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ComTech: Computer, Mathematics and Engineering Applications
ISSN : 20871244     EISSN : 2476907X     DOI : -
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
Aplikasi Pembelajaran Algoritma Dasar Interaktif Berbasiskan Computer Assisted Instruction Budi Yulianto; Eileen Heriyanni; Radinal Eliset Sembiring; Rininta Amalia; Rudy Fridian
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.v4i2.2611

Abstract

Book as a learning method is less effective and interactive since it can not deliver motion animation. Thus, a more interactive learning method is needed to have a better learning process. The goal of the research is developing an application that provides easiness for students in learning algorithm by combining computerassited instruction (CAI) and internet technology. On the development phase, the research methodo uses fact finding by a survey to students who are or have been learning algorithm and a literature study, and also waterfall method for software development. The research output is a CAI application for learning algorithminteractively. The developed application is interactive for learning process and able to help students in deepen algorithm topics.
BFC Method For Prediction of Transient Head on Seepage Path Sherly Hartono
ComTech: Computer, Mathematics and Engineering Applications Vol. 1 No. 2 (2010): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v1i2.2612

Abstract

Seepage causes weakening of levees and can cause levee failure or overtopping due to levee settlement. A numerical method, called the boundary fitted coordinate (BFC) method, was developed to determine seepage through a levee and the transient head on the seepage path due to the changing water level during a flood. The BFC transforms the physical coordinate system into a computational curvilinear coordinate system. The grid generated in this method accurately represents the boundary of the system regardless of its complexity. 
Analisis dan Perancangan Website Pembelajaran Bahasa Secara Mandiri di Self Access Language Learning Center Bina Nusantara Hady Pranoto
ComTech: Computer, Mathematics and Engineering Applications Vol. 1 No. 2 (2010): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v1i2.2613

Abstract

The purpose of this research is to build an independent language learning applications using Internet technologies to facilitate the user in learning the language. The research method used is by analyzing the ongoing learning process; analyze the constraints and limitations of existing facilities and designing new processes to address existing constraints and limitations. In designing a language self learning website authors examine the existing through observation, interviews and questionnaires to the stakeholders who use the system. Observations also observed duration of the user in conducting learning activities, and provided space to accommodate the transaction. After analysis of the current system, author designing the new system using object-oriented design methods and using analysis tools UML. After completed the system design done system built using ASP.NET programming language. The Conclusions is an independent language learning applications using Internet technology giving easy way to facilitate the learning process in terms of accesing time and place, and the application also provide facilities for teacher to monitoring student self learning. 
Pengaruh Penerapan Coi Framework pada Pembelajaran Online Terhadap Peningkatan Pemahaman (Subkategori Cognitive Presence) Mahasiswa Lydiawati Kosasih Asalla; Naova Maria; Rainer Hannesto
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.v5i1.2614

Abstract

This study aims to discuss some of considerations in education to achieve good quality in learning instruction. The indicator is student’s comprehension increasing through the use of technological advances such as electronic learning (E-Learning) on social media and using Community of Inquiry (CoI) model as a comparative study to improve the quality of E-Learning program. The data used in this study were obtained through survey to intended students and literature study. Final conclusion of this study is a proposal to teachers on an interactive learning and rich of knowledge that will improve the learner’s comprehension.
Pengembangan Sistem Informasi Akuntansi untuk Proses Produksi pada PT. Xyz Yohannes Kurniawan; Devyano Luhukay; Titan Halim
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.v5i1.2615

Abstract

The purpose of the research is to identify and analyze the need of accounting information system for processes, procedures, and documents related to the production process at PT XYZ, which design the useful of accounting information systems to support business processes that occur. The design method used in this research is a method of Object Oriented Analysis and Design (OOAD) with the UML notation, including: use case diagram, class diagram, and component architecture. Analyzes performed related to the organizational structure and business processes based on the theory of accounting information systems production processes and internal control theory. The result achieved by analysis and design of accounting information systems production process is a desktop based application that can assist in the activities of the production process, especially in the documentation and storage of transaction data, and produce reports in accordance with company requirements. Conclusions derived from the analysis and design is the implementation of a desktop based application that can help PT XYZ to improve systems and procedures, so it can obtain the required information on time and accurately.
A Strategic Analysis of Allegro: A Custom Made Supply Chain Management Software Zulfany Erlisa Rasjid
ComTech: Computer, Mathematics and Engineering Applications Vol. 1 No. 2 (2010): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v1i2.2616

