SENTRI: Jurnal Riset Ilmiah

Pengaruh Penerapan Pendekatan Diferensiasi Instruksi terhadap Hasil Belajar Siswa pada Mata Pelajaran IPAS di SD Negeri 17 Palembang

Ayu Sulistia — 2026-08-31

This research is motivated by the problems that occur, namely the learning process does not involve students enough, students' responses are not very focused so that it is difficult to understand the learning. This is due to the use of conventional or uniform learning approaches that do not adapt to students' needs, thus affecting low student learning outcomes, especially in science learning. This study aims to determine the effect of implementing a differentiated instruction approach on student learning outcomes in science subjects at SD Negeri 17 Palembang. The research method used is a ₐ is accepted and H₀ is rejected, which means there is a significant influence of the implementation of the instructional differentiation approach on student learning outcomes. Based on these findings, it can be concluded that the implementation of the instructional differentiation approach has a significant effect on student learning outcomes in the science subject at SD Negeri 17 Palembang.. The research sample consisted of two classes, namely class VA and class VB, which were determined using the type of ) with a ( technique so that all members of the population were used as research samples. The results of the study showed a significant difference between the experimental class and the control class. The experimental class that received learning with a differentiated instruction approach had an average score of 87.44, while the control class that used conventional learning obtained an average score of 61.72. The results of the hypothesis test using the Independent Sample t-Test showed a significance value (2-tailed) of 0.000 < 0.05. Thus, HPretest-Posttest Control Group DesignNonequivalent Control Group DesignQuasi Experimental Designquasi-experimentalTotal Samplingposttestposttest

Peran Inovasi Jibom Alat Mirror Set dalam Meningkatkan Keselamatan dan Produktivitas Kerja dalam Kegiatan Sterilisasi Personil Gegana Sumbawa Besar Satbrimobda Polda NTB

Muhammad Syahabuddin Ibrahim — 2026-08-31

The Indonesian National Police Mobile Brigade Corps (Korps Brimob Polri), particularly Sub-Detachment 3 Gegana in Sumbawa Besar, faces operational challenges due to delays in procuring the Jibom Mirror Set, a critical device used in bomb threat sterilization. The shortage of this equipment has reduced operational effectiveness, productivity, and personnel safety by requiring manual inspection procedures that increase the risk of accidents, work-related stress, and human error. To address this issue, personnel developed an independent Jibom Mirror Set as a practical, cost-effective, and efficient innovation without compromising operational functionality. This study employed a descriptive qualitative method with a case study approach conducted at Sub-Detachment 3 Gegana, Satbrimob of the West Nusa Tenggara Regional Police, Sumbawa Besar, from January to June 2026. Data were collected through observation, in-depth interviews with three Gegana personnel and two commanding officers selected using purposive sampling, and documentation. Data were analyzed using Sugiyono's qualitative analysis model, including data reduction, data display, and conclusion drawing, with validity ensured through triangulation. The analysis used the Technology Acceptance Model (TAM) dimensions of Perceived Usefulness and Perceived Ease of Use. Findings indicate the independently developed Jibom Mirror Set significantly improves sterilization effectiveness by accelerating inspection processes, expanding visual coverage, and increasing accuracy. The device also enhanced productivity by enabling faster, more efficient, and more accurate inspections in confined areas.

Pengaruh Psychological Empowerment dan Occupational Stress Melalui Cyberloafing sebagai Mediasi Terhadap Job Performance pada Tenaga Medis

Muhammad Nabil — 2026-08-31

The job performance of healthcare workers is a key indicator of an organization’s success, particularly in hospitals. High work demands and psychological stress can affect the behavior and performance of healthcare workers. This study aims to analyze the relationship between psychological empowerment and occupational stress, with cyberloafing as a mediating variable, on the job performance of healthcare workers. This study employs a quantitative approach using the Partial Least Squares Structural Equation Modeling (PLS-SEM) with a sample size of 198 respondents selected through purposive sampling. The results indicate that occupational stress has a positive effect on cyberloafing. Furthermore, cyberloafing has a negative effect on job performance. Interestingly, occupational stress was found to have no negative effect on job performance. Furthermore, psychological empowerment also showed no positive effect on job performance, indicating that the empowerment felt by medical staff has not yet been able to effectively improve performance. The results also showed that cyberloafing does not mediate the relationship between occupational stress and job performance. These findings reinforce the need for hospital management to emphasize empowerment among medical staff in order to achieve optimal performance.

Pemanfaatan Kain Lama sebagai Produk Daur Ulang Bernilai Ekonomi dan Ramah Lingkungan

Marcella Rista Ayu Sevtyani — 2026-08-31

This study is motivated by the increasing volume of textile waste generated from household activities, garment businesses, and fashion design practices. If not properly managed, this waste can lead to environmental pollution due to its non-biodegradable nature. The purpose of this study is to examine the potential of repurposing old fabric into recycled products that hold both economic value and environmental benefits. The research employs a descriptive qualitative approach through literature review and observation of practices in processing fabric scraps into craft products. The data were analyzed descriptively to illustrate the process, types of products, and the resulting economic and environmental benefits. The findings show that old fabric can be transformed into various products such as bags, accessories, patchwork items, and household decorations using techniques like zero waste, mosaic stitching, and mixed media. This processing has proven effective in reducing textile waste accumulation, creating opportunities for creative businesses, and increasing the income of MSME entrepreneurs. The study concludes that the utilization of old fabric is a relevant strategy to support a circular economy based on sustainable fashion.

Pengaruh Training Needs Assessment, Training Resources Availability dan Organizational Culture terhadap Employee Performance dengan Motivation sebagai Moderasi

Amalia Rossa Maharani — 2026-08-31

Employee performance is a key indicator of organizational success, particularly in the garment manufacturing industry which demands high efficiency and productivity. This study aims to analyze the effects of training needs assessment, training resources availability, and organizational culture on employee performance, as well as to examine the role of motivation as a moderating variable. This study employs a quantitative approach using Partial Least Squares Structural Equation Modeling (PLS-SEM) with a sample size of 199 respondents selected through purposive sampling from employees of garment manufacturing companies in the Tangerang area. The results indicate that organizational culture has the greatest influence on employee performance, followed by training resources availability, motivation as a moderator, and training needs assessment. All hypotheses in this study were accepted, indicating that training needs assessment, training resources availability, and organizational culture have a positive and significant effect on employee performance. Furthermore, motivation was found to significantly strengthen the relationship between organizational culture and employee performance. These findings confirm that improving employee performance is not only determined by training effectiveness but is also strongly influenced by a strong organizational culture and work motivation. This study recommends that organizations strengthen their organizational culture, enhance training resources availability, and foster employee motivation to achieve optimal performance. Therefore, a holistic approach that integrates training, culture, and motivation is necessary to create sustainable employee performance in the garment manufacturing industry.

