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INDONESIA
ComTech: Computer, Mathematics and Engineering Applications
Published by Universitas Bina Nusantara
ISSN : 20871244     EISSN : 2476907X     DOI : -
Core Subject : Science, Education, Engineering,
Computer Science & IT Engineering Mathematics
The journal invites professionals in the world of education, research, and entrepreneurship to participate in disseminating ideas, concepts, new theories, or science development in the field of Information Systems, Architecture, Civil Engineering, Computer Engineering, Industrial Engineering, Food Technology, Computer Science, Mathematics, and Statistics through this scientific journal.
Arjuna Subject : -
Articles 1,585 Documents
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The Power of the Test for the Winsorized Modified Alexander-Govern Test Ochuko, Tobi Kingsley; Abdullah, Suhaida; Zain, Zakiyah; Yahaya, Sharipah Syed Soaad
ComTech: Computer, Mathematics and Engineering Applications Vol 7, No 4 (2016): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v7i4.3764

Abstract

This research examined the usage of the parametric method in comparing two or more means as independent group test, for instance, the Alexander-Govern (AG) test. The utilization of mean as the determinant for the center of distribution of variance diversity takes place in testing, and the test provides excellence in maintaining the amount of Type I error and giving immense sensitivity for a regular data. Unfortunately, it isineffective on irregular data, leading to the application of trimmed mean upon testing as the determinant for the center of distribution under irregular data for two group condition. However, as the group quantity is more than two, the estimator unsuccessfully provides excellence in maintaining the amount of Type I error. Therefore, an estimator high in effectiveness called the MOM estimator was introduced for the testing as the determinant for the center of distribution. Group quantity in a test does not affect the estimator, but it unsuccessfully providesexcellence in maintaining the amount of Type I error under intense asymmetry and unevenness. The application of Winsorized modified one-step M-estimator (WMOM) upon the Alexander-Govern testing takes place so that it can prevail against its drawbacks under irregular data in the presence of variance diversity, can eliminate the presence of the outside observation and can provide effectiveness for the testing on irregular data. Statistical Analysis Software (SAS) was used for the analysis of the tests. The results show that the AGWMOM test gave the most intense sensitivity under g = 0,5 and h = 0,5, for four group case and g = 0 and h = 0, under six group case, differing from three remaining tests and the sensitivity of the AG testing is said suffices and intense enough.
Dampak Implementasi Erp dalam Perbaikan Sistem Distribusi pada PT. Semen Gresik Karmawan, I Gusti Made
ComTech: Computer, Mathematics and Engineering Applications Vol 4, No 2 (2013): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v4i2.2675

Abstract

This study describes how to implement an ERP system at PT Semen Gresik and compares the positive and negative effects of the implementation in the distribution process improvement. The benefits that can be obtained from this paper is obtaining information of how to implement an ERP system and the positive and negative effects of ERP implementation at PT Semen Gresik in the distribution process improvement. This study was done through documentation review to obtain the description of distribution process in the inventory material planning at PT Semen Gresik. The study resulted in a comparison between the positive and negative aspects as an effect from ERP implementation process at PT Semen Gresik in distribution process improvement. The ERP implementation process at PT Semen Gresik does not only provide more efficiency and effectiveness of distribution system, but also consequences of the impact from the effectiveness and efficiency obtained.
Pengukuran Resiko Manajemen Proyek Teknologi Informasi pada PT MSI Hendarti, Henny; Arifin, Firman; Deviaty, Desy
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.v2i2.2812

Abstract

Pengukuran resiko manajemen proyek teknologi informasi ini bertujuan untuk mengetahui bagaimana penerapan manajemen proyek teknologi informasi (TI) berjalan pada PT MSI agar penerapannya dapat sesuai dengan tujuan bisnis yang diharapkan oleh perusahaan dan memperkirakan resiko-resiko apa yang mungkin terjadi. Metode penelitian yang digunakan adalah studi kasus di mana teknik pengumpulan data meliputi studi kepustakaan serta studi lapangan yang meliputi wawancara, kuesioner, dan studi dokumentasi. Pendekatan untuk melakukan pengukuran resiko teknologi informasi pada PT MSI adalah PMBOK (Project Management Body Of Knowledge). Hasil yang dicapai adalah ditemukannya resiko-resiko yang mungkin terjadi pada proyek. Simpulan dari penelitian ini adalah PT MSI sudah menerapkan manajemen proyek teknologi informasi dengan cukup baik melalui proses inisiasi, perencanaan, pelaksanaan dan pengendalian, evaluasi proyek dan penutupan proyek. Hal ini dilihat resiko yang ditemukan tidak banyak dan hanya dibutuhkan sedikit perbaikan dalam mengelola resiko pada proyek tersebut. Namun perusahaan belum melakukan pengukuran terhadap resiko manajemen proyek TI. 
Benthix VR: A Virtual Reality Simulation Application to Preserve Traditional Benthik Game Setiawan, Abas; Nugraha, Alvin Satria; Haryanto, Hanny; Gamayanto, Indra
ComTech: Computer, Mathematics and Engineering Applications Vol 8, No 4 (2017): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v8i4.4036

