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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) International Journal of Applied Power Engineering (IJAPE) Inersia : Jurnal Teknik Sipil dan Arsitektur Transmisi: Jurnal Ilmiah Teknik Elektro KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Ganendra: Majalah IPTEK Nuklir TELKOMNIKA (Telecommunication Computing Electronics and Control) Bulletin of Electrical Engineering and Informatics Kepelatihan Olahraga Jurnal Mahasiswa TEUB Jurnal Teknologi Rekayasa Mesin Jurnal EECCIS REKAYASA e-Jurnal Arus Elektro Indonesia Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control Jurnal Kelautan Nasional JISIP: Jurnal Ilmu Sosial dan Pendidikan Jurnal Intake : Jurnal Penelitian Ilmu Teknik dan Terapan Jurnal Ekonomi Manajemen Sistem Informasi JIIP (Jurnal Ilmiah Ilmu Pendidikan) Frontier Energy System and Power Engineering JURNAL HOSPITALITI DAN PARIWISATA SPRINTER: Jurnal Ilmu Olahraga PROFICIO: Jurnal Pengabdian Masyarakat juremi: jurnal riset ekonomi Jurnal Bina Pengabdian Kepada Masyarakat Jurnal Nasional Teknik Elektro dan Teknologi Informasi SinarFe7 Jurnal INFOTEL Journal of Built Environment Studies El-Mal: Jurnal Kajian Ekonomi & Bisnis Islam Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Prosiding Seminar Nasional Ilmu Manajemen Kewirausahaan dan Bisnis INTERNATIONAL JOURNAL OF SOCIETY REVIEWS (INJOSER)
Wijono
Teknik Elektro Universitas Brawijaya Malang
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Unjuk Kerja Performa Turbin Arus Laut Sumbu Vertikal Pada Berbagai Bentuk Sudu Unik Rizki Mendung Ariefianto; Rini Nur Hasanah; Wijono Wijono
Rekayasa Vol 15, No 1: April 2022
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v15i1.13572

Abstract

Efficiency and self-starting capability performances are the main problems in vertical axis turbines. By purposing improves its performance, vertical axis turbines have been developed with various models. One of the developments of this model is to design the turbine blades into unique shapes. This research aims to determine the performance of some unique blade vertical axis turbines conditioned on the same parameters, especially if applied in a marine environment. Turbines with helical blade (HB), eggbeater-shaped blade (ESB), diamond-shaped blade (DSB), Y-shaped blade (YSB), and arrow-shaped blade (ASB) were investigated based on efficiency and self-starting capability using QBlade software. Good performance symmetrical foils such as NACA 634021 are also applied to each turbine. The simulation results show that from the aspect of efficiency performance, turbine ASB more than HB more than ESB more than DSB more than YSB. Meanwhile, in the aspect of self-starting capability performance, the sequence is similar to efficiency performance, based on the two approaches applied. The highest efficiency achieved by the ASB turbine is 0.391 at the lowest tip speed ratio of λ = 4. The ASB turbine also achieves the best self-starting performance, which has a minimum static torque coefficient of 0.00155 and can produce the required power at the lowest marine current speed of 0.806 m/s. This performance brings the ASB turbine to produce a rated power of 52.52 kW, or more than twice the power production of the lowest efficiency turbine and has an average power gain of 3.75 kW per 0.2 m/s.
Pengelompokan Artikel Berbahasa Indonesia Berdasarkan Struktur Laten Menggunakan Pendekatan Self Organizing Map Akhmad Zaini; M. Aziz Muslim; Wijono
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 6 No 3: Agustus 2017
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1288.582 KB)

Abstract

Document grouping is a necessity among a large number of articles published on internet. Several attempts have been done to improve this grouping process, while majority of the efforts are based on word appearance. In order to improve its quality, the grouping of documents need to be based on topic similarity between documents, instead of the frequency of word appearance. The topic similarity could be known from its latency, since the similarity of the word interpretation are often used in the same context. In the unsupervised learning process, SOM is often used, in which this approach simplifies the mapping of multi-dimension data. This research result shows that implementation of the latent structure decreases characteristic dimension by 32% of the word appearance, hence makes this approach more time efficient than others. The latent structure, however, when implemented on SOM Algorithm, is capable to obtain good quality result compared to word appearance frequency approach. It is then proven by 5% precision improvement, recall improvement of 3%, and another 4% from F-measure. While the achievement is not quite significant, the quality improvement is able to put the dominance of grouping process, compared to the original classification defined by the content provider.
Metode Flyback pada Pembangkitan Tegangan Tinggi untuk Aplikasi Plasma Electrolytic Oxidation Kumala Mahda Habsari; Wijono; D.J. Djoko H.S.
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 6 No 3: Agustus 2017
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1123.759 KB)

