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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 Modulus Elastisitas Dinamis Batuan dengan Metode Seismik Refraksi Salim, Ashadi
ComTech: Computer, Mathematics and Engineering Applications Vol 3, No 2 (2012): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v3i2.2331

Abstract

The seismic wave velocity in rock formation depends on the elastic modulus and mass density of rock where the wave travels. The velocity measurement of P and S waves on rock formation and the mass density in the laboratory can be used for calculating the elastic modulus of rock formation. The elastic modulus is part of rock mechanical parameter needed in geological engineering researches. The velocity measurement of P and S waves by the seismic refraction method was done on a tunnel with 11 spreads of measurement. From the results of the measurement, three groups of rock formation could be identified. The first is rock formation with Ed=8.890-12.68 MPa and G=3.306-4.830MPa; the second group is rock formation with Ed=8.890-12.68 MPa and G=3.306-4.830MPa; and the third group is with Ed=18.520-21.120MPa and G=6.724-7.744MP. The first group is clay formation while the second and third groups are andesitic stone formation. 
Pengkajian Aplikasi 3D untuk Permodelan Bangunan Bersejarah Wijaksono, Sigit; Suryawinata, Bonny A.; Djimantoro, Michael Isnaeni
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.v4i2.2507

Abstract

Various history books as media to learn the history of Indonesia people are actually quite complete and adequate. However, the interest of younger generation, especially the children, to read the books is quite low. Additionally, the advance of computer technology makes kids and students more interested playing game than reading books. The game trend backgrounds the need for research on the use of computer game application as a medium to learn the history of the building through a game. As the special purpose of this research is to obtain a game application that can be a medium of learning historical buildings. The research is divided into two stages: the first stage is to identify gaming software that can be used as an educational game for historical buildings and to develop the model of 3D gaming applications; the second phase is the application trial and implementation at schools.
Reporting Services Sebagai Sistem Alternatif dalam Pembuatan Laporan Heripracoyo, Sulistyo
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.v2i1.2752

Abstract

Generally in an administrative system there are also report features for beside data entry features. One of the benefits from this report is that users do not need to know where the data is obtained by the database either directly from online transaction processing (OLTP) or historical data. Nevertheless, the report features are designed by the developer in accordance with user needs. Commonly, the application developers use additional softwares integrated to the application. This study describes an alternative report system called Reporting Services which is a software from Microsoft that can be found from SQL 2000 to the latest version. With Reporting Services creating reports can be more easy and interactive to the users, and the results can be direct accessed via the web. 
Designing Note Sharing Application on Android Platform Jenie, Renan Prasta; Hutomo, Karyana; Wijaya, Freddy
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.v2i2.2937

Abstract

Writing notes on paper is fun because we can simply write whatever we want on it. Writing notes in the digital media is also advantageous for it can be shared directly. If we can combine the two functions, it will be more profitable. Therefore, the author wants to combine the benefits of writing as you wish like as on paper with contemporary digital writing. Somehow, writing using PC cannot be done at any time due to the needs of both electrical connection and space availabilty. Therefore, Smartphone or tablet is the right choice because it is not tied to two needs. The Smartphone to be selected is the one built with android platform for ease of note transfer compared to other platforms. 
Model Integrasi Penjadwalan Batch dan Penjadwalan Preventive Maintenance dengan Kriteria Minimisasi Biaya Simpan, Biaya Setup, Biaya Pm, serta Biaya Rework pada Mesin Stabil Zahedi, Zahedi
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.v5i1.2634

Abstract

This study developed a model of batch scheduling involving the unavailability machine to minimize setup costs, cost of preventive maintenance and the cost of rework in a stable machine. This model is considered necessary in order to understand the effect of the unavailability machine for production runs and to understand the effect on the batch production schedule. The results of this study indicate that the first and last run will not give single batch. Given a hypothetical example of how the model and algorithm developed solve the problem instance. 
Analysis And Database Design from Import And Export Reporting in Company in Indonesia Zulkarnain, Novan
ComTech: Computer, Mathematics and Engineering Applications Vol 7, No 1 (2016): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v7i1.2228

