• Journal of Communications and Networks
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• 제6권3호
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• pp.226-234
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• 2004

This work presents a deterministic channel that rules according to inverse a power propagation law. The proposed channel model allows us to derive the lower bound and upper bound of packet's capture probability in Rayleigh fading and shadowing cellular mobile system. According to these capture probabilities, we analyze the system performance in the case of finite stations and finite communicated coverage of a base station. We also adopted a dynamic backoff window size to discuss the robustness of IEEE 802.11 draft standard. Some suggestions and conclusions from numerical results are given to establish the more strong CSMA/CA protocol.

• 전자공학회논문지B
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• 제33B권7호
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• pp.51-59
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• 1996

The current network environment is composed of heterogeneous H/W and S/W resources. Integrating CSCW applications in such heterogeneous environments is highly complex. This paper describes the design and implementation of ASS (application sharing server) which supprot sharing of a single application between different operating systems. The ASS supports cooperative work among user group using its own window system (X-windwo or MS-windwos). We adopted improved managing heavy-weight data. ASS also provides development environment for vaious groupware application.

• 동서간호학연구지
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• 제23권1호
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• pp.45-52
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• 2017

Purpose: This study was to identify the effects of self-resilience and social support on reality shock among new graduate nurses. Methods: The data was collected using self-reported questionnaires from a convenience sample of 111 new graduate nurses. The data was analyzed by descriptive statistical, independent t-test, ANOVA, Scheffe test, Pearson correlation coefficient, and multiple regression via the SPSS Window 23.0 program. Results: Among general and work related characteristics, factors that have shown significant differences on reality shock were gender (t=-2.29, p=.024), work unit (t=3.31, p=.023) and whether they are working at unit they desired (t=-5.08, p<.001). Reality shock has shown a negative correlation with self-resilience (r=-.51, p<.001) and social support (r=-.41, p<.001). Factors that affected the reality shock on new graduate nurses were self-resilience (${\beta}=-.43$, p<.001), whether they are working at unit they desired (${\beta}=.35$, p<.001) and their currently work unit (${\beta}=-.17$, p=.028). These factors take into account of 38.0% of overall reality shock. Conclusion: The results suggest that self-resilience, desired unit and current work unit should be considered as factors when developing an intervention to alleviate the reality shock experienced by new graduate nurses.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2009년도 제38회 동계학술대회 초록집
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• pp.241-241
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• 2010

New non-volatile memory with high density and high work-function metal nano-dots, MND (Metal Nano-Dot) memory, was proposed and fundamental characteristics of MND capacitor were evaluated. In this work, nano-dot layer of FePt with high density and high work-function (~5.2eV) was fabricated as a charge storage site in non-volatile memory, and its electrical characteristics were evaluated for the possibility of non-volatile memory in view of cell operation by Fowler-Nordheim (FN)-tunneling. Here, nano-dot FePt layer was controlled as a uniform single layer with dot size of under ~ 2nm and dot density of ${\sim}\;1.2{\times}10^{13}/cm^2$. Electrical measurements of MOS structure with FePt nano-dot layer shows threshold voltage window of ~ 6V using FN programming and erasing, which is satisfied with operation of the non-volatile memory. Furthermore, this structure provides better data retention characteristics compared to other metal dot materials with the similar dot density in our experiments. From these results, it is expected that this non-volatile memory using FePt nano-dot layer with high dot density and high work-function can be one of candidate structures for the future non-volatile memory.

• 대한건축학회논문집:구조계
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• 제36권4호
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• pp.163-172
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• 2020

In this study, the effect of window opening, which is a control mechanism for air control in winter high school classrooms, on the change in air and indoor environment of the classroom was analyzed and physical conditions of indoor and air environment were observed during the classroom course, and satisfaction of the students and teachers was assessed with questionnaires. And the changes in air environment were assessed by the performance of the duster cleaning work in the classroom. It was found that 84.6% of the students surveyed said the air was stuffy. And among the alternatives, opening windows all times during class was most effective in reducing CO₂ concentration and PM concentration was measured within classroom's standard. In addition, the concentration change rate of duster cleaning work was reduced by 74.4% and 65.4% of PM10 compared to broom cleaning work.

• 한국조리학회지
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• 제18권2호
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• pp.1-18
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• 2012

