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All Journal International Journal of Public Health Science (IJPHS) Jurnal SPEKTRUM INDONESIAN JOURNAL OF BIOMEDICAL SCIENCES Journal of Electrical, Electronics and Informatics Jurnal Media dan Teknologi Pendidikan
I Ketut Wijaya
Universitas Udayana
Computer Science & IT Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Medicine & Pharmacology Social Sciences

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ANALISIS KEANDALAN PADA PENYULANG BATU BELIG Fahmi Ramadhan; Rukmi Sari Hartati; I Ketut Wijaya
Jurnal SPEKTRUM Vol 2 No 2 (2015): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (242.209 KB)

Abstract

Penyulang Batu Belig jaringan memiliki cakupan wilayah yang cukup panjang dan padat sehingga mengakibatkan nilai keandalan jaringan relatif kurang baik, hal itu dapat dilihat dari nilai SAIDI penyulang Batu Belig yaitu 4,0194 h/customer/yr. Keandalan dapat ditingkatkan dengan merekonfigurasi jaringan. Rekonfigurasi jaringan menggunakan 2 alternatif skenario, skenario 1 upaya untuk menentukan dan menambahkan sectionalizer sehingga diperoleh keandalan yang lebih baik. Skenario 2 yaitu membangun penyulang baru di Jalan Peti Tenget yang bersumber dari Gardu Induk Padang Sambian Trafo 2, kemudian menentukan lokasi dibangunnya penyulang baru berdasarkan pembagian beban, setelah itu menentukan jenis kabel yang baik untuk meningkatkan keandalan. Hasil analisis menunjukkan bahwa penempatan sectionalizer yang tepat dan memperoleh indeks keandalan yang memenuhi syarat World Class Service. Skenario 1, didapat 2 titik terbaik berdasarkan perhitungan di lokasi 1 yaitu di Jalan Peti Tenget pada Gardu Distribusi nomor KA2276 dan lokasi 2 yaitu Jalan Peti Tenget pada Gardu Distribusi nomor KA2593. Skenario 2, setelah membangun penyulang baru keandalan penyulang Batu Belig membaik, nilai SAIDI menjadi 0,5501 jam/tahun/pelanggan dan SAIFI sebesar 1,2510 kali/tahun/pelanggan.
Design of Liquid Waste Aerator Control Based on Fuzzy Logic I Made Mataram; I Ketut Wijaya
Journal of Electrical, Electronics and Informatics Vol 3 No 2 (2019): JEEI (August 2019)
Publisher : Institute for Research and Community Services Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JEEI.2019.v03.i02.p04

Abstract

Abstrak - Liquid waste is the result of liquid production which is no longer used, so it must be processed and managed so as not to cause pollution and decrease in environmental quality. The biological wastewater treatment system can use the services of decomposing bacteria. This performance is greatly influenced by several factors, including the amount of waste water, the level of impurities, the availability of oxygen (O2), the type of dirt and so on. Parameters used as standard control of BOD and COD liquid waste standards meet the standards. An aerator in the form of an air pump is used to disperse high-pressure air in liquid waste containing oxygen in the process of aeration effluence, so that when air rises to the surface of the water oxygen binding will occur. The operation of the aerator is generally done manually, so that there is a waste of use of electrical energy. This paper discusses the design of an aerator operating control system on waste quality standards using one input fuzzy logic controller and one output. The main component of the hardware is the Uno type Arduino microcontroller used, with the sensor input in the form of COD and output in the form of long working hours of the aerator. The results obtained indicate that the control device is able to reduce the use of electrical energy by 31.03% and can work well based on the value of small deviations and controls capable of working at a set point of 6-10 hours.
Modelling Fuzzy Logic Type-2 for Liquid Waste Control of Aerator Machine I Made Mataram; I Ketut Wijaya
Journal of Electrical, Electronics and Informatics Vol 6 No 1 (2022): JEEI (December 2022)
Publisher : Institute for Research and Community Services Udayana University

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Abstract

Liquid waste cannot be disposed of directly, so it must be processed so as not to cause pollution to the surrounding environment. Both BOD (Biological Oxygen Demand) and COD (Chemical Oxygen Demand) treatment, oxygen is also required so that the quality of the liquid waste is safe for the environment. Liquid waste treatment mostly utilizes aerators to produce high pressure air in liquid waste containing oxygen (O2). The problem that occurs in most wastewater treatment is the determination of the working time of the aerator, resulting in excessive use of electrical energy, but the results of the waste are still within unsafe limits. In general, the operating time of the aerator is manually, this causes the use of electrical energy to be wasteful. This research was conducted, how to develop a control system design for aerator operating time on the quality of liquid waste. The development of the control system used is Sugeno interval fuzzy logic type-2 with 2 (two) input types of Gauss membership function. The advantage of interval fuzzy logic type-2 over type-1 fuzzy logic is the ability to provide more accurate output for higher input uncertainty. The input variables used are waste volume and COD reduction, while the output is the aerator's operating time. The results obtained in the system design can be applied properly and in accordance with the setting point with an average aerator operating time of 6.8 hours and can reduce the use of electrical energy by 38.2%.
Model Case Based Learning Berbantuan Video Kontekstual terhadap Kemampuan Literasi Sains dan Keterampilan Berpikir Kreatif dalam Pembelajaran Fisika Wijaya, I Ketut; Santyasa, I Wayan; Parwati, Ni Nyoman
Jurnal Media dan Teknologi Pendidikan Vol. 4 No. 2 (2024): April
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jmt.v4i2.79930

