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This research is motivated by the importance tank cleaning process on tankers to prevent cargo contamination, maintain cargo quality, and ensure crew safety. MT. Marina Prosperity, a chemical/oil tanker, uses the Butterworth system as the primary method for tank cleaning at every cargo change. However, in practice, technical and operational constraints are still found that affect the results of tank cleaning. The research method used is descriptive qualitative with data collection techniques through direct observation on the ship, interviews with the Chief Officer and Boatswain, and documentation studies in the form of log books and SOPs. Data were analyzed by focusing on three aspects, namely work efficiency, work safety, and operational procedures for using Butterworth. The results show that the use of Butterworth can increase time and energy efficiency compared to manual methods, with an average cleaning time of 2–4 hours per tank depending on the type of cargo. From a safety aspect, Butterworth reduces the need for crew to enter the tank, thereby reducing the risk of exposure to chemicals and hazardous atmospheres. However, work effectiveness and safety are greatly influenced by the condition of the equipment, the stability of water pressure, and the crew's discipline in implementing the SOP. On several occasions, steps such as nozzle cleaning, manual mopping, and safety meetings were not consistently performed, resulting in residual load in certain areas. With routine equipment maintenance, close supervision, and ongoing crew training, Butterworth can be optimized to produce more effective, safe, and standards-compliant tank cleaning process.

This research aims to analyze the influence of thermal conditions; specifically the temperature difference between the test object and the environment; on the characteristics of air flow and heat transfer around it. The object of this study is a test piece subjected to free air flow under various temperature conditions; focusing on the convection heat transfer phenomenon. The main problem addressed is how temperature variations affect the convection heat transfer coefficient; heat transfer rate; and heat flux; as well as changes in air velocity and pressure profiles. Therefore; the objective of this research is to quantitatively compare and assess these thermal and fluid parameters through an experimental study approach and Computational Fluid Dynamics (CFD) simulation. The methodology involves direct measurement of temperature and pressure parameters under low and high-temperature conditions; which are then processed to determine the convection coefficient (); heat transfer rate (); and heat flux (). The main findings indicate that at low-temperature conditions; the heat transfer coefficient () was found to be 53.26 ; the heat transfer rate () was 24.99 W; and the heat flux () was 537.87 ; with a pressure drop of 0.86 Pa. In conclusion; thermal conditions play a crucial role in determining the dynamics of air flow and the efficiency of heat transfer; the greater the temperature difference (); the higher the potential heat transfer rate; establishing a strong correlation between thermal conditions and the convection phenomenon.

Coastal areas are highly dynamic and increasingly exposed to physical pressures such as coastal erosion, shoreline change, inundation, and sea-level rise. In Indonesia, most coastal vulnerability studies remain focused on physical mapping and have not been systematically integrated with spatial planning evaluation. This study aims to analyze physical coastal vulnerability using the Coastal Vulnerability Index (CVI) and integrate the results with the Regional Spatial Plan (RTRW) in the coastal areas of Mangarabombang and Laikang Sub-districts, Takalar Regency. A quantitative spatial approach was applied using eight parameters, which were reclassified into vulnerability scores, transformed into CVI values, and classified using quartile methods. The results show that high and very high vulnerability classes dominate the coastal area. Spatial integration reveals that several development zones intersect with high vulnerability levels, indicating potential spatial mismatch. This study confirms that CVI can be operationalized as a spatial evaluation tool to support adaptive and risk-based coastal planning.

Heating, Ventilating, and Air Conditioning (HVAC) systems often suffer from significant energy wastage due to their inability to adapt to real-time environmental changes, leading to high operational costs. Although Proportional-Integral-Derivative (PID) controllers are widely used for their simplicity and reliability, they struggle to handle the complex dynamics of modern environments, requiring advanced optimization to enhance efficiency. This study aims to optimize PID controllers by integrating the Queen Honey Bee Migration (QHBM) algorithm to improve HVAC performance, energy efficiency, and adaptability. The research method employs an experimental approach that compares the performance of conventional PID controllers with PID controllers optimized using the QHBM algorithm under dynamic environmental conditions. The results show that the PID-QHBM system significantly outperforms the conventional PID system, achieving a rise time of 0.2649 seconds and a settling time of 1.6874 seconds with an almost negligible steady-state error of 9.4991e-08. Although it experiences a slight overshoot of 16.3810%, the system stabilizes quickly and maintains the target temperature efficiently. In contrast, the conventional PID controller exhibits slower response characteristics, with a rise time of 1.3730 seconds, a settling time of 2.5144 seconds, and a larger steady-state error of 0.0361. This study demonstrates that integrating the QHBM algorithm into PID controllers provides a more effective solution for real-time temperature control, offering substantial improvements in energy efficiency and system performance. The findings contribute to advancing intelligent HVAC control systems that can better adapt to environmental variations while minimizing operational costs.

