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Waste management remains one of the major challenges in urban areas, including Rungkut Menanggal Subdistrict, Surabaya. Although two active waste banks already exist, community participation and the optimization of social and material assets remain limited. This community empowerment program aims to optimize local potential through the strengthening of social and material assets based on waste bank activities using the Asset-Based Community Development (ABCD) approach. This approach emphasizes the utilization of existing community strengths and resources to create sustainable social transformation. The program was carried out through five participatory stages: discover, dream, design, define, and destiny. The results show a significant improvement in the community’s capacity for household waste management. Residents were able to process approximately 100 kg of organic waste into compost and create creative products such as decorative bags made from plastic waste. Moreover, collaboration among local institutions such as Karang Taruna Arkidli, PKK, Posga Venus, Posga Bumi, and KSH increased, strengthening collective action in environmental management. This program demonstrates that the ABCD approach effectively enhances social capital, increases community participation, and generates both economic and environmental benefits. Waste bank management based on local asset empowerment can serve as a model for inclusive and adaptive community development in urban environmental contexts.

Café retrorika is one of the cafes located in Batu City, Malang, which adopts a green marketing concept with a unique aesthetic touch, combining the concepts of “Retro” and “Eco-friendly”, where almost all of the café’s furniture and decorations are made from recycled materials, such as old windows, used motorcycle tanks, gas cylinders and rims, which are transformed into high-art decorative elements. Awareness of the importance of sustainable business is growing, including in the culinary sector. Cafes and restaurants now compete not only in terms of taste and service but also in their commitment to environmentally friendly concepts. Moreover, today’s consumers are increasingly selective in choosing places to eat that support local products, use environmentally friendly materials, and strive to reduce plastic waste. This is one of the reasons for building cafes with different concepts, as done by the owner and founder of Retrorika café. This study uses a qualitative approach with a case study research type. Data collection techniques include participant observation, interviews and documentation. The result show that Retrorika café was built based on the personal idealism of its owner as a green movement activist, rather than market calculations. The café’s “Retro” identity serves as physical evidence of sustainability practice through the use of used furniture while also creating a nostalgic experience. Its marketing strategy focuses on education through the Re-dukaci program, Retrorika goes to Halokes and Sa-Si-Su as an effort to prove the authenticity of green practices and mitigate greenwashing. These results can be concluded that the founder’s passion shapes the Green Corporate Identity and becomes a source of sustainable competitive advantage that is difficult to imitate.

Fasting as a spiritual and health practice has been practiced for thousands of years in various religious and cultural traditions around the world. In the last decade, researchers have shown increasing interest in the health aspects of fasting, not only from a physiological but also a psychological perspective. This phenomenon is interesting to study further, especially in the context of modern society which often faces stress, anxiety, and various mental disorders. The approach used in this study was a qualitative approach with a literature study method that analyzed in depth various reference sources related to the mental impact of fasting. The results of the review of several studies show that fasting has been proven to have an effect on mental health because it has a significant impact on overall mood improvements, with reduced anxiety levels and increased feelings of calm. Furthermore, another important aspect of mental health is cognitive function, which includes attention, concentration, memory, and executive function. It was found that cognitive alertness is generally maintained during short- to medium-term fasting, but begins to decline after longer fasting durations. Fasting also has an impact on extraordinary psychological resilience and good mental health despite advanced age. Researchers attribute this extraordinary mental resilience to the consistent practice of long-term fasting, which may have induced significant neuroplastic and psychological adaptations.

Indonesia is one of the countries with abundant availability of palm fiber composite, yet its application in advanced material technology remains limited. On the other hand, most motorcycle helmets available in the market are made from ABS plastic, which has limitations in impact energy absorption and may increase the risk of head injuries during accidents. This study aims to develop helmet composites based on palm fiber and epoxy resin by varying the fiber volume fractions (15%, 25%, and 35%) and alkali soaking durations (75, 150, 225, and 300 minutes). The impact strength test results showed that the combination of 35% fiber volume and 225-minute alkali soaking produced the highest specific impact energy (SIP) of 0.142 J/mm². As a comparison, SNI-compliant helmets made from ABS plastic only reached an EPS value of 0.00972 J/mm², indicating that palm fiber-based composite helmets could improve impact energy absorption efficiency by more than 14 times. The results conclude that increasing the fiber volume fraction and optimizing the alkali treatment duration significantly enhances the impact resistance, making ijuk-based composite helmets a promising alternative for safer and more eco-friendly protective gear.