Pengaruh Social Media Marketing dan Brand Credibility terhadap Purchase Intention dengan Brand Trust sebagai Variabel Mediasi pada Produk Kosmetik

Ratih Dyah Ayu Prameswari — 2026-08-31

The rise of social media has transformed how consumers discover and evaluate cosmetic products before making a purchase. As a cosmetic brand that actively leverages Instagram and TikTok, Barenbliss needs to develop a marketing strategy that is not only visually appealing but also capable of strengthening its credibility and consumer trust. This is crucial because cosmetic consumers tend to consider quality, safety, product claims, and other users’ experiences before developing a purchase intention. This study aims to examine the influence of social media marketing and brand credibility on purchase intention, with brand trust as a mediating variable, for Barenbliss cosmetic products. This study employs a quantitative approach using purposive sampling. The data were analyzed using Structural Equation Modeling–Partial Least Squares (SEM-PLS). The results of the study indicate that social media marketing has a significant positive effect on purchase intention (β = 0.235; p = 0.014), brand credibility on purchase intention (β = 0.210; p = 0.020), social media marketing on brand trust (β = 0.388; p = 0.002), brand credibility on brand trust (β = 0.349; p = 0.002), and brand trust on purchase intention (β = 0.476; p = 0.001). Brand trust mediates the effects of social media marketing and brand credibility on purchase intention. These findings indicate that Barenbliss consumers’ purchase intention can be enhanced through social media marketing, brand credibility, and brand trust.

Mengatasi Middle Income Trap (MIT) Menuju Indonesia Emas 2045

Arina Azwani — 2026-08-31

Penelitian ini bertujuan menganalisis pengaruh pendapatan per kapita dan Indeks Pembangunan Manusia (IPM) terhadap pertumbuhan ekonomi (GDP) Indonesia dalam upaya keluar dari Middle Income Trap (MIT) menuju Indonesia Emas 2045. Data time series tahun 1994 – 2024 diperoleh dari World Bank dan BPS, dianalisis menggunakan pendekatan Autoregressive Distributed Lag (ARDL). Hasil estimasi ARDL Bounds Testing mengonfirmasi adanya hubungan kointegrasi (jangka panjang) yang valid antara pertumbuhan ekonomi, pendapatan per kapita, dan IPM (F-statistik = 6,229, signifikan pada taraf 1%). Model Error Correction Model (ECM) menunjukkan bahwa guncangan pada pertumbuhan ekonomi Indonesia periode 1994–2024 terkoreksi sangat cepat menuju keseimbangan jangka panjangnya (koefisien ECT = −1,1655; signifikan pada taraf 1%). Dalam jangka pendek, perubahan IPM periode berjalan terbukti menjadi pendorong signifikan bagi pertumbuhan ekonomi, sementara pengaruh individual pendapatan per kapita dan IPM dalam jangka panjang tidak signifikan secara statistik akibat multikolinearitas yang kuat antarkeduanya (korelasi 0,967), meskipun kontribusi gabungan keduanya terhadap pertumbuhan ekonomi terbukti nyata melalui uji kointegrasi. Temuan ini mengindikasikan bahwa strategi keluar dari MIT perlu mengintegrasikan penguatan kualitas sumber daya manusia dan pemerataan pendapatan secara berkelanjutan, tidak hanya mengandalkan pertumbuhan ekonomi jangka pendek semata.

Pengaruh Brand Authenticity dan Brand Awareness Terhadap Purchase Intention dengan Brand Engagement sebagai Moderasi pada Industri Kecantikan

Dhea Amanda Khoirunisa — 2026-08-31

This study aims to analyze the influence of Brand Authenticity and Brand Awareness on Purchase Intention with Brand Engagement as a moderating variable in the beauty industry in the Tangerang region. This study emphasizes the importance of companies in highlighting the value of Brand Authenticity, increasing Brand Awareness, and strengthening consumer emotional involvement through Brand Engagement to create a more authentic and relevant brand experience. The research method used is quantitative with a purposive sampling technique on 120 respondents. Data analysis was conducted using the Partial Least Squares–Structural Equation Modeling (PLS-SEM) method with the help of SmartPLS software. The results show that Brand Authenticity and Brand Awareness have a positive effect on Purchase Intention, which means that the higher the consumer's perception of brand authenticity and the level of brand awareness, the higher the consumer's tendency to make a purchase. In addition, Brand Engagement is proven to be able to moderate and strengthen the relationship between Brand Authenticity and Purchase Intention as well as between Brand Awareness and Purchase Intention. These findings indicate that consumer engagement with a brand can increase the effectiveness of both variables in driving consumer purchase intention and strengthening the brand's position in the Indonesian beauty market.

Pengaruh Social Media Marketing terhadap Purchase Intention dengan Moderasi Brand Trust pada Produk Fashion

Erica Agnes Yuliana — 2026-08-31

The development of social media and the competitive nature of the local fashion industry has prompted companies to implement effective marketing strategies to increase consumer purchasing intent. This study aims to analyse the influence of social media marketing, brand awareness, and consumer engagement on purchase intent, with brand trust as the moderating variable, for the local fashion brand Ecinos. The study used a quantitative approach, involving 140 Generation Z respondents from the Jabodetabek area who are active social media users and interested in Ecinos products. Data were collected through the distribution of questionnaires and analysed using Structural Equation Modelling-Partial Least Squares (SEM-PLS). The results of the study showed that social media marketing, brand awareness, and consumer engagement with the brand had a positive effect on purchase intention. These findings demonstrate that consumer trust in a brand is a key factor in enhancing the effectiveness of marketing strategies and encouraging consumer purchase intent. This study is expected to provide companies with a reference for developing more effective marketing strategies. Thus, building brand trust is crucial for local fashion brands to effectively convert digital marketing efforts into higher purchase intention among Generation Z consumers.