Environmental damage caused by human activities has become an increasingly pressing global issue. Poetry as a literary work has the power to represent ecological problems symbolically and critically. This study aims to describe the representation of the impact of the environmental crisis in Taufiq Ismail's poems, namely "Menengajah Ke Atas, Merenungi Ozone yang Tak terlihat" and "Membaca Tanda-Tanda." The analysis is based on Greg Garrard's ecocritical study. This study uses a qualitative method with content analysis techniques. There are two stages of analysis, namely the literal and symbolic meaning of the poems, then an ecocritical interpretation is carried out based on Garrard's categories which include pollution, wilderness, apocalypse, dwelling, animals, and earth. The results of the study indicate that both poems represent the impact of the environmental crisis through health problems due to pollution and radiation, damage to water and forest ecosystems, climate change, threats to human living space, and the decline in biodiversity. The research findings also show that the most dominant categories are pollution and apocalypse, which confirms that the environmental crisis in Taufiq Ismail's poems is the result of human behavior that ignores nature. Thus, Taufiq Ismail's poems not only function as aesthetic works, but also as cultural criticism and moral warnings for humanity.

This study examines the role of innovation management in learning to improve the quality of basic education, particularly in elementary schools. The background of this research is the increasing demand for adaptive, creative, and student-centered learning approaches in response to rapid educational changes in the digital era. The objective of this study is to analyze how the implementation of innovation management strategies in learning can enhance teaching effectiveness, student engagement, and overall educational quality. This research uses a qualitative descriptive method through literature review by analyzing relevant books, journals, and previous studies related to learning innovation and educational management. The findings indicate that effective management of learning innovation—such as the integration of technology, the use of active learning models, and teacher professional development—significantly contributes to improving student learning outcomes and classroom interaction. Furthermore, innovation management encourages teachers to be more creative in designing learning activities that are contextual and meaningful for students. The study implies that schools and education stakeholders need to strengthen institutional support, provide continuous training for teachers, and develop policies that encourage sustainable innovation in learning. Thus, structured innovation management in learning becomes a key factor in enhancing the quality of basic education in a competitive global era.

The Village Fund Policy is a state instrument in realizing village-based national development as mandated by Law Number 6 of 2014 concerning Villages. The Village Fund was designed as a form of state affirmation for villages that have experienced development inequality for years. However, in practice, the policy of cutting or reducing the allocation of the Village Fund resulting from changes in national fiscal policy, budget refocusing, and state economic pressures has created serious problems for the direction of the legal politics of village development. This study aims to analyze the legal politics of cutting the Village Fund and its implications for the principle of social justice as contained in the fifth principle of Pancasila and Article 33 of the 1945 Constitution of the Republic of Indonesia. The study uses a normative juridical method with a legislative approach, a conceptual approach, and a philosophical approach. The sources of legal materials consist of primary legal materials in the form of laws and regulations, secondary legal materials in the form of books, journals, and scientific articles, and tertiary legal materials in the form of legal dictionaries and encyclopedias. The results of the study indicate that the cutting of the Village Fund in legal politics indicates a shift in the state's orientation from the welfare state concept to a more centralized and pragmatic fiscal approach. This policy has hampered village development, increased social inequality, weakened village community empowerment, and potentially violated the principle of distributive justice. Therefore, fiscal policy regarding Village Funds should maintain villages as the primary subjects of national development by strengthening the principles of fiscal decentralization and social justice. Keywords: Legal Politics, Village Funds, Social Justice, Welfare State, Fiscal Decentralization..

