This study investigated the performance optimization of photovoltaic system (PV) systems installed on an ellipsoidal rooftop at the Politeknik Balikpapan Building, addressing the unique challenges posed by curved surfaces, such as uneven irradiance distribution and shading effects. This research aims to evaluate and compare the performance of monocrystalline and polycrystalline PV modules using Helioscope software, with a focus on two key metrics: Performance Ratio (PR) and Energy Density Ratio (EDR). Simulations were conducted by segmenting the rooftop into distinct areas based on azimuth angles, allowing a detailed analysis of the shading impact. The results showed that monocrystalline PV modules achieved a PR of 71.5
Transformasi pendidikan pada era globalisasi dan digitalisasi menuntut organisasi pendidikan memiliki tata kelola yang adaptif tanpa kehilangan relevansi sosial dan identitas budaya. Namun, praktik manajemen pendidikan di Indonesia masih didominasi pendekatan administratif dan teknokratis yang cenderung mengabaikan dimensi nilai serta konteks sosial-budaya masyarakat. Artikel ini bertujuan mengonstruksi strategi pengelolaan organisasi pendidikan berbasis kearifan budaya Nusantara sebagai alternatif kerangka tata kelola yang kontekstual, partisipatif, dan berkelanjutan. Penelitian menggunakan pendekatan kualitatif dengan metode studi kepustakaan (library research). Analisis dilakukan melalui content analysis dengan tahapan identifikasi, kategorisasi, interpretasi, dan sintesis tematik. Hasil kajian menunjukkan bahwa nilai-nilai kearifan budaya Nusantara, yaitu gotong royong, musyawarah, kebersamaan, tanggung jawab sosial, dan penghormatan terhadap keberagaman, memiliki relevansi sebagai fondasi pengelolaan organisasi pendidikan. Nilai-nilai tersebut terintegrasi dalam enam dimensi strategis, yaitu perencanaan partisipatif, kepemimpinan berbasis budaya, pengembangan sumber daya manusia kolaboratif, penguatan budaya organisasi, kolaborasi pemangku kepentingan, dan transformasi digital beridentitas kultural. Kajian ini menghasilkan model konseptual pengelolaan organisasi pendidikan yang berorientasi pada pembentukan institusi yang adaptif, berkarakter, inklusif, dan berkelanjutan. Hal ini dapat memperkaya diskursus manajemen pendidikan melalui penguatan perspektif budaya sebagai landasan tata kelola yang relevan dengan konteks Indonesia.
Indonesia’s Teacher Mobilizer Education Program (Program Pendidikan Guru Penggerak/PPGP) was designed to strengthen instructional leadership and accelerate school transformation, yet evidence of its outcomes across Kirkpatrick’s Four-Level Evaluation Model remains limited in Eastern Indonesia. This study evaluated reaction, learning, behavior, and results among PPGP participants in four public senior high schools in Makassar City. A qualitative evaluation design involved 16 purposively selected informants: Teacher Mobilizers, principals, peer teachers, and students. Data were generated through semi-structured interviews and document analysis of learning portfolios, mentoring reports, reflective journals, and school development documents. Data were analyzed using the Miles and Huberman interactive model and thematic coding based on the four Kirkpatrick levels. Credibility was supported through triangulation, member checking, and documentary verification. Participants reported positive reactions to the relevance of program content, facilitator support, mentoring, and collaborative learning. The program strengthened pedagogical knowledge, differentiated instruction, coaching, reflective practice, and instructional leadership. Behavioral outcomes included more student-centered teaching, restorative classroom management, peer collaboration, and active participation in school-improvement initiatives. At the organizational level, the program supported stronger professional learning communities, improved teacher collaboration, and greater student engagement. These findings indicate that PPGP can facilitate the transfer of professional learning into classroom and school-level practice. However, the qualitative design and limited number of schools constrain generalizability. Longitudinal mixed-method research is needed to assess sustained effects on teacher performance and student learning outcomes.
Introduction: Water hardness caused by high concentrations of calcium carbonate is a persistent problem in many groundwater-dependent communities, including Palu City, Central Sulawesi, Indonesia. Excessive hardness reduces water acceptability, increases household maintenance costs, and contributes to scaling in pipes and storage systems. This study aimed to evaluate the effectiveness of two locally available organic-waste materials—durian peel charcoal and coconut shell charcoal—as low-cost biofilter media for reducing calcium carbonate concentrations in household well water. Method: A laboratory-based experimental design was applied using batch adsorption methods. Groundwater samples with an initial calcium carbonate concentration of 568 milligrams per litre were treated with varying masses of each adsorbent and different contact times. The study examined combinations of adsorbent mass and exposure time to determine optimal operating conditions. Calcium carbonate levels before and after treatment were measured using standard titration techniques to assess removal efficiency. Results: The results demonstrated that both organic-waste biofilters were capable of substantially lowering hardness levels. Durian peel charcoal achieved its best performance at a moderate adsorbent mass and short contact time, showing rapid adsorption kinetics and high affinity for hardness-related ions. Coconut shell charcoal also produced significant reductions but required greater mass and longer contact time to reach optimal effectiveness. The findings confirmed that adsorption performance was nonlinear and strongly influenced by operational parameters, material characteristics, and initial contaminant concentration. Comparison of the two media indicated that each possesses distinct advantages, highlighting the importance of context-specific optimisation for practical application. Conclusion: Overall, the study shows that transforming locally abundant agricultural wastes into biofilter media offers a feasible and affordable strategy for decentralised water treatment. The research contributes new comparative evidence on the use of durian peel and coconut shell charcoal for hardness reduction and supports their potential use in household-scale systems. If validated under field conditions, these findings may support the development of affordable household-scale strategies for improving the acceptability of drinking water in resource-limited communities.
Kajian literatur ini menganalisis karakteristik mutu kopi arabika ateng super dan metode pengolahan pascapanen sebagai salah satu varietas utama di Dataran Tinggi Gayo. Penelitian ini bertujuan untuk mensintesis temuan terkait sifat fisik, kimia, dan sensori, serta mengevaluasi pengaruh teknik pengolahan terhadap kualitas seduhan akhir. Hasil kajian menunjukkan bahwa biji Ateng Super memiliki ukuran yang seragam dan densitas tinggi, dengan komposisi kimia yang seimbang, kandungan kafein moderat, asam klorogenat sebesar 5–7%, serta kandungan sukrosa yang relatif tinggi yang mendukung pembentukan kemanisan, body, dan kompleksitas aroma. Karakteristik sensori yang dominan meliputi aroma floral–herbal, kemanisan seimbang, body sedang hingga penuh, keasaman rendah hingga sedang, serta aftertaste yang bersih. Analisis komparatif menunjukkan bahwa metode full washed meningkatkan kejernihan rasa dan keasaman, sedangkan metode semi-washed menghasilkan kemanisan yang lebih tinggi dan body yang lebih kuat. Temuan ini menegaskan pentingnya standarisasi proses pascapanen dan pengendalian penyangraian secara presisi untuk menjaga konsistensi mutu. Penelitian lanjutan yang mengintegrasikan parameter fisik, kimia, dan sensori direkomendasikan untuk mengoptimalkan kualitas kopi Arabika Ateng Super.