Abstract

Allegro is a Supply Chain Management software which is used by one of the Buying Agent that has branches all over the world. Allegro is a tailor-made application specially build for the Buying Agent. Allegro thas a lot of capability, however it is not being used optimally. This paper analyszes the software such that it can be used optimally to support the company (Buying Agent) strategically and help the company to perform better by using Balance Score Card and KPI generated by the use of the system. The KPI is derived from the Business Objectives and the data in fact are all available in Allegro which is currently not used. As a conclusion, the writer suggested using all features available from Allegro and hence it will prove the overall performance of the company. 
Studi Kasus Implementasi Service Oriented Architecture (SOA) di Credit Suisse Sartika Kurniali
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.v4i2.2617

Abstract

Credit Suisse Group (CSG) is a leading company engaged in global financial services. At the end of 90s IT infrastructure complexity of Credit Suisse has reached a critical situation. The existing IT infrastructure is no longer able to support the required business functionality. This leads to the introduction of an integrated architecture based on Service-Oriented Architecture (SOA). The purpose of this study is to learn how Credit Suisse successfully implements SOA both on a technical and organizational level. Analyses were performed by processing factual and reference data acquired. From the research, the successful implementation is due to clarity of interface, clarity of process, management commitment, and solid technology. Their success does not come easily since they also face obstacles and conflicts on the implementation.
Perancangan Enkripsi Pada Citra Bitmap Dengan Algoritma Des, Triple Des, dan Idea Agustinna Yosanny
ComTech: Computer, Mathematics and Engineering Applications Vol. 1 No. 2 (2010): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v1i2.2618

Abstract

Rapid development of Information Technology causes information can access easier without space boundaries. Image is a form of information, which contains many information. Some image contains confidential information that cannot distribute to unauthorized persons. Therefore, image encryption application is create to encrypt part of image that has confidential information. The image encryption application is encrypt image by applying DES, Triple DES, and IDEA algorithms. The research was applying analysis and design methodology. The analysis methodology was undertaken through literature study and algorithm research and testing. The design methodology was undertaken through database, features, system, and screen layout design. Results of the research are image encryption application that can encrypt part of image and or all of image by applying three algorithms such as DES, Triple DES, and IDEA. This application is show comparation of these algorithms. In conclusion, method of encryption can apply to image, so that confidential information of the image can protect from unauthorized person. 
Analisis Korelasi Faktor Perilaku Konsumen terhadap Keputusan Penggunaan Teknologi Komunikasi Voip Budi Yulianto
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.v5i1.2619

Abstract

The advancement of communication technology that is combined with computer and the Internet brings Internet Telephony or VoIP (Voice over Internet Protocol). Through VoIP technology, the cost of telecommunications in particular for international direct dialing (IDD) can be reduced. This research analyzes the growth rate of VoIP users, the correlation of the consumer behavior towards using VoIP, and cost comparisons of using telecommunication services between VoIP and other operators. This research is using descriptive analysis method to describe researched object through sampling data collection for hypothesis testing. This research will lead to the conclusion that the use of VoIP for international area will be more advantageous than the use of other operators of GSM (Global System for Mobile), CDMA (Code Division Multiple Access), or the PSTN (Public Switched Telephone Network).
Optimisasi Economic Dispatch dengan Transmission Loss Menggunakan Metode Extended Lagrange Multiplier dan Gaussian Particle Swarm Optimization (Gpso) Siti Komsiyah
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.v5i1.2620

Abstract

In the operating process of electrical energy, economic planning is the main goal to be achieved. The goal of economic dispatch problem is determining the combination of optimal power distribution to a number of operating generator units so that the electricity demand in a certain area is fulfilled without ignoring the constraints that exist, so it is obtained a minimum total generation cost. Optimization method that is used is the Gaussian Particle Swarm Optimization (GPSO), while for the validation of the results, the obtained solution with the GPSO will be compared with the solution obtained by mathematical methods Extended Lagrange Multiplier (ELM) or the Lagrange multiplier method which its functions are expanded. The solution that is calculated is generation output in Megawatt of 23 thermal generating units system in Mahakam, East Kalimantan, which had a total cost of optimal generating (minimum).

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