This study aims to analyze the implementation of digital marketing in increasing sales of small and medium enterprises (SMEs) in the bedding equipment sector on online platforms. The background of this research is driven by the high level of competition in marketplaces and the need for business actors to optimize digital marketing strategies to remain competitive. The research method used is Participatory Action Research (PAR), combined with SWOT analysis to identify business conditions comprehensively. Data collection techniques were carried out through direct observation of production and marketing activities. The results show that the implementation of digital marketing through marketplaces and social commerce can expand market reach, increase sales volume, and enhance the business actor’s understanding of managing online marketing strategies. In addition, product content optimization, the use of promotional features, and customer service play an important role in increasing consumer trust and purchase decisions. However, challenges such as high advertising costs and frequent changes in platform policies were also identified. Overall, this study concludes that well-planned and efficient digital marketing strategies can improve competitiveness, profitability, and business sustainability of SMEs in the digital era.

This Community Service Program aims to strengthen the role of Baduy youth in decision-making based on local wisdom in facing social change. Baduy youth hold a strategic position as successors of cultural values; however, they also face challenges due to increasingly dynamic social changes. Therefore, strengthening efforts are needed to ensure that they are able to preserve traditional values while adapting to contemporary developments. This activity was conducted in Kanekes Village, Lebak Regency, on April 17, 2026, using participatory, educational, and collaborative approaches involving customary leaders and Baduy youth as the main partners. The implementation methods included socialization sessions, group discussions, and simulations of decision-making based on local wisdom. The results show an increase in the understanding and involvement of youth in recognizing the importance of local wisdom as a foundation for decision-making. The participatory approach proved effective in enhancing awareness and encouraging active participation of youth in preserving cultural values. In conclusion, this program successfully strengthens the role of Baduy youth as both cultural preservation agents and social adaptation actors in responding to ongoing social change.

Digital transformation in the tax sector is a strategy of the Direktorat Jendral Pajak (DJP) to improve the quality of service and taxpayer compliance. One form of this transformation is the implementation of the Coretax system as an integrated tax administration system that replaces the DJP Online system. This system change poses adaptation challenges for taxpayers, particularly in reporting Annual Tax Returns, which has the potential to affect the accuracy of tax payments. This study aims to analyze the optimization of the transition of Annual Tax Return reporting through the Coretax system on the accuracy of individual taxpayer payments at the North Sidoarjo Tax Office (KPP Pratama). The research method used is descriptive qualitative with data collection techniques such as observation of the Annual Tax Return reporting assistance process, documentation, and interviews with three taxpayers. The results show that the Coretax system is able to improve the accuracy of tax filing through data integration and automatic validation, thereby encouraging the accuracy of the amount and timeliness of tax payments. However, technical system constraints and limitations in taxpayer digital literacy were still encountered during the transition period. Assistance from tax officers and tax volunteers proved to be instrumental in helping taxpayers adapt to the Coretax system. This study concludes that optimizing the transition of the Coretax system requires a combination of system improvements and strengthening taxpayer education to achieve sustainable accuracy of tax payments.

Adolescence is a transitional period marked by rapid biological, psychological, and social changes, which often lead to various problems for individuals, particularly at the high school level. This study aims to analyze the role of guidance and counseling services in addressing these issues using a literature review approach. The method employed is a systematic literature review of relevant scientific publications from 2020 to 2026. The data collection process was carried out through the search, selection, and evaluation of literature related to student issues and guidance and counseling services in schools. The research findings indicate that students face various challenges, such as difficulties in learning, low academic ability, academic stress and anxiety, as well as social-emotional issues influenced by internal and external factors. Guidance and counseling services play a role in supporting students to self-reflect, overcome problems, and optimize their potential through preventive, curative, and developmental approaches. The success of these services is also supported by the role of counselors, collaboration with other teachers, and parental participation. However, in practice, there are still a number of obstacles, such as limited human resources, a lack of coordination, and an incomplete understanding of the functions of these services. Therefore, efforts are needed to improve implementation and cooperation so that guidance and counseling services can operate more efficiently.

Low-rank coal generally has a high moisture content, which results in a low calorific value and suboptimal quality for utilization as an energy source. One method that can be applied to improve coal quality is the Upgrading Brown Coal (UBC) process, which functions to reduce moisture content and increase fixed carbon value. This study aims to analyze the effect of heating time and the ratio of used oil composition on improving coal quality based on proximate parameters. The research method includes collecting coal samples from four locations in Samarinda and its surrounding areas, namely SMAN 1 Samarinda, Bhineka Street, Palaran Stadium, and Tani Bakti Village. The samples were analyzed using proximate analysis, including inherent moisture (IM), ash content (AC), volatile matter (VM), and fixed carbon (FC), both before and after the UBC process. The upgrading process was carried out with variations in heating time and used oil composition as a coating medium to enhance coal stability and prevent moisture reabsorption. The final results of the upgrading process showed the best values of inherent moisture at 13.64%, ash content at 4.66%, volatile matter at 55.06%, and fixed carbon at 44.94%. The results indicate that the UBC process is capable of reducing inherent moisture and increasing fixed carbon, thereby improving coal quality. Variations in heating time and used oil composition have a significant effect on changes in proximate parameters. Longer heating time and an appropriate ratio of used oil composition result in a more optimal improvement in coal quality.

