Articles

ANALISIS DAN PERANCANGAN VLAN PADA DISHUBKOMINFO KABUPATEN MANGGARAI MENGGUNAKAN CISCO PACKET TRACER Pantu, Yosefina; Iswahyudi, Catur; Rachmawati K, Rr Yuliana
Jurnal Jarkom Vol 3 No 1 (2015): Juni 2015
Publisher : Jurnal Jarkom

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Department of Transportation, Communication and Information of Manggarai Regency, is one of the instance of Regional Government of Manggarai, NTT, which is responsible to help the Head of Region concerning transportation, communication and information affairs. The lackness of human resources which was competent in computer networking, the high cost of VSAT IP Broadband internet service and maintenance cost of network’s backbone which is wireless based, have been becoming a problem to the Department concerning their main duties. As an impact, it is necessary to the Department to change their network’s backbone to wired network based, using VLAN. VLAN can divide network into several segments with low cost implementation. The using of VLAN Trunking Protocol (VTP) will ease the network administrator in managing VLAN. The VLAN design in this study used hierarchical model. The logical layer for data distributing was divided into two layers, core/distribution and access layer. Routing between VLANs used “router-on-a-stick using trunk” model, so that the workstations which were owned by different VLAN can communicate each other by using one router only. By using simulation method for testing the design, it was discovered that all workstations between different VLAN have been successfully connected each other and all servers were well-functioned.
MEMBANGUN SISTEM MANAJEMEN PERGUDANGAN MENGGUNAKAN ARSITEKTUR THREE-TIER -, Anggreawan; Hamzah, Amir; Iswahyudi, Catur
Jurnal Jarkom Vol 3 No 2 (2015): Desember 2015
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Three-tier architecture is an innovation of client server architecture. In the three-tier architecture, there are services presentation or user interface logic is placed on the client machine. Issued on the business logic and the client code is placed in the middle level. Data services layer contains the database server. Each level in the three-tier models are on a separate computer. Three-tier model concept is a concept that divides functionality into layers, applications gain scalability, and security. Currently the system at PT. Ungaran Sari Garment has been computerized in handling the transaction flow of goods in and out. However, the application still has the disadvantage that the application can only be used by a single computer (stand alone) and standard office without any database and system well. With the advantages of three-tier architecture, then build warehouse management system using three-tier architecture to assist in arranging entry and exit of goods to the warehouse, making the system more efficient in terms of use. Results from this study is the implementation of the warehousing system with three-tier architecture using SQLyog as its database can be used to input data entry and exit of goods to the warehouse, checking periodically warehousing reports in accordance with the functionality of each admin. By using a three-tier architecture as not to burden-sharing functionality on the server side and the client, because can use any computer that has been given permission by the server and are interconnected by a network. On the client side is only installation any web browser
TEKNOLOGI 4G PADA JARINGAN GSM UNTUK KEBUTUHAN MOBILE INTERNET DI KOTA YOGYAKARTA Santoso, Bambang Wahyu; Iswahyudi, Catur; Triyono, Joko
Jurnal Jarkom Vol 3 No 2 (2015): Desember 2015
Publisher : Jurnal Jarkom

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The rise of 4G LTE networks with all the benefits can promise super-fast mobile data communications. Currently in Yogyakarta has been present 4G LTE technology that can be enjoyed by a few people, it is certainly affected by 4G device such a sim card 4G different sim cards 3G, data packets are used, a mobile device that supports 4G technology, as well as the area of coverage signal 4G uneven, to the area of signal coverage 4G in Yogyakarta city can be seen on the website of the network operator Indosat, and XL with coverage in the form of network points, but what about the location of base stations 4G on each network operator gsm, as well as the results of field testing on 4G signal quality in Yogyakarta. Surely this is a question of its own for some parties, who want speed internet at a faster devices using 4G signal.To answer these questions do research on signal quality 4G in Yogyakarta. With this research is expected that people who want to enjoy the services of 4G technology can determine the location of the nearest 4G base stations, the maximum distance 4G signal, optimal distance to be able to enjoy 4G services. and people can also knew the distribution pattern 4G signal in Yogyakarta city.
ANALISIS DAN PERANCANGAN VLAN PADA DISHUBKOMINFO KABUPATEN MANGGARAI MENGGUNAKAN CISCO PACKET TRACER Pantu, Yosefina; Iswahyudi, Catur; K, Rr Yuliana Rachmawati
Jurnal Jarkom Vol 3 No 2 (2015): Desember 2015
Publisher : Jurnal Jarkom

