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This service aims to socialize the mathematical connection to the concept of Element (demand and supply for MSME products in North Pelawi Village, Babalan District, Langkat Regency. This service activity is carried out by a service team consisting of lecturers and students who aim to provide briefings in the form of socialization to the community of business actors and MSME owners where with this activity it is hoped that there will be awareness and motivation of business actors to relieve the importance of applying mathematical concepts in the context of the connection or tension between the amount of demand and supply. So to predict the amount of demand and the amount of supply at a certain price is not difficult. Because with the ability to predict and control the number of goods offered, the price will be able to be conditioned to be stable and still within reasonable limits. For this reason, the role of business actors has a great influence on the sustainability and development of the business carried out so that the goal of obtaining maximum profits for better MSME performance is obtained. This service was carried out in North Pelawi Village by previously recording business actors around North Pelawi Village with the aim that MSMEs that have been run so far can better apply an understanding of mathematical concepts that are connected to the demand and supply elements for products produced in a certain period or period of time.

Building fires can significantly degrade the strength and integrity of steel structures, so post-incident evaluation is crucial to ensure building safety and feasibility. This study aims to evaluate the condition of the steel tower structure after the fire through a visual inspection method. A total of 35 structural elements were examined, including columns, beams, and bracing, to identify damage caused by heat exposure. The inspection results showed that 6 elements (17%) were in the category of Acceptable, 8 elements (23%) Needs Attention, 5 elements (14%) Not Acceptable, and 1 element (3%) Not Applicable because they had been removed. Steel columns generally remain upright without deformation, but suffer damage to the protective layer (coating). In contrast, most blocks lose their protective layers, are directly exposed to fire, show early signs of corrosion, and some suffer severe damage such as flange tears and cuts. These findings confirm the importance of systematic documentation and classification of element conditions as the basis for technical decision-making for structural improvement. Visual inspection proved effective as an initial step in the evaluation process, providing a relevant initial picture of the extent of damage and the need for intervention. This study recommends follow-up in the form of advanced structural analysis and material testing to ensure the feasibility of reusing the affected steel elements.

Sustainable water resource management is a crucial issue, especially in horticultural agricultural areas such as Berastagi, Karo Regency, North Sumatra. This area is known for its abundant water resources, but the challenge in optimizing water distribution and quality is still a problem. This study aims to analyze the level of community participation in water resource management in Berastagi and to develop a sustainable management strategy using the SWOT approach. The method used in this study is a SWOT analysis that considers strengths, weaknesses, opportunities, and threats in water management. The results show that community participation in technical aspects is quite high, but still low in terms of planning and evaluation. The main strength factors are abundant water resources and support from the farming community, while weaknesses lie in limited infrastructure and water pollution from agricultural activities. The main opportunities for sustainable water management include irrigation modernization and increased government regulation, while the main threats are the impacts of climate change and the use of chemicals in agriculture that have the potential to pollute water. From this SWOT analysis, it is recommended to develop technology-based irrigation infrastructure, increase socialization and community education to increase involvement in water management, and collaboration between the government, community, and research institutions. It is expected that this strategy can strengthen sustainable and adaptive water resource management in the Berastagi horticultural area.

The influence of global development in the field of technology has caused some younger generations to forget local cultural activities such as behavior, language, and traditional games, which ultimately may lead to a loss of love for the nation and the country. Universitas Pembangunan Nasional Veteran Jakarta is an educational institution with the slogan "Campus for the Defense of the Nation," making it highly appropriate to have efforts to introduce and preserve culture within the campus community. One of these efforts is to introduce the traditional game of engklek on campus. This research involves community service activities focused on creating engklek game facilities on campus so that students can recognize and practice it

This research aims to develop a web-based information system at the Kebondowo village office. This research was conducted by analyzing the extent to which the Kebondowo Village Office uses an effective information system. This system development uses PHP, HTML and MySQL programming languages with the waterfall model method with several stages, namely requirements analysis, design, development, testing, and maintenance. The results of the study can be concluded that the Kebondowo Village Information System that can support activities in Kebondowo Village to the community. The Kebondowo Village website has been designed and implemented to improve the quality of public services by presenting information about profiles, announcements, and village activity agendas. This initiative makes it easier for Kebondowo Village Officials to deliver information directly without intermediaries, as well as providing convenience for residents to access and receive accurate information, including about social assistance programs and other activity agendas in the village.

