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Yusuf Mahendra Surya; Sandy Bagus R; Rafni Aya S; Intan Nur Fadilla; Agatha Jumiati

Jurnal Ilmu Hukum Sosial dan Humaniora 2026 Lembaga Pengembangan Kinerja Dosen

Land ownership disputes without rights are a common land issue that disrupts legal certainty for legitimate landowners. Although the national land law system has regulated land registration and the issuance of certificates as forms of legal protection, in practice conflicts are still found between physical possession and legal ownership. This research aims to analyze the legal status of the rightful landowner and the forms of legal protection in land ownership disputes without rights. The research method used is normative legal research with a statutory approach and a conceptual approach, examining Law Number 5 of 1960 concerning Basic Agrarian Regulations, Government Regulation Number 24 of 1997, and Government Regulation Number 18 of 2021. The research results show that land ownership certificates have strong evidentiary power and place the legitimate landowner in a more protected legal position, while unauthorized land possession does not gain legal legitimacy and can be qualified as an unlawful act. Therefore, legal protection for legitimate landowners must be consistently enforced to achieve legal certainty and justice in the field of land ownership.

Elkanalisa Togatorop; Muliono Muliono; Galank Pratama

Jurnal Ilmu Pertahanan, Politik dan Hukum Indonesia 2026 Asosiasi Peneliti dan Pengajar Ilmu Hukum Indonesia

The land conflict between the Pandumaan-Sipituhuta indigenous community and PT Toba Pulp Lestari is a form of agrarian conflict involving claims to control customary territory and corporate interests. This study aims to analyze the role of the Indigenous Peoples Alliance of the Archipelago (AMAN) in this conflict. The approach used was qualitative with data collection techniques through in-depth interviews and documentation studies. The results of the study indicate that AMAN plays a significant role in various aspects, such as legal assistance, mass mobilization, community organizing, legal education, and village deliberations. In addition, AMAN also builds networks with various parties to strengthen the bargaining position of indigenous communities. Through these roles, AMAN has succeeded in increasing the bargaining power of the Pandumaan-Sipituhuta indigenous community in facing the conflict with PT Toba Pulp Lestari. This study confirms that advocacy organizations such as AMAN have a crucial role in fighting for the rights of indigenous communities in land disputes, as well as being agents of change in resolving agrarian conflicts.

Nursani, Adila; Suherman, Anisa Salsabila; Apriliani, Berliana Mawar; Sofyan, Keysa Kailani; Nadiawati, Khansa +2 more

Majelis : Jurnal Hukum Indonesia 2026 Asosiasi Peneliti dan Pengajar Ilmu Hukum Indonesia

Abstract. This study aims to examine the causes, forms, and strategies for combating violence against female Indonesian migrant workers (PMI) from a legal, sociological, and gender perspective. The background of this research is based on the vulnerability of female PMI to various forms of physical, psychological, sexual, and economic violence, which occurs from the pre-placement stage to the post-placement stage, as well as the long-term impact on mental health, human rights, and socio-economic reintegration. The method used is empirical legal with primary data collection through in-depth interviews with female PMI victims of violence and accompanying institutions, as well as secondary data in the form of literature reviews, laws and regulations, and scientific publications. The analysis was conducted using descriptive qualitative methods, integrating human rights theory, Feminist Legal Theory, and international migration policy. The results of the study show that the vulnerability of female migrant workers is caused by economic factors, education, patriarchal culture, non-transparent recruitment processes, the characteristics of work in the informal sector, power imbalances with employers, and weak legal protection in the destination country. The forms of violence experienced include beatings, sexual harassment, threats, social isolation, wage withholding, and structural exploitation practices. Protection efforts implemented include preventive approaches through training, legal education, legal document guarantees, and assistance from law enforcement agencies, as well as repressive approaches through action against perpetrators of violence and bilateral cooperation with destination countries. This study emphasizes the importance of comprehensive and sustainable protection for female Indonesian migrant workers, covering all stages of labor migration as well as strengthening digital-based monitoring systems, officer capacity, and cross-sector collaboration to ensure the safety, dignity, and fulfillment of the human rights of female Indonesian migrant workers.  

