Publication Search

The issue of plastic waste is increasingly becoming an environmental concern, including in elementary schools, due to its non-biodegradable nature and its potential to cause environmental pollution if not properly managed. This activity aims to implement the Ecobrick method as an innovative solution for managing and utilizing plastic waste at SDN 054945 Desa Dogang, Gebang District, Langkat Regency. The method used is a descriptive qualitative approach involving 65 students from grades IV and V through a community service activity. The activity was carried out on July 17, 2024, through preparation, implementation, and evaluation stages, with data collection techniques including observation, documentation, and reflective discussion. The results show that the application of the Ecobrick method successfully increased students' understanding and awareness of the dangers of plastic waste and fostered an early environmental concern. Moreover, previously worthless plastic waste was processed into functional Ecobrick benches that can be utilized within the school environment. This activity also encouraged a sense of mutual cooperation, responsibility, and creativity among the students. Thus, the Ecobrick method has proven to be an effective alternative for plastic waste management and a contextual learning medium in creating an environmentally friendly school culture.

Vibrio sp. is one of the main pathogenic bacteria causing various diseases in whiteleg shrimp (Litopenaeus vannamei) cultivation, such as vibriosis, which can reduce the survival rate and productivity of ponds. Environmentally friendly Vibrio control efforts can be achieved through the use of probiotics. One widely used probiotic is Lactobacillus sp., which is known to suppress the growth of pathogenic bacteria through competition for space and nutrients, production of antimicrobial compounds (bacteriocins and organic acids), and increased shrimp non-specific immunity. This study aimed to determine the effectiveness of administering different doses of Lactobacillus sp. in suppressing Vibrio sp. populations in whiteleg shrimp cultivation media. The method used was a Completely Randomized Design (CRD) with four treatments and five replications: control (A), 6 ppm lactobacillus sp (B), 12 ppm (C), and 18 ppm (D). The parameter observed was the Total Vibrio Count (TVC) in the culture water after 24 hours of lactobacillus administration.

Bungus waters, located in Padang City, are one of the important fisheries centers in western Indonesia with high diversity of demersal and pelagic fish species. Bottom longline is an environmentally friendly passive fishing gear widely used by fishers in these waters. This study aimed to determine the effect of different bait types used in bottom longline fishing gear on fish catch in Bungus waters. The method employed was experimental fishing using a Randomized Block Design (RBD), with three bait treatments, namely tuna, scad, and small squid, each replicated nine times. Catch data were analyzed using Analysis of Variance (ANOVA) followed by the Least Significant Difference (LSD) test. The results showed that differences in bait type had a highly significant effect on fish catch (F_calculated > F_table at the 1% level). Squid bait produced the highest catch with an average of 10.26 kg (41%), followed by scad at 8.1 kg (33%) and tuna at 6.52 kg (26%). The catch composition was dominated by grouper (44%), snapper (18%), threadfin bream (10%), and kurisi (9%). The use of squid bait was proven to be the most effective in increasing the productivity of bottom longline fishing gear in Bungus waters, Padang, West Sumatra.

UMKM Kerupuk Subur is one of the SMEs quite well-known for its cracker products and is located at Jl. Gedongkuning Gg. Nuri No.66, RT.2/RW.33, Wonocatur, Banguntapan, Bantul Regency, Special Region of Yogyakarta. Product packaging is one of the important factors in maintaining the quality of the crackers to keep them crispy and not easily soggy. Currently, UMKM Kerupuk Subur still uses ordinary plastic packaging that is only tied with a string, so its protection against physical damage and product quality deterioration is still limited. Besides functioning as a protector, product packaging also serves as a consumer attraction that can influence purchasing decisions. In 2024, UMKM Kerupuk Subur experienced a production and sales decline of 4.58 percent, which is suspected to be influenced by packaging factors. This study aims to develop Kerupuk Subur packaging based on customer criteria and needs. The Green Quality Function Deployment approach is used to obtain comprehensive information in designing packaging according to consumer needs and preferences. The results of identifying consumer needs show priorities such as packaging that is easy to open, resealable, transparent, environmentally friendly, durable, and tear-resistant. Based on these needs, packaging development alternatives were designed, including an easy-open system, durable and tear-resistant packaging, and resealable packaging to maintain product quality and crispness. Then, testing was conducted with 50 respondents to assess consumer satisfaction. The level of consumer satisfaction falls into the satisfied category, with an average score of 4.18, where 80% of respondents stated they were satisfied or very satisfied with the designed packaging prototype.

