경추수술의 골이식 재료로서 장골과 Biocompatible Orthopaedic Polymer(BOP)에 대한 평가

신원한,박진규,김범태,최순관,변박장 대한신경외과학회 1998 Journal of Korean neurosurgical society Vol.27 No.6

선박매매용 지능형 거래 에이전트 설계

박남규,송한범 동명정보대학교 2002 사이버 비지니스 Vol.1 No.-

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.

전방 천골 수막류 - 증 례 보 고 -

박준석,신원한,김범태,변박장,최순관 대한신경외과학회 1998 Journal of Korean neurosurgical society Vol.27 No.11

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.

니켈촉매를 이용한 메탄의 부분산화에 의한 합성가스 제조

김상범,신기석,박은석,곽윤철,천한진,함현식 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.1

메탄의 부분산화에 의하여 힙성가스를 제조하였다. 촉매는 니켈 담지 촉매를 사용하였으며, 담지된 니켈의 양은 10-15 wt%이었다. 담체로는 BaO, CaO, MgO를 사용하였다. 촉매는 함침법으로 제조하였으며, 반응은 CH_4:O_2의 비가 2:1, 1 atm, 750℃에서 수행하였다. 반응결과, MgO를 담체로 사용하였을때 가장 좋은 촉매활성을 보여주었으며, 니켈의 담지량이 13 wt%일때 촉매의 활성이 가장 좋았다. 이 13 wt% Ni/MgO 촉매의 경우 80%의 메탄 전화율과 93% 및 94%의 CO 및 H_2 선택도를 각각 얻을 수 있었다. 또한 이 촘매는 약 180시간 정도의 반응 후에도 촉매의 활성이 감소하지 않았다. 논란 중인 반을 기구에 대하여 조사해 보기 위하여 펄스방식으로 반응물을 투입하며 촉매 상 · 하층의 온도를 측정하였고, 반응시간에 따른 반응물과 생성물의 몰수 변화, 그리고 O_2-TPD 실험을 수행하였다. 그 결과 메탄으로부터 합성가스가 생성되는 경로는 2단계반응으로써 메탄이 완전 산화되어 CO_2와 H_2O가 생성되고, 이 생성된 CO_2 및 H_2O가 미반응 메탄과 각각 개질반응을 하여 합성가스가 생성됨을 알 수 있었다. Synthesis gas producution by partial oxidation of methane has been investigated using BaO, CaO and MgO supported Ni catalysts. The catalysts were prepared by the impregnation method. The reaction was carried out at I atm, 750℃, and CH_4:O_2=2:1. The highest catalytic activity was obtained with MgO support when Ni loading was 13 wt%. With the 13 wt% Ni/MgO catalyst, methane conversion was 80%, and CO and H_2 selectivities were 93% and 94%, respectively. The activity of the catalyst remained nearly constant after 180h of the reaction. To investigate the reaction mechanism of this reaction, the temperature of the actalyst bed at top and products were determined with time; and O_2-TPD experiment was carried out. From the results, it is deduced that the reaction takes place by a two-step reaction-first, total oxidation of methane to CO_2 and H_2O takes place, and then the produced CO_2 and H_2O are further reacted with CH_4 to give synthesis gas.

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.

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.

외상성 하인두-경부 식도 손상

이강진,성명훈,박범정,성원진,노종렬,정산신,이승신,김광현 대한이비인후과학회 2001 대한이비인후과학회지 두경부외과학 Vol.44 No.11