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All Journal Elektrika Borneo Journal of Economics and Management Scienties Journal of Innovation in Teaching and Instructional Media
Wibowo, Eri
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Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Mathematics Social Sciences Other

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Analysis of School-Based Management and Principal Leadership in Improving Teacher Performance Sundari, Sundari; Suwito, Suwito; Wibowo, Eri
Journal of Innovation in Teaching and Instructional Media Vol 3 No 2 (2023): Journal of Innovation in Teaching and Instructional Media
Publisher : Yayasan Sembilan Pemuda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52690/jitim.v3i2.708

Abstract

This article discusses the general problem of low teacher performance in many schools in Indonesia, which can be seen from the school's consistently low qualitative average scores. The main goal of this article is to evaluate potential solutions to improve teacher effectiveness. The focus centers on two important aspects: the implementation of School Based Management (SBM) and the leadership style of the school principal. Identified challenges hindering teacher performance, including poor adaptation, lack of communication skills, and lack of openness to diverse opinions, will be examined. By using a descriptive analysis method with a qualitative approach, the author provides recommendations. The results of this article involve the implementation of a comprehensive principal leadership model that integrates visionary, democratic, and instructional elements, emphasizing support, collaboration, and commitment to ongoing professional development and motivation. The proposed model is expected to significantly improve teacher performance in schools in Indonesia.
Optimasi Strategi Supply Chain LPG Terminal Sekong dan Terminal Priok PT PP untuk Meningkatkan Efisiensi Operasional Penyaluran Bulk LPG di Wilayah Jawa Bagian Barat Wibowo, Eri; Sutrisno, Timotius FCW; Kodrat, David Sukardi; Andrina, A.A.A Puty
Journal of Economics and Management Scienties Volume 8 No. 1, December 2025 (Accepted)
Publisher : SAFE-Network

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37034/jems.v8i1.268

Abstract

Penelitian ini mengkaji optimasi pola distribusi Liquefied Petroleum Gas (LPG) antara Terminal LPG (TLPG) Sekong dan TLPG Priok di wilayah Jawa bagian Barat untuk meningkatkan efisiensi biaya dan ketahanan stok. Pendekatan dua tahap digunakan. Tahap pertama menerapkan heuristik Evolutionary Algorithm (EA) pada Microsoft Excel Solver guna menghasilkan solusi awal pembagian suplai yang feasible dan biaya rendah. Tahap kedua menggunakan Linear Programming (LP) di Visual Studio Code (VS Code) bahasa Python dengan pustaka PuLP dan pandas untuk memperoleh solusi optimal secara matematis dan melakukan validasi hasil EA. Data operasional tahun 2024–2025 mencakup volume demand SPBE, jarak, tarif distribusi, dan kapasitas terminal. Hasil menunjukkan terjadi redistribusi suplai dari TLPG Priok ke TLPG Sekong yang meningkatkan ketahanan stok TLPG Priok (>4 hari) dan menurunkan total biaya distribusi dibanding kondisi eksisting. Model LP memberikan biaya sedikit lebih rendah dibanding EA, menegaskan komplementaritas kedua pendekatan. Temuan ini menyoroti pentingnya alokasi dinamis, koordinasi antar-terminal, dan dukungan sistem pengambilan keputusan berbasis data untuk menjaga security of supply dan efisiensi operasional.
EVALUASI TEKNIS SISTEM FOTOVOLTAIK HIBRIDA OFF-GRID UNTUK SUBSTITUSI DAYA PEMAKAIAN SENDIRI PADA INSTALASI WTP PLTU MALINAU Arif, Muhammad; Wibowo, Eri; Nurdin, Muhammad Firdan
Elektrika Borneo Vol 11, No 2 (2025): Elektrika Borneo Edisi Oktober
Publisher : Jurusan Teknik Elektro, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/eb.v11i2.6829

Abstract

A standalone hybrid photovoltaic (PV) system integrated with lithium-ion battery storage was designed and evaluated to substitute the auxiliary power demand of the Water Treatment Plant (WTP) at the Malinau Coal-Fired Power Plant (2x3 MW), North Kalimantan, Indonesia. Through PVsyst 8.0 simulations utilizing local irradiance, load profile, and shading parameters, the system achieved an annual solar fraction of 94.3% and a performance ratio (PR) of 67.91%, delivering 120.13 MWh/year of useful energy. Battery round-trip efficiency reached 94.9%, indicating minimal energy loss during storage. These results demonstrate the system's technical viability for replacing fossil-based auxiliary energy in tropical industrial settings. Further implications include cost savings, emission reduction, and enhanced reliability. 
Co-Authors Andrina, A.A.A Puty David Sukardi Kodrat Muhammad Arif Nurdin, Muhammad Firdan Sundari Sundari Sutrisno, Timotius FCW Suwito Suwito