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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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Pengukuran Jarak Berbasiskan Stereo Vision Kartowisastro, Iman Herwidiana
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.v1i2.2559

Abstract

Measuring distance from an object can be conducted in a variety of ways, including by making use of distance measuring sensors such as ultrasonic sensors, or using the approach based vision system. This last mode has advantages in terms of flexibility, namely a monitored object has relatively no restrictions characteristic of the materials used at the same time it also has its own difficulties associated with object orientation and state of the room where the object is located. To overcome this problem, so this study examines the possibility of using stereo vision to measure the distance to an object. The system was developed starting from image extraction, information extraction characteristics of the objects contained in the image and visual distance measurement process with 2 separate cameras placed in a distance of 70 cm. The measurement object can be in the range of 50 cm - 130 cm with a percentage error of 5:53%. Lighting conditions (homogeneity and intensity) has a great influence on the accuracy of the measurement results. 
Aplikasi Virtual Gallery Berbasiskan Content Management System pada Jurusan Sistem Informasi Universitas Bina Nusantara Georgiana, Vina
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.v2i1.2804

Abstract

A study program which represents a college will always attempt to link its activities with the needs of society and industry as for its graduates to be recognized outside. Various activities such as internships, industry reviews, theses, and others the need to show the results individually and be exposed widely, so that it becomes part of student testimonials at work. Displaying and publishing the work of academic community can be done with the support of information technology through a web-based application, called virtual gallery application, based on a content-management-system. The research object is limited on work of student activities on a study program. The base to manage and publish the work of academic community uses: (1) object-oriented method (2) web-based application development. Theevaluation results make easy the management of the academic community?s work, increase the competitive advantage of the graduates, and be able to improve the quality of a study program at a college. 
Usulan Tata Letak Ulang Menggunakan Software Quantitative Systems untuk Meminimalkan Jarak Perpindahan Bahan di Lantai Produksi Departemen Mechanic PT Jefta Prakarsa Pratama Nugroho, Khristian Edi; Rahmawan, Dimas; Utomo, Prayogo Adi
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.v3i1.2453

Abstract

The layout applied on the production floor of the Department of Mechanic of PT. Jefta Prakarsa Pratama is not considered as an optimal layout. The reason triggered this optimal level, are some backtrack movements that reduce the effectiveness and efficiency of material handling activities. This research refers to two types of calculation methods. First, manual calculation, which is rectilinear distance measure. Second, computerized calculation, which is Quantitative Systems (QS) software. There are three critical criterias referenced in this research, i.e. straight flow of material, more minimal backtrack movement, and more minimal material moving distance. The iteration results using QS software are translated into block layout and then are made as a proposed layout. The rectilinear calculations performed manually are intended to calculate the total of material moving distance. The data processing obtained a re-layout solution which is more optimal for the production floor of the Department of Mechanic, because it could reduce backtrack distance by 75.28% and the material moving distance by 30.03%. The implementation of the proposed layout is expected to reduce the time of material moving activity on the production floor of the Department of Mechanic, so that the material moving process could run more effectively and efficiently.
Model System Dynamics Infrastruktur BTS Ramah Lingkungan Daerah Rural untuk Optimalisasi Perhitungan ARPU Sardjono, Wahyu
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.v4i1.2699

Abstract

Green Base transceiver station (BTS) or known as remote BTS is a special BTS with IP technology-based that has a small capacity and takes low power consumption with standard features suitable for use in rural areas. BTS utilizes 100% solar energy as a source of energy. The infrastructure Green BTS is composed of high-tech devices which is able to save energy, environmentally friendly, small and lightweight. The high rate service calls and SMS on green BTS is caused by the absence of competition telecom operators at a site. The solution to this  problem needs to be done with system dynamics modeling approach with the aim to establish causality (cause and effect) between the variables. The standard target of model pattern which has been changed on system dynamics can be used to demonstrate the behavior of the model between the number of subscribers, the availability of network capacity and ARPU (average revenue per user) on the Green BTS site. On the changed standard target model, the actual revenue is placed as the actual event, the target revenue is as a target; the difference between the actual and target revenue is as gap, gap changes are as the pressure on the target and the corrective action taken against revenue as a corrective action. Based on simulation results, the standard model change targets can be developed by adding two negative loops (balancing loop) as an alternative solution towards the achievement of revenue targets that have been set.
Aplikasi E-Tour Guide dengan Fitur Pengenalan Image Menggunakan Metode Haar Classifier Suhartono, Derwin; Permana, William Surya; Wiguna, Antoni; Putra, Ferlan Gisman
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.v4i2.2593

