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Erpat Leather is a manufacturer of leather bags, pouches, wallets, and belts, located in Tirto RT 05, Bangunjiwo, Kasihan, Bantul, Yogyakarta. Some production materials are not arranged neatly, which can disrupt the smoothness of the production process. The business needs to improve the efficiency and smoothness of the production process. Then, community service activities were carried out by lecturers, educational staff, and students of the Industrial Engineering and Mechanical Engineering Study Programs of the University of AKPRIND Indonesia to increase the knowledge of Erpat Leather owners and workers about 5S (Seiri, Seiton, Seiso, Seiketsu, Shitsuke). Erpat Leather needed training to improve the smoothness of the production process, work efficiency, and work safety. This training began with a discussion between the service team and the business owner, followed by field observations by the service team, and continued with suggestions for improvement to the owner and workers, and ended with the delivery of conclusions and a group photo. The implementation of 5S at Erpat Leather is carried out through five stages, namely, first, sorting goods that are still in use and those that are no longer used; second, arranging goods in the production area in an orderly manner; third, cleaning the work environment regularly; fourth, maintaining the work area to keep it clean; fifth, disciplining good work habits, and providing slogans that cultivate 5S. This activity is expected to increase Erpat Leather's competitiveness in the leather product market by improving the smoothness of the production process.

This study aims to determine the relationship between family social support and the discipline of 4-5-year-old children at Pembina State Kindergarten. The study used a quantitative method with a descriptive correlational approach. A sample of 14 parents was selected using a purposive sampling technique. Data were obtained through a five-level Likert scale questionnaire and analyzed using the Pearson Product-Moment correlation test. The results showed that children's discipline was in the very high category at 93.5%, while family social support was also in the very high category at 94.9%. However, the correlation test showed an r value of –0.14, indicating a very weak and insignificant relationship between family social support and children's discipline. This finding indicates that, despite high family support, other factors such as role models and school habits likely have a greater influence on the development of children's discipline. This study emphasizes the importance of collaboration between families and educational institutions in supporting the development of discipline in early childhood.

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.

Sleep is a fundamental biological need for adolescents and plays a crucial role in supporting cognitive function, emotional regulation, and overall mental health. Despite its importance, sleep quality among adolescents has increasingly declined due to the interaction of individual characteristics, social environments, and daily sleep behaviors. This article aims to analyze the factors influencing adolescent sleep quality using the Social Cognitive Theory framework through a literature review of national and international journals published between 2021 and 2025. The findings show that adolescent sleep quality is shaped by personal factors, including attitudes toward sleep, self-efficacy, and psychological conditions. Environmental factors, such as parental support, peer influence, and academic demands, also significantly affect sleep patterns. In addition, behavioral factors, particularly sleep hygiene practices, play a key role in determining sleep quality. Consistently, unhealthy sleep behaviors are associated with poor sleep quality. Therefore, comprehensive interventions are needed, involving the improvement of sleep habits, strengthening adolescents’ self-regulation abilities, and enhancing family and school support to promote better sleep quality.

Nickel has become a strategic mineral in the global industrial value chain, particularly for stainless steel production and electric vehicle battery manufacturing. As one of the world’s largest nickel producers, Indonesia has implemented a downstream industrialization policy aimed at increasing value added and strengthening export performance. This study analyzes the effects of international nickel prices, destination countries’ GDP per capita, exchange rates, and the downstreaming policy on the value of Indonesia’s nickel exports (HS 75) over the period 2010–2023. The study employs a quantitative approach using panel data regression with secondary data covering five major export destination countries, namely China, Japan, South Korea, Thailand, and Singapore. Based on the Chow and Hausman tests, the Fixed Effects Model is selected as the most appropriate estimation technique, indicating the presence of country-specific heterogeneity among importing countries. The results show that destination countries’ GDP per capita and international nickel prices have a positive and statistically significant effect on Indonesia’s nickel export value. The downstreaming policy dummy variable also exhibits a positive and significant impact, suggesting that the nickel ore export ban implemented since 2020 has effectively shifted export composition toward higher value-added processed nickel products. In contrast, exchange rates are found to have no significant effect on export performance. Overall, the findings provide empirical evidence supporting the effectiveness of Indonesia’s downstream industrialization policy and highlight the importance of global demand conditions in driving the performance of processed nickel exports.

