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All Journal Riau Journal of Computer Science JURNAL MEDIA INFORMATIKA BUDIDARMA KOMIK (Konferensi Nasional Teknologi Informasi dan Komputer) Jurnal Sistem Informasi Kaputama (JSIK) IT (INFORMATIC TECHNIQUE) JOURNAL Journal of Computer Networks, Architecture and High Performance Computing Jurnal J-PEMAS JAIA - Journal of Artificial Intelligence and Applications JOMLAI: Journal of Machine Learning and Artificial Intelligence SATIN - Sains dan Teknologi Informasi ULINA: Jurnal Pengabdian kepada Masyarakat Jurnal Ilmu Komputer dan Sistem Informasi Jurnal Pengabdian Masyarakat Jurnal Penelitian Multidisiplin Bangsa
Leman, Dedi
Universitas Potensi Utama Medan
Religion Aerospace Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Library & Information Science Public Health Social Sciences

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Journal : Riau Journal of Computer Science

 1 
LOAD BALANCING 2 JALUR INTERNET MENGGUNAKAN MIKROTIK ROUND ROBIN Leman, Dedi
Riau Journal Of Computer Science Vol. 5 No. 2 (2019): Riau Journal of Computer Science
Publisher : Riau Journal Of Computer Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (344.322 KB)

Abstract

Many of us have encountered Internet use, especially in internet cafes, offices, schools and campuses using more than one connection in subscribing to the Internet, whether it's different ISPs (Internet Service Providers) or the same ISP. In accessing the Web there are 2 types, namely with Authentication and without Authentication. At this writing the author uses 2 (two) Asymmetric Digital Subscriber Line or ADSL connections up to 3 Mbps from an Internet Service Provider (ISP). Cluster architecture that is implemented as a high-performance server is one of the effective and efficient solutions to overcome this problem. This cluster architecture can be built using the concept of network load balancing with high-availability that allows the processing of data to be distributed in a distributed manner to several computers. In Linux virtual servers there are scheduling algorithms that can affect LVS work systems, one of which is the round robin algorithm. By using a round robin algorithm, the workload will be shared equally across all servers. Round robin algorithm testing is done by using parameters comparing the number of users and response times, so that the response time is stable between 31 ms to 76.3 ms with the number of users between 10,000 and 50000 in load balancing implementation using the round robin algorithm
SMART SCHOOL MANAGEMENT INTEGRASI DENGAN FINGERPRINT Leman, Dedi
Riau Journal Of Computer Science Vol. 6 No. 1 (2020): Riau Journal of Computer Science
Publisher : Riau Journal Of Computer Science

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Abstract

The teaching-learning process that is currently running at the vocational school in Medan is still largely conventional in nature, the teacher conveys subject matter, assignments, quizzes, collection assignments in class and each subject are only done a few meetings a week with limited time. Submission of information / announcements, management and services Academic administration and reporting are still done manually so that it is slow and not effective. The purpose of this study is to create a smart school design with a system web-based online learning to overcome various problems faced by Vocational school in Medan (case study at Vocational Tritech Informatics Medan). Smart school will to be blended learning that combines conventional methods or faces with an online learning system towards smart school. The results of this study are the creation online learning system models so that interaction between teachers and students can be done whenever and wherever to improve the quality of education and administrative management academic as well as accelerating the delivery of information to students and parents about students the development and achievements of each student. And use a fingerprint that is directly integrated with the system to be designed. This can support learning in school and creating a culture / learning environment that is effective and efficient and paperless. Design Smart School software uses the waterfall method which includes five stages, namely: (1) identification of user needs; (2) analysis; (3) design; (4) implementation; and (5) testing. Smart school system design uses object-oriented modeling language, UML (Unified Modeling Language).
METODE MERKLE HELLMAN UNTUK ENKRIPSI DAN DEKRIPSI PESAN WHATAPP Leman, Dedi; Rahman, Maulia
Riau Journal Of Computer Science Vol. 6 No. 1 (2020): Riau Journal of Computer Science
Publisher : Riau Journal Of Computer Science

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Abstract

Encryption is a method of changing message data (plaintext) into password data (ciphertext), while decryption is a method of converting ciphertext to plaintext. WhatsApp Messenger is a messaging application for smartphones that is basically similar to BlackBerry Messenger. The WhatsApp Messenger application uses a 3G, 4G or WiFi internet connection for data communication. By using WhatsApp, we can do online chat, share files, exchange photos and so on. The algorithm used is 2 (two) types, namely symmetric algorithms and asymmetries algorithms. Merkle-Hellman Knapsack is a cryptosystem that uses the asymmetries algorithm. The Merkle-Hellman Knapsack implementation used uses xor logic. The key length is used between 8 to 72 bits. This capability makes Merkle-Hellman Knapsack have strong security with a short key length. Whereas the aim to be achieved is to apply the Merkman-Hellman Knapsack cryptosystem using the Visual Studio 2010 Programming Language
Sistem Pencegahan Kecelakaan Pada Remaja Dengan Pemantauan Kecepatan Kendaraan Berbasis GPS dengan Pesan Sebagai Media Pengiriman Data (Studi Kasus : Sekolah SMK Tritech Informatika Medan) Dedi Leman; Labuan Nababan
RJOCS (Riau Journal of Computer Science) Vol. 5 No. 1 (2019): Riau Journal of Computer Science
Publisher : RJOCS (Riau Journal of Computer Science)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (442.399 KB) | DOI: 10.30606/rjocs.v5i1.1701

Abstract

In adolescence humans cannot be called adults but also cannot be called children. Adolescence is a human transition from children to adults. Nowadays someone is looking for identity, many teenagers are wrong in getting along, including racers, because teens that use transportation are one of the choices of the community to support their daily activities. The number of transportation accidents on the highway Indonesia can answer high. Repair motorbikes and increase speed on city roads so that it is directly proportional to avoiding accidents. To reduce the number of accidents because the driver is increasing, it is necessary to improve the driver Follow the Attendance System, the parties involved can find out about the driver and often provide proven facts about the specified speed limit. The Global Positioning System (GPS) application in the transportation sector, especially in the speed system for motorbike riders, is an integration of three technologies, namely GPS positioning technology
Co-Authors Adil Setiawan Akbar, Muhammad Barkah Cindy Paramitha Lubis Cindy Paramitha Lubis Dinda Hudayana Hsb Dini Ridha Dwiki Putri Edy Victor Haryanto Elvin Syahrin frans ikorasaki frans ikorasaki Harahap, Nurmahendra Hari Ramadhan Jenriko Sahat Sinaga Labuan Nababan M. Irfan Aldy Nasution Maulia Rahman Muhamad Rizky Fajar Utomo Muhammad Hari Ramadhan Nababan, Labuan Noprita Elisabeth S Obedh Eliezer Sidauruk Ramadhan, Hari Ratna Wardani Syahrin, Elvin