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Set theory is one of the fundamental concepts underlying the structure of discrete mathematics and computer science and plays a crucial role in understanding various advanced topics, such as relations, functions, mathematical logic, and other discrete structures. This concept serves as the foundation for developing a systematic and structured mathematical mindset. This paper aims to explain the fundamental concepts of set theory, review its significance in discrete mathematics, and outline how to present sets and basic operations on sets, such as union, intersection, complement, and difference. The method used in this paper is a literature study by reviewing, collecting, reading, and analyzing data from various relevant written sources, both textbooks and scientific articles. Through this study, students are expected to be able to understand set theory more comprehensively. Thus, it can be concluded that set theory is not merely an introductory topic, but rather a formal framework that defines the validity of logic and structure in modern discrete systems.  

Postoperative pain is a common clinical condition experienced by patients after surgical procedures and may hinder the recovery process if not properly managed. In addition to pharmacological therapy, safe and effective non-pharmacological interventions are needed, one of which is early mobilization. This study aimed to analyze the effect of early mobilization on pain reduction in postoperative surgical patients. A scoping review method was conducted based on the Arksey and O’Malley framework. Literature searches were performed using ScienceDirect, PubMed, and Google Scholar databases with a PICO strategy, including articles published within the last five years. From a total of 167,948 identified articles, 10 studies met the inclusion criteria and were included in the analysis. The results showed that early mobilization performed gradually and according to patients’ clinical conditions had a significant effect on reducing postoperative pain intensity. In addition, early mobilization was associated with improved comfort, enhanced functional recovery, and faster postoperative rehabilitation without increasing the risk of complications. Although variations were found in the timing and type of mobilization across studies, overall evidence supports that early mobilization is safe and effective. In conclusion, early mobilization can be recommended as an evidence-based nursing intervention for postoperative pain management.

The Criminal Procedure Code (KUHAP) regulates three types of decisions that may be rendered by judges in criminal proceedings. A legal issue arises in situations where a defendant is proven guilty lawfully and convincingly, yet the imposition of a criminal punishment would create a conflict between legal certainty and legal justice. Article 54 paragraph (2) of Law Number 1 of 2023 concerning the Criminal Code (KUHP) introduces a new principle known as Rechtelijk Pardon, or what is referred to as a judicial pardon ruling. This provision offers guidelines for sentencing by considering various factors related to justice and humanity. Following the reform of the Criminal Code through the inclusion of this provision, there emerges a need to reform the Criminal Procedure Code as well, specifically by incorporating the judicial pardon decision into Article 191 of KUHAP. This research employs a normative legal research method using primary and secondary data sources. The research approach utilizes statutory and conceptual approaches. The results of the study emphasize the importance of adding the judicial pardon decision to Article 191 of KUHAP so that the reform of criminal law in Indonesia maintains coherence between substantive and procedural legal reforms, thereby creating a criminal justice system that is more just, humane, and responsive to societal needs.

This study aims to examine and compare various findings from previous research on the effectiveness of online learning among university students in higher education settings in order to obtain a comprehensive general conclusion. The research method employed is a literature review using a content analysis approach of scholarly publications published between 2019 and 2025. The data sources include relevant national and international journal articles focusing on online learning in higher education. The results of the review indicate that the effectiveness of online learning is influenced by three interrelated main factors. Psychological factors include learning motivation, students’ perceptions of online learning, and the emotional conditions experienced during the learning process. Pedagogical factors encompass lecturers’ creativity in designing learning activities, the selection of appropriate teaching methods, and the use of interactive and varied learning media. Meanwhile, technical or environmental factors include the availability and ease of access to learning platforms, the quality of internet connectivity, and supportive learning environments. Online learning offers several positive impacts, such as flexibility in learning time, cost efficiency, and enhanced student experience in utilizing digital technology. However, it also has the potential to generate negative effects, including boredom, stress, and difficulties in understanding course material when technical barriers are not resolved and learning activities are monotonous. Therefore, optimal management of psychological, pedagogical, and technical factors is essential to improve the effectiveness of online learning for university students.

