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김형탁(Hyung-Tak Kim),정희성(Hui-Seong Jeong),방광현(Kwang-Hyun Bang) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.4
Cooling performance of high-luminance LED lighting for marine application has been evaluated and an improvement of heat dissipation capability has been studied by applying the concept of pulsating heat pipe. The cooling performance test of an enclosure-type 160 W LED lighting shows that the largest thermal resistance occurs on the enclosure cover. The pulsating heat pipe can be one of the ways to significantly reduce the thermal resistance of LED lighting. An experimental study has been carried out to understand the operational fundamentals of pulsating heat pipe.
정밀안전진단 결과를 활용한 NATM터널(무근)의 라이닝 균열 종류별 발생원인 및 분석 - Part I
추진호,박성우,김형탁,지기환,윤태국,Choo, Jin-Ho,Park, Sung-Woo,Kim, Hyung-Tak,Jee, Kee-Hwan,Yoon, Tae-Gook 한국터널지하공간학회 2011 한국터널지하공간학회논문집 Vol.13 No.3
A crack is the main cause to affect the integrity of tunnel lining as well as leakage, spalling, exposed rebar, corrosion, carbonation and so on. Since the 1980, NATM has prevailed on excavation method and geotechnical philosophy in tunnel. Although the pattern of cracks has been reported by several engineers' effort, it was only focused on longitudinal cracks of lining. Eleven operational NATM tunnels have been conducted with the precise inspection for safety and diagnosis by KISTEC (Korea Infrastructure Safety and Technology Incorporation). With those results, the crack patterns by the spatial distribution and appearance for each tunnel have been analyzed and the cause of occurrence for seven common types of cracks in NATM tunnels was classified. Additionally, the longitudinal crack on lining above duct slab was figured out by numerical simulation and field inspection. Each crack has been analyzed by CCD (Charge-Coupled Device) scanner image with 3D configuration. Each type of cracks is also explained with output of experimental and condition of construction. Defined cracks on NATM tunnels will be good example for periodical inspection and precise inspection for safety and diagnosis. 균열, 누수, 박락, 철근노출, 부식, 탄산화 등은 터널 라이닝 건전도 평가항목으로 그 중에서 균열은 주요한 영향요인이다. 1980년 이후로, NATM은 터널의 굴착방법과 링폐합의 지반공학적 개념의 보급과 함께 넓게 적용되었으며, 라이닝에 발생된 균열의 연구도 진행되었으나 종균열에 제한된 연구가 주로 수행되었다. 본 논문에서는 11개의 공용중인 NATM터널의 정밀안전진단 결과를 활용하여 공간적인 위치 및 형태별로 분석하여 터널별 공통된 7개의 균열을 정의, 원인 및 분석, 사례 등을 나타내었다. 종류별 균열은 CCD스캐너 이미지를 3차원으로 분석하여 향후 NATM터널 정기점검 및 정밀안전진단 시 유익한 사례가 휠 수 있도록 하였다.
농협 상설매장을 통한 농산물 직거래 활성화 방안에 관한 연구
박철(Cheol Park),김형탁(Hyung-Tak Kim) 한국유통학회 2000 流通硏究 Vol.5 No.2
본 연구는 농산물 직거래에서 큰 비중을 차지하는 농협 상설매장에 대한 소비자의 이용실태와 평가에 대해서 분석해 보고, 농협 상설매장의 활성화 방안을 모색해 보고자 하였다. 농협 상설매장을 이용하는 소비자 257명을 대상으로 설문조사를 실시한 결과 하나로마트는 근린 생식품 매장으로, 하나로클럽은 농산물 및 식품류 할인매장으로 고객들에게 인식되고 있었다. 전반적으로 도시의 소비자들은 거리가 가깝거나 농협이라는 이름이 주는 신뢰성 때문에 농협의 상설매장을 이용할 의사는 높은 편이었다. 농협 상설매장이 믿을 수 있는 농산물의 전문소매점으로서 확실히 자리잡을 수 있다면 경쟁력 있는 농산물 직거래의 경로가 될 수 있을 것이다. 그러나, 조사의 결과에서도 드러났듯이 다론 소매점에 비해 투자가 적고 전문인력이 부족하여 농협매장에 대한 고객만족도는 그리 높지는 않았다. 매장 속성별로 매장의 소프트웨어적인 면(예: 판매원의 친절, 영업시간, 점포의 명성 등)에서는 고객들이 만족하고 있지만 하드웨어적인 면(예: 주차, 편의/부대시설, 셔틀버스 등)에서는 상대적으로 고객만족도가 낮거나, 타 점포와의 비교 우위도가 낮은 것으로 나타났다. 농협에서 이왕 소매사업에 뛰어들었다면 농협 상설매장의 활성화를 위해 많은 노력이 필요할 것으로 보인다. 