붕괴방지수준(CLE)을 적용한 콘크리트 댐 피어부 내진성능평가 방안 개선

오정근,정영석,권민호 한국구조물진단유지관리공학회 2024 한국구조물진단유지관리공학회 논문집 Vol.28 No.1

이 논문의 목적은 붕괴방지수준의 지진력을 적용한 콘크리트 댐 피어부 동적해석 시 합리적인 댐 축방향 지진하중 재하 방법, 내하력 평가 방법 등에 대한 적용방안을 제시하는 것이다. 이를 위하여 콘크리트 댐 피어부를 대상 시설로 선정하여 다양한 위어부 폭을 적용한 동적해석을 통해 위어부 댐 축방향 동적거동 특성을 분석하고 ‘U.S. Army Corps, 2007’제시하는 RC수력구조물 평가기법을 적용하여 내하력 평가를 수행하였다. 연구결과 피어부 댐 축방향 지진력 적용 시 위어부 댐 축방향은 강체거동으로 가정하는 것이 보다 현실적이고 ‘U.S. Army Corps, 2007’에서 제시하는 모멘트와 전단에 대한 내하력 검토방법이 합리적인 것으로 판단되므로 현행 평가방법의 개선이 필요한 것으로 결과가 도출되었다. 연구 결과 개선사항을 적용할 경우 CLE를 적용한 현행 내진성능평가 방법보다 합리적인 평가결과를 도출하는 효과가 있을것이다. 피어부에 발생하는 비틀림 모멘트에 대해서는 향후 추가적인 연구가 필요한 것으로 판단된다. The purpose of this paper is to suggest a method for applying a reasonable dam axial seismic load loading method and load-bearing capacity evaluation method in the dynamic analysis of the pier part of a concrete dam to which the seismic force of the collapse prevention level is applied. To this end, the pier part of a concrete dam was selected as a target facility, and the characteristics of the dynamic behavior in the axial direction of the weir dam were analyzed through dynamic analysis applying various weir widths, and ‘U.S. The load-bearing capacity evaluation was performed by applying the RC hydraulic structure evaluation technique suggested by the Army Corps, 2007'. As a result of the study, when applying seismic force in the axial direction of the pier part, it is more realistic to assume that the axial direction of the weir part dam behaves as a rigid body and ‘U.S. Army Corps, 2007' suggested that the method of reviewing the load-bearing capacity for moment and shear was considered reasonable, so it was concluded that improvement of the current evaluation method was necessary. If the improvement of the research result is applied, it will have the effect of deriving more reasonable evaluation results than the current seismic performance evaluation method using CLE. It is judged that additional research is needed in the future on the torsional moment occurring in the pier part.

