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This study aims to analyze the effect of variations in bi-LED projector power and the use of a voltage stabilizer on the luminous flux on a motorcycle. The luminous flux produced by a motorcycle lighting system plays a very important role in improving rider visibility and safety, especially at night. Therefore, this study uses a quantitative experimental method with a two-way factorial approach (Two-Way ANOVA) to test the effect of two main variables, namely the bi-LED projector power and the voltage stabilizer configuration. The power variables tested include three power levels, namely 35 W, 70 W, and 105 W, while the voltage stabilizer configuration includes three conditions, namely without a stabilizer, 14 V, and 14.5 V. Luminous flux measurements were carried out using a lux meter at a distance of five meters from the reflective surface, and the results were then combined into lumen units to facilitate comparison between power variations and stabilizers. The results showed that increasing the bi-LED projector power significantly increased the luminous flux produced. The 105 W power output produced the highest luminous flux, reaching 42,319 lumens when combined with a 14.5 V voltage stabilizer. This demonstrates that the combination of high power and proper voltage stabilizer use can improve the quality of motorcycle lighting. The very low P-value (0.000) and R² of 100% indicate that the predictive model used in this study is robust and reliable. Overall, this study emphasizes the importance of using a voltage stabilizer in motorcycle lighting systems. A voltage stabilizer is not only a complementary device but also a crucial component for improving visibility and driving safety, especially at night. Therefore, proper use of a stabilizer can improve lighting performance and provide significant safety benefits.

Enhancing the efficiency of renewable energy on ships is crucial for reducing dependency on fossil fuels. This research employs the Research and Development (R&D) method, aiming to design and implement a solar panel optimization system for battery charging, with a focus on increasing power efficiency and providing real-time performance monitoring. The system is designed using Maximum Power Point Tracking (MPPT) technology to maximize the solar panel's power output. A 200Wp solar panel with dimensions of 1290 x 760 x 30 mm was utilized. Static testing results show that the deployed sensors possess a high degree of accuracy, with an average error of 0.71% for the temperature sensor and only 1.81% for the light sensor used to monitor environmental conditions. Dynamic and system integration tests prove that the MPPT implementation significantly increases power output efficiency by 30.83% compared to a system without MPPT. Furthermore, the system with MPPT charges the battery approximately 27% faster. Additionally, the developed Modbus protocol-based monitoring system enables comprehensive and remote monitoring of key parameters such as voltage, current, temperature, and light intensity via a cloud database. Data communication reliability tests confirmed the system's capability to transmit entire data packets to a Google Sheets database at a periodic interval of 15 seconds without failure. Based on these results, the developed solar panel optimization system is feasible for implementation in maritime environments to enhance the utilization efficiency of renewable energy and the operational reliability of onboard systems.

Waste candlenut shells are one type of biomass that has significant potential to be developed as an alternative energy source, particularly in the form of briquettes. Candlenut shells, which are typically discarded as agricultural waste, contain combustible material that can be transformed into solid fuel. However, the traditional briquette molding process is still done manually, which is time-consuming, inefficient, and often results in inconsistent briquette shapes and density. This study aims to design and develop a briquette molding machine specifically for processing candlenut shell waste, with the goal of improving both production efficiency and the quality of the briquettes produced. The research methodology includes several stages: mechanical design, selection of appropriate materials, fabrication of machine components, assembly, and performance testing of the machine. The resulting machine utilizes a screw conveyor compression system powered by a 5.5 HP petrol engine. It features a cylindrical mold with a 40 mm diameter to shape the briquettes uniformly. During the performance test, the machine demonstrated a maximum production capacity of 14.3 kg per hour, with an average processing time of 24 minutes and a briquette yield reaching up to 85%. The findings indicate that the machine can significantly streamline the briquette production process while maintaining product consistency and quality. This briquette molding machine is particularly suitable for household and small-scale industries aiming to utilize renewable energy sources and reduce dependency on fossil fuels. The use of this machine also supports environmental sustainability by converting agricultural waste into a usable energy product.  