Exposure to cigarette smoke is one of the environmental risk factors that is still widely found and has a significant impact on the health of the respiratory system, especially the upper respiratory tract. The irritants and toxic substances in cigarette smoke can trigger mucosal inflammation, interfere with the defenses of the airways, and increase susceptibility to various upper airway disorders. This study aims to systematically analyze the relationship between cigarette smoke exposure and upper airway disorders based on available scientific evidence. The method used is Systematic Literature Review (SLR) with reference to the PRISMA 2020 guidelines. Literature searches were conducted through PubMed, ScienceDirect, Google Scholar, and Garuda databases. Articles were selected based on inclusion and exclusion criteria, resulting in 26 articles that were analyzed narrative-synthesis. The results showed that most studies reported a meaningful association between exposure to cigarette smoke, both in active and passive smokers, and an increased risk of upper respiratory tract disorders such as rhinitis, sinusitis, recurrent upper respiratory tract infections, pharyngitis, and laryngitis. Higher risks are found in passive smokers, especially children, as well as in individuals with long-term, high-intensity exposure. The conclusion of this study confirms that exposure to cigarette smoke is an important and preventable risk factor for upper respiratory tract disorders. Therefore, it is necessary to strengthen the policy of non-smoking areas, public education, as well as promotive and preventive efforts in health services to reduce the impact of exposure to cigarette smoke on the health of the upper respiratory tract.

Premarital sexual behavior in adolescents is a public health issue influenced by various individual, social, and environmental factors. Changes in social norms, technological advancements, and limited reproductive health knowledge make adolescents a group vulnerable to risky sexual behavior. This study aims to examine the factors influencing premarital sexual behavior among adolescents based on the Health Belief Model (HBM) approach. The method used is a Systematic Literature Review (SLR), review national and international scientific articles published between 2013 and 2025. Data sources were abtained from Google Scholar and ScienceDirect, with inclusion criteria including articles in Indonesia and English, open access, full text, and relevant to HBM components. The study result indicate that factors such as perceived barriers, self-efficacy, and the quality of information play an important role in shaping adolescent sexual behavior. Low knowledge and limited perception oh the negative impacts of premarital sex increase the risk of engaging in risky sexual behavior. In addition, health promotion interventions based on the Health Belief Model (HBM) have been proven effective in improving knowledge, attitudes, and preventive behaviors regarding premarital sex among adolescents. Therefore, the HBM approach is recommended as a basis for developing comprehensive and sustainable adolescent reproductive health education and promotion programs.

Papaya fruit (Carica papaya L.) is a tropical plant widely consumed as food and known to contain various bioactive metabolites with potential health benefits. The increasing interest in natural products as functional resources highlights the importance of reviewing the chemical characterization and health applications of papaya bioactive compounds. This article aims to systematically review the types of bioactive metabolites found in papaya fruit, the chemical characterization methods applied, and their potential applications in the health sector. This review was conducted through a literature study of relevant scientific articles, focusing on metabolite identification and biological activity evaluation. The results indicate that papaya fruit contains diverse bioactive metabolites, including flavonoids, phenolic compounds, alkaloids, saponins, terpenoids, and proteolytic enzymes. These compounds are commonly characterized using chromatographic and spectroscopic techniques. Several studies have reported that papaya bioactive metabolites exhibit biological activities such as antioxidant, antimicrobial, anti-inflammatory, and antidiabetic effects. This review suggests that papaya fruit has promising potential as a functional natural resource for health and pharmaceutical applications.

