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장혜민,김보성,김민하,박혜민,김기태,옥영빈,이경복 한국감성과학회 2017 춘계학술대회 Vol.2017 No.-
본 연구는 대학생들의 스마트폰 중독과 학습동기조절 사이의 관계를 살펴보고자 수행되었다. 이를 위해 스마트폰 중독 설문지와 자기조절 학습의 학습동기조절 요인의 설문지를 활용하여 이들의 스마트폰 중독과 학습동기조절을 측정하였다. 그 결과, 스마트폰 중독은 학습동기조절과 유의미한 정적 상관관계를 보이는 것으로 나타났다. 세부적으로는 동기조절 요인 중 시험불안과 외현적목표 지향이 스마트폰 중독과 유의미한 정적 상관곽계를 보이는 것으로 나타났다. 이러한 결과는 스마트폰을 많이 사용할수록 학습동기조절에 부정적인 영향을 미치는 것을 알 수 있다. 학습목표에 도달하기 위한 일정한 시간이 존재하는데, 그 시간을 채워야 한다는 압박과 스마트폰 중독 행동 사이의 충돌로 인해 시험불안이 발생하는 것이다. 또한 스마트폰 사용기간이 증가할수록 능동적인 탐색이나 활동보다는 수동적으로 주어지는 정보에 익숙해져서 학습동기에서도 외현적으로 주어지는 목표에만 반응하게 된다는 것이다. 따라서 스마트폰 중독이 학습동기조절에 큰 영향을 미치는 것으로 해석할 수 있다.
Renal involvement in children and adolescents with inflammatory bowel disease
장혜민,백희선,김정은,김주영,이연희,조희연,최연호,Ben Kang,최병호,최봉석,조민현 대한소아청소년과학회 2018 Clinical and Experimental Pediatrics (CEP) Vol.61 No.10
Purpose: The incidence of inflammatory bowel disease (IBD) is rapidly increasing, and several reports have described the renal complications of IBD. We sought to evaluate the clinical manifestations of renal complications in children with IBD in order to enable early detection and prompt treatment of the complications. Methods: We retrospectively reviewed the medical records of 456 children and adolescents aged <20 years who had been diagnosed with IBD since 2000. We analyzed patient age, sex, medication use, IBD disease activity, and clinical manifestations of renal symptoms. Results: Our study comprising 456 children with IBD included 299 boys (65.6%) and 157 girls (34.4%). The study included 346 children with Crohn disease and 110 children with ulcerative colitis. The incidence of kidney-related symptoms was 14.7%, which was significantly higher than that in normal children. We observed 26 children (38.8%) with isolated hematuria, 30 children (44.8%) with isolated proteinuria, and 11 children (16.4%) with hematuria and concomitant proteinuria. A renal biopsy was performed in 7 children. Histopathological examination revealed immunoglobulin A nephropathy in 5 children (71.4%). All children presented with mild disease and well-controlled disease activity of IBD. Conclusion: Children with IBD are more likely to show kidney-related symptoms than healthy children and adolescents are. Therefore, regular screening of urine and evaluation of renal function in such children are necessary for early detection of renal complications.
건물형 전통시장의 유동인구 특성을 반영한군집별 보행속도 예측과 화재안전관리방안 제시
장혜민,황정하 대한건축학회지회연합회 2023 대한건축학회연합논문집 Vol.25 No.5
Evaluating fire hazards of buildings and establishing fire safety management measures are essential because fires can cause casualties and extensive property damage. In view of these factors, traditional markets have a high risk of fire hazards, as has been proven in many fire accidents. To address this issue, this study provides basic data for establishing fire safety management measures through clustering of markets by considering the building and human characteristics of markets. To that end, we conduct a cluster analysis with the building and human characteristics of markets as variables. We examine the fire hazards of each cluster derived as a result of the analysis and present a simple discussion about the establishment of fire safety management measures. Commercial building-type markets were classified into four clusters, and fire hazards and the directions for establishing fire safety management measures were proposed considering the characteristics of each cluster. This is the first study that clustered the markets in South Korea, and it is significant in that the results of this study can be used as basic data for establishing fire safety management measures for markets in the future.
