• 반도체디스플레이기술학회지
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• 제14권2호
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• pp.9-16
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• 2015

In this paper, selection criterions on selection diversity are researched. The diversity is applied to the multiple antenna system based on wireless access in vehicular environment (WAVE) standard for rapid varying channel. Least squares (LS) based decision feedback equalizer (DFE) are used for channel equalization. Received signal is regenerated by means of the decision feedback path. In the selection diversity, the regenerated signal as well as the received signal is selected according to selection criterion. The decision feedback algorithm can follow the fast speed of WAVE fading channel. To control the tracking speed of the time-varying channel, simple low pass filter is used. Finally, the estimated channel value recovers the distorted payloads. Signal power before automatic gain control (AGC) in analog stage can be used as a selection criterion. In the digital stage, signal power after AGC, noise power after AGC, signal to noise ratio after AGC and cross-correlation method can be used as selection criterions. According to the simulation results, the performance of the selection diversity is improved in comparison with that of the combining diversity for the WAVE fading channel.

• 가족자원경영과 정책
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• 제2권2호
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• pp.53-65
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• 1998

This study was designed to examine the decision-making and family life satisfaction of the urban middle-aged housewives from the ecological perspective. The main purpose of this study was to investigate the effects of ecological enviornment variables(ie, natural physical-biological environment·social-cultural environment·human-built environment) and their dicision-making on their family life satisfaction. Also, it is to provide some fundamental information that helps to elevate the family life satisfaction of the unban middle-aged housewives. The subjects of this study were 305 housewives living in Seoul and Inchon area, whose age was from 40 to 59. The significant results were as follows: 1) Their decision-making was affected by the following variables in the order of health condition, fate-control orientation, husband’s support, monthly family income and the perception of the adequacy of household income. 2) The ecological environment variables which had an influence on family life satisfaction were the perception of the adequacy of household income, husband’s support, fate-control orientation, health condition and educational level. 3) From the regression analysis, the model was found to be highly significant, accounting for 44% of the variance. Thus, husband’s support was the strongest predictor variable.

• 상하수도학회지
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• 제31권5호
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• pp.409-414
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• 2017

In this study, we divided the process operation scenarios into three categories based on raw water temperature and turbidity. We will select and operate the process operation scenario according to the characteristics of the raw water. The number of algae in the DAF treated water has been analyzed to be less than 100 cells/mL. These results indicated that the DAF process is effective in removing the algae. In addition, the scenario of the integrated management decision algorithm of the DAF process was developed. DAF pilot plants ($500m^3/day$) process has shown a constantly sound performance for the treatment of raw water, yielding a significantly low level of turbidity (DAF treated water, 0.21~1.56 NTU).

• Journal of Computational Design and Engineering
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• 제2권3호
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• pp.148-156
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• 2015

Increased competitive challenges are forcing companies to find better ways to bring their applications to market faster. Distributed development environments can help companies improve their time-to-market by enabling parallel activities. Although, such environments still have their limitations in real-time communication and real-time collaboration during the product development process. This paper describes a web-based collaborative framework which has been developed to support the decision making on a 3D design developing process. The paper describes 3D design file for the discussion that contains all relevant annotations on its surface and their visualization on the user interface for design changing. The framework includes a native CAD data converting module, 3D data based real-time communication module, revision control module for 3D data and some sub-modules such as data storage and data management. We also discuss some raised issues in the project and the steps underway to address them.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2009년도 춘계 학술논문 발표대회 학계
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• pp.189-193
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• 2009

As large-scale buildings, skyscrapers, and multi-purpose buildings recently increase in numbers dramatically the internal space of such buildings becomes more and more large and complicated accordingly. The Multi-purpose buildings are increasing rapidly in number, and concerns over the evacuation process in case of fire emergency are also increasing. However, A controller who is responsible for visitor's safety makes a decision about measures for visitor safety in human based decision making process. Many potential accidents that are caused by human error lurk in results of the process. The accidents can be decreased by changing the decision making process from human-based into technology-based. Through this study, the way to improve current disasters prevention system is presented and it can also improve shelter inducement methods effectively. SICS(Spatial Information Control System) which is being studied in other research is used as the tool for improvement.

