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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Religio : Jurnal Studi Agama-agama Makara Journal of Technology
Rusmin, Pranoto Hidaya
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Religion Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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INTERPRETASI GLOBAL HADIS RUKYAT HILAL Rusmin, Pranoto Hidaya; Rohman, Arief Syaichu; Herdiwijaya, Dhani; Khaerani, Izzah Faizah Siti Rusydati; Pahlevi, Reza; Darmawan, Dadang
Mutawatir : Jurnal Keilmuan Tafsir Hadith Vol. 7 No. 1 (2017): JUNI
Publisher : Program Studi Perbandingan Agama, Fakultas Ushuluddin dan Filsafat, Universitas Islam Negeri (UIN) Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (619.584 KB) | DOI: 10.15642/mutawatir.2017.7.1.50-75

Abstract

Before Islamic Calendar begins, Muslims were used to wait for the earliest visible crescent (hilâl), which marks the beginning of Ramadan. The determination of the beginning of Ramadan is based on the rukyat al-hilâl hadith. Because the hilâl visibility on the earth surface is not the same, it results the differences on the beginning of Ramadan fasting. In addition, the sighting hilâl method can only determine the next 29 days, it cannot reach for the next month and even for the next year. These are the main reasons for re-interpretation of the rukyat al-hilâl hadith from global perspective. From this study, it is found that the context in the Qur?an, related to the Ramadan fasting, is fasting in one full month, 29 or 30 days, according to the duration of the lunar synodic cycle. However, the condition of the people and the science at that time has not developed yet, which is the cause of calculation (h}isâb) verses in the Qur?an cannot be used. When they have developed, the calculation verses in the Qur?an can be used to determine the number of days in a calendar month. This will produce a global calendar for mankind.
Internet Congestion Control System Rusmin, Pranoto Hidaya; Machbub, Carmadi; Harsoyo, Agung; Hendrawan, Hendrawan
Makara Journal of Technology Vol. 12, No. 1
Publisher : UI Scholars Hub

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Abstract

Internet Congestion Control System. Internet congestion occurs when resource demands exceeds the network capacity. But, it is not the only reason. Congestion can happen on some users because some others user has higher sending rate. Then some users with lower sending rate will experience congestion. This partial congestion is caused by inexactly feedback. At this moment congestion are solved by the involvement of two controlling mechanisms. These mechanisms are flow/congestion control in the TCP source and Active Queue Management (AQM) in the router. AQM will provide feedback to the source a kind of indication for the occurrence of the congestion in the router, whereas the source will adapt the sending rate appropriate with the feedback. These mechanisms are not enough to solve internet congestion problem completely. Therefore, this paper will explain internet congestion causes, weakness, and congestion control technique that researchers have been developed. To describe congestion system mechanisms and responses, the system will be simulated by Matlab.
Dynamic model and control strategies of battery-supercapacitor hybrid power sources for electric vehicles: a review Al Tahtawi, Adnan Rafi; Rohman, Arief Syaichu; Rusmin, Pranoto Hidaya; Rizqiawan, Arwindra
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 16, No 2: June 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v16.i2.pp695-709

Abstract

The addition of a supercapacitor to electric vehicles is considered beneficial for extending battery lifetime. Due to its higher power density compared to the battery, a supercapacitor can efficiently handle sudden high-current demands. However, to achieve energy efficiency, a specific control strategy is required for this battery-supercapacitor (Batt-SC) hybrid power source (HPS). This paper reviews the dynamic model of the Batt-SC as HPS for electric vehicles and explores its various control strategies in order to achieve energy efficiency. A high-fidelity model, a control-oriented model, and an integrated dynamic model are presented. Various control strategies are then discussed, including high-level control, low-level control, and DC bus voltage regulation. This paper also identifies several key research opportunities, such as developing an integrated dynamic model of a hybrid Batt-SC electric vehicle, combining high-level and low-level control into a unified control strategy, and designing an optimal-adaptive controller that can minimize a certain performance index by considering nonlinearity factors.
Co-Authors A.A. Ketut Agung Cahyawan W Agung Harsoyo, Agung Arief Syaichu Rohman, Arief Syaichu Arwindra Rizqiawan Carmadi Machbub Hendrawan Hendrawan Herdiwijaya, Dhani Khaerani, Izzah Faizah Siti Rusydati M. Rafi REZA PAHLEVI