Many used ABS plastic wastes have problems in their management. The aim of this research is to obtain a prediction of the fatigue life of a mixture of ABS plastic and used ABS as an injection molding product. The research method is carried out through the stages of mixing used ABS with a volume of 10%, 20%, and 30% in ABS grade A and grade B; making fatigue test specimen molds according to R. R. Moore standards, injection molding of a mixture of used ABS and ABS grade A and grade B, checking the straightness and smoothness of the specimen surface, fatigue testing with increasing serial loads, analysis and making a graph of bending stress (S) against fatigue life (N) (S-N Curve). The results of the study showed that the addition of used ABS had an effect on the fatigue life of both grade A and grade B of ABS, where the fatigue life of grade A of ABS increased with the addition of the volume percentage from 0% -30% of used ABS with the highest value at the addition of 30%, namely 43698.9 cycles, while in grade B of ABS, the fatigue life decreased with the increase in volume from 0% -30% with the highest fatigue life in grade B of ABS plastic without a mixture or 0%, namely 41377.5 cycles, the implication of which is that the addition of 0% -30% of used ABS in grade A can increase the fatigue life, but grade B of ABS actually decreases its fatigue life.

The demand for lightweight materials with high mechanical strength has driven the development of aluminum alloys, particularly Al-Mg-Si, through deformation processes such as cold rolling. This study aims to analyze the effect of varying degrees of cold rolling deformation on the grain aspect ratio and macrohardness of homogenized Al-Mg-Si alloys. Deformation was applied at three thickness reduction levels—5%, 10%, and 20%—followed by microstructural characterization using optical microscopy and macrohardness testing in accordance with ASTM E-18 standards. The results show that increasing deformation levels lead to elongated grain morphology, with the grain aspect ratio rising from 1.16 to 2.07 and macrohardness increasing from 46.64 HRE to 62 HRE. The emergence of slip lines and grain flattening indicates the occurrence of intense plastic deformation, while work hardening results from dislocation accumulation that impedes further slip motion. These findings confirm a strong correlation between microstructural evolution and mechanical property enhancement in cold-deformed Al-Mg-Si alloys. This research contributes to the optimization of cold rolling parameters to produce engineering materials with a desirable balance of strength, formability, and fatigue resistance for applications in the mining and heavy manufacturing industries.

This study aims to investigate the impact of packaging type and storage temperature on the physical, chemical, and sensory properties of chili blocks during storage. Additionally, the study aims to identify the optimal packaging and storage temperature combination, as well as to characterize the quality attributes of chili blocks. The experimental design employed was a Completely Randomized Design (CRD) in a factorial arrangement with two factors: packaging type and storage temperature. In this study, using aluminum foil as primary packaging, PP plastic packaging, and paper as secondary packaging, and 3 treatment storage temperatures, each repeated as many as 3 trials, so that it has 18 experimental units. Data analysis using ANOVA with Duncan's Multiple Range Test (DMRT)at a significant level of 5% using the SPSS18 program. The results showed that secondary packaging types and storage temperatures did not significantly affect physical properties (moisture content) and organoleptic properties (color, aroma, texture), but significantly affected the chemical properties (pH, vitamin C, ash content) and secondary packaging types the good for chili block is alufo + plastic packaging and refrigerator storage temperature (10oC), and good chili block characteristics are: Refrigerator storage (temperature 10oC) with alufo + plastic packaging: lowest physical properties (moisture content) 27.29, chemical properties (lowest pH 5.23, Vitamin C 12.91 and ash content 6.35).

