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All Journal ETNIK : Jurnal Ekonomi dan Teknik Journal of Computing and Informatics Research
Lasiyono, M. Munawir
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Pengembangan Sistem Pakar Diagnosis Jenis Stres Menggunakan Pendekatan Dempster-Shafer Theory Sah, Andrian; Heriyani, Nofitri; Jafar Rumandan, Rhaishudin; Lasiyono, M. Munawir
Journal of Computing and Informatics Research Vol 4 No 2 (2025): March 2025
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/comforch.v4i2.1941

Abstract

Stress is a psychological issue commonly experienced in society and can develop into more serious disorders if not properly addressed. However, access to professional services remains limited due to constraints such as time, cost, and unequal distribution of mental health professionals. Therefore, the objective of this study is to develop an expert system using a web-based Dempster-Shafer Theory (DST) approach capable of diagnosing stress types based on user-reported symptoms. DST enables the integration of various pieces of evidence to produce conclusions with measurable confidence levels. The system is equipped with functionality for managing symptom data, stress types, and the ability to provide diagnostic results accompanied by recommended solutions. Testing results demonstrated an accuracy level of 93.33%, placing this system in the "Good" category according to standard performance evaluation classifications. The implementation of DST has proven effective in managing data uncertainty and supporting confidence-based decision-making. This research contributes to the development of DST-based diagnostic technology that can be widely accessed via a web platform, providing a reliable alternative for early detection of stress types.
Setting Relai Differensial Pada Transformator Daya 150kv Gardu Induk Pondok Indah Menggunakan Protocol Communications Modbus Lasiyono, M. Munawir
Jurnal Etnik: Ekonomi-Teknik Vol 1 No 3 (2021): ETNIK : Jurnal Ekonomi dan Teknik
Publisher : Rifa'Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54543/etnik.v1i3.25

Abstract

Transformers in power systems require different types of protection.This protection is provided by various types of relays, bothelectromagnetic and static. In general, transformer protection servesto protect the transformer in the event of a disturbance, so that thetransformer can be avoided from damage. The relay that will be usedto protect the transformer is a differential relay. This relay workswhen there is a difference in the current of the Current Transformer[CT] on the primary and secondary sides. If the fault occurs outsidethe protection zone, the relay will not work. The method used in thisresearch is R&D (Research and Development), namely research anddevelopment methods, research and development methods areresearch methods used to produce certain products, and test theeffectiveness of these products. An evaluation of the differentialrelay setting on a 150kV power transformer has been carried out atthe Pondok Indah Substation using the Modbus CommunicationsProtocol, where the settings in the field and from the results ofcalculations using the Micom 632 differential relay are obtained: forthe calculation results of Idiff = 0.39 and Idiff max = 8.07 while theactual setting in the field is Idiff = 0.3 and Idiff max = 8. Thedifference in value between the actual setting and the calculationresults is Idiff by 30%, and Idiff max 0.87% is still within theallowed interval . Setting using the modbus communicationsprotocol has advantages, including reducing wiring, makingtroubleshooting or interference easier, reducing the possibility ofhuman-error errors in the configuration process, and making it easyto make changes.
Co-Authors Heriyani, Nofitri Jafar Rumandan, Rhaishudin Sah, Andrian