콘크리트에 표면매입 보강된 FRP판의 전단키 및 연단거리 효과

서수연 한국구조물진단유지관리공학회 2016 한국구조물진단유지관리공학회 논문집 Vol.20 No.1

본 연구에서는 콘크리트에 표면매입된 FRP판의 부착거동에서, 전단키와 연단거리의 효과를 관찰하기 위한 부착시험을 실시하였 다. 실험에서의 주요변수는 전단키의 위치, 형태 그리고 연단길이이다. 규격 3.6 ㎜×16 ㎜의 FRP를 400 ㎜×200(300) ㎜×400 ㎜ 규격의 콘크리 트 블록에 매입하고 에폭시로 고정시켜서 실험변수에 따라 총 10개의 부착실험체를 제작하였다. FRP의 연단에 인장력을 가한 뒤 파괴시까지 실험을 실시하고 하중을 기록하였으며, 미끄러짐과 FRP의 인장변형량을 기록하였다. 실험으로부터, 전단키의 위치는 가력부에서 멀리 떨어 질수록 전단강도가 상승하는 것으로 나타났으며, 전단키의 직경이 커질수록 내력이 저하되는 것으로 나타났다. 특히 전단키가 일정 이상의 규 격이 되면 전단키가 없는 경우에 비하여 내력이 저하되어 오히려 부착강도에 부정적인 영향을 미칠 수 있는 것으로 나타났다. NSM FRP에서 응력장용방향의 연단거리가 길어짐에 따라 동일 부착길이임에도 불구하고 내력이 일부 증가하는 것으로 나타났다. 표면매입 보강된 FRP의 부착실험에서, FRP와 콘크리트사이의 부착-미끄러짐은 전체거동을 지배하는 것으로 나타나므로 이에 따른 과도한 미끄러짐은 설계에 반드시 고려될 필요가 있다. This paper presents a bond test to find the effect of shear key and edge length from the bonded FRP in near surface-mounted(NSM) retrofit using FRP plate. Main parameters in the test are the location and size of shear key and the edge length. For the test, 10 specimens were made by embedding FRP plate of 3.6 ㎜×16 ㎜ into 400 ㎜×200(300) ㎜×400 ㎜ concrete block and fixing it by using epoxy. Tensile load was applied to the FRP of the specimens until failure and was recorded at each load increase. In addition, the bond slip and elongation of FRP were measured during the test. From the test, it was found that the further the shear key located from the loading, the higher strength we could get. The bond strength inversely depended on the size of shear key. Especially, when the size of shear key was to be lagger than certain size, the bond strength decreased to very low value; even less than that of the case without shear key. The bond strength somewhat increased corresponding to the increase of edge length from the bonded end of FRP to loading in spite of same bond length. The bond-slip between FRP and concrete governed overall deformation in the bond test of NSM FRP so that the effect of excessive slip is necessary to be considered in the design.

Validation of the Korean Depressive Symptom Inventory-Suicidality Subscale

서수연,류혜라,Carol Chu,Melanie Hom,Megan L. Rogers,Thomas Joiner 대한신경정신의학회 2017 PSYCHIATRY INVESTIGATION Vol.14 No.5

Objective: The present study aimed to validate a Korean version of the self-report Depressive Symptom Inventory-Suicidality Subscale (DSI-SS). Methods: 553 South Korean undergraduate students (aged 18–34 years, 74.8% females) completed questionnaires. Participants completed Korean versions of the self-report Depressive Symptom Inventory-Suicidality Subscale (DSI-SS), Beck Depression Inventory-II (BDI-II), Insomnia Severity Index (ISI), Beck Scale for Suicide Ideation (BSS), and a measure of suicide-related symptom history. Results: Results indicated that the DSI-SS demonstrated excellent internal consistency (α=0.93) and strong convergent validity with the BDI (r=0.57, p<0.01), ISI (r=0.27, p<0.01), and BSS (r=0.70, p<0.01). DSI-SS scores also significantly differentiated between those reporting a history of suicide attempts compared to non-suicide attempters [t (38.80)=-3.28, p<0.05]. Conclusion: Given the brevity of this measure, and evidence for its validity, the Korean version of the DSI-SS may be particularly promising for clinical and empirical use as a screening tool among South Korean undergraduates.