This study investigates how character education is embedded into the school culture of an Indonesian Islamic junior high school (madrasah), focusing on four core values: religiosity, honesty, tolerance, and discipline. Using a qualitative naturalistic approach, the research was conducted at MTsN 3 Halmahera Utara through in-depth interviews, participant observation, and document analysis involving school leaders, teachers, and students. The findings reveal that character education at the madrasah is not a standalone program but is institutionalized through consistent routines, religious practices, and role modeling. Religiosity is fostered through structured worship, integration of Islamic values into lessons, and spiritual habits. Honesty is promoted via trust-based learning environments, teacher exemplarity, and reinforcement of moral norms. Tolerance is cultivated through inclusive social interactions and respect for religious and cultural differences, while discipline is internalized through habitual rule-following, punctuality, and self-regulation. These findings align with existing theories and regional character education frameworks, confirming that character is best formed through embedded cultural processes and consistent adult exemplarity. The study contributes to the understanding of how Islamic schools can function as moral communities and highlights the importance of alignment between school culture, family support, and wider social contexts in achieving sustainable moral development.

The objective of this study is to comprehensively examine and analyze the influence of microstructure on the mechanical properties of metallic materials. Microstructure is known to play a crucial role in determining the mechanical behavior of metals; therefore, a thorough understanding of this relationship is essential for the development of engineering materials. This study adopts a systematic literature review approach, employing descriptive analysis and meta-analysis of recent scientific publications obtained from various reputable academic databases. The analysis results indicate that microstructure is a significant determinant of the mechanical characteristics of metallic materials, including strength, ductility, and resistance to deformation. The most influential microstructural parameters include grain size, phase distribution, crystallographic orientation, dislocation density, and the presence and characteristics of precipitates. Among these parameters, grain size has been shown to be the most dominant factor. The Hall–Petch strengthening mechanism demonstrates that grain refinement can increase the tensile strength of materials by approximately 200 to 300 percent. In addition, materials with multi-phase microstructures, such as dual-phase steels and TRIP steels, exhibit an excellent combination of strength and ductility compared to single-phase materials. Based on the meta-analysis results, each metallic material system exhibits a trade-off between strength and ductility, whereby an increase in strength is generally accompanied by a reduction in ductility. These findings indicate that achieving an optimal combination of mechanical properties for specific application requirements necessitates a comprehensive and integrated microstructural engineering approach.

Reading ability is a basic skill that plays a crucial role in the success of students' learning process. However, various studies indicate that the reading ability of junior high school students remains low. This study aims to analyze the reading ability of students at the UPT SMP Negeri 2 Mappakasunggu using Alfred Schutz's social phenomenology perspective. The research approach used was qualitative with descriptive methods. Data collection techniques included in-depth interviews, observation, and documentation of students and teachers. The results indicate that students' low reading ability is not solely caused by cognitive factors but is also influenced by subjective meanings formed through students' social experiences. The lack of a literacy culture in the family and school environment results in reading not being perceived as an important or enjoyable activity. Furthermore, the dominant use of gadgets for entertainment creates habits that reduce students' interest and concentration in reading texts. From Alfred Schutz's social phenomenology perspective, these conditions are related to students' lifeworlds and stock of knowledge, which shape their perspectives and actions toward reading. This study concludes that improving students' reading ability requires a comprehensive approach, taking into account experiences, social interactions, and the formation of meaning in reading in students' daily lives.

The growing use of smartphones among adolescents carries a high risk of addiction, which can negatively impact physical, mental, and social well-being. To address this issue, a community service program was implemented to conduct early detection of gadget addiction among high school students and provide educational health media to raise knowledge and awareness about excessive smartphone use. The program involved 240 students of SMA Negeri 1 Tuntang and was conducted in three stages: screening, development of educational materials, and health counseling. Screening used the short version of the Smartphone Addiction Scale and revealed that 90% of students were classified as addicted. Prior to counseling, 81.25% of students had low levels of knowledge regarding healthy gadget use, which significantly improved after the intervention, with 83.4% achieving high knowledge levels. Health counseling proved crucial in enhancing students’ understanding and promoting responsible smartphone habits. The program highlights the importance of collaborative efforts by schools, parents, and students to limit smartphone use, encourage physical activity, and foster face-to-face social interactions to support adolescent well-being.

