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All Journal Seminar Nasional Aplikasi Teknologi Informasi (SNATI) TEKNIK Transmisi: Jurnal Ilmiah Teknik Elektro JURNAL SISTEM KOMPUTER JURNAL SISTEM INFORMASI BISNIS TRANSIENT: Jurnal Ilmiah Teknik Elektro Jurnal Sistem Komputer TELKA - Telekomunikasi, Elektronika, Komputasi dan Kontrol Neo Teknika: Jurnal Ilmiah Teknologi
Yuli Christyono
Departemen Teknik Elektro, Universitas Diponegoro Semarang Jl. Prof. Sudharto, SH, Kampus UNDIP Tembalang, Semarang 50275, Indonesia
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering

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Perancangan dan Analisis Antena Mikrostrip dengan Frekuensi 850 MHz untuk Aplikasi Praktikum Antena Nugraha, Adhe Setya; Christyono, Yuli; Sukiswo, Sukiswo
Transmisi Vol 13, No 1 (2011): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (487.192 KB) | DOI: 10.12777/transmisi.13.1.39-45

Abstract

Problems antenna of conductor materials is rather complicated construction and size are usually quite large, so for purposes such as a cellular system is considered less efficient. For this purpose requires a simple antenna, a thin, easy to manufacture, and can be connected with other circuits. Then came the idea to design a microstrip antenna that antenna. How to make a microstrip antenna is printed on the plate by the PCB (Printed Circuit Board), then peradiasinya coated with a solution of silver or other conductor material. Who's lining material that many in the market is epoxy glass fiber (e r = 4.7) with 1.5 mm layer thickness. The purpose of this thesis is to create some models of microstrip antenna that can later be used in practical antenna. The antenna was designed at a frequency of 850MHz with a square, equilateral triangle, and circle. Then the three forms of microstrip antenna design results will be analyzed using software IE3D V12 to obtain the design parameters of antenna and frequency of these antennas. The third form of radiation pattern of microstrip antenna is directional (directional). Results of simulation of microstrip circular antennas : resonant frequency = 0.8535 GHz, VSWR = 1.046, retrun loss = - 32.89 dB, bandwidth = 1.4167%, the total gain = - 0.673953 dB, HPBW = 170,5110, rectangular microstrip antenna : resonance frequency = 0.849503 GHz, VSWR = 1109, return loss = - 25.7143 dB, bandwidth = 1.4547%, the total gain = - 0.205832 dB, HPBW = 170,6550 and for equilateral triangular microstrip antennas : resonant frequency = 0, 8515 GHz, VSWR = 1115, return loss = -25.28 dB, bandwidth = 1.3055%, the total gain = - 2.32265 dB, HPBW = 170,5710. And on the test results obtained for circular microstrip antennas : resonant frequency = 900MHz, VSWR = 1.03, power received = 0.067 mW, HPBW = 620, rectangular microstrip antennas : resonant frequency = 895MHz, VSWR = 1.04, power received = 0.039 mW, HPBW = 880 and antenna for microstrip equilateral triangle : resonance frequency = 895MHz, VSWR = 1.05, power received = 0.033 mW, HPBW = 690. Keywords: microstrip antenna, substrat materials, antenna parameters, the working frequency antenna
PENGEMBANGAN PERANGKAT KERAS SISTEM MODULASI DIGITAL 8-QAM MENGGUNAKAN MODULASI FM Christyono, Yuli; Nugroho, Yunianto Panji
Transmisi Vol 17, No 4 Oktober (2015): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (472.95 KB) | DOI: 10.12777/transmisi.17.4.177-185