재활로봇에 대한 작업치료사의 인식 조사

서수연,김시은 대한고령친화산업학회 2019 대한고령친화산업학회지 Vol.11 No.1

Objective : In the present study, the demand for rehabilitation robots is increasing, We will examine the recognition of rehabilitation robots. Method : From October 31 to November 9, 2018, 62 questionnaire surveys were conducted for occupational therapists in Busan and Kyungnam provinces, Respectively. A total of 100 questionnaires were distributed, and questionnaires collected via internet links and direct visits 62 parts. The collected data were analyzed using SPSS (Statistical Package for Social Science for Window) Technical statistical analysis was performed using Version 21.0. Result : I have heard of questions about whether you know or have heard of rehabilitation robots 41 persons (66.1%) responded to the questionnaire, and the rehabilitation robots that they knew were hand function training The highest rate of exercise rehabilitation was 53 persons (85.7%) and the need for rehabilitation robot 32 persons (51.6%) answered yes to the questionnaire, and patients were given appropriate and high quality intervention To provide "was the highest rate of 27 persons (43.9%). Conclusion : Recognition of rehabilitation robots by occupational therapists is low, but the need for rehabilitation robots It is necessary to provide facilities and rehabilitation robot program and education to provide rehabilitation robot service. In order to activate the rehabilitation robot systematically in the future. 목적 : 본 연구는 재활로봇에 대한 국내외의 수요가 높아지는 현시점에서 국내 작업치료사들의 재활로봇에 대한 인식도를 조사해보고자 한다. 연구방법 : 2018년 10월 31일부터 11월 9일까지 부산, 경남 지역 작업치료사 대상으로 설문조사를 실시하였 다. 배부된 설문지는 총 100부였으며, 인터넷 링크와 직접 방문으로 회수된 설문지는 62부였다. 수 집된 자료는 통계 프로그램인 SPSS(Statistical Package for Social Science for Window) Version 21.0을 사용하여 기술 통계분석을 실시하였다. 연구결과 : 재활로봇에 대해 알고 있거나 들어본 적이 있는지에 관한 문항에서 들어본 경험은 있다고 응답한 대상자가 41명(66.1%)으로 가장 많았으며, 알고 있는 재활로봇으로는 손 기능 훈련 등의 운동재활 분야가 53명(85.7%)로 가장 높았으며 재활로봇에 의한 치료 프로그램이 필요한지에 한 항목에서는 그렇다고 응답한 대상자가 32명(51.6%)이였고 필요한 이유에 대한 응답으로는 “환자들에게 적절하 고 질 높은 중재를 제공하기 위해” 라는 응답의 비율이 27명(43.9%)로 가장 높았다. 결론 : 작업치료사들의 재활로봇에 대한 인식도와 요구도가 높게 나와 지역별로 재활로봇과 관련된 시설과 재활로봇 프로그램 및 교육이 마련되어 재활로봇 서비스를 제공해야 할 필요가 있다는 것을 알 수 있다. 향후 체계적으로 재활로봇의 활성화를 위해서 지속적인 협회 차원의 보수교육 및 워크숍 등 의 교육 기회 제공 및 제정적인 지원이 마련되어야 할 것이다.

A mechanical acupuncture instrument mitigates the endoplasmic reticulum stress and oxidative stress of ovariectomized rats

서수연,Suk Yun Kang,권오상,Se kyun Bang,Soo Phil Kim,Kwang-Ho Choi,Ji Young Moon,Yeonhee Ryu 한국한의학연구원 2019 Integrative Medicine Research Vol.8 No.3

Background: Acupuncture has become a common complementary and alternative treatment approach for anxiety and depression. However, there is little research on the detailed mechanism of acupuncture therapy relieving depression. Previously, 17β-estradiol (E2) was shown to prevent oxidative stress and endoplasmic reticulum (ER) stress in ovariectomized (OVX) rats. This study investigated whether stimulation of Sanyinjiao (SP6) using a mechanical acupuncture instrument can alleviate depression-like behavior caused by estrogen deficiency in OVX rats. Furthermore, we found that acupuncture reduced ER stress and oxidative stress-related proteins expression. Methods: The OVX operation was performed on female SD rats that were separated into four groups: The E2 (2.5 μg/kg, i.p.) injection group (OVX + E2), the OVX group (OVX), and the OVX with acupuncture stimulation group (OVX + SP6). Non-acupoint stimulation group (OVX + NonAcu). The acupuncture point stimulation began three weeks after surgery. The depressive behavior was analyzed by the forced swim test and open field test. The 8-OHDG, BiP, Sigma receptor 1, pJNK, PDI, Ero1-Iα and Calnexin protein levels were evaluated by immunoreactivity in the amygdala. Results: Acupuncture stimulation reduced depressive behavior and altered depression-related proteins. Stimulation of SP6 decreased the immobility time of the FST and altered the ER stress and oxidative stress marker proteins, such as 8-OHDG, BiP, pJNK, PDI, Ero1-Ia and Calnexin. Conclusion: Our results indicated that acupuncture at SP6 showed a significant antidepressant-like effect on an OVX-induced depression rat model by mitigation of ER stress and oxidative stress in amygdala.