Abstract

Penelitian ini dilatarbelakangi oleh hasil PISA dan TIMSS yang menunjukkan bahwa kemampuan literasi sains dan kemampuan pemecahan masalah dalam bidang sains masih rendah. Tujuan penelitian ini adalah untuk mendeskripsikan perbedaan pengaruh model case based learning berbantuan video kontekstual terhadap kemampuan literasi sains dan keterampilan berpikir kreatif siswa dalam pembelajaran fisika kelas XI SMA. Penelitian ini merupakan penelitian eksperimen semu dengan rancangan non equivalent pretest-posttest control group design. Populasi penelitian sebanyak 167 peserta didik, dengan sampel sebanyak 102 peserta didik yang ditetapkan dengan teknik simple random sampling. Data kemampuan literasi sains dan keterampilan berpikir kreatif fisika dikumpulkan dengan tes essay. Analisis data menggunakan uji statistik Multivariat Analysis of Covarian (MANCOVA) satu jalur. Pengujian hipotesis menggunakan taraf signifikansi 5%. Hasil penelitian menunjukkan bahwa (1) terdapat perbedaan kemampuan literasi sains dan keterampilan berpikir kreatif fisika secara bersama-sama antara kelompok model case based learning berbantuan video kontekstual, model case based learning dan model direct instruction; (2) terdapat perbedaan kemampuan literasi sains fisika dan keterampilan berpikir kreatif antara kelompok model case based learning berbantuan video kontekstual, model case based learning dan model direct instruction. Sehingga dapat disimpulkan bahwa model case based learning berbantuan video kontekstual secara signifikan berpengaruh terhadap kemampuan literasi sains dan keterampilan berpikir kreatif dalam pembelajaran fisika kelas XI SMA.
KONTROL FREKUENSI BEBAN MENGGUNAKAN METODE ADAPTIVE NEURO FUZZY INFERENCE SYSTEM (ANFIS) PADA SISTEM HYBRID WIND MIKROHIDRO DAN DIESEL Febryanto Simorangkir, Walter Willy Metyu; Mataram, I Made; Wijaya, I Ketut
Jurnal SPEKTRUM Vol 10 No 4 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i04.p38

Abstract

This study aims to analyze and compare the performance of three frequency load controller methods in a hybrid generator consisting of three types of energy generation, namely microhydro, diesel and wind. The controller methods being compared are the PID (Proportional Integral Derivative) method, ANFIS (Adaptive Neuro-Fuzzy Inference System), and Fuzzy. This analysis was carried out to improve the efficiency and stability of the hybrid generating system by optimizing the frequency load controller. Frequency instability can occur due to load fluctuations, changes in environmental conditions, or system disturbances. Therefore, the use of an effective and adaptive controller method is very important in maintaining the stability and reliability of the hybrid generator system. The analytical method used in this study involved data collection and computer modeling. The required data includes information on load variations, energy production, and environmental conditions. Furthermore, the PID, ANFIS, and Fuzzy methods are applied to the data to build a frequency load controller model. The results of the analysis show that the three controller methods have different performance in maintaining frequency stability in the hybrid generator system. The PID method provides a fast and accurate response to load fluctuations, but is less adaptive to environmental changes. While the ANFIS method is able to adapt well to changes in system conditions, it requires time for model training. Fuzzy methods can provide control that is more adaptive and tolerant to disturbances, but may require more complex tuning. However, in general, the use of intelligent controller methods such as ANFIS and Fuzzy can improve the performance of hybrid generators by producing more adaptive and stable controls. This research has important implications for the development of more efficient and reliable hybrid power systems. By choosing the right controller method, hybrid power plants can provide energy in a more stable and environmentally friendly manner, and reduce dependence on limited fossil resources. Therefore, this research can make a significant contribution to the development of renewable energy and sustainable development in the future.
Environmental Influences Cause Stress on the Use of Computer Wijaya, I Ketut
International Journal of Public Health Science (IJPHS) Vol 1, No 1: July 2012
Publisher : Intelektual Pustaka Media Utama

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (44.914 KB)

Abstract

Working with a computer over a period long enough to be done. Computer is the best medium currently in appearance and in the way of working, because the computer can assist in completing the work in a more rapid, efficient and very easy to use. With the convenience offered by the computer, almost all the work can be done with computer. Computers are a necessity in supporting work and communication tool that is quite reliable. The computer is useful in life, but can also cause problems on users, the computer can issue radiation that affects the condition of the user as well as ignorance in using computers can cause Repetitive Strain Injury (RSI). Besides, the use of computers can lead to stress as a result of incomprehension  in determining the condition of the environment on room. To be able to know the stress resulting from the use of computer, conducted research with a sample of 30 people at Udayana University Computer Science students with a design the same subject. Data analysis was performed with SPSS 13.00 and differences in the data before and after the redesigned (improvement), that do use the test independent sample t-test (t test group), at the level of significance of 5%. After a redesigned (improvement) on the environmental temperature is obtained decrease in the standard cold temperatures of Indonesia work of 28.00 C to 25.83 C, occupational stress decreased from 86% to 42%, and improve learning outcomes from 59.6% to 98.1%.. Thus It can be concluded that due to improvements made agains environmentally ergonomic standards can reduce the stress of work. Keywords: Computers; Stress.DOI: http://dx.doi.org/10.11591/ijphs.v1i1.419
Co-Authors Duman Care Khrisne Fahmi Ramadhan Febryanto Simorangkir, Walter Willy Metyu Gede Andre Agusta Putra I Kadek Oka Darma Putra I Made Mataram I Made Sutajaya I Nyoman Adi Putra I Putu Agus Semara Putra I Putu Gede Kartika I Wayan Arta Wijaya I Wayan Santyasa I Wayan Wijana Made Ngurah Satya Wibawa Putra Martogi Ivan Putra Naibaho Ni Nyoman Parwati Pasek Gede Guna Prabawa Rukmi Sari Hartati