Article Per Year (5 Year)
p-Index From 2020 - 2025
1.325
P-Index
This Author published in this journals
All Journal International Journal of Electrical and Computer Engineering Jurnal Teknoin Media Informatika Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Rotasi Jurnal Sistem Komputer TELKOMNIKA (Telecommunication Computing Electronics and Control) Bulletin of Electrical Engineering and Informatics Bulletin of Electrical Engineering and Informatics Jurnal EECCIS FLYWHEEL : Jurnal Teknik Mesin Untirta Teknika: Jurnal Sains dan Teknologi Journal Industrial Servicess Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer Jurnal Ilmiah Dinamika Rekayasa (DINAREK) Bulletin of Electrical Engineering and Informatics Proceeding of the Electrical Engineering Computer Science and Informatics VOLT : Jurnal Ilmiah Pendidikan Teknik Elektro Jurnal Ilmu Komputer dan Bisnis IJITEE (International Journal of Information Technology and Electrical Engineering) Indonesian Journal of Electrical Engineering and Computer Science INSANtek – Jurnal Inovasi dan Sains Teknik Elektro Jurnal Nasional Teknik Elektro dan Teknologi Informasi
romi wiryadinata
Universitas Sultan Ageng Tirtayasa
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

Published : 34 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 34 Documents
Search

 1   2   3   4 
Pengenalan Wajah Pada Sistem Presensi Menggunakan Metode Dynamic Times Wrapping, Principal Component Analysis dan Gabor Wavelet Wiryadinata, Romi; Sagita, Raya; Wardoyo, Siswo; Priswanto, Priswanto
Dinamika Rekayasa Vol 12, No 1 (2016): Dinamika Rekayasa Februari 2016
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2016.12.1.138

Abstract

Presensi is a logging attendance, part of activity reporting an institution, or a component institution itself which contains the presence data compiled and arranged so that it is easy to search for and used when required at any time by the parties concerned. Computer application developed in the presensi system is a computer application that can recognize a person's face using only a webcam. Face recognition in this study using a webcam to capture an image of the room at any given time who later identified the existing faces. Some of the methods used in the research here is a method of the Dynamic Times Wrapping (DTW), Principal Component Analysis (PCA) and Gabor Wavelet. This system, used in testing with normal facial image expression. The success rate of the introduction with the normal expression of face image using DTW amounting to 80%, 100% and PCA Gabor wavelet 97%
Analisa Parameter Hidrodinamika Remotely Operated Vehicle (ROV) Kelas Obervasi Satria, Dhimas; Wiryadinata, Romi; Caturwati, Ni Ketut; Haryadi, Haryadi; Rosyadi, Imron
ROTASI Vol 20, No 4 (2018): VOLUME 20, NOMOR 4, OKTOBER 2018
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (439.589 KB) | DOI: 10.14710/rotasi.20.4.221-225

Abstract

Remotely Operated Vehicle (ROV) teknologi observasi bawah laut di perairan selat Sunda yang telah dikembangkan memiliki keterbatasan dari segi manuver, yaitu hanya dapat bergerak vertical dengan kedalaman yang terbatas. Penelitian ini bertujuan untuk mendapatkan parameter hidrodinamika yang terbaik, yaitu matriks inersia, matrik coriolis, dan redaman hidrodinamika. Metode penelitian yang digunakan adalah metode fixed mesh, dimana diasumsikan fluida bergerak pada kecepatan dimana ROV bergerak dan model ROV diam (statik). Representasi gerak ROV dengan mengubah kemiringan ROV terhadap arah aliran fluida. Hasil dari penelitian adalah parameter hidrodinamika, yaitu  (matriks inersia benda tega ROV),  (Matriks koefisien untuk benda tega Coriolis),  (inersia hidrodinamika),  (matriks koefisien untuk hidrodinamika dengan Coriolis dan nilai sentripetal) memberikan koefisien inersia badan ROV kerangka rotasi terhadap titik pusat bumi. Sedangkan parameter hidrodinamika yaitu redaman hidrodiniamika menggambarkan gaya redaman hidrodinamika dan momen berkerja terhadap gerak relatif antara badan kendaraan dengan fluida
APLIKASI SENSOR LDR (LIGHT DEPENDENT RESISTANT) SEBAGAI PENDETEKSI WARNA BERBASIS MIKROKONTROLER wiryadinata, romi; Lelono, Joko
Jurnal Sistem Komputer Vol 4, No 1 (2014)
Publisher : Jurnal Sistem Komputer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jsk.v4i1.62

