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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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Analisis dan Perancangan Data Warehouse untuk Penjualan, Identifikasi Status Distributor, dan Perpanjangan Masa Aktif Distributor pada PT Harmoni Dinamik Indonesia Prajena, Gredion
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.v4i1.2792

Abstract

The purpose of this study is to analyze sales data from warehouse to distributors, identification of distributor status, and extension periods of active distributors. From the analysis, a data warehouse application is created with user interfaces that are easy to understand so as it can facilitate executive decision making. The analysis is done through the following steps: survey of the running system, analysis of the data obtained from the survey, identification of the information needed for data warehouse creation and identification requirements of the system to be built. Meanwhile, designing a data warehouse uses the Nine-Step Methodology of Ralph Kimball. The result is a data warehouse containing relevant and required information for executives to make decisions. The data warehouse application displays information to the user interface that is easy to understand and quick in making the report. The data needed by the company have been analyzed and produce useful information for executives. In addition, the reports can be generated quickly and the results of the analysis shown in the form of charts and pivot facilitate decision making more rapidly and precisely.
Local Contrast Enhancement Using Intuitionistic Fuzzy Sets Optimized By Artificial Bee Colony Algorithm Wonohadidjojo, Daniel M.
ComTech: Computer, Mathematics and Engineering Applications Vol 8, No 1 (2017): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v8i1.3777

Abstract

The article presented the enhancement method of cells images. The first method used in the local contrast enhancement was Intuitionistic Fuzzy Sets (IFS). The proposed method is the IFS optimized by Artificial Bee Colony (ABC) algorithm. The ABC was used to optimize the membership function parameter of IFS. To measure the image quality, Image Enhancement Metric (IEM)was applied. The results of local contrast enhancement using both methods were compared with the results using histogram equalization method. The tests were conducted using two MDCK cell images. The results of local contrast enhancement using both methods were evaluated by observing the enhanced images and IEM values. The results show that the methods outperform the histogram equalization method. Furthermore, the method using IFSABC is better than the IFS method.
Tingkat Kelelahan Pengemudi Bus Rapid Transport (BRT) Jakarta Berdasarkan Swedish Occupational Fatigue Index (SOFI) Zuraida, Rida
ComTech: Computer, Mathematics and Engineering Applications Vol 6, No 2 (2015): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v6i2.2267

Abstract

Fatigue is a common situation experienced by everyone, but until now a simple measuring tools universally accepted is not exist. Fatigue measurement instrument most widely used is an instrument-based questionnaire. This study used the Swedish Occupational Fatigue Index (SOFI) as one of the instrument to measure BRT driver’s fatigue. The aim is to evaluate physical mental, and shift work fatigue and provide an overview of fatigue levels experienced by the driver BRT on two different shifts. Hopefully it can be used for driver fatigue management by a company. The study was conducted for two different shifts (morning and afternoon), with a total participants are 30 drivers. Results showed that motivation level of shift 2-driver is lower after they finish their work compared to shift1-driver. In shift 1, generally available time to rest,socializing and hanging out with family is longer than available time for shift 2-driver. Perception of loss of energy after work is also higher in shift 2 compared to shift 1, especially the perception of feeling exhausted. Similar results were obtained in the physical aspect and the physical exertion and physical discomfort. Therefore we can conclude the work shift has affected fatigue level experienced by the driver's BRT, and shift rotation is suggested to help the driver to recuperate.
Penentuan Daya Cerna Protein In Vitro Ikan Bawal (Colossoma Macropomum) pada Umur Panen Berbeda Saputra, Dede
ComTech: Computer, Mathematics and Engineering Applications Vol 5, No 2 (2014): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v5i2.2430

Abstract

Digestibility is part of the sample consumed and not released into the feces. This study discusses about the protein digestibility of tambaqui fish (Colossoma macropomum) at different ages and sizes in vitro. Protein digestibility is the ability of the organisms to break down proteins into simple molecular compounds. At the initial stage, all samples used were dried, then distilled water at pH 8 added, and later the mixture was homogenized for three minutes. After the mixture was homogeneous, enzymes and distilled water were added. Samples were then centrifuged and the absorbance of the sample was measured using absorption spectrophotometry. The results obtained during the observations showed that the digestibility of proteins in the casein showed a value of 100%, small pomfret fish for 28.37%, pomfret fish at 58.42%, and large pomfret fish amount to 88.39%. This shows the larger size of the fish, then the digestibility of protein will be higher. In addition, the lower the pH, the protein digestibility will be higher for hydrolysis of proteins requires an acidic environment of pH conditions.
Implementasi Rfid pada Perusahaan Penyewaan Mobil Karmawan, I Gusti Made
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.v4i1.2687