Formulasi Sediaan Sabun Cair Ekstrak NADES Daun Kemangi dan Uji Aktivitas Antibakteri terhadap Bakteri Staphylococcus epidermidis

Faridatul Jannah — 2026-08-31

Body odor caused by Staphylococcus epidermidis is a common problem, while long-term use of triclosan as an antibiotic carries the risk of resistance and side effects. Therefore, alternatives are needed, such as natural ingredients like basil leaves (Ocimum x africanum L.), which contain bioactive compounds with potential antibacterial properties. This study aimed to formulate a liquid soap containing basil leaf NADES extract and to test its antibacterial activity against Staphylococcus epidermidis. Extraction was performed using the Ultrasound-Assisted Extraction (UAE) method with a NADES solvent of citric acid and sucrose (1:1). The liquid soap was formulated at four extract concentrations: F0 (0%), F1 (9%), F2 (12%), and F3 (15%). Its physical properties were then evaluated, and its antibacterial activity was tested using the disk diffusion method. The results showed that all formulations met the organoleptic requirements, namely: liquid form, pale yellow to golden brown color, and a melon fragrance; pH (6–8); specific gravity (1.011–1.052); viscosity (1,160–3,566 cPs); foam height (22–43 mm); and were homogeneous, except for F3, which was found to be non-homogeneous. All formulations exhibited strong to very strong antibacterial activity with an average inhibition zone of 16.58–22.86 mm, which was higher than that of the positive control (15.23 mm). The results of the One-Way ANOVA test showed significant differences among the liquid soap formulations with a p-value < 0.05, indicating that variations in the concentration of basil leaf NADES extract have a significant effect on the antibacterial activity of the liquid soap. It can therefore be concluded that basil leaf NADES extract can be used to produce liquid soap and provides an antibacterial effect against Staphylococcus epidermidis.

Pengembangan Model Keputusan Produksi Pasta Cabai di Rumah Produksi Bersama Kabupaten Batu Bara Menggunakan Analisis Sensitivitas terhadap Harga Bahan Baku

Tri Yanti Putri Mariadi — 2026-08-31

Production decision-making in agroindustry is often affected by raw material price fluctuations, which can influence production costs, profitability, and operational sustainability. Rumah Produksi Bersama (RPB) Kabupaten Batu Bara, as a chili paste processing industry, still determines production decisions based on a simple raw material price threshold without considering the quantitative impact on production feasibility. This study aims to develop a production decision model for chili paste based on sensitivity analysis of raw material prices. The research used a quantitative model development approach through observation, interviews, documentation, production cost analysis, and sensitivity analysis. The developed model integrates raw material cost analysis, total production cost, cost of goods manufactured (COGM), break-even point (BEP), profit margin, critical raw material price determination, and production decision rules. The results show that the critical raw material price is Rp35,806/kg, which represents the maximum price limit before the company reaches the break-even condition. The model generates decision rules where production is conducted when the raw material price is below the critical value, considered when equal to the critical value, and postponed when exceeding the critical value. The developed model provides a more objective and systematic decision-making approach compared to the existing system. This model can support RPB Kabupaten Batu Bara in managing production risks and improving adaptability toward raw material price fluctuations.

Pengaruh Dukungan Sosial Teman Sebaya dan Strategi Koping terhadap Kesehatan Mental Remaja SMAN 1 Kedungwuni

Muhammad Thoriqurrohman — 2026-08-31

Adolescent mental health is an important public health issue due to the increasing risk of psychological problems caused by academic pressure, social challenges, and developmental changes. This study aims to analyze the influence of peer social support and coping strategies on adolescent mental health at SMA Negeri 1 Kedungwuni. This research employed a quantitative approach with a cross-sectional design. The sample consisted of 284 students selected using the proportionate stratified random sampling technique. Data were collected using the Peer Social Support Scale, Adolescent Coping Scale (ACS) Short Form, and Mental Health Continuum–Short Form (MHC-SF). Data analysis was conducted through descriptive analysis, Pearson correlation test, multiple linear regression analysis, t-test, F-test, and coefficient of determination using IBM SPSS 2020. The results showed that peer social support had a positive and significant effect on adolescent mental health (β = 0.260; p < 0.05). Coping strategies also had a positive and significant effect on adolescent mental health (β = 0.835; p < 0.05) and were identified as the most dominant factor. Simultaneously, peer social support and coping strategies significantly influenced adolescent mental health with an R² value of 0.609. In conclusion, strengthening peer social support and developing adaptive coping strategies are essential approaches to improving adolescent mental health.

Peningkatan Komunikasi Interpersonal Siswa Melalui Layanan Bimbingan Kelompok dengan Teknik Role Playing pada Siswa Kelas XI SMAN 2 Kudus

Salwaa Azzahra Rustiyawan — 2026-08-31

Interpersonal communication is an essential skill that supports students' social interaction and participation in the learning process. Preliminary observations at SMAN 2 Kudus indicated that several eleventh-grade students demonstrated low interpersonal communication, characterized by limited self-confidence, reluctance to express opinions, low participation in group discussions, and weak empathy toward peers. This study aimed to improve students' interpersonal communication through group guidance services using the role-playing technique. The study employed Guidance and Counseling Action Research (PTBK) conducted in two cycles consisting of planning, implementation, observation, and reflection. The participants were eight eleventh-grade students selected through purposive sampling. Data were collected using questionnaires, observations, interviews, and documentation, and analyzed through descriptive quantitative and qualitative approaches. The findings showed a consistent improvement in students' interpersonal communication. The average questionnaire score increased from 40.5% in the pre-cycle to 60% in Cycle I and 78.75% in Cycle II. Improvements were observed in openness, empathy, supportiveness, and positiveness. Students became more confident in expressing opinions, participated more actively in discussions, demonstrated greater empathy, and showed better cooperation with peers. The findings indicate that group guidance services using the role-playing technique are effective in improving the interpersonal communication skills of eleventh-grade students at SMAN 2 Kudus.

Evaluasi Kesiapan dan Strategi Akselerasi Adopsi Smart Green Technology pada UMKM Manufaktur di Kota Banjarmasin

Dyah Wulandari — 2026-08-31

The adoption of Smart Green Technology (SGT) is crucial for enhancing the competitiveness of manufacturing MSMEs (Micro, Small, and Medium Enterprises) to support Indonesia's green economic transformation and industrial downstreaming. However, the readiness level of these manufacturing MSMEs, particularly within Banjarmasin City, has never been comprehensively measured. This study aims to analyze SGT adoption readiness using the Technology Organization Environment (TOE) framework and formulate acceleration strategies. An explanatory sequential mixed-methods approach was employed, surveying 100 manufacturing MSMEs across five districts in Banjarmasin City, followed by structured stakeholder interviews. Principal Component Analysis (PCA) constructed the SGT Readiness Index, while qualitative data informed the acceleration strategies. Results showed eight indicators met factor analysis requirements, with a KMO value of 0.628 and a significant Bartlett's Test (p<0.001). PCA generated three main factors explaining 56.6% of the data variance: organizational readiness, operational and financial aspects, and technical and human resources. Based on the Readiness Index, North Banjarmasin MSMEs showed the highest readiness level (59.78), whereas Central Banjarmasin had the lowest (40.36). Additionally, textile and craft MSMEs, alongside businesses operating for 5-10 years, demonstrated higher readiness compared to the food and beverage sector. These findings indicate that organizational factors are the primary determinants of successful SGT adoption. Therefore, acceleration strategies must focus on strengthening organizational capacity, providing green financing, improving human resource competencies, and fostering government policy support to develop green industry ecosystems.