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Abstract

Department of Transportation, Communication and Information of Manggarai Regency, is one of the instance of Regional Government of Manggarai, NTT, which is responsible to help the Head of Region concerning transportation, communication and information affairs. The lackness of human resources which was competent in computer networking, the high cost of VSAT IP Broadband internet service and maintenance cost of network’s backbone which is wireless based, have been becoming a problem to the Department concerning their main duties. As an impact, it is necessary to the Department to change their network’s backbone to wired network based, using VLAN. VLAN can divide network into several segments with low cost implementation. The using of VLAN Trunking Protocol (VTP) will ease the network administrator in managing VLAN. The VLAN design in this study used hierarchical model. The logical layer for data distributing was divided into two layers, core/distribution and access layer. Routing between VLANs used “router-on-a-stick using trunk” model, so that the workstations which were owned by different VLAN can communicate each other by using one router only. By using simulation method for testing the design, it was discovered that all workstations between different VLAN have been successfully connected each other and all servers were well-functioned.
Image Encryption on Mobile Phone Using Super Encryption Algorithm Setyaningsih, Emy; Iswahyudi, Catur
TELKOMNIKA Telecommunication, Computing, Electronics and Control Vol 10, No 4: December 2012
Publisher : Universitas Ahmad Dahlan

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This study aims to obtain the digital image encryption algorithm with a simple but secure process, fast and efficient computing resources. The algorithms developed in this study were super-encryption algorithm that combines two of cipher called Playfair cipher and the Vigenere cipher. To improve security, a keystream generator was used to randomize the order of the next key in Vigenere cipher. In order to evaluate performance, the proposed algorithm was measured through a series of tests. These tests were implemented with Matlab included visual test and histogram analysis, information entropy, encryption quality, correlation analysis, and also time analysis. The test results show that cipher  image looks visually random.The image histogram of the plain image and cipher image also seen a significant difference between the two of them. Testing was also performed on mobile phones with Symbian and BADA operating system based on Java Micro Edition Programming. Trial results show that the algorithm was require less computational resources; with average time for image encryption is 3.76 seconds, and the average time  for image decryption is 0.97 seconds. The new proposed image encryption scheme has satisfactory security which makes it a potential candidate for encryption of image data.   Keywords:  Image encryption, Vigenere cipher, Playfair cipher, Security test
IMPLEMENTASI ROUTING OPEN SHORTEST PATH FIRST (OSPF) MELALUI TUNNEL OPEN VPN Mulyadin, Tri; Sholeh, Muhammad; Iswahyudi, Catur
Jurnal Jarkom Vol 4 No 2 (2016): Desember 2016
Publisher : Jurnal Jarkom

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To connect the office with another office in different location, it takes the transmission media for data communication. one of the transmission media that can be used is Open VPN using the internet. OSPF routing required to connect all routers in the network using a VPN.OSPF routing on the Open VPN network, could be a solution for companies who want to build a network to connect multiple offices in different locations with a network.The implementation of OSPF routing in the Open VPN network uses three pieces of routerboard with one public IP. The testing is done by analyzing the process of selection of routing line, analysis of time speed of convergence, analysis of speed is the literature study, simulation to the virtualbox, and implementation to test-bed network.The test results convergence time using the same ISP is55,28 seconds and using a different ISP is 55,seconds. Test results on the routing update process with the same ISP is 7,23 and 9,63 seconds using a different ISP. Overall the OSPF routing on the Open VPN networks able to work well with convergence time and time routing updates fast and up to date
SISTEM INFORMASI GEOGRAFIS DALAM PENCARIAN LOKASI MUSEUM DI DAERAH ISTIMEWA YOGYAKARTA prabowo, eko tresno; Sholeh, Muhammad; Iswahyudi, Catur
Jurnal Script Vol 1, No 1 (2013): Edisi Desember 2013
Publisher : Jurnal Script

