실리카가 첨가된 PEHA/PS 코어-쉘 압력가소성 고분자의 합성

양의석,김유진,이상석,류상욱 충북대학교 산업과학기술연구소 2011 산업과학기술연구 논문집 Vol.25 No.2

본문참고

유도 맞잡기 타입과 받기의 신장에 따른 허벅다리걸기의 Kinematic 분석[2]

권문석,김의환,조동희 한국운동역학회 2002 한국운동역학회지 Vol.12 No.2

본 연구는 6년 이상의 유도경력 소유자인 Y.대학교 유도전공자를 대상으로 맞잡기 타입과 받기신장에 따른 허벅다리걸기 동작시 3차원 영상분석법을 이용하여 운동학적 변인의 특성을 분석하는데 그 목적이 있다. 유도 맞잡기 타입과 받기신장에 따른 허벅다리걸기 동작은 비디오카메라 2대를 사용하여 촬영(30frame/sec.)하였으며, 분석을 위한 운동학적 변인들은 시간, 자세, 중심변인이며, 실험 결과에 대한 분석과 논의를 통하여 다음과 같은 결론 및 제언을 얻을 수 있었다. 허벅다리걸기 동작의 맞잡기 타입에 따른 유의한 차이는 3국면 소요시간, 걸기1단계 공격둔부각, 걸기1단계 공격무릎각, 걸기2단계 공격무릎각, 걸기2단계 지지무릎각, 걸기1단계 공격발목각, 걸기2단계 지지발목각에서 유의한 차이(p<.05)를 보였다. 종합해보면, 허벅다리걸기를 수행할 때 맞잡기와 상대신장이 허벅다리걸기 기술에 영향을 미친다는 것을 알 수 있었으며, 상대의 신장이 작을 경우 목 뒤를 잡는 타입 A가 시간이 단축(<.05)되었다. 따라서 경기 중 상대의 신장이 작다면 목 뒤를 잡는 것이 유리하다.이러한 사실들을 종합해 볼 때, 유도 경기 중 허벅다리걸기를 수행할 대 맞잡기가 많은 영향을 주었다. 또한 기술의 핵심단계인 3(걸기)국면에서도 받기신장에 의한 차가 더 크게 나타나 받기신장 역시 많은 영향을 주었다. 단계별 변인들의 변화량에 있어서는 전체적으로 모든 변인들이 변화량에서 큰 차이를 나타내지는 않았다고 할 수 있다. 따라서 맞잡기와 받기신장은 상당한 관계가 있음을 알 수 있었으며 유도 경기 중 상대에 따른 다양한 잡기와 신장을 고려한 기술이 요구된다. This study was to analyze the kinematic variables when the subjects performing Uchi-mata(inner thigh reaping throw) by Kumi-kata types((How to grasp A or B?) and two different opponent's height in Judo. Kinematic variables were temporal, posture. Data analysis was collective comparison of two-way ANOVA, t-test by type A&B and two different opponent's height. There were significant difference of Kumi-kata types(p<.05) in the time elapsed on Kake phase(KP : throwing phase) and hip, knee, ankle-angle of the attacking foot in the 1st stage of KP and knee, ankle-angle of the attacking foot and hip, knee ankle-angle of the supporting foot in the 2nd stage of KP. There were significant difference of two opponent's(p<.05) in the time elapsed on KP and hip-angle of the supporting foot in 1st stage of KP. Therefore, the interaction effect(p<.05) were in the time elapsed on KP and hip-angle of the supporting foot in the 2nd stage of KP. So, It could be suggested that Judoka hold on the part-behind neck lapel(type A) at the sleeve with the other of Judogi jacked when opponent's height was short. Because the time elapsed on KP of type B was not so fast as type A(p<.05) during performed Uchi-mata, and also the bigger hip-angle of the supporting foot in the 2nd stage of KP grew, the faster the time elapsed on KP became.

비소세포 폐암종에서 Epidiermal growth factor receptor(EGFR)의 발현 양상

임석호,이지혜,조현득,오미혜,김의한 순천향의학연구소 2008 Journal of Soonchunhyang Medical Science Vol.14 No.1