Abstract

Director General of Customs and Excise (DJBC) is a government agency that oversees exports and imports in Indonesia. Companies that receive exemption and tax returns are required to wipe Orkan  activities export and import by using IT-based reporting. This study aimed to analyze and design  databases to support the reporting of customs based report format for Director General of Customs and Excise No. PER-09/BC/2014. Data collection used was the Fact Finding Techniques consisted of studying the documents, interviews, observation, and literature study. The methods used for Design Database System is DB-SDLC (System Development Life Cycle Database), namely: Conceptual Design, Design Logical and Physical Design. The result obtained is ERD (Entity Relationship Diagram) that can be used in the development of Customs Reporting System in companies throughout Indonesia. In conclusions, ERD has been able to meet all the reporting elements of customs.
Penerapan Teknik Seo (Search Engine Optimization) pada Website dalam Strategi Pemasaran melalui Internet Lukito, Rony Baskoro; Lukito, Cahya; Arifin, Deddy
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.v5i2.2363

Abstract

The purpose of this research is how to optimize a web design that can increase the number of visitors. The number of Internet users in the world continues to grow in line with advances in information technology. Products and services marketing media do not just use the printed and electronic media. Moreover, the cost of using the Internet as a medium of marketing is relatively inexpensive when compared to the use of television as a marketing medium. The penetration of the internet as a marketing medium lasted for 24 hours in different parts of the world. But to make an internet site into a site that is visited by many internet users, the site is not only good from the outside view only. Web sites that serve as a medium for marketing must be built with the correct rules, so that the Web site be optimal marketing media. One of the good rules in building the internet site as a marketing medium is how the content of such web sites indexed well in search engines like google. Search engine optimization in the index will be focused on the search engine Google for 83% of internet users across the world using Google as a search engine. Search engine optimization commonly known as SEO (Search Engine Optimization) is an important rule that the internet site is easier to find a user with the desired keywords.
Evaluasi Pengendalian Sistem Informasi Penjualan Pada PT. XYZ Husni, Hari Setiabudi; Tandra, Tan Willy; Anugrah, Ade
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.v1i2.2652

Abstract

The objective of this research is to evaluate sales information system that is ongoing in PT XYZ and to identify problems in sales system and also to recommend a renovation suggestion towards sales application so it goes well, accurate, and high-quality. The research method in this paper is including important data and information collecting, literature study and field research: observation, interview and questionnaire. The result is identified that sales information system controlling in PT XYZ still needs development especially in upgrading system and recruitment in IT division to supervise application system to avoid potential risks that will influence targeting company objective. 
Implementasi Mekanisme Keamanan Data dengan Enkripsi Symmetric Key dan Checksum Variable pada Game Online Darmadi, Herru
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.v4i2.2543

Abstract

This study discusses specifically the encryption mechanism that maintains the integrity of the game data on online games. The purpose of this study is to implement symmetric key encryption and checksum for score calculation. There are two methods conducted in this study: analysis and design. The analysis method isperformed in two ways: analysis of existing systems and analysis of literature study. System design method used is prototyping. The results obtained are implemented on online game competition ‘Expedisi Indosat’ through Facebook from 3 – 30 July 2011. The implementation of symmetric key encryption mechanism and the checksum is useful to maintain data integrity on games especially the results score when the game is running and when there is data transmission from the client to the server.
Analisis dan Perancangan Aplikasi Basis Data Penilaian Kinerja Karyawan menggunakan Metode 360-Degree Feedback Berbasis Web pada Pt Ifs Solutions Indonesia Huda, Choirul; Nugraha, Andika Gilang; Ghifari, Alwin; Dewangga, Axel Didha
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.v4i1.2789

Abstract

The purpose of this study is to analyze and design a database application for the assessment of employee performance to suit the needs of PT IFS Solutions Indonesia. This system creates and provides information quickly and accurately where the data is well integrated, so it can help the company to do an analysis and consideration for decision-making. The research methodology used includes library research, interviews with the HR company to obtain information about the system to be designed, and database design by creating conceptual models, logical models and physical models. After that, application design includes designing the DFD, menu structure, STD, and user interface. The result achieved is the creation of a web-based database application that can help decision-makers to support employees with good, more accurate, easier and quickly available when needed. The database application made can help companies manage and make decisions as well as produce better work.

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