Coal is an important energy source that is still widely used in industry, especially the power generation industry, because of its high energy content. However, in the process of handling and storage, coal has the characteristic of being easily oxidized, This oxidation process, if it occurs continuously, can cause internal heat accumulation which eventually triggers spontaneous combustion. This study aims to analyze changes in coal quality before and after spontaneous combustionto find out how spontaneous combustionaffects coal quality in stockpiles. The research method used is a quantitative method where the data from laboratory tests on coal quality before and after spontaneous combustionis analyzed, the comparison of coal quality in stockpile 10 before and after spontaneous combustionis then graphed to see changes in the quality of each parameter. Based on the results of the analysis of changes in coal quality before and after spontaneous combustion, there were significant changes to several coal quality parameters, namely Total Moisture which was originally from 7.06% to 5.50% (down by 1.56%), Moisture which was originally 3.91% to 3.22% (down by 0.69%), Ash Content which was originally 8.84% to 14.67% (up by 5.83%), Volatile Matter which was originally 39.77% to 35.10% (down by 4.67%),  Fixed Carbon from 47.48% to 47.01% (down by 0.47%), Sulphur from 0.55% to 0.46% (down by 0.9%), and Calorific value decreased from 6,921 to 6,289 kcal/kg (down by 632 kcal/kg). This decrease in quality has a direct effect on the selling value and efficiency of coal combustion. The existence of an analysis of changes in coal quality due to spontaneous combustioncan help companies to find out how much of an impact losses can be caused by the occurrence of spontaneous combustion. By considering the potential losses due to spontaneous combustion, the company will make efforts to prevent the occurrence of spontaneous combustion in the future to minimize the losses caused.

This research examines the role of family quality time in dealing with children with special needs (ABK) from the perspective of John 9:2-3. Based on analysis of the text, this research uses a descriptive qualitative approach with library study methods to collect and analyze data from various relevant sources. The results of the discussion show that children with special needs are God's initial creation, and there is a need for a deep understanding of human diversity and rejection of stigmatization related to children's conditions. In this context, the role of the family is very important in supporting, protecting and treating children with special needs with appropriate love and respect. The perspective of John 9:2-3 shows that the physical or mental condition of children with special needs is not the result of sin, but is an opportunity to demonstrate God's power and demonstrate God's love and deep concern for children. Therefore, implementing the role of family quality time involves several approaches, including giving full attention when together, involving children in family activities, and reading and meditating on the Bible together. So, this approach has great potential to promote the well-being and development of children with special needs, as well as strengthen healthy and inclusive intrafamilial relationships. Thus, the role of family quality time in dealing with children with special needs is important morally and spiritually, as well as in forming a strong foundation for children's growth and happiness in the family context.

This research explores how bullying is depicted in the animated film “Jumbo” through the lens of Roland Barthes' semiotic theory. Utilizing a descriptive qualitative approach, the study analyzes the denotative, connotative, and mythological meanings embedded within the film’s visual and narrative elements. Through this lens, the film is interpreted not merely as a piece of children's entertainment but as a medium that carries deeper social messages. The central character, Don, is portrayed as physically different from his peers, which becomes a symbol of broader societal rejection and marginalization. His journey reflects the internal and external struggles faced by individuals who do not conform to mainstream standards. Key symbolic components—such as Don’s unusually large physique, his inherited storybook, and the way he interacts with others—highlight themes of courage, empathy, personal identity, and the desire for social inclusion. The film subtly critiques the normalization of bullying and challenges dominant myths that suggest acceptance and success are only for those who meet certain physical or social norms. Through its narrative, Jumbo promotes values of diversity and encourages viewers, especially young audiences, to question unjust stereotypes and embrace empathy. By decoding the semiotic messages in Jumbo, this study contributes to a deeper understanding of how animated films can serve as powerful educational tools. They can raise awareness about social issues, influence attitudes, and inspire critical reflection, especially when they employ symbolism that resonates with real-life experiences. This research ultimately highlights the potential of animation as a medium for moral and social education beyond its entertainment function.

This community service activity through the Real Work Lecture (KKN) program aims to increase students' understanding and awareness of the importance of personal branding as a strategy for forming a positive identity for Generation Z. The socialization was held on August 28, 2025, at SMA Negeri 4 Siak Hulu, Teratak Buluh Village, targeting 12th grade students. The methods used were face-to-face counseling through PowerPoint presentations, interactive discussions, and evaluations in the form of pre-tests and post-tests to measure the level of understanding before and after the material was delivered. The results of the activity showed a significant increase in the average student understanding score, from 14.70 on the pre-test to 22.55 on the post-test, with a difference of 7.85 points. A paired t-test also showed a significant difference (p < 0.001), confirming that personal branding socialization is effective in improving student understanding. Thus, this activity not only adds to students' knowledge but also provides them with practical skills in building a positive self-identity, increasing their self-confidence, and preparing them to face the challenges of education and work in the digital age.