This study comprehensively examines the concept of Sharia law by highlighting the main divisions within Islamic law: taklifi law and wadh'I law. Taklifi law encompasses five normative categories: obligation, recommendation, permissibility, makruh, and prohibition, which serve to regulate individual behavior in accordance with Sharia principles. Meanwhile, wadh'iy law emphasizes the causes, conditions, and requirements for the validity of a legal act, thus forming a normative framework that guarantees the validity of an action from an Islamic legal perspective. This study uses a normative approach through a literature review of primary sources of Islamic law, such as the Qur'an, Hadith, and classical and contemporary fiqh literature. The results of the study indicate that the division between taklifi and wadh'iy law is crucial for understanding the structure and complexity of Sharia law, both in terms of the vertical relationship between humans and God and the horizontal relationships between individuals. This study also examines the contemporary issue of plastic surgery from an Islamic legal perspective.  Plastic surgery is permissible for medical purposes, such as reconstruction following an accident, congenital defect, or impaired bodily function, as it aligns with the principles of preserving benefit and eliminating harm. However, plastic surgery solely for aesthetic purposes is considered forbidden, as it constitutes altering God's creation without a sharia (Islamic) justification. This finding confirms that the division of sharia law is not merely theoretical but also relevant in addressing modern issues, including in medical practice, and has important implications for the development of contemporary Islamic law and its application within the national legal context.

Clean water is a fundamental necessity; however, many regions still struggle to access it due to contamination by suspended particles, organic matter, and harmful microorganisms. This activity aims to strengthen the practical competence of Biology Education students at Universitas Negeri Medan through training in making simple water filters. The training was conducted through demonstrations and simulations using turbid water from the Tembung River as a sample. The filter was constructed from readily available materials such as used plastic bottles, cotton, tissue, sand, small gravel, and palm fiber arranged in layers. The results showed that the filter effectively reduced water turbidity and enhanced students’ skills in clean water treatment technology. The training also encouraged students to develop 21st-century skills such as critical thinking, problem-solving, and collaboration, while preparing them as future educators capable of raising community awareness about the importance of maintaining water quality. Therefore, this training has the potential to be developed as an applicative environmental education model that contributes positively to clean water provision.

This study aims to design a blanking die used for mass-producing mobile phone holders while prioritizing efficiency and dimensional accuracy. The die set developed includes key components such as the punch, die, stripper, guide post, and fastening bolts. The product produced has dimensions of 138 × 63 × 2 mm and uses ST 37 steel as the raw material. Based on calculations, the required blanking force is 129,000 kN, which is considered safe for the production process. The design also accounts for an optimal clearance of 0.083 mm and a die thickness of 35 mm to effectively withstand the working load. Simulations using stress analysis methods reveal that the von Mises stress distribution on both the punch and die remains below the elastic limit of SKD11 material. The maximum stress on the punch is recorded at 2.437 × 10⁵ N/m², while on the die it reaches 5.153 × 10⁵ N/m², both well below the yield strength of SKD11, which is 2.918 × 10⁸ N/m², indicating that these components operate safely without the risk of plastic deformation. To strengthen the construction, the stripper is designed with a thickness of 12 mm, and the addition of four SCM435 bolts is recommended to improve system stability. This die design is verified through manual calculations and Finite Element Analysis (FEA) to ensure its reliability. Overall, the findings of this study demonstrate that the designed blanking die can support mass production with high precision, optimal structural strength, and long-term durability.

The use of plastic as planting containers remains a serious environmental issue due to its non-biodegradable nature, which can contaminate soil and water. One solution is to utilize rice straw waste as a raw material for biodegradable pots. This innovation can reduce dependence on plastic pots while providing ecological and economic benefits. Rice straw-based pots offer several advantages, including easy decomposition in soil, enhancing soil fertility, and reducing pollution caused by straw burning. This study aims to utilize rice straw waste to produce environmentally friendly biodegradable pots as an alternative to plastic containers. The method employed is Participatory Action Research (PAR), emphasizing collaboration between students and teachers through hands-on learning. The activities include socialization, practical training on making rice straw pots, participatory evaluation, and the use of the pots as planting media. The results showed that 100% of participants successfully produced high-quality rice straw pots, with positive responses reflected in high satisfaction and increased understanding of recycling concepts. The rice straw pots decompose within 2–3 months, add organic matter to the soil, and create opportunities for a circular economy. The main challenge identified is the relatively short durability of the pots, requiring innovations using natural adhesives or material combinations to enhance resilience. These findings reinforce the potential of rice straw as a solution for agricultural waste management and community empowerment toward sustainable agriculture.

