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영상유도장비를 이용한 연수부 해면상 혈관종의 제거 1예
이기택,최광영,최찬영,손문준,이동준,황금철,황충진,박성혜 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.2
With increased use of magnetic resonance imaging(MRI), diagnosis of cavernous ma formations has become easy. These malformations are often small and can be difficult to localize during surgery. Small deep lesions within the brain. and/or near the eloquent areas are difficult to localize and resect without significant morbidity. But using the interactive Image Guided System, provides the 3-dimensional view of the actual lesions and it also allows the surgeon to plan a surgical strategy that takes into account the relationship of the lesion. Therefore Image Guided Surgery for deep seated or brain stem lesions represent a very accurate and safe method.
철인3종경기가 국가대표선수 및 동호인의 면역기능에 미치는 영향
박찬호(Chan Ho Park),최문기(Mun Gi Choi),박태곤(Tae Gon Park),전재영(Jae Young Jeon),김종원(Jong Won Kim),이경희(Kyung Hee Lee),김태운(Tae Un Kim) 한국사회체육학회 2007 한국사회체육학회지 Vol.0 No.31
The purpose of this study was to determine the effects of triathlon race on the changes of immunity function in male national and recreational triathletes. The subject were male elite triathletes(EG, n=7) and male recreational triathletes(RG, n=8). All of them completed the 2006 Tongyoung International Triathlon Race. The venous blood samples for leukocyte and subsets(neutrophil, lymphocyte, monocyte), immuno globulin(IgA, IgG, IgM), were collected on four occasions from each subject:1 days before the race, immediately after the event, 2 hours after, and 7 days after competition. All data were analyzed by repeated with ANOVA for comparison between groups, and the comparison for within group change was using Wilcoxon`s signed rank test of SPSS package program. The findings of the study were as follows:1. leukocyte and subset 1) In the comparison of changes in pre-race and post-race within each group, leukocyte and neutrophil were significantly increased immediately and 2 hours after the race in EG and RG. In contrast, lymphocyte and monocyte were significantly decreased immediately and 2 hours after the race in the both groups. 2) There were significant group by time interaction in changed scores in leukocyte, neutrophil, lymphocyte and monocyte. 2. Immunoglobulin 1) In the comparison of changes in pre-race and post-race within each group, IgA was significantly increased immediately after the race in EG. IgA, IgG and IgM were significantly decreased 2 hours after the race in RG. 2) There were not significant group by time interaction in changed scores immunoglobulin.
Cha, Gook Chan,Lee, Sukmin,Song, Jeom Sik,Kim, Jong Kwon,Kim, Kyung Hoon,Mun, Mu Seong,Youn, Hyoung Soon,Pyun, Do Gi,Choi, Yoon So Wiley Subscription Services, Inc., A Wiley Company 2006 Journal of applied polymer science Vol.100 No.4
<P>The purpose of this study is to prepare new polyurethane gels that can be used as stress- or pressure-distributing materials, particularly by being combined with selective plasticizers for medical or clinical applications. Because low-molecular-weight plasticizer molecules in polymer gels intrinsically tend to migrate to the surface of the gels by the so-called entropy effect in polymer miscibility, the stress-distributing function may decrease gradually after a certain amount of time. Correspondingly, both the chemical nature of the plasticizer and polymer gels and the compatibility between the polymer segments and plasticizer should be deliberately considered as important factors in determining the thermophysical properties and stress-distributing performance of polymer gels. New polyurethane gels comprising separated phases of soft and hard segments, the glass-transition temperature of which was around the ambient temperature, were prepared, and selective plasticizers were combined to obtain an optimized formulation of gels for stress-relieving properties. The glassy-to-rubbery transition of semicrystalline hard segments occurring around the ambient temperature caused the rearrangement of chain conformations, leading to the reduction of the pressure applied to the surface; this indicated that the pressure buildup or loss was somewhat related to the heat regulation by thermal absorption and release in the phase-transition range. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 2750–2758, 2006</P>
김우기 ( Woo-gi Kim ),김찬문 ( Chan-mun Kim ) 대한신경치료학회 2010 신경치료 Vol.14 No.1
The study investigated the effects of balance training with proprioceptive sensory and visual input on functional activity in hemiplegic patients. Subjects and Methods Forty-seven subjects were distributed into three groups: task-oriented balance training (n=15), visual feedback using a Tetrax® posturographic balance assessment and biofeedback device (n=15) and control (n=17). All individuals underwent neuromuscular developmental therapy during 8 weeks. Assessment tools were lower extremity strength (Morticity Index), Berg Balance Scale (BBS), Timed Up & Go Test (TUG), self-selective comfortable gait speed, and Fugl-Meyer Assessment (FMA). Variance was analyzed using one-way ANOVA to detect inter-group differences. Results As following the Results; In comparing inter-group differences, Morticity Index, FMA, and BBS were significantly different between the control group and the task-oriented balance training group (p<.05). TUG (p<.05), and self-selective comfortable gait speed (p<.001) were also significantly different between the control, task-oriented balance training, and visual feedback groups. Conclusion Task-oriented balance training is more effective in improving post-stroke functional ability. A variety of balance training programs that can be done easily and economically following hospital discharge should be developed for patients with post-stroke disabilities.
