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초음파법을 이용한 콘크리트 시공이음부 공극 및 내부공동의 화상검출 해석에 관한 연구
박석균,백운찬,이한범 대전대학교 산업기술연구소 2000 산업기술연구소 論文集 Vol.11 No.2
The joint and void treatment of concrete is one of the technical problems in construction. Joints and voids created with the construction result in serious weakness from the aspects of both structural and water-barrier function. Ultrasonic image processing technique was used for the inspection of construction joints of SRC(Steel-frame Reinforced Concrete) column and voids of concrete block in this study. The advantages and limitations of this technique for non-destructive inspection in construction joints and voids are investigated. As a result, it has been verified that the semi-direct measurement type is more effective than the other types for detecting the construction joints and voids using ultrasonic method.
초음파법을 이용한 콘크리트 역타시공 이음부 공극의 화상검출특성
박석균,백운찬,이한범,김명모 한국비파괴검사학회 2000 한국비파괴검사학회지 Vol.20 No.4
최근 역타시공법 등에 의한 콘크리트 구조물의 시공이 증가 추세에 있다. 이 경우, 자주 발생되는 신ㆍ구타설 콘크리트 시공이음부의 공극은 향후 구조물의 구조적인 특성과 내구성 등에 큰 영향을 미치게 된다. 그러나 현재 제안되고 있는 비파괴 검사법으로는 효과적으로 이음부 공극을 평가하기에 많은 한계가 있다. 본 연구에서는 시공이음부의 콘크리트 충전상태를 평가하기 위해 철골철근 콘크리트와 무근 콘크리트 시험체내에 공극을 모의제작한 후, 초음파속도 측정을 실시하고, 화상처리기법을 이용하여 비교적 용이하게 해석 가능한 방법에 대해 검토하였다.
사회적 변화에 따라 정신질환자들의 피해망상 속에 나타난 박해자 유형변화
강승범,황인복,김한석,김승곤,김학렬,박상학,김상훈,황걸 朝鮮大學校 附設 醫學硏究所 2008 The Medical Journal of Chosun University Vol.33 No.3
Objective: The authors investigated the frequency of persecutors in persecutory delusions of the psychiatric patients who didn't undergo the arrest or traumatic injury, reside in Gwangju Jeonnam area, and were admitted to the hospital after the 5.18 prodemocracy movement in Gwangju in 1980 upward 10 years. Also this study investigated the frequency of the persecutors before and after the prodemocracy movement and in capital and Gwangju Jeonnam area. Subjects and Methods: Among the 896 patients who were admitted to department of psychiatry, Chosun University Hospital from Jan. 1. 1989 to Dec. 31. 1991, we choosed 144 patients with persecutory delusion who had lived in Gwangju Jeonnam area for 10 years after 5.18 prodemocracy movement as subjects. Persecutors were classified into 7 class: unspecified, family, neighbors, communist or spy, police or army or secret agent, impersonal, others. Results: 1) In our study, the frequency of persecutors was family, unspecified, neighbors, police or army or secret agent, impersonal, others, communist or spy in descending order. As compared to previous studies (1956-2003) including our study about frequency of persecutor at capital area and Gwangju Jeonnam area, and before and after 5.18 prodemocracy movement, 2) At capital area, in the early 1980s, police, family, neighbors, unspecified person was frequent in descending order. In the both of early 1970s, 1990s, neighbors, family, unspecified person, police was frequent in descending order. 3) At Gwangju Jeonnam area, in the early 1970s, family, unspecified person, neighbors, police was frequent in descending order. In the early 1990s, unspecified person and family, neighbors, police was frequent in descending order. 4) The police class was most frequent at capital area in the early 1980s. Conclusions: We suppose that class of persecutor in persecutory delusions of psychiatric patients are changing according to social change, and frequency of police class was decreasing in both of capital and Gwangju, Jeonnam area.