Gugatan Rekonvensi: Disparitas Antara Ketentuan Normatif Hukum Acara Perdata dan Praktik Peradilan dalam Penyelesaian Sengketa Wanprestasi (Studi Putusan Nomor 146/Pdt.G/2022/PN Srg)

Rizky Anugrah — 2026-08-31

A land Sale and Purchase Binding Agreement (PPJB) frequently gives rise to default (wanprestasi) disputes resolved through litigation. In a reciprocal agreement, allegations of default may arise from both directions, giving the defendant an interest in filing a counterclaim (rekonvensi). This study analyses the implementation of the counterclaim in resolving the default dispute in Decision Number 146/Pdt.G/2022/PN Srg and highlights the disparity between the normative rules of civil procedure and judicial practice regarding the connexity requirement of a counterclaim. The study employs a normative juridical method with statutory, case, and conceptual approaches. The results show that the counterclaim satisfied the formal requirements because it was filed together with the answer (Article 132b HIR in conjunction with Article 158 paragraph (1) RBg) and was closely connected to the principal claim as both derived from PPJB Number 75 over the same object, without violating the prohibitions in Article 132a HIR. Although Article 132a HIR and Supreme Court Circular Number 7 of 2012 do not require connexity, judicial practice treats connexity as a decisive requirement, as shown by a comparison with Decision Number 288/Pdt.G/2021/PN.Jkt.Utr, in which the counterclaim was declared inadmissible. This disparity should be corrected by affirming connexity as a binding guideline grounded in the principles of civil procedure.

Analisis Struktur Beton Bertulang Gedung PT Astari Niagara Internasional Menggunakan Metode Analisis Pushover Sesuai SNI 1726-2019

Endah Purnamasari — 2026-08-31

The increasing demand for earthquake-resistant buildings requires structural performance evaluation methods that are capable of representing nonlinear behavior under seismic loading. This study aims to analyze the reinforced concrete structure of the Astari Niagara International, Ltd building using the Pushover method in ETABS and to evaluate the development of plastic hinges and the structural response under lateral loading based on SNI 1726:2019. The research employed a three-dimensional structural model with gravity, live, and seismic loads, while nonlinear static (pushover) analysis was performed by assigning plastic hinges to beams and columns. The evaluation referred to ATC-40, FEMA 356/FEMA 440, and Pranata (2006), including the interpretation of capacity curves, displacement response, and plastic hinge distribution. The modal analysis produced 12 vibration modes with a fundamental period of 0.577969 s and an elastic spectral displacement of 54.77 mm. The recorded capacity curves indicated maximum base shears of 16,737.67 kN in the X direction and 16,486.71 kN in the Y direction, while the Y direction exhibited greater displacement, indicating lower lateral stiffness. Plastic hinge development was dominated by the A–B and B–C performance ranges, with only a few hinges progressing to higher damage states. However, the nonlinear analysis did not reach convergence because the Dead Nonlinear case produced 34 null steps and two negative stiffness eigenvalues, resulting in unstable initial conditions for the PUSH X and PUSH Y analyses. Consequently, the capacity curves and plastic hinge distributions are descriptive only and cannot yet be used to determine the performance point, target displacement, ductility, or seismic performance level. Structural model improvement and successful convergence are required before a definitive seismic performance evaluation can be established.

Faktor-faktor yang Memengaruhi Kepatuhan Budaya K3 dan Risiko Infeksi Terkait Laboratorium (LAIs) di Indonesia: Literature Review

Herbert Wau — 2026-08-31

Background: Medical laboratories represent high-risk working environments for Laboratory-Acquired Infections (LAIs) due to daily interactions with infectious specimens. In Indonesia, this challenge is compounded by a high burden of infectious diseases and gaps between occupational safety regulations and field practices. Objective: This study aims to analyze the factors influencing infectious disease transmission among laboratory workers in Indonesia and evaluate the effectiveness of compliance with safety standards. Method: This study utilized a Literature Review method following the PRISMA 2020 guidelines. Literature searches were conducted across Google Scholar, PubMed, ResearchGate, and Garuda databases for original research articles published between 2017 and 2026. A total of 15 selected articles were synthesized narratively. Results: The primary factors identified include the level of compliance in using Personal Protective Equipment (PPE), knowledge and attitudes toward Standard Operating Procedures (SOPs), as well as management factors such as training and supervision. Inappropriate use of PPE and unsafe practices, such as manual needle recapping, emerged as critical risks for transmission. Conclusion: The risk of infection transmission is multifactorial, encompassing individual, behavioral, and work environment elements. Strengthening a safety culture supported by PPE logistical backing and strict supervision is essential to protect laboratory personnel.

Implementasi Metode Oreste dalam Pemilihan Prioritas Supplier Biji Kopi Arabika Terbaik pada King Koffie

Galang Asa Mulya — 2026-08-31

King Koffie is a business engaged in the production of ground coffee and coffee roasting. In its production activities, the company relies on coffee bean supplies from several suppliers, each with different characteristics. Currently, the supplier selection process at King Koffie is still carried out conventionally and largely depends on subjective considerations, such as the closeness of relationships and long-term cooperation, without a systematic evaluation. This study employs the ORESTE method to determine the priority ranking of suppliers. The evaluation criteria include quality, price, responsiveness/service, and delivery. The ORESTE method is applied to identify the best Arabica coffee bean supplier based on the priority of criteria established by the business owner. The results indicate that the weights of the criteria are 0.5208 for quality, 0.2708 for price, 0.1458 for responsiveness/service, and 0.0625 for delivery. These findings show that quality is the most important criterion in the supplier selection process. The preference values calculated using the distance score are 2.182367621 for Supplier A, 3.183554881 for Supplier B, 2.419090234 for Supplier C, 2.92661611 for Supplier D, and 2.686041486 for Supplier E. Since the supplier with the lowest preference value is considered the highest priority, Supplier A is identified as the best supplier with a preference value of 2.182367621.

