재발성 류마티즘 환자에서 발작의 유발인자

주유철,이동민,양종태,신병철,임태영,서정균,정기영,최동헌,김원,조영신,고희관 조선대학교 2001 The Medical Journal of Chosun University Vol.26 No.2

Background and Objectives : Palindromic rheumatism (PR) is known to be triggered without any obviously inciting events in most patients, although, in a few cases, attacks have been noted to relate to another events such as weather change, childbirth, ingestion of certain foods, or over-exercise. The aim of this study was to characterize the triggering factors on palindromic attacks. Materials and Methods : We evaluated sixty-four patients with PR for the presence of triggering factors and the relationship between attacks and triggering factors by interview of patients. We considered that there was an probable association between episodes and PR, if episodes within 24 hours prior to PR had triggered at least 50% of all attacks and a definite association between episodes and PR, if episodes within 24 hours prior to PR had triggered 100% of all attacks. Results : In 15 patients (35.9%), there was a possible association between episodes of PR and initiating events. In 8 patients (12.5%), there was a definite association between episodes of PR and initiating events. The triggering factors were physical over-activity including exercise (19/64: 29.7%), foods, such as rawfish, crab, and chicken, including alcohol (19/96: 19.8%). However, there were no difference between the groups with and without the triggering factor in sex ratio, duration and onset of PR, the positive rate of rheumatoid factor and involved sites. Conclusion : Our observations showed that PR was triggered by physical over-activity more than in previous reports and hypersensitivity to foods was a causative factor in some patients with PR. However, patients with triggering factors had a similiar clinical profile to patients without triggering factors.

생쥐 위장관의 Interstitial cells of Cajal(ICC)에 대한 면역조직화학적 연구

김영철,차경훈,신무경,임건한,김주영,안병수,김장만,양경철,박도영,오재욱,장인엽 조선대학교 2003 The Medical Journal of Chosun University Vol.28 No.1

Background and Objectives : Interstitial cells of Cajal(ICC) are the pacemakers in gastrointestinal tract that modulates gastrointestinal motiliey and these cells also transmit neural input from enteric nerves to smooth muscles. Recent work on tissues from patients with motility disorders that suggest that loss or defect in ICC could be related to pathophysiology in human and animal models. Immunolabelling of ICC in intestinal wall is recently developed by using specific marker, anti-c-kit antibody. Immunohistochemistry was done for ICC network in attempt to provide a morphological basis for the mechanism regulating gastrointestinal motility Methods : Cryosection was done, and whole-mount preparations of mouse stomach, gastrointestinal tract were immunolabelled using the anti-c-Kit. Immunolabelled ICC networks were observed under a confocal laser scanning microscopy. Results : According to three dimensional reconstruction study, we found that the c-Kit-positive celluar networks were widely distributed in the gastrointestinal muscle (1) circular muscle layer(IC-IM), (2) myenteric plexus(IC-MY), (3) deep muscular plexus(IC-DMP) in ileum, (4) submucosal plexus(IC-SMP) and longitudinal muscle layer(IC-LM) in colon. Conclusion : The characteristic profiles of ICC celluar networks provide a morphological basis upon the mechanism regulating gastrointestinal motility. Additional studies for the enteric nerves-ICC interaction are need to evaluate the detailed roles of Icc in gastrointestinal tract.

인터넷 중독 청소년들의 정신병리 및 대처 방식

안영균(Young Kyun Ahn),신영철(Young Chul Shin),고복자(Bok Ja Koh),심진현(Jin Hyun Shim),김범조(Bum Jo Kim),이승민(Seung Min Lee),이길홍(Kil Hong Lee) 한국중독정신의학회 2005 중독정신의학 Vol.9 No.1

This study was conducted to investigate the differences in psychopathology and coping strategies among internet addictors, over users and non addictors in high school students. Subjects were 273 high school students in Seoul city. Self rating questionnaires included demographic data, Young’s Internet Addiction Scale, SCL-90-R, Beck Depression Inventory, Spielberger State-Trait Anxiety Inventory, and The Way of Coping Strategy. Subjects were classified into 3 groups (addiction, over use, non addiction) by Internet Addiction Scale score. Prevalence of internet addiction was 4.3% and male adolescents were more addictive than female. Students who were mainly involved with internet chatting or game showed higher internet addiction score. The addiction group and over use group showed higher level of somatization, obsession, interpersonal sensitivity, depression, anxiety, hostility, and paranoia than non-addicted group. Addiction group and over use group used passive coping strategies more frequently in the stressful situation than nonaddicted group. Also, the regression analysis for finding out causal factors that predicts internet addiction showed that emotion relieving strategy were important variable which predict internet addiction. Interpersonal sensitivity and emotion relieving coping strategy was important to predict addiction. This study showed that problematic internet use was closely associated with psychopathology and psychiatric comorbidity. And high interpersonal sensitivity and emotion relieving coping strategy were related with internet addiction in adolescence.