This community service activity was carried out in the Parbaba White Sand Beach tourist area, Samosir Regency, with the aim of improving environmental cleanliness while fostering student awareness of the importance of preserving tourist destinations. This program is the result of a collaboration between the internship students of the Samosir Regency Tourism Office and the students of the Real Work Lecture (KKN) of Gadjah Mada University. The method used is a participatory approach, where students are directly involved in beach cleaning and waste sorting activities. The team cleaned the beach area, collected garbage, and separated waste into two categories, namely organic and inorganic. The results of the activity showed an increase in beach cleanliness and an increase in student awareness of the importance of protecting the tourist environment. In addition, this activity strengthens cooperation, social responsibility, and collaboration skills between students. This service program is expected to be a model of sustainable environmental activities that can be applied in other tourist destinations, thereby supporting the development of environmentally friendly and sustainable tourism.

Cassava is one of the strategic agricultural commodities in Indonesia, contributing significantly to national production, particularly in several major producing provinces. In addition to the challenge of declining harvested areas, cassava processing activities also generate agricultural waste that poses environmental risks. In Purwasari Village, Dramaga Subdistrict, Bogor Regency, household-scale cassava processing industries produce solid waste in the form of cassava peels, which are not optimally managed and are commonly discarded in the surrounding environment. This cassava waste has the potential to cause environmental pollution, unpleasant odours, and negative impacts on public health. One sustainable alternative for managing this cassava waste is the use of cassava peels as a raw material for composting. This study aimed to identify problems associated with cassava peel waste and to assess members of the Taruna Tani Millennial Farmer Group's interest in compost production using cassava peels. The research was conducted from December 2024 to June 2025 using a community-based assistance approach. Data was collected through interviews and questionnaires involving 20 respondents. The results showed that the main problems associated with cassava peel waste include waste accumulation, limited processing facilities, and low community awareness. Farmers’ interest in cassava peel composting was generally categorized as high, with an average score of 77%, although several indicators remained at a moderate level. Extension activities and hands-on demonstrations were proven to enhance farmers’ understanding, interest, and participation. With sustained educational support and adequate facilities, the use of cassava peel compost has strong potential to promote environmentally friendly, sustainable agricultural waste management.

This study investigates the effect of adding onion peel extract as a corrosion inhibitor on the corrosion rate and hardness of radiator pipes. The research employed an experimental method with inhibitor concentrations of 0 ppm, 100 ppm, 200 ppm, and 300 ppm. Corrosion rate testing was conducted using electrochemical methods, while hardness was measured using the Vickers method. The findings reveal that the addition of onion peel extract at a concentration of 300 ppm significantly reduced the corrosion rate to 0.081 mmpy, achieving an inhibition efficiency of 56.45%. Furthermore, the same concentration enhanced the surface hardness of radiator pipes to 255.403 Kgf/mm². These results demonstrate that onion peel extract has strong potential as an eco-friendly organic corrosion inhibitor. Its dual function in reducing corrosion and improving mechanical properties highlights its applicability in radiator pipe protection and sustainable engineering practices. The study contributes to the development of natural inhibitors as alternatives to synthetic chemicals, aligning with environmental preservation efforts and advancing green technology in material protection.

The increasing demand for housing in tropical regions requires building materials that are fast to apply, environmentally friendly, and resilient to extreme climate conditions as well as disaster risks. Conventional interlocking bricks are often chosen for their ease of construction, yet they still face challenges such as moisture and early cracking. This study proposes the innovation of the Hybrid Living Green Brick, a combination of lightweight bricks made from rice husk ash and fly ash waste (FRCB) with a biological layer of cyanobacteria. FRCB improves compressive strength by approximately 30% with the addition of 5% rice husk ash, achieving 65 kg/cm², thereby meeting Class 50 requirements (≥50 kg/cm²) according to SNI-15-2094-2000. The incorporation of 3% cyanobacteria provides an additional though not significant strength improvement, while still within the Class 50 category. It also reduces brick weight by 4.3%, with further optimization potential through cyanobacteria integration, and lowers carbon emissions from the firing process. Cyanobacteria induce the formation of CaCO₃ layers that seal pores, reduce water absorption by an average of 10%, and provide self-healing properties for microcracks. Preliminary observations indicate that FRCB offers stable mechanical performance, while biological activity was observed on the 7th day with the formation of pale-white mineral layers continuing until the 28th day. This hybrid innovation shows potential to support sustainable and disaster-resilient tropical construction by combining the mechanical strength of waste-based materials with the biological durability of cyanobacteria against extreme climates. Despite challenges related to moisture control and production standardization, the Hybrid Living Green Brick concept opens new pathways for developing environmentally friendly construction materials that are more adaptive to disaster-prone tropical conditions.