모체열충격이 Hsp70 KO 생쥐의 입천장 중간엽 발생에 미치는 영향

오정근,김원규 대한체질인류학회 2005 해부·생물인류학 (Anat Biol Anthropol) Vol.18 No.2

To investigate the effects of maternal hyperthermia on the development of the palate, pregnant Hsp70 knock-out mice at gestational day (GD) 8.5 were immersed in 43C water bath until their body core temperature reached at 43C. Thereafter, pregnant mice were given more 5 minutes hyperthermic exposure. Heat-untreated Hsp70 WT mice fetuses were used as the control group. Fetuses were collected at embryonic day 13.5, 14.5 and 15.5 (E13.5, E14,5 and E15.5). Heads followed by removal of the mandible and the tongue were obtained and photographed for palatal development. Developing palates were processed for histological and immunohistochemical studies. Tissue sections were immunostained for TGF-β2, FGF-8 and fibronectin, and observed with light microscope. The obtained results were as follows: Cleft palate was formed in heat-treated Hsp70 KO fetuses at E14.5 and E15.5. Immunohistochemical findings indicated that TGF-β2 expression of the experimental fetuses were more delayed than that of the control fetuses. Mesenchyme under the medial edge epithelium (MEE) and cells of MEE showed continuously strong positive TGF-β2 reactivity at E15.5. FGF-8 was revealed in both of the mesenchyme and the epithelium at the same time. FGF-8 immunoreactivity in the mesenchyme and the epithelium of the heat-treated fetuses showed strong reactivity at E15.5. In the experimental fetuses fibronectin was revealed the mesenchyma and basal lamina at E15.5. Taken together, it is suggested that maternal hyperthermia induces continuous expression of TGF-β2 and FGF-8 in the mesenchyme and delayed expression of fibronectin. These should affect the normal palatogenesis and result in cleft palate. 모체의 고열은 실험동물 및 사람에서 중추신경계를 포함한 다양한 형태의 선천성기형을 유발하는 것으로 알려져 있고 입천장갈림증을 유발한다는 여러 실험 및 임상보고가 있다. 그러나 그 기전에 대해 명확히 밝혀진것은 부족하다. 또한 세포가 고열에 노출되면 방어기전으로 열충격단백질을 합성, 분비한다. Hsp70은 열충격단백질의 한 종류로서 정자발생과 같은 정상발생과정뿐만 아니라 고열과 같은 스트레스에 의한 세포자멸사를 억제하는 기능을 갖는 것으로 알려져 있다. 이에 본 연구에서는 유전자 조작법으로 Hsp70이 결손된 임신한 생쥐를 고열에 노출한 후 입천장돌기 중간엽의 세포바깥바탕질에서 발현되는 fibronectin, TGF-β2 및 FGF-8 면역조직화학염색을 시행하여 모체 고열에 의한 발현양상의 변화를 관찰하고자 하였다. 실험군으로는 고열에 노출된 Hsp70 KO 생쥐 태아를, 대조군으로 고열에 노출되지 않은 Hsp70 WT 생쥐 태아를 사용하였다. 실험군은 임신 제 8.5일에 43C 수조에서 5분간 열충격을 주었고, 대조군에는 아무런 조작도 가하지 않았다. 임신 제 13.5, 14.5 및 15.5일에 모체를 희생하여 자궁내의 태아를 적출한 후 머리를 절취하였다. 일부 표본은 아래턱과 혀를 제거한 후 외형관찰을 하였으며, 나머지 표본은 면역조직화학염색을 시행하였다. 실험군 태아에서는 입천장갈림증이 형성되어 있었다. 면역조직화학염색소견상 실험군의 경우 TGF-β2는 대조군에 비하여 발현이 지연되었고, 태령 제 15.5일에서는 내첨단부 하방의 중간엽에서 강한 반응을 보였으며 내첨단부 상피세포에서 양성반응을 지속적으로 보였다. FGF-8은 중간엽과 상피에서 반응을 나타내었으며, 태령 제 15.5일에서 실험군은 중간엽세포와 상피세포에서 강한 양성반응을 나타내었다. Fibronectin은 태령 제 15.5일 실험군에서 중간엽전반에 걸쳐 강한 양성반응을 보였으며, 바닥막을 따라 강하게 반응을 보였다. 이상의 결과를 종합하면 모체고열은 입천장돌기 중간엽에서 TGF-β2 및 FGF-8의 지속적인 발현과 fibronectin의 지연발현을 유발하여 입천장의 정상적인 발생과정에 영향을 미쳐 입천장갈림증을 유발하는 것으로 생각된다.

TV 드라마 속성, 촬영장소 속성, PPL효과와 관광행동과의 관계

오정근,허양례 한국호텔관광학회 2011 호텔관광연구 Vol.13 No.4

This study tried to verify a causal relationship and effects that TV drama’ and location’ attributes have on the inducement of tourists through product placement(PPL) Effect. The result of the study will indicate that drama attributes, such as popularity of actors, together with their acting abilities and direction, have positive effects on location attributes and product placement effects. location’ attributes such as suitability of place, recognition of place, recollection of place have positive effects on product placement effects. Product placement effects have also positive effects on tourist behavior such as intentions to visit and recommend the desired locations. Finally, location of TV drama as a means of marketing for tourist areas and tourism enterprises have positive effects on decision making of destinations. Central and local government can make good use of TV drama’ and location’ attributes as a strategic means of place marketing.

