지난 2년간의 학회지 "신경정신의학" 심사 평가보고

김찬형,김세주,김도관,김성곤,박원명,송동호,박용천,이영문,오강섭,정영철,이상열,김주한,이동영,이헌정,함병주,김율리,김문두,김정진,이강욱,천근아,김재진,홍진표,홍승철 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.6

신규 3작용성 메타크릴레이트의 치과용 광중합형 콤포짓트 레진용 단량체로서의 응용 연구

김중곤,정찬문,김민성,김광만,김경남 大韓齒科器材學會 2001 대한치과재료학회지 Vol.28 No.4

Tris[4-(2-hydroxy-3-methacryloxypropoxy)phenyl]methane(THMPM) was prepared easily from triphenylolmethane triglycidyl ether in good yield. As compared with composite resin formulated with difunctional bis-GMA, the physical properties of a newly developed composite resin formulated with trifunctional THMPM was evaluated. Cytotoxicity and acute toxicity of composite resin based on trifunctional THMPM evaluated according to ISO standard method. The depth of cure of the composite resin based THMPM was higher than that of the bis-GMA composite. There were no significant differences in flexural strength and water sorption between the composites resin based on THMPM and bis-GMA. The water-solubility value for the light-activated composite resins formulated with THMPM was much lower than that for a control bis-GMA composite. According to cytotoxicity evaluation, the composite resin based on THMPM showed very mild cytotoxicity with the response index of between 0/0 and 1/0. No acute toxicity of composite resin formulated with trifunctional THMPM was also observed. It is believed that THMPM is promising candidate for application as a photocurable dental composite resin.

실리카흄을 흔입한 고강도 콘크리트 개발

홍창우,김태경,김경진,김성환,김남윤,심도식,이정호,윤청호,백민경,원치문,박제선,이주형,정경일 강원대학교 석재복합신소재제품연구센터 1996 석재연 논문집 Vol.1 No.-

콘크리트 구조물이 대형화됨에 따라 설계단면이 증대되어 상대적으로 많은 경제적 손실을 부담하게 된다. 따라서 단면을 감소시키면서도 소요의 하중에 안전한 구조물을 건설하기 위해서는 우선적으로 구조물 건설에 기초가 되는 고품질, 고내구성의 고강도 콘크리트 개발이 절실히 요구된다 본 연구에서는 일정 시멘트비 및 혼화재 비율하에서 소요의 워커빌리티가 확보되는 고강도 콘크리트를 시간과 온도의 변화에 따라 증기 양생하여, 압축, 인장, 휨강도 뿐만 아니라 파괴특성을 실험적으로 연구하였다. 시료 제작시 시멘트 입자 사이의 공극 및 불연속 영역을 충전하여 고밀도화하기 위한 콘크리트용 혼화재로 시멘트 비표면적이 상당히 작은 초미립 분말인 실리카흄을 이용하였다. 또한 AE감수제 및 고성능 유동화제를 사용하여 혼화재의 첨가에 의하여 발생될 수 있는 워커빌리티의 감소를 방지하였다. 실험결과에 의하면 일정 양생 지속 시간하에서 온도의 증가에 따라 콘크리트의 압축, 인장 및 휨강도가 전반적으로 증가하였다. 동일하게 일정 온도하에서 양생 지속시간이 커짐에 따라 강도들이 증가됨을 알 수 있었다. 따라서 상대적으로 높은 온도와 긴 지속 양생 조건하에서 파괴에 대한 저항력이 크게 나타났다. The compressible, tensible, and flexibleresistance of the high strength concrete is analyzed by the experimentation in the present study. For the test, we cure several samples with the silica fume as a mixture being become dense the spaces between the particle of cement under the variation of both the temperature and the curing-interval. Then, the superplasticizer and the ezcon are also used to satisfy the required workability for construction. The compressible, tensible, and flexible resistances to a stress are increased as increasing the temperature and the time interval for the curing. Therefore it is concluded that the overal fractural and mechanical properties is improved by mixing the silica fume into the cement.