무기체계 구성장치의 연결성 제어 및 자율 재구성을 위한 플러그앤플레이 프레임워크
장혜민,강석종,조영걸,윤주홍,윤지혁 한국군사과학기술학회 2021 한국군사과학기술학회지 Vol.24 No.3
A study on common modular design based on open standards to reduce the life cycle cost of ground weapon system is underway. Since the ground weapon system includes major mission equipment such as fire control system, it is essential to apply the concept of fault tolerance through automatic reconfiguration and blocking unspecified equipment through connectivity control. However, it is difficult to generalize due to the difference in operating characteristics for each system. In this paper, we propose a plug-and-play framework, which includes plug-and-play architecture and mechanism. The proposed method can be used in common by the application of each component as it is divided into a common service layer. In addition, the proposed connectivity control and autonomous reconfiguration method facilitates reflection of operating characteristics for each system. We constructed a verification environment that can simulate ground weapon systems and components, and verified that the proposed framework works through scenario-based functional tests.
건물형 전통시장의 평면과 내부배치 유형에 따른 피난 안전성 평가
장혜민,배영훈,손종영,홍원화,황정하 한국생활환경학회 2019 한국생활환경학회지 Vol.26 No.3
This study proposes user density [m2/person]requiredforperformance-based fire protection design of traditional markets by market size according to floating population through business district analysis. Furthermore, the floor plans and internal layouts of building-type traditional markets are analyzed and categorized into four floor plans and three internal layouts. The simulation input values are derived according to the floor plan and internal layout types, and fire and evacuation simulations are performed. The simulation results show that evacuation safety of the building-type traditional markets cannot be achieved because the required safe egress time (RSET) exceeds the available safe egress time (ASET). Thus, alternative solutions are presented by the size of traditional market. The evacuation safety can be secured by installing fire shutters and increasing the corridor width near the stairs for small and medium markets. For medium-large and large markets consisting of 3-story or high buildings, the evacuation safety can be secured by increasing the external stairs and corridor width. Thus, the standards for corridor width and fire shutters for preventing bottleneck phenomenon near the stairs by market size must be strengthened to secure the safety of users in the event of fires.
건물형 전통시장 화재발생시 피난안전성 확보를 위한 규모별 주요구조부내화보강 연구
장혜민,황정하 한국화재소방학회 2020 한국화재소방학회논문지 Vol.34 No.4
This study evaluates the safety of an asylum through a fire simulation of building Type traditional markets. We derivethe building’s indoor temperature, use the observed variation in temperature gradient to calculate the temperature of themain structure, and finally compares the time required to attain the limit temperature of the structure its time of escape. To ensure improved security of the asylum, the government has proposed a fire-resistance improvement plan for the majorstructural parts of buildings are not safe with thickness of 0.01 m and 0.035 m. F.ire-resistance reinforcement for small- and medium-sized vehicles is more than 0.025 m, in thickness; moreover safety can be ensured for medium andlarge-sized vehicles fire using fire resistant reinforcement of over 0.035 m. Accordingly, in order to ensure the safety ofan asylum, fire-resistant reinforcement measures may be considered. 본 연구는 건물형 전통시장의 화재 시뮬레이션을 통해 실내온도를 도출하여 온도구배를 이용하여 주요구조부의온도를 산출하여 구조체 한계온도에 도달하는 시간과, 피난 시뮬레이션을 이용하여 도출 된 피난완료시간을 비교하여 피난안전성을 평가하였다. 피난안전성이 확보되지 않는 건축물의 주요구조부재에 내화보강을 0.01~0.035 m 두께로 실시하는 것을 개선안으로 제시하여 피난안전성을 확보하고자 하였다. 소형과 중형은 내화보강이 0.025 m 이상일때, 중대형과 대형은 0.035 m 이상 보강시 안전성이 확보되는 것으로 나타났다. 이에 피난안전성의 확보하기 위해선내화 보강이 적용되어야 할 것으로 판단된다.