Abstract

Spektrum cahaya merupakan susunan cahaya berwarna yang tampak, setiap warna mempunyai panjang gelombang yang berbeda. Sensor LDR dapat mengetahui perbedan intensitas cahaya tampak berdasarkan perubahan nilai resistansinya. Dengan memenafaatkan rangkaian pembagi tegangan pada LDR dan nilai ADC pada mikrokontroler maka perbedaan warna dapat dikenali. Sensor warna yang dibuat mampu membedakan 6 jenis warna yaitu merah, hijau, biru, kuning, putih, dan hitam. Dari hasil pengujian sensor warna mampu mendeteksi warna dengan baik walaupun diberi sinar gangguan.
Implementasi Jaringan VPN Berbasis Mikrotik: Studi Kasus pada Kantor Kecamatan Walantaka Desmira, Desmira; Wiryadinata, Romi
Jurnal Ilmu Komputer dan Bisnis Vol. 11 No. 2 (2020): Vol. 11 No. 2 (2020)
Publisher : STMIK Dharmapala Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47927/jikb.v11i2.8

Abstract

Penelitian ini bertujuan untuk mengetahui rancang bangun sistem VPN Server pada Kecamatan Walantaka, salah satu instansi Pemerintah Daerah Pemprov Banten yang berada di Kota Serang untuk keamanan jaringan sehingga dapat membangun suatu komunikasi data yang aman dan cepat. Metode yang digunakan adalah enkripsi terdiri atas tiga tahapan yaitu 1) observasi dan wawancara; 2) penerapan metode dan 3) implementasi VPN. Hasil penelitian menunjukkan bahwa VPN dapat digunakan sebagai akses jaringan privat dengan menggunakan mikrotik sebagai router jaringan internet, selain itu file sharing dan remote desktop dapat dilakukan melalui VPN pada jaringan internet Kecamatan Walantaka Pemerintah Daerah Pemprov Banten..
Concurrent Quad-band Low Noise Amplifier (QB-LNA) using Multisection Impedance Transformer Teguh Firmansyah; Anggoro Suryo Pramudyo; Siswo Wardoyo; Romi Wiryadinata; Alimuddin Alimuddin
International Journal of Electrical and Computer Engineering (IJECE) Vol 7, No 4: August 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1473.192 KB) | DOI: 10.11591/ijece.v7i4.pp2061-2070

Abstract

A quad-band low noise amplifier (QB-LNA) based on multisection impedance transformer designed and evaluated in this research. As a novelty, a multisection impedance transformer was used to produce QB-LNA. A multisection impedance transformer is used as input and output impedance matching because it has higher stability, large Q factor, and low noise than lumpedcomponent.The QB-LNA was designed on FR4 microstrip substrate with er= 4.4, thickness h=0.8 mm, and tan d= 0.026. The proposed QB-LNA was designed and analyzed by Advanced Design System (ADS).The simulation has shown that QB-LNA achieves gain (S21) of 22.91 dB, 16.5 dB,  11.18 dB, and 7.25 dB at 0.92 GHz, 1.84 GHz, 2.61 GHz, and 3.54 GHz, respectively.The QB-LNA obtainreturn loss (S11) of -21.28 dB, -31.87 dB,  -28.08 dB, and -30.85 dB at 0.92 GHz, 1.84 GHz, 2.61 GHz, and 3.54 GHz, respectively. It also achieves a noise figure (nf) of 2.35 dB, 2.13 dB, 2.56 dB, and 3.55 dB at 0.92 GHz, 1.84 GHz, 2.61 GHz, and 3.54 GHz, respectively. This research also has shown that the figure of merit (FoM) of the proposed QB-LNA is higher than that of another multiband LNA.
Bandwidth and Gain Enhancement of MIMO Antenna by Using Ring and Circular Parasitic with Air-Gap Microstrip Structure Teguh Firmansyah; Herudin Herudin; Suhendar Suhendar; Romi Wiryadinata; M Iman Santoso; Yus Rama Denny; Toto Supriyanto
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 15, No 3: September 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v15i3.6377

