies (CR4) remains <40, indicating that competition remains relatively open among private hospitals at the national level. Conclusion: Several cities have established hospital markets that are characterized by robust competition, whereas in other cities, the hospital industry remains oligopolistic or monopolistic. It is important to note, however, that this does not imply that the market structure is ineffective on account of competition; rather, it is the result of a scarcity of hospitals in a number of Indonesian cities. Keywords: Concentration ratio, Economic competition, Herfindahl–Hirschman Index, Hospital market more...

Penelitian ini bertujuan untuk mengetahui profil, lembaga yang terlibat dan peran pasar ternak di pasar ternak Sungai Sariak Kabupaten Padang Pariaman. Penelitian ini telah dilaksanakan pada bulan Mei sampai Juni 2023. Metode yang digunakan adalah studi kasus dengan observasi langsung ke lokasi penelitian. Teknik pengambilan data didapatkan melalui wawancara. Hasil penelitian menunjukkan bahwa profil pasar ternak dilihat dari sarana dan prasarana yang dimiliki, tergolong tipe pasar ternak kategori C. Sarana dan prasarana Pasar ternak Sungai Sariak Kabupaten Padang Pariaman tidak tersedianya tempat penampungan ternak, klinik konsultasi, sarana telekomunikasi, ruang rapat (meeting room), peralatan kantor pasar ternak yang belum lengkap serta perlu perbaikan pasar ternak tersebut dari pemerintah daerah. Lembaga yang terlibat di pasar ternak yaitu Lembaga formal dan Lembaga informal. Lembaga formal terdiri dari Dinas Peternakan Kabupaten Padang Pariaman, Kepala UPT pasar ternak Sungai Sariak Kabupaten Padang Pariaman dan Pemerintahan Kabupaten Padang Pariaman. Lembaga informal terdiri dari peternak, pedagang pengumpul dan pedagang besar. Hal ini memiliki peran dalam fungsi pemasaran yaitu 1) Fungsi transaksi dalam hal a) Pembelian sapi potong, b) Penjualan sapi potong, 2) Fungsi fisik dalam hal a) menerima, b) fasilitas, c) Pengangkutan, d) distribusi. 3) Fungsi pelancar yaitu dalam informasi pasar ternak. Peran pasar ternak Sungai Sariak adalah : a) sebagai fungsi transaksi merupakan target pasar yang tepat sampai mendapatakan harga yang sesuai dengan kondisi ternak, b) peran pasar ternak sebagai fungsi fisik dan fungsi pelancar terdapat Sarana dan Prasarana di pasar ternak serta informasi harga ternak sebagai kelancaran jual-beli ternak. Kata Kunci : Peran Pasar Ternak, Lembaga yang terlibat, Sungai Sariak more...