Arabica coffee (Coffea arabica) contains various bioactive compounds such as caffeine, polyphenols, flavonoids, and alkaloids that have the potential to produce diverse pharmacological effects on both the autonomic and central nervous systems. The variation in its chemical composition is influenced by factors such as cultivar, post-harvest processing, and preparation methods, resulting in biological responses that are dose-dependent and not always linear. This study aimed to evaluate the pharmacological activity of arabica coffee simplicia powder at three concentrations (1%, 2%, and 4%) by observing parasympathomimetic, parasympatholytic, sympathomimetic, sympatholytic, analeptic, central nervous system stimulation and depression, as well as muscle relaxation parameters. The research was conducted using a laboratory experimental design with test animals administered orally according to the designated concentrations. The results showed that some parameters increased at higher concentrations, such as parasympathomimetic activity (51.85%) and central nervous system stimulation (63.74%), while other parameters demonstrated decreasing or biphasic patterns, such as sympatholytic activity, which was high at 1% and 4% but low at 2%, and analeptic activity, which dropped sharply at 2% and increased again at 4%. These response patterns align with literature indicating that caffeine and polyphenols such as chlorogenic acid may interact synergistically or antagonistically, generating complex pharmacological effects through mechanisms involving adenosine modulation, excitatory neurotransmitters, the enteric nervous system, as well as antioxidant and anti-inflammatory pathways. Overall, this study demonstrates that arabica coffee simplicia exhibits multipotential pharmacological activity, with responses strongly influenced by concentration and the composition of its bioactive compounds, thereby providing a basis for further research on the phytopharmaceutical potential of arabica coffee.

This study aims to analyze the implementation of the worship habituation curriculum in the formation of students' religious character at SMP IT Ma'Wattaibin Banjarejo. This study uses a qualitative approach with a case study type. Data was collected through in-depth interviews, observations, and documentation involving principals, teachers, and students. Data analysis is carried out through the stages of data reduction, data presentation, and conclusion drawing with source triangulation techniques and techniques to maintain the validity of the data. The results of the study show that the worship habituation curriculum is implemented in a structured and integrated manner in school culture through congregational prayer activities, daily prayers, recitals of the Qur'an, and habituation of Islamic manners. The implementation of the curriculum contributes significantly to the formation of students' religious character, especially in the aspects of discipline, responsibility, and awareness of worship. In addition, the habit of worship also has a positive impact on the formation of spiritual attitudes, social behavior, and harmonious relationships between students and the school environment. This study concludes that the worship habituation curriculum managed as a school-based curriculum has a strategic role in strengthening the religious character of students in integrated Islamic schools.

The prohibition of proposing to a woman during her ‘iddah period constitutes an Islamic legal provision that is firmly grounded in the normative foundations of the Qur’an and fiqh. This provision aims to preserve the clarity of lineage, protect women’s dignity, and maintain order within the legal framework of marriage. This article examines, from a normative perspective, the prohibition of proposing to a woman during her ‘iddah according to the Shāfi‘ī school of law. The study employs a normative legal research method with a qualitative approach through library research, drawing upon the Qur’an, hadith, and authoritative (mu‘tabar) Shāfi‘ī fiqh texts. The findings indicate that the Shāfi‘ī school strictly prohibits explicit proposals to women during all types of ‘iddah, including ‘iddah resulting from revocable divorce (ṭalāq raj‘ī), irrevocable divorce (ṭalāq bā’in), annulment (fasakh), and death. As for indirect proposals (ta‘rīḍ), they are permitted only for women whose ‘iddah is not accompanied by a right of reconciliation, such as ‘iddah due to death and ‘iddah of ṭalāq bā’in, while remaining prohibited during ‘iddah raj‘ī. This legal ruling reflects the prudence of the Shāfi‘ī school in preventing the occurrence of invalid marriage contracts and affirms the function of ‘iddah as an instrument of Islamic legal regulation rather than merely a biological waiting period.

This study examines the legal provisions regarding interfaith marriage in Indonesia from the perspective of Islamic law and national law. The focus lies on the differences and points of convergence between the two legal systems in assessing the validity of marriages conducted between couples of different religions. This research employs a library research method with a normative-comparative approach, analyzing primary sources such as the Qur’an, Hadith, the Compilation of Islamic Law (KHI), Law Number 1 of 1974 on Marriage, as well as relevant court decisions. The results show that Islamic law explicitly prohibits interfaith marriage, particularly between a Muslim woman and a non-Muslim man, as it contradicts the principles of faith and the objectives of marriage in Islam. Meanwhile, national law through Law Number 1 of 1974 stipulates that a marriage is valid only if conducted according to the laws of each religion and belief, which implicitly rejects the legality of interfaith marriage. In practice, however, some individuals seek legal loopholes through human rights interpretations or by registering their marriages abroad. Therefore, both Islamic and national law share the same goal: to preserve the sanctity of marriage and maintain social harmony based on the divine values upheld by the Indonesian nation.