Pengembangan Media Permainan Sirep berbasis Deduksi Sosial sebagai Sarana Sex Education dalam Pencegahan Pernikahan Dini pada Remaja di SMA Islam Karangploso

Sabrina Choirunisya Salsabila — 2026-08-31

Early marriage remains an issue that requires serious attention because it may lead to various adverse impacts on adolescents' reproductive health, particularly among females. The lack of comprehensive sex education has resulted in adolescents having limited knowledge regarding reproductive health and the risks associated with early marriage. This study aimed to develop the SIREP social deduction-based game as a sex education medium for adolescents. The study employed a Research and Development (R&D) method. The research subjects consisted of 10 adolescents from SMA Islam Karangploso who participated in the product trial. The research instruments included a needs assessment questionnaire for adolescents, material expert validation sheets, media expert validation sheets, and a user response questionnaire. The developed SIREP game media covers topics on sexual behavior and its consequences, reproductive rights and health, sexual violence and harassment, and the impacts of early marriage. The findings showed that the SIREP game media achieved a feasibility score of 95.8% from the material expert, 97.5% from the media expert, and 90.5% from the respondents. Based on these results, the SIREP game media was categorized as highly feasible. The high feasibility scores indicate that the developed media is appropriate in terms of content, design, and ease of use as an educational tool for adolescents. Therefore, the SIREP social deduction-based game has the potential to serve as an alternative reproductive health education medium that is feasible, engaging, and acceptable to adolescents in delivering information on reproductive health and the prevention of early marriage.

Antara Tradisi dan Modernisasi: Dinamika Pedagang Batik di Pasar Klewer pada Masa Orde Baru

Alyah Rohmawati — 2026-08-31

This research aims to examine how batik traders in the Surakarta Klewer Market carry out trading activities in the midst of the pressure of modernization and the policies of the New Order regime. Klewer Market, which initially grew from traditional trading practices in Slompretan Market, grew rapidly in the 1968-1970s period until it became the largest batik and textile wholesale center in Central Java, built in the form of a multi-storey market inaugurated by President Soeharto. Research shows how batik traders maintain a network of traditional socio-economic relations, such as direct relationships with artisans and fluid bargaining patterns, while at the same time adapting modern business methods, such as wholesale sales systems, permanent kiosk arrangements, and more formal market arrangements. The dynamics asserts that modernization during the New Order did not immediately replace tradition, but created a new form of batik trading practice that was rooted in local wisdom but arranged in a more orderly market structure.

Implementasi Metode Fotogrametri dalam Program Pendaftaran Tanah Sistematis Lengkap (PTSL) di Desa Jorok, Kabupaten Sumbawa

Rahmad Rosyadi Perdana — 2026-08-31

Complete Systematic Land Registration (PTSL) is a national strategic program intended to accelerate legal certainty over land rights. The Sumbawa Regency Land Office has implemented an Unmanned Aerial Vehicle (UAV)-based photogrammetric method in accordance with Technical Guideline Number 3/Juknis-HK.02/III/2023 to improve the performance of cadastral mapping. This study analyzes the implementation, effectiveness, and efficiency of the photogrammetric method in Jorok Village, Untir Iwes District, and identifies its supporting and inhibiting factors. A qualitative descriptive approach was employed. Data were collected through in-depth interviews, observation, and documentation involving six informants directly engaged in the PTSL process, and were analyzed using the interactive model of Miles, Huberman, and Saldaña. The findings show that photogrammetry accelerates spatial data acquisition and produces high-resolution orthophotos with reported horizontal accuracy of approximately 2-5 cm when ground control points are properly distributed. Daily mapping productivity increased from about 50-60 parcels using terrestrial surveying to 100 parcels or more using photogrammetry. A village area of approximately 400 hectares could be photographed in seven days and processed within one to two additional days. Nevertheless, only about 60-70% of parcels could be identified directly from orthophotos, while dense vegetation, hilly terrain, weather, and unclear boundary markers required terrestrial verification. Therefore, an integrated photogrammetric-terrestrial approach is the most effective, efficient, and technically accountable model for PTSL implementation in Jorok Village.

Pengaruh Pelatihan, Motivasi, dan Kompetensi terhadap Kinerja Pegawai di Biro Organisasi SETDA Provinsi Jawa Tengah

Dian Febriya Elfandari — 2026-08-31

This study aims to analyze the effect of training, motivation, and competence on employee performance at the Organizational Bureau of the Regional Secretariat (SETDA) of Central Java Province. The population of this study consisted of 52 employees, with a census method (saturated sampling) employed to include all members of the population. This research used a quantitative approach with primary data collected through questionnaires. Data analysis was conducted using multiple linear regression, preceded by validity and reliability tests to ensure the quality of the research instruments. The results indicate that, partially, training and competence have a positive effect on employee performance. Among the three independent variables, competence has the most dominant influence on employee performance at the Organizational Bureau of the Regional Secretariat (SETDA) of Central Java Province.

Pengaruh Word of Mouth, Promosi dan Citra Sekolah terhadap Keputusan Orang Tua Siswa Memilih Sekolah SMP Santu Petrus Pontianak

Yolanda Maya Gita — 2026-08-31

Increasing competition among educational institutions requires schools to implement effective marketing strategies to attract prospective students and their parents. SMP Santu Petrus Pontianak, as one of the leading private junior high schools in Pontianak City, faces increasing competition from schools offering various educational advantages. This study aims to analyze the influence of word of mouth, promotion, and school image on parents’ decision to choose SMP Santu Petrus Pontianak. A quantitative approach with a causal research design was employed. The study involved 218 parents selected through purposive sampling. Data were collected using structured questionnaires and analyzed using the Structural Equation Modeling–Partial Least Squares (SEM-PLS) method with SmartPLS software. The results indicate that word of mouth has no significant effect on parents’ school choice decisions (β = -0.051; p = 0.360). In contrast, promotion has a positive and significant effect (β = 0.222; p < 0.001), while school image has the strongest positive and significant effect (β = 0.726; p < 0.001). The R-square value of 0.710 indicates that the three variables explain 71.0% of the variance in parents’ school choice decisions. These findings demonstrate that strengthening school image and implementing effective promotional strategies are essential for increasing school competitiveness and influencing parents’ decisions in selecting a school.

Analisis Pengaruh Pemanfaatan Sistem Informasi Akuntansi dan Laporan Keuangan terhadap Kinerja Umkm: Studi Kasus di Kota Cepu

Alvina Aprinka — 2026-08-31

This research examines whether the application of Accounting Information Systems (AIS) and the utilization of financial reports influence the business performance of Micro, Small, and Medium Enterprises (MSMEs) operating in Cepu, Blora Regency, Central Java. A quantitative design was applied through a survey-based approach. The study used primary information obtained from questionnaires completed by 90 MSME proprietors who were chosen through purposive sampling according to specified eligibility requirements. Multiple regression analysis was conducted after the dataset satisfied the validity, reliability, and classical assumption assessments. The results are anticipated to provide practical guidance for MSME operators concerning the role of AIS implementation and financial report usage in strengthening enterprise performance.