Abstract

Radio Frequency Identification (RFID) is an identification technology based on radio waves. At this time, we will describe the application of RFID technology in a rental car company. The study discusses about information about how to implement RFID within the enterprise, the role of RFID in the enterprise, how to use RFID, and everything else related to RFID in the enterprise. The  main purpose of writing this paper  is to make easy for reader finding information about general description of RFID and its application to a  car rental company. Furthermore,  methodology components are type and source of Data, data collection technique, hypotheses and data analysis technique. Finally, a conclusion is made that that RFID is an identification technology that is relatively new and feasible at the car rental company which is an alternative to barcodes that have been widely used. The presence of RFID also provides a very beneficial effect to the company, as has been displayed through charts of various aspects of the company in the results section.
Analisis dan Perancangan Sistem Interactive Voice Response (IVR) Berbasis Openvxi Menggunakan Asterisk Pada Hotel Sahid Jaya Kerta, Johan Muliadi; Jufri, Wike Apryanto; Nugroho, Alexander Aryo; Kurniawan, Andreas
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.v1i2.2573

Abstract

The purpose of this study is to provide a deep understanding of technology of IVR (Interactive Voice Recognition) in OpenVXI based network using Asterisk, that help Sahid Jaya hotel to streamline communication with the guests, improving service and employee effectiveness. The methodology used is analysis which is through surveys, observation and interviews with the company and the design method by designing system from the existing needs analysis. The results obtained from this research is Communication System based in IVR OpenVXI can be applied to existing VoIP network, without disrupting the existing network. Some existing services can be supported with this system usage. Conclusions can be drawn is the use of IVR in the network using VoIP technology is the best solution to overcome the problems and needs of the hospitality which one of these is limited information guest cna get that can provided by non-operators and for support service improvement. 
Prototipe Sistem Keamanan dan Kenyamanan Gedung Olahraga Berbasiskan Mikrokontroller Liawatimena, Suryadiputra
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.v1i1.2164

Abstract

This study is intended as a source of learning and research will design and comfort safety System gymnasium-based microcontrollers. Existing gym until now still has a weakness for several factors such as weather changes rapidly, visitors are crowded, and the level of public awareness of the order is still lacking, so will implications for the safety and comfort for users of building itself. The method is a method of research literature and methods of laboratory studies. Literature study was done by studying and looking for articles on matters relating to the development of world sports stadiums that are considered to have the required criteria. For laboratory study done by making the design of hardware and software is also used in this study. This system used sensors to detect the rainy weather conditions, detect the light intensity to keep the lighting inside the building, limiting the number of visitors in accordance with the capacity building capacity, temperature rise resulting from a user density of buildings and also a fire hazard that could have been either intentional or unintentional. Entirety of the sensor arrangement is controlled by a microcontroller. It is expected that by using this system, users are building (football stadium) will feel more secure and convenient to activities inside the building.
Sistem Pelayanan Jasa dan Penjualan Produk Percetakan Berbasis Web pada Proposter Indonesia Elidjen, Elidjen; Cahyadi, Gandi; Andika, Mario
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.v2i2.2824

Abstract

Various constraints related to the availability of up-to-date information services and product sales happen to ProPoster Indonesia, a business of digital printing and display services system run since 2002. ProPoster Indonesia needs to offer an easy access to services and online service sales of printing products to its customers and plans to expand its business services throughout Indonesia. These conditions initiate the development of web-based service and products sales system for ProPoster Indonesia. The main objectives are to overcome the difficulties in obtaining the latest information related to services and products and facilitate promotional printing services to all parts of Indonesia. The sequential linear process model is used to develop the overall system while literature study is done to enrich the insight to develop a better system. The user friendly system makes easy for customers to get the latest information that ultimately facilitate the service process and product sales. 
Analysis of Wollongong City Council using 7s’s of Galliers and Sutherland Methods 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.v8i4.4022

Abstract

The research analyzed website of Wollongong City Council (WCC) and all the plans done by the WCC. It also showed details an Information Systems (IS) strategic plan for WCC. Although the WCC already had an integrated system, there were several key issues. The framework used to devise IS plan was seven stages (7S) of Gallier and Sutherland (G&S). The approach assisted WCC in locating the current stage of its Information Technology (IT) maturity. From the analysis undertaken, it finds that IT currently is within stages 4 and stage 5 in seven stages. The final result will be the framework of the design as recommendations to the WCC.
Pembuatan Sistem Informasi dengan Analisis dan Perancangan Berorientasi Objek Pelawi, Dewan
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.v4i1.2711

Abstract

To generate an information system which is in accordance with the needs of company requires an analysis of business processes by observing the running system. Solutions for problems found when doing the business are observed using the systems approach. Object-oriented analysis and design is a method currently used to build an information system. The system development with "Object Oriented Analysis & Design (OOAD)" method stated by Satzinger includes making activity diagram, event table, class diagram, usecase diagrams, usecase description, state chart diagram, deployment and software architecture, first-cut design class diagram, simple sequence diagram (SSD), the sequence diagram (first-cut, view layer, data access layer), communication diagram, updated design class diagram, package diagram, persistent object, user interface. The result obtained after performing all phases is an information system that fits the company needs which is expected to improve the performance and effectiveness in business processes and also support the company's business goals.

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