This Community Service Programme was implemented to address the issues faced by Bank Sampah Anggrek's partners in Bendogerit Village, Blitar City. The main problems faced by the partners included limited variety of recycled products, simple waste processing techniques, and ineffective marketing strategies. Activities include socialisation, strengthening local partnerships, recycling training, and digital marketing assistance. As a result, members of the Waste Bank were able to create three new products: plant pots made from orange peels, carnival costumes made from fabric and plastic waste, and ecobrick furniture, and establish collaborations with two local businesses. The constraints of the Community Service Programme activities included limited production facilities, inconsistent participant attendance, low digital literacy, and competition with traditional waste collectors. This programme demonstrates that a waste bank-based sociopreneurship model can have economic, social, and environmental impacts while supporting sustainable waste management strategies. The programme was also successful due to its participatory approach, which actively involved Anggrek Waste Bank members in every step. Participants not only gained new information, but also acquired practical skills that can be used in the processing and marketing of recycled goods. This community service programme greatly helps to raise awareness of the importance of community-based circular economy. While reducing negative impacts on the environment, the sociopreneurship model can boost the community's economy. Bank Sampah Anggrek has the potential to develop into a centre for sustainable waste management innovation at the neighbourhood level by strengthening local capacity and opening up opportunities for cross-sector collaboration.

Semarang City has experienced significant growth over the past five years (2020 – 2025). Rapid urban development has been positively correlated with increasing environmental burdens, particularly in solid waste generation. In Indonesia, the largest portion of municipal waste consists of food waste, followed by plastic waste. Among these, plastic waste is the most difficult to manage. It is estimated that around 70% of Indonesian households still burn their waste as a means of disposal. The burning of waste, especially plastics, releases toxic emissions such as dioxins, furans, and fine particulates, which pose serious health risks, particularly to the respiratory system. This practice not only worsens air quality but also threatens public health. This community service program focused on providing education about the thermal properties of waste and the negative impacts of plastic burning on both the environment and human health. The program aimed to improve public knowledge of the thermal characteristics of various types of waste and the hazards of plastic burning through accessible scientific outreach. The initiative is expected to raise awareness and understanding of environmentally friendly waste management alternatives such as waste separation, composting, and recycling. The activity was conducted in RW 01, Tugurejo Village, Tugu District, Semarang City.

Plastic waste remains a pressing issue in Bakung Village, Teluk Betung Barat Subdistrict, Bandar Lampung City, as it affects public health, reduces environmental aesthetics, and triggers flooding due to poor waste management systems. In response, the 2025 Integrated Community Service Program (KKN) of UIN Raden Intan Lampung, through Group 98, applied the ecobrick method as a community-based alternative for managing plastic waste. This study adopted an appropriate technology approach with descriptive qualitative methods, namely observation, interviews, and documentation, to analyze field conditions and evaluate program outcomes. The results demonstrated the successful construction of a ±1-meter monument spelling “Bakung,” which incorporated more than 350 used plastic bottles as ecobricks. Beyond beautifying the environment and serving as a landmark, the monument inspired local residents to participate actively in sorting waste and making ecobricks. Community involvement was particularly visible during material collection and production stages, reflecting the effectiveness of a participatory approach. Additionally, this activity had an educational impact by showing that plastic waste can be transformed into useful and aesthetically valuable products. Although limited time and energy became major challenges, these were addressed through continuous mentoring. Overall, the program proved that ecobricks offer a practical and innovative solution for reducing plastic waste and contribute to achieving Sustainable Development Goals (SDGs) 11 and 12.

