• Journal of electromagnetic engineering and science
• /
• v.13 no.2
• /
• pp.86-92
• /
• 2013

The present paper defines diversity gain for stationary users. This deals in particular with gathering the received signal statistics over possible user positions and orientations in space rather than over time, and to define a meaningful diversity gain related to the cumulative improvement of the performances of the 1% users with the worst receiving conditions. The definition is used to evaluate diversity gain for some typical small antennas in an extreme environment with only line-of-sight (LOS). The LOS environment is regarded as user-distributed 3D-random LOS caused by the statistics of an ensemble of stationary users with arbitrary orientations in the horizontal plane (2D), and with arbitrary orientations of their wireless devices in the vertical plane. Thus, an overall 3D-random distribution of user orientation is assumed.

• Journal of the Korean housing association
• /
• v.17 no.6
• /
• pp.37-44
• /
• 2006

By 2019, Korea is expected to be an aged society, age group of 65 and older being over 14% of the total population, considering their rapid increase today. The number of the elderly living alone or with his or her spouse will grow more and more. So this study was intended to find out the characters of elderly gathering houses in Japan through case study. The survey was taken by literatures and interview taken from the managers of the houses. It was selected the company which had branched 17 buildings all over the nation. There are three types in units in the building. One is self-supporting life house type. The other is personal care senior house type. Another is complex community house type. And the house have pointed on the participation in community. The company has attached great importance to form the co-operation network with the residents being shared same building. And it has aimed that the residents would feel being alive in their home.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2002.11a
• /
• pp.719-722
• /
• 2002

임베디드 시스템을 이용하여 TCP/IP 상의 인터넷 제어시스템을 구현하였다. AT90S8535 마이크로 컨트롤러 구조 및 각종명령 레지스터 동작 원리, avr-gcc 하드웨어 프로그래밍 및 명령 레지스터의 구현원리, JAVA 애플릿 프로그래밍, 전반적인 하드웨어 기초 이론을 바탕으로 Mellow Device 1300 임베디드 시스템과 AVR90S853S 마이크로 컨트롤러 상호간의 시리얼 통신을 이용하여 원격지의 온/습도 검침 및 각종 하드웨어 디바이스의 on/off를 구현하도록 설계하였고 실시간으로 검출된 온/습도 데이터를 JAVA 애플릿을 이용하여 그래픽 챠트로 보기 쉽게 표현하였으며 A/D 변환된 온도 및 습도 데이터와 각종 H/W 디바이스 on/off 상태 데이터를 RS232 인터페이스를 이용하여 Mellow Device 1300로 송/수신하도록 구현하였다.

• Journal of the Korea Institute of Military Science and Technology
• /
• v.13 no.6
• /
• pp.1080-1090
• /
• 2010

A study for improvement of credibility on test & evaluation result of interoperability in battle management information system which focused in C4I systems is very essential in rapid change of battle field environment. Realization of effective operation process with integration of developed IT also core factor for reducing of operational response time such as information gathering from sensor to shooter, time for commander's decision making. Therefore, by required to meet of high technical T&E, meet of complex software's user requirement, long-term system development period, system integration ability's request by various linkage of systems, it is high a M&S dependency to optimal performance, interpoerability's guarantee. Especially credibility on test & evaluation using M&S is very important. This paper will propse a VV&A applied methods using other VV&A case to improve credibility of M&S on test & evaluation.

• Journal of information and communication convergence engineering
• /
• v.9 no.1
• /
• pp.64-68
• /
• 2011

On the limited urban area, precise measurement of meteorological data is not easy for the cost problem. The facilities collecting the data require high installment costs. The mobile sources can be a solution in city region. For example, a public bus on which some meteorological sensors are installed can act as moving information gathering station. The information is gathered on a server and aggregated to generate useful information for smart phone application. To implement the services, several obstacles are exists. This paper studies on a design of this mobile meteorological information service system for urban area.

• Proceedings of the Korean Institute of Interior Design Conference
• /
• 2004.11a
• /
• pp.175-176
• /
• 2004

Housing culture has rapidly changed since apartments were first introduced in the 1970's. Among our living spaces, particularly, the kitchen reflects our lifestyle and its changes are more remarkable. Activities in kitchen areas include a diverse range of behaviors such as greeting guests, conversation, and family gathering besides cooking and dining. kitchen areas would not be the dedicated housewives' area, but rather a space for all family members. Kitchen areas become a 'living center' where all family members get together and have various family activity. This housing project was designed for the double income family who is consisted of 4 persons. The total area of Apt was 237.6M2. A residence is always comfortable, resting, and consistent for the family. Intimacy image, functional equipments and space, healthy materials were used for this project.

• IE interfaces
• /
• v.10 no.3
• /
• pp.33-41
• /
• 1997

With the enormous growth of the Internet, an increasing number of people in corporations use the Internet for communicating with the outside world, for gathering information, and for doing business. Internet technology may have its greatest impact not on general culture, but rather on corporations. It has already begun to revolutionize the way that companies operate and do business. When Internet technology is applied and used inside a corporation, and open only to its employees, it is referred to as an Intranet. The same technologies that underlie corporate Intranets form the basis of the larger Internet. The benefit of Intranet is 1) low construction cost 2) easy system management 3) friendly user interface 4) OS and H/W independent, etc. This paper provides the concept of Internet and Intranet, compares client/server and Intranet environment, and propose case study of implementation from client/server to Intranet environment.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2016.05a
• /
• pp.649-651
• /
• 2016

Wireless Sensor Network(WSN) consists of spatially distributed sensors to monitor physical conditions, such as temperature, light and motion, and to pass their data through the network to a base station. Each battery equipped node is consumed to pass their data to their neighbors. We are gathering the amount of energy that was consumed to gather data and to pass it This paper describes processes of energy consumption of WSN in Matlab.

• The Transactions of the Korea Information Processing Society
• /
• v.7 no.5S
• /
• pp.1657-1665
• /
• 2000

Mobile agents based e-commerce system has many advantage than traditional e-commerce-information gathering on goods, price settlement and payment, delivery of the goods purchased, and so on. However, due to the security vulnerability that stems from mobile agent's mobility, mobile agents based e-commerce system has additional security problems. Therefore, in order to do e-commerce securely in th system, first of al the security issues on mobile agents must be addressed. It this paper, we propose a mobile agent transfer protocol that provides confidentiality and integrity of mobile agent in transit and mutual authentication for communicating hosts. We further show the security of the protocol against many possible attacks. Also, we suggest the location management mechanism of mobile agents based on the trust center. This mechanism is capable of finding their locations transparently and detecting mobile agent clones.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2009.10a
• /
• pp.250-253
• /
• 2009

Effective methods for monitoring the quality of polycrystalline silicon (poly-Si) films are discussed. Raman spectroscopy is typically used to determine crystallinity of poly-Si, but this method has limitations for data gathering on large substrates for mass production of poly-Si TFT backplanes. Spectroscopic ellipsometry is proposed as an alternative for fast and simple estimation of poly-Si quality on large substrates. By using both ellipsometry and Raman spectroscopy, it is possible to determine whether the quality and uniformity of the poly-Si films meet the criteria required for mass production of TFT backplanes for AMOLED panels.