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All Journal Journal of Geoscience, Engineering, Environment, and Technology Buletin Sumber Daya Geologi JURNAL AKADEMIK EKONOMI DAN MANAJEMEN
Dudi Hermawan
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Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Physics

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PENGARUH UPSKILLING DAN MOTIVASI KERJA TERHADAP PENINGKATAN KINERJA MANAJEMEN BILLING (Suatu Studi Pada PT PLN (Persero) Unit Layanan Pelanggan Ciamis Bagian Transaksi Energi Listrik) Dudi Hermawan; Faizal Haris Eko Prabowo; Enjang Nursolih
JURNAL AKADEMIK EKONOMI DAN MANAJEMEN Vol. 2 No. 3 (2025): JURNAL AKADEMIK EKONOMI DAN MANAJEMEN  September
Publisher : CV. KAMPUS AKADEMIK PUBLISING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61722/jaem.v2i3.5862

Abstract

This research is motivated by the suboptimal performance of employees at PT. PLN (Persero) ULP Ciamis which is caused by suboptimal upskilling and work motivation. The formulation of the problem in this study is: How do upskilling (job training) and work motivation influence billing management performance at PT. PLN (Persero) ULP Ciamis, both partially and simultaneously?? The method used in this study is a survey method with a quantitative approach. The population in this study is the billing management employees of PT. PLN (Persero) ULP Ciamis, namely 102 employees, the selected sample is 81 people. In this study, data collection was carried out through several techniques, namely literature studies, field studies and questionnaire distribution. The research results suggest the following conclusions: Upskilling has a positive and significant impact on the performance of billing management employees at PT PLN (Persero) ULP Ciamis, Electrical Energy Transaction Division. Work motivation has a positive and significant impact on the performance of billing management employees at PT PLN (Persero) ULP Ciamis, Electrical Energy Transaction Division. Upskilling and work motivation have a positive and significant impact on the performance of billing management employees at PT PLN (Persero) ULP Ciamis, Electrical Energy Transaction Division.
A NEW FRAMEWORK FOR CLASSIFICATION AND QUANTIFICATION OF GEOTHERMAL DIRECT USE RESOURCES AND RESERVES IN INDONESIA: KERANGKA KERJA BARU UNTUK KLASIFIKASI DAN KUANTIFIKASI SUMBER DAYA DAN CADANGAN PEMANFAATAN LANGSUNG PANAS BUMI DI INDONESIA Husin Setia Nugraha; Husin; Rina Wahyuningsih; Dudi Hermawan; Dikdik Risdianto
Buletin Sumber Daya Geologi Vol 20 No 2 (2025): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v20i2.447

Abstract

Geothermal direct use (GDU) in Indonesia holds significant potential for supporting energy security and local economic development, yet its growth has been hindered by the absence of technical standards for potential assessment. In contrast to the well-established indirect use for electricity generation, officially recorded GDU potential remains minimal. This study aims to establish and apply a standardized framework for the classification and quantification of GDU potential and utilization in Indonesia. The developed methodology introduces a potential classification system based on two primary criteria: the quality of fluid data/information and the results of a reserve feasibility study. The potential is categorized into two main classes: Resources (Indicated, Measured) and Reserves (Probable, Proven). Quantification formulas for potential (in MWt) and utilization (installed capacity, capacity factor, annual utilization, and capacity-to-reserve ratio) are also formulated. The initial implementation of this methodology reveals that Indonesia possesses a GDU potential of at least 230 MWt from 201 inventoried prospects, which constitutes approximately 56% of all identified prospects. Of this amount, approximately 8.1 MWt has been successfully classified as Proven Reserves. This standardized framework is expected to serve as a credible national reference for resource inventory, development planning, and attracting investment in the geothermal direct use sector.
The Water Chemistry Geothermal of Ranang-Kasimbar Hot Springs, Parigi Moutong Regency, Central Sulawesi, Indonesia Anna Yushantarti; Dudi Hermawan; Dwi Fitri Yudiantoro
Journal of Geoscience, Engineering, Environment, and Technology Vol. 11 No. 02 (2026): Article In Press-JGEET Vol 11 No 02 : June (2026)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Ranang-Kasimbar geothermal system in Central Sulawesi is located within the West Sulawesi Mandala, an area significantly influenced by the active tectonic zone of the Palu-Koro Fault that controls the emergence of surface manifestations. This study aims to characterize the water chemistry of the Ranang-Kasimbar hot springs through surface geological mapping and fluid geochemical analysis, which includes cation-anion analysis, stable 18O and 2H (D) isotopes, and geothermometer calculations for subsurface temperature estimation. The geological conditions of the study area are composed of Cretaceous-Eocene metamorphic rocks, Tertiary intrusive rocks, and Quaternary sedimentary rocks, with structural controls in the form of north-south trending strike-slip faults and a normal fault system that forms a central depression zone as controls for the emergence of manifestations. Field data identified hot springs with surface temperatures ranging from 55–61°C and alkaline pH (~9). Geochemical analysis results classify the geothermal fluid as a chloride type indicating a deep reservoir origin, with a Cl/B ratio indicating strong interaction with igneous rocks and partial equilibrium conditions. Isotope analysis indicates a dominant mixing with meteoric water with very low oxygen-18 enrichment. Reservoir temperature estimation using a Na-K geothermometer and a silica-enthalpy mixing model indicates a minimum temperature of 130°C, thus categorizing it as a medium enthalpy system. This geothermal system is controlled by secondary permeability from normal and strike-slip fault structures, with the heat source suspected to originate from residual heat from Plio-Pleistocene andesitic intrusions.
Co-Authors Anna Yushantarti Dikdik Risdianto Dwi Fitri Yudiantoro Enjang Nursolih Husin Husin Setia Nugraha Prabowo, Faizal Haris Eko RIna Wahyuningsih