This research aims to evaluate user interface/user experience issues and measure the usability level of batiksiputri.com. Batik Warna Alam siPutri is a micro, small, and medium enterprise (MSME) that has a website-based e-commerce, namely batiksiputri.com. This research was made using a qualitative descriptive method based on Jacob Nielsen's usability theory in determining what criteria have been applied and which have not been applied from the usability level at batiksiputri.com. The usability criteria used are Jacob Nielsen's usability criteria, namely learnability, efficiency, memorability, errors and satisfaction. The application of Jacob Nielsen usability in the evaluation of user interface design/user experience on batiksiputri.com resulted in the conclusion that the usability criteria applied in batiksiputri.com have implemented the criteria of learnability, efficiency and satisfaction well but have a few shortcomings in the criteria of memorability and error. This batiksiputri.com, requires further development in order to meet all user needs.

Wood is a superior choice as the main material for forming the structure of a construction system. Its unique characteristics and the fact that it can withstand gravity and lateral forces make it the first choice as a material for construction models. Landa', which functions as a rice storage house, has a unique construction system with the use of natural materials. The research was conducted by exploring how the construction system of landa' is formed from materials and materials using qualitative methods with a descriptive way of presentation. The results of the study concluded that the construction system of landa' uses a unique method by placing each part above the other to form a single unit of the landa' building, the column (pessajo) is bound by the beam (tolohna) and the addition of beams (parende) which will support the body of the landa', the body part is composed of walls (rinding) and fastened with a locking system tallu boko' and sa'pi’ which will support the roof (dea).

The purpose of this research is to build a web-based information system for the Bandungan Sub-district Religious Affairs Office (KUA) that covers marriage registration, referral applications and receipt of marriage registration and referral reports. The research method used is the Research and Development (R&D) method. The R&D method is a research method used to produce certain products and test the effectiveness of these methods. In addition, this research uses the proven waterfall theory. The result of this research is to produce a web-based information system that is able to manage integrated marriage and referral registration data using R&D and Waterfall methods. This information system uses the PHP programming language and uses mysql data storage.

The spread of hoaxes through voice manipulation technology, such as voice changers, has become a significant issue in Indonesia in recent years. This technology allows perpetrators to manipulate someone's voice, which is then used to spread false information that can damage an individual's reputation, influence public opinion, and create social unrest. This study aims to analyze the legal aspects related to the misuse of voice changers in the spread of hoaxes, identify the challenges faced in law enforcement, and provide policy recommendations to improve legal protection for hoax victims. The methodology used in this research is normative legal research, with a normative approach focusing on the analysis of the Electronic Information and Transactions Law (UU ITE) and the Personal Data Protection Law (UU PDP), as well as other relevant regulations. The results show that although Indonesia has a sufficient legal framework to address hoax cases involving voice changers, law enforcement still faces challenges in terms of identifying perpetrators, proving voice manipulation, and the lack of more specific regulations. Additionally, victims have the right to legal protection, including compensation and clarification of false information. This study recommends enhancing the capacity of law enforcement, strengthening regulations, and improving digital literacy among the public to address the challenges posed by this technology.

This study explores the discourse surrounding the Agus Salim donation controversy, focusing on how media narratives and legal rhetoric shape public perception. Drawing on two primary sources—articles from Brilio.net and KapanLagi.com—the research employs critical discourse analysis to examine the framing of key events, including allegations of donation mismanagement, legal strategies, and the public's reaction to the case. The findings reveal how media outlets construct competing narratives, emphasizing the roles of public figures, lawyers, and victims in influencing the discourse. By analyzing language use, power dynamics, and ideological positioning, this study highlights the interplay between legal rhetoric and public opinion in cases of social and moral significance. The research contributes to understanding how controversies are framed in digital media and their implications for justice and accountability in contemporary society.

Pakistan is a developing country. Its transportation infrastructure mainly consists of road network. About 95% passengers and fright is transported using the road network. This high demand on road network is because of the unreliable railway system between the cities. Due to such high demand on road network the accident involvement risk of an individual is much high as compared to developed countries. This study uses a new modeling approach to estimate road safety risk for WTP.  A correlated random parameters Tobit model (heterogeneity-in-mean) is integrated with machine learning (Decision tree).  The decision tree categorizes higher-order interactions, while the model captures unobserved correlations and heterogeneity. The framework examines WTP determinants using a representative sample of 3178 road users from Pakistan. The model estimates WTP for different (fatal and severe injury) risk reductions to monetize road traffic crash costs. Results show maximum respondents are willing to support safety improvement policies. The model reveals significant WTP heterogeneity linked to perceptions of road safety and accident risk. Systematic preference heterogeneity emerges through higher-order interactions, offering insights into WTP relationships. Marginal effects highlight varying sensitivities to explanatory variables, quantifying their impact on WTP probability and magnitude. The framework provides two key contributions. It identifies public WTP determinants, emphasizing heterogeneous effects. It also helps in prioritization safety policies by understanding public sensitivity to WTP. The insights further emphasizing on the importance of road safety interventions to the specific socio-economic profiles of road users. This study offers a significant contribution to road safety improvement by providing valuable recommendations for policy makers. By integrating detailed socio-economic factors, it also addresses the urgent need for targeted traffic safety interventions in Pakistan. These findings are expected to aid policymakers and stakeholders in developing effective strategies to enhance road safety and reduce the accident involvement risk effectively.