Article 28H paragraph (1) of the 1945 Constitution of the Republic of Indonesia guarantees the right of every person to live in a good and healthy environment, while Article 33 paragraph (4) of the 1945 Constitution of the Republic of Indonesia affirms the principle of sustainable and environmentally friendly development as the basis for natural resource management. These constitutional norms are implemented through Law No. 32 of 2009 concerning Environmental Protection and Management, which requires every business activity to prevent any pollution and/or environmental damage. In addition, through Law Number 11 of 2020 concerning Job Creation as amended by Law Number 6 of 2023, there have been significant changes in the business licensing system and environmental protection instruments, including the integration of environmental approval into risk-based business licensing as regulated in Articles 22 and 23. In the context of oil palm plantations in Sumatra, these changes in norms have legal implications for the fulfillment of business actors' legal obligations in environmental protection and management. This study aims to analyze the impact of oil palm plantation exploitation in Sumatra from an environmental law perspective, particularly in relation to legal violations based on the normative framework of applicable laws and regulations after the enactment of the Job Creation Law.

This study aims to analyze in depth the quality of Early Childhood Education (ECE) teachers in the learning process at schools and its implications for early childhood development. The quality of educators is viewed as one of the key factors determining the success of learning implementation and the achievement of educational objectives at the early childhood education level. This study employs a literature review method, which involves collecting various relevant scientific articles, books, and other academic sources related to the research topic, followed by systematic analysis to obtain a comprehensive understanding and conclude the findings. The results indicate that the quality of educators has a significant influence on teachers’ success in performing their roles as facilitators, mentors, and educators in supporting children’s cognitive, social, emotional, and motor development. Therefore, the quality of early childhood educators needs to be continuously developed and improved through education, training, and professional development to maintain and enhance the quality of learning activities in schools. In addition, support from various stakeholders, including the government, educational institutions, schools, and parents, plays a crucial role in efforts to improve the quality of early childhood educators in an optimal and sustainable manner.

Temulawak (Curcuma xanthorrhiza Roxb.) is an indigenous medicinal plant of Indonesia that has been widely used in traditional medicine and shows considerable potential in the health and pharmaceutical fields. This potential is related to its diverse secondary metabolites with bioactive properties. This review article aims to examine the phytochemical profile of temulawak, the analytical methods used to identify bioactive compounds, and their reported biological activities based on literature studies. The method applied was a literature review of scientific articles discussing the chemical composition and biological activities of temulawak. The results indicate that temulawak contains major compounds such as curcuminoids, xanthorrhizol, flavonoids, phenolic compounds, and essential oils, which are commonly identified using chromatographic and spectroscopic techniques. Several studies report that temulawak exhibits antioxidant, anti-inflammatory, antibacterial, hepatoprotective, and potential anticancer activities. These findings indicate that temulawak has significant potential as a source of natural bioactive compounds. In conclusion, temulawak possesses a rich phytochemical profile and promising biological activities, supporting its potential application in the development of natural-based health and pharmaceutical products.

This study aims to explore the concept of reconciliation in Christian theology as a philosophical foundation for an alternative criminal justice model involving the LGBT community. The retributive criminal law approach is often considered ineffective in addressing the complexities of legal, social, and religious conflicts related to religious sexual minorities. Using a qualitative method and a constructivist approach, this study analyzes the meaning of reconciliation through sacred texts, doctrine, and interviews with theologians, legal practitioners, and the Christian LGBT community. This approach reveals the subjective understanding of the actors regarding reconciliation and justice. The findings show that the core of reconciliation theology is the restoration of relationships, recognition, and transformation, which can form an ethical framework for the restorative justice model. This model offers a holistic solution, not only addressing legal consequences but also restoring social harmony by respecting individuals' dual identities. The article concludes that the integration of theological insights can lead to a more inclusive and transformative criminal justice paradigm for the LGBT community, resulting in a more humane and just resolution.