Abstract

Quadrature Amplitude Modulation merupakan salah satu modulasi digital yang menumpangkan sinyal informasi berupa data biner ke sinyal pembawa berupa sinyal sinusoidal. Teknik modulasi ini memanfaatkan perubahan fase dan amplitudo sinyal pembawa dengan frekuensi tetap. Modulasi QAM terbagi lagi menjadi beberapa jenis antara lain 8-QAM, 16-QAM, 64-QAM dan seterusnya.Pengelompokan ini didasarkan atas banyaknya bit dalam satu symbol. Pada sistem modulasi 8-QAM satu simbol merepresentasikan data sebanyak tiga bit. Penelitian ini mengembangkan penelitian yang terdahulu sehingga pengiriman sinyal 8-QAM antara modulator dan demodulator dibuat menjadi sistem nirkabel. Pengiriman sinyal 8-QAM ini menggunakan modulasi frekuensi. Modulator FM diatur bekerja pada frekuensi 87 MHz sehingga tidak mengganggu siaran radio dari pemancar-pemancar radio FM komersial. Modulasi frekuensi dipilih karena kelebihannya dibandingkan dengan modulasi amplitudo dalam hal ketahanannya terhadap interferensi. Osilator pada bagian modulator juga dikembangkan mengguanakan osilator kristal agar dapat menghasilkan sinyal dengan frekuensi yang stabil. Pada hasil pengujian, osilator kristal dapat menghasilkan sinyal dengan frekuensi 38 KHz dengan pergeseran frekuensi dibawah 1%. Pemancar FM bekerja stabil dengan frekuensi 87 MHz dan lebar pita sebesar 300 KHz. Penerima FM dapat menerima sinyal gabungan yang terdiri dari sinyal 8-QAM dan sinyal pembawa 19 KHz sesuai dengan yang dikirimkan pada bagian modulator. Kata Kunci : Modulasi, 8-QAM, Transmisi FM
PERANCANGAN PERANGKAT TRANFER DATA FILE KOMPUTER TERENKRIPSI SECARA HARDWARE MENGGUNAKAN MEDIA WRELESS DAN MIKROKONTROLER AVR ATMEGA162 Ardyanto, Denny; Christyono, Yuli; Zahra, Ajub Ajulian
Transmisi Vol 15, No 4 (2013): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1131.266 KB) | DOI: 10.12777/transmisi.15.4.178-185

Abstract

Abstrak Sistem informasi jaman sekarang terdapat banyak tantangan - tantangan baru di dalam keamanan informasinya. Baik di suatu negara, perusahaan atau sebuah organisasi, keamanan data adalah salah satu hal yang penting dalam komunikasi data antar computer melalui jaringan. Banyak orang menyiasati bagaimana cara mengamankan data yang akan dikirim dan diterimanya. Keamanan data bisa dijaga dengan berbagai cara, salah satunya adalah dengan cara melakukan enkripsi terhadap data yang dikirimkan. Dalam penelitian ini, dibuat suatu alat untuk mengamankan data yang akan dikirim dan yang akan diterima dengan menggunakan enkripsi TEA. Sehingga apabila terjadi penyadapan data pada saat pengiriman ataupun penerimaan, data tersebut tidak dapat dibaca oleh penyadap tersebut karena sudah dalam bentuk enkripsi. kata kunci: keamanan data, pengiriman data, enkripsi, TEA     Abstrak In era information systems, there are many new challenges in the information security. Wherever in a country, company or an organization, security of data is one of the important things in the communicaton of data between one computer and the other through a network. Many people think about how to secure datawhich to be sent and to be received. Security of data can be maintained in various option, one of which is to encrypt the data transmitted. In this research, created a tool to secure data which to be sent and to be received by TEA encryption. So in case of interception of data during transmission or reception, the data can’t be read by eavesdroppers because it is still in encrypted form. Key : security data, transfer data, encripsi, TEA
Penyembunyian Data Rahasia pada Citra Digital Berbasis Chaos dan Discrete Cosine Transform Prabowo, Anton; Hidayatno, Achmad; Christyono, Yuli
Transmisi Vol 13, No 2 (2011): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (537.527 KB) | DOI: 10.12777/transmisi.13.2.46-52

Abstract

Steganography is one of technique that developed to keep the security of data by hidding or embedding it in other data media so that it’s content or even it’s existence is not notice. Many steganography methode have been developed in the last few years, but it still needed a steganography system with highest capacity and robustness. By combining and modifying few technic, in this Final Project has made a steganography system that used to embedding and extracting secret data in image data form (BMP 8 bit grayscale and 24 bit color), voice data form (WAV PCM 11.025 KHz 8 bit mono), and text data form (TXT) into cover data in image data form (BMP 8 bit grayscale). Data hidding was done at frequency domain by applying DCT (Discrete Cosine Transform) and chaos theory was applied using logistic map equation. Program was made using Borland Delphi 7 programming language. By using subjectif quality, RMS (Root Mean Square) metrics, and similarity ratio measurement parameter, program performance was observed by doing research consist of: research of initialitation parameter change influences; research of embedding and extracting secret digital data in image, voice, and text form into cover digital data in image form; research of program realibility from data manipulation operation including brigthness modification, contrast modification, resizing, cropping, and JPEG compression. Keyword : steganography, discrete cosine transform, chaos theory, logistic map, root mean square.
Simulasi Sistem Informasi Geografis (SIG) Pemantauan Posisi Kendaraan Via SMS Gateway Hanifah, Raidah; Isnanto, R. Rizal; Christyono, Yuli
Transmisi Vol 12, No 2 (2010): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (328.069 KB) | DOI: 10.12777/transmisi.12.2.45-49