Fariza Raisa Rafania; Erna Dewi; Ahmad Irzal Fardiansyah; Maya Shafira; Sri Riski

Jurnal Ilmu Pertahanan, Politik dan Hukum Indonesia 2026 Asosiasi Peneliti dan Pengajar Ilmu Hukum Indonesia

Violence against children remains a serious violation of human rights that continues to occur in various social environments, including religious-based educational institutions such as Islamic boarding schools, where children are in a highly vulnerable position both physically and psychologically. One case that drew public attention occurred at the Pesona Al-Qur’an Islamic Boarding School in Pesawaran Regency, which was resolved through a restorative justice approach without proceeding to court. This study aims to examine the mechanism of law enforcement against perpetrators of child abuse at the institution and to analyze the factors hindering the implementation of restorative justice in such cases. Using a normative-empirical research method, this study analyzes applicable laws and regulations supported by field data obtained through interviews, observations, and documentation. The results show that law enforcement was carried out through an investigation by the Pesawaran Resort Police, followed by the termination of prosecution by the Pesawaran District Prosecutor’s Office based on Regulation of the Attorney General of the Republic of Indonesia Number 15 of 2020 concerning the Termination of Prosecution Based on Restorative Justice. Case resolution was conducted through mediation involving the perpetrator, the victim, and their families, facilitated by law enforcement officers, resulting in an agreement in the form of an apology and compensation to the victim. However, the implementation of restorative justice still faces several obstacles, including limited public understanding, concerns about the loss of deterrent effects, power imbalances between victims and perpetrators, potential pressure on victims to accept reconciliation, and weak supervision of post-mediation agreements; therefore, strengthening oversight, improving the understanding of law enforcement officers and the community, and optimizing the role of child protection institutions are essential to ensure that restorative justice truly prioritizes the best interests of the child and provides substantive justice.

Nur Selinda

Jurnal Riset Ilmu Hukum, Sosial dan Politik 2026 Asosiasi Peneliti dan Pengajar Ilmu Hukum Indonesia

This study aims to analyze Indonesia’s foreign policy in the G20 Bali Leaders’ Declaration of 2022 by mapping national interests to understand the direction and priorities of Indonesian diplomacy amid complex global geopolitical dynamics. Employing a qualitative descriptive-analytical approach and the Rational Choice Theory framework, this research examines how Indonesia, as G20 Presidency, conducted rational calculations between domestic interests and external pressures—particularly regarding the Russia–Ukraine conflict. The findings reveal that Indonesia successfully embedded its national interests into four main dimensions: non-traditional security, strategic economy (energy transition, digitalization, food security), an inclusive global order, and ideological values rooted in the free and active principle. These were effectively integrated into the final declaration. Through an active-inclusive diplomatic strategy including shuttle diplomacy and carefully neutral diplomatic language Indonesia maintained consensus despite deep geopolitical polarization. This demonstrates that Indonesia’s foreign policy during its G20 Presidency was the result of deliberate rational choice, not only addressing global challenges but also reinforcing its role as a credible middle power and bridge-builder. The study contributes theoretically to rationality-based foreign policy analysis and offers practical insights for future Indonesian multilateral diplomacy.

Nurul Karina Ningsih; Asep Purwo Yudi Utomo

Bhinneka: Jurnal Bintang Pendidikan dan Bahasa 2026 Universitas Palan

This research is part of the study of pragmatics, namely illocutionary speech acts. This research focuses on explaining illocutionary speech acts contained in the novel by Nawal El Saadawi entitled Perempuan di Titik Nol. The analysis of speech acts prioritizes language through its actual speakers. Illocutionary speech acts are defined as speech acts that contain intent and function or speech power. In an illocutionary speech act, the utterance gives rise to an action. Illocutionary speech acts are divided into five types, namely assertive, directive, expressive, declarative, and commissive illocutionary speech acts. The data obtained for this research are conversational utterances containing elements of illocutionary speech acts in the novel Perempuan di Titik Nol by Nawal El Saadawi. The research approach uses two methods, namely a pragmatic theoretical approach and a qualitative descriptive methodological approach. In collecting data, the researcher applied the listening method with advanced techniques of free listening and note-taking techniques. Meanwhile, for data analysis, the pragmatic equivalent method was used with formal and informal methods as a form of presentation of the data presented. The research results found 147 utterances containing illocutionary speech acts in this novel.

