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The advancement of Industry 4.0 demands production systems to operate more efficiently, adaptively, and securely in facing global challenges. One promising technology that addresses these needs is the Digital Twin (DT), a digital representation of physical systems that enables integration between the real and virtual environments. Through DT, production processes can be modeled, monitored, and tested in real time, allowing for evaluation and optimization before implementation in actual systems. This study aims to explore the effectiveness of DT in modeling automated industrial systems, particularly in relation to improving production efficiency, quality control, energy savings, and operational safety. The research employed an experimental approach based on simulation within a robotic production line consisting of machines, sensors, actuators, and conveyors. The research stages included identifying system components and workflows, developing a DT model that integrates physical and virtual layers with Internet of Things–based data connectivity, and conducting simulations representing diverse operational scenarios. The findings indicate that DT implementation enhances operational efficiency, reduces production errors, and optimizes energy utilization. Furthermore, DT proves effective in strengthening safety aspects by enabling early detection of potential disruptions and providing preventive recommendations before significant impacts occur. Compared to conventional simulations, DT offers a more realistic, adaptive, and relevant approach to the needs of modern industry. The implications of this study highlight DT’s strong potential to become a new standard in the development and control of automation-based production systems, driving the creation of smarter, more efficient, and sustainable industries.

Bananas are easily damaged so their durability is very limited. By processing bananas into sangcok it is quite profitable, so that it is used as a side business by the community as an additional income. This study aims to (1) analyze the characteristics of entrepreneurs and business profiles of sangcok (2) availability of raw materials, production technology, use of inputs, costs, income, efficiency and added value of the sangcok agro-industry. The raw material for making sangcok is kepok bananas. Entrepreneurs obtain raw materials for bananas by buying them directly at the market. The results of this study are the marketing plan implemented by the sangcok business, namely in terms of products, always maintain good product quality and the materials used are also halal, the prices applied are also affordable according to what was ordered, a less strategic place does not discourage culinary lovers from continuing to buy sangcok, and promotion strategies are carried out through online and offline media, promoting more through online media, although in doing promotions, honesty is emphasized and not badmouthing other businesses. The conclusion from this study is that the marketing plan carried out in the sangcok business is in accordance with an Islamic perspective. Related marketing plans such as product, price, promotion and place are also based on the Koran, hadith and the practice of the Prophet Muhammad in conducting marketing.    

The application of responsibility accounting has a very important role, with the aim of evaluating work results and generating feedback so that future cooperative operations can be better. Accountability accounting can help assess financial performance so that the proper use and use of financial resources can be identified. With performance appraisal it can be known the condition of the cooperative in evaluating the results of activities so that it can be used to measure success in KUD Tani Wilis. This study aims to determine the application of profit center responsibility accounting in assessing financial performance. In this study the data used are primary data in the form of an overview, vision and mission, as well as cooperative organizational structure, and secondary data in the form of profit center accountability reports. Sources of data collection in the form of interviews and documentation with quantitative descriptive analysis techniques. The results of this study indicate that the application of responsibility accounting in KUD Tani Wilis is inadequate because it is not fully in accordance with the requirements of responsibility accounting. The results of financial performance in terms of profit center based on the analysis of Gross Profit Margin, Operating Profit Margin, and Net Profit Margin show unfavorable financial performance results. Cooperatives need to implement responsibility accounting in accordance with responsibility accounting requirements by separating controllable and uncontrollable costs, as well as providing account codes for these accounts in the accountability report so that it makes it easier for cooperative managers to control costs and see who is responsible if irregularities occur. Cooperatives must also pay more attention to the increase in cost of goods sold, and minimize production costs and operational costs as well as optimize sales/revenues and evaluate business costs or operational costs, so as to increase profits. By evaluating business costs or operational costs carried out by cooperatives in an effort to increase efficiency where economic resources can be used effectively so that costs are not wasted so that the profits obtained are more optimal and can improve the financial performance of cooperatives.  

 Performance appraisal is a way of determining the work results of employees and work groups that are useful if used the right methods on target and produce the desired conclusions according to output targets and performance standards. This research method is qualitative, namely observing performance appraisals that are already in effect with a combination of quantitative and qualitative methods. Quantitative by comparing work standards and output targets. Qualitative is assessed from skills (competence, physical abilities, coordination and teamwork); character (discipline, ability to make decisions and speed of response); and accuracy (supervision, control and the presence of work solutions).  Assessment data from January to April 2019. The time limit was chosen because the performance appraisal had stopped starting in August 2019, and required a remedial analysis. The results of the study show that performance appraisal provides an efficiency of 14% and makes assessments more noticed by all production employees. Methods collaborate in generating a more complete and mature assessment, as well as other suggestions for improvement. And prove that performance appraisal is useful for efficiency and effectiveness, controlling and monitoring performance, and being able to motivate employees to work even better.  

This research explores the role of nanotechnology in enhancing energy storage systems for renewable energy applications. The study aims to evaluate the potential of nanomaterials, including carbon nanotubes, graphene, and fullerenes, in improving the performance of energy storage devices, specifically batteries, by focusing on their ability to enhance energy conversion efficiency, storage capacity, and battery lifespan. A case study was conducted using a prototype battery incorporating these nanomaterials, connected to a photovoltaic system to simulate real-world energy production conditions. The methodology included testing key parameters, such as energy conversion efficiency, charging time, and battery degradation through multiple charge-discharge cycles. The findings showed a significant improvement in energy conversion efficiency, with the nanomaterial-based batteries outperforming conventional batteries by up to 20%. Additionally, the nanomaterial-based batteries demonstrated an increased storage capacity and longer cycle life, maintaining performance after hundreds of charge-discharge cycles. Nanomaterials contributed to these improvements by enhancing electrical conductivity, reducing internal resistance, and preventing degradation that typically occurs in conventional batteries during prolonged use. Furthermore, nanostructured coatings on the electrodes were found to improve light trapping and anti-reflection capabilities, which directly contributed to the higher efficiency of the battery. This research highlights the transformative potential of nanotechnology in energy storage systems, offering a promising solution to the intermittency challenges of renewable energy sources such as solar and wind. The study also suggests that further research is needed to explore other nanomaterials, scale up the technology for industrial applications, and integrate smart energy management systems to optimize energy storage in renewable energy systems.

Efforts to increase income, provide employment, contribute to the availability of animal protein and increase production activities are part of food security in the aquaculture sector. Based on data reported from the DGT KKP Statistics, (2021) aquaculture can increase production activities, where in 2020 the third quarter of fish farming production reached 11.5 million tons and increased to 12.25 million tons in 2021 in the third quarter.  Alternative techniques that can be done as an effort to increase fish farming production results are optimizing the use of biofloc system technology (Pramono et al., 2018; Faridah et al., 2019 and Permana et al., 2021). This biofloc system is a union of living organic substances into the form of blobs, where this biofloc is composed of the word bio which means life while floc means blob. For example, in tilapia farming, to increase production results so that they can ... Meeting market demand can implement a biofloc system. Tilapia is classified as a type of freshwater fish that is in great demand in the market. The advantages of implementing a biofloc system in tilapia farming are environmentally friendly so that it is easy to carry out advanced cultivation, there is efficiency in water utilization, short maintenance period, and maximizing stocking density. In addition to the advantages, there are also obstacles faced, fish farming with a biofloc system such as lack of understanding of fish farming with the biofloc method, directly providing feed without paying attention and lack of water quality control. Furthermore, the research conducted implemented the observational descriptive method.