Tuberculosis (TB) remains a major global public health problem and is one of the leading causes of death after HIV/AIDS. This disease has a high transmission rate, especially among children. This study aims to identify and analyze the determinants contributing to the incidence of tuberculosis in children based on previous studies. The method used was a literature review, which analyzed scientific articles related to the determinants of TB in children. Articles were searched through databases such as Google Scholar, Crossref, and Sinta using related keywords. Of the five articles that met the inclusion criteria, it was found that a history of contact with an adult TB patient was the main factor in transmission in children. Children are highly susceptible to contracting TB germs transmitted through droplets from coughing or talking. In addition, BCG immunization can provide protection against TB infection in children by developing antibodies. A scoring system was used to examine the history of contact in children at risk. In conclusion, there is a significant relationship between history of contact and the incidence of TB in children. Therefore, it is important for adult TB sufferers who live with children to practice preventive behaviors, such as cough etiquette, wearing masks, and proper phlegm disposal.

Drug abuse is a serious global public health problem, with the prevalence in Indonesia reaching 1.73% or about 3.33 million people in 2023, mainly among those aged 15–24 years. Understanding the psychological determinants of this behavior is crucial to enhance prevention and rehabilitation efforts. Objective: To analyze determinants of drug abuse behavior based on the Health Belief Model (HBM) through a literature review of studies published between 2015 and 2025. Methods: A literature review of 8 academic articles from Google Scholar and PubMed, limited to open‑access Indonesian- and English‑language journals examining HBM constructs related to drug abuse and rehabilitation participation. Results: HBM variables were generally associated with drug abuse behavior and rehabilitation adherence, with self‑efficacy emerging as the most consistent determinant, followed by perceived susceptibility and perceived severity. Perceived barriers, especially complex administrative procedures, distance, costs, and stigma, were identified as major obstacles to engaging in rehabilitation. Conclusion: The HBM is useful for mapping determinants of drug abuse behavior and highlights the need to strengthen self‑efficacy, risk perceptions, and barrier reduction within health promotion and community‑based rehabilitation programs.

Sharia-compliant investment in Indonesia has experienced rapid growth, in line with increasing public interest in instruments compliant with Islamic principles. However, market fluctuations remain a major challenge in maintaining the performance of sharia investments, particularly sharia mutual funds. This article analyzes the dynamics of sharia investment in Indonesia in the face of market volatility, focusing on the performance of sharia mutual funds. The research method used is a quantitative approach, with secondary data analysis from various scientific studies and recent statistical data. The results indicate that macroeconomic fluctuations and market conditions significantly influence the performance of sharia mutual funds. Nevertheless, sharia mutual funds continue to demonstrate resilience and certain advantages compared to conventional mutual funds, particularly in the face of market uncertainty. These findings have important implications for sharia investors, investment managers, and policymakers in designing more optimal investment strategies and strengthening the position of sharia mutual funds in an increasingly dynamic market.

The Industrial Revolution 4.0 has significantly transformed the education sector, including Islamic education. Digital transformation requires Islamic education to adapt while maintaining Islamic values as the foundation of learning. Islamic education faces challenges such as limited digital competence among educators, unequal technological infrastructure, and curricula that are not yet responsive to digital demands. Therefore, examining Islamic education in this era is essential. This study aims to analyze the role of Islamic education in the Industrial Revolution 4.0, identify challenges and opportunities in digital adaptation, and explore development strategies integrating Islamic values with digital technology. This study employs a literature review method by analyzing relevant national and international journal articles published within the last five years. The findings indicate that Islamic education plays a crucial role in strengthening moral values and character amid rapid technological advancement, while digital integration offers opportunities for adaptive and competitive learning development.

This study aims to examine the relationship between reading interest and students' speaking skills at the elementary school level using a literature review approach. The background of this study focuses on the importance of reading interest as an element of speaking skills that need to be honed from an early age, and there is a strong assumption that reading interest has a major influence in improving these skills. The method applied is an analysis of five scientific articles found through a search using the keywords "speaking skills", "vocabulary", and "reading interest" on Google Scholar. The results of the study showed that all studies analyzed concluded that there was a significant and positive relationship between reading interest and speaking skills. Students who have a high interest in reading generally show better speaking skills thanks to their rich vocabulary, good sentence structure, and the ability to convey ideas regularly. These findings have important implications for teachers, curriculum developers, and parents to combine reading activities with speaking activities in the educational process. Increasing literacy culture from an early age has been shown to support the development of students' oral communication skills more effectively and sustainably.