Hubungan Antara Self-Compassion dengan Resiliensi Akademik pada Siswa Kelas XI di SMA Negeri 1 Depok Sleman

Septiana Rahmawati — 2026-08-31

High school students face various academic demands—such as assignments, exams, performance-based competition, and expectations from both school and family—that can generate academic pressure. Navigating these conditions requires the ability to endure, adapt, and bounce back from adversity, a quality known as academic resilience. One internal factor believed to play a role in enhancing academic resilience is self-compassion: an individual's ability to treat themselves with kindness, recognize failure as a part of the human experience, and maintain a balanced awareness of negative experiences. This study aimed to examine the relationship between self-compassion and academic resilience among 11th-grade students at SMA Negeri 1 Depok Sleman. A quantitative approach utilizing a correlational method was employed. The study involved 146 11th-grade students from SMA Negeri 1 Depok Sleman, selected via random sampling. Data were collected using a modified Self-Compassion Scale (based on Neff’s theory) and a modified Academic Resilience Scale-30 (ARS-30; based on Cassidy’s theory). The data were analyzed using the Pearson correlation technique. The results revealed a correlation coefficient of 0.797 with a significance value of 0.000 (p < 0.05), indicating a strong relationship; thus, the research hypothesis was accepted. Categorization results showed that the majority of students possessed moderate to high levels of both self-compassion and academic resilience. Consequently, it can be concluded that there is a significant positive relationship between self-compassion and academic resilience: higher levels of self-compassion correspond to higher levels of academic resilience, and vice versa. These findings have implications for the development of guidance and counseling programs that focus on fostering self-compassion as a means to strengthen students' academic resilience.

Evaluasi dan Analisis Kekuatan Jembatan Pipa Armco Berdasarkan Tegangan Izin pada Proyek Pembangunan Jalan Inspeksi JDU-JDP Ibu Kota Negara (IKN)

Hariyanto Hariyanto — 2026-08-31

The Armco pipe bridge is a Corrugated Steel Pipe (CSP) structure that relies on soil-structure interaction to support road infrastructure loads. This study evaluates the structural strength of the Armco pipe bridge on the JDU-JDP Inspection Road construction project in the National Capital City (IKN) using the Allowable Stress Design (ASD) method and the Ring Compression Theory referring to ASTM A796 and SNI 1725:2016. Data processing combined manual calculation in Excel with numerical simulation using ETABS software. The pipe under study has a diameter of 2,100 mm, a plate thickness of 3.5 mm, and a soil cover depth of 2.1 m. The results show an actual stress (σactual) of 194.310 MPa, below the allowable stress (σallowable) of 210 MPa with a safety factor of 2, giving a stress ratio of 0.925 and confirming that the structure is safe. The shear stress reaches 88.340 MPa, also within the allowable limit. Deflection analysis records a deflection of 2.699 mm, far below the maximum allowable deflection of 105 mm. The soil cover depth is shown to influence load distribution: a deeper embankment widens the spread of live load before it reaches the pipe crown, reducing the vertical pressure received by the pipe wall. These findings confirm that the Armco pipe bridge is a safe and efficient structural solution.

Pengaruh Penggunaan Media Roda Putar Huruf terhadap Minat Belajar Membaca Siswa Kelas 1 SD Negeri 53 Palembang

Lista Anisa Feli — 2026-08-31

This study aims to determine the effect of using the letter spinning wheel media on the reading learning interest of 1st-grade students at SDN 53 Palembang. This research employs a pre-experimental method with a One-Group Pretest-Posttest Design. The subjects of the study were 28 1st-grade students. The instrument used was a short essay test consisting of 10 questions to measure learning interest before and after the treatment. The learning process in the classroom utilized the letter spinning wheel media. Based on the statistical test results, it showed a value of 0.000 < 0.025 and a 2-tailed sig. value o f 0,935 > 0.05. Therefore, it can be concluded that there is an effect of using the letter spinning wheel media on the reading learning interest of 1st-grade students at SDN 53 Palembang.

Studi Kasus Faktor Risiko Ketuban Pecah Dini pada Multigravida Aterm di Kabupaten Ponorogo

Putri Ardita Sari — 2026-08-31

Prelabor rupture of membranes (PROM) remains an obstetric complication that may increase the risk of maternal infection, failed labor progression, operative delivery, and neonatal morbidity. This case study aimed to identify plausible risk factors, describe the clinical pathway, and evaluate referral continuity in a term multigravida in Ponorogo Regency. A descriptive case-study design was applied to a 31-year-old woman, G2P10001, at 39 weeks and 4 days of gestation who received care at an independent midwifery practice in January 2026. Data were obtained from interviews, serial physical examinations, the maternal and child health handbook, antenatal records, a Poedji Rochjati risk score card, an intrapartum observation sheet, and hospital information reported by the patient. The mother completed nine antenatal visits, had a hemoglobin level of 12.9 g/dL and a risk score of 2, and had no history of anemia, reproductive-tract infection, chronic disease, heavy physical activity, or previous PROM. Multigravidity and a seven-year interpregnancy interval were identified as plausible contextual factors, although causality cannot be inferred from a single case. Membrane rupture began before effective labor; the cervix remained at 1 cm with 25% effacement and no adequate progress. The mother was referred, underwent induction, and subsequently delivered by cesarean section. The male newborn cried immediately and had no reported abnormality. Structured screening, prompt recognition of absent labor progress, and timely interfacility referral supported a favorable maternal and neonatal outcome.

Perancangan Sistem Informasi Pendaftaran Peserta Didik Baru berbasis Web dengan Penilaian Rapor pada SMP Bustanul Ulum Nu Jatirokeh

Yayang Izzatul Haq — 2026-08-31

The New Student Admission (PPDB) process is one of the administrative activities conducted at the beginning of each academic year. At SMP Bustanul Ulum NU Jatirokeh, the PPDB process is still carried out manually, resulting in inefficient applicant data management, longer data retrieval times, and manual selection based on students' report card scores. This study aims to design and develop a web-based New Student Admission Information System with report card assessment to support the registration process, student data management, data verification, and ranking process more effectively and efficiently. The system was developed using the Waterfall software development methodology, which consists of requirements analysis, system design, implementation, testing, and maintenance. The application was built using the Laravel framework with a MySQL database, while system testing was conducted using the Black Box Testing method. The results indicate that the system is capable of facilitating user registration, student data entry, document uploads, data verification, and the ranking process based on report card scores as the primary assessment criterion, with achievement scores serving as additional points. Based on the testing results, all system functions operated according to user requirements, indicating that the system can support the implementation of the PPDB process at SMP Bustanul Ulum NU Jatirokeh in a more effective, efficient, and well-organized manner.

