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This study aims to critically analyze bioethanol production from water hyacinth (Eichhornia crassipes) based on previous research findings and to develop a project-based learning design for SMA/SMK students. This study employs a qualitative approach using a literature review method by analyzing relevant scientific articles published in the last five years. Data were collected through documentation and analyzed using descriptive qualitative techniques, including data reduction, data display, and conclusion drawing. The findings indicate that bioethanol production efficiency is strongly influenced by pretreatment methods, fermentation conditions, and process control, with yields generally categorized as low to moderate. Previous studies also reveal that project-based learning significantly enhances students’ conceptual understanding and critical thinking skills. Based on the synthesis of these findings, this study proposes a structured project-based learning design that integrates bioethanol production as a contextual learning medium. The implications of this study emphasize the importance of aligning technical feasibility, educational objectives, and sustainability principles in developing science-based learning projects in secondary education.

This study aims to analyze the role of Aviation Security (AVSEC) and Air Traffic Control (ATC) in maintaining flight safety and security at Frans Seda Maumere Airport and relate it to Operational Management theory. The method used is a qualitative approach through interviews with sources directly involved in airport operations. The results of the study show that AVSEC acts as the first line of defense in the aviation security system through passenger, baggage, and cargo checks (SCP1 and SCP2), as well as surveillance of restricted areas (airside). Meanwhile, ATC is responsible for regulating aircraft traffic in the air and on the ground to ensure smooth and safe flights. The collaboration between AVSEC and ATC can be categorized as a form of integrated operational management, which is the integrated operational management between different units with a common goal, namely to ensure optimal aviation security and safety. Thus, the implementation of structured and integrated operational management is key in supporting the continuity of safe, orderly, and efficient flight operations.

This study aimsmto examineiin depthvthe perspective of information technology law and human rights on the phenomenon of political buzzers on social media within the context of digital development in the era of globalization. This research is motivated by the rapid advancement of information technology, which has brought significant changes in various aspects of society, including the political sphere that increasingly utilizes social media as a means of communication and information dissemination. The phenomenon of political buzzers has become a controversial issue, particularly during election periods, as it is often associated with the spread of inaccurate information, defamation, hate speech, and the manipulation of public opinion that may harm society and disrupt social stability. This study employs a normative legal research method using statutory and conceptual approaches. The results indicate that political buzzers generally operate under the justification of freedom of expression as part of human rights. However, such freedom is not absolute and must be limited to prevent violations of others' rights and to maintain public order. In this regard, information technology law in Indonesia, particularly through regulations governing digital activities, plays an important role in controlling deviant buzzer practices. Nevertheless, the absence of specific regulations explicitly governing political buzzers has resulted in less optimal law enforcement. Therefore, strengthening regulations and increasing public awareness in the wise use of social media are necessary to create a healthy, responsible, and sustainable digital ecosystem.

This study describes the fluctuating exports and imports over the past five years, from 2020 to 2024, which also influenced fluctuations in Indonesia's foreign exchange reserves. The purpose of this study is to determine the effect of exports and imports on Indonesia's foreign exchange reserves from 2020 to 2024. The research method is quantitative using secondary data obtained from the Indonesian Central Bureau of Statistics. The population in this study was 5 years from 2020 to 2024. Data analysis used classical assumption tests consisting of normality tests, multicollinearity tests, and heteroscedasticity tests. In addition, hypothesis tests were also used, consisting of partial tests, simultaneous tests, and coefficient of determination tests. The results of this study indicate that the export variable has a negative effect on Indonesia's foreign exchange reserves from 2020 to 2024. The import variable has a positive effect on Indonesia's foreign exchange reserves from 2020 to 2024. Export and import variables do not simultaneously affect Indonesia's foreign exchange reserves from 2020 to 2024. The implication of this research is that the government needs to manage export and import policies more effectively, as they do not always have the theoretical impact on foreign exchange reserves. Improvements in export quality and import controls are needed, as well as consideration of other factors such as foreign investment and economic policies to maintain the stability of foreign exchange reserves.