Waste remains one of the major environmental issues and a serious challenge in rural communities. The lack of discipline in waste disposal and limited knowledge of the impact of non-biodegradable waste have contributed to declining environmental quality and potential health problems. In Buniwangi Village, Pagelaran Subdistrict, Cianjur Regency, these conditions highlight the need for educational programs that provide practical understanding while fostering community awareness. This community service activity aimed to improve residents’ awareness of waste management through visual education media in the form of information boards displaying the decomposition time of various types of waste, ranging from organic to non-organic materials. The implementation method applied an asset-based community development (ABCD) approach, emphasizing active community participation. The program was carried out in three main stages: preparation, implementation, and evaluation. The preparation stage included location surveys, needs mapping, and obtaining permission from village authorities. The implementation stage involved designing attractive educational boards, installing them at strategic points in the village, and conducting socialization to explain the information provided. The evaluation stage was carried out through direct observation and short interviews to assess the program’s impact on community knowledge and behavior.The results indicated an improvement in residents’ understanding of the differences between biodegradable and non-biodegradable waste. Villagers began to show awareness of reducing single-use plastics and started applying the 3R principles (reduce, reuse, recycle) in daily life. Overall, this program had a positive impact by fostering greater environmental concern and became an initial step toward building a sustainable waste management culture in Buniwangi Village.

Ineffective management of household waste in rural areas, such as Aek Korsik Village, Aek Ledong District, Asahan Regency, causes air pollution due to traditional waste burning practices. This research aims to design and implement an environmentally friendly low-smoke waste incinerator as an alternative solution based on simple technology and local resources. The research methods used are technological engineering approaches and field studies, including tool design, trials, and environmental and social impact evaluation. The furnace is designed using heat-resistant local materials and mild steel, features a dual ventilation system and a smoke exhaust system with a simple filter, and has a combustion capacity of 5 kilograms per cycle. Preliminary studies show that the composition of waste is dominated by organic matter (60%), plastic and paper (30%), as well as the rest are inorganic. Testing over several weeks showed that an average burn time of 1.5 hours was able to reduce smoke emissions by up to 60% compared to conventional methods. The air quality around the test site has improved significantly, and the community has responded positively to the ease of use and environmental benefits of the furnace. This study concludes that low-smoke combustion furnaces are effective as environmentally friendly waste management solutions in villages, with recommendations for increasing combustion capacity and integrating other waste management methods to support sustainability and environmental preservation.

Tourism is one of the most important economic sectors in the world, contributing significantly to state revenue and improving people's welfare. The tourism industry has grown rapidly in recent decades, with the number of international tourists continuing to increase. The general objective of this study is to develop a deeper knowledge and understanding of the impact of uncontrolled tourism on the sacredness of Bali's nature and culture, as well as strategies for developing sustainable tourism in Bali. The type of research used by the author in examining the problems in this study is normative juridical research. The conclusion of this study is a legal review of the protection of natural and cultural heritage in Bali Province is regulated in several laws and regulations such as Law No. 5 of 1990 concerning the Conservation of Biological Natural Resources and Ecosystems. In addition, cultural protection in Bali has also been regulated in several laws and regulations such as Law No. 11 of 2010 concerning Cultural Heritage. This legal review will also discuss the implementation of laws and regulations related to the protection of natural and cultural heritage in Bali. The Bali provincial government's policy on the protection of natural and cultural heritage, namely the policy on the protection of natural heritage is regulated in the Governor's Regulation or Pergub No. These include Law No. 97 of 2018 concerning the Limitation of Single-Use Plastic Waste, Governor Regulation No. 45 of 2019 concerning Bali Clean Energy, Governor Regulation No. 48 of 2019 concerning the Use of Battery-Based Electric Motorized Vehicles, and Governor Regulation No. 8 of 2019 concerning Organic Farming Systems. Cultural heritage protection policies are regulated by Law No. 10 of 2010 concerning Tourism, Regional Regulation No. 2 of 2023 concerning the Bali Provincial Spatial Plan (RTRWP), the Designation of Cultural Heritage Areas in Bali, such as Ulun Danu Batur Temple and Lake Batur, the Subak Cultural Landscape and Temples in the Pakerisan Watershed, and others.