High-rise buildings such as the World Trade Center Jakarta generally have high inductive electrical loads, so that their reactive power consumption is large and the power factor decreases below the SPLN standard (≤0.85), resulting in increased power losses and operational costs. This study aims to measure the power factor value before and after repairing the detuned reactor and capacitor on the capacitor bank panel, compare the results of field measurements with ETAP simulations, and assess the feasibility of the installed capacitor bank and determine the difference in the results of the ETAP simulation between measurements and load calculations on the World Trade Center building. The methods used include literature review, field observations on the LVMDP panel, MCC and capacitor bank, discussions with supervisors, data collection of current, voltage, kW, kVAR, kVA and cos φ using Lovato DCRG8 and ampere clamp, and load simulation using ETAP software. The results show that the cosφ value increased from 0.70 to 0.95 (an increase of 35.71%), the compensated reactive power reached 204 kVAR (Lovato), 282.6 kVAR (tang ampere), and 415 kVAR (ETAP simulation), with a power factor or cosφ = 0.95. In conclusion, the replacement of detuned reactors and capacitors effectively improves the power factor in the WTC Jakarta Building, reduces reactive loads, and the ETAP simulation results are consistent with field measurements, so that the capacitor bank installed in the WTC building is declared effective in reducing reactive currents, thereby reducing kVAR, kVA loads and improving the efficiency of the electrical system distribution for better energy management

Government representatives are members of legislative institutions elected by the people to represent their interests and aspirations in the policy-making and decision-making processes of government. People's representatives have a moral and ethical responsibility in carrying out their duties as representatives of the public's interests. The early history of the formation of people's representatives dates back to the Preparatory Committee for Indonesian Independence (PPKI), which also appointed the first president and vice president in Indonesia. People's representatives are a key pillar in the democratic system, serving as a channel for the people's aspirations. In carrying out their duties, they are required to uphold ethical values, integrity, and morality. However, various cases of ethical violations involving members of the House of Representatives (DPR) have triggered an increasingly critical public response, especially in the digital era that enables information transparency. This study aims to analyze how ethical violations by people's representatives affect public perception and how social media strengthens the public's critical power. This research method is qualitative-descriptive with a case study approach. The results show that public response to ethical violations has increased sharply through digital platforms, which has a direct impact on public trust and the legitimacy of legislative institutions. Social media has become a primary medium for expressing disappointment and moral pressure on people's representatives. In addition, social media has also changed the way organizations and individuals interact. The speed of information dissemination magnifies the social impact of every action by members of the House of Representatives. Ethics reform and a stricter oversight system are needed to maintain the integrity of representatives. This research concludes that the ethics of representatives are crucial for maintaining public trust. It is crucial for representatives to uphold a code of ethics to ensure integrity, which will lead to a positive public response and trust in the government.

This study aims to improve student learning outcomes through the implementation of the Problem Based Learning (PBL) model assisted by PowerPoint media in Mathematics for Grade I students at SD IT Riyadhoturrohman. The research employs Classroom Action Research (CAR) conducted in two cycles. Each cycle consists of three meetings, following the stages of planning, implementation, observation, and reflection. The research subjects were 16 students from Grade I of SD IT Riyadhoturrohman. The Problem Based Learning model was chosen because it encouraged students to be actively involved in learning through solving contextual problems, while PowerPoint media was used to help visualize the mathematical concepts being taught. The results showed an improvement in students' learning outcomes from the pre-action stage to Cycle I, and a further increase in Cycle II. Additionally, students demonstrated improved participation, conceptual understanding, and teamwork skills. Thus, the implementation of the Problem Based Learning model assisted by PowerPoint media proved to be effective in improving the mathematics learning outcomes of Grade I students at SD IT Riyadhoturrohman.

This study aims to analyze the potential of micro, small, and medium enterprises (MSMEs) in enhancing the local economy through a case study of the Nay-Nay beverage business in Medan City. The research focuses on the contributions of MSMEs to job creation, income generation, improvement of purchasing power, development of local human resource skills, and the involvement of the local community in supply chain activities. A qualitative approach with a descriptive case study design was employed, utilizing semi-structured interviews, participant observation, and documentation analysis for data collection. The findings indicate that Nay-Nay plays a significant role in strengthening the local economic structure. The business creates employment opportunities for the surrounding community, increases household income, and contributes to the development of workforce competencies relevant to the food and beverage service industry. Moreover, the inclusion of local suppliers in the procurement of raw materials and distribution processes generates a multiplier effect that stimulates the local business ecosystem. Nonetheless, the enterprise faces notable challenges such as limited access to capital, price volatility of raw materials, and intense market competition. Overall, this study affirms that MSMEs are crucial drivers of inclusive and sustainable economic development and highlights the need for policy interventions that enhance managerial capacity and improve access to financing for small business actors.