배경: 비소세포 폐암종에서 epidermal growth factor receptor (EGFR)의 발현이 예후에 미치는 영향에 대해서는 아직 일치된 결론에 이르지 못하고 있으며, 비소세포 폐암종의 조직 병리학적 소견으로는 종양의 진행 및 예후에 대해 예측이 불가능하다. 이에 저자들은 종양의 EGFR 발현과 임상 및 병리학적 특징과의 관계를 관찰하였다. 재료 및 방법: 1990년부터 2004년까지 순천향 대학교 천안병원에서 수술로 절제된 95명 환자의 포르말린에 고정한 파라핀 포매 조직을 이용하여 EGFR 항체를 이용한 면역조직화착 검사를 시행하였으며 이의 결과를 환자의 임상양상과 병리학적 소견과 비교 분석하였다. 결과: EGFR 발현과 환자의 생존기간을 비롯한 성별, TNM 임상병기, TU댕기, N-병기와는 관련이 없었으나 조직학적 유형중 편평상피암종은 47예중 43예가 양성 반응을 보여 통계학적으로 의미 있는 상관관계를 보였다(p=0.005). 그 외에 성별, 조직학적 유형, TNM 임상병기, T-병기, N-병기중 어떠한 변수도 생존기간과의 연관성을 보이지 않았다. 결론: 비소세포 폐암종에서 EGFR의 발현은 환자의 생존기간 및 임상병리학적 소견과 유의한 상관관계를 보이지 않으므로 예후인자로서의 이용은 현재로선 불가능하여 좀 더 많은 증례를 통한 연구가 필요할 것으로 사료된다. Background: The prognostic role of epidermal growth factor receptor (EGFR) remains controversial in patients with non-small cell lung cancer (NSCLC). Histopathologic findings cannot adequately predict disease progression, so we investigated the reladonship between EGFR and clinicopathologic feature. Methods: Using immunohistochemical techniques, we retrospecdvely analyzed formalin-fixed, paraffin-embedded samples from 95 padents with resected pathological NSCLCs. Then, we correlated these data with padents' clinical outcome and pathologic finding. Results: No reladonship was found between EGFR overexpression and patient survival when the entire cohort was considered. Multivariate factors including gender, histologic type, TNM stage, T stage and N stage were not correlated to poor outcome. Also, no factors revealed correlation with EGFR overexpression except histologic type. Squamous cell carcinoma showed positive reaction in 43 out of 47 patients(p=0.005). Condusion: This result indicated that EGFR overexpression in NSCLC showed no reladonship with patients' survival. Therefore, EGFR overexpression could not be used as a poor prognostic marker.

축구 오버헤드 킥 동작의 운동학적 분석

김의환,이요열,김성섭,권문석,김성호 한국운동역학회 2003 한국운동역학회지 Vol.13 No.1

Kim, E-H · Lee , Y-Y · Kim, S-S· Kwon, M-S · Kim, S-H. The kinematical Analysis of the Overhead Kick on Soccer. Korean Journal of Sport Biomechanics. Vol. 13, No. 1,pp. 155-171. The purpose of this study was to analyze the kinematic variables of over head Kick(OHK) in soccer with three dimensional analysis technique and show the kinematic characteristics of it. The 7 subjects were university football player who have been playing football more than 7 years. The OHK was filmed on 16mm video camera(30frame/sec.) kinematic variables were temporal, postures, and COG(center of gravity). The mean values and the standard deviation for each variables were obtained and used as basic factors for examining characteristics of OHK. the results of this analysis were as follows : Temporal variables : The total time elapsed(TE) of OHK was0.94~1.14sec., the 1st phase was 0.35sec., 2nd phase was 0.46sec., and 3rd phase was 0.22sec.. Posture variables : When subjects performed OHK at the impact event, the ankle and knee angle of kicking foot were more extend than supporting foot. but the hip angle of supporting foot were more extend than kicking foot. Moving distance of the center of mass of the both foot : When subject performed OHK at the impact event, the range of distance on mediolateral direction aspect into right · left shoulder line, anteroposterior direction aspect was 20.9±10.5cm, vertical direction aspect was 92.3±19.9cm. Angular velocity : the faster angular velocity of knee · ankle on the kicking foot grew form jump position to landing position, the faster velocity of ball became. C. O. G. variables : When subject performed OHK at the impact event, upper part of the body was getting lower, lower part of the body was getting higher.

유도 맞잡기 타입에 따른 허벅다리걸기의 Kinematic 분석 [Ⅰ]