The development of automation and robotics technology has driven innovation in various industrial fields, particularly in automatic sorting systems. Manual sorting processes often lead to inefficiencies and human errors, creating the need for an automatic, fast, and accurate system. This research employs a qualitative method which includes experimentation, testing, and system documentation. The system is designed as a robotic arm for sorting objects based on color, utilizing a TCS3200 color sensor and an ESP32 microcontroller. An ultrasonic sensor detects the presence of objects, while the sorting results are displayed through a real-time web monitoring system. The test results show that the prototype successfully sorts four primary colors (red, green, blue, and yellow) with a high level of accuracy. This research is expected to serve as a reference for the development of automation systems and robotics learning tools in both educational and industrial applications. In addition, this research also contributes to the development of technology that can increase efficiency and accuracy in industrial production processes and provide more environmentally friendly solutions by reducing the need for manual labor.

Population growth and changing consumption patterns have led to a continuous increase in waste generation, with household organic waste being the dominant component in Bantul Regency. Low levels of public knowledge and awareness regarding waste management are also contributing factors. One environmentally friendly alternative for organic waste management is the use of Black Soldier Fly (BSF) larvae, which have high bioconversion capabilities. This community service activity aims to increase the knowledge of housewives in managing household organic waste using BSF maggots. The activity was carried out in RT 01, Mojosari Hamlet, Baturetno Village, Banguntapan District, Bantul Regency, involving 20 participants. The implementation method included a site survey, material delivery, an introduction to the life cycle and benefits of BSF maggots, an explanation of waste sorting, maggot feeding, and post-activity observations. However, limitations in maggot maintenance techniques persisted, requiring ongoing mentoring. This activity contributes to reducing waste generation at its source and supports sustainable household waste management based on community participation.

Population growth and changing consumption patterns have led to a continuous increase in waste generation, with household organic waste being the dominant component in Bantul Regency. Low levels of public knowledge and awareness regarding waste management are also contributing factors. One environmentally friendly alternative for organic waste management is the use of Black Soldier Fly (BSF) larvae, which have high bioconversion capabilities. This community service activity aims to increase the knowledge of housewives in managing household organic waste using BSF maggots. The activity was carried out in RT 01, Mojosari Hamlet, Baturetno Village, Banguntapan District, Bantul Regency, involving 20 participants. The implementation method included a site survey, material delivery, an introduction to the life cycle and benefits of BSF maggots, an explanation of waste sorting, maggot feeding, and post-activity observations. However, limitations in maggot maintenance techniques persisted, requiring ongoing mentoring. This activity contributes to reducing waste generation at its source and supports sustainable household waste management based on community participation.

The Low reading interest among elementary school students remains a problem encountered in various rural areas, including at SD Negeri 30 OKU in Batumarta 1 Village, Lubuk Raja District, Ogan Komering Ulu Regency. The limited availability of attractive and easily accessible literacy resources is one of the contributing factors to low student reading habits. This Community Service (PKM) activity aims to increase student reading interest by providing comfortable, educational, and child-friendly reading corners. The implementation method includes initial observation, providing and arranging reading corners, providing age-appropriate reading books, and mentoring and socializing the use of reading corners to students and teachers. The provision of reading corners is carried out through community service activities by university teams or volunteers, by providing bookshelves, various types of story books, children's encyclopedias, and interactive reading materials. To demonstrate the benefits of reading corners, comfort zone arrangements, regular reading schedules, and various literacy games are implemented to increase student engagement. The results of the activity show an increase in student interest in reading activities, as seen from the increased frequency of student visits to the reading corners and active participation in independent reading activities. In addition, teachers also feel the benefits of reading corners as a supporting tool for the learning process. Thus, providing a reading corner can be a simple but effective solution in fostering a culture of literacy and increasing the reading interest of elementary school students in the school environment.