용·배수로의 보수재료로서 광물질 섬유보강 프리폼 크리트의 압축강도 특성 평가
조성문 ( Sung-mun Jo ),전상민 ( Sang-min Jeon ),김미솔 ( Mi-sol Kim ),추연재 ( Yeon-jae Choo ),김황희 ( Hwang-he Kim ),오리온 ( Ri-on Oh ),박찬기 ( Chan-gi Park ) 한국농공학회 2018 한국농공학회 학술대회초록집 Vol.2018 No.-
기존의 용·배수로는 현장타설 콘크리트 및 콘크리트 공장제품을 활용하여 시공한다. 현장타설 공법은 거푸집, 레미콘 믹서와 같은 장비가 필요하며, 거푸집 설치에 따른 소요시간으로 인하여 공사기간이 많이 소요된다. 콘크리트 2차 제품은 제작 후 형상 및 크기의 변경이 불가능하고 블록 간 연결부에서 하자가 발생한다. 최근 국외에서 수로 설치 및 사면 보강공사의 신속한 시공을 위하여 콘크리트 천을 사용하는 프리폼 크리트를 개발하여 용·배수로 및 사면안정공법에 적용하고 있다. 이 기술은 방염 처리된 패브릭과 방수용 PVC층 사이에, 특수 배합된 콘크리트를 넣어 만든 것으로 마치 두툼한 이불과 같은 형상을 하고 있으며, 철근콘크리트 공법이나 숏크리트 공법에 비해 간편하고 균일한 품질을 얻을 수 있다는 장점이 있다. 본 연구에서는 이와 같은 특성을 가진 프리폼 크리트의 최적 배합비를 결정하기 위한 압축강도 특성을 평가하였다. 프리폼 크리트의 성능을 평가하기 위하여 본 연구에서는 광물질섬유 및 광물질섬유의 혼입률, 규사의 사용량에 따른 압축강도 시험을 실시하였다. 보수 및 보강 재료로서 초기강도를 확보하기 위하여 시멘트는 초속경시멘트를 사용하였다. 또한 광물질섬유는 프리폼 크리트의 휨강도를 확보하기 위하여 적용하였다. 광물질섬유는 초속경 시멘트 중량에 0.0%, 0.5%, 1.0%, 1.5% 및 2.0%를 적용하였으며, 규사는 6호사를 시멘트와 중량비로 4:6, 5:5 및 6:4를 적용하였다. 시험결과 광물질 섬유의 혼입률이 증가할수록 4시간 및 28일 압축강도가 모두 증가하고 있다. 또한 규사의 사용량에 따른 결과 역시 규사보다는 시멘트 사용량이 증가할수록 압축강도는 증가하였다. 또한 광물질섬유는 월래스토나이트 섬유를 적용하는 것이 세피올나이트 섬유를 적용하는 경우보다 압축강도가 증가하는 결과를 나타냈다. 따라서 세피올나이트 섬유보다는 월래스토나이트 섬유를 적용하는 것이 프리폼 크리트의 압축강도 향상에 효과적이라는 것을 알 수 있었다.
$Fe_{73}Si_{16}B_7Nb_3Cu_1$ 나노결정합금 분말코아의 자기적 특성에 미치는 분말입도 및 볼밀링 시간의 영향
문병기,강성찬,박원욱,손근용,Mun, Byeong-Gi,Gang, Seong-Chan,Park, Won-Uk,Son, Geun-Yong 한국기계연구원 2004 硏究論文集 Vol.34 No.-
The influence of powder size and ball-milling time on the magnetic properties of $Fe_{73}Si_{16}B_7Nb_3Cu_1$ nanocrystalline alloy powder was investigated. Flake-shaped powders were produced by pulverizing the ribbons annealed at $550^\circC$ for 1 hour. The powders were classified and consolidated into core shapes at a pressure of 18ton/$cm^2$. The initial permeability at 100kHz of the inductor core produced using $53-75\mum$ powders showed the highest value although its consolidated density showed the lowest one. The reason for the result is due to the cracking of the particles larger than $75\mum$ during the consolidation process. The ball-milling of powders for 2-4 hours improved the consolidation density and the initial permeability of the cores. The intrinsic coercivity of the powder decreased as well, resulting from the stress relief of the powder by a short-time milling.
장진규,김환곤,류기찬,문경현,강영진,정영기 대한내과학회 1995 대한내과학회지 Vol.48 No.1
A choledochal cyst is a relatively rare disorder, usually diagnosed in infancy or childhood, although adult presentation is increasingly recognized. In recent years, it was found that the choledochal cyst is often complicated with anomalous junction of the pancreaticobiliary duct (AJPB). The main pancreatic duct and common bile duct normally unite within the sphincter. In the anomalous situation of the common duct which is long the junction lies beyond the influence of the sphincter. A biliary carcinoma is known to be related to a choledochal cyst and, more recently, the presence of the AJPB has been shown to increase the risk of gallbladder carcinoma, even in the absence of a choledochal cyst. We experienced the above case of anomalous junction of the choledochus & pancreatic duct which was diagnosed by ERCP, abdominal CT and upper abdominal sonography.