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Nile tilapia (Oreochromis niloticus) culture requires an efficient and low-cost feeding strategy that can support fry growth and survival. This study aimed to analyze the effects of three types of natural feed, namely silk worms, earthworms, and snails, on absolute length growth, absolute weight growth, and survival of Nile tilapia fry. The study was conducted at the Aquaculture Laboratory, Faculty of Science and Computer Science, Universitas Muhammadiyah Gorontalo, from January 31 to March 2, 2026. An experimental method was applied using a Completely Randomized Design consisting of three treatments and three replications. A total of 45 Nile tilapia fry were reared in 9 plastic containers filled with 10 L of water, with 5 fish in each container. Growth and survival data were analyzed using ANOVA at the 5% significance level, while water quality was analyzed descriptively. The results showed that the type of natural feed had no significant effect on absolute length growth, absolute weight growth, and survival. Descriptively, silk worms produced the highest length and weight growth, with values of 2.99 cm and 6.37 g, respectively. Snails produced the highest survival rate of 86.66%. Water quality remained stable, with temperature ranging from 26.3 to 26.8°C, pH from 7.6 to 7.9, and dissolved oxygen from 5.2 to 5.6 mg/L. These findings indicate that silk worms are potential natural feed for improving growth, while snails support the survival of Nile tilapia fry.

Plastic waste management in rural areas, particularly in tourism villages, remains an environmental challenge that requires sustainable solutions. Negeri Tongging Village, as a tourism area around Lake Toba, has experienced an increase in household plastic waste that has not been managed optimally, potentially affecting environmental quality and community well-being. This community service activity aimed to enhance community awareness and capacity in plastic waste management through the implementation of a circular economy approach based on a waste exchange program and ecobrick production. A participatory approach was employed by actively involving the community in all stages of the activity, including socialization, program implementation, and evaluation. The program was carried out during the 2025 Community Service Program of Universitas Islam Negeri Sumatera Utara, consisting of circular economy socialization, collection of plastic waste through an exchange scheme with basic necessities, training on ecobrick production, and the provision of supporting facilities for environmental cleanliness. The results indicate an increase in community participation and environmental awareness, a reduction in improperly disposed plastic waste, and an improvement in community skills in processing plastic waste into useful products. In addition, the activity strengthened mutual cooperation and environmental responsibility among community members. In conclusion, the application of a circular economy approach through ecobrick-based activities can serve as an effective alternative solution for plastic waste management while simultaneously supporting sustainable community empowerment in rural tourism areas.

This community service program was conducted by Group 7 of KKN ITB Ahmad Dahlan Lamongan in Bapuhbandung Village, Glagah District, Lamongan Regency, aiming to address environmental and public health issues through the utilization of ecobricks and the cultivation of family medicinal plants (TOGA). The main problems identified were low awareness of plastic waste management and the underutilization of home yards for medicinal plants. The program applied a participatory assistance method involving students, parents, youth, and village officials throughout the stages of observation, planning, implementation, and evaluation. The results showed that more than 300 ecobricks were produced and assembled into an installation forming the word “BAPUHBANDUNG,” which now serves as a new village icon. In addition, medicinal plants such as ginger, turmeric, and lemongrass were planted around the installation area and residents’ yards. The evaluation indicated high community participation, good-quality ecobricks, and positive initial growth of TOGA. This program not only produced physical outputs but also increased community awareness of plastic waste management, family health independence, and the strengthening of village identity.

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.

Waste management remains a serious problem, particularly in rural areas, which generally have relatively low levels of environmental awareness. Inorganic waste such as plastic, glass, and aluminum is a major concern because it takes hundreds of years to decompose naturally. This situation poses potential long-term environmental hazards, including soil and water pollution, and ecosystem disruption. Therefore, effective educational efforts are needed to raise public awareness of waste issues. This community service activity was carried out in Sarah Perlak Village, Sungai Mas District, West Aceh Regency. The focus of the activity was the installation of educational signs containing information about the decomposition time of various types of waste. Implementation methods included direct observation to identify specific problems at the site, informal outreach to local residents, demonstrations related to waste sorting, and the creation and installation of educational signs. The signs were made from wooden planks and decorated with real waste such as plastic bottles, aluminum cans, and used paper, thus providing a tangible visualization to the community. The results of the activity showed that the visual approach through educational signs was able to attract the attention of residents, both children and adults. The information was presented clearly and accompanied by real-life examples, making the message easier to understand and remember. In addition, direct interaction through outreach and demonstrations provided an opportunity for residents to ask questions and share experiences related to waste management. Overall, this educational medium has proven effective in conveying environmental messages, raising awareness, and motivating the community to start sorting and reducing waste at the source. Going forward, this program is planned to be expanded through training in processing waste into useful products, thereby not only reducing pollution but also providing economic benefits to the community.