특수전단벽 연결보의 대체상세 실용화 연구

서수연 한국콘크리트학회 2014 한국콘크리트학회 학술대회 논문집 Vol.2014 No.10

콘크리트내에 매립된 철근의 고온 노출에 따른 부착거동 해석

서수연 청운대학교 건설환경연구소 2015 청운대학교 건설환경연구소 논문집 Vol.10 No.2

In this paper, a thermal analysis for concrete structure by using ADINA program was performed and the result was compared to a rebar pull-out test. In addition, the bond capacity of rebar embedded in concrete was investigated corresponding to the surrounding temperature in the finite element analysis As a result, the thermal structural analysis on the basis of the finite element analysis program showed similar results as those set forth in previous studies, which should made the analysis valid and property changes of the concrete block were identified under both thermal and structural load. The bond strength rapidly decreased when the surrounding temperature was beyond 600℃. 본 연구에서는 ADINA 프로그램을 이용하여 콘크리트 구조의 열해석을 실시하고 그 결과를 철근 인발시험결과와 비교하였다. 또한 유한요소해석을 수행함에 있어서, 주변 온도에 따른 콘크리트내에 매립된 철근의 부착 성능변화를 연구하였다. 연구결과로서, 온도하중을 받는 상태에서 유한요소 프로그램을 이용하여 구조해석을 실시한 결과가 기존의 실험연구를 유사하게 묘사하는 것으로 나타났다. 온도하중이 600℃를 초과할 경우에는 부착강도가 급격히 저하되는 것으로 나타났다.

페인트, 접착제, 실란트에서 방출되는 휘발성유기화합물 특성연구

서수연,장성기,임준호,이우석 한국대기환경학회 2008 한국대기환경학회 학술대회논문집 Vol.- No.-

철근 콘크리트 골조 구조의 구조 실험에 관한 허용 기준

서수연,이리형 한국콘크리트학회 2001 콘크리트학회지 Vol.13 No.1

반복하중을 받는 철근콘크리트 골조 Knee Joint의 이력특성에 관한 연구

서수연 忠州大學校 2005 한국교통대학교 논문집 Vol.40 No.2

In the beam-column joint or its adjoining parts, the plastic hinges may be formed due to the repeated stress concentrated on the connection between vertical and horizontal members under cyclic loading as earthquake load. Also these control overall behavior of structure so that the joint design is one of most important parts. Most studies the connection have focused on the lowest floor beam-column joints since the first plastic hinge is developed adjacent to connection of lower floor . In the top floor, the uses of larger diameter reinforcing bars is often prevented due to the geometric limitations such as the difficulties of fabrication, construction, and concrete placement. In additionm, hooks of reinforcing bar can lead to develope local failure and slip due to weak anchorage capacity caused by congestion of rein forements. With the increasing tendency for construction of high-rise reinforced concrete buildings, it is required to use high-strength materials, smaller member sections and larger reinforcing bars; therefore, steel arrangement in the beam-column joint expect to be more congested. The purpose of this experimental study is to investigate hysteretic behavior of the top floor corner joint with various arrangement details.

한국 드라마의 몸짓언어가 음성해설(화면해설)로 번역되는 양상과 실무에의 함의 고찰

서수연,이상빈 한국통역번역학회 2021 통역과 번역 Vol.23 No.3

Body language is one of the non-verbal components of human social behavior. It is a crucial part of how we communicate and what we deliver in social interactions. In communicative situations involving audio description (AD), too, body language is significant in that it provides (con/co)textual information that helps the AD user better understand the unfolding event. However, the timing constraints contingent on AD make it difficult to insert a commentary describing body language. This study aims to reveal strategies for audio-describing body language in television dramas and to discuss what implications the findings have for AD practice. For this purpose, five Korean TV dramas with ADs were analyzed both quantitatively and qualitatively. A total of 111 instances of body language use were identified and categorized according to an expanded version of Mazur’s (2014) typology ― “literalness,” “explicitation,” “generalization,” “omission,” “interpretation,” and “combination of strategies.” The findings show that literalness and combination of strategies are most pronounced in the data set and that, in the combination of strategies, explicitation is the most frequently used strategy. The study concludes with a brief discussion of implications and limitations.