Jurnal ULTIMA Computing
urnal ULTIMA Computing merupakan Jurnal Program Studi Sistem Komputer Universitas Multimedia Nusantara yang menyajikan artikel-artikel penelitian ilmiah dalam bidang Sistem Komputer serta isu-isu teoritis dan praktis yang terkini, mencakup komputasi, organisasi dan arsitektur komputer, programming, embedded system, sistem operasi, jaringan dan internet, integrasi sistem, serta topik lainnya di bidang Sistem Komputer. Jurnal ULTIMA Computing terbit secara berkala dua kali dalam setahun(Juni dan Desember) dan dikelola oleh Program Studi Sistem Komputer Universitas Multimedia Nusantara bekerjasama dengan UMN Press.
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<![CDATA[Rancang Bangun Prototipe Sistem Multilateration 2-Dimensi Menggunakan Data ADS-B ]]>
<![CDATA[I Made Astawa]]>;
<![CDATA[Siswayudi Azhari]]>;
<![CDATA[I Putu Ananta Yogiswara]]>;
<![CDATA[Widrianto Sih Pinastiko]]>
<![CDATA[ Ultima Computing : Jurnal Sistem Komputer Vol 11 No 2 (2019): Ultima Computing : Jurnal Sistem Komputer ]]>
Publisher : <![CDATA[Faculty of Engineering and Informatics, Universitas Multimedia Nusantara ]]>
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DOI: 10.31937/sk.v11i2.1265
<![CDATA[Multilateration (MLAT) is a technology used to determine the position of an object by using a Time Difference of Arrival (TDOA). MLAT is used at airports as one of the sensors in the A-SMGCS system to determine the position of an aircraft or vehicle. Developing an MLAT system should ideally be done at the airport because it requires aircraft and vehicle objects that are already equipped with ADS-B transmitters, but developing an MLAT system at the airport requires high costs for equipment installation and licensing because it risks disrupting airport operations and can disrupt existing systems . The Center of Technology for Electronics - BPPT is developing the A-SMGCS system and is based in the serpong puspiptek area, where this area has a large enough area, making it possible to design prototypes of the MLAT system. Three ADS-B receivers are placed in three different buildings that are still connected to a computer network, so that data collection from each receiver can be done through the BPPT local network. The object to be calculated is using a car equipped with an ADS-B transmitter. To get more accurate results, every time the receiver is synchronized using GPS. The experimental results show that there is a difference between the position data sent by the ADS-B transmitter and the results of the MLAT calculation, this is due to the difference in height of the three receivers, accuracy of GPS and accuracy of the ADS-B receiver timestamp used. Although there are differences, the proof of concept design of this system is in accordance with the characteristics of the MLAT system. The benefit gained from the design of this prototype is that it can develop an MLAT system in a place that is not high risk with low cost but the results can be applied at the airport.]]>
<![CDATA[Analisis Kinerja Algoritma Quick Double Merge Sort Paralel Menggunakan openMP ]]>
<![CDATA[I Nyoman Aditya Yudiswara]]>;
<![CDATA[Abba Suganda]]>
<![CDATA[ Ultima Computing : Jurnal Sistem Komputer Vol 11 No 2 (2019): Ultima Computing : Jurnal Sistem Komputer ]]>
Publisher : <![CDATA[Faculty of Engineering and Informatics, Universitas Multimedia Nusantara ]]>
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DOI: 10.31937/sk.v11i2.1294
<![CDATA[Processor technology currently tends to increase the number of cores more than increasing the clock speed. This development is very useful and becomes an opportunity to improve the performance of sequential algorithms that are only done by one core. This paper discusses the sorting algorithm that is executed in parallel by several logical CPUs or cores using the openMP library. This algorithm is named QDM Sort which is a combination of sequential quick sort algorithm and double merge algorithm. This study uses a data parallelism approach to design parallel algorithms from sequential algorithms. The data used in this study are the data that have not been sorted and also the data that has been sorted is integer type which is stored in advance in a file. The parameter measured to determine the performance of the QDM Sort algorithm is speedup. In a condition where a large amount of data is above 4096 and the number of threads in QDM Sort is the same as the number of logical CPUs, the QDM Sort algorithm has a better speedup compared to the other parallel sorting algorithms discussed in this study. For small amounts of data it is still better to use sequential sorting algorithm.]]>
<![CDATA[Perancangan Teknik Kriptografi Block Cipher Berbasis Pola Tarian Sajojo Papua ]]>
<![CDATA[Dwayne Jeremy Euagellino Prihanto]]>;
<![CDATA[Magdalena Ineke Pakereng]]>
<![CDATA[ Ultima Computing : Jurnal Sistem Komputer Vol 11 No 2 (2019): Ultima Computing : Jurnal Sistem Komputer ]]>
