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All Journal Science and Technology Indonesia IJEMS (Indonesian Journal of Environmental Management and Sustainability)
Weny Herlina
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Decision Sciences, Operations Research & Management Energy Environmental Science Materials Science & Nanotechnology Physics Public Health

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Evaluation of Concatenation Planning of Crushing Plant Production System Using Analytic Hierarchy Process (AHP) Method at PT Buana Eltra Coal Processing Unit, South Sumatra Endarto Endarto; Restu Juniah; Weny Herlina
Indonesian Journal of Environmental Management and Sustainability Vol. 2 No. 1 (2018): March
Publisher : Research Centre of Inorganic Materials and Complexs

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (358.409 KB) | DOI: 10.26554/ijems.2018.2.1.1-6

Abstract

Coal processing activity conducted at the Coal Processing Unit (Stockpile) Martapura PT. Buana Eltra aims to reduce the size of coal to a smaller size in accordance with market demand of 5-10 cm. Processing is done with a combination of crushing plant and excavator called concatenation of production system. Concatentation of the current production system is a concatenation between Komatsu PC300 excavator and 10 cm roll crusher dimension which produces 145,6701 tons/hour and takes 20,59 hours and is considered inefficient and ineffective to reach production target of 3000 tons/day. Based on the above, it is necessary to evaluate the concatenation of crushing plant production system so that the processing process will be optimally. The method used in this concatenation evaluation is the Analytic Hierarchy Process (AHP) method. The alternative is the concatenation between, Komatsu PC200 excavator - 10 cm roll crusher dimension, Komatsu PC200 excavator - 5 cm roll crusher dimension and Komatsu PC300 excavator - 5 cm roll crusher dimension. The selection of these alternatives is based on qualitative data (criteria from experts) and quantitative data so as to produce optimal choice. Based on the evaluation and analysis of the two types of data then selected concatenation excavator Komatsu PC200 - dimension roll crusher 10 cm which has a productivity of 207,8468 tons/hour and the time required to reach 300 tons/day for 14.43 hours.
Improved Multi Service-Reverse Charging Models for the Multi Link Internet wireless Using QOS Bit Error Rate QoS Attribute Fitri Maya Puspita; Evi Yuliza; Weny Herlina; Yunita Yunita; Rohania Rohania
Science and Technology Indonesia Vol. 5 No. 1 (2020): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (944.584 KB) | DOI: 10.26554/sti.2020.5.1.6-13

Abstract

n this article, a multi-link internet reverse charging scheme model on a multi-service network isproposed. The previous research seldom discussed the reverse charging scheme on multi linkand multi service network. This pricing scheme is designed with the aim of maximizing serviceprovider profits. Basic costs and the level of service satisfaction provided by the ISP is focusedon this attempt. This optimization problem can be solved using LINGO 13.0 software. Thisproblem was made and was divided into several cases. Thus, the results obtained can be aconsideration for ISPs in determining the price of services that can support an ISP. The improvedmodels that produce the maximum solution is case 3 (α and β as variables) and case 4 (α asvariables and β as parameters).
Co-Authors Endarto Endarto Evi Yuliza, Evi Fitri Maya Puspita Restu Juniah Rohania Rohania Yunita Yunita