This study aims to find the most dominant type of waste that damages the coastal area of ​​Putra Deli Beach, Deli Serdang Regency. Based on field observations and interviews with local people, it was found that inorganic, including plastic, is the type of waste that damages the coastal environment the most. Plastic waste persists such as beverage bottles, plastic bags, styrofoam, and food wrappers which are dominant because they do not decompose quickly. This condition is exacerbated by the low public awareness in maintaining cleanliness and the lack of adequate waste management facilities. The impact is not only visually polluting the environment, but also threatening the marine ecosystem, public health, and reducing the value of local tourism. The results of this study are expected to be the basis for mitigation efforts and improving waste management in coastal areas.

Coastal environmental pollution is an increasingly complex problem in Indonesia, especially due to uncontrolled waste disposal. This study aims to analyze the impact of waste disposal on the environment in the coastal area of Putra Deli Beach, Deli Serdang Regency. The research approach used is mixed-method with data collection through direct observation, semi-structured interviews, and literature study. The results showed that plastic waste dominates the types of waste found at the research site and is the main cause of marine ecosystem pollution. The impacts include damage to marine biota habitat, decreased tourist attraction, public health problems, and economic losses for local businesses. The lack of waste management facilities and low environmental awareness also exacerbate this condition. Therefore, an integrated waste management strategy based on community and stakeholder collaboration is needed to maintain the sustainability of the coastal environment.

Education plays an important role in student development, especially in developing effective communication skills or public speaking. This community service aims to improve the creativity and public speaking skills of students at SDN Sumput, Sidoarjo, through socialization activities for making flower pots from plastic bottle waste. The main problems identified were the lack of self-confidence and public speaking skills among grade 5 students. Lack of interest and motivation as well as fear of public speaking hinder the learning process. The implementation method includes environmental observation, problem identification, activity coordination, and implementation of socialization and mentoring. This socialization was carried out on July 29, 2024, involving 15 students divided into 3 groups. Students were accompanied by KKN students in the process of recycling plastic bottles into flower pots and were trained in public speaking through presentations of their work. The results of this activity show that students not only improve their creative and public speaking skills, but also understand the importance of waste management and environmental awareness.

Digital transformation in the public transportation sector is part of the national development priority agenda aimed at improving service quality and operational efficiency. This study aims to analyze the implementation of cashless payment-based digital transformation in public transportation policy on the Suroboyo Bus in Surabaya, analyze service quality based on SERVQUAL dimensions, identify supporting and inhibiting factors for implementation, and evaluate the success and shortcomings of the policy. This research uses a qualitative approach with a descriptive research type. The results show that the implementation of cashless payment on the Suroboyo Bus has been running well since 2018, with four main payment methods: QRIS, e-money cards, plastic waste contributions, and the Child Identity Card (KIA). QRIS has become the dominant payment method with a 48% share in 2025. Service quality based on SERVQUAL dimensions shows good results in the aspects of tangibles, reliability, and responsiveness, but still requires improvement in the dimensions of assurance and empathy. Supporting factors for implementation include government commitment, the availability of regulations (Perwali No. 22 of 2023)., adequate infrastructure, and support from digital payment service providers. Inhibiting factors include limited digital literacy, internet network disruptions, limited economic access, and lack of socialization. The success of the policy is reflected in increased operational efficiency, financial transparency, and a rise in the number of users from 1.2 million (2019). to 3.5 million (2025). Shortcomings of the policy include the digital gap for vulnerable groups, dependence on internet networks, and a decrease in participation in the plastic waste payment program from 25% (2023). to 12% (2025).

Plastic waste is a global problem that is increasing every year because it is difficult to decompose. This article discusses the growth in waste volume in Indonesia which is triggered by population growth, urbanization, and changes in consumption patterns, as well as the main challenges in waste management at the Bantargebang TPST. Through a qualitative approach and case studies, this article highlights the need for a comprehensive approach to waste management, including the establishment of waste banks and increasing public awareness. The main challenges at the Bantargebang TPST include decreasing capacity and difficulties in handling single-use plastic waste. The proposed solutions include expanding TPST capacity, implementing environmentally friendly technology, increasing public awareness, developing adequate infrastructure, and greater funding allocation. Collaboration between the government, the private sector and the community is the key to overcoming this challenge and building a sustainable and environmentally friendly waste management system at the Bantargebang TPST.