Maria Merciana Meo; Maria Avrianti Hoar; Maria Angela Un; Maria Renti Seran; Paskalia Gresandi Fatin +2 more

SOSIAL: Jurnal Ilmiah Pendidikan IPS 2026 Asosiasi Peneliti Dan Pengajar Ilmu Sosial Indonesia

This study aims to examine the historical legacy of the Sriwijaya and Majapahit Kingdoms in the context of the development of Southeast Asian civilization through a literature review approach. The study focuses on the contributions of both kingdoms in various aspects, including politics, economy, maritime activities, culture, education, and international diplomacy. Research data were obtained from primary and secondary sources, such as historical manuscripts, inscriptions, archaeological reports, and national and international scholarly publications. The findings indicate that the Sriwijaya Kingdom played a significant role as a major maritime power and an international center of Buddhist education that influenced intellectual networks across Asia. Meanwhile, the Majapahit Kingdom was prominent in developing systems of governance, law, and regional integration of the Nusantara through extensive political and trade networks. Both kingdoms not only shaped the social and cultural structures of their respective periods but also laid an important historical foundation for the formation of identity and regional dynamics in modern Southeast Asia. Therefore, the legacies of Sriwijaya and Majapahit remain highly relevant for understanding historical processes, regional integration, and the long-term development of Southeast Asian civilization.

Ria Permata; Ratna Indrawati; Rina Mutiara

International Journal of Management and Digital Sciences 2026 International Forum of Researchers and Lecturers

There is one problem related with source Power man that is turnover that occurred at Hospital X and is known reach more from 10%. Research aiming for analyze Job Satisfaction as an intervention in connection between compensation compensation, leadership transformational, and burden Work to turnover intention in nurses power Work contract at Hospital X. Research use approach quantitative with type explanatory. Population in study is all over Labor Nurse Contract at Hospital as many as 562 people. The sampling method used is non-probability sampling. Research data This using primary data that is done with share questionnaire in a way direct through google form with alternative answer use scale Likert. Research This use approach Structural Equation Model (SEM) with measurement model using Smart PLS program version 3.2.9. Research results This find that in a way simultaneous all over variable influential to turnover intention. In partial compensation, leadership transformational, and burden Work found own influence significant to Job Satisfaction. More carry on in a way partial satisfaction too work, compensation, leadership transformational, and burden Work own influence significant to turnover intention.

Fadilah Fadilah; Bagus Dwicahyono

Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer 2026 Asosiasi Riset Teknik Elektro dan Informatika Indonesia

PLN (Persero) is the state-owned company responsible for supplying electrical energy in Indonesia and plays a crucial role in ensuring the reliability and continuity of power distribution. Therefore, all electrical equipment, particularly power transformers, must be maintained in safe and reliable operating conditions. Transformers function to change voltage levels from high to low or vice versa and are essential components in the electric power distribution system. One important transformer component that requires periodic maintenance is the On Load Tap Changer (OLTC). To maintain transformer performance and extend its service life, routine maintenance activities such as OLTC oil replacement are necessary. PT. PLN (Persero) ULTG Rangkasbitung conducts regular OLTC oil replacement twice a year as part of its preventive maintenance program. Transformer oil serves as both an insulating medium and a cooling agent; therefore, its condition greatly affects transformer reliability and operational safety. Degraded oil quality can cause insulation failure and reduce transformer efficiency. This study aims to describe the procedure and implementation of On Load Tap Changer oil replacement at the transformer substation of PT. PLN (Persero) ULTG Rangkasbitung. The research method used is field research, carried out through direct observation and interviews with maintenance personnel. The results of this study are expected to provide a clear understanding of the OLTC oil replacement process, support proper maintenance practices, and emphasize the importance of transformer maintenance in ensuring the reliability and sustainability of the electric power system.

Fajar Kartono; Joko Prihartono; Tan Rico Satria

Jurnal Riset Rumpun Ilmu Teknik 2026 Pusat riset dan Inovasi Nasional

The energy that is stored in water can be used to generate electricity by taking advantage of the potential energy available, like the energy from waterfalls and the movement of flowing water. Micro-hydropower plants (PLTMH) are one solution to address the energy crisis, particularly in electricity. VDI 2221 is a method that German engineers use as a guideline when designing construction projects. The VDI (Verein Deutsher Ingeneure or German Engineers Association) design process involves several stages: task description, design concept determination, physical design, and detailed design. Based on the solution principle matrix table, 3 variants were obtained, each of which has criteria. Of the 3 variants that have been evaluated, variant 2 was obtained with results that met the requirements. The cost analysis table shows that the total cost for designing a prototype test equipment for a micro-hydroelectric power plant (PLTMH) based on a laboratory-scale crossflow turbine is Rp 10,032,000. This cost includes instrumentation, control and electrical panels, measuring instruments, pipe instruments, frame and casing, and unforeseen costs.

