• The Journal of Society for e-Business Studies
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• v.6 no.3
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• pp.115-126
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• 2001

In constructive view, acquiring knowledge is made by experiences among members or elements. The knowledge in e-learning system can be extended up to knowledge of teachers and knowledge. of operating managers. We have many difficult problems to develop and manage e-1earning system because demanders on e-learning system have various. requirements. In traditional education system demanders are learners but in constructive view demanders can be extended to learners and teachers, operating mangers on e-learning system., In this study, we design and implement e-learning system named kedu V.1. Kedu V.1 is developed considering interactions of extended demanders of e-learning system in constructive view. And this system based on Linux operation system and MySQL, PHP. Also this system have efficient transplantation and portability capabilities and reduced cost and labor in implementation of real e-learning system

• Genomics & Informatics
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• v.7 no.3
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• pp.175-177
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• 2009

We have developed WinBioDBs with Windows interfaces, which include importing modules and searching interfaces for 10 major public databases such as GenBank, PIR, SwissProt, Pathway, EPD, ENZYME, REBASE, Prosite, Blocks, and Pfam. User databases can be constructed with searching results of queries and their entries can be edited. The program is a stand-alone database searching program on Windows PC. Database update features are supported by importing raw database files and indexing after downloading them. Users can adjust their own searching environments and report format and construct their own projects consisting of a combination of a local databases. WinBioDBs are implemented with VC++ and its database is based on MySQL.

• Proceedings of the Korean Society for Bioinformatics Conference
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• 2005.09a
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• pp.47-50
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• 2005

SGS (Splicing Graph Server) is as web application based on the MVC architecture with a Java platform. The specifications of the implemented design pattern are closely associated with the specific requirements of splicing graphs for analyzing alternative splice variants from a single gene. The paper presents the use of MVC architecture using JavaBeans as a model, with a JSP viewer and the servlet as the controller for this bioinformatics web application, with the open source apache/tomcat application server and a MySql database management system.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.05a
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• pp.342-346
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• 2003

Present CDMA technology is development continuously to internet technology and new communication infra called internet construction for quality of high quality offer the changing existent existence. wireless data communication area. In the meantime, our country is tunnel of whole country over 500 by special quality that is photograph because Safety diagnosis consists to manage preservation administration is in dangerous state about safety. Domestic telemeter technology is real condition that is depending on expensive foreign goods and engineer to improve that. Therefore tunnel preservationㆍadministration more improved telemeter system develop wish to this research uses CDMA net.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.10b
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• pp.1067-1070
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• 2001

인터넷의 사용이 폭발적으로 확산되고 있는 현 상황에서 인터넷을 매개로 한 첨단 업무 처리 환경의 구축 및 전사적인 지식 경영 체계가 자리를 잡아가고 있다. 특히 인터넷을 이용한 그룹웨어 시스템은 전자 우편, 전자게시판 등의 기본 기능을 기반으로 각종 통계, 명함관리, 일정관리 등의 업무처리 기능의 효율성을 배가함으로써 기업에서는 필수적인 시스템으로 자리잡게 될 것이다. 본 논문은 인터넷을 기반으로 한 그룹웨어 시스템에 대한 연구로써, Linux 시스템 상에서 PHP 와 MySQL 데이터베이스 그리고 무선인터넷을 위한 WML 및 MHTML을 사용해 중 소규모의 유무선 웹 기반 그룹웨어 시스템을 설계 구현했다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10c
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• pp.202-204
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• 2004

유비쿼터스 컴퓨팅 개념을 게임과 애니매이션 그리고 메신저에 응용한 3-D Pet Messenger (3PM)을 설계하고 개발하였다. 요즘 검색엔진과 뉴스 서비스를 주로 제공하던 포털들이 메신저를 기반으로 하는 포털로 변신하고 있다. 3PM은 일상어 인 메신저 기반 포털 (Portal)을 유비쿼터스 컴퓨팅 개념과 육성 시뮬레이션 게임을 접목시켜서 발전적인 새로운 형태의 메신저를 지향하고 있다. 육성 시뮬레이션 게임에서는 3-D Pet을 양육하는 게임으로서 사용자가 자신의 사이버 애완동물을 다른 사용자에게 보낼 수도 있다. 만일 사용자가 다른 컴퓨터로 이동하면, 그 사이버 애완동물도 그 사용자를 따라가서 필요한 최신의 정보를 제공할 수 있도록 제작되었다. 유비쿼터스 개념에 기반을 둔 메신저와 3-D 애완동물을 이용한 육성 시뮬레이션 게임이 통합되도륵 시스템이 설계되었고, Visual C++/MySQL/OpenGL/3Ds Max등의 도구들을 이용하여 시작품을 제작하였다.

• Journal of Korea Society of Digital Industry and Information Management
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• v.13 no.4
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• pp.25-31
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• 2017

In this paper, we propose a study on DB-based automatic crop cultivation that obtains crop cultivation data using IOT and automatically controls the cultivation environment using it. A system for DB-based automatic crop cultivation that automatically controls the cultivation environment is composed of a management server and a local controller. The management server was implemented using the MySQL DB in the Linux server system, and the local controller was designed and manufactured using the WiFi module and ARM Coretax-3 series MCU and confirmed its operation in the laboratory. The purpose of this study is to provide the optimal cultivation data and to grasp the cultivation status in real time when the knowledge of professional cultivation is needed like the farmers of ear farm villages. Research should continue to enable the cultivation of crops to reflect the requirements of each user.

• Korean Management Science Review
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• v.27 no.3
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• pp.33-41
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• 2010

A lot of researches find negative volatility risk premium in options market. We can make a trading profit by exploiting the negative volatility premium. This study proposes negative volatility risk premium hypotheses in the KOSPI 200 stock price index options market and empirically test the proposed hypotheses with intra-day short straddle strategy. This strategy sells both at-the-money call option and at-the-money put option at market open and exits the position at market close. Using MySQL 5.1, we create our database with 1 minute option price data of the KOSPI 200 index options from 2004 to 2009. Empirical results show that negative volatility risk premium exists in the KOSPI 200 stock price index options market. Furthermore, intra-day short straddle strategy consistently produces annual profits except one year.

• International journal of advanced smart convergence
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• v.9 no.3
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• pp.239-245
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• 2020

The Ewha Music Database (EMDB) is an online database comprised of primary source materials related to music education from East Asia during the modern era (1880 to 1945) when Korea, Japan, and China were geopolitically and culturally intertwined. We developed the incipit search in EMDB as an embedded tool. This is the first attempt in Korea to implement a unique search function of musical data using alphabets of musical notes. Unlike in traditional search system that uses general literature information search conditions, such as author, title, publisher, year, number of pages, etc., it offers a new way of searching a musical piece/work and sheet music. This study confirms that digital information technology is an important methodology for research of music culture as a field of humanities.

• Journal of Industrial Technology
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• v.31 no.B
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• pp.99-105
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• 2011

Recently, smartphones have been widely used in wireless communications which caused severe data overload in cellular networks. Cellular companies consider increasing wireless data capacity in overloaded areas. Determining overloaded areas is mainly made from user reports which are currently collected by calling or simple apps by some active users experiencing overloads. Since the current reporting method is inconvenient and does not contain detail information about the overload conditions, and therefore is used by only some active users, the overloaded areas determined from the reports are not likely to be accurate. Therefore, we need a new reporting method which is convenient enough for even inactive users to willingly report the overload condition and which delivers detail information about the overloads. In this paper, we design and implement a measurement function of smartphone's WCDMA communication quality including overload condition and management system of mobile wireless communication networks about smartphones' communication quality.