This study aims to analyze the implementation of Metaverse technology as a medium for socializing religious moderation at the Palembang Religious Education and Training Center. Using a qualitative approach, this research explores how Metaverse can facilitate the dissemination of religious moderation values and its potential in improving the understanding of balanced, tolerant, and inclusive religious practices among participants. Data was collected through interviews, observations, and document analysis. The research findings show that Metaverse offers a dynamic and immersive platform to deliver training and discussions on religious moderation, allowing participants to interact more deeply with the material presented. However, challenges such as limited access to technology and understanding of the virtual environment were also found. This research highlights the need for further adaptation and support to maximize the effectiveness of this technology in building religious moderation.

Indonesia is an archipelagic country that has abundant mineral wealth, both metal minerals and other minerals. Metal minerals, including gold, tend to have a higher economic value. Based on data from the Ministry of Energy and Mineral Resources, the world's gold reserves in 2020 were 50,300 tons of Au. Indonesia is among the 5 largest in the world with 5% of the total gold reserves, which is 2,600 tons of Au. Therefore, it is necessary to develop technology and science in the mining industry, especially gold and silver, to improve the optimization of the process and increase the added value of the mining products themselves. One of the gold extraction processes can be done hydrometallurgically with the cyanidation method using a intensive leach test. The results of this experiment show that factors such as cyanide usage and ultra fine particle size will greatly affect the recovery of gold and silver metals.

Gold (Au) as a precious metal has played significant role throughout human history. Most gold ores subjected to leaching using the sodium cyanide (NaCN) contain high levels of base metals. High base metal content can influence the recovery of pregnant leach solution (PLS), as it affects the consumption of sodium cyanide (NaCN) and lime used to optimize the gold ore leaching process. Pre treatment leaching process is required for gold ores before the leaching process is carried out. In this study, a pre treatment leaching process was carried out using the Aachen High Shear and Filblast Low Shear Reactors with variations in feed solids percentage for each reactor, utilizing NaCN concentrations of 1000 ppm for the Aachen with bottle roll test (BRT) and 500 ppm for the Filblast with agitations leach test (ALT). Based on this study, each pre-treatment leaching reactor, the extraction percentages were 54.30% Au, 63,40%  Ag for the Aachen and 52.19% Au and 68,10% Ag at Filblast. Lime consumption in the Aachen was highest at 3.47 kg/t (PreOx 3 and AAL), while in Filblast at 1.71 kg/t. Meanwhile, NaCN consumption in the Aachen was highest at 0.64 kg/t (PreOx 2), compared to 0.80 kg/t in Filblast.

This study aims to analyze the maintenance strategy of railway lines in West Sumatra using the Life Cycle Cost (LCC) approach to determine the most economically efficient and sustainable maintenance option. The main issues raised are the high cost of reactive maintenance and the risk of operational disruption due to track damage. The research method involved collecting construction, operational, and maintenance cost data from railway operators, as well as LCC-based scenario simulations to compare preventive and reactive maintenance strategies. The results of the analysis show that the preventive maintenance strategy results in lower total life cycle costs, compared to the reactive strategy. In addition, the preventive strategy also supports operational sustainability by minimizing the risk of service disruption and improving user safety. SWOT analysis shows that LCC implementation has great potential to improve budget efficiency and support local economic growth, although challenges such as data limitations and natural disaster risks need to be mitigated. This research concludes that an LCC-based approach can be the basis for designing more effective, efficient and sustainable railway maintenance policies. Recommendations include prioritizing preventive maintenance, using monitoring technology, and strengthening supporting policies.