Alannah Grace Kuhn

Jurnal Riset Rumpun Ilmu Pendidikan 2026 Lembaga Pengembangan Kinerja Dosen

Attention span and cognitive focus in young minds these days are increasingly structured by the growing influence of digital distractions. Drawing from the ideas of Foucault and Nietzsche, this paper examines how technology molds behavior and, at the same time, is used as a tool of control through power relations. This digitally fosters a form of nihilism, the sense life has no purpose. By using a mixed-methods approach, this research combines the surveying and in-depth interviewing of students and instructors about how technology influences attention, learning, and academic performance. Results indicate that while technology brings many benefits, it also provides significant challenges-most notably via social media and smartphone distractions. These distractions reduce attention spans, decrease deep learning, and contribute to cognitive overload. This study therefore calls for the integration of technology into education in a balanced way, highlighting digital literacy, mindful use, and distraction-reduction strategies. In the process, self-awareness, self-regulation, and responsible use will allow people to use its benefits rather than fall into disengagement and cynicism. Technology should serve as a tool for learning and growth-not a barrier to focus and intellectual development.

Panjaya, Kyara Carol

Jurnal Riset Rumpun Ilmu Pendidikan 2026 Lembaga Pengembangan Kinerja Dosen

Vaping is when you inhale a mist through a power based device, filled with flavourings, chemicals, and nicotine (Texas Health and Human Services, nd). Teenagers tend to vape due to external influences such as advertisements and social interactions, which has a significant contribution in the role of gaining societal acceptance of vaping amongst teenagers (CDC, nd). However its use in teenagers is illegal as per the Indonesian Government Regulation Number 109 2012, which restricts individuals below 18 years old from vaping. A study conducted in 2018 has reported that teenagers have started vaping from 2017. Despite rules and regulations, teenagers are still able to access it which makes the law enforcement ineffective that leads to teenagers being able to have access to vapes. This research will investigate the influence of social media and peer pressure on underage vaping, focusing on how contents on social media, their peers along with social interactions shape the perspective and behaviour of a teenager towards vaping. This following topic is important as social media plays a significant role in the normalisation of vaping despite harmful effects. It aims to recognize how social media and interactions among fellow peers influence a teenager. With the use of qualitative and quantitative methods such as surveys and interviews, it will also apply theories from 3 thinkers to have a better understanding of a teenager’s decision.

Bari Candramedi

International Journal of Law, Crime and Justice 2026 Asosiasi Penelitian dan Pengajar Ilmu Hukum Indonesia

The investigation stage constitutes a crucial phase in the criminal justice system, as it determines the direction and quality of subsequent law enforcement processes. Within the context of Indonesian criminal procedural law, the Criminal Procedure Code (Kitab Undang-Undang Hukum Acara Pidana/KUHAP) grants extensive authority to law enforcement officials, particularly investigators, in order to ensure the effective disclosure of criminal offenses. However, such dominance of authority has the potential to create an imbalance between the interest of law enforcement effectiveness and the protection of human rights, especially when it is not accompanied by adequate mechanisms of limitation and oversight. This study aims to critically analyze the dominance of law enforcement authority at the investigation stage and its implications for law enforcement effectiveness and the potential for abuse of power. The research employs normative legal research using statutory and conceptual approaches, supported by qualitative analysis of legal doctrines, legislation, and relevant academic literature. The findings indicate that while the dominance of investigative authority does contribute to the effectiveness of investigations, it simultaneously creates opportunities for abuse of power due to weak internal and external oversight mechanisms. This condition results in the erosion of the principles of due process of law and the protection of suspects’ rights within the criminal justice system. Therefore, this study emphasizes the need to strengthen judicial control mechanisms, enhance the accountability of law enforcement officials, and reform criminal procedural law in order to achieve a balance between effective law enforcement and the protection of human rights within a democratic rule-of-law state.