본 연구에서는 농협 상설매장 활성화를 위한 전략적 시사점과 개선방안을 제시하였고, 연구의 한계와 향후 연구방향을 끝으로 제시하였다. In order to improve the agricultural products distribution, many devices have been suggested. Recently, direct marketing channel of agricultural product is one of the best solution for the problems of agricultural product distribution. The largest farmers cooperative association in Korea, Agricultural Cooperative(AC) have tried to promote direct marketing channel of agricultural product. Especially, the Agricultural product outlet store owned by Agricultural Cooperative(AC) is developed as an attractive alternative. Agricultural product outlet store owned by AC classify two types; small & medium sized supermarket style and large discount store style. In this study, direct marketing through the agricultural product outlet store owned by AC was examined because it leads direct agricultural distribution and shares over 70% of direct agricultural distribution in Korea. Though a survey about consumer perception & evaluation on establishing agricultural product outlet store owned by AC in Busan, the success factor of the store were identified. The results indicate that price, kindness of sales people, quality of products are main factor of the agricultural products outlet store. Theorefore Agricultural Cooperative should develop the retailing & marketing strategies focusing these findings.
지하구조물의 철근부식 평가에 대한 개정 세부지침(터널)의 적용방안
추진호 ( Choo Jin-ho ),장경진 ( Jang Kyung-jin ),김홍균 ( Kim Hong-kyoon ),김형탁 ( Kim Hyung-tak ),윤태국 ( Yoon Tae-gook ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.2
According to the revised guideline(tunnel) in 2009, the corrosion factor for deterioration of reinforced underground structures is changed. Two on-site measurements are arranged and evaluated for the possible application. It is promising method 2D-contour map by half-cell as well as the polarization resistance and galvanostatic/potentiostatic pulse transient response for better application of assessing corrosion condition in revised detail guideline.
조용현 ( Yong Hyun Cho ),신광일 ( Kwang Il Shin ),김선희 ( Sun Hee Kim ),이동현 ( Dong Hyun Lee ),김형탁 ( Hyung Tak Kim ),김상인 ( Sang In Kim ),전석호 ( Seok Ho Jun ),이현석 ( Hyun Seok Lee ) 경희대학교 경희의료원 2018 慶熙醫學 Vol.33 No.1
Caudal block is one of the good options for the management of lumbar and sacral pain control. Caudal epidural injection is believed as safe and simple procedure so frequently performed in outpatient departments with blind technique. We experienced transient mental change after caudal block injection with blind technique using local anesthetics. And the patient was recovered without any adverse effect. We report our case experience with brief review of the relevant literature.
조용현 ( Yong Hyun Cho ),신광일 ( Kwang Il Shin ),김선희 ( Sun Hee Kim ),이동현 ( Dong Hyun Lee ),김형탁 ( Hyung Tak Kim ),김상인 ( Sang In Kim ),전석호 ( Seok Ho Jeon ),이현석 ( Hyun Seok Lee ) 경희대학교 경희의료원 2018 慶熙醫學 Vol.33 No.1
In this case report, we aimed to report a total spinal block, an unusual complication. Total spinal anesthesia is a well documented serious life threatening complication which results from an attempted spinal or epidural analgesia. We had an accidental total spinal anesthesia associated with a cranial nerve paralysis and an eventual unconsciousness during spinal block. We experienced successful recovery from anesthesia without any adverse effect. We report our clinical experience, including brief review of the relevant literature.
지하구조물의 철근부식 평가에 대한 개정 세부지침(터널)의 적용방안
추진호(Choo, Jin-Ho),장경진(Jang,Kyung-Jin),김홍균(Kim, Hong-Kyoon),김형탁(Kim, Hyung-Tak),윤태국(Yoon, Tae-Gook) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.2
According to the revised guideline(tunnel) in 2009, the corrosion factor for deterioration of reinforced underground structures is changed. Two on-site measurements are arranged and evaluated for the possible application. It is promising method 2D-contour map by half-cell as well as the polarization resistance and galvanostatic/potentiostatic pulse transient response for better application of assessing corrosion condition in revised detail guideline.