• 한국건설관리학회논문집
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• 제19권3호
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• pp.11-22
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• 2018

건축물 화재상황에서 피난시간을 감소시키기 위한 기존의 노력들은 피난시간의 구성요소 중 피난행동시간을 감소시키는 데 집중되었다. 그러나 피난행동시간의 비율이 전체 피난시간의 1/3임에도 불구하고 이를 제외한 인지시간과 초기대응행동시간을 감소시키기 위한 고려는 부족한 실정이며, 특히 피난행동시간만을 감소시킴으로써 피난성공률을 향상시킬 수 없는 상황이 발생하게 되었다. 따라서 인지시간과 초기대응행동시간을 감소시킬 수 있는 재난정보라는 개념이 주목 받게 되었다. 본 연구는 재난정보가 재실자특성에 작용하는 과정을 분석하기 위해 피난시간의 감소 측면에서 10가지 주요 재난정보와 3가지 재실자특성 요소의 관계를 설명하는 재난정보-재실자특성 연관성을 도출하였다. 또한 노인, 지적장애인, 청각장애인과 시각장애인을 대상으로 설문조사를 통한 가상의 피난실험을 수행, 재난정보가 재실자특성에 작용하는 과정을 부족한 재실자특성을 보완하여 최저수준의 화재안전성을 확보하는 과정과 일정 수준 보유한 재실자특성을 극대화하여 화재안전성을 확보하는 과정으로 분석하였다. 본 연구를 통해 직관적인 수준에서 설명되는 기존의 재난정보-재실자특성 간의 관계에 피난시간의 감소라는 관점에서의 설명력을 더하였고, 향후 다양한 재실자 유형이 존재하는 상황에서의 재난정보 관계에 대하여 후속연구가 진행된다면 재난정보와 재실자특성을 고려하는 후속 연구에 기초적 자료를 제공할 것으로 기대된다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권4호
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• pp.1796-1816
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• 2020

The health and safety of elderly and disabled patients who cannot live alone is an important issue. Timely detection of sudden events is necessary to protect these people, and anomaly detection in smart homes is an efficient approach to extracting such information. In the real world, there is a causal relationship between an occupant's behaviour and the order in which appliances are used in the home. Bayesian networks are appropriate tools for assessing the probability of an effect due to the occurrence of its causes, and vice versa. This paper defines different subsets of random variables on the basis of sensory data from a smart home, and it presents an anomaly detection system based on various models of Bayesian networks and drawing upon these variables. We examine different models to obtain the best network, one that has higher assessment scores and a smaller size. Experimental evaluations of real datasets show the effectiveness of the proposed method.

• Earthquakes and Structures
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• 제13권5호
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• pp.473-484
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• 2017

The objective of this paper is to report on a study of the use of unstiffened thin steel plate shear walls (SPSWs) for the seismic performance improvement of reinforced concrete frames with deficient lateral rigidity. The behaviour of reinforced concrete frames during seismic activities was rehabilitated with an alternative and occupant-friendly retrofitting scheme. The study involved tests of eight 1/3 scale, one bay, two storey test specimens under cyclic quasi-static lateral loadings. The first specimen, tested in previous test program, was a reference specimen, and in seven other specimens, steel infill plates were used to replace the conventional infill brick or the concrete panels. The identification of the load-deformation characteristics, the determination of the level of improvement in the overall strength, and the elastic post-buckling stiffness were the main issues investigated during the quasi-static test program. With the introduction of the SPSWs, it was observed that the strength, stiffness and energy absorption capacities were significantly improved. It was also observed that the experimental hysteresis curves were stable, and the composite systems showed excellent energy dissipation capacities due to the formation of a diagonal tension field action along with a diagonal compression buckling of the infill plates.

• 대한건축학회논문집:구조계
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• 제35권5호
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• pp.181-190
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• 2019

In high school classrooms, it is reported that ventilation is often insufficient, increasing health risks among students. Therefore, indoor air quality in school classrooms is very important in terms of students' health and learning abilities. In this study, the effect of window opening, which is a control mechanism for air control in summer 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. It was found that change rate of $CO_2$ concentration in classroom was effectively reduced by carrying out activity of opening the window by active environment control activity of occupants at break time, intermission time and cleaning time. And optimal window opening by students was presented to prevent unpleasantness and degradation of indoor air quality and the effects were analyzed.

• 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.