Healthcare services, conflicts often arise between doctors and patients, involving allegations of medical criminal actions. Health laws are designed to provide greater certainty in the administration of healthcare services and to offer protection for both the public and healthcare resources. This research adopts a normative juridical approach, employing qualitative descriptive methodology. Medical professionals may face criminal charges for engaging in illegal abortions, performing reconstructive and aesthetic plastic surgery with the intent to alter someone's identity, refusing healthcare services in emergency situations, committing negligence, and practicing Without a License (STR) and/or Practice Permit (SIP). Medical professionals are obliged to adhere to professional standards, service standards, and operational procedure standards, while upholding the values of professional ethics and exerting their best efforts (Inspanning Verbintenis). Dispute resolution should initially take place through restorative justice mechanisms, utilizing alternative methods outside the court.

The dangers of plastic waste are common and disturb both the water, land and air. Ecobricks are a creative way to reduce plastic waste by putting clean plastic waste into plastic bottles and the results will be used for human benefit. Making ecobricks is not yet popular among the wider community. This service activity will provide benefits to various parties, including the community, community service participants and the government. The targets for this service activity are Maura El-Mumtaz Elementary School students in the Tanah Seribu sub-district, Binjai City. Based on the results of community service activities that have been carried out, it can be seen that students can make seats from ecobricks. It is hoped that students will be able to express many more ideas for making ecobricks, not only making them in the form of chairs but also in other shapes. So this can be used as a business opportunity for the community  

This service aims to introduce a hydroponic vegetable cultivation system using the wick method in Sungai Pagar Village. The environment in Sungai Pagar Village is characterized by sandy soil due to the accumulation of peat soil, so plant cultivation activities are still limited. In this context the wick method is adopted as a relevant solution. Training activities were carried out through several stages, including field surveys, delivery of materials, sowing seeds, making AB mix nutrition, making a hydroponic wick system from used plastic bottles, and monitoring and evaluation. The results of the training showed an increase in participants' knowledge about hydroponic cultivation and their abilities in caring for hydroponic plants. Each training participant succeeded in making a hydroponic wick system using used plastic bottles and was given a hydroponic cultivation package to continue cultivation at home. In order to improve food security and the community's economy, this training made a positive contribution by introducing an environmentally friendly and hydroponic vegetable cultivation system. efficient. In conclusion, this training was successful in introducing and training the public in hydroponic vegetable cultivation using the wick method.

The purpose of this study was to investigate the execution of measures aimed at lowering the utilization of plastic bags within the retail market of Jepara Regency. The research employs a qualitative methodology, utilizing descriptive analytic techniques. The data-gathering process involved conducting an interview with the Head of Hygiene and Waste Management at the Jepara Regency Environment Office, who served as a key informant. In order to gather comprehensive data, interviews were conducted with both sellers and buyers at retail stores in Welahan, Mayong, and Pecangaan sub-districts. The findings of the study indicate that the implementation of the policy is facilitated by socializing activities, particularly in the context of communication and transmission. The Jepara regency government has conducted socialization efforts throughout nearly all marketplaces, demonstrating a clear and consistent approach. The implementation of policies involves the participation of human resources, namely the Environment Office, as the responsible entity. The necessary financial resources for policy implementation are also obtained through the Regional Revenue and Expenditure Budget. Regarding disposition, policy implementers have a preexisting commitment to effectively executing their responsibilities and exhibit a democratic mindset. In relation to bureaucratic organization, the execution of government policies is already directed by the established Standard Operating Procedure. However, there are still challenges for the government in terms of public response and low understanding of the dangers of using plastic bags.

Advertising is one of the mass communication media in the form of visual, audio, writing, or a combination of audio-visual. As with any communication in general, every advertisement must have an implicit or explicit meaning contained therein which is addressed to the public. Marajan as one of the syrup products in Indonesia, often makes advertisements that are full of meaning with attractive packaging. The purpose of this study is to find out the meaning of the dragon in Marjan 2023 advertisement "Baruna Sang Guardian of the Ocean" by using a qualitative descriptive theory approach and Roland Barthes' Semiotics theory which interprets something based on the denotative and connotative meanings of signifiers, signifieds and signs that exist in an object. The results of this study indicate that the dragon in the ad refers to a social disaster caused by humans who often throw plastic waste into the ocean.