Abstract

Smartphone has became an important instrument in modern society as it is used for entertainment and information searching except for communication. Concerning to this condition, it is needed to develop an application in order to improve smart phone functionality. The objective of this research is to create an application named E-Tour Guide as a tool for helping to plan and manage tourism activity equipped with image recognition feature. Image recognition method used is the Haar Classifier method. The feature is used to recognize historical objects. From the testing result done to 20 images sample, 85% accuracy is achieved for the image recognition feature.
Analisis Customer Value pada Perancangan Aplikasi E-Procurement di PT Indesso Aroma Ongowarsito, Henkie
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.v2i2.2837

Abstract

More online business applications are utilized by companies; one of which is e-procurement. PT Indesso Aroma as a manufacturing company of essential oils, natural extracts, and aromatic chemicals products needs to improve its conventional procurement process to e-procurement to be more effective and efficient. For that, a research is conducted towards the performance and interest of the company's procurement system. Furthermore, the current SAP system application support is developed, as the customer values are analyzed using gap analysis to see the benefits of its application for the company. The e-procurement design uses OOAD method with UML diagram notation including analysis of problem domain, application domain, architectural design and component design. Cost-benefit analysis is performed to see an increase in customer value from the e-procurement application based on measurements of NPV, IRR and ROI of investing in the e-procurement design. Thus an e-procurement application is created that is expected to improve the company?s procurement process with several key features such as Purchase requisition, Purchase Order, Purchase Return, Supplier Catalog and Supplier Quotation. 
Visualisasi 3 Dimensi Tumbuhan Langka di Pusat Konservasi Tumbuhan Kebun Raya Bogor Rubil, Rubil; Arini, Arini; Syam, Ardiyan Saputra
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.v4i2.2492

Abstract

Plants are an important part of the cycle of life, but often overlooked by human existence. Lots of plants are on the verge of extinction so it is difficult to see their figures. Many efforts have been done by agencies to preserve the rare plant. With the 3-dimensional visualization that replaces the figures of the ungrowing plants, the authors intend to make a 3D prototype application of rare plant encyclopedia. The goal is to simplify the users, especially visitors of Plant Conservation Center Library to see 3-dimensional model of rare plants. Theapplication is created through several stages of research, including field observations and interviews, library research, and related researches. Vaughan multimedia development is implemented for system development which has 4 stages. First is planning by searching target audiences, and making design concept of and navigation concept. Next is design and production phase using 5 activities such as storyboard, flowchart, interface design, content search and production. Alpha and Beta testing is used as the testing phase. The last isthe multiplication and distribution phase of application deployment. This application can allow users to search for information about the world of plants. For further development of the process, the application is expected torun in a web-based media to be accessible by public.
Rancangan Sistem Informasi Online Booking pada Salon ”Cantik” Georgiana, Vina
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.v2i1.2735

Abstract

A management can utilize information technology to produce effective and efficient business process that eventually will increase customer satisfaction. The purpose of this study is to analyze and design the needs of online booking information system of Cantik Salon. In conducting the analysis and system design, object-oriented method is applied using Mathiassen approach. 
Penggunaan Metode Respondent Driven Sampling (Rds) dalam Survey Pemasaran Beras di Provinsi Kepulauan Riau Pudjihastuti, Herena
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.v5i1.2625

Abstract

As a Free Trade Zone (FTZ), the province of Riau Islands has a different pattern of strategic commodity (such as rice) marketing comparing to other regions in Indonesia. To anticipate and control the negative effects of the implementation of FTZ policy, It is necessary to study about rice marketing trade system in the Riau Islands region. The study was conducted to identify patterns of supply and marketing of food (rice) and analyze the marketing margin and marketing efficiency as well as the factors that influence it. The study was conducted through desk study and field surveys. Secondary data was collected from various sources and primary data collected through interviews with selected respondents using Respondent Driven Sampling method (RDS). The study shows that the structure of the rice market in Riau Islands can be categorized as monopolistic. Most of the rice supply comes from outside the region and import, the supply chain is quite simple, the price is relatively stable and relatively efficient marketing and resilience of rice reserves are relatively high for merchants. Nevertheless, the Riau islands will be very susceptible to interference distribution. Required efforts of the provincial government of Riau Islands to provide sufficient rice reserves. This paper gives an example of the use of the RDS method in marketing surveys.
Aplikasi E-Notetaking Berbasiskan Multimedia untuk Kegiatan Pencatatan Yulianto, Budi; Pramita, Arizka; N., M. Fadly F.; N., Meidyta H.
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.v2i2.2934

Abstract

This article presents analysis and design of multimedia based e-notetaking application. The goals of the research are to optimize audio-visual usage in taking note, to organize notes to be tidied and categorized, and to make easy copying and sharing notes to other users. Output of the research is an e-notetaking application implemented on laptops. The designed e-notetaking application has features for users in taking notes by using notebook or netbook as easily as taking notes by using book.

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