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All Journal ComTech: Computer, Mathematics and Engineering Applications
Djunaidy Santoso
Bina Nusantara University
Computer Science & IT Engineering Mathematics

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Journal : ComTech: Computer, Mathematics and Engineering Applications

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Perancangan Program Aplikasi Kriptografi Menggunakan Algoritma Magenta dengan Panjang Kunci 128 Bit Steffie Hugh Wibisono; Djunaidy Santoso
ComTech: Computer, Mathematics and Engineering Applications Vol. 1 No. 1 (2010): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v1i1.2240

Abstract

Along with the development of computer technology, the growing crimes against the computer. Crimes against the computer makes people increasingly competing to make the algorithms-algorithms that can maintain the confidentiality of data. Algorithms algorithm Magenta is one of the many algorithms that exist today. Magenta algorithms have been developed since 1990 by using a simple and transparent technique that can be implemented in hardware and software. First time algorithms are analyzed using the butterfly structure - the structure of the butterfly which was then replaced by a Fast Hadamard Transform (FHT) shuffle structure which has the advantage of providing some structure in each level. In 1994 there was a slight change in the use of hardware that was not processed according to plan so that now the algorithm used by Deutsche Telekom Magenta for secure management of sensitive data with 128-bit key length. These algorithms break the 128-bit key length into 16 blocks with each block containing the 8-bit and one other advantage of this algorithm is the recursive part is calculated repeatedly at each iteration.
Perancangan Program Sistem Pakar Berbasiskan Web untuk Rehabilitasi Medik Penderita Skoliosis Djunaidy Santoso; Vita Megawati
ComTech: Computer, Mathematics and Engineering Applications Vol. 3 No. 1 (2012): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v3i1.2462

Abstract

The application program created in this research is a web-based expert system program for medical rehabilitation of patients with scoliosis. The program aims to make consultation between users and the experts. With the expert system method based on components of medical science this application can help achieve thegoal, that is to make easier for people to recognize and prevent the occurrence of scoliosis, as well as to make easier for doctors making conclusions. Bu using this expert system, students can make decisions quickly when there are problems with Scoliosis disease.
Keuntungan Algoritma Bezier, B-Spline di Dunia Industri Djunaidy Santoso; Haryono Soeparno; Ayuliana Ayuliana
ComTech: Computer, Mathematics and Engineering Applications Vol. 4 No. 1 (2013): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v4i1.2790

Abstract

Graphic Computers are widely used in various fields, especially in industries, companies, banks and hospitals. At hospital, computer graphics with leading edge techniques support images related to patient's needs. Graphic computer can also be used for shipbuilding and automotive design, as well as decision-makers in an institution, using pictures or images that can be analyzed to produce good forms which the accuracy is still investigated (CAD and CAM). The purpose of research is linking algorithms by creating the right picture or image to a form required by decision makers to associate algorithms Hermite, Bezier, B-Spline in harmonious function of each, so that the curves, images or images are produced better, and can be used in the field of engineering drawings. This research produces an image/ shape/ image which are suitable for designers’ need. 
Hubungan Algoritma Bezier dan B-Spline pada Fungsi Harmonisnya untuk Menciptakan Bentuk Kurva Sesuai Keinginan Djunaidy Santoso; Zulfany Erlisa Rasjid; Edy Irwansyah
ComTech: Computer, Mathematics and Engineering Applications Vol. 2 No. 2 (2011): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v2i2.2821

Abstract

Computer graphics is a science widely used in any areas. Its up-to-date technique is applied to solve image problems related to needs of customer and decision-making. Images can be analyzed so as produce good form which its accuracy is still under researches using CAD and CAM. This study aims to associate algorithm Hermite, Bezier, B-Spline on its harmony function by creating a proper image to a form that can be used in drawing engineering for decision making. This study produces an adequate algorithm for image design. 
Co-Authors Ayuliana Ayuliana Edy Irwansyah Haryono Soeparno Steffie Hugh Wibisono Vita Megawati Zulfany Erlisa Rasjid