The use of buck converters as DC step-down voltage regulators is increasingly important in various power electronics applications. However, the quality of the output voltage is often disturbed by the presence of ripple, which is influenced by variations in the duty cycle. This study aims to analyze the effect of duty cycle variations on the output voltage and ripple of a buck converter using MATLAB/Simulink simulation. The method used is quantitative simulation by varying the duty cycle from 10% to 90% in a buck converter circuit with fixed parameters: input voltage 30 V, switching frequency 40 kHz, inductor 176.25 μH, and capacitor 44.33 μF. The simulation results show that the output voltage is proportional to the duty cycle, increasing from 3.245 V at D=10% to 26.82 V at D=90%. The highest ripple occurred at D=40% with a value of 0.07 V, while the lowest ripple was at D=50% with a value of 0.0003 V. These findings indicate the existence of an optimal operating point where the system works most stably. This study provides practical guidance in designing efficient and stable buck converters for applications such as battery charging and renewable energy systems.

This article discusses humans who seek a name for their own fame in Genesis 11:1-9. Those humans want to find a name so that they will not be scattered all over the earth. The construction of the tower of Babel became a popular story in the days of Noah's descendants because of its towering structure. This became a reference for the humans to seek a name so that the whole world would recognize their greatness and power. The Tower of Babel became a symbol of human pride and arrogance. Seeking a name outside of God is inappropriate and will only bring the Lord's wrath, instead the right thing to do is for man to approach the LORD God not to seek a name for his greatness but to glorify the LORD. Therefore, in relation to this point, the research was conducted through hermeneutic work with the method of historical criticism. The researcher does hermeneutic work to get the right meaning and can be a reference for readers, especially for the GMIM Alfa Omega Kumaraka In .

This article discusses the concept of Christian leadership management centered on Christ as the foundation for forming spiritual leaders who are characterized by integrity and service. In today’s modern context, which is often driven by power orientation and human-centered success, Christian leadership offers an alternative paradigm rooted in love, humility, and servanthood. Through a literature review of various thinkers such as Daniel Ronda, Yohanes Nuban Timo, Hendrik Senduk, and John C. Maxwell, this paper emphasizes that the essence of Christian leadership is not position but a calling to serve and to make disciples of Christ. Christian leadership management encompasses theological, spiritual, and practical dimensions, ranging from personal transformation, spiritual discipline, and the formation of Christlike character, to ministry management based on servant leadership principles. This article also integrates relevant secular leadership theories such as servant leadership, transformational leadership, and situational leadership with biblical values. In conclusion, effective Christian leadership can only be realized when leaders follow the example of Christ, depend on God’s wisdom, and produce new leaders who are able to bring spiritual and social impact to the world.

This study explores the implementation of communication strategies in building personal branding on YouTube, with a particular focus on the micro-gaming content creator bioplazee. Using a qualitative approach, this research adopts a systematic literature review method by analyzing scientific journals, academic books, and other relevant sources published within the last five years. In addition, empirical analysis is conducted on the bioplazee YouTube channel to observe real-world applications of communication and branding practices. The study finds that communication strategies serve as a fundamental component in shaping audience perceptions, fostering engagement, and differentiating content creators in an increasingly competitive digital space. For micro-creators with limited resources (352 subscribers), authenticity and local cultural elements—such as using a Javanese accent and adapting to trending game themes—are found to be powerful tools for building a unique identity. However, the research also identifies gaps between theoretical models and practical execution, especially in maintaining message consistency, systematic content planning, and collaborative networking. These findings emphasize the importance of developing more structured, adaptive, and sustainable communication strategies for micro-creators to strengthen their personal branding, attract a loyal audience base, and achieve long-term growth in the dynamic landscape of digital content creation.

An electrostimulator is a medical device designed to deliver controlled electrical stimulation to nerves and muscles, supporting rehabilitation and therapy for patients with neuromuscular disorders. This study focuses on designing and developing a portable electrostimulator that offers three distinct waveform modes: continuous wave, discontinuous wave, and dense-disperse wave, providing versatility for different therapeutic needs. The device is powered and controlled by an Arduino Mega 2560 microcontroller, coupled with a Nextion touchscreen LCD interface that allows users to adjust waveform type, frequency, and stimulation intensity with ease. Waveforms are generated through an NE555 IC circuit, with amplitude adjusted via a potentiometer and subsequently amplified using a step-up transformer to achieve therapeutic voltage levels. Functionality and performance tests were conducted using an oscilloscope, and the device was benchmarked against a commercial KWD-808 electrostimulator. Results demonstrate that the developed electrostimulator reliably produces the intended waveforms, achieving peak voltages up to 32V and frequencies ranging from 33.3 Hz to 66.6 Hz, confirming its effectiveness and feasibility for non-clinical nerve and muscle therapy applications.