Latifa Nurul Hidayati; Luqman Hakim; Vivi Pratiwi; Selvi Agustin; Nabila Aulia Sari +3 more

Jurnal Riset Rumpun Ilmu Pendidikan 2026 Lembaga Pengembangan Kinerja Dosen

This study was conducted to review the quality of test items in Business Economics and General Administration subjects using a classical analysis approach. The assessment process included examining validity, reliability, difficulty level, the ability of questions to differentiate student abilities, and the accuracy of distractors. The research approach used was descriptive quantitative, with 32 students from grades XI and XII majoring in Accounting as subjects and 50 multiple-choice questions as instruments. The main focus of this study was to ensure that the evaluation tools used were truly capable of describing students' competency achievements. Data analysis was conducted through observation results and student responses on Google Forms, which were then processed using the Anates Version 4.0 application. The results of the analysis showed that most of the questions had high validity and reliability, good discrimination power, and a moderate level of difficulty. However, the overall quality of the distractors was not good enough, and there were no questions in the difficult category. Overall, the quality of the questions in this subject can be categorized as good and suitable for evaluating the learning of vocational high school students in grades XI and XII.

Yosse Amanda Pratama; Dede Rubai Misbahul Alam; Shonhaji Jaoharul Huda

Akhlak : Jurnal Pendidikan Agama Islam dan Filsafat 2026 Asosiasi Riset Ilmu Pendidikan Agama dan Filsafat Indonesia

The Islamic conception of science views knowledge as a unity originating from Allah SWT and directed towards realizing human welfare. Islamic science does not separate the rational, empirical, and spiritual dimensions, but rather integrates revelation, reason, and sensory experience in obtaining truth. Science from an Islamic perspective is understood as a human effort to read and understand the verses of kauniyah as a manifestation of God's power in the universe. This study aims to analyze the Islamic conception of science and its relationship with science, and examine the urgency of integrating the two in facing the challenges of modern science. The research method applied in this study is a literature study with a qualitative approach, through descriptive and interpretive analysis of various relevant literature sources. The research findings indicate that the integration between Islamic science and science plays a strategic role in overcoming the scientific dichotomy, strengthening the ethical foundation of science, and building a scientific paradigm oriented towards the values ​​of monotheism and humanity. Thus, the Islamic conception of science and science offers an alternative, holistic and sustainable scientific framework.

Rohmatulloh, Desy; Ani Rafika Sari; Mohamad Afrizal

Jurnal Rumpun Ilmu Bahasa dan Pendidikan 2026 Asosiasi Periset Bahasa Sastra Indonesia

Enforced disappearance during the New Order era represents a historical reality that has left profound wounds and prolonged uncertainty for both the victims and the families left behind. This reality is powerfully represented in Laut Bercerita, a novel by Leila S. Chudori, through the use of symbolic and evocative literary language. This study aims to reveal the representation of enforced disappearance through the use of figures of speech and metaphors in the novel. The research employs a descriptive qualitative method with a stylistic approach. The data consist of narrative excerpts containing figures of speech and metaphors related to experiences of loss, suffering, memory, and resistance. Data collection was conducted through intensive reading and systematic note-taking, while data analysis involved classifying types of figures of speech and interpreting their contextual meanings. The findings indicate that metaphors of the sea, silence, darkness, and alienation play a crucial role in constructing the representation of enforced disappearance as a traumatic experience that is not only physical but also psychological and collective in nature. The use of figurative language strengthens the narrative’s expressive power in conveying criticism of state violence while simultaneously preserving the memory of humanitarian tragedies that are often marginalized. This study implies that literary works can function as reflective media and as cultural documentation of histories of violence.

Artyson Firman Poyoh; Emha Rifaq Alhaqi; M. Rayhan Nova Ramadhan

Jurnal Hukum, Administrasi Publik, dan Ilmu Komunikasi 2026 Asosiasi Peneliti dan Pengajar Ilmu Hukum Indonesia

Minister of Culture Fadli Zon's controversial statement, casting doubt on the existence of mass rape in the May 1998 Tragedy, sparked a strong public reaction, particularly from victims and human rights activists. This study aims to analyze Fadli Zon's statement as a form of identity politics in the context of contemporary Indonesian politics. This research uses a descriptive qualitative method with a discourse analysis approach to public statements, media coverage, and official documents such as reports from the National Commission on Violence Against Women and the Joint Fact-Finding Team (TGPF). The results show that Fadli Zon's statement is not merely a personal view, but rather a representation of identity politics that has the potential to obscure historical truth and reinforce social polarization. The identity politics that emerged in this discourse demonstrates how political power can influence the construction of national history and marginalize minority groups, particularly Chinese women victims of sexual violence. This study emphasizes the importance of historical honesty and the moral responsibility of political elites in preserving the nation's collective memory.