The development of social media has encouraged students to be more active in interacting, sharing information, and establishing relationships online. However, the high intensity of social media use also increases the risk of personal data leakage. This literature study aims to examine the relationship between privacy awareness and students' safe behavior in social media use. The research was conducted by examining various sources, including scientific journals, articles, research reports, books, and online references relevant to digital security issues. The results of the study show that privacy awareness has a significant role in shaping students' safe behavior. This awareness is reflected through the practice of using strong passwords, the implementation of two-factor authentication, and prudence in sharing personal information in the digital space. Although knowledge about digital threats is quite adequate, students' safe behavior is still influenced by the level of internalization of privacy awareness. Therefore, increasing privacy awareness requires not only information, but also educational strategies that emphasize the formation of consistent digital attitudes and habits. This study makes an important contribution to understanding the relationship between privacy awareness and safe behavior, as well as being the basis for the development of more effective digital literacy programs among students.

Video steganography faces fundamental challenges in balancing embedding capacity, imperceptibility, and robustness, where conventional Least Significant Bit (LSB) methods often produce visual artifacts such as flickering. To address this, this research proposes an advanced method named Adaptive Multi-layer LSB, which dynamically adjusts the number of embedded bits in each pixel based on a multi-factor analysis of the video's spatial and temporal characteristics. This adaptation mechanism is evaluated through three primary criteria: brightness level, local texture complexity, and inter-frame motion stability. Quantitative evaluation using Peak Signal-to-Noise Ratio (PSNR), Structural Similarity Index (SSIM), and Frame Difference Stability Index (FDSI) metrics demonstrates that the proposed method achieves high visual quality, with an average PSNR of 42.15 dB and SSIM of 0.985. These results significantly outperform the non-adaptive approach, which only recorded a PSNR of 38.5 dB. More importantly, the FDSI value of this method (1.25) is much lower compared to the non-adaptive approach (3.40), demonstrating its superiority in maintaining temporal stability. Thus, this approach provides a significant contribution to enhancing security and quality in video steganography practices. Abstract: Video steganography faces fundamental challenges in balancing embedding capacity, imperceptibility, and robustness, where conventional Least Significant Bit (LSB) methods often produce visual artifacts such as flickering. To address this, this research proposes an advanced method named Adaptive Multi-layer LSB, which dynamically adjusts the number of embedded bits in each pixel based on a multi-factor analysis of the video's spatial and temporal characteristics. This adaptation mechanism is evaluated through three primary criteria: brightness level, local texture complexity, and inter-frame motion stability. Quantitative evaluation using Peak Signal-to-Noise Ratio (PSNR), Structural Similarity Index (SSIM), and Frame Difference Stability Index (FDSI) metrics demonstrates that the proposed method achieves high visual quality, with an average PSNR of 42.15 dB and SSIM of 0.985. These results significantly outperform the non-adaptive approach, which only recorded a PSNR of 38.5 dB. More importantly, the FDSI value of this method (1.25) is much lower compared to the non-adaptive approach (3.40), demonstrating its superiority in maintaining temporal stability. Thus, this approach provides a significant contribution to enhancing security and quality in video steganography practices.

This research aims to enhance the imperceptibility of secret messages in video steganography to prevent detection by third parties. Unlike cryptography, which focuses on securing the message content, this method seeks to conceal the very existence of the message by maintaining a visual quality nearly identical to the original video. The proposed approach utilizes an adaptive multi-bit scheme based on the Least Significant Bit (LSB) technique, which intelligently analyzes the local characteristics of each frame, including brightness, texture, and motion. This strategy allows for higher data insertion in areas with high visual tolerance while limiting bits in sensitive areas to prevent distortion. Evaluation results using PSNR and SSIM metrics indicate that while increasing message capacity (from 1-bit to 3-bit) reduces the PSNR from 51.80 dB to 39.44 dB, the method remains highly effective in preserving visual integrity. Overall, this technique proves to be more secure and superior to traditional LSB in balancing storage capacity with high-quality video output.