The presence of plastic in today's contemporary era, has various functions that greatly help people's lives. Plastic with all its properties, which are more inclined to the many advantages of its use and flexibility so that it is easy to use in various fields of life. With this fact, there are more and more products that rely on plastic as a basic ingredient in the manufacture of their products. This is of course supported by very high market demand, so that all types of production of goods made from plastic are mushrooming. If we return to our original purpose, the creation of plastic was indeed used as a substitute for paper bags, which at that time was experiencing a crisis of threats due to the increasing number of illegal logging incidents, so that there was a potential for the scarcity of the trees themselves. However, the opposite is currently true, where the use and production of plastics is increasingly dominating, making the remaining production waste and waste resulting from its use even more insurmountable. This is compounded by the fact that plastic is difficult to decompose, requiring hundreds of years of time. This, in the concept of a risk society is called the boomerang effect, because something that existed in the industrial era was created as a form of innovation that exists as a solution, but in the modern era like now it has become a separate risk for the surrounding community. For various phenomena as a result of the creation of plastic itself, society does not necessarily let them slowly be swallowed up by existing risks, but there are many efforts to create innovations as a way to protect themselves from various risks distributed by production and the increasingly widespread use of plastic in today's reality.

Hasil observasi di lapangan bahwa 1) Guru dan siswa membutuhkan media permainan yang dapat meningkatkan bahasa anak. Media yang dimaksud adalah media yang terbuat dari bahan ringan, contohnya dari kayu dan plastic dan hemat serta mudah dibawa, selain itu media yang diharapkan dapat memberi daya tarik bagi anak dalam melakukan permainan dengan media tersebut. 2) Desain pengembangan media permainan buy and sell berbasis mind mapping terdiri dari beberapa tahap. Tahap pertama yaitu gambar mind mapping dengan kombinasi warna gambar mind mapping ini terdiri dari tiga jenis gambar yaitu gambar pada toko indah, toko ceria dan toko bahagia, kemudian buah-buah mainan yang dijual yang terdiri dari buah jambu, belimbing, pisang, sirkaya dan jeruk serta buah salak, kemudian kotak penjualan.

Mesin Computer Numeric Control ( CNC ) adalah pengembangan dari mesin yang sudah ada sebelumnya tetapi belum menggunakan computer, masih menggunakan model sebagai contoh duplikasinya yang disebut Numeric Control ( NC ). Mesin Computer Numeric Control ( CNC ) pada awalnya dipergunakan sebagai alat cetak industri terutama pada bidang mesin dan otomotif. Computer Numeric Control ( CNC ) pada dasarnya dapat memakai bahan apa saja yang secara fisik bisa digrafir atau dibor ( dengan penyesuaian tertentu pada alat potongnya sesuai klasifikasi bahan ). Bahan material dasar yang sering dipakai dengan Mesin Computer Numeric Control ( CNC ) antara lain : metal / besi, kayu, plastic dan aluminium. Dari beberapa hal tersebut apakah mesin Computer Numeric Control ( CNC ) dapat berperan dalam sebuah karya arsitektur yang dihasilkan seorang arsitek?, atau apakah nantinya dengan adanya teknologi semacam ini peran arsitek tak lagi dibutuhkan? Pada sebuah karya arsitektur material bahan bangunan fabrikasi yang dihasilkan oleh Mesin Computer Numeric Control ( CNC ), biasanya dipakai sebagai finishing, walau tidak menutup kemungkinan dipakai sebagai sebuah struktur dengan rekayasa tertentu, dan juga material fabrikasi semacam ini dipakai sebagai bagian dari interior maupun produk produk furnitur hingga pelengkap suatu ruangan seperti vas, lampu, rak, dll. Produk Computer Numeric Control ( CNC ) pada sebuah karya arsitektur juga sangat indah dinikmati sebagai komponen yang diekspos pada bangunan. Suatu hasil dari produk Computer Numeric Control ( CNC ) tidak dapat dikategorikan sebagai karya arsitektur apabila hanya indah tetapi tanpa makna. Seorang arsitek menggunakan Mesin Computer Numeric Control ( CNC ) adalah sebagai tools atau alat kepanjangan tangan untuk menerjemahkan konsep dan arti dari sebuah karya arsitektur.