• 한국컴퓨터산업학회논문지
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• 제2권10호
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• pp.1355-1364
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• 2001

내부회계통제는 자산을 보호하고 회계자료의 정확성과 신뢰성을 검증하고, 운영의 효율성을 촉진하며 미리 정한 경영정책의 실행을 촉진하기 위하여 경영조직의 계획과 기업이 채택한 조정방법과 조치를 포함한다. 내부회계통제는 다음과 같이 분류된다. l. 일반통제 : $\circled1$ 조직과 운영통제 $\circled2$ 시스템개발과 문서통제 $\circled3$ 하드웨어 통제 $\circled4$ 소프트웨어와 하드웨어의 접근 가능성에 대한 통제 $\circled5$ 일반적인 시스템의 보안 2.응용통제 : $\circled1$입력통제 $\circled2$처리과정 통제 $\circled3$출력통제 내부회계통제는 기업의 경영통제와 연계시킴으로서 총체적인 경영정보시스템을 구축할 수 있으며 의사결정자로 하여금 의사결정지원시스템을 구축할 수 있게 한다.

• 한국간호교육학회지
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• 제21권1호
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• pp.95-107
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• 2015

Purpose: The purpose of this study was to develop a tailored simulation learning (SL) program and to evaluate the effects of the program on the clinical competency, clinical decision-making competency, and communicative competency of new nursing staffs in intensive care units (ICU) and emergency rooms (ER). Methods: In this quasi-experimental study, fifteen nurses were assigned to the experimental group and fifteen to the control group. The experimental group was given the SL program of four sessions, whereas the lectures of four sessions were given to the control group. Data were analyzed using a $x^2$-test, Mann-Whitney U test, and Kruskal-Wallis test with an SPSS program. Analysis of covariance was used to treat the covariate of pre communicative competency between the experimental and control groups. Results: Based on the education needs of new nursing staffs in ICUs and ERs, three learning scenarios and one evaluating scenario were developed for the SL program. The score for clinical competency, clinical decision-making competency, and communicative competency were significantly higher in the experimental group compared with the control group. Conclusion: The SL program is an effective learning strategy for new nursing staffs in ICUs and ERs. These findings suggest that an SL program be offered as an alternative for new nurse orientation and continuing nurse education.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2015년도 추계학술대회
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• pp.794-797
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• 2015

최근 차량 네트워크 VANET(Vehicular Ad-hoc Network)에 대한 관심이 증가하면서 차량 간 비콘 메세지 전송에 관한 연구가 활발하게 이루어지고 있다. 교통 상황 및 안전 정보, 상업 서비스를 제공하기 위한 무선 전송 기술의 표준인 IEEE 802.11p/1609에는 시스템 제어 및 차량 안전 메세지 전송을 위한 CCH(Control Channel)와 비 안전 데이터 패킷을 전송하기 위한 SCH(Service Channel)가 존재한다. 하지만 하나의 CCH을 통해서 안전 메세지를 전송하기 때문에 차량의 밀도가 높아진 혼잡상황에서는 안전 메세지 전송문제가 발생할 수 있다. 본 논문에서는 차량 밀도가 높은 혼잡상황에서 안전 메세지를 전송할 수 있는 알고리즘을 제안한다. 제안된 알고리즘은 결정트리를 이용하여 우선순위를 결정하여 각 큐에 할당된 시간동안 저장된 메세지들은 CCH를 통해 높은 우선순위대로 차례로 전송한다. 제안된 알고리즘은 비콘 전송 지연을 감소시키고 IEEE 802.11p/1609.4 기반 네트워크에서 성공적인 비콘 수신확률을 증가시킨다.

• Journal of the Korean Data and Information Science Society
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• 제11권2호
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• pp.217-223
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• 2000

In this paper, we develop optimal decision interval exponentially weighted moving average(EWMA) scheme for the process mean and the reciprocal measure of dispersion of the inverse Gaussian distribution.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.1032-1035
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• 2003

The field of handwriting recognition has been researched for many years. A hybrid classifier has been proven to be able to increase the recognition rate compared with a single classifier. In this paper, we combine support vector machine (SVM) and hidden Markov model (HMM) for offline handwritten numeral recognition. To improve the performance, we extract features adapted for each classifier and propose the modified SVM decision structure. The experimental results show that the proposed method can achieve improved recognition rate for handwritten numeral recognition.