Gotong royong, or mutual cooperation, is a deeply rooted local cultural value in Indonesian society that plays a strategic role in strengthening social cohesion and promoting environmental consciousness. This study aims to explore and analyze the function of gotong royong in fostering social solidarity and raising community awareness of environmental sustainability through various communal activities. These activities include neighborhood cleaning, reforestation efforts, and participatory waste management, all of which require active involvement from community members. Using a qualitative descriptive method, the research was conducted through field observations and in-depth interviews with residents actively engaged in gotong royong practices. The findings reveal that gotong royong serves as a powerful social mechanism that encourages a sense of togetherness, mutual aid, and shared responsibility among community members. These interactions help to solidify social bonds and create a collective spirit that is vital for social resilience. In addition to reinforcing social relationships, the practice of gotong royong significantly contributes to enhancing environmental awareness. Communities become more proactive in maintaining cleanliness, preserving green spaces, planting trees, and managing waste sustainably. The study concludes that gotong royong is not merely a traditional cultural practice, but also an effective and relevant instrument for promoting social and environmental well-being in contemporary society. Its continued integration into community development programs could further strengthen both social solidarity and environmental stewardship, making it a vital component in sustainable development initiatives. Therefore, revitalizing and institutionalizing gotong royong is essential for fostering holistic and inclusive community growth.

This study discusses the implications of applying Restorative Justice on legal certainty and the protection of victims' rights in cases involving repeat offenders who have committed serious assault in the jurisdiction of the Tapa Police Sector, Bone Bolango. Normatively, Indonesian Police Regulation No. 8 of 2021, Article 5(e), explicitly prohibits the application of Restorative Justice for offenders who have committed repeat criminal offenses based on court rulings. However, the research findings indicate that in practice, law enforcement officials often exercise discretion to facilitate peaceful resolutions even for repeat offenders, citing the need to maintain social relationships and avoid lengthy litigation processes. This approach raises legal certainty issues, as inconsistencies between written norms and field practices can reduce legal predictability, open the door to discrimination, and weaken both general and specific deterrent effects. From the perspective of victim protection, peaceful agreements in cases involving repeat offenders risk not fully reflecting substantive justice, as victims may be in a vulnerable position due to social pressure or unequal power dynamics. This study concludes that the application of Restorative Justice to repeat offenders needs to be strictly limited through more detailed regulations and effective oversight mechanisms, so that the principles of the rule of law, legal certainty, and victim protection are upheld. Thus, Restorative Justice can remain an important instrument in Indonesia's criminal justice system without compromising legal integrity and public safety.

This study aims to analyze the role of Sio as an intermediary in traditional Nias marriage ceremonies in Ononazara Village, Tugala Oyo District, North Nias Regency. The focus is directed toward how the Sio positions himself within the customary social arena and how social, cultural, and symbolic capital serve as the foundation of his legitimacy and authority. The research problem arises from the phenomenon of social change, where the authority of parents and traditional leaders, once dominant, is now shared with the presence of the Sio as a central mediator. The study employs a qualitative method with a descriptive approach. Data were collected through observation, in-depth interviews, and documentation, validated by triangulation of sources, methods, and theories. Data analysis uses Pierre Bourdieu’s concepts of social capital and social arena to reveal the dynamics of power relations in customary practices. The findings indicate that the Sio is not merely a spokesperson but a key actor who maintains harmony, mediates Böwö (bridewealth) negotiations, and ensures effective communication between families. His position is shaped by kinship networks, deep knowledge of customs and ritual language, and social reputation. In the context of modernization, the Sio functions as both a cultural conservator and adaptive mediator who balances economic and symbolic dimensions in traditional Nias marriages.

This study evaluates the effectiveness of the Constitutional Court’s authority in reviewing laws and regulations as a means of upholding constitutional supremacy in Indonesia. Employing both normative and empirical legal research methods, it examines the Constitutional Court’s rulings from 2019 to 2024 and assesses their broader implications for the national constitutional system. The findings reveal several structural weaknesses in the review mechanism, particularly related to the enforcement of decisions and the existence of dualism between the Constitutional Court and the Supreme Court in conducting judicial reviews. These shortcomings have created inconsistencies and reduced the optimal impact of the Constitutional Court’s role. To address these issues, the research recommends comprehensive reforms, including the unification of judicial review authority, enhancement of the Constitutional Court’s executorial powers, and expansion of public access to constitutional review procedures. Such measures are expected to strengthen the Court’s role as the guardian of the constitution, improve legal certainty, and support the creation of a more coherent and harmonious legal system in Indonesia.