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 Museum is  one of many attraction.destination at Yogyakarta. The presence of Geographic Information Systems would be very helpful to show complete information, and become tool to searching route of museum location to arrive there using route of Trans Jogja as used vehicles.The system is built using a web-based programming using the CodeIgniter framework, with a MySQL database. Maps feature  in this study using the Google Map API. Google also supports for the manufacture of Trans Jogja path which will be integrated with the location of the museum.This Geographic Information System has a feature to search the museum, museum location search, search route to the museum using Trans Jogja, in this system there are also articles or news related to the existing museum. Using Geographic Information Systems museum is expected to be petrified visitors in search of a variety of information museums in District of Yogyakarta.Keyword : GIS, Museum, Route, Trans Jogja, Google Map. 
APLIKASI MOBILE GAME EDUKASI MATEMATIKA BERBASIS ANDROID APPLICATION OF EDUCATION MOBILE GAMES FOR MATH BASED ON ANDROID Aprilianti, Yunis; Lestari, Uning; Iswahyudi, Catur
Jurnal Script Vol 1, No 1 (2013): Edisi Desember 2013
Publisher : Jurnal Script

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ABSTRACT The development of mobile device technology today is very fast , mobile devices can be used not only as a media of communication but also as a media of entertainment . One of popularfeatures  on mobile devices is a game . In this case the game is not only used to entertain but also used as a media that gives lessons .This game is developed for a mathematical that contains material from VI grade of Elementary School . The game has 3 levels that can be selected by the players and also the material that can be accessed by the player before starting the game . The design of this game uses the accelerometer in the android operating system integratedwith Box2D Physics Engine Library . In addition , this game was built using the Framework of Libgdxand using Java programming language and also CorelDraw X5 , and Adobe Photoshop tools. The design and manufacture of this game is aimed to attract children aged equivalent of sixth grade elementary school students in learning mathematics . Keyword : math game, VI grade of Elementary School, android.
IMPLEMENTASI METODE INTERNET SEHAT PADA JARINGAN KOMPUTER WIRELESS DI MASJID AL AMIN BERBAH Hariman, Isa; Sholeh, Mohammad; Iswahyudi, Catur
Jurnal Jarkom Vol 1, No 1 (2013): Edisi Desember 2013
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ABSTRACT The development of computer network technology growing rapidly in line with the needs of the community information service that uses computer networks. The need for the use of the Internet in society based so that all parts of society in Indonesia has knowledge of information technology. The mosque is used as a medium for the spread of the Internet due to the expected future output of the deployment of information technology knowledge will be of good content and useful to society. By using this method as a way to surf the internet sound is good and right that will be implemented into the wireless computer networks in the mosque. Healthy internet methods are implemented on the wireless computer networks using a proxy server that will be implemented some security configuration that is OpenDNS, Squid, IPTables and Dansguardian. From the security configuration is tested one at a time by accessing the content of some categories of negative examples to test the efficacy in blocking sites or negative content from the proxy server before. From the research, the combination of multiple security configurations will be selected based on the advantages and disadvantages that will be used so the proxy server. From the entire configuration will be secure wireless computer networks in the mosque Al Amin Berbah. The implementation of the method on a healthy internet wireless computer network at the mosque will produce a safe way to surf from all negative content. Users can surf the internet without being distracted by negative content. Keywords: Healthy Internet, Proxy Server, Mosque.
SISTEM INFORMASI PENYEDIA LAYANAN PERANGKAT LUNAK GRATIS UNTUK IDEVICE BERBASIS WEB Widianto, Wahyu; Hamzah, Amir; Iswahyudi, Catur
Jurnal Script Vol 1, No 2 (2014): EDISI JANUARI 2014
Publisher : Jurnal Script

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ABSTRACTiOS operating system (i Operation system) Apple is growing rapidly and rise in popularity since it was first released. Moreover, the software that supports it, by building an information system software providers. This system is an information system that provides information software to allow the iDevice  users in searching free software. On information systems software service providers are free to iDevice option menus. These menus are fitur system option for visitors to use in selecting and sorting software that visitors are looking for, such as category, menu search and tag (label) that distinguishes software supporting the device. The information system service provider develoved with PHP and CMS systems that is content management system. This study successfully implemented CMS method with the end result in the form of information systems service providers free software for web-based iDevice. With several advantages, namely a simple web interface, which allows visitors to view a search software, information systems service providers free software for web-based iDevice serves as a search tool for software iDevice users of the iPhone, iPod and iPad. Key Words: Apple, Information system, iDevice, Software.