위 MALT 림프종에서 다발성 림프절 전이로 오인된 동시성 림프절 결핵 1예

김성은,김규종,김도현,송준영,문대성,장리라,유찬희,문원,박무인,박선자,김영옥 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.2

28세 남자가 내시경적 점막절제술을 통해 저등급 위MALT 림프종으로 진단되었다. 병기설정을 위해 18F-FDG PET 검사를 시행하였고 우측 쇄골상부, 우측상/하부 기관주위, AP window 부위에 강한 섭취가 관찰되어 전이성 림프절로 판단하였다. 그러나, 우측 쇄골상부 림프절에서 시행한 절제생검에서 만성육아종성염증소견이 관찰되었고 조직의 결핵 중합효소연쇄반응에서도 양성 반응을 보였다. 2개월간 항결핵제의 사용 후 시행한 추적 컴퓨터단층촬영 검사에서 림프절 크기의 감소를 보여 최종적으로 위 MALT 림프종에서 광범위 림프절 전이로 오인된 동시성 림프절 결핵으로 진단되었다. A 28-year-old man was diagnosed as gastric MALT lymphoma in diagnostic EMR (endoscopic mucosal resection). He subsequently underwent an 18F-FDG PET. 18F-FDG PET showed intense multifocal uptake in right supraclavicular, right upper and lower paratracheal, and AP window areas that was considered radiologically to represent widespread metastatic lymphadenopathy. Excisional biopsy of a supraclavicular lymph node, however, revealed chronic granulomatous lymphadenitis with a positive reaction of Tb-nested PCR. After antituberculosis treatment for 2 months, a follow-up CT scan showed complete resolution of the lesions. Intense 18F-FDG uptake could be due to an infectious process such as synchronous tuberculous lymphadenitis. Therefore, this could mimic a malignant condition such as lymphoma with extensive lymph node metastasis due to a false-positive finding, which may lead to a misdiagnosis.

황화 Ni-Mo/γ-Al₂O₃ 촉매상에서 1-Hexene의 수소화반응에 관한 Thiophene의 영향

김경림,유성현,김문찬,박해경 연세대학교 대학원 1992 延世論叢 Vol.28 No.1

The effect of thiophene on hydrogenation of 1-hexene over sulfided NiMo/γ-Al2O3 catalyst was studied in a fixed bed continuous flow reactor. The ranges of experimental conditions were at the temperatures between 200 and 350℃, the atmospheric pressure, the concentrations of thiophene between 0 and 0.04 mol% and the contact times between 0.04 and 0.1 g cat.h/mL. The hydrogenation increased with increasing temperature but isomerization decreased with increasing temperature. Total conversion and hydrogenation decreased with increasing concentration of thiophene but isomerization increased with increasing concentration of thiophene. The reaction order of 1-hexene was pseudo first with respect to 1-hexene and the activation energy for 1-hexene was found to be 8.8 kJ/mol over sulfided NiMo/γ-Al2O3 catalyst by Arrhenius plot.

귀금속 촉매상에서 수증기 개질반응 연구

김문찬 청주대학교 산업과학연구소 2023 産業科學硏究 Vol.41 No.1

In this study, a commercially used Ni catalyst was prepared, and a Ru catalyst, a kind of noble metal, was prepared to overcome the disadvantages of the Ni catalyst, and a steam reforming reaction was performed. LPG was used as a raw material, and hydrogen yield and methane and carbon monoxide concentrations according to temperature and steam/carbon ratio (S/C ratio) were studied, and the following conclusions were obtained. It was found that the yield of hydrogen increased as reforming reaction using LPG as a raw material. At a relatively low temperature of 600℃, the Ru catalyst, a noble metal catalyst, had a very low hydrogen yield compared to the Ni catalyst, but at 700℃ and 750℃, which are the temperatures mainly used in the reformer, the hydrogen yields were increased by 1.5% and 6.1%, respectively. On the Ni catalyst, as the steam/carbon ratio(S/C ratio) increased from 3.7 to 4.6, the hydrogen yield decreased slightly, but on the Ru catalyst, it increased slightly.

자동차용 냉연강판의 도장성에 관한 연구

김순경,전언찬,김문경 동아대학교 공과대학부설 생산기술연구소 1998 生産技術硏究所硏究論文集 Vol.3 No.2

One customer criterion of surface finish quality of cold rolled sheet for automotive and appliance applications is the as-painted apperance of the final products. Especially, the current emphasis on control of surface roughness of cold rolled steel sheet has been prompted by the automotive industry's concern with the as-painted appearance of sheet products, because the influence of such characteristics on paintability, formability and painted surface appearance is important in defining steel surface requirements for automotive industries. This paper is dedicated primarily to the issue of painted appearance and reviews for improvement of roughness and peak count. The conclusions are obtained as follows ; 1) Painted sheet appearance is strongly affected by surface roughness and peak count of base-metal and influenced by the topographical properties of substrate, paint thickness and zinc coating variables. 2) The painted appearance of shot blast textured(SBT) and electro-discharge textured(EDT) automotive cold rolled steels sheet was determined and related to surface roughness parameters, zinc coating method, and paint thickness.

