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All Journal Jurnal MIPA PHARMACON CHEMISTRY PROGRESS JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI JURNAL PENDIDIKAN TAMBUSAI PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Formosa Journal of Applied Sciences (FJAS) Informatics and Software Engineering (ISE) Jurnal Lentera: Penelitian dan Pengabdian Masyarakat Jurnal Ilmiah Inovasi dan Komunikasi Pembangunan Pertanian Teknik: Jurnal Teknik Mesin, Elektro dan Ilmu Komputer
Jumriadi
Universitas Sam Ratulangi
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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Entropy vs. CRITIC Weighting for TOPSIS Ranking of Mobile Data Packages in Ambon City Vederico Pitsalitz Sabandar; Sanriomi Sintaro; Wisard Widsli Kalengkongan; Jumriadi; Sitti Nur Isnian
Informatics and Software Engineering Vol. 3 No. 2 (2025): December
Publisher : SAN Scientific

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58777/ise.v3i2.575

Abstract

This study proposes a decision-support approach for selecting prepaid mobile data packages in Ambon City that balances price, main quota, and validity period. Twelve packages from Telkomsel, XL, Indosat IM3, and Tri were evaluated using four criteria: price, main quota, validity, and price per main gigabyte. TOPSIS was used for ranking, and Entropy and CRITIC were compared as objective weighting methods to examine the effect of weighting choice. Entropy emphasized the main quota, producing a quota-focused evaluation. CRITIC gave greater weight to price and price efficiency, accounting for data variation and criterion correlations. Both methods selected Tri Happy 70GB as the best option. The overall rankings were highly consistent, with a Spearman rank correlation of 0.8741, although some alternatives changed positions within the top group. The analysis is limited to a single time snapshot based on published package attributes and excludes measured network performance in Ambon City. In practice, the framework is transparent, replicable, and can be extended with constraints such as maximum budget and minimum validity requirements. The study contributes a controlled comparison of Entropy and CRITIC effects while keeping TOPSIS constant.
Pelatihan Sistem Pertanian Cerdas Berbasis Internet of Things di Desa Kaasar, Minahasa Utara: Training on Internet of Things-Based Smart Farming System in Kaasar Village, North Minahasa Andi Ikhtiar Bakti; As'ari As'ari; Afrioni Roma Rio; Jumriadi Jumriadi; Rachma Rahim
PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 11 No. 7 (2026): PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/pengabdianmu.v11i7.11540

Abstract

The smart farming system training based on the Internet of Things (IoT) in Kaasar Village, North Minahasa, North Sulawesi, successfully enhanced farmers' understanding and skills in operating smart farming technology. The pre-test results indicated that 80% of participants were unfamiliar with the technology, but after the training, 90% demonstrated a good understanding of how to use the system. Additionally, the training on business strategy and digital marketing improved farmers' skills in promoting their products through Google Business and social media. However, some challenges were encountered, such as the limited number of devices available, which required participants to take turns using them. This program has had a significant positive impact on the sustainability of agricultural businesses in Kaasar Village, although some technical aspects need improvement to enhance the effectiveness of future training sessions.
STUDI NUMERIK KOMPARASI MODEL GEOMETRI ABSORBER TERHADAP KINERJA TERMAL SISTEM PENGERING PASCAPANEN Jumriadi, Jumriadi; Isnian, Sitti Nur
Jurnal Ilmiah Inovasi dan Komunikasi Pembangunan Pertanian Vol. 5 No. 3 (2026)
Publisher : Department of Agricultural Extension, Faculty of Agriculture, Halu Oleo University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56189/jiikpp.v5i3.93

Abstract

Solar-based post-harvest drying is a sustainable solution to improve the quality and shelf life of agricultural products in tropical regions. The thermal performance of solar drying systems is strongly influenced by the absorber geometry as the main heat-absorbing component. This study aims to analyze the effect of absorber geometry variation on the thermal performance of a solar collector for post-harvest drying applications. A numerical approach based on Computational Fluid Dynamics (CFD) was employed using ANSYS Fluent under steady-state airflow conditions and uniform heat flux. Three copper absorber configurations were investigated: flat plate, 6-fin absorber, and 12-fin absorber. The evaluated parameters include temperature distribution, outlet air temperature, and inlet pressure. The results indicate that finned absorbers significantly enhance outlet air temperature compared to the flat-plate configuration, with the 12-fin absorber providing the highest thermal performance at the expense of increased pressure drop. These findings highlight a trade-off between thermal enhancement and airflow resistance. The study implies that absorber geometry optimization is an effective strategy to improve solar collector performance for post-harvest drying systems.
Studi Numerik Aliran Fluida pada Elbow 90° dengan Variasi Geometri dan Bukaan Katup Menggunakan CFD Fluent Jumriadi Jumriadi; Sitti Nur Isnian
Jurnal Teknik Mesin, Elektro dan Ilmu Komputer Vol. 5 No. 2 (2025): Juli : Jurnal Teknik Mesin, Elektro dan Ilmu Komputer
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/teknik.v5i2.7177

Abstract

Piping systems are critical components across various industrial sectors, including agriculture. The 90° elbow plays a key role in directing fluid flow; however, abrupt changes in flow direction within the elbow often lead to pressure losses and vortex formation, particularly in configurations with small curvature radii. This study aims to analyze the fluid flow characteristics within a 90° elbow under different curvature radii (extreme, R30 mm, and R50 mm) and various valve opening conditions, using numerical simulation based on Computational Fluid Dynamics (CFD) in ANSYS Fluent 2019 R3. The simulation results show that increasing the curvature radius leads to a more uniform pressure distribution along the bend and a reduction in vortex formation. Although larger valve openings increase flow velocity and Reynolds number, the pressure and velocity contours do not exhibit significant changes in flow patterns. This study confirms that elbow geometry design greatly influences the hydrodynamic efficiency of piping systems and can help minimize the risk of damage due to uneven pressure distribution
Co-Authors Afrioni Roma Rio As'ari As'ari Bakti, Andi Ikhtiar Chelinda Tumundo Defny Silvia Wewengkang Ernawatil Gani, Ernawatil Handy I. R. Mosey Handy Indra Regain Mosey Hariyanto, Yuanita Amalia Hesky Stevy Kolibu Isnian, Sitti Nur Luther Sonda Mahendra Kusuma Nugraha Marco Alfiano Laoh Megastin M. Lumembang Muhammad Rusdi Rachma Rahim Rahmat, Agi Sugi Roni Koneri Salsabila, Unik Hanifah Sanriomi Sintaro Sitti Nur Isnian Vederico Pitsalitz Sabandar Verna A. Suoth Wahab, Fajar Islam Wisard Widsli Kalengkongan Yuniar Alam