Laparotomy is a major surgical procedure associated with a high risk of acute postoperative pain. According to Gan (2017), if pain is not properly managed, it can progress to chronic pain. (Toro et al., 2018) reported that severe pain on the first postoperative day is still commonly found in laparotomy patients, while (Small & Laycock, 2020) indicated that moderate to severe pain within the first 24 hours following major surgery remains a significant clinical issue. This study aims to evaluate the effectiveness of pharmacological pain management following laparotomy under general anesthesia, specifically to identify the types of opioid analgesics used, analyze their effectiveness in reducing pain intensity, identify side effects, and examine administration techniques and routes. This study employed a Systematic Literature Review (SLR) method following the PRISMA guidelines. Literature searches were conducted in the PubMed, ScienceDirect, and SpringerLink databases covering the years 2015–2026. The included studies comprised randomized controlled trials (RCTs), cohort studies, and retrospective studies addressing opioid pharmacological pain management in adult patients following laparotomy under general anesthesia. Study quality assessment was performed using the Joanna Briggs Institute (JBI) instrument. A total of 11 studies met the inclusion criteria. The results of the systematic literature review indicate that opioids are effective in reducing postoperative pain following laparotomy under general anesthesia. The most commonly used opioids are morphine, fentanyl, and oxycodone. Of all the opioids reviewed, oxycodone provided the best pain control, while intrathecal morphine was most effective in reducing the need for supplemental opioids during the early postoperative period. Other opioids, such as extended-release dinalbuphine sebacate and tegileridine, are also effective, but the number of studies is still limited. The most common side effects are nausea, vomiting, pruritus, sedation, and dizziness. Pharmacological pain management using opioids is effective in reducing the intensity of postoperative pain following laparotomy under general anesthesia. Morphine, fentanyl, and oxycodone are the most commonly used opioids. Oxycodone and intrathecal morphine have shown good results in improving pain control and reducing the need for supplemental opioids. The selection of opioid type, dosage, and administration technique must be tailored to the patient’s clinical condition to achieve optimal analgesia with minimal side effects.

The development of social media in the digital era has significantly changed children’s social interaction patterns. Besides providing benefits such as easier access to information and opportunities for creativity, social media also brings negative impacts on children’s psychological, social, and moral development. This study aims to analyze the restriction of social media use among children from the perspective of Jürgen Habermas, especially regarding the concepts of the public sphere, communicative rationality, and the colonization of the lifeworld. This research uses a literature study method with a qualitative descriptive approach through the collection and analysis of relevant scientific articles. Data validity was strengthened through inclusion and exclusion criteria as well as source triangulation. The findings indicate that social media use among children has an ambivalent impact. Positive effects can emerge when there is strong parental supervision, while weak supervision increases the risk of exposure to harmful content, psychological problems, and reduced quality of social interaction. Restricting social media use through time regulation, content control, and digital education is considered important for protecting children’s development. From Habermas’s perspective, children are vulnerable in the digital public sphere because of their limited communicative rationality. Therefore, restrictions are viewed as efforts to protect children’s values and rationality from distortion by the digital media system.

Industrial hygiene management plays a critical role in protecting worker health by controlling exposure to hazardous factors in the workplace. However, many work environments still show suboptimal implementation, leading to increased risks of occupational diseases. This study aims to analyze the implementation of industrial hygiene management systems in improving worker health based on a literature review approach. The method used is a literature review by collecting and analyzing scientific articles from national databases published between 2021 and 2026. A total of ten relevant articles were selected through a systematic screening process based on predefined inclusion criteria. The findings indicate that workplace hazards such as physical, chemical, and ergonomic factors are significantly associated with various health problems, including respiratory disorders, musculoskeletal issues, and work-related fatigue. The implementation of industrial hygiene management systems, including hazard identification, risk control measures, use of personal protective equipment, and environmental monitoring, has been shown to reduce health risks among workers. However, the effectiveness of implementation is influenced by factors such as worker compliance, management commitment, and availability of facilities. These results highlight the importance of a comprehensive and systematic approach to industrial hygiene in maintaining worker health and preventing occupational diseases. Therefore, strengthening the implementation of industrial hygiene management systems is essential to create a safe and healthy working environment and to support sustainable occupational health practices.