김의환,조동희,권문석 한국운동역학회 2002 한국운동역학회지 Vol.12 No.1

The purpose of this study was to analyze the kinematic variables of Uchi-mata(inner thigh reaping throw) by Kumi-kata(engagement position, basic hold) types A, B in Judo with three dimensional analysis technique and show the kinematic characteristics of it. The subjects of the experiment were judokas who have been attending in Yong-in University(YIU), and Uchi-mata is their tokui-nage(favorite technique), the throwing form was filmed on 16mm video camera( 30frame/sec.) Kinematic variables were temporal, posture, and COG(Center of Gravity). The mean values and the standard deviation for each varibles were obtained and used as basic factors for examining characteristics of Uchi-mata by Kumi-kata types. The results of this analysis were as follows 1) Temporal variables The total time elapsed(TE) of Uchi-mata of types A, B were 1.45, 1.56 sec. respectively. Types A and B were not quite different on every phase. 2) Posture variables In performing of Uchi-mata, the range of flexion in type A, left elbow was 45?and B was 8 9?from Event 2(E2) to Event 6(E6). Type A and B were quite different in right elbow angle in Eventl(E1). Left shoulder angle of type A was extended and type B was flexed in E4. Both types right shoulder angles were showed similar pattern. Also both hip angles(right/left) were showed similar pattern. When type A performed Uchi-mata the knee-angle of supporting foot showed 142?in the 1st stage of kake phase[KP], and extended to 14T in the 2nd stage of KP. And the foot-ankle angle of supporting foot showed 83?in the 1st stage of KP, and extended to 86?in the 2nd stage of KP. moreover, The knee angle of attacking foot showed 12W in the 1st stage of KP, and extended to 132?in the 2nd stage of KP, and the foot-ankle angle of attacking foot showed 10 6?in the 1st stage of KP, and extended to 121?in the 2nd stage of KP. When type B performed Uchi-mata the knee-angle of supporting foot showed 144?in the 1st stage of KP, and extended to 154?in the 2nd stage of KP. And the foot-ankle angle of supporting foot showed 83?in the 1st stage of KP, and extended to 92?in the 2nd stage of KP. moreover, The knee angle of attacking foot showed 132?in the 1st stage of KP, and extended to 140?in the 2nd stage of KP, and the foot-ankle angle of attacking foot showed 103?in the 1st stage of KP, and extended to 115?in the 2nd stage of KP. So, in performing of types A, B, it showed that the type B extended more than type A, but the ankle angle of attacking foot showed dorsiflexion. 3) C. O. G. variables When the subjects performed Uchi-mata, COG of type A, B up and down in vertical aspect was 71cm, 73.8cm in height from the foot in the 2nd stage of KP. The COG of right and left in frontal aspect showed the large move from the left to the right on both types

태권도 대학선수들의 찍어차기에 대한 운동학적 특성 분석

김의환,윤상화,조동희,권문석 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.3

The purpose of this study was to analyze toe kinematic variables of Jigeochagi in Taekwando with three dimensional analysis technique and show the kinematic characteristics of it. The subjects of the experiment were Taekwondo players who have been attending in Yong-in university(YIU), and Jigeochagi is their favorite technique, the kicking form was filmed on 16㎜ video camera(30f/s). Kinematic variables were temporal, posture and angular velocity. The mean values were obtained and used as basic factors for examining characteristics of Jigeochagi in Taekwondo. The results of this analysis were as follows, 1. The total time elapsed(TE) of Jigeochagi were 1.45, 1.56 sec. 1ph was fastest in performance showing then 2ph, 3ph. 2. In performing of Jigeochagi, the ankle, knee angle of supporting foot and the ankle, knee angle of attacking foot flexed to MKA then extened to IMP 3. The ankle, knee, hip angular velocities of attacking foot showed negative value to TO and then positive value to MKA and then showed negative value to IMP.

短形導波管內의 연속 테이퍼에 依한 反射特性

洪義錫 光云大學校 1974 論文集 Vol.3 No.-

The tapered waveguide is regarded as a two-mode system, the modes being the forward and reverse waves. A reflection parameter can be defined, relating the amplitude of the reverse wave generated at a point in the taper to the amplitude of the forward wave at that point. The reflection parameter can be regarded as a coupling parameter between the two modes and coupled-mode theory can be used to obtain the overall reflection coefficient of the taper. A detailed analysis is given for the case of a homogeneously- filled tapered waveguide, with perfectly conducting walls, working in the dominant mode. The reflectionless tapers are constructed on theoretical back-grounds discussed in this thesis. The working freguency on design procedure is chosen 9 GHz. The measured results theoretical values are plotted on graph and compared with VSWR values of Linear tapers.

심재성 홍반성 루푸스 1예

이원석,송준영,김용대,박의수 啓明大學校 醫科大學 1988 계명의대학술지 Vol.7 No.2

We report a case of lupus erythematosus profundus in a 16-year old male. He had multiple pea-nut to bean sized subcutaneous nodules with dark brownish colored overlying skin was present on the upper arm, trunk & other systemic disease. Histologically, deep dermis & subcutaneous layer had dense patch lymphocytic infiltration and homogenized hyaline fat necrosis. Direct immunofluorescene studies showed IgM and C?? deposit on the vessel wall. We treated him with chloroquine and corticosteroid.