This study aims to reprocess middlings from the mineral processing process carried out at PT Timah Tbk which still contains cassiterite minerals using a three disc magnetic separator tool with variations in electric current strength and distance between the height of the magnet and the belt. Sn content will be analyzed using XRF. Variations in the strength of the electric current used are ranging from 0.3 A to 1.3 A which will be divided into 3 variations and variations in the height distance of the magnet with the belt used, namely 0.7, 1 and 1.3 cm. This research was carried out 9 times of testing which will be sought for the optimum level and recovery produced. The results showed the distribution of tin distribution in each size fraction. In addition, the Sn content and Sn recovery produced also varied for each test variation. The highest Sn content (%), 27.1%, was obtained in the test with the highest electric current strength variation and the smallest magnet height distance. Meanwhile, the highest recovery of 85.12% was obtained in the test with the smallest electric current strength and the largest magnetic height distance. Based on the results of the study, the higher the electric current strength used, the higher the Sn content obtained, but the lower the Sn recovery obtained. Meanwhile, the higher the height distance of the magnet with the belt used, the lower the Sn content obtained but the higher the Sn recovery obtained. As well as for the optimum levels and recovery obtained in research using strong electric current and the height distance of the magnet with a medium belt with Sn content of 12.2% and Sn recovery of 54.67%.

The digital era in the industrial revolution 4.0 has brought significant changes in various aspects of life, including education. With the presence of increasingly sophisticated digital technology and the widespread use of Artificial Intelligence (AI), the education system is currently faced with new challenges to adapt to the times. However, the emergence of AI also has a negative impact on education, especially in the context of Technology and Vocational Education, namely increasing plagiarism, excessive dependence, lack of skill development, and weakening of culture, norms, and interactions between students and lecturers. This study aims to analyze the moral and ethical role in the use of AI in Technology and Vocational Education. The literature review research method is used in this study with a qualitative approach. Secondary data collection was carried out with the help of Google Scholar web technology and the bibliometric processing application VOSViewer. The data analysis technique applies the Miles & Hubberman model which consists of: data collection, data reduction, data presentation, and conclusion drawn. The results of the study show that morals and ethics play a central role in the utilization of artificial intelligence (AI) in Technology and Vocational Education in the digital era of the Industrial Revolution 4.0. The study also recommends strategic steps to ensure the use of AI in Technology and Vocational Education remains ethical and effective.

Bio-inspired engineering is a rapidly growing field that applies principles found in nature to develop innovative solutions in structural engineering, materials science, and robotics. This paper explores biomimicry in various disciplines, such as self-cleaning surfaces inspired by lotus leaves, energy-efficient building designs modeled after termite mounds, and ultra-lightweight yet durable materials inspired by spider silk. The study highlights the role of computational modeling in replicating biological structures and discusses the challenges of translating natural efficiencies into engineered systems. Additionally, this research examines the environmental impact of bio-inspired materials and their potential to replace conventional, resource-intensive materials in industries such as construction, aerospace, and biomedical engineering.

Natural disasters such as earthquakes, hurricanes, and floods pose significant risks to critical infrastructure. AI-driven disaster response systems provide real-time analytics, predictive modeling, and automated response strategies to mitigate damage and improve recovery efforts. This paper explores how AI-powered drones, satellite imagery, and sensor networks enhance disaster monitoring and decision-making. Additionally, the study discusses the role of AI in optimizing emergency resource allocation and predicting infrastructure vulnerabilities. Through an analysis of past disaster management strategies, this research aims to propose AI-integrated frameworks that enhance disaster preparedness and resilience.

Hypertension and diabetes mellitus, which many elderly suffer from, are a significant problem in Indonesia because they pose a risk of serious complications and even death. At the Olak Kemang Community Health Center, the incidence of hypertension and diabetes mellitus in the elderly has increased. However, the scope of elderly people's active participation in various hypertension and diabetes mellitus management programs is still low. Based on the results of the team's research and initial observations, it is known that the main cause of this problem is a lack of family support and limited knowledge about the efforts that families must make in managing illnesses in the elderly. This situation indicates weak family functioning which has an impact on health. This community service activity aims to strengthen family functions and self-care behavior for elderly people with hypertension and diabetes mellitus in the work area of the Olak Kemang Community Health Center through the implementation of Posdaya (Family Empowerment Post). Posdaya activities include counseling about family functions, developing family skills to manage hypertension and diabetes mellitus in the elderly, as well as assisting families to be able to access various application-based health services for the elderly and families. The activity was attended by 20 elderly people and their families. The results of the activity showed that 80% of participants experienced increased knowledge. In addition, participants provided statements of attitude to improve family function and implement self-care behavior for elderly people with hypertension and diabetes mellitus.