The consumption of sugar-sweetened beverages (SSBs) in Indonesia continues to increase and is associated with the risk of obesity, diabetes, and cardiovascular diseases due to oxidative stress. Kombucha has potential as a functional antioxidant beverage; however, its use is still dominated by Camellia sinensis, limiting the utilization of local ingredients. Bilimbi leaves (Averrhoa bilimbi Linn.) have high antioxidant activity and potential as an alternative substrate. This study aimed to analyze the effect of fermentation time variations (4, 7, and 14 days) and sugar concentrations (10% and 15%) on the acceptability and antioxidant activity of bilimbi leaf kombucha, as well as to determine the best formulation. The study used a true experimental design with a Completely Randomized Design (CRD) involving six formulations (F1–F6) and one control (F0). Antioxidant activity was analyzed using the DPPH method. The results showed that fermentation time and sugar concentration significantly affected antioxidant activity.). The highest antioxidant activity was found in F2 (IC50 98.67 ppm, strong category). F2 was determined as the best formulation due to its  antioxidant activity. F2 has the potential to be developed as an alternative functional beverage to reduce SSB consumption. Further research is recommended to conduct stability testing and in vivo studies.

Contract law recognizes the concept of force majeure as a mechanism to address extraordinary circumstances that hinder the performance of obligations, namely unforeseen events beyond the debtor’s control that may result in the release or suspension of obligations. However, this concept has limitations, as it does not encompass situations such as economic or monetary crises. In the development of international contract law, the UNIDROIT Principles of International Commercial Contracts 2016 (UPICC) introduce the concept of hardship as a response to fundamental changes in circumstances that affect the economic equilibrium of the parties. Although hardship has not been explicitly recognized in Indonesian law, it is considered more relevant for addressing such conditions.This study aims to examine the historical development of the concept of hardship and to analyze the implementation of its underlying values in Indonesian legal practice. The method employed is normative legal research, utilizing primary, secondary, and tertiary legal materials. The findings indicate that, despite the absence of explicit regulation within the national legal system, the values of hardship have been reflected in several court decisions through approaches grounded in fairness and contractual adjustment.The implication of this study is that the concept of hardship has the potential to be explicitly adopted into Indonesian contract law in order to fill existing legal gaps and provide a more adaptive solution to changing circumstances, particularly in addressing economic or monetary crises that fall outside the scope of the force majeure regime

The consumption of sugar-sweetened beverages (SSBs) in Indonesia continues to increase and is associated with the risk of obesity, diabetes, and cardiovascular diseases due to oxidative stress. Kombucha has potential as a functional antioxidant beverage; however, its use is still dominated by Camellia sinensis, limiting the utilization of local ingredients. Bilimbi leaves (Averrhoa bilimbi Linn.) have high antioxidant activity and potential as an alternative substrate. This study aimed to analyze the effect of fermentation time variations (4, 7, and 14 days) and sugar concentrations (10% and 15%) on the acceptability and antioxidant activity of bilimbi leaf kombucha, as well as to determine the best formulation. The study used a true experimental design with a Completely Randomized Design (CRD) involving six formulations (F1–F6) and one control (F0). Antioxidant activity was analyzed using the DPPH method. The results showed that fermentation time and sugar concentration significantly affected antioxidant activity.). The highest antioxidant activity was found in F2 (IC50 98.67 ppm, strong category). F2 was determined as the best formulation due to its  antioxidant activity. F2 has the potential to be developed as an alternative functional beverage to reduce SSB consumption. Further research is recommended to conduct stability testing and in vivo studies.