Analysis of District Clustering in East Priangan, West Java, Based on Health Education and Infrastructure Using the K-Means Method

Yuga Mudzadid Fiqri — 2026-08-31

Development disparities between regions remain an issue that affects the equitable distribution of educational, health and infrastructure facilities. Differences in the availability of these facilities lead to variations in service levels and development across sub-districts. This study aims to cluster sub-districts in the East Priangan region of West Java based on educational, health and infrastructure characteristics using the K-Means Clustering method. The data used are from 2024, obtained from the Central Statistics Agency (BPS) of districts/cities in the East Priangan region, comprising 13 research variables and 132 sub-districts as the objects of analysis. Prior to the clustering process, the data was tested using the Kaiser-Meyer-Olkin (KMO) and multicollinearity tests. The test results showed a KMO value of 0.846, indicating that the data was suitable for further analysis and that no multicollinearity issues were found. Determining the optimal number of clusters using the Elbow method yielded two clusters as the optimal number. The clustering results showed that Cluster 1 comprised 30 sub-districts with relatively higher facility availability, whilst Cluster 2 comprised 102 sub-districts with relatively lower facility availability. The distance between cluster centres of 202.258 indicated a fairly clear difference in characteristics between the two clusters. It is hoped that the results of this study can serve as a basis for the formulation of more effective and targeted development policies.

Peran Entrepreneurial Perseverance dalam Memperkuat Hubungan Pendidikan Kewirausahaan terhadap Entrepreneurial Readiness Mahasiswa

Choirul Umam Yanwar — 2026-08-31

Entrepreneurship education in higher education has not always produced an equal level of entrepreneurial readiness among students. An internal pre-survey of 401 students showed that only 43 students (10.7%) were running a business. This study examines the role of entrepreneurial perseverance in strengthening the relationship between entrepreneurship education and entrepreneurial readiness among undergraduate students of the Entrepreneurship Study Program at Universitas Pendidikan Indonesia. A quantitative causal-associative design was applied to a population of 243 active students from the 2022, 2023, and 2024 cohorts. Data were collected from 203 respondents selected through simple random sampling using a five-point Likert questionnaire. Entrepreneurship education was measured by 15 valid items, entrepreneurial readiness by 18 items, and entrepreneurial perseverance by 8 items. The data were analyzed using Hayes' PROCESS Macro Model 1 with 5,000 bootstrap resamples and a 95% confidence interval. The findings show that entrepreneurship education, entrepreneurial readiness, and entrepreneurial perseverance were generally in the high category. The main coefficient of entrepreneurship education at the moderator reference point was not significant, whereas the interaction between entrepreneurship education and entrepreneurial perseverance was positive and significant. Conditional effects increased from 0.3672 at low perseverance to 0.5141 at the mean level and 0.6610 at high perseverance. These results indicate that perseverance operates as an enhancing moderator: entrepreneurship education is more strongly associated with students' readiness when they maintain effort, focus on long-term entrepreneurial goals, and persist when facing obstacles. The study highlights the importance of integrating perseverance development into experiential entrepreneurship learning.

Kedaulatan dan Kepastian Hukum dalam Pemajakan Perdagangan Melalui Sistem Elektronik (PMSE) Lintas Negara: Analisis Yuridis atas Konsep Kehadiran Ekonomi Signifikan di Indonesia

Faizah Ahlam Notavia — 2026-08-31

Indonesia's rapid digital economy growth has positioned the country as a major market for cross-border Over The Top (OTT) and e-commerce providers such as Netflix, Spotify, Google, and Meta. However, the conventional Permanent Establishment (PE) concept, which requires physical presence, is no longer adequate to capture taxing rights over income earned by these digital enterprises from the Indonesian market. The Government responded through Government Regulation in Lieu of Law Number 1 of 2020, later enacted as Law Number 2 of 2020, introducing the concept of significant economic presence as the basis for imposing Income Tax (PPh) or Electronic Transaction Tax (PTE), alongside Value Added Tax (VAT) on electronic commerce that has been effectively implemented through Minister of Finance Regulation Number 48/PMK.03/2020 and its amendments. This study analyzes the legal framework and juridical problems in implementing the significant economic presence concept, relating it to the principles of tax sovereignty, Double Taxation Avoidance Agreements (DTA), and legal certainty. The study employs a normative juridical method with statute and conceptual approaches, descriptive-analytical in nature, using library research. The findings indicate that although the legal framework for significant economic presence exists, its implementation as a basis for PPh/PTE remains ineffective because quantitative thresholds have not been further regulated and potentially conflict with DTA commitments. Meanwhile, current practice is limited to VAT collection, so the fiscal contribution of global digital companies is considered disproportionate to the economic value they extract from the Indonesian market. This study recommends the issuance of derivative regulations that definitively set the significant economic presence thresholds, strengthening Indonesia's position within the OECD Pillar One and Pillar Two global consensus framework, and harmonizing such measures with the latest bilateral trade agreements, including reciprocal trade schemes, to minimize the risk of tariff retaliation.

Dapatkah Konseling Kelompok dengan Teknik Problem Solving dalam Mengurangi Perilaku Bullying pada Siswa?

Karina Aurella Ardiyanti — 2026-08-31

Bullying remains a common problem in schools, with verbal bullying being the most frequent form due to its tendency to be perceived as harmless joking among peers. Repeated behaviors such as teasing, mocking, insulting, and using offensive nicknames can cause significant psychological harm, highlighting the need for effective guidance and counseling interventions. This study aimed to describe verbal bullying behavior among students at SMA Negeri 1 Jekulo Kudus and examine the implementation of group counseling using problem-solving techniques to reduce such behavior. The counseling program was conducted in four stages: formation, transition, core activities, and termination. During the sessions, students learned to identify problems, generate and evaluate alternative solutions, and apply appropriate responses. The findings showed positive behavioral changes after the intervention, including increased awareness of the impact of verbal bullying, improved emotional regulation, greater empathy, and reduced teasing and offensive language. These results indicate that group counseling with problem-solving techniques is effective in reducing verbal bullying and promoting respectful communication among students.