Abstract

This research was proposed a circular patch MIMO antenna by using a ring and circular parasitic radiator structure. As a novelty, in order to enhance bandwidth and gain of circular patch MIMO antenna, a conventional circular patch MIMO antenna will be added a ring and a circular parasitic. Therefore, this research was investigated a conventional MIMO antenna (C-MA), ring parasitic MIMO antenna (RP-MA), and circular parasitic MIMO antenna (CP-MA) as Model 1, Model 2, and Model 3, respectively. This MIMO antenna was designed on FR4 microstrip substrate with r= 4.4, thickness h=1.6 mm, and tan = 0.0265. This MIMO antenna has center frequency 2.35 GHz which is a frequency band for LTE application in Indonesia. An Advance Design System (ADS) software was used to determine the antenna parameters. The MIMO antenna C-MA / RP-MA/ CP-MA achieves 2.36GHz/ 2.38GHz/ 2.38 GHz, 70 MHz/ 100 MHz/ 120 MHz, 1.625 dBi/ 4.066 dBi/ 4.117 dBi, 6.414 dBi/ 7.26 dBi/ 7.153 dBi, 33.9 %/ 47.8 %/ 49.70 %, -12.35 dB/ -22.21 dB/ -23.66 dB, and -30.924 dB/ -28.46 dB/ -27.59 dB for center frequency, bandwidth, gain, directivity, efficiency, reflection coefficient, and mutual coupling, respectively. Compared to C-MA (Model1) performances, The result showed that proposed antenna has wider-bandwidth/ higher-gain with 42.8%/ 150.2 %, and 71.4%/ 163.3% for RP-MA (Model 2) and CP-MA (Model 3), respectively. The proposed antenna has size of 50 mm x 130 mm x 23.2 mm. Measured results are in a good agreement with the simulated results.
Design of a Low Cost Remotly Operated Vehicle with 3 Dof Navigation Romi Wiryadinata; Annisa Sucianti Nurliany; Imamul Muttakin; Teguh Firmansyah
Bulletin of Electrical Engineering and Informatics Vol 6, No 1: March 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v6i1.596

Abstract

One type of underwater robot is the ROV (Remotely Operated Vehicle) whose movements are controlled directly by humans from the water surface. In this paper, ROV prototype has been designed and tested with three DoF (Degrees of Freedom) and controlled by a joystick which is connected with UTP (Unshielded Twisted Pair) cables as data transmission between joystick with a microcontroller embedded in the robot. This prototype has 3 thrusters with 3 degrees of freedom, 1 rotational motion (heave) and 2 translational motion (yaw and surge), with direction of movement up, down, forward, backward, turn right, and turn left. Speed mode setting when forward movement on PWM (Pulse Width Modulation) 75% = 0,037 m/s, 90% = 0.053 m/s and 100% = 0,071 m/s, while the reverse speed by 75% = 0,034 m/s, 90% = 0.045 m/s and 100% = 0.059 m/s, when the ROV moves up is 0,042 m/s, down 0.032 m/s, turn right 9 o/s and turn left 15 o/s set with fixed PWM value, is 100%.
KALMAN FILTER SEBAGAI METODE ESTIMASI UNTUK MENGUKUR KECEPATAN KENDARAAN Romi Wiryadinata
Teknoin Vol. 20 No. 4 (2014)
Publisher : Faculty of Industrial Technology Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/.v20i4.7452