The Contribution of Sculpture and Public Art to the Visitor Experience: A Case Study of Wellington in New Zealand

오정근,Trisha Dwyer 한국호텔관광학회 2011 호텔관광연구 Vol.13 No.3

This exploratory research aims to identify the ways in which sculpture and public art contribute to the visitor experience of Wellington, New Zealand. An intercept questionnaire-based survey was conducted of visitors displaying an interest and both quantitative and qualitative data analysis was carried out. The relationship between public art in Wellington and civic identity and destination image branding, urban and cultural tourism was also explored. The visitors surveyed were strongly in favour of public art and found the sculptures in Wellington to be interesting although not necessarily representative of the city. According to the research, public art makes a positive contribution to the visitor experience of Wellington and reinforces the identity of art city and cultural capital.

Korean Tour Leaders’ Perception of Work Stressors and Work Stress’ Effects

오정근,유은수 한양대학교 관광연구소 2010 觀光硏究論叢 Vol.22 No.2

This study concerns Korean Tour Leaders’ stressors during Korean Group Package Tour (GPT) and to what extent they feel stress and are affected by the stressors while they conduct GPT. In order to ascertain Korean Tour Leader’ work stressors and their effects, the authors used FGI (Focus Group Interview) and In-depth Interviews. The primary factors of work stressors are found as the emotional labour in a tour leader, the overburdened role of a tour leader, the influence of Confucianism in Korea, and competitive organisational culture as a work stressor. Regarding work stress’ effects, there are effective aspects such as job stress’ effects to emotional exhaustion, role conflict and physical aspects such as physical disorders and health problems. Particularly in Korean GPT, the organisational culture of travel agencies and tourists’ perceptions on the tour leaders influenced by Confucianism were analysed as the most powerful effect components.

중저가 관광숙박시설로서 게스트하우스에 대해 어떻게 인식하는가? -게스트하우스 운영자 인식과 Q방법론적 유형화를 중심으로-

오정근 한국관광학회 2019 관광학연구 Vol.43 No.1

본 연구에서는 게스트하우스 운영자들이 게스트하우스에 대해 어떻게 인식하고 있는지에 대해 Q방법론을 적용해 인식을 분석하고 유형화하였다. 37명의 게스트하우스 운영자(소유주, 매니저)를 대상으로 Q 연구 조사한 결과, 여행편의성 숙박시설 인식형, 경제활성화 숙박시설 인식형, 소통 및 정보공유공간 인식형, 법적규제와 육성의 대체 숙박시설 인식형 등 총 4개의 유형으로 분류되었다. 제1유형 ‘여행 편의성 숙박시설 인식형’은 게스트하우스를 여행의 편의공간으로 인식하고 있었으며, 제2유형 ‘경제활성화 숙박시설 인식형’은 게스트하우스를 국가 및 지역 활성화에 기여하며 부가가치를 창출하는 수단으로 인식하고 있었다. 제3유형 ‘소통 및 정보공유공간 인식형’은 게스트하우스를 다양한 여행객들 및 지역주민들과 만나며 교류하는 소통공간으로 인식하고 있었고 제4유형 ‘법적규제와 육성의 대체 숙박시설 인식형’은 게스트하우스의 불법업체가 많은 상황에서 법적규제 강화와 대체숙박시설로 육성 지원의 필요성을 인식하고 있었다. 연구결과에 따라, 학제적 관점에서 게스트하우스를 포함한 중저가 숙박시설의 세분화된 연구, 법제적 관점에서 불법업체 강력규제와 사업자의 문턱 완화, 정책적 관점에서 금융지원 확대와 게스트하우스 밀집지역 중심의 관광 클러스터 조성 등을 제언 및 시사점으로 제시하였다. This study was to form a typology after analyzing how guesthouse operators perceive guesthouses by using Q methodology. The results of Q analyses showed that 37 operators perceived four types: accommodations for travel convenience, accommodations to revive the economy, space for communication and information sharing, and alternative accommodations of legal regulation and fostering. Type 1, accommodations for travel convenience, means that they perceived guesthouses as a convenient space for travelling. Type 2, accommodations to revive the economy, means that they perceived guesthouses as a measure for national and regional economic revival and a way to create added value. Type 3, space for communication and information sharing, means that they perceived guesthouses as communication space for cultural exchange among travelers and local residents. Type 4, alternative accommodations of legal regulation and fostering, means that they perceived guesthouses as alternative accommodations that strengthen legal regulations and both foster and support. According to the results, academic, legislative, and political suggestions and implications were found, such as detailed research on medium-low priced accommodation, strong regulation of illegal guesthouses and relaxed regulations on business operators, expanding financial support, and creating tourist clusters based on guesthouses.