Dengue Hemorrhagic Fever (DHF) remains a significant public health problem in tropical countries, including Indonesia. The presence of Aedes aegypti larvae is an important indicator of dengue transmission risk and is influenced by environmental factors, particularly temperature and humidity. This study aimed to analyze the relationship between temperature and humidity and the presence of mosquito larvae in Meteseh Village, Tembalang District, Semarang City. This analytical observational study employed a cross-sectional design involving 100 households selected through quota sampling. Data were collected through direct observation and measurement of temperature and humidity using a thermo-hygrometer, then analyzed using the Chi-square test. The results showed a significant association between temperature and the presence of mosquito larvae (p=0.000), while humidity was not significantly associated with larvae presence (p>0.05). Temperature was identified as a more influential environmental factor in supporting mosquito larvae existence than humidity in the study area. These findings highlight the importance of environmental-based vector control strategies, particularly through management of microhabitat temperature conditions, to support dengue prevention.

Dengue Hemorrhagic Fever (DHF) remains a significant public health problem in tropical countries, including Indonesia. The presence of Aedes aegypti larvae is an important indicator of dengue transmission risk and is influenced by environmental factors, particularly temperature and humidity. This study aimed to analyze the relationship between temperature and humidity and the presence of mosquito larvae in Meteseh Village, Tembalang District, Semarang City. This analytical observational study employed a cross-sectional design involving 100 households selected through quota sampling. Data were collected through direct observation and measurement of temperature and humidity using a thermo-hygrometer, then analyzed using the Chi-square test. The results showed a significant association between temperature and the presence of mosquito larvae (p=0.000), while humidity was not significantly associated with larvae presence (p>0.05). Temperature was identified as a more influential environmental factor in supporting mosquito larvae existence than humidity in the study area. These findings highlight the importance of environmental-based vector control strategies, particularly through management of microhabitat temperature conditions, to support dengue prevention.

Anxiety disorders are common mental health problems among adolescents, particularly high school students who face academic demands, social pressure, and emotional changes. Family support, sleep quality, and academic stress are considered factors related to students’ anxiety levels. This study aimed to examine the relationship between family support, sleep quality, academic stress, and anxiety disorders among students of SMAN 1 Sumbawa Besar. An analytical study with a cross-sectional design was conducted involving 114 students selected through stratified random sampling. Data were collected using the Perceived Social Support–Family (PSS-Fa), Pittsburgh Sleep Quality Index (PSQI), Educational Stress Scale for Adolescence (ESSA), and Depression Anxiety Stress Scale (DASS-42). Bivariate analysis was performed using the chi-square test, while multivariate analysis employed binary logistic regression. Bivariate results indicated significant associations between family support, sleep quality, academic stress, and anxiety disorders (p < 0.05). However, multivariate analysis revealed that only family support and sleep quality were significantly associated with anxiety disorders, while academic stress was not significant after controlling for other variables. These findings suggest that anxiety prevention efforts should prioritize strengthening family support and improving sleep quality, alongside academic stress management within the school environment.

Chronic kidney disease is one of the global health problems that requires long-term therapy, one of which is through hemodialysis. According to the World Health Organization (WHO), adherence to treatment and diet is a key factor in improving the quality of life for patients with chronic diseases. An appropriate diet plays an important role in controlling electrolyte levels, fluids, and toxic substances in the body. This study aims to describe the knowledge and dietary compliance of patients undergoing hemodialysis at Santa Elisabeth Hospital Medan in 2025.This research used a descriptive quantitative design with a cross-sectional approach. The sample consisted of 36 patients selected using purposive sampling techniques. The research instrument was a questionnaire developed based on dietary guidelines for hemodialysis patients according to WHO and the Indonesian Ministry of Health standards. The results showed that among the 36 hemodialysis patients, 15 respondents (41.7%) had a good level of knowledge, 14 respondents (38.9%) had a moderate level, and 7 respondents (19.4%) had a low level of knowledge. Regarding dietary compliance, 13 respondents (36.1%) were compliant, 18 respondents (50.0%) were moderately compliant, and 3 respondents (13.9%) were non-compliant. There was a tendency showing that higher knowledge levels were positively correlated with better dietary compliance, in line with WHO’s principle that health education is an essential intervention in managing chronic diseases. This study recommends strengthening ongoing educational programs by healthcare professionals, particularly in delivering accurate and easy-to-understand information about diet management for hemodialysis patients.