특급호텔에 종사하는 조리사들을 대상으로 멘토역할이 직무성과와 직무만족에 미치는 영향을 알아보기 위해서 부산 및 울산 지역의 특급 호텔 조리사를 대상으로 조사하였다. 192부의 유효 표본을 얻었다. 수집한 자료의 통계처리 및 분석방법은 사회과학 통계프로그램인 SPSS/PC+ for Window 12.0을 이용하여 빈도분석, 요인분석 및 신뢰성 분석, 회귀분석을 실시한 결과첫째, 경력 기능 요인이 멘토와 멘티간의 긴밀한 공감대와 협조관계가 형성되어 조직의 목표를 달성하고 높은 수준의 서비스를 제공할 수 있는 것으로 나타났다. 둘째, 멘토역할의 업무수행 및 보호기능은 멘토의 역할로 인하여 개인의 미래발전에 도움을 주고 전문적인 업무의 기회를 부여함으로써 직무성과의 적극적인 계획과 실행을 실천할 수 있다고 나타났다. 셋째, 멘토역할의 사회적 기능 요인은 개인적인 접촉으로 공감대를 형성하여 원만한 조직 관계를 유지하고, 근무 환경만족 요인에 영향을 미치는 것으로 나타났다. 이상의 결과와 같이 멘토역할은 조리사들에게 직무에 대한 성과와 만족에 긍정적인 정(+)의 영향을 미치며 직무에 대한 성과와 만족도를 향상시켜주는 것으로 나타났다. 따라서 아직 호텔 주방에서는 일부 업체에서 실시하거나 아직 활성화 단계는 아니다. 앞으로 공식적인 호텔 주방에도 기술과 노하우를 곳에는 멘토링 제도를 활성화 시키 다양한 노력을 통해 조직의 직무성과와 직무만족을 통해 호텔 기업의 경영성과와 경쟁력을 높이는 방안으로 활용해야 할 것이다.

• 동력기계공학회지
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• 제12권3호
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• pp.32-37
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• 2008

The present work aims to determine the overall pressure losses in the shell from the point of entry of the fluid to the outlet point of fluid of shell and tube heat exchanger. The main contribution of the present work is concerned with calculating the pressure drop in the interior section and window section. Shell-side flow velocity distributions have been evaluated. We assume that the shell-side fluid is turbulent. The calculation procedure is based upon the Delaware method. Evaluation of pressure drop on the shell side will be helpful for a designer or manufacturer of a heat exchanger.

• 한국가구학회지
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• 제24권3호
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• pp.302-308
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• 2013

To collection of field data for development of maintenance manual of Han-ok, we investigated defects which occurred in members of Han-ok by field investigation. The noticeable defects were wood cracks, gaps that developed between wood pillar and wall or wood window frame and tenon joints. The most common biological defect was blue stain which was created in log. The mold generation was observed on exterior wood and wall which get wet by precipitation. The gaps between members of Han-ok pointed out as defect that is urgently improved by residents of Han-ok. The reason is mainly due to poor of insulation in winter by bad confidentiality. The maintenance work of defect such as gap was conducted personally. As a result, the repair parts were ugly for unfamiliar repair work.

• 한국콘텐츠학회논문지
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• 제9권12호
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• pp.592-599
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• 2009

본 논문은 사용자와 로봇의 통신을 통해 인간의 손을 대신하여 드로잉(Drawing)을 하는 시스템 설계 및 구현을 하였다. 컴퓨터 안에서 작업을 볼 수 있는 가상 환경과 실제 로봇(Robot)이 드로잉을 하는 현실 환경을 연동하기 위한 UI(User Interface)를 제공하여 사용자의 편의를 돕는 시스템을 제작하였다. 시스템의 UI는 넷빈(NetBean) 툴 안에서 AWT(Abstract Window Toolkit)를 이용하였고, 드로잉을 하기 위해서 벡터(Vector) 방식의 SVG(Scalable Vector Graphics) 파일을 기반으로 하여 이미지 정보를 얻어 표현하였다. 이 시스템은 실시간 통신으로 사용자 요구에 따라 원하는 이미지를 만들어 낼 수 있으며, 이미지 작업의 결과에만 그치는 것이 아닌 드로잉을 하는 과정에서 하나의 퍼포먼스(Performance)로 작용할 수가 있다. 본 연구는 사용자의 선택에 따라 실시간으로 작동하는 모습을 통하여 드로잉 하는 작업 과정 자체를 하나의 퍼포먼스로 볼 수 있도록 한다.

• 디지털융복합연구
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• 제18권8호
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• pp.263-270
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• 2020

본 연구는 응급구조(학)과 대학생을 대상으로 전공선택동기와 직업가치관이 취업준비행동에 미치는 영향을 파악하고, 이의 결과를 토대로 취업준비행동 향상을 위한 기초자료를 제공하고자 시행하였다. D광역시, J도 소재 3·4년제 대학 응급구조(학)과 대학생을 대상으로 2019년 11월 4일부터 8일까지 연구 참여에 대한 동의를 받은 후 자기기입식 설문조사를 하였다. 수집된 자료 중 응답이 미비한 9부을 제외한 341부를 SPSS ver. 12.0(Window)으로 최종 분석하였다. 본 연구결과, 취업준비행동에 전공선택동기의 개인적 동기, 직업가치관의 내재적 직업가치관, 외재적 직업가치관 순으로 영향을 미쳤다. 따라서, 성별 및 학년의 특성과 전공선택동기 및 직업가치관의 특성을 고려하여, 개별 및 집단 상담과 정규 또는 비정규 교육과정에서 직업가치관 강좌의 개설이 필요하다고 사료된다.