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All Journal Dimas: Jurnal Pemikiran Agama untuk Pemberdayaan Infotekmesin Electrician : Jurnal Rekayasa dan Teknologi Elektro
Putri Hapsari, Jenny
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Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Mechanical Engineering Social Sciences Other

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Analisa Efektivitas Pemasangan Multirod-Grounding pada SUTET 500kV Mandirancan-Pemalang Line 3&4 dengan Metode Paired Sample T-Test Ghani, Reza Muhammad; Putri Hapsari, Jenny
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 19 No. 2 (2025)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v19n2.2910

Abstract

Abstract — PLN's customer growth continues to increase every year, with an average increase of 5.26% from 2014 to 2023. Reliability is needed in the 500kV Mandirancan-Pemalang line 3 & 4 SUTET transmission system which distributes electricity from the Batang PLTU and Tanjungjati PLTU. Throughout 2022 and 2023, there were 5 reclose disturbances caused by lightning on the SUTET in the ULTG Tegal. Efforts to prevent lightning disturbances are to reduce the tower grounding resistance value. The method used is to add several grounding rods (Multirod Grounding/MRG) to each tower leg that is struck by lightning and other towers next to it, in front (5 towers) and behind (5 towers). So that it is hoped that the lightning current can be quickly channeled to the ground. The data analysis method used is the paired sample t-test by processing data from grounding resistance measurements on 53 SUTET towers before and after the installation of MRG. Data processing is done using the Data Analysis feature in Microsoft Excel. Based on field measurements, the average grounding resistance value before and after the installation of MRG is 3.75 Ω and 1.33 Ω. Based on data analysis using the Paired Sample T Test method, obtained tcount (tstat)>ttable (tcritical one-tail) with a value of 7.29>2.34 and the P-value (P(T<=t) one-tail)<α(alpha) with a value of 2.97888×10−12<0.01. From these results, the null hypothesis is rejected and the alternative hypothesis is accepted that there is a very significant difference between the grounding resistance of the tower before and after the installation of MRG, so that the installation of MRG is statistically effective. Based on the 2024 disturbance data, there was no disturbance caused by lightning on this SUTET transmission, so that the installation of MRG had an effect on reducing the frequency of lightning disturbances on this SUTET. Keywords — grounding resistance, multirod grounding (MRG), paired sample t-test
Analisa Unjuk Kerja Software Defined Radio (SDR) dengan Teknik Quadrature Amplitude Modulation (QAM) Putri Hapsari, Jenny; Ismail, Munaf
Infotekmesin Vol 12 No 2 (2021): Infotekmesin: Juli 2021
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v12i2.726

Abstract

The development of wireless communication technology require technology (software and hardware) that can keep up with changing standards. SDR platform is a software-based wireless technology that can keep up with technological developments without changing hardware. WARP is one of SDR platforms developed by American Rice University. This research to determine the performance of the SDR with the QAM technique. The performance system can be seen from BER for different distance between transmitter and receiver and different level QAM. The research was carried in two enviroment (indoor and outdoor) with LOS propagation. The results show that the value of BER 4-QAM in the two enviroment is the smallest than another levels. Thevalue of BER 4-QAM at indoor is 0.0023 and outdoors is 0 for a distance of 6 meters, so the performance of outdoor is better than indoor. SDR performance can be improved using QAM techniques.
Integration of Smart Rainwater Harvesting and Islamic Ecological Ethics: IoT-Based Community Empowerment in a Coastal Area of Demak Putri Hapsari, Jenny; Karmilah, Mila; Madrah, Muna Yastuti; Setiawan, Candra; Naufal, Zaky; Lailatul Fitriyah, Anis; Nurchasanah, Jeni; Ilma Mustafidah, Dewi; Najib Mafaza, Ahmad; Kukuh Agusta, Andi
Dimas: Jurnal Pemikiran Agama untuk Pemberdayaan Vol. 25 No. 2 (2025)
Publisher : LP2M of Institute for Research and Community Services - UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/dms.v25i2.29198

Abstract

The northern coastal area of Demak, particularly Timbulsloko Hamlet, faces a severe clean water crisis due to tidal flooding, seawater intrusion, and land subsidence. Conventional rainwater harvesting (RWH) efforts initiated by local residents have been unable to sustainably meet household needs because of limited capacity and the absence of adequate filtration systems. This community service program aims to develop an IoT-based Smart Rainwater Harvesting (Smart-RWH) system as an adaptive, affordable, and community-driven solution. The implementation methods included community outreach, training on RWH management and maintenance, installation of a Smart-RWH system equipped with water quality sensors, and trial use of a simple Android-based monitoring application. The results indicate the successful installation of a 6,000-litre Smart-RWH unit with pH and volume sensors, the development of an operational manual, and improved community capacity in managing clean water using technology. The implications extend beyond increased access to safe water, as the program also strengthens socio-ecological resilience through local institutional empowerment and collective action. The Smart-RWH model offers significant potential for replication in other coastal areas facing similar challenges.
Co-Authors Candra Setiawan Ghani, Reza Muhammad Ilma Mustafidah, Dewi Kukuh Agusta, Andi Lailatul Fitriyah, Anis Madrah, Muna Yastuti Mila Karmilah Munaf Ismail, Munaf Najib Mafaza, Ahmad Naufal, Zaky Nurchasanah, Jeni