Chronic kidney disease is one of the global health problems that requires long-term therapy, one of which is through hemodialysis. According to the World Health Organization (WHO), adherence to treatment and diet is a key factor in improving the quality of life for patients with chronic diseases. An appropriate diet plays an important role in controlling electrolyte levels, fluids, and toxic substances in the body. This study aims to describe the knowledge and dietary compliance of patients undergoing hemodialysis at Santa Elisabeth Hospital Medan in 2025.This research used a descriptive quantitative design with a cross-sectional approach. The sample consisted of 36 patients selected using purposive sampling techniques. The research instrument was a questionnaire developed based on dietary guidelines for hemodialysis patients according to WHO and the Indonesian Ministry of Health standards. The results showed that among the 36 hemodialysis patients, 15 respondents (41.7%) had a good level of knowledge, 14 respondents (38.9%) had a moderate level, and 7 respondents (19.4%) had a low level of knowledge. Regarding dietary compliance, 13 respondents (36.1%) were compliant, 18 respondents (50.0%) were moderately compliant, and 3 respondents (13.9%) were non-compliant. There was a tendency showing that higher knowledge levels were positively correlated with better dietary compliance, in line with WHO’s principle that health education is an essential intervention in managing chronic diseases. This study recommends strengthening ongoing educational programs by healthcare professionals, particularly in delivering accurate and easy-to-understand information about diet management for hemodialysis patients.

This study examines the influence of work discipline, employee motivation, and work environment on employee performance at the Office of Women Empowerment, Child Protection, Population Control, and Family Planning (DP3AP2KB) of Batam City. The research applies a quantitative approach with an associative design to determine the relationship and influence among variables. Data were collected from all employees using a structured questionnaire that had been tested for validity and reliability to ensure the accuracy of the research instrument. The analysis technique used is multiple linear regression to evaluate both partial and simultaneous effects of the independent variables on employee performance. The findings indicate that work discipline, motivation, and work environment collectively contribute significantly to improving employee performance. Individually, each variable also shows a meaningful and positive effect, reflecting the importance of both internal and external factors in shaping employee outcomes and productivity. These results imply that strengthening discipline, enhancing employee motivation, and creating a supportive, comfortable, and conducive work environment are essential strategies for improving organizational performance and achieving institutional goals effectively. Therefore, organizations are encouraged to implement policies and programs that support employee development, maintain a positive work atmosphere, and improve overall work quality in a sustainable manner.

This study addresses the issue of suboptimal student academic performance, which is frequently linked to the selection of instructional strategies that do not actively engage learners. Learning outcomes represent a multidimensional construct involving knowledge acquisition, attitude development, and skill formation. Therefore, the application of an appropriate learning model is essential to support meaningful learning experiences. This research aims to investigate the impact of implementing a Problem Based Learning (PBL) model supported by audio-visual media on students’ academic achievement. A quantitative approach with a quasi-experimental design was employed. The study involved two groups: an experimental class receiving the PBL intervention and a control class experiencing conventional instruction. Data were collected through pretest and posttest assessments and analyzed using both descriptive and inferential statistical techniques. The findings reveal a statistically significant difference between the two groups, indicated by a significance value below 0.05. This confirms that integrating problem-based strategies with audio-visual support contributes positively to improving students’ learning outcomes. The results highlight the importance of student-centered learning environments in fostering deeper understanding and engagement.