백서에서 신 허혈성 손상에 미치는 칼슘 길항제의 효과

문철웅,정종훈,박천국,이승일,배학연,장경식,김만우,정춘해,홍순표,이병래,김호중 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1

Renal ischemia is one of the most common causes of acute renal failure. Four factors related to the pathogenesis of acute renal failure are vasoconstriction, decreased glomerular filtration rate, tubular back leak of filtrate, and intratubular obstruction. The cellular response to renal ischemic insults include decreased content of adenosine trihosphate, lipid peroxidation induced membrane degradation, alteration in cellular pH, and calcium or phospholipase induced mitochondrial dysfunction. Much attention has been given to the role of increased cellular calcium as a pathogenetic contributor to cell injury during ischemia. Author studied the protective effects of calcium antagonists on cellular injury during renal ischemia in rat. To investigate the protective role of these agents, author measured the amount of malondialdehyde(MDA) and the enzyme activities of free radical scarvengers-superoxide dismutase(SOD), catalase and glutathione peroxidase from non-pretreated group and calcium antagonists pretreated groups in control, ischemia and reflow subgroups. The results were summerized as follows: 1) The amount of MDA in non-pretreated group was higher in the reflow compared with the control(<p<0.01). But, in all pretreated groups, there was no statistically difference in the amount of MDA. 2) The SOD activity in non-pretreated group was lower in both the ischemia and the reflow compared with the control (P<0.05). But, in both verapamil and trifluoperazine-pretreated groups, there was no statistically difference in the SOD activity. 3) Both catalase and glutathione peroxidase activities in non-pretreated group were lower in both the ischemia and the reflow compared with the control (P<0.05). But in all pretreated groups, there was no statically difference in both catalase and glutathione peroxidase activities. These results suggest that free radical mediated ischemic injury by renal artery clamp in rat can be protected by intraperitoneal pretreatment with calcium antagonists. As trifluoperazine has a protective effect in renal ischemia, the calcium activated calmodulin dependent enzyme may play a role in renal ischemic injury.

Taylor 모델을 이용한 역동역학 뉴로제어기의 설계와 전력계통 안정화장치에 적용

김문찬,부창진,김호찬 제주대학교 공과대학 첨단기술연구소 2003 尖端技術硏究所論文集 Vol.14 No.2

This paper presents an implementation of power system stabilizer using inverse dynamic neuro controller. Traditionally. mutilayer neural network is used for a universal approximator and applied to a system as a neuro-controller. In this case. at least two neural networks are used and continuous tuning of neuro -controller is required. Moreover, training of neural network is required considering all possible disturbances, which is impractical in real situation. In this paper,Taylor Model Based Inverse Dynamic Neuro Model (TMBIDNM) is introduced to avoid this problem. Inverse Dynamic Neuro Controller(IDNC) consists of TMBIDNM and Error Reduction Neuro Model(ERNM). Once the TMBIDNM is trained. it does not require retuning for cases with other types of disturbances. The controller is tested for one machine and infinite-bus power system for various operating conditions.