Steganography is a technique for hiding secret data within digital media such as images, audio, and video without causing noticeable visual changes. In video media, this technique offers advantages because each frame can be utilized dynamically, resulting in a larger data embedding capacity. However, conventional methods such as fixed-number Least Significant Bit (LSB) embedding still face limitations in balancing visual quality, embedding capacity, and resistance to compression or noise. To address these challenges, this study proposes an Adaptive Video Steganography Method based on Multi-Bit LSB that employs brightness, texture, and motion analysis for each frame to determine the number of embedding bits adaptively. The system adjusts the embedding capacity according to the local characteristics of the video: areas with high texture or rapid motion are assigned more bits, while static or low-texture areas use fewer bits to preserve visual quality. After the embedding process, the video quality is evaluated using PSNR (Peak Signal-to-Noise Ratio) and SSIM (Structural Similarity Index Measurement) to assess its similarity to the original video. Experimental results show a PSNR value of 45.86 dB and an SSIM value of 0.9441, Thus, the proposed adaptive method proves to be efficient, robust against disturbances, and capable of maintaining data security without compromising visual quality, making it highly suitable for implementation in multimedia-based information security systems.

Steganography is a method to hide confidential messages in digital media so that they are not detected by unauthorized parties. Unlike cryptography which protects the content of messages through encryption, steganography hides the message itself. One popular technique is the Least Significant Bit (LSB), which replaces the least important bit on the pixel with a secret message bit. However, conventional LSB methods such as 1-bit or 3-bit have limitations due to the compromise between insertion capacity and visual quality of the media. This study proposes an LSB-based video steganography method with an adaptive multi-bit embedding approach. This technique determines the number and position of bits that are dynamically inserted based on the local brightness and texture levels of each video frame, with Laplacian operators used to analyze both high and low textured areas. The process includes frame and audio extraction, frame-by-frame embedding, inserted video reconstruction, and decoding using video cover references. The evaluation was carried out quantitatively using the Peak Signal-to-Noise Ratio (PSNR) and Structural Similarity Index (SSIM) metrics, as well as qualitatively through visual comparison. The results showed that the adaptive multi-bit method was able to maintain visual quality with a PSNR of 45.23 dB and SSIM of 0.9424, and increased the insertion capacity by up to 2–3 times compared to the 1-bit adaptive method. Thus, this approach effectively balances imperceptibility and insertion capacity on dynamic video steganography systems.  

Adolescent girls represent a population that commonly experiences primary dysmenorrhea. Inadequate dietary habits may contribute to inflammatory responses, while low levels of physical activity can reduce the body’s natural pain regulation, both of which may intensify menstrual pain. This study aimed to analyze the association between dietary habits and physical activity with the severity of primary dysmenorrhea among adolescent girls. A quantitative correlational study with a cross-sectional design was conducted. Participants were selected using proportional random sampling, involving 71 eleventh-grade students at SMAN 6 Malang. Dietary intake was assessed using a FFQ, physical activity levels were measured through the PAL indicator, and dysmenorrhea severity was evaluated using the WaLIDD score. The results showed that nearly half of the respondents had adequate dietary habits (49.3%) and moderate physical activity levels (47.9%), while most participants experienced moderate primary dysmenorrhea (53.5%). Statistical analysis using Somers’ d and Gamma tests yielded p-values of 0.039 and <0.001, indicating significant associations between dietary habits, physical activity, and dysmenorrhea severity. Correlation analysis demonstrated a moderate inverse relationship between dietary habits and dysmenorrhea severity (r = −0.301) and a strong association between physical activity and dysmenorrhea severity (r = 0.690).

The increasing use of digital devices among adolescents raises concerns regarding eye health, particularly myopia. Non-ergonomic postures, such as using gadgets in a lying position, may increase accommodative stress on the eyes and contribute to visual impairment. To analyze the association between the duration and viewing distance of gadget use in a lying position and the occurrence of myopia among eighth-grade students at SMPN 119 Central Jakarta. An observational analytic study with a cross-sectional design was conducted involving 74 eighth-grade students. Data on gadget use habits, including duration and viewing distance, were collected using a structured questionnaire. Visual acuity was assessed using a Snellen chart. Bivariate analysis was performed using the Chi-square test with a significance level of p < 0.05. Decreased visual acuity was found in 62.2% of respondents. There was no significant association between viewing distance and myopia (p = 0.080). However, a significant association was identified between gadget use duration exceeding two hours per day and the occurrence of myopia (p = 0.002). The duration of gadget use in a lying position was significantly associated with myopia, whereas viewing distance was not. Limiting the duration of gadget use may help prevent visual impairment among adolescents.