ComTech: Computer, Mathematics and Engineering Applications
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.
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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
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DOI: 10.21512/comtech.v5i1.2614
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
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DOI: 10.21512/comtech.v5i1.2615
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.
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
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DOI: 10.21512/comtech.v5i1.2619
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
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DOI: 10.21512/comtech.v5i1.2620
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).
Perbandingan Metode Konstruksi Dinding Bata Merah dengan Dinding Bata Ringan
Michael Tedja;
Charleshan Charleshan;
Jefri Efendi
ComTech: Computer, Mathematics and Engineering Applications Vol. 5 No. 1 (2014): ComTech
Publisher : Bina Nusantara University
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DOI: 10.21512/comtech.v5i1.2621
The development of technology and the demands on the speed of the construction project cause the material manufacturers compete to create a new material that can accelerate the process to build a building. Wall is one of the non-structural elements on a building. Both low-rise building and high-rise building are no doubts using this material. Wall works can use two different types of material, such as brick wall made of red clay and light brick wall made of cement, silica sand, and limestone. In the construction process wall is needed in a large amount of area, so the difference of the price should be examined in choosing the type of the material to gain efficient cost. The purpose of this study is to determine which method of wall construction is more efficient in terms of cost and time, the use of red brick wall or brick wall light. The study was conducted using survey, comparative, literature study method. Results indicate that both methods have advantages and disadvantages. Red brick wall method is cheaper in the cost of the process, while the lighter brick wall method much faster in the process.
Peranan Sistem Erp dan Perubahan Pola Kerja sebagai Upaya Meningkatkan Kinerja Perusahaan
Hendra Alianto;
Santo F Wijaya
ComTech: Computer, Mathematics and Engineering Applications Vol. 5 No. 1 (2014): ComTech
Publisher : Bina Nusantara University
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DOI: 10.21512/comtech.v5i1.2622
The ERP system is an integrated system that supports the core business activities of a company. These activities include manufacturing, logistics, finance and accounting, sales and marketing, and human resources. The ERP system will help related departments in a company to share data and information, cost reduction, and improved management of business processes, which will have an impact on work activities become more efficient and more effective. The method in this research is a case study approach, analysis, evaluation of documents and data collection. This study aims to discuss how the role of the ERP system and changes in work patterns as an effort to improve the performance of companies backed by the role of the ERP system.
Arsitektur Rumah Tinggal Jepang untuk Masyarakat Umum
Nina Nurdiani
ComTech: Computer, Mathematics and Engineering Applications Vol. 5 No. 1 (2014): ComTech
Publisher : Bina Nusantara University
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DOI: 10.21512/comtech.v5i1.2624
The form of Japanese residential architecture throughout its history shows its own uniqueness. The success of the Japanese government to provide housing for its citizens supports the study to know how Japanese residential architecture for the public society happened until today. The study of Japanese residential architecture for the public society was conducted by the descriptive approach. Data were collected through literature study from the history and development of Japanese residential architecture for public society and also done by field observations in Tokyo and surrounding cities. The study results the knowledge about many forms of residential architecture to public society since before the world war until now and provides knowledge relating to the successful provision of public housing so that it can be accepted by the occupants. The study is expected to provide inputs for the development of programs for public housing provision in urban areas in Indonesia.
Penggunaan Metode Respondent Driven Sampling (Rds) dalam Survey Pemasaran Beras di Provinsi Kepulauan Riau
Herena Pudjihastuti
ComTech: Computer, Mathematics and Engineering Applications Vol. 5 No. 1 (2014): ComTech
Publisher : Bina Nusantara University
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DOI: 10.21512/comtech.v5i1.2625
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.
Perancangan Sistem Informasi Rekonsiliasi Transaksi (Bank Xyz)
Ikrar Adinata Arin;
J. Rolles Herwin Sihombing
ComTech: Computer, Mathematics and Engineering Applications Vol. 5 No. 1 (2014): ComTech
Publisher : Bina Nusantara University
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DOI: 10.21512/comtech.v5i1.2627
Banking world wants to help companies accelerate transaction receipts and disbursements, of the money they save in the bank. Bank account is a means to save money and transact safely and practically. If there is a large payment to the supplier, the company does not need to carry a lot of cash to the suppliers place, simply by giving a check to the supplier, and vice versa. E-Reconciliation is a service from XYZ Bank in the form of a delivery payment transaction data to the customer server periodically. Data delivery, safe and secure, to customers is an important factor in the process of reconciliation, one safe and secure way is to send the reconciliation report via encrypted email facility. With the delivery of the payment transaction data, customers can automatically reconcile the data. E-Reconciliation including new services in banking and is expected to add value to XYZ Bank among other competitors. In addition, it is expected to be many dealers and sub-dealer/reseller of customers who are interested in using E-Reconciliation services, so as to improve the balance of CASA.
Analisis Alat Bantu Tuning Fisikal Basis Data pada Sql Server 2008
Marlene Martani;
Hanny Juwitasary;
Arya Nata Gani Putra
ComTech: Computer, Mathematics and Engineering Applications Vol. 5 No. 1 (2014): ComTech
Publisher : Bina Nusantara University
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DOI: 10.21512/comtech.v5i1.2628
Nowadays every company has been faced with a business competition that requires the company to survive and be superior to its competitors. One strategy used by many companies is to use information technology to run their business processes. The use of information technology would require a storage which commonly referred to as a database to store and process data into useful information for the company. However, it was found that the greater the amount of data in the database, then the speed of the resulting process will decrease because the time needed to access the data will be much longer. The long process of data can cause a decrease in the company’s performance and the length of time needed to make decisions so that this can be a challenge to achieve the company’s competitive advantage. In this study performed an analysis of technique to improve the performance of the database system used by the company to perform tuning on SQL Server 2008 database physically. The purpose of this study is to improve the performance of the database used by speeding up the time it takes when doing query processing. The research methodology used was the method of analysis such as literature studies, analysis of the process and the workings of tuning tools that already exist in SQL Server 2008, and evaluation of applications that have been created, and also tuning methods that include query optimization and create index. The results obtained from this study is an evaluation of the physical application tuning tools that can integrate database functionality of other tuning tools such as SQL Profiler and Database Tuning Advisor.