Abstract

Nowadays a vehicle position monitoring system has started to be built  as its rising demand. A system with capability to trace the position of a vehicle by its owner or third party is well known as vehicle tracking system. This system provide many advantages, therefore in this Final Project a simulation of Geographic Information System (GIS) for Vehicle Position Tracking via SMS Gateway System is made. This system contains two main parts, those are device part and application part. Device part is simulated with a device simulation program. On the other side, application part will show the position information which sent by device par. The information is shown as a graphic with a map as the background. These two parts are developed by Delphi 7.0 programming language and MySQL 5.0 as a database storage. To show the map and mapping functions in this application, an additional program MapObject 2.0 is used. The function of SMS Gateway is connects the device part and application part, and software for this function is Gammu 1.25. This research results a simulation to monitor vehicle position system. The testing results show that this system works properly, and all functions work well as it purposes. The application part shows the position data from device part as pointed tracks in a map. Communication between GIS application part and  device part via Gammu also works properly, with average interval of SMS sending time and receiving time is 17,8 seconds. Keyword :   Geographic Information System (GIS), Position monitoring, SMS Gateway, Gammu.
PERANCANGAN DAN ANALISIS ANTENA J-POLE DUALBAND DENGAN VARIASI BENTUK “T” UNTUK KOMUNIKASI RADIO TRANSCEIVER PADA PITA VHF DAN UHF Krismawardana, Yoga; Christyono, Yuli; Riyadi, Munawar Agus
Transmisi Vol 17, No 1 Januari (2015): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (950.572 KB) | DOI: 10.12777/transmisi.17.1.20-29

Abstract

Abstrak   Radio transceiver merupakan salah satu aplikasi dari sistem telekomunikasi nirkabel yang masih banyak digunakan sampai saat ini. Istilah transceiver digunakan karena radio tersebut dapat berfungsi sebagai transmitter dan receiver. Pada penelitian ini disimulasikan dan diimplementasikan sebuah antena J-Pole dualband untuk komunikasi radio transceiver pada pita VHF dan UHF. Antena tersebut dirancang pada frekuensi 146 MHz dan masih dapat beresonansi dengan baik pada pita UHF dengan menambahkan elemen pengkompensasi berbentuk “T”. Material yang digunakan adalah kawat besi dengan diameter 4 mm. Antena J-Pole-T ini diuji untuk mendapatkan nilai-nilai frekuensi kerja, VSWR, return loss, lebar pita, gain, dan pola radiasi untuk selanjutnya dibandingkan dengan hasil simulasinya menggunakan CST Microwave Studio pada CST Studio Suite 2011. Pengujian juga dilakukan langsung menggunakan radio transceiver dan menggunakan antena radio lain sebagai pembanding. Berdasarkan hasil pengujian, antena J-Pole-T memiliki frekuensi kerja pada 148 MHz dengan nilai VSWR 1;1,1, sementara pada pita UHF didapatkan frekuensi kerja pada 454 MHz dengan nilai VSWR 1:1,05. Pola radiasi antena J-Pole-T menunjukkan pola omnidirectional. Hasil pengujian kualitatif pada skala laboratorium dengan mengimplementasikan antena J-Pole-T  pada radio transceiver juga menunjukkan bahwa antena J-Pole-T dapat memancarkan dan menerima sinyal sejauh 1.470 meter pada pita VHF dan 930 meter pada pita UHF.   Kata Kunci: antena J-Pole-T, VHF-UHF dualband, VSWR, omnidirectional     Abstract   Transceiver radio is a kind of wireless telecommunication system application that still commonly used nowadays. The term transceiver is used due to its function as transmitter and receiver at once. In this research, a dualband J-Pole antenna was simulated and implemented for transceiver radio communication at VHF and UHF band. This antenna is designed at frequency of 146 MHz and still able to resonate well at UHF band by adding a “T” shaped compensating element. The material used is an iron wire with diameter of 4 mm. That J-Pole-T antenna is measured to get the resonance frequency, VSWR, return loss, bandwidth, gain, and radiation pattern then compared to the simulation result using software CST Studio Suite 2011. Based on measurement results, the J-Pole-T antenna is resonating at frequency of 148 MHz with VSWR 1:1,1, while at the UHF band it is resonating at 454 MHz with VSWR 1:1,05. The radiation pattern of J-pole-T antenna is  showing an omnidirectional shape. The measurement result based on the laboratory scale also showed that the J-Pole-T antenna can transmit and receive radio signal as far as 1,470 meters at VHF band and 930 meters at UHF band. Keyword : J-Pole-T antenna, VHF-UHF dualband, VSWR, omnidirectional
IMPLEMENTASI TEKNOLOGI AUGMENTED REALITY SEBAGAI PANDUAN SALAT BERBASIS SISTEM OPERASI ANDROID Rahman, Luthfi; Sofwan, Aghus; Christyono, Yuli
Transmisi Vol 19, No 2 April (2017): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (652.675 KB) | DOI: 10.12777/transmisi.19.2.89-94

