• Smart Structures and Systems
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• 제15권3호
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• pp.913-929
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• 2015

Hybrid simulation is increasingly being recognized as a powerful technique for laboratory testing. It offers the opportunity for global system evaluation of civil infrastructure systems subject to extreme dynamic loading, often with a significant reduction in time and cost. In this approach, a reference structure/system is partitioned into two or more substructures. The portion of the structural system designated as 'physical' or 'experimental' is tested in the laboratory, while other portions are replaced with a computational model. Many researchers have quite effectively used hybrid simulation (HS) and real-time hybrid simulation (RTHS) methods for examination and verification of existing and new design concepts and proposed structural systems or devices. This paper provides a detailed perspective of the enabling role that HS and RTHS methods have played in advancing the practice of earthquake engineering. Herein, our focus is on investigations related to earthquake engineering, those with CURATED data available in their entirety in the NEES Data Repository.

• International Journal of Contents
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• 제9권2호
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• pp.22-26
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• 2013

Comparing online and paper-based environment for report submission and correction, the former supersedes to the latter, since (1) the turn-around time becomes shorter, (2) teaching opportunity increases, and (3) as a consequence, the student's achievement level becomes higher in the online environment. In this paper, we propose an annotation tool GABA for PDF document in order to reduce correction time by the teachers and to facilitate instruction to students. In a usual class, the same or similar assignments are given to the students. Then it is often the case that many students make similar mistakes. A teacher can register and classify common correction comments to GABA. Report correction time becomes significantly shorter by reusing the registered comments. GABA also provides various support functions in order to assist efficient checking of numerous report files such as (1) sorting of frequently-used comments, (2) similarity-based file sorting, and (3) cross tabulation of comments using category and weight.

• Journal of Trauma and Injury
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• 제29권4호
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• pp.139-145
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• 2016

Purpose: The major pelvic trauma results in high mortality with associated fatal other injuries. During early stage of resuscitation, multidisciplinary approach is essential to improve the survival and outcomes. This study aims to report the effect and positive outcome of the trauma team approach on the management of hemodynamically unstable pelvic bone fracture. Methods: This retrospective review included all patients with hemodynamically unstable pelvic bone fracture admitted between March 2007 and December 2015. Patients were divided into group A, which comprised those admitted before the trauma team approach was started, and group B, which comprised those admitted after the approach was started. The advanced trauma life support protocol was followed for all patient. The comparisons between the two groups were based on medical records. Study variables included demographics, initial vital sign, injury severity score, fracture type, and injury mechanism. We analyzed the outcomes in each group with respect to the time interval for doctors' arrival, total length of stay in the emergency department (ED), time interval for computed tomography evaluation, 24-hour mortality, time interval for definitive fixation, and definitive fixation in the time-window of opportunity. Results: Fifty-three patients met the inclusion criteria. No statistically significant differences in demographic data existed between the two groups. The time interval for doctors' arrival (min, $63.09{\pm}50.48$ vs $21.48{\pm}17.75$; p=0.038) and total length of stay in the ED (min, $269.33{\pm}105.96$ vs $115.49{\pm}56.24$; p=0.023) were significantly improved. The 24-hour mortality was not significantly different between the two groups.(%, 14.3 vs 12.0; p=1.000) However, the time interval for definitive fixation and definitive fixation in the time-window of opportunity showed better results. Conclusion: The trauma team approach has positive effects, which include initial resuscitation through multidisciplinary approach and shortening the time interval to definitive fixation, on the management of hemodynamically unstable pelvic bone fracture.

• 한국생활과학회지
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• 제22권6호
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• pp.571-586
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• 2013

The purpose of this study was to examine educational meanings of snack and lunch time of 4-year-old children and their teachers in a kindergarten class. The study was done in the Class of 4-year-old children in S Kindergarten located in Songpa-gu, Seoul. And 30 children of this class, Teacher A who is the teacher in charge of the Class, and Teacher B who is the researcher and teacher in charge of it participated in it. The study was carried out by the ethnography method and data collection was done through participation observation, interviews, video and voice recording, and data collection of photography shooting. The results are as follow: First, the children had private conversations, shared their cultures, deepened and expanded their existing concepts, expressed their emotions and relieved their tension, and strengthened relations with friends during the snack and lunch time. Second, the teachers promoted conversation and communication, gave the opportunity that the children can set the lunch table by themselves and tried to make the snack and lunch time with the children by discussing what they are how they are operated with them together. In conclusion, the snack and lunch time can be more meaningful time for children when there are proper educational plans and support of teachers which are considered children's viewpoints.

• 가정과삶의질연구
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• 제22권5호
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• pp.29-45
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• 2004

This ethnographic case-study explores the interpretation and behavior in job considering among full-time housewives. The participants of this study are eleven middle class full-time housewives in their thirties and forties. In-depth interviews based on an unstructured Questionnaire were conducted for this study. Findings are as follows: Six full-time housewives tend to think their full-time housewife-lives more convenient, something unable to substitute and more profitable compared to the counter partner's lives. But they are classified into two groups according to the satisfaction for full-time housewife life. One group has found out more positive meaning in their life but the other group has not yet and they are doubtful about real life and other opportunity. In Contrast, other five full-time housewives tend to interpret employment as a more productive source to secure family resource for their children's education and repay the loan used to buy larger apartment. And the job is considered to confirm her own individuality and the feeling for the social entity as a competent social entity. But two of them who have never been employed do not try to get a job as a new identity alternative. And the various elements like household income, job experience, health, children's age and husband's attitude to his wife's employment etc. are defined to influence the interpretation and the job considering behavior among full-time housewives.