버섯의 갈변병 유발세균 P. tolaasii의 길항세균인 P. fluorescens의 분리 및 배지최적화
조남철,박범식,전억한 경희대학교 유전공학연구소 1991 遺傳工學論文集 Vol.3 No.-
버섯 갈변병 유발세균인 P. tolaasii에 길항성을 가진 P. fluorescens의 대량배양을 위하여 배지조성 및 배양의 최적조건을 확립하였다. 세포성장에 있어서 carbon 및 energy source인 glucose의 경우 30g/l일 때 세포농도가 가장 높았으며, yeast extract의 최적농도는 10g/l였다. 또한 균체의 구조합성에 있어 중요한 nitrogen source인 NH_(4)Cl과 (NH_(4))_(2)SO_(4)는 각각 1.0g/l와 0.1g/l일 때 세포성장이 가장 좋은 것으로 나타났고, sulfur source인 MgSO_(4)·7H_(2)O의 최적농도는 1.0g/l였다. 그리고 KH_(2)PO_(2)와 CaCl는 각각 1.0g/l와 0.1g/l일때 세포농도가 가장 좋았고, 온도 30℃, pH 6.0 그리고 초기 D.O가 68일 때 세포성장이 가장 높았으며, 균체 비증식속도(μ)와 생산성(P)도 높았다. P. fluorescens was studied in both batch and continuous culture in order to find out optimum conditions for cultivation. p. fluorescens is an aerobic bacteria and antagonistic to p. tolaasii which causes blotch disease on the mushroom cap. Cells of P. fluorescens were grown well on medium containing 30 g/ℓof glucose, whereas the growth was inhibited with the glucose concentration at higher than 30g/ℓ. The highest values of specific growth rate and productivities were obtained when using 10 g/ℓ of yease extract. Optimum concentrations of NH_(4)Cl and (NH_(4))_(2)SO_(4) for culture were found to be l.0g/ℓ and 0.1 g/ℓrespectively. The culture of MgS0_(4)·7H_(2)O was mostly about l.0g/ℓ as a sulfur source. It was also found that the cell concentrations were at the maximum level when grown on the medium containing l.0g/ℓ of KH_(2)PO_(4) and 0.lg/ℓ of CaCl_(2). Also, the optimum culture conditions were 30℃ and pH 6.0. Cultivation of P. fluorescens at high initial D.O value led to a decrease of bacterial productivity in batch culture. Maximum productivity was achieved at 68 for the initial D.O. value.
N₂O₃계 거대고리 리간드와 전이금속 이온과의 착물 형성에 관한 연구
최규성,박휴범,유한준 慶南大學校 附設 基礎科學硏究所 1992 硏究論文集 Vol.4 No.-
The stability constants of the complexes of transition metal ions(Co²+, Ni²+, Cu²+, and Zu²+) with N₂O₃-donor macrocyclic lignads such as 1,15-diaza-3,4 : 12,13-dibenzo-5,8,11-trioxacy-cloheptadecane(NenOdienH₄)and 1,15-diaza-3,4 :12, 13-dibenzo-5, 8, 11-trioxacyclooctade-cane( NtnOdieH₄)have been determined by polarographic method in MeOH solution at 25℃. From the results, the followings have been obstained, 1. In MeOH solution, transition metal ions from a 1:1 complex with these ligands. 2. The order complex stability constants of transition metal ions these ligands is Co(II) < Ni(II) <Cu(II) < Zn(II), the same as the natural order of stability proposed by Williams-Irving. 3. The order of stability constants of Ni(II), Cu(II) ions is NenOdienH₄> NtnOdienH₄, of Co(II), Zn(II) ions is NenOdienH₄< NtnOdienH₄.
하태선,이태수,차은종,박범수,한헌석,채수일 충북대학교 의과대학 충북대학교 의학연구소 1993 忠北醫大學術誌 Vol.3 No.1
본원 소아과 입원환자의 퇴원요약 기록을 전산관리하는 시스템을 개발하였다. 소아과 환자관리에 적합하도록 퇴원요약지를 설계하였고 개인용 컴퓨터를 사용하여 관리하도록 구성하였다. 주 기억장치 4MB와 보조기억 장치 120MB HDD을 장착한 PC-386DX 시스템을 기반으로 개발하였고 소프트웨어로는 FoxPro v2.0을 사용하였다. pull-down menu 방식과 window방식을 적용하여 비전문가라 할지라도 손쉽게 사용할수 있도록 하였고 정보입력 및 수정시 사용자 편의를 최대한 반영하고자 하였다. "AND"와 "OR"연산자를 사용하여 다양한 검색이 가능하였다. 본 시스템은 현재 본원 소아과에서 실무에 적용하고 있으며 향후 통계분석과 임상연구에 크게 활용할 수 있으리라 생각된다. A PC-based system was developded to manage discharge summary records of pediatric patients. It is based on a PC-386DX system equipped with 4MB memory and 120MB HDD, and its software was written in FOXPRO V2.0. Any users unfamiliar with computer can make an easy access to the data through pull-down menu and windows system. Logical operators of "AND" and/or "OR" enabled a flexible and various search conditions. The present system is being under clinical use in the Department of Pediatrics, and warrants future applications to statistical analysis as well as clinical research projects.