Analisis Manajemen Seni Pertunjukan Saforia 2026 di SMA N 1 Brebes

Satrio Hendra Purnawan — 2026-08-31

SAFORIA (Smansa Euforia) is an annual program of the Student Council (OSIS) of SMA Negeri 1 Brebes held as part of the school anniversary celebration. SAFORIA 2026 consists of several series of activities, namely SMANSAFEST, SMANSA Fun Run, SMANSA Tujuh Belasan, Tasyakuran, and SAFORIA Day as the main performing arts event. This study aims to analyze the performing arts management of SAFORIA 2026 at SMA Negeri 1 Brebes based on Terry’s management functions, which include planning, organizing, actuating, and controlling (POAC), as well as Hasibuan’s 6M management elements, namely man, money, materials, machines, methods, and market. This study employed a descriptive method with a qualitative approach. Data were collected through observation, interviews, and documentation, while data validity was established through source and technique triangulation. The results show that SAFORIA 2026 was managed through the interconnected application of the POAC functions. Planning involved the development of objectives, programs, schedules, requirements, and budgets; organizing was implemented through the formation of teacher and student committees and the distribution of tasks based on functions and activity series; actuating was carried out through direction, coordination, communication, and mobilization of committee members; while controlling was conducted through monitoring plans, schedules, task distribution, and activity implementation. The application of these management functions was supported by the 6M elements and several supporting factors, including school support, committee cooperation, teacher and student involvement, external support, and the enthusiasm of participants and the community.

Pengaruh Sosial Media Marketing dan Brand Experience terhadap Revisit Intention, Brand Trust, dan Brand Loyalty pada Kopi Kenangan di Soloraya

Fajar Al Rahmatulloh — 2026-08-31

This study aims to analyze the effects of Social Media Marketing and Brand Experience on Revisit Intention, Brand Trust, and Brand Loyalty among Kopi Kenangan customers in Soloraya. A quantitative approach was employed using a survey method involving 200 respondents selected through purposive sampling. Data were collected using questionnaires and analyzed using Partial Least Squares-Structural Equation Modeling (PLS-SEM) with SmartPLS 3. The results indicate that Social Media Marketing has a positive and significant effect on Revisit Intention, Brand Trust, and Brand Loyalty. Brand Experience also has a positive and significant effect on Revisit Intention, Brand Trust, and Brand Loyalty. These findings suggest that effective Social Media Marketing activities and positive Brand Experiences enhance customers' intention to revisit, strengthen Brand Trust, and foster Brand Loyalty. This study provides practical implications for Kopi Kenangan in developing digital marketing strategies and creating better Brand Experiences to build long-term relationships with customers.

Strategi Komunikasi Pemasaran Airy School dalam Membangun Brand Image Sebagai Spesialis Dokumentasi Sekolah di Pasuruan

Chusnul Nisa — 2026-08-31

This study investigates the marketing communication strategies employed by Airy School in establishing its brand image as a specialized provider of school documentation services in Pasuruan. In a crowded creative industry dominated by general retail photography, many local educational institutions lack standardized, high-quality visual documentation due to fragmented project execution and limited market awareness. Building a clear specialized brand identity is therefore critical to earning institutional trust within bureaucratic school environments. Using a qualitative descriptive approach, data were gathered through in-depth interviews with Airy School's owner, marketing personnel, operational staff, and school clients, supplemented by field observations and document analysis. The analytical framework integrates Kotler and Keller's Marketing Communication Mix with Keller's Customer-Based Brand Equity (CBBE) model. The findings reveal that Airy School effectively executes an Integrated Marketing Communications (IMC) strategy, with personal selling serving as the most dominant and decisive channel to navigate school bureaucracies. Educational presentation tactics, value-driven all-in-one project structures, and interactive digital marketing successfully demonstrate perceived quality and operational reliability. Consequently, this approach constructs strong, favorable, and unique brand associations across the brand attribute, benefit, and attitude dimensions of the CBBE pyramid. This research underscores the importance of service specialization and consultative communication in transforming routine educational documentation into a strategic visual branding asset, offering a practical model for creative agencies operating in business-to-business regional markets.

Analisis Perbandingan Kekuatan Bending, Tarik, dan Fraktografi pada Material Komposit Serat Eceng Gondok, Serat Bambu serta Epoxy sebagai Pengganti Dashboard Mobil

Latif Firdaus — 2026-08-31

The development of the automotive industry has increased the demand for materials with lightweight characteristics, good mechanical properties, and environmentally friendly features. Natural fiber-based composite materials have become one of the potential alternatives to replace synthetic materials due to their lightweight, sustainable, and biodegradable characteristics for vehicle interior components, including car dashboards. This study aims to analyze the mechanical characteristics of hybrid composite materials reinforced with water hyacinth fiber and bamboo fiber using an epoxy matrix through bending, tensile, and fractographic analysis to evaluate their potential application as an alternative dashboard material. The research was conducted using an experimental method by fabricating composite specimens with a composition of 15% water hyacinth fiber, 15% bamboo fiber, and 70% epoxy resin. The fibers were subjected to alkali treatment using NaOH solution before the molding process. Mechanical testing was performed based on ASTM D790 for bending tests and ASTM D638 for tensile tests, while fractographic analysis was conducted on the fracture surfaces after mechanical testing. The results showed that the highest bending strength was obtained at 4.18 kg/mm² from a specimen with a thickness of 5.42 mm, while the highest tensile strength reached 1.79 kg/mm² from a specimen with a thickness of 6.24 mm. Fractographic observations revealed several failure mechanisms, including fiber pull-out, matrix cracking, void formation, delamination, and fiber fracture, which were influenced by the quality of the fiber–matrix bonding and the composite fabrication process. Based on the results, the hybrid composite of water hyacinth fiber and bamboo fiber reinforced with epoxy matrix has potential for development as an alternative material for car dashboard components; however, further optimization of fiber composition and manufacturing processes is required to improve its mechanical performance.

Penerapan Metode K-Means untuk Pengelompokan Data Obat Berdasarkan Tingkat Kebutuhan

Zikri Alhadi Adha — 2026-08-31

Abstract: This study aims to analyze and classify the level of drugdemand and provide drug procurement recommendations at UPT Puskesmas Air Tiris using the K-Means Clustering method. The main problem identified is that the drug demand analysisprocess is still conducted through data recapitulation, making it difficult to provide optimal information regarding drug demandlevels. The data used in this study were obtained from the DrugUsage and Request Report (LPLPO) for the period from January 2025 to January 2026, consisting of initial stock, receipts, inventory, usage, and remaining stock variables. The research methodology applies the Knowledge Discovery in Database (KDD) process, including data selection, preprocessing, transformation, data mining, and evaluation. The clustering process uses three clusters representing high, medium, and low demand levels. The results show that 309 drugrecords were successfully grouped into three clusters, consistingof 4 drugs in Cluster 1, 27 drugs in Cluster 2, and 278 drugs in Cluster 3. The clustering results were subsequently used as a basis for procurement recommendations by considering the average monthly demand, remaining stock, and a safety stock of 10%. The results indicate that the implementation of K-Meanscan assist in identifying drug demand levels and provideprocurement recommendation information as a reference for improving drug inventory management at Puskesmas Air Tiris.