• 한국정보전자통신기술학회논문지
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• 제11권3호
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• pp.215-220
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• 2018

중견/중소 IT기업의 사업 수행 기회 증대, 기회 균등과 역량 강화라는 취지로 소프트웨어(SW)산업진흥법 개정으로 공공정보화시장에 대기업 참여를 제한되었다. 이러한 환경에서의 중견/중소 SW기업들의 사업을 수행하면서 발생한 사업 수행 역량 미흡으로 공공정보화사업의 품질저하, 위험관리 미숙, 일정관리 저하 등 여러 문제점을 발생시키고 있다. 이를 해결하기 위해 본 논문은 시스템통합 사업 수행 시 품질 저하 요인을 도출하였으며, 이를 해결하기 위한 방안으로 VISUALIZATION, 엄격한 시험관리, Agile방법론의 일부 활동을 적용하여 프로젝트를 수행하는 것을 제안했다. 이러한 방안을 중견/중소 IT기업이 개발한 보건의료 IT 프로젝트에 적용한 결과 의사소통의 개선, 수치화된 진척관리 및 프로젝트의 가시성이 개선되었다. 또한, 결함 해결시간 최소화, 요구사항 커리리지 비율 개선, 불필요한 회의시간이 단축이 되어 품질 향상에 기여하였습니다.

• 한국통신학회논문지
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• 제33권4B호
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• pp.192-198
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• 2008

본 논문에서는, HCCA로 동작되는 IEEE 802.11e MAC의 Transmission Opportunity (TXOP) 구간을 동적으로 제어함으로서, 무선 Local Area Network (LAN) 환경에서 실시간 멀티미디어 트래픽의 전송 성능을 향상시키는 방식을 제안한다. 프레임의 전송 시기 및 시간을 결정하는 스케줄러의 기존 방식은 무선 단말의 전송률 변화에 상관없이 TXOP 구간을 고정하기 때문에 무선 통신 환경 변화를 동적으로 반영하지 못하는 문제점을 내포하고 있다. 이러한 문제점을 해결하기 위하여 제안방식에서는 무선 단말의 전송률이 낮아지더라도 TXOP 구간이 확대됨으로서, 사용자로부터 발생된 실시간 멀티미디어 트래픽의 전송이 최대한 유지될 수 있도록 한다. 제안방식의 성능 분석을 위해, IEEE 802.11e 참조모델과 함께 NCTUns 시뮬레이터를 이용한 모의실험을 수행하였으며, 그 결과 제안방식은 무선통신 거리 변화에 따른 전송률 변화에도 실시간 멀티미디어 트래픽의 전송이 효과적으로 이루어짐을 확인하였다.

• 문화기술의 융합
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• 제7권3호
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• pp.487-495
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• 2021

각자가 가진 모국어 능력을 활용한 외국어 오디오 콘텐츠 플랫폼 개발을 통해 보다 쉽고 재밌으며 또한 편리하게 외국어를 습득할 수 있도록 하는데 본 연구의 목적이 있다. 이를 위해 실생활에서 사용하는 모국어를 중심으로 오디오 콘텐츠를 거래할 수 있는 플랫폼을 제안한다. 일상생활에서 큰 노력을 들이지 않고 만들어낼 수 있는 콘텐츠들이 외국어 학습자들에게는 그 언어의 자연스러운 쓰임새를 배울 수 있는 소중한 콘텐츠로 사용되는 것이다. 현재 대다수의 외국어 학습 플랫폼은 콘텐츠 고갈과 낮은 콘텐츠의 실제성의 문제점을 안고 있다. 본 플랫폼을 통해 이러한 기존 단점들을 개선하여 학습자들에게는 외국어를 보다 현실적이고 효율적으로 배울 수 있는 기회를 부여함과 동시에 원어민들에게는 여유시간을 활용한 부가수익 창출 기회를 부여할 수 있을 것으로 기대한다.

• 한국주거학회논문집
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• 제27권5호
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• pp.73-81
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• 2016

Focused on developing form of Western architecture, invisible elements covering actual human life has been dealt with separately and the time was turned away and disparaged. But now the phenomenology, arranging such a meeting of space and time, gives opportunity to look at the actual life in architecture. Recently, Guille Deleuze and Merleau-Ponty tried to recover the sense of touch segregated in skin from body keeping eyes for distance. And the activity can be happened by being connected to the body rather than to eye in the space. From the phase of recognition where the human body tries to identify the object in the space considering a time, it will be changed for the subject to the phase of space-time structure. If the tactility is to erase the distance different from the visuality in dichotomy, it will be occurred to having a tension and makes new relationship to work trying to move the subjective point of view in object. Like this evidence in analysis of architecture, it can be found these in the Korean traditional architecture rather than Western architecture in terms of emphasizing the time and space. And this study will be intensive to the side of the Phenomenology how it is being connected to the movement in the space and time for the subject and object.

• 산업경영시스템학회지
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• 제13권21호
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• pp.91-100
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• 1990

This paper is concerned with the development of optimal algorithms for multi-stage flowshop scheduling problems with sequence dependent setup times. In the previous researches the setup time of a job is considered to be able to begin at the earliest opportunity given a particular sequence at the start of operations. In this paper the setup time of a job is considered to be able to begin only at the completion of that job on the previous machine to reflect the effects of the setup time to the performance measure of sequence dependent setup time flowshop scheduling. The results of the study consist of two areas; first, a general integer programming(IP) model is formulated and a nixed integer linear programming(MILP) model is also formulated by introducing a new binary variable. Second a depth-first branch and bound algorithm is developed. To reduce the computational burdens we use the best heuristic schedule developed by Choi(1989) as the first trial. The experiments for developed algorithm are designed for a 4$\times$3$\times$3 factorial design with 360 observations. The experimental factors are PS(ratio of processing time to setup time), M(number of machines), N(number of jobs).