Burnout syndrome is a condition characterized by emotional exhaustion, depersonalization, and a diminished sense of self-efficacy that nurses often experience due to high workloads. One approach that can be taken to reduce the level of burnout syndrome is through mindfulness-based breathing exercises. The objective of this study is to determine the effect of mindfulness-based breathing exercises on the level of burnout syndrome among nurses in the inpatient ward at R. W. Mongisidi Teling Hospital, a Type II General Hospital in Manado. This study employed a quasi-experimental design using a one-group pretest-posttest approach. The study population consisted of 87 nurses, with a sample of 20 respondents selected using purposive sampling. Data collection was conducted using the Mindfulness-Based Breathing Exercise SOP and a burnout questionnaire. The data were then analyzed using a T-test with a significance level (α) of 0.05. The study results showed that the mean score for the burnout syndrome among nurses in the inpatient ward of R. W. Mongisidi Type II General Hospital before the mindfulness-based breathing exercise intervention was 43.65, and the mean score after the intervention decreased to 40.40. The T-test results yielded a p-value of 0.000 < 0.05, indicating a significant effect of mindfulness-based breathing exercises on the burnout syndrome levels among nurses in the inpatient ward of RS TK II. R. W. Mongisidi in Teling, Manado. Mindfulness-based breathing exercises have a significant effect on burnout syndrome levels among nurses because this intervention helps improve self-awareness, control emotions, and reduce work-related stress. Recommendation: This intervention can be routinely implemented in hospitals as an effort to improve nurses’ psychological well-being and the quality of healthcare services.

Burnout syndrome is a condition characterized by emotional exhaustion, depersonalization, and a diminished sense of self-efficacy that nurses often experience due to high workloads. One approach that can be taken to reduce the level of burnout syndrome is through mindfulness-based breathing exercises. The objective of this study is to determine the effect of mindfulness-based breathing exercises on the level of burnout syndrome among nurses in the inpatient ward at R. W. Mongisidi Teling Hospital, a Type II General Hospital in Manado. This study employed a quasi-experimental design using a one-group pretest-posttest approach. The study population consisted of 87 nurses, with a sample of 20 respondents selected using purposive sampling. Data collection was conducted using the Mindfulness-Based Breathing Exercise SOP and a burnout questionnaire. The data were then analyzed using a T-test with a significance level (α) of 0.05. The study results showed that the mean score for the burnout syndrome among nurses in the inpatient ward of R. W. Mongisidi Type II General Hospital before the mindfulness-based breathing exercise intervention was 43.65, and the mean score after the intervention decreased to 40.40. The T-test results yielded a p-value of 0.000 < 0.05, indicating a significant effect of mindfulness-based breathing exercises on the burnout syndrome levels among nurses in the inpatient ward of RS TK II. R. W. Mongisidi in Teling, Manado. Mindfulness-based breathing exercises have a significant effect on burnout syndrome levels among nurses because this intervention helps improve self-awareness, control emotions, and reduce work-related stress. Recommendation: This intervention can be routinely implemented in hospitals as an effort to improve nurses’ psychological well-being and the quality of healthcare services.

This study aims to analyze the relationship between self-control and the moral development of students at Medan State University. Self-control is an individual's ability to control emotions, impulses, and behavior to align with prevailing moral norms and values ​​in both academic and social settings. This study employed quantitative methods, collecting data through questionnaires distributed to students. The research instrument was used to measure students' levels of self-control and their moral development, as reflected in their attitudes of responsibility, honesty, discipline, and ethical behavior on campus. The data obtained were analyzed to determine the relationship between the two variables. The results showed that students' levels of self-control were considered good and had a positive relationship with moral development. This suggests that students with better self-control tend to display behaviors consistent with prevailing moral values ​​and norms. Therefore, self-control plays a crucial role in the moral development of students, necessitating ongoing efforts by universities to support the development of self-control through character development and academic activities oriented toward moral values.