Publisher : <![CDATA[Faculty of Engineering and Informatics, Universitas Multimedia Nusantara ]]>
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DOI: 10.31937/sk.v11i2.1454
<![CDATA[Cryptography is a science to maintain the security and confidentiality of an information. In this research we designed Block Cipher Cryptography 64 bit Based on Tarian Sajojo Papua Pattern to build new cryptography. In this critique is designed with 10 rounds, where each round there are 4 processes. In each round there are 4 patterns for the plaintext process and 4 patterns for the key process. In second and fourth process is transformed with S-BOX table to get a more random ciphertext. Testing is also done using Avalanche Effect and Correlation value where the average character change reaches 49,69%, so it can be used as an alternative in securing data.]]>
<![CDATA[Penerapan Metode Fuzzy AHP untuk Sistem Pendukung Keputusan Pemilihan Pemasok Terbaik ]]>
<![CDATA[Fenina Adline Twince Tobing]]>;
<![CDATA[M Iqbal Dzulhaq]]>;
<![CDATA[Ramzi Fajar Sidiq]]>
<![CDATA[ Ultima Computing : Jurnal Sistem Komputer Vol 11 No 2 (2019): Ultima Computing : Jurnal Sistem Komputer ]]>
Publisher : <![CDATA[Faculty of Engineering and Informatics, Universitas Multimedia Nusantara ]]>
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DOI: 10.31937/sk.v11i2.1455
<![CDATA[Keberadaan pemasok sangat menentukan kelancaran proses produksi dan produk yang akan dihasilkan. Masalah yang dihadapi perusahaan adalah proses evaluasi atau pemilihan pemasok terbaik masih bersifat manual, sulitnya menentukan pemasok mana yang memiliki performansi terbaik, keterlambatan datangnya bahan baku mengakibatkan keterlambatan proses produksi yang berujung pada tidak tercapainya jumlah produksi. Pada penelitian ini dibangun Sistem Pendukung Keputusan (SPK) untuk pemilihan pemasok terbaik menggunakan 4 kriteria yang disesuaikan dengan kondisi dan kebutuhan perusahaan yaitu harga, stok, delivery, dan mutu. Masing-masing kriteria tersebut akan dibobotkan menggunakan metode Fuzzy AHP. Pada implementasinya dihasilkan bobot kriteria harga sebesar 0,632, stok 0,352, delivery 0,084, mutu 0,107. Hasil pembobotan ini akan digunakan untuk mendukung penilaian pemasok terbaik dan akan diperoleh nilai masing-masing pemasok sehingga diketahui siapa pemasok terbaik]]>
<![CDATA[Implementasi Jaringan Saraf Tiruan Backpropagation untuk Pengenalan Karakter pada Dokumen Tercetak ]]>
<![CDATA[Alethea Suryadibrata]]>;
<![CDATA[Dian Puspita Chandra]]>
<![CDATA[ Ultima Computing : Jurnal Sistem Komputer Vol 11 No 2 (2019): Ultima Computing : Jurnal Sistem Komputer ]]>
Publisher : <![CDATA[Faculty of Engineering and Informatics, Universitas Multimedia Nusantara ]]>
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DOI: 10.31937/sk.v11i2.1456
<![CDATA[Digital documents from the scanner device cannot be edited. To be able to edit digital documents, Optical Character Recognition (OCR) technology is needed. This research was conducted with the aim of implementing backpropagation artificial neural networks in printed documents and to find out how the accuracy of the implementation of backpropagation artificial neural networks in printed documents. This research uses multilayer networks with three layers. The input layer consists of 225 nodes with 15 × 15 pixels digital image as input, hidden layer consists of 110 nodes, and the output layer consists of 54 nodes representing A-Z, a-z, point punctuation (.), and comma punctuation (,). The learning rate used in this research is 0,29. The average accuracy level obtained from the implementation of backpropagation artificial neural networks in this research was 94 % for Ms Arial Unicode font type, 96,6 % for Tahoma font type, and 94 % for Times New Roman font type.]]>
<![CDATA[Rancang Bangun Perangkat Belajar Braille Elektronik Berbasis Raspberry Pi ]]>
<![CDATA[Hidayat hidayat]]>;
<![CDATA[Muhammad Yusuf]]>
<![CDATA[ Ultima Computing : Jurnal Sistem Komputer Vol 12 No 1 (2020): Ultima Computing : Jurnal Sistem Komputer ]]>
Publisher : <![CDATA[Faculty of Engineering and Informatics, Universitas Multimedia Nusantara ]]>
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DOI: 10.31937/sk.v12i1.1541
<![CDATA[The aim of the present research was to design and implement a braille electronic learning device for helping children who are blind in studying. The method used was an experimental method that includes the study of literature, the design process, the process of implementing tool manufacturing and also functional testing. This is made easier for blind people to learn to arrange words, translate words. The system designed consists of the Raspberry Pi as the main data processor, six push-buttons as input for braille codes, five push-buttons as control buttons, external MMC memory as a storage place for the operating system documents used by Raspberry Pi and also as a storage place for digital information such as applications that are made and also voices and the speaker functions as voice output, and also the LCD functions to display letters or numbers entered by users, it is only intended for teachers or instructors who can see when accompanying blind students. The overall system test results produce the expected output, which can speak words or numbers and translate words in two languages (Bahasa-English) correctly.]]>
