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All Journal Bulletin of Electrical Engineering and Informatics Kalbisocio: Jurnal Bisnis dan Komunikasi
Putranto, Dwi
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Humanities Economics, Econometrics & Finance Electrical & Electronics Engineering Languange, Linguistic, Communication & Media Social Sciences

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Analisa Efektivitas Waktu Penerapan Metode NSC dan SBO Pada Proyek Renovasi Interior Retail di STAR Department Store Summarecon Bekasi Putranto, Dwi; Putra, Bramanta Octa Danu
KALBISOCIO Jurnal Bisnis dan Komunikasi Vol. 12 No. 3 (2025): KALBISOCIO Jurnal Bisnis dan Komunikasi
Publisher : Research and Community Service UNIVERSITAS KALBIS

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Abstract

This research aims to provide education in the analysis process to understand the effectiveness of package classification in the implementation of retail business interior project, namely, Star Department Store. By making a short conctact approach through the Nominated Subcontractor (NSC) and Supply by Owner (SBO) contract. Both contracting methods cane have a very significant impact on project completion, which can result in time efficiency, leading to quality outcomes. The NSC method can provide appropriate directions from subcontractors to complete specific tasks according to established requirement. The SBO method can give project owners the opportunity to manage the procurement of materials or equipment directly in implementing the retail business interior project. This research can provide comprehensive information on the structutured work package classification that can enhance project effectiveness throught both the contracts. The research approach used is a case study with qualitative analysis on several retail business interior projects that use NSC and SBO contracts. The results of this study can show the role of conducting a clear classification of interior design management project work packages carried out with proper management based on NSC or SBO contracts can improve cost efficiency, quality, and time for completing the STAR Department Store retail business interior renovation project.
Effect of gamma radiation on semi-crystalline polyvinyl chloride polymer for low-voltage cable insulator Hutagaol, Antonio Gogo; Bayquni, Muhammad Ilham; Setiawan, Jan; Putranto, Dwi; Sudjadi, Usman; Sungkono, Sungkono; Kriswarini, Rosika; Masrukan, Masrukan; Yunus, Muhamad Yasin
Bulletin of Electrical Engineering and Informatics Vol 14, No 2: April 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v14i2.7940

Abstract

This study explores the properties of semi-crystalline polyvinyl chloride (PVC) polymer as insulation material for low-voltage (LV) cables under high gamma radiation exposure. Test samples underwent gamma radiation (60Co) at doses of 25, 50, 100, 200, 400, and 800 kGy. The evaluation encompassed surface morphology, electrical conductivity, thermal characteristics, and mechanical properties via tensile tests. Electron microscopy observation indicated surface smoothing and flattening occurred at an irradiation dose of 800 kGy. Gamma radiation with increasing doses results in similar thermogram profiles with slight differences in melting temperature and residue mass. The sample irradiated at a gamma dose of 25 kGy generates an increase in the percentage of crystallinity, indicating the occurrence of crosslinking, while other doses exhibit a decrease of crystallinity with increasing radiation dose. Tensile stress significantly dropped up to 400 kGy but increased at 800 kGy. Elongation at break (EAB) decreased with higher gamma radiation doses. Overall, materials up to 800 kGy remained non-brittle, serving as effective insulators and demonstrating thermal stability within high gamma radiation exposure conditions.
Co-Authors Bayquni, Bayquni Hutagaol, Antonio Gogo Jan Setiawan Masrukan Masrukan Putra, Bramanta Octa Danu Rosika Kriswarini Sungkono Sungkono Usman Sudjadi Yunus, Muhamad Yasin