Background: Acne vulgaris is a chronic inflammation of the pilosebaceous unit caused by multiple factors, characterized by the presence of comedones, papules, pustules, nodules, and cysts. This condition commonly affects adolescents and often leads to psychological impacts, particularly decreased self-confidence. During adolescence, sensitivity to physical appearance tends to increase, making facial changes such as acne influential on social interactions, self-esteem, and even academic performance. Objective: This study aims to determine the relationship between the severity of acne vulgaris and the level of self-confidence among students of SMA Al Irsyad Surabaya in 2025. Methods: The research employed an analytical design with a cross-sectional approach and involved a population of 90 students, from which 73 were selected as samples using purposive sampling based on inclusion and exclusion criteria. The severity of acne vulgaris was assessed using an observation sheet based on the Lehmann classification, while self-confidence levels were measured using the Rosenberg Self-Esteem Scale (RSES). Data were analyzed using the Spearman Rank correlation test. Results: The findings showed that most students experienced mild acne vulgaris (49.3%) and had a high level of self-confidence (64.4%). There was a significant relationship between acne severity and self-confidence (p = 0.008), indicating that the more severe the acne, the lower the level of self-confidence. Conclusion: This study is expected to serve as a basis for schools and healthcare providers in developing educational programs and psychological support for adolescents

The development of information technology, particularly the use of smartphones, has changed human activity patterns and significantly impacted the education sector. The "one-stop-shop" concept reflects the use of mobile devices as centers for various activities, including learning. This situation drives the need for innovation in the development of adaptive and interactive learning media. One solution that can be developed is an Android-based mobile application using Flutter, which can increase the effectiveness and efficiency of the learning process. The Association of Multimedia and Information Technology Professionals (PPMultindo), an organization focused on technology, has developed an Android-based learning platform. This platform is designed to provide flexible access to materials, support interactivity, and facilitate collaboration between educators. Features such as learning analysis, material recommendations, and automatic evaluation are expected to improve the quality of the learning experience. However, the implementation of this technology still faces various challenges, including limited technological competence of educators, inadequate infrastructure, and adjustments to curriculum needs. Therefore, collaborative efforts are needed to optimize the use of mobile technology to support educational transformation in the digital era.

This study aims to analyze the factors that influence the residential spatial system of the Marori and Mengge ethnic groups in Wasur Village, Merauke, South Papua, in the context of their involvement in the eucalyptus oil industry as a leading tourism product of Wasur National Park. A rationalistic qualitative approach is used with the main theory of behavioral setting to examine the relationship between behavior, local culture, and spatial structure. The results of the study indicate that houses not only function as domestic spaces, but also as places for the production of eucalyptus oil, especially at the packaging stage. The overlapping use of space causes space invasion, changes in function, and the emergence of high spatial flexibility. The space of the house undergoes a temporal functional transformation, adjusting to the intensity of economic activities and cultural rituals of the community. Private, semi-public, and spiritual spaces experience shifting boundaries, which have an impact on social relationship patterns and living comfort. This study also found that social structure, customary values (Boan/marga), and division of customary areas play an important role in the formation of the spatial system. These findings are expected to be an important contribution to the development of residential architecture based on behavior and local wisdom, as well as community-based conservation area management. This study also highlights the urgency of preserving the culture and existence of indigenous tribes amidst the current of modernization and the threat of extinction.