Abstract

Flyback is one of high voltage generation methods using a low voltage source. This method has a simple circuit, which consists of two main components for generating the high voltage. In this study, flyback method is used to generate high voltage on plasma electrolytic oxidation (PEO) application. PEO is a process that combine electrochemical oxidation process and high voltage spark. This application needs high voltage to produce plasma. The plasma is used to form a new surface coating on metal. Flyback circuit is succesfully simulated on LTSpice IV. Voltage value and waveform on simulation has been observed and compared with the real one. The measured and observed part is IGB gate, output voltage of transformer before diode, and load voltage after diode. Flyback effect and waveform on simulation has the similiar result with the real one. A 10 volt input voltage can produce output voltage on the average of 1 kilovolt. Therefore, flyback simulation is able to represent flyback ability on real circuit for generating high voltage which can be used on high voltage generation for PEO application.
Pengaruh Phrase Detection dengan POS-Tagger terhadap Akurasi Klasifikasi Sentimen menggunakan SVM Hermawan Arief Putranto; Onny Setyawati; Wijono
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 5 No 4: November 2016
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (961.687 KB)

Abstract

Sentiment analysis or opinion mining, which is one of the application of Natural Language Processing (NLP), aims to find a method to facilitate human in communicating with a computer using their common language. To simplify the process of understanding human language, there are three important stages that must be carried out by a computer, which are tokenizing, stemming and filtering. The tokenizing that breaks down the sentence into a single word will make the computer assume all words (token) are the same. If there is a phrase formed from one of unimportant words, which is happened to be in the stoplist, the phrase will be deleted. Solution for the aforementioned problem is tokenizing based on phrase detection using Hidden Markov Model (HMM) POS-Tagger to improve classification performance using Support Vector Machine (SVM).With this approach, computer will be able to distinguish a phrase from others, then store the phrase into a single entity. There is an increase in accuracy by approximately 6% on Dataset I and 3% on Dataset II in the classification process using phrase detection, due to reduction of missing features that usually occurs in the filtering process. In addition, the detection of the phrase-based approach also produces the most optimal classification model, as seen from the ROC value that reaches 0.897.
Perbaikan Missing value Menggunakan Pendekatan Korelasi Pada Metode K-Nearest Neighbor Novta Dany'el Irawan; Wijono Wijono; Onny Setyawati
JURNAL INFOTEL Vol 9 No 3 (2017): August 2017
Publisher : LPPM INSTITUT TEKNOLOGI TELKOM PURWOKERTO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20895/infotel.v9i3.286