This study investigates biomass-derived surface engineering of AISI 1020 steel for electromedical applications using galam wood charcoal and chicken bone waste as carburizing media. Surface modification is required to improve the mechanical performance of low-carbon steel, particularly in applications that demand high wear resistance and long-term durability. A pack carburizing approach was applied using various ratios of biomass-derived media at a treatment temperature of 800 °C for 2 hours. Chemical composition was analyzed using Optical Emission Spectroscopy (OES), surface hardness was evaluated using Micro Vickers hardness testing, and microstructural characteristics were observed using optical microscopy. The results show a significant increase in surface carbon content with increasing fractions of chicken bone powder, indicating its effectiveness as a carbon donor and diffusion promoter. The surface hardness increased from approximately 150 HV in the untreated condition to a maximum of about 860 HV in the treated specimen. Microstructural observations revealed the formation of a distinct carburized layer with increasing thickness and uniformity, consistent with enhanced carbon diffusion and surface strengthening. These findings demonstrate that biomass-derived surface engineering provides an effective and sustainable approach for improving the surface properties of low-carbon steel. The proposed method offers strong potential for environmentally friendly manufacturing of durable and reliable electromedical components.

This research is motivated by the high rate of inability to read the Quran in Indonesia and the urgency of providing appropriate learning stimuli during the golden period of child development. The Al-Husna method was chosen because it emphasizes the principles of simplicity, ease, and tartil, which are considered relevant to the characteristics of early childhood. This study aims to assess the effectiveness of the application of the Al-Husna method in Quran learning at PAUD Tahfidzul Qur'an Yurefi Kendari using the Goal-Oriented Evaluation Model. The research method used is descriptive qualitative, with data collection techniques including observation, interviews, and documentation studies. The evaluation results show that the application of the Al-Husna method has met the learning objectives that have been set at PAUD Tahfidzul Qur'an Yurefi. These achievements include improving students' abilities in recognizing and pronouncing hijaiyah letters with the support of visual codes, mastery of syllables of hijaiyah letters, and understanding the punctuation system using standards according to Rasm Uthmani, achieving efficiency in the use of time and materials in the learning process, and creating a fun, active, and participatory learning environment for children. The identified challenges primarily relate to the need for educators to have a comprehensive understanding of the Al-Husna method. However, schools can address these challenges by implementing ongoing training and mentoring programs. Overall, the findings of this study indicate that the Al-Husna method is effective in building a foundation of basic Quranic reading skills and understanding in early childhood, using a child-friendly and meaningful approach. Therefore, this method can be used as a strategic alternative for teaching Quranic reading and understanding in educational institutions.

The main problem in Longko Village is the low utilization of coconut husk waste due to limited community knowledge and processing skills, resulting in the waste being discarded or burned without economic value. This Community Service Program aimed to empower the community through innovative processing of coconut husk into environmentally friendly and marketable broom products. The program employed a participatory approach consisting of observation, socialization, technical training, mentoring, and evaluation, involving six participants from farming households and housewives. Evaluation was conducted by assessing participants’ skills and the quality of the products produced. The results showed a significant improvement in participants’ technical competencies, as indicated by an increase in knowledge from 30% to 90% and practical skills from 25% to 80%. Most participants were able to independently produce at least one coconut husk broom with acceptable functional quality. Furthermore, the program enhanced participants’ understanding of the economic potential of coconut husk and created opportunities for sustainable household-based enterprises utilizing local resources.

The construction and infrastructure sectors are shifting toward lighter, low-emission, and sustainable materials in response to the high carbon footprint and excessive weight of common materials such as concrete and steel. One promising alternative widely developed is natural fiber–based composites. However, studies comparing mechanical properties of variations of natural fibers within a single framework remain limited. This study aims to evaluate and compare composite mechanical properties reinforced by sisal fiber, bamboo fiber, and pineapple leaf fiber to determine the optimal fiber type for sustainable infrastructure applications. The research methodology involved fabrication of composite specimens using a unidirectional fiber configuration with a resin matrix, molded following ASTM D638 Type I dimensional and geometrical requirements. Tensile testing was conducted to evaluate mechanical responses, including ultimate tensile behavior, deformation characteristics, and elastic properties, which were presented in tabular and graphical forms. The results show that incorporation of all natural fiber types significantly enhanced composite mechanical properties, exhibiting an average tensile strength of approximately 26 MPa. Pineapple leaf fiber demonstrated balanced mechanical behavior combining strength and ductility, while sisal fiber showed superior tensile resistance and rigidity. Bamboo fiber provided moderate mechanical improvement. Overall, natural fiber–reinforced composites demonstrate strong potential as environmentally friendly alternative materials for infrastructure applications, with mechanical characteristics adjustable based on reinforcing fiber type.