The Alpha generation is currently facing big challenges in balancing virtual activities and real life, where the high intensity of using devices often shifts priorities for worship, especially during the month of Ramadan. This dependence on digital screens triggers individualistic attitudes and reduces children's levels of religious participation. Therefore, this community service activity aims to increase the capacity of parents and children to implement time management and limit screen time effectively. The method used is a social marketing approach combined with participatory observation techniques, interactive visual promotions, and educational simulation games which were implemented in the Imaduddin Mosque Youth Hall, Medokan Ayu, Surabaya. The results of the activity showed a significant increase in understanding among children and parents regarding the importance of setting time limits for using devices. Generation Alpha children responded positively by enthusiastically setting their own daily priority scale between playing and worshiping without feeling forced. The implications of this activity include long-term changes to the social and spiritual dynamics of residents, the creation of a more harmonious family environment with minimal conflict related to confiscation of devices, as well as the revival of the function of mosques as centers of communal interaction for the younger generation. It is hoped that the independence of citizens in educating children will be able to build the foundation for a future generation that is digitally intelligent, mentally healthy and has a strong religious character.

Christian Religious Education (PAK) learning is undergoing significant changes in the Digital 5.0 era with the utilization of technology as the main support. This study explores the challenges in Christian learning and explores technological solutions that can improve student engagement and material comprehension. Through the literature study, the main challenges identified include the limitations of traditional learning resources and the lack of attractiveness of the materials. Solutions are proposed by integrating E-Learning, Virtual Reality, Augmented Reality, and mobile applications in the curriculum. Teacher training and support from the community and church are key in implementing this approach. Continuous evaluation and problem solving are the focus to ensure success and sustainability. The results show that technology contributes significantly to creating an interactive and relevant learning environment, building a solid foundation for increased student engagement and understanding of Christian teachings. By stepping with technology, this article presents a foundation for enhancing Christian Religious Education learning amidst the dynamics of the digital world

This community service program aims to improve the Islamic character and morals of adolescents through religious development activities based on active community participation. This program is implemented using an Asset-Based Community Development (ABCD) approach that emphasizes the utilization of local assets and potential, such as support from religious leaders, mosque facilities, and youth enthusiasm. The implementation method includes observation, participatory planning, implementation of development activities such as prayers, religious sermons, and worship habits, as well as joint evaluation. The results of the activities show an increase in adolescent participation in religious activities, changes in behavior towards a more positive direction, and increased spiritual and social awareness. In addition, this activity has an impact on strengthening community solidarity and creating a more religious and harmonious environment. Thus, the ABCD approach is effective in optimizing local potential to support the development of Islamic character in adolescents in a sustainable manner.

Waste is a growing environmental issue, particularly in residential areas lacking effective waste management systems. This community service activity aims to improve environmental literacy through a waste management education program implemented in collaboration with the Ija Plastic Gang community. The methods used include outreach, participatory education, household-based waste management training, and ongoing mentoring. The results of the activity indicate an increase in community understanding regarding waste types, sorting methods, and simple recycling practices. Furthermore, the formation of new habits in waste management is an indicator of the program's success. The activity also fostered a sense of collective responsibility among community members toward maintaining a clean and healthy living environment. Through consistent mentoring and hands-on practice, participants demonstrated greater confidence in applying waste reduction strategies at the household level. The collaboration with the Ija Plastic Gang community proved instrumental in accelerating behavior change, as peer-to-peer engagement strengthened motivation and accountability. Ultimately, this initiative highlights the importance of integrating environmental education into community development programs to achieve long-term ecological sustainability.

Poverty in Indonesia remains an unresolved social problem and poses a structural challenge to the government. Improving the quality of life of vulnerable communities requires deeper intervention. Therefore, to assist and improve the quality of life of vulnerable communities, the government has launched various assistance programs, one of which is the Family Hope Program (PKH). The Family Hope Program (PKH) is present not only to support the community's economy but also encourages behavioral changes in PKH beneficiaries, particularly in the context of children's education, maternal and toddler health, and protection for vulnerable groups. This program is implemented in various areas of Surabaya City, one of which is the Sidotopo Village, Semampir. In this area, there are still underprivileged groups. The PKH program has significantly assisted beneficiaries in the Sidotopo area in improving their socio-economic welfare. The purpose of this evaluation is to describe the implementation of PKH in terms of effectiveness, equity, targeting accuracy, and the impact of program implementation on beneficiaries in the Sidotopo area. This evaluation uses data collection techniques based on observations and interviews with PKH mentors and PKH beneficiaries in the Sidotopo Village, as well as documentation studies. Based on the research results, it is clear that the implementation of the Family Hope Program (PKH) in Sidotopo has been effective, equitable, and well-targeted in improving the welfare of its residents. This is evident in the decline in poverty rates and increased access to education and healthcare.