This article examines the integration of constructivist theory in Christian Religious Education (PAK) by emphasizing the role of personal experience as the basis for faith formation. Through a reflective-theological qualitative approach, this research combines the constructivist thought of Piaget, Vygotsky, and Fosnot with a theological perspective on the incarnation of Christ and the work of the Holy Spirit. The analysis suggests that constructivism can be theologically reinterpreted into a new paradigm called the Theo-Constructive Epistemology of Incarnational Faith, in which faith is not simply taught cognitively, but is constructed through life experiences infused by the presence of God. This approach emphasizes that the learning of faith is relational, participatory, and contextual, in line with the nature of God who works in human history. The findings of this study offer a new direction for PAK praxis to be more relevant to digital contexts and cultural plurality, without losing its theocentric orientation. Thus, the integration of constructivism and incarnational theology opens up space for more dynamic, contextual, and transformative learning of faith, while strengthening the relevance of PAK in facing the challenges of modern times.

The development of information technology encourages organizations to adopt a more efficient, flexible, and secure data management system, especially in the field of financial management that requires high accuracy and reliability. One of the technologies that is widely used is cloud computing, which offers easy access to data and an integrated security system. This article aims to analyze the utilization of cloud technology in improving the security and accessibility of financial management data. The method used in this study is a literature study by examining various scientific sources, books, and online news relevant to the topic of cloud computing and financial data management. The results of the study show that cloud technology is able to improve data security through the implementation of encryption, multi-layered access control, user authentication, and a reliable data backup system. In addition, cloud technology also improves the accessibility of financial data because it allows users to access information in real-time, flexibly, and without location or device restrictions. Thus, the application of cloud technology can be a strategic solution for organizations in improving operational efficiency, data security, and the quality of decision-making in financial management.

This article aims to describe the teaching methods and practices of the Philosophy of Islamic Education course at STAI Darussalam. This research uses a qualitative descriptive approach with a field study method that focuses on the learning process, the competencies to be achieved, teaching methods, assignment formats, evaluation systems, and obstacles encountered during the course. Data were obtained through observation and information gathering related to the implementation of the Philosophy of Islamic Education course. The results show that the teaching of the Philosophy of Islamic Education at STAI Darussalam focuses on understanding the nature of Islamic education, developing students' critical thinking patterns, improving educational literacy, and linking philosophical studies to social and political realities. The lecture method remains the dominant method used by lecturers, with an emphasis on students' ability to define and explain basic philosophical concepts accurately as an indicator of understanding. Learning success is measured by changes in students' thinking, which becomes increasingly critical, reflective, and contextual in responding to educational issues and social justice issues.

The Local Currency Settlement (LCS) initiative is a strategic instrument to promote ASEAN regional financial integration while reducing dependence on the US dollar in trade and investment transactions. Sub-regional cooperation between Indonesia, Malaysia, and Thailand has become an important policy arena to test the effectiveness of LCS as part of the implementation of the ASEAN Economic Community (AEC) Blueprint 2025. This article aims to analyze the role, opportunities, and challenges of LCS implementation within the framework of ASEAN financial integration, focusing on the dynamics of cooperation between the three countries. The research uses a qualitative approach through literature review and policy analysis. Data were obtained from official central bank documents, regional cooperation agreements, international agency reports, and academic literature related to financial integration and regional monetary cooperation. The analysis was conducted descriptively and analytically to identify implementation patterns, structural barriers, and policy implications. The results of the study indicate that LCS contributes to increasing the efficiency of cross-border transactions, reducing exchange rate risk, and strengthening sub-regional ASEAN financial cooperation. However, its implementation remains limited due to differences in financial infrastructure readiness, variations in domestic regulations, and low adoption by business actors. This article emphasizes the importance of policy coordination, regulatory harmonization, and private sector involvement to optimize the role of the LCS in supporting ASEAN financial integration.