Abstract

Methods for estimating speed be categorized into two classes, namely active method and passive methods. One method that can be used in speed estimation using a passive method is the Kalman filter. Kalman filter is an very effective estimator that is in estimating state dynamics system involving white noise. In this study, the Kalman filter will be used to estimate the variation of vehicle speed from a speed of 5 km/hour to 60 km/hour. Kalman filter is designed to get input in the form of cascading imagery of the vehicle video recordings. Results of the testing showed that speed can be minimum estimated is 20 km hour with an error of 4.25%. While the maximum estimated speed is 60 km/hour with an error of 0.22%.
Ekstraksi Ciri pada Isyarat Suara Jantung Menggunakan Power Spectral Density Berbasis Metode Welch Yul Antonisfia; Romi Wiryadinata
Media Informatika Vol. 6 No. 1 (2008)
Publisher : Department of Informatics,Faculty of Industrial Technology,Islamic University of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Telah dilakukan ekstraksi ciri data EKG untuk jantung murmur dan normal dengan mengklasifikasikan 24 isyarat murmur dan beberapa jantung normal. Perekaman menggunakan stetoskop dengan penguat berlebar bidang 1 kHz direkam suara jantung normal dari beberapa orang sampel dan untuk melengkapi data murmur patalogis maka di-download suara murmur jantung dari situs internet. Isyarat suara jantung kemudian dianalisis spektral dayanya untuk diekstraksi ciri dan dicari beberapa resolusi spectral-nya. Hasil yang diperoleh menunjukan bahwa dengan ekstraksi ciri menggunakan metode spektral dapat membedakan suara jantung normal dan murmur. Keberhasilan isyarat yang bercampur derau dengan SNR 10 dB dapat mencapai 90% dengan resolusi 125 cacah cuplikan frekuensi. Makin besar derau yang mempengaruhi isyarat suara jantung (SNR makin kecil) maka keberhasilan pengujian semakin mengecil.
Data Compression Coding Using Static and Dynamic Method of Shannon-fano Algorithm Romi Wiryadinata
Media Informatika Vol. 5 No. 2 (2007)
Publisher : Department of Informatics,Faculty of Industrial Technology,Islamic University of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Tulisan ini membahas tentang teknik kompresi data dengan menggunakan metode shannon-fano dengan membandingkan antara teknik statik dan teknik dinamik dengan menggunakan data yang sama. Data yang dibandingkan adalah berupa data pesan dalam bentuk teks ’gadjahmada’ yang diolah sedemikian rupa menjadi kode ASCII dan runtun biner. Untuk pesan teks yang pendek metode statik lebih cocok digunakan agar menghasilkan kode dan runtun data yang lebih sedikit tetapi membutuhkan waktu yang cukup lama untuk scanning huruf, sedangkan untuk pesan teks yang panjang metode dinamik lebih cocok digunakan untuk mempersingkat waktu komputasi tetapi dengan hasil runtun data keluaran yang sedikit lebih besar dari metode statik. Secara keseluruahan algoritma Shannon-Fano menghasilkan runtun data yang lebih sedikit dari total runtun data yang masuk (dengan asumsi satu data/huruf membutuhkan alokasi 8 bit). Total bit keluaran dengan metode statik dapat mencapai 24 bit dengan rasio kompresi 0.3 dan dengan menggunakan metode dinamik dapat menghasilkan 34 bit runtun data output dengan rasio kompresi 0.425.
Co-Authors Alfanz, Rocky Alfanz, Rocky Alia Shaliha Amany Alief Maulana Alimuddin Alimuddin Amany, Alia Shaliha Anggoro S Pramudyo Anggoro Suryo Pramudyo Annisa Sucianti Nurliany Aribowo, Didik Arya Prasetyo Habibie Boby Fisher Butar-butar Butar-butar, Boby Fisher Denny Hardiyanto Desmira Desmira Desmira Desmira Desmira Desmira, Desmira Dhimas Satria Didin Yogiyansyah Dwi Ana Ratnawati Fahrizal, Rian Fajar Saptono Firda Andini Galang Wicaksono Habibie, Arya Prasetyo Haryadi - Heri Kusharyanto Herudin Herudin Iing Mutakhiroh Imamul Muttakin Imron Rosyadi Istiyah, Umi Iwan Tirta Joko Lelono Kliwati, Sri M Iman Santoso Maulana, Alief Mohd Ruzaini Hashim Muhammad Afif Muhammad Nurtanto Muhammad Rofiki Adli Mustofa Abi Hamid Ni Ketut Caturwati, Ni Ketut Norazhar Abu Bakar Norazhar Abu Bakar NUR HASANAH Nur Kholifah Priswanto Priswanto, Priswanto Priswanto, Priswanto Raya Sagita Raya Sagita, Raya Ri Munarto Rian Fahrizal Roman Lesmana Rustamaji, Rustamaji Setiawan, Ipick Setyawan, Haris Siswo Wardoyo Siswo Wardoyo Sobar, Fragrans Anjasmara Suhendar Suhendar Teguh Firmansyah Teguh Firmansyah Teguh Firmansyah Toto Supriyanto Umi Istiyah Wahyu Widada Wahyuni Martiningsih Widada, Wahyu Yul Antonisfia Yus Rama Denny