Abstract

Missing value sering terjadi dalam metode klasifikasi dikarenakan informasi tentang obyek tidak diberikan, sulit dicari atau memang informasi tersebut tidak ada. Hal ini menyebabkan menurunnya keakuratan dan kualitas data pada saat data diolah. Pendekatan korelasi dilakukan karena peneliti harus mengetahui tentang ada tidaknya dan kuat lemahnya hubungan variable yang terkait dalam suatu objek atau subjek yang diteliti. Metode klasifikasi yang digunakan yaitu metode K-NN, karena metode ini termasuk metode klasifikasi yang memiliki konsistensi yang kuat. Metode ini mencari kasus dengan menghitung kedekatan antara kasus baru dengan kasus lama berdasarkan nilai K atau tertangga terdekat. Pendekatan korelasi dapat dilakukan untuk mengatasi missing value, terbukti dengan meningkatnya hasil klasifikasi dan hilangnya data yang belum terklasifikasi. Kuisioner berfungsi sebagai alat ukur, kuisioner berisi beberapa pertanyaan yang diberikan kepada responden, dari hasil kuisioner dilakukan analisa data untuk mengetahui tingkat korelasi data cadangan. Setelah mendapatkan tingkat korelasi data cadangan, maka data cadangan tersebut digunakan sebagai pengganti data yang terdapat missing value. Sebelum dilakukan penggantian data yang terdapat missing value, hasil klasifikasi dari 500 data adalah jurusan IPA sejumlah 88 siswa, jurusan IPS 126 siswa, jurusan bahasa 271 siswa, dan belum terklasifikasi/false 15 siswa. Setelah dilakukan penggantian data yang terdapat missing value, hasil klasifikasi dari 500 data adalah jurusan IPA berjumlah 102 siswa, jurusan IPS berjumlah 316 siswa, bahasa berjumlah 82 siswa, dan tidak ada data yang belum terklasifikasi. Berdasarkan hasil percobaan yang dilakukan nilai k = 3, 5, 7, 9, dan 11. Dapat diketahui nilai k = 5 memiliki tingkat akurasi yang tinggi dibandingkan dengan nilai k yang lain yaitu 97%, jadi dalam penelitian ini nilai k yang dipakai pada metode K-NN adalah 5
Physical Characteristics of Entrance Areas of Coss Passage alongside Jl. Agro, Yogyakarta Yurista Hardika Dinata; Djoko Wijono
Built Environment Studies Vol 1 No 1 (2020)
Publisher : Department of Architecture and Planning, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/best.v1i1.366

Abstract

This study aimed to determine the physical characteristics of the entrance areas of cross passage alongside Jl. Agro, Yogyakarta. This study was a descriptive qualitative research, where the observational cases were determined based on the purposive sampling technique. The research results showed that commercial buildings with a short seatback constructed the wall space around the entrance areas of cross passage. The scale of the road space was formed by a combination of balanced and narrow space affected by the height of the building. Street floor space, signage, and vegetation showed different patterns at each entrance areas of cross passage. As part of street furniture, gate and sculpture turned into a strong identity in the cross-passage area. There were nine entrance areas of cross passage as a case of observation. The nine cases' physical appearance showed the distinctive form of the archipelago and local identity as three different elements bound them: urban village area as a local identity, Mataram ditch as a heritage of the agricultural system, and universities as a generator of activity.
Urban Architecture in Malabero Village, The Old City of Bengkulu Dwi Rina Utami; Djoko Wijono
Built Environment Studies Vol 1 No 1 (2020)
Publisher : Department of Architecture and Planning, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/best.v1i1.498

Abstract

Urban architecture in Malabero village is an interesting part to be researched. This is demonstrated by several elements of urban architecture that illustrate specific characteristics such as the Thomas Parr Monument, the Old Post Office, Merdeka Square, Kampung Cina, Bengkulu Malay settlement, a settlement built on the coastline and various building build on the sea embankment. This research was conducted to determine the configuration of contemporary architecture in Malabero and how it happen using qualitative and explorative methods. The research results that architecture configuration of the street in Malabero village consists of spread and linear organic patterns. Architecture configuration of building and space on the settlement scale based on ethnicity with diverse characteristics and tend to follow the street with linear patterns, meanwhile on the urban scale tend to the octopus shape cities. The configuration of infrastructure and vegetation in Kampung Cina and Merdeka Square is complete and well designed. Furthermore, the configuration of signages tend to be found at the cross street. This research also revealed that the architecture configuration was formed due to several factors such as historical, geographical, policy, and control of the government, economic, socio-cultural, important event, and lifestyle.
PELETAKAN DAN ANALISIS KEANDALAN KABEL BAWAH LAUT BANGKA-LEPAR Agung Fitrahadi; Wijono Wijono; Harry Soekotjo
Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Vol 6 No 2 (2019): Jurnal Ecotipe, Oktober 2019
Publisher : Jurusan Teknik Elektro, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/ecotipe.v6i2.1071