골격성 고정원을 이용한 상악 6전치 후방 견인시 힘의 적용점 변화에 따른 치아 이동 양상에 관한 유한 요소법적 분석

김찬년,성재현,경희문 대한치과교정학회 2003 대한치과교정학회지 Vol.33 No.5

본 연구에서는 활주법을 이용한 전치부 후방 견인시 micro-implant의 다양한 수직적 위치와 전치부에서 힘의 적용점에 따른 치아 이동 양상을 관찰하여 공간 폐쇄시 전치부의 설측 경사와 정출력을 방지할 수 있는 micro-implant의 위치와 전치부 힘의 적용점의 위치를 알아보고자 하였다. 유한 요소 모델을 이용하여 제1소구치가 발거된 상악 치열궁형태를 제작하고 .022" × .028" 슬롯 브라켓을 모형 화하여 치아에 부착시켰다. .019" × .025" stainless steel 선재를 3차원 beam모형으로 제작하고 상악 측절치와 견치 브라켓 사이의 선재 상에 .032" × .032"크기의 stainless steel hook을 수직으로 8mm의 높이로 형성하였으며, 선재로부터 2mm높이에서 1mm간격으로 8mm까지 힘 적용점을 설정하였다. 지름 1.2mm, 길이 6mm의 micro-implant를 제2소구치와 제1대구치 사이의 치조골에 선재로부터 4mm에서 10mm까지 2mm간격으로 4개를 위치시켰다. 각각의 micro-implant와 전치부 hook에 150gm의 힘을 적용시켜 다양한 힘 적용점에 따른 치아의 초기 변위를 분석하여 다음의 결과를 얻을 수 있었다. 1. Micro-implant 높이가 4mm일 경우 5mm이하의 전치부 hook 높이에서는 전치부 설측 경사 이동이 일어났으며 전치부 hook 높이가 6mm이상 되었을 때 전치부 순측 경사 이동이 일어났다. 2. Micro-implant 높이가 6mm일 경우 5mm 이하의 전치부 hook높이에서 전치부 설측 경사 이동이 일어났으며 전치부 hook높이가 6mm이상 되었을 때 전치부 순측 경사 이동이 일어났다. 이것은 4mm micro-implant에서의 실험결과와 유사한 이동 양상을 나타내었지만, micro-implant 높이가 6mm일 때 전치부 설측 경사 이동이 좀더 감소하였다. 3. Micro-implant 높이가 8mm일 경우 전치부 hook 높이가 2mm일 때 전치의 설측 경사 이동이 일어났으며 3mm 이상의 전치부 hook 높이에서 순측 경사 이동이 비례적으로 증가하였다. 4. Micro-implant 높이가 10mm일 경우 전치부 hook높이가 2mm이상에서 전치의 순측 경사 이동이 비례적으로 증가하였다. 5. 전치부 hook 높이가 증가할수록 전치의 순측 경사 이동이 증가되지만 선재의 뒤틀림에 의한 변형이 증가되므로 견치와 소구치 부위에서 정출력이 발생하는 바람직하지 못한 치아 이동 양상이 일어났다. 6. Micro-implant를 이용한 상악 6전치 후방 견인시 구치부의 이동은 선재와 브라켓 사이의 마찰력에 의해서 원심경사 이동이 발생하였다. The purpose of this study was to investigate the micro-implant height and anterior hook height to prevent maxillary six anterior teeth from lingual tipping and extruding during space closure. We manufactured maxillary dental arch form, bracket and wire, using the computer aided three-dimensional finite element method. Bracket was .022" × .028" slot size and attached to tooth surface. Wire was .019" × .025" stainless steel and .032" × .032" stainless steel hook was attached to wire between lateral incisor and canine. Length of hook was 8mm and force application points were marked at intervals of 1mm. Four micro-implants were implanted on alveolar bone between second premolar and first molar. The heights of them were 4, 6, 8, 10mm starting from wire. We analyzed initial displacement of teeth by various force application point applying force of 150gm to each micro-implant and anterior hook. The conclusions of this study are as the following : 1. When the micro-implant height was 4mm and the anterior hook height was 5mm and below, anterior teeth were tipped lingually. When the anterior hook height was 6mm and above, anterior teeth were tipped labially. 2. When the micro-implant height was 6mm and the anterior hook height was 5mm and below, the anterior teeth were tipped lingually. When the anterior hook height was 6mm and above, the anterior teeth were tipped labially. But lingual tipping of anterior teeth decreased and labial tipping increased when the micro-implant height was 6mm, compared with 4mm micro-implant height. 3. When the micro-implant height was 8mm and the anterior hook height was 2mm, the anterior teeth were tipped lingually. When the anterior hook height was 3mm and above, labial tipping movement of the anterior teeth increased proportionally. 4. When the micro-implant height was 10mm and the anterior hook height was 2mm and above, labial tipping of the anterior teeth increased proportionally. 5. As the anterior hook height increased, anterior teeth were tipped more labially. But extrusion occurred on canine and premolar area because of the increase of wire distortion. 6. Movement of the posterior teeth was tipped distally during maxillary six anterior teeth retraction using micro-implant because of the friction between bracket and wire. Based on the results of this study, we could predict the pattern of the tooth movement according to position of micro-implant and height of anterior hook. It seems that we can find the force application point for proper tooth movement in consideration of inclination of maxillary anterior teeth, periodontal condition, overjet and overbite.