The problem of plastic waste in Gandan Hamlet, Pogalan Village, is becoming an increasingly urgent environmental issue that requires sustainable management. Unmanaged waste can pollute the soil, air, and water, and threaten public health. In response to this situation, Tidar University Community Service (KKN) students implemented an innovative community-based waste management program. The main focus of this program is to utilize plastic waste into products with utility and sales value, namely plastic-filled pillows and Eco-Paving Blocks. This activity was carried out through a participatory approach by actively involving the community at every stage, from outreach and education to technical training on the collection, sorting, and processing of plastic waste. The education provided concerns the dangers of plastic waste to the environment and the importance of recycling as an alternative solution. Making pillows from plastic filling was chosen because the process is simple, inexpensive, and can be done by housewives. Meanwhile, Eco-Paving Blocks are the result of utilizing mixed plastic waste as an environmentally friendly and durable building material. This program has succeeded in reducing the volume of plastic waste in the surrounding environment, while raising public awareness of the importance of environmental conservation. Furthermore, this activity opens up new economic opportunities for the community by creating creative products from waste. Evaluation results show that the community-based waste management model is effective in fostering community independence in waste processing, creating a cleaner environment, and encouraging a culture of sustainable living at the village level. The success of this program is expected to serve as an example for replication in other areas with similar challenges. Continued support from the village government and cross-sector collaboration are key to this initiative's continued growth and long-term impact.

This study investigates the potential of Low-Density Polyethylene (LDPE) plastic waste as a partial substitute for sand in concrete block mixtures, focusing on its effects on compressive strength and water absorption. LDPE is a non-biodegradable plastic waste that poses significant environmental challenges. Its incorporation into construction materials offers a promising solution to reduce pollution while enhancing the performance of building components. The research employed LDPE substitution levels of 10%, 15%, 20%, 25%, and 30% by weight of sand, compared against conventional concrete blocks without LDPE. Experimental results revealed that the highest compressive strength was achieved with a 15% LDPE mixture, reaching 80.762 kg/cm² at 28 days of curing—an increase of approximately 40.8% compared to normal blocks, which recorded 57.359 kg/cm². LDPE additions up to 20% maintained favorable strength characteristics, while higher proportions (25% and 30%) led to a decline in mechanical performance. In terms of water absorption, the inclusion of LDPE demonstrated a decreasing trend, attributed to the hydrophobic nature of plastic, which enhances moisture resistance in the concrete blocks. These findings suggest that a 15% LDPE substitution represents an optimal formulation for producing eco-friendly concrete blocks with improved strength and reduced water absorption. The study highlights the dual benefits of waste management and material innovation, aligning with sustainable development goals. By repurposing plastic waste into construction applications, this approach not only mitigates environmental impact but also contributes to the advancement of green building technologies. Further research is recommended to explore long-term durability, thermal properties, and scalability of LDPE-based concrete products in real-world construction settings.

Environmental issues are complex and increasingly important. This is also true in the industrial sector, particularly in the culinary industry. Currently, public awareness of environmental issues is increasing, leading consumers to consider eco-friendly factors in their daily lives. The concept of eco-friendliness in the coffee shop industry has become an increasingly popular trend. Especially in the food and beverage (F&B) industry, which plays a significant role in waste production, particularly plastic and food waste. Therefore, the concept of eco-friendly practices has emerged in the F&B industry. This can take the form of using environmentally friendly food ingredients, eco-friendly packaging, and the café concept itself, which conveys an eco-friendly image that can increase consumer purchasing interest. This is implemented by Fore Cafe and Coffee Galaxy Bekasi. This study aims to investigate how the eco-friendly concept is implemented and its impact on consumer purchasing interest at Fore Cafe & Coffee Galaxy Bekasi. The study employs a quantitative approach with a sample and population of 99 consumers of Fore Cafe & Coffee Galaxy Bekasi, selected randomly. The analysis uses validity tests, reliability tests, normality tests, and T-statistical test. The results of the research and data processing using SPSS version 25 showed that the Eco-Friendly concept had an effect on increasing consumer interest in purchasing Fore Cafe & Coffee Galaxy Bekasi, and certainly had a positive effect on environmental conditions.