Abstract

Penelitian ini mengevaluasi keandalan submarine power cable 20 kV Bangka-Lepar. Submarine power cable ini juga menggambarkan jaringan distribusi tegangan menengah di Bangka-Lepar dan menentukan korelasi berbagai parameter yang mempengaruhi operasi jaringan kemudian memberikan informasi tentang prosedur peletakan kabel. Selanjutnya penelitian dilakukan dengan analisis reliabilitas berdasarkan model statistik. Model ini digunakan untuk mengevaluasi karakteristik operasional kabel seperti tingkat kegagalan dari penyebab alami atau manusia serta juga digunakan untuk memilih antara dua rute kabel dan menentukan satu keandalan maksimum.
Implementasi DVR pada Saluran Penyulang Pujon dengan Kompensasi Tegangan Dip Arief Trisno Eko Suryo; Wijono Wijono; Bambang Siswojo
Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Vol 7 No 2 (2020): Jurnal Ecotipe, Oktober 2020
Publisher : Jurusan Teknik Elektro, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jurnalecotipe.v7i2.1821

Abstract

This paper discusses the DVR of on Pujon line with voltage Sag/Dip compensation. The voltage Dip is often the result of Single line-to-ground fault. The voltage Dip makes tripping and damage the load equipment a problem that must be addressed. DVR implementation is used to complement the voltage Dip. The ANN control method was proposed to regulate DVR performance in compensating the voltage Dip. Simulated results demonstrated with the implementation of a DVR in the Pujon replay line capable of compensating the voltage of the Single line-to-ground fault from a voltage drop that was originally 0536 PU and can be repaired by 0968 PU.
Desain Penyeimbangan Sel Baterai Lithium-Ion dengan Teknik Cell-to-Cell Charging Mode pada Battery Management System (BMS) Khaeruddin Khaeruddin; Wijono Wijono; Rini Nur Hasanah
Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Vol 8 No 1 (2021): Jurnal Ecotipe, April 2021
Publisher : Jurusan Teknik Elektro, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jurnalecotipe.v8i1.2137