지방시대

오정근 한국지역개발학회 2022 한국지역개발학회 학술대회 Vol.2022 No.11

축제의 체험속성과 환경단서가 방문객 만족에 미치는 영향: 체험형축제와 관람형축제의 비교분석을 중심으로

오정근 한국관광학회 2008 관광학연구 Vol.32 No.4

This study was to identify the causal relationship between experiential festival attributes, festival environmental cues and the visitors' satisfaction based on 2007 Boryeong Mud Festival as experiential festival and 2007 Gwacheon Hanmadang Festival as watching festival. Especially, author focused on comparative analysis between experiential festival and spectating festival. According to factor analysis and multiple regression analysis, experiential festival attributes was found divided into various parts, most of which exerted positive causal relationship on visitors' satisfaction. Also variables such as creativeness/nature among experiential festival attributes and transportation/guide service, connection commodity among festival environmental cues in Gwacheon Hanmadang Festival were found exercising positive influences upon visitors' satisfaction.

고강도 철근콘크리트 춤이 큰 보의 전단스팬비 효과

오정근,성열영,안종문,이광수,신성우 한국콘크리트학회 1997 콘크리트학회지 Vol.9 No.5

콘크리트 압축강도 및 전단스팬비의 변화에 의한 고강도 철근콘크리트 춤이 큰 보의 전단거동 및 내력특성을 파악하기 위한 실험적 연구를 하였다. 춤이 큰 보는 하중작용점과 하중지지점을 연결하는 사균열의 확대에 의해 취성전단파괴양상을 나타내었으며 하중작용점 하중 지지점의 콘크리트 압괴를동반하는 전단압축 및 전단인장파괴 형태로 최종파괴되었다. 전단스팬비가 감소함에 따라 사균열전단응력 및 최대전단응력은 크게 증가하였으며, ACI 및 CIRIA규준식은 부재의 최대전단응력을 비교적 정확하게 예측하고 있음을 파악하였다.

지방 국제공항의 공항인프라와 관광환경이 방문자만족에 미치는 영향: 청주국제공항을 중심으로

오정근 한국호텔관광학회 2012 호텔관광연구 Vol.14 No.2

This study aims to analyze causal relationships among airport infra-structures, tourism environments around the airport and visitor’s satisfaction focused on Cheongju international airport. Especially, the author conducted to suggest survival strategies for the local international airport. According to findings of this study, factor analysis was classified into 3 factors(indoor facilities and services of airport, tourism attractions and facilities around airport, transportation for access to the airport). In the result of verification of hypotheses, indoor facilities and services of the airport, tourism attractions and facilities around airport, transportation for access to the airport have significantly positive impacts on its visitor’s satisfaction. The causal relationship between tourism attractions and facilities around the airport and its visitor’s satisfaction represents an important meaning because this relationship almost had not been carried on in the past studies. The contribution of this study is that the author explored distinctive ways toward developmental directions for the local airport through a systemic classification on characters and relationships between the local airport and tourism environments around it.