<![CDATA[Implementasi Kanopi Otomatis untuk Kenyamanan Termal ]]>
<![CDATA[Jason Adrian Mahalim]]>;
<![CDATA[Filipus Samuel]]>;
<![CDATA[Filbert Wijaya]]>;
<![CDATA[Muhamad Aliefian Rahmatulloh]]>
<![CDATA[ Ultima Computing : Jurnal Sistem Komputer Vol 12 No 1 (2020): Ultima Computing : Jurnal Sistem Komputer ]]>
Publisher : <![CDATA[Faculty of Engineering and Informatics, Universitas Multimedia Nusantara ]]>
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DOI: 10.31937/sk.v12i1.1605
<![CDATA[Aktivitas manusia tidak akan pernah terlepas dari kegiatan luar ruangan. Namun karena pengaruh cuaca, aktivitas tersebut bisa terganggu seketika. Atas masalah tersebut, kami membuat proyek berupa kanopi otomatis yang bisa mendeteksi cuaca dan intensitas cahaya. Mikrokontroler yang digunakan pada proyek ini adalah Arduino Uno. Untuk mendeteksi intensitas cahaya matahari, sensor yang digunakan adalah Light Intensity Sensor, dan sensor yang digunakan untuk mendeteksi kondisi cuaca adalah sensor hujan. Tujuan dibuatnya proyek ini adalah untuk meningkatkan kenyamanan termal yang dimiliki oleh setiap orang ketika beraktivitas di luar ruangan. Kata Kunci : Kanopi, Arduino, Kenyamanan Termal]]>
<![CDATA[Sistem Pendeteksi Pencemaran Udara Portabel Menggunakan Sensor MQ-7 dan MQ-135 ]]>
<![CDATA[Arida Amalia Rosa]]>;
<![CDATA[Bryan Alexis Simon]]>;
<![CDATA[Kevin Sherdy Lieanto]]>
<![CDATA[ Ultima Computing : Jurnal Sistem Komputer Vol 12 No 1 (2020): Ultima Computing : Jurnal Sistem Komputer ]]>
Publisher : <![CDATA[Faculty of Engineering and Informatics, Universitas Multimedia Nusantara ]]>
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DOI: 10.31937/sk.v12i1.1611
<![CDATA[Keterbatasan indera penciuman manusia mendeteksi keberadaan gas gas yang tidak terlihat dapat membahayakan kesehatan. Oleh sebab itu, diperlukan suatu alat pendekteksi dalam pencemaran udara, sehingga menjadi acuan guna untuk mengetahui tingkat pencemaran udara tersebut. Untuk mendeteksi kadar polusi udara menggunakan sensor gas MQ-7 yang peka terhadap gas karbon monoksida, stabil dan berumur panjang, dan sensor gas MQ-135 yang dapat digunakan untuk menentukan kadar konsentrasi gas amonia, bensol, alkohol. Dan untuk tampilan menggunakan LCD yang sebelumnya di proses oleh mikrokontroler Arduino nano.]]>
<![CDATA[Penggunaan Keran Air Otomatis dalam Penghematan Air ]]>
<![CDATA[Antonius Rildo Pramudya]]>;
<![CDATA[Alfeto Alfeto]]>;
<![CDATA[Chaterine Cristianti]]>
<![CDATA[ Ultima Computing : Jurnal Sistem Komputer Vol 12 No 1 (2020): Ultima Computing : Jurnal Sistem Komputer ]]>
Publisher : <![CDATA[Faculty of Engineering and Informatics, Universitas Multimedia Nusantara ]]>
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DOI: 10.31937/sk.v12i1.1612
<![CDATA[Water is an important source for human life. Nowadays, clean water has begun to be rare and therefore it is necessary to conserve water. In this study we made an automatic water faucet to fill the container. The use of this automatic tap aims to stop the water flow when the filled container reaches the desired height. The tools used are Arduino uno, ultrasonic sensors, solenoid valves, and potentials. Before use the appliance must be calibrated first before being used daily. However, in an automatic water faucet experiment it will only stop based on the height set by us. Index Terms : Water faucet, ultrasonic sensor, arduino uno, solenoid valve.]]>
<![CDATA[Passive Keyless Entry Locking Door With ESP32 ]]>
<![CDATA[Arya Wibisono]]>;
<![CDATA[MB Nugraha]]>
<![CDATA[ Ultima Computing : Jurnal Sistem Komputer Vol 12 No 1 (2020): Ultima Computing : Jurnal Sistem Komputer ]]>
Publisher : <![CDATA[Faculty of Engineering and Informatics, Universitas Multimedia Nusantara ]]>
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DOI: 10.31937/sk.v12i1.1613
<![CDATA[in this modern era, technology is increasingly sophisticated and can be used by anyone, for example, is a lock that can be bought by anyone and is easy to learn. Therefore, the physical key is getting old and easy to be broken by anyone. By implementing a passive keyless entry system that has been applied to today's cars, adding to the safety and comfort of the car user. we try to apply the system to ESP32 and make digital keys in this research still lacking in card security systems using digital signature algorithms, passive keyless entry systems run as expected by using RFID as input identifier from the UID of each RFID card which is proven to be unique and easy to use.]]>