The growing pressure on urban drainage systems caused by blockages and environmental pollution highlights the importance of developing sustainable filtration materials. This study explores the use of coffee waste as an environmentally friendly filler integrated into polyester fabric (PE 24S) to create a green filtration medium for drainage applications. The research focuses on developing and characterizing the composite material through macro-photographic morphology analysis, tensile strength testing, and antibacterial evaluation. The findings demonstrate that polyester fabric modified with coffee waste shows a tensile strength of 54.024 ± 5.498 MPa, elongation of 111.128 ± 6.915%, and a Young’s modulus of 0.486 ± 0.543 MPa, indicating improved flexibility and sufficient mechanical durability for drainage system use. Additionally, antibacterial testing reveals that the composite material can inhibit microbial growth due to the presence of natural bioactive compounds found in coffee waste. Overall, the results suggest that coffee waste–enhanced polyester fabric offers a sustainable and mechanically reliable alternative for environmentally friendly drainage infrastructure while supporting circular economy practices.

This study examines the stigma and patterns of social support in adolescents with unplanned pregnancies in Makassar in the context of the Bugis-Makassar culture that upholds the values of siri' (honor and shame). Teen pregnancy is understood as an experience influenced by the confluence of traditional values, religious morality, and modern social demands. This study used an Interpretative Phenomenological Analysis (IPA) approach on 17 adolescent girls aged 15–19 years who experienced unplanned pregnancies in June–November 2023. Data were obtained through in-depth semi-structured interviews, recorded, verbatim transcribed, and analyzed using a six-stage science process with a focus on the experience of stigma and social support. Two main themes emerged: Living Under the Shadow of Siri': Multidimensional Stigma and Navigating Social Support in the Context of Shame. Participants experienced widespread stigma in a variety of contexts, including family (serial violations and family shame), society (moral judgments and gossip), health services (discrimination of health workers), and educational environments (bullying and exclusion). Stigma is also internalized in the form of guilt and negative identity, and is especially severe in adolescents with economic limitations. Efforts to seek support are often hampered by concerns about stigma, so adolescents engage in selective disclosure and rely more on peers. Grandma is often the most accepting source of family support. These findings underscore the need for multilevel interventions that reduce community stigma, strengthen friendly and confidential health services, and develop culturally sensitive peer support networks.

Wood consumption in Indonesia, which is expected to reach more than 64.84 million m³ by 2025, is putting enormous pressure on forests, as evidenced by the reduction in forest area through the clearing of 96,230 hectares of forest in 2023. To reduce dependence on wood as a building material, alternative materials with comparable physical and mechanical properties are needed. Bamboo, especially laminated bamboo, was chosen because it has high tensile strength, a short harvest time, and abundant availability. This study examines the behavior of hollow section laminated bamboo beam-column connections with a glue-in-rod-bracket system to determine the ductility of the connection under unidirectional (static) loads. An experimental method was used with the independent variables of diameter and number of bolts, while the dependent variables included the moment-rotation of the connection, stiffness, strength, and ductility. The results show that the average ductility values for 4 and 6 thread rods D6, D8, and D10 mostly meet the SNI 1729 (≥1.25) and AISC 360 (rotation >0.03 rad) standards, with classifications ranging from "partially ductile" to "fully elastic." However, the 10-diameter 6-thread rod only achieved a ductility of 1.2, thus failing to meet the SNI standard. Based on the Handbook of Structural Steel Connection Design and Details, all connections fall into the non-seismic category because their ductility values are less than 3. These findings confirm the potential of laminated bamboo as an environmentally friendly construction material, while also providing technical guidelines for the design of non-seismic beam-column connections.

Used cooking oil is a household waste that is often disposed of carelessly, potentially polluting the environment and endangering health. In Battu Winagun Village, the availability of used cooking oil from household activities and the abundant potential of lemongrass plants have not been optimally utilized. This community service activity aims to increase the community's knowledge and skills in processing used cooking oil and lemongrass plants into environmentally friendly products with economic value, namely natural aromatherapy candles. The implementation method includes socialization of the negative impacts of used cooking oil on the environment, training in the process of filtering and processing used cooking oil, extracting lemongrass aroma, and assistance in making and packaging aromatherapy candles. The results of the activity showed that the Battu Winagun Village community was able to understand the importance of managing used cooking oil waste and utilizing lemongrass plants as a natural additive. This activity has an impact on reducing environmental pollution and opening up creative business opportunities based on the village's local potential. Thus, the use of used cooking oil and lemongrass plants can be a sustainable solution in waste management while improving the economy of the Battu Winagun Village community.