Abstract

Salat adalah salah satu bentuk ibadah wajib umat Islam kepada Allah SWT. Suatu kewajiban bagi umat Islam melaksanakan salat wajib 5 waktu setiap harinya. Diperlukan pembiasaan dan pemahaman yang baik tentang tata cara salat agar sesuai dengan tuntunannya. Maka dari itu diperlukan sebuah aplikasi untuk membantu mereka yang ingin belajar salat dengan memanfaatkan perkembangan teknologi informasi, sehingga pembelajaran dapat dilakukan dengan mudah dan interaktif. Untuk mewujudkan gagasan tersebut, dilakukan sejumlah metode penelitian antara lain studi literatur, pengumpulan informasi tentang tata cara salat yang benar, perancangan aplikasi menggunakan UML, dan implementasi aplikasi menggunakan teknologi augmented reality. Hasil dari Penelitian ini adalah sebuah aplikasi yang menerapkan teknologi augmented reality sebagai panduan tata cara salat pada perangkat berjalan berbasis sistem operasi Android. Untuk memastikan aplikasi dapat berjalan dengan baik, dilakukan sejumlah pengujian dan pengamatan performa di sejumlah perangkat. Dengan begitu diharapkan umat Islam pada umumnya dan umat Islam yang masih awam pada khususnya dapat mempelajari tata cara salat yang benar dengan mudah.
Alat Pelacak Lokasi Berbasis GPS Via Komunikasi Seluler Wijaya, Surya Purba; Christyono, Yuli; Sukiswo, Sukiswo
Transmisi Vol 12, No 2 (2010): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (335.97 KB) | DOI: 10.12777/transmisi.12.2.82-86

Abstract

Nowadays, the vehicle’s robbing or the usage of not allowed route is often happen. Therefore, vehicle tracking system is needed to reduce this risk. Vehicle tracking system is a system’s combination  that installed in the vehicle so that can be tracked by the owner or the third part. Modern vehicle tracking system usually use GPS to determine vehicle’s location. This system also usually have communication component such as cellular or satellite to send vehicle’s position to user in another place. In this Final Project, the vehicle tracking tool based on GPS via cellular  will be created. This tool is a part of vehicle tracking system. This tool will respond a command which is sent by tracker via SMS. The device contains of three parts. There are microcontroller as a control part, GPS which provide positioning information, and GSM modem which is used to send or receive message. All of these parts will cooperate to process all of the messages sent by tracker. Then server will get information about position in form of longitude, latitude, date and time. This device will be tested in case of receiving’s delay at tracker side, timer’s precision, location’s precision which is showed by GPS, vehicle tracking. Based on testing, there are varying receiving delay at traker side. Timer has  ran well so that getting data appropriate to the interval which is asked. Position which is showed by GPS is not precision in fact. However, the tracking can be done and similar with the fact in the field.Keyword :   GPS, vehicle tracking system, cellular communication
Studi Perbaikan Pengelolaan Perpustakaan dan Sistem Pengelolaan Arsip & Dokumen di PT Badak Iman Satoto, Kodrat; Fatchur Rochim, Adian; Christyono, Yuli; Handayani, Tri; Taufiq, Amin; Suharso, Putut
JURNAL SISTEM KOMPUTER Vol 1, No 1 (2011): Sistem dan Aplikasi Komputer
Publisher : JURNAL SISTEM KOMPUTER

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (13.724 KB)