Aluminum-free low-modulus Ti–C composites that exhibit reduced image artifacts during MRI

Kim, Sung-Chul,Lee, Hong-Jun,Son, Seong-Guk,Seok, Hyun-Kwang,Lee, Kang-Sik,Shin, Seung-Young,Lee, Jae-Chul Elsevier 2015 ACTA BIOMATERIALIA Vol.12 No.-

<P><B>Abstract</B></P> <P>Feasibility studies were performed to determine the suitability of a novel synthesis technique for fabricating multifunctional composite materials for orthopedic implants. By blending paramagnetic Ti powder with diamagnetic graphite and consolidating the resulting mixtures, Ti–C composites that cannot be feasibly obtained via conventional alloying techniques or ingot metallurgy were synthesized. The synthesized composite material exhibited extremely low magnetic susceptibility (χ=67.6×10<SUP>−6</SUP>), and, as a result, exhibited fewer artifacts during magnetic resonance imaging. The strength of the composite material (σ=770MPa) was such that it could support external loads to which the human body is subjected, but its Young’s modulus was low (<I>E</I> =81.9 GPa) such that it could mitigate the stress-shielding effect. The material was also free from toxic elements such as Al and V and, thus, can be considered less harmful.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

미분변환에 의한 가변단면을 갖는 봉의 진동해석

신영재,신영철 安東大學校 工業技術硏究所 2001 공업기술연구논문집 Vol.8 No.1

In this paper the Differential Transformation technique is applied to analyze the longitudinal vibration of bar with non-uniform cross-section area. The governing equation of motion of the non-uniform bar is derived. The concept of differential transform is briefly introduced. And the natural frequencies of the bar were obtained and analyzed under various geometric and boundary conditions by using the differential transformation solutions. The calculated results from the differential-transformation solutions bear very high accuracy.

배전압 회로를 이용한 마이크로웨이브-DC 변환효율 개선에 관한 연구

신동훈,이영철,김태효 慶南大學校 附設 工業技術硏究所 1999 硏究論文集 Vol.17 No.-

본 논문에서는 2.45GHz의 무선전력전송을 위한 마이크로웨이브-DC 변환효율 특성을 나타내는 정류안테나(Rectenna)를 설계 ㆍ 제작하였다. 정류안테나에서 마이크로웨이브-DC 변환효율을 향상시키기 위해서 배전압 회로(Voltage Doubler Circuit)를 사용하여 변환효율을 이론적 ㆍ 실험적으로 분석하였으며 단일 다이오드를 사용하였을 때 정류회로의 변환효율은 약 65%이며, 배전압 회로를 사용했을 때는 약 80%의 변환효율을 보였다. In this paper, we designed the rectenna elements which converts microwave energy into DC for Wireless Power Transmission. We used Voltage Doubler Circuit to improve the converting efficiency of the Rectenna array microwave-to-DC conversion, and analyzed the converting efficiency of the Rectenna both experimently and theoretically. In the case of single diode, we have obtained about 65% conversion of efficiency for the rectifying circuit, and with double diodes has proved about 80% efficiency.

"후천성안면열-Noma 후유증"의 치험례

신영진,윤근철 大韓成形外科學會 1989 Archives of Plastic Surgery Vol.16 No.5

The authors experienced reconstruction of a complex adult facial deformity extending from right side of nose to right anterior part of the maxilla owing to tissue necrosis from small pox complication in a neonate. Because the event ocurred in the very early period of life, the secondary deviation of the facial structures through growth was an additional problem besides simple tissue defects. As it seemed that was vary like the features of congenital facial cleft due to the error in viviparity, we dared to name deformity acquired facial cleft. Etiologically the deformity can be classified as a sequale of noma which defines a mixed aggressive infection of the facial tissue in chronically mal nourished children during or soon after an acute debilitation illness. Because the socioeconomic condition of our country has improved so much, active noma cases are rare nowadays. So we are presenting a case of acquired facial cleft due to noma sequale for following reasons in summary. 1. Noma survivor is quite rare nowadays and there is rare clinical report of reconstructing that deformity in this country. 2. Because the deformity or defects of this case involves multiple facial units, we consider the experience of reconstructing this case is invaluable.

선택적 적분방법을 이용한 개선된 축대칭요소

신재철,김용우,이창원,김선훈 충남대학교 산업기술연구소 2002 산업기술연구논문집 Vol.17 No.1

The ordinary conforming solid axisymmetric elements have excessive flexural stiffness that stems from the fact that the elements adapt to flexure by deforming in shear deformation mode. In this paper, the behaviors of conforming isoparametric 8-node quadrilateral solid axisymmetric element are improved by adding nonconforming displacement mode and adapting selective reduced integration method.

어린 나이에 피부암을 동반한 색소성 건피증 1예

신삼식,이지범,이승철,원영호 全南大醫大 2000 전남의대학술지 Vol.36 No.1

大田市 綠地開發에 관한 硏究

申永澈 培材大學校 1984 論文集 Vol.5 No.-

The study come to conclusion that Daejeon city make rapid progress as leading city of middle in Korea. It is said that development of open space is subject matters which Daejeon city is confronted with public pollution etc. It is supposed that open space must not be neglected in progress of city, because it is offered atmosphere of health, recreation, emotional feeling etc. It mikes a plan which develop open spen area(499.32㎢) in total city planning zone (557.72㎢) in Daejeon city on a 20 years' program, therefore it can accomplish construction of garden city through efficient conservation and development of open space in Daejeon city . The results are summarized as follow : 1. It is necessary to have positive practical application of natural resources and conservation of ecological environments is Urban area. 2. It is necessary to have positive development of river of Ryudeung-chon, Gap-chon, Daejeon-chon streamed in Urban area. 3. It is necessary to have positive plan for afforestation of main roads runned in Urban. 4. It is necessary to have a system of Urban open space.