Abstract

Makalah ini membahas tentang penyeimbangan arus charging baterai lithium-ion pada BMS (Battery Management System) mobil listrik. Kondisi tidak seimbang pada saat proses pengisian baterai disebabkan karena salah satu baterai yang sudah terisi penuh sedangkan sebagiannya masih separuh atau bahkan hanya seperampat saja yang terisi. Kondisi ini dapat menyebabkan baterai cepat panas, serta melewati kondisi SOA (Safety of Area) sehingga menyebabkan kebakaran pada baterai. Pada penelitian ini, teknik cell-to-cell diusulkan untuk menyeimbangkan arus pengisian ke masing-masing sel baterai agar mendekati kondisi sama rata. Hasil simulasi menunjukan bahwa penggunaan teknik balancing cell-to-cell dapat menyeimbangkan sel baterai selama masa pengisian. Kata kunci: Penyeimbangan, Sel, Baterai, Lithium-ion, Cell-to-cell, BMS.
Co-Authors Abd. Rasyid Syamsuri Abraham Latumahina Achmad Rizanul Wahyudi Adabiah, Suhadah Rabi'atul Adi Mulyadi Adjie, Andreas Bimo Putro Agung Fitrahadi Ahmad Fahrudi Setiawan Ahmad Yusuf Rizki Akhmad Zaini Akhmad Zaini, Akhmad Aldi Lutfil Hikam Aldian Ferdiansyah Mahendra Aldias Rizaldi Alsabah, Mus Ali Amaral, Hanifiyah Darna Fidya Andang Widiharto Andri Suyoko Andrie Batista Azizul Hakim Angga Dwi Saputra Anggraeni, Karina Anik Tri Wahyuningtyas Annisa Rifqiana Annisa Rifqiana Annisa Rifqiana Anshori, Mochammad Isa Ansyaruddin Rahmatdiansyah Ardhito Primatama Ardiansyah, Rendy Ari Permana L. Ariefianto, Rizki Mendung Arnold J. Kastanja Arthanto, Dwi Handoko Asri Ady Bakri Bakti Setiawan Bambang Siswojo Bambang Siswoyo Basuki Winarno Basuki Winarno, Basuki Bernadus Blasio Arsoni Bob Alvin Sidabutar Bob Alvin Sidabutar Corina Martineac D Purnomo D. J. Djoko H. S. D.J. Djoko H.S. D.J. Djoko H.S., D.J. Djoko Darsono Darsono Dary Rafi Brafianto Dary Rafi Brafianto David Suban Koten Denny Widhiyanuriyawan Destha T Raharjana Dheo Kristianto Dhofir, Mochammad Dicki Bagus Chandra Dio Alif Airlangga Daulay Donny Ardi Kusuma Dony Darmawan Putra Dony Darmawan Putra Duta Narendratama Dwi Rina Utami Dwiatmaja, Agus Effendi Dodi Arisandi Eka Citra Agustini Eka Maulana Eka Maulana Eko S, Arief Trisno Elin Nuraini Erni Yudaningtiyas Farizha Irmawati, Farizha Fitri Novilia Frengki Eka Putra Surusa Galih Setiaji Hadi Suyono Hadi Suyono Hakim, Yusril Amir Abdullah Halomoan Marthin Muskita Harry Soekotjo HARRY SOEKOTJO DACHLAN Harry Soekotjo Dachlan Harry Soekotjo Dachlan Harry Soekotjo Dachlan Hary Septianwari Hasan Hasan Heddy S Ahimsa-Putra Hemi Septiady Hendrie A Kusworo Hendrik Kenedy Tupan Hermawan Arief Putranto Hery Purnomo Hikam, Aldi Lutfil Ibnu Kurnia Cahya Ihsan Ahmad Badrianto Irawan, Novta Danyel Irmantara Subagio Jemadi Jemadi Jemadi Junaidi Noh Khaeruddin Khaeruddin Khairil Anwar Kumala Mahda Habsari Kunjung Ashadi Kusuma, Dony Ardy Lily M. Sikome Lunde Ardhenta Lutfir Rahman Aliffianto M. Aziz Muslim M. Aziz Muslim M. Julius M. Julius St Mardotillah, Nanda Azizah Maulani Candra MG Adiyanti Moch. Dofir Mochamad Purnomo Mochammad Rusli Mohammad Taufan Asri Zaen Muchammad Andaru Ardana Muh. Ardiansyah A. P. Muhamad Luthfi Muhammad Aziz Muslim Muhammad Aziz Muslim Muhammad Daffa Hibatullah Muhammad Fauzan Muhammad iqbal Muhammad Kharis Fajar n/a Soeprapto Nola Ribath Nola Ribath Nugraha, Anggara Cahya Nur Faliza Nurkholis Hamidi Nurkholis Nurkholis Nurwati, Tri Onny Setyawati Pieter S. Tatipikalawan Pikaloka, Teguh Vio Ponco Siwindarto Pramudita Pamungkas Purwanto, Agus Tri Putra, Hari Widagdo Putra, Reza Hadi Editya Putranto, Hermawan Arief Rachmawati, Isti Dian Rakha Ghilman Fakhruddin Yusuf Ramadhani Kurniawan Subroto Ranap Sitorus Rendy Ardiansyah Ridlwan, Asfarur Rieneke Ryke Kalalo Rif'an, Mochammad Rina Tri Turani Saptawati Rini Nur Hasanah Rini Nur Hasanah Rizki Mendung Ariefianto Rizki Mendung Ariefianto Rizky Muhammad Sidik Rusdiawan, Afif Rusli, Mochammad Saefurrochman Saefurrochman Saipul, Saipul Sartika Wiguna, Anggri Sativa Sativa Sidiq, Rizky Muhammad Siregar, Dody Yunus Putra Siswojo, Bambang Sri Ekanti Sabardini Sukaryono Sukaryono Sunaryo Sunaryo Suryo Adi Wibowo Suryo, Arief Trisno Eko Suyono, Hadi Syaiful Rachman Syamsu Dhuha Taufik Teguh Lesmana Tri Nurwati Tri Nurwati Tri Setyo Utami Tria Lady Sijabat Tutur Jatmiko Unggul Wibawa Vinsensius Anggara Paramayuda Walenta, Abdi Sakti Waristra Tyo Nirwansyah Waru Djuriatno Waru Djuriatno Waru Djuriatno Waru Djuriatno Waru Djuriatno Waru Djuriatno. Widhohardhono, Rachman WIWIEN ANDRIYANTI Yogiswara Yogiswara Yukovany Zhulkarnaen Yurista Hardika Dinata Yusril Amir Abdullah Hakim Yusril Amir Abdullah Hakim, Yusuf Maulana Ramadhan Zainul Abidin Zainul Abidin Zuhal Azmiy Dwi Rachman