Abstract

Library at PT Badak LNG Bontang East Kalimantan, store various types of collections such as contract documents, agreements, plant & equipment manuals, reference books, textbooks, technical brochures, documents and data supporting the project, certification documents, images refinery engineering techniques & equipment, magazines, journals and other collections. At this time the library management is still done manually, although some have been made in electronic information systems. Besides the libraries, archives and document management systems need to be improved to support the needs of the organization. From the results of auditing the International Safety Rating System (ISRs) conducted by Det Norske Veritas (DNV), the management of archives and documents need to be improved, especially for the storing and retrieval system for archives and documents can be done quickly and accurately. Utilization of information technology has also been applied, but need to be evaluated in order to meet the needs of each user. The document has been categorized as non-active documents, removed from their respective departments to the Records Center at the Department of Services to follow rules archive retention policy. While the document is still classified as active are still kept by each department. Creation, storing, organization and management of existing documents need to be thoroughly evaluated to facilitate storing and retrieval document fast and accurate.Index Terms — Library, Archive Storage, Retrieval System
Data Clustering Menggunakan Metodologi CRISP-DM Untuk Pengenalan Pola Proporsi Pelaksanaan Tridharma Budiman, Irwan; Prahasto, Toni; Christyono, Yuli
JSINBIS (Jurnal Sistem Informasi Bisnis) Vol 1, No 3 (2011): Volume 1 Nomor 3 Tahun 2011
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (504.898 KB) | DOI: 10.21456/vol1iss3pp129-134

Abstract

Quality of human resources faculty can be reflected from the implementation of productivity and quality Tridharma (education, research, community service  and  supporting  field  activities).  Lecturer  Workload  and Evaluation of  Higher Education  Tridharma  (BKD  and theEPT-PT)  aims  to  ensure  the  implementation  of  the  faculty  task  runs  according  to  the  criteria  set  out  in  legislation.  Data  clusteringTridharma  implementation is needed to  get  some  knowledge  of the  pattern of Tridharma  implementation  at  college.  Clustering  as a  data mining  technique  should be  scalable, reliable  and  meet  an  agreed  standard.  CRISP-DM is the standardization of  data mining  is  used  in this study. The results of data clustering found the pattern of proportion of Tridharma  into 3 clusters representing patterns: professionals, managers and teachers.Keywords : Clustering, CRISP-DM, K-Means, Tridharma
Co-Authors Achmad Hidayatno Adam, Nur Muhammad Adhe Setya Nugraha Adhieka Danniswara Adi Dhama Kameswara Adian Fatchur Rochim Afin M Nurtsani Aghus Sofwan Ajub Ajulian Zahra Macrina Akbar Satria Wardhana, Akbar Satria Amin Taufiq Anang Setiaji, Anang Anggie Salsa Saputra Anton Prabowo Arismunandar, Ridho Arsyahadij, Miftahuddin Athallah, Farrel Aulia Latifah Insan Firdausi Azizah, Mega Tiara Nur Baron Murianda Budi Setiawan Budi Setiyono Cosa Pamungkas Prabaswara Dania Eridani Darjat Darjat Dayanti, Jessy Kris Defriko Christian Dewandhika Dewi Lestari Faizin, Ahmad Arif Fakkar Robbi Radhian Faruq, Faishal Al Fendy Yulian Rakhmad Hafidz Erwin Kurniawan Hermawan, H Herry Totalis I Ketut Suada Ibnu Fauzan Al Aula IMAM SANTOSO Irwan Budiman Irwan Budiman Iwan Setiawan Jaka Windarta Karyadi, Atma Kodrat Imam Satoto Luluk Arifatul Chalida Luthfi Rahman, Luthfi M. Hidayat Al Rizqy Maman Soemantri, Maman Maman Somantri Mita Indriani Mochamad Arif Haryadi, Mochamad Arif Mohamad Adiwijaya, Mohamad Muhammad Fatkhur Rahman Munawar Agus Riyadi Nasution, Ali Napiah Naufal Qodari Ngatelan Ngatelan Nugraha, Satria Indra Nugroho, Bima Adhi Nugroho, Gilang Cahyo Nunditya, Devina Mirza P, Eskania Widya Pangestu, Febrian Ardi Putut Suharso R. Rizal Isnanto Radhitya Wiratama Rahmat Dwi Cahyo Rahmat Juniar Dwiansyah Raidah Hanifah Ramada, Raynaldi Surya Randi Dwi Wibisono Rizal Yunan Rifai Santoso, Imam Setiawan, Hadyan Setyo Suseno, Setyo Shulchul Chabib Achmad Sudjadi Sudjadi Sukiswo Sukiswo Sumardi . Surya Purba Wijaya Sutaryono, Agus Teguh Prakoso Toni Prahasto Tri Handayani Trias Andromeda Velayati Habsyah Wiratama, Radhitya Yoga Krismawardana Yunianto Panji Nugroho, Yunianto Panji Yustinus Denny Ardyanto