Rahman, Novia Salsabila Ayuni; Abdul Basit; Ezza Padmaratri; Firza Agung Prakoso

Jurnal Hukum, Administrasi Publik dan Negara 2026 Asosiasi Peneliti Dan Pengajar Ilmu Sosial Indonesia

This study evaluates the legal perspective concerning business competition in Indonesia regarding alleged abuse of dominant power in the competition between digital platforms TikTok Shop (including the acquisition of Tokopedia) and Shopee. The method applied is normative juridical with a case study approach, referring to Law Number 5 of 1999, particularly Articles 19–21 related to market control and Article 20 concerning below-cost selling practices. The analysis focuses on inter-platform integration, aggressive discount strategies, use of cross-platform data, as well as post-acquisition behavior that may hinder healthy competition. The assessment is conducted by considering market structure, business actors' behavior, and law enforcement efforts by the Business Competition Supervisory Commission (KPPU). Research findings indicate that although TikTok Shop has strong competitiveness following the acquisition, proving the existence of abuse of a dominant position requires meeting legal and economic provisions rigorously. Therefore, the implementation of conditional approval and remedial measures by the KPPU is considered a reasonable step to maintain a healthy business competition environment in the digital era.

Amelya Indah Pratiwi

Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer 2026 Asosiasi Riset Teknik Elektro dan Informatika Indonesia

The increasing need for insulation in electric power systems encourages the discovery of high-performance and sustainable dielectric materials. This study presents a Literature Review of biomass-based composite insulator research from 2018-2025 to synthesize the effect of filler type and treatment on the electrical, thermal, and mechanical properties of polymer composites. Literature was analyzed from reputable databases with inclusion criteria, and thematic analysis data extraction. Processing methods generally include washing, acid/alkali treatment, calcination, and advanced production techniques such as sol-gel and ultrasonication, integration of biomass fillers especially at low fractions (3-7%). The results show 1) the dominance of the use of rice husk as a source of biosilica for the main matrix filler of the insulator. 2) the performance of biomass composite insulators is highly dependent on the quality of purification, particle size, and surface modification of the filler. 3) there is a significant increase in the insulator's breakdown strength, resistivity, and thermal stability with the addition of biomass fillers to the main matrix. 4) the long-term stability of biomass materials against humidity and thermal aging has not been evaluated in depth.  

Muhammad Taufiqurahman; Pebi Riyanto; Rany Puspita D; Raka Mahendra S; Arif Rahman S +1 more

Venus: Jurnal Publikasi Rumpun Ilmu Teknik 2026 Asosiasi Riset Ilmu Teknik Indonesia

Proton Exchange Membrane Fuel Cells (PEMFCs) are increasingly developed due to their high efficiency, power density, durability, and environmental friendliness. However, the high cost of platinum catalysts limits their widespread application. Reducing platinum usage through the development of low-cost catalyst support materials is a promising approach. Activated carbon derived from biomass offers a sustainable and economical alternative, particularly when utilizing agricultural waste such as coffee husks, which are often discarded. This study aims to evaluate the characteristics of activated carbon produced from coffee husk waste through pyrolysis as a catalyst support for PEMFCs. Pyrolysis was conducted at 400 °C, followed by chemical activation using 1 M H₃PO₄ and 1 M KOH with a residence time of 90 minutes. The resulting activated carbon was analyzed through proximate analysis to determine moisture content, ash content, volatile matter, and fixed carbon content. The results showed that activation with 1 M H₃PO₄ produced the lowest moisture content (3.4%), the lowest ash content (3.8%), and the highest fixed carbon content (60.5%), while 1 M KOH yielded the lowest volatile matter content (27.7%). Based on these results, activated carbon produced using H₃PO₄ meets the requirements of SNI No. 01/6235/2000 and demonstrates strong potential as a catalyst support material for PEMFC applications.