Abstract

This research aimed to preserve Benthik traditional game using Benthix VR. Benthix VR used the Virtual Reality Interface Design (VRID) development model. The development phase of the VRID model started from High Level to Low-Level phase. The High-Level Design (HLD) phase consisted of identifying data elements and multiple objects, and modeling component objects. The output from the HLD phase would be input to the Low-Level Design (LLD) phase. The LLD phase was a phase of repetition and fine-tunes from the modeling of several component objects thoroughly. Testing of Benthix VR was conducted on 34 respondents with five assessment aspects. Those were enjoyment, realism, interactivity, usability, and impact. The average result of the questionnaire assessment of all aspects is 3,18824. These results indicate that users feel that Benthix VR is comfortable, realistic, interactive, and fascinating. Moreover, they are also interested in playing Benthik in the real world after using the application.
Implementasi Jaringan Syaraf Tiruan Recurrent Menggunakan Gradient Descent Adaptive Learning Rate and Momentum Untuk Pendugaan Curah Hujan Salman, Afan Galih; Prasetio, Yen Lina
ComTech: Computer, Mathematics and Engineering Applications Vol 2, No 1 (2011): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v2i1.2707

Abstract

The artificial neural network (ANN) technology in rainfall prediction can be done using the learning approach. The ANN prediction accuracy is measured by the determination coefficient (R2) and root mean square error (RMSE). This research implements Elman?s Recurrent ANN which is heuristically optimized based on el-nino southern oscilation (ENSO) variables: wind, southern oscillation index (SOI), sea surface temperatur (SST) dan outgoing long wave radiation (OLR) to forecast regional monthly rainfall in Bongan Bali. The heuristic learning optimization done is basically a performance development of standard gradient descent learning algorithm into training algorithms: gradient descent momentum and adaptive learning rate. The patterns of input data affect the performance of Recurrent Elman neural network in estimation process. The first data group that is 75% training data and 25% testing data produce the maximum R2 leap 74,6% while the second data group that is 50% training data and 50% testing data produce the maximum R2 leap 49,8%.
E-Marketing Jaya Abadi Computer (JAC) Honni, Honni; Raymond, Raymond; Johni, Johni; Tan, Wendi
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.v2i2.2846

Abstract

Internet has been widely used by manufacturers and distributors to expand product markets for its advantageous in quick process, practicality and low cost. Jaya Abadi Computer (JAC) as a sales distributor and service agent of computer equipment still perform its direct marketing manually on the spot, so that the marketing only reaches a small scope. This article analyzes the market opportunity of JAC; determines the marketing strategy and builds e-marketing website for JAC based on customer experience using The Seven Stage Cycle of Internet Marketing. The results obtained are an e-marketing website to support the marketing activities of JAC. Eventually it can be concluded that by building an e-marketing, JAC can reach as well as expand market opportunities in virtual world, use the right marketing strategy, and meet customer needs through features on the website. 
The Development of Furniture Assembly Instruction Based on Augmented-Reality Hartanto, Hugo Adrian; Makrie, Irena Krishanti; Yesmaya, Violitta; Halfian, Permana Gustav
ComTech: Computer, Mathematics and Engineering Applications Vol 10, No 2 (2019): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v10i2.5853

Abstract

This research utilized Augmented Reality (AR) technology along with interactive multimedia applications to improve visual guidance and assist nonexpert users in assembling furniture. Rather than paperbased or video instructions, AR enhanced learning and manipulative-interactive approach. This research used the Waterfall model for development. It was divided into a couple of stages. It consisted of specifying the problem and requirements, designing the system, implementing and integrating it, and testing the system. Identifying problems and requirements was conducted through an online questionnaire and related works study. The graphics tool used was 3D Studio Max. Unity3d was used to develop the system with the software library from Qualcomm?s Vuforia for the AR implementation. The results show the mobile application called ARsembly. It serves as the early stage of concept model as it only assists the simple assembly. Through system testing performed by both researchers and end-users, ARsembly is proven to be useful and helpful in learning and performing furniture assembly.
Dampak Implementasi Change Management pada Organisasi Sugandi, Lianna
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.v4i1.2743

Abstract

Changes have survival benefits for an organization. without any change, it can be ascertained that the age of the organization will not last long. Changes intend to make the organization not a static but remained dynamic in the face of changing times. A leader should have a vision and a change in the strategy based on assumptions about future conditions that are expected to occur. Only a leader who owns the personality, behavior, and the sense of power that is able to deal with change. 
Kajian Perolehan Sertifikasi Profesi Internasional Bagi Lulusan Jurusan Sistem Informasi Hudiarto, Hudiarto
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.v2i2.2939

Abstract

Having a professional certificate in information systems and information technology fields means having the recognition for related skills and knowledge requested by the industry. Some countries and institutions have tried to bridge these needs by organizing conferences and seminars. Information systems department of Bina Nusantara University always tries to meet those needs. One effort is to introduce the Enterprise Architecture method initiated by Bernard for use in the course of information systems and information technology strategic planning. The results of this activity suggest that obtaining international certification requires the implementation of learning in a referenced standard. This approach is expected to accelerate the acquisition of professional certification for graduates majoring in information systems and technology. 
Penggunaan Virtual Machine dalam Pembelajaran Jaringan Budijono, Santoso; Saleh, Robby
ComTech: Computer, Mathematics and Engineering Applications Vol 5, No 1 (2014): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v5i1.2643

Abstract

Computer Networks is an important course as a basis in computer science. This is because at this time all activities are associated with the use of network system or communication system. In the course of learning in Computer Networks, students are often difficult to understand network concepts, especially with many layman terms for students. The term IP, Subnet Mask, Gateway, and Router are the terms widely used in network. To better understand the use of the IP, Subnet Mask, Gateway, and Router, it should be given concrete examples of the application day-to-day. Such as setting the IP, Subnet, Gateway, and Router on a PC connected to the network, it is hoped that students can quickly understand. This prototype used some Virtual Machines considered to represent the need for the creation of multiple virtual machines in one computer. The resulting prototype is expected to be useful in learning the Networking matter in Computer Networks subject. Research successfully created 2 Virtual Machines in 1 computer, with the network in both Virtual Machines isolated and not connected to the Internet.

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