페넴계 항생제 faropenem의 주요 임상분리세균에 대한 항균력

김재석,심영숙,김의종 대한화학요법학회 2001 대한화학요법학회지 Vol.19 No.4

목적 : Faropenem에 대한 국내 임상 분리 균주의 감수성 여부를 파악하기 위하여 임상 환자에서 흔히 분리되는 통성 혐기성 세균을 대상으로 최소억제농도(MIC_)를 측정하였으며, 대조항생제로는 amoxicillin과 cefaclor를 사용하여 그 결과와 서로 비교하였다. 방법 : 시험 균종은 2000년과 2001년 서울대학교병원 임상병리과로 세균배양이 의뢰된 혈액, 객담, 소변 등 임상검체에서 분리된 균주로서 임상환자에서 흔히 분리되는 통성 혐기성 세균 총 523주를 대상으로 하였다. 미국 임상검사표준화협회(NCCLS)에서 권장하는 방법에 따라 S. pneumoniae를 제외한 모든 균종은 한천희석법으로 MIC를 측정하였으며, S. pneumoniae는 microdilution broth법으로 MIC를 측정하였다. 결과 : Faropenem의 MIC는 전반적으로 비교약제에 비해 전반적으로 낮았다. E. coli, K. pneumoniae에 대한 MIC_(90)는 각각 1㎍/mL, 2㎍/mL이었으며, E. aerogenes, C. freundii, M. morganii는 4㎍/mL, E. cloacae는 8㎍/mL의 결과를 보였다. S. marcescens, A. baumanni의 MIC_(90)은 16㎍/mL, 32㎍/mL를 보였으며, P. aeruginosa와 S. maltophilia에서는 64㎍/mL 이상으로서 항균력이 없었다. S. aureus와 S. epidermidis에서는 메티실린 내성인 경우는 MIC_(90)이 64㎍/mL이상, 8㎍/mL이었다. 메티실린 감수성인 경우 0.125㎍/mL와 0.125㎍/mL이었다. E. faecalis와 E. faecium의 경우 MIC_(90)은 모두 64㎍/mL 이상을 보였으나, E. faecalis의 경우 MIC_(90)이 1㎍/mL로서 항생제 내성인 균주가 일부 포함되어 MIC_(90)이 높아진 것으로 보인다. S. pneumoniae의 경우 MIC_(90)은 0.5㎍/mL이었다. 결론 : Faropenem은 E. coli, K. pneumoniae에 대해서도 우수한 항균력을 보였다. 대조항생제에 비해 faropenem의 Enterobacteriacae에 대한 항균력은 높았다. 앞으로 faropenem에 대한 추가 연구가 필요하며, 특히 경구용 제재로 사용할 경우 약력학적 연구가 필요할 것으로 생각한다. Background : Minimal inhibitory concentrations (MICs) of facultative anaerobic bacteria isolated from several kinds of specimens of patients were determined for the in vitro susceptibility against the new oral penem, faropenern and compared with MICs of amoxicillin and cefaclor in Korea. Methods : Total 523 strains isolated from blood, sputum, or urine of patients at Seoul National University Hospital in 2000 and 2001 were examined by agar dilution or microdilution broth method according to the recommendations of National Committee for Clinical Laboratory Standards. Results : In general, the MICs of faropenem against major clinical isolates were lower than those of amoxicillin and cefaclor. MIC data showed that faropenern was active against Escherichia coli (MIC_(90)= 1㎍/mL) and Klebsiella pneumoniae (MIC_(90) = 2㎍/mL). The MICwS of Enterobacter aerogenes, Citrobacter freundii, Morganella morganii were 4 ㎍/mL. The MIC_(90)s of Enterobacter cloacae, Serratia marcescens, and Acinetobacter baumannii were relatively raised, 8 ㎍/mL, 16 ㎍/mL, and 32 ㎍/mL, respectively. Faropenem was not active against P. aeniginosa and S. maltophilia (MIC≥64 ㎍/mL). Although for MRSA MICs were high (MIC_(90)>64 ㎍/mL) compared with those for MRSE (MIC_(90) = 8 ㎍/mL), faropenern was active against methicillin-susceptible staphylococci (MIC_(90) = 0.125 ug/nmL). For Enterococcus faecalis and Enterococcus faecium, the MIC_(90)s were > 64 ㎍/mL. However, MICs of E. faecalis (MIC_(90) = 1 ㎍/mL) seems to be overestimated by including some resistant strains. The MIC_(90) of faropenern against S. pneumoniae was 0.5 ㎍/mL Conclusions : Faropenem was more active against E. coli, K. pneumoniae, and S. pneumoniae than reference drugs. The in vitro activity of faropenern was in many cases superior to those of amoxicillin and cefaclor. Pharmacokinetic study is needed, especially for the use of faropenern as an oral drug.

HT-80鋼 熔接材의 熔接後熱處理時 作用應力이 疲勞龜裂進展擧動에 미치는 影響

羅義均,吳錫炯 군산대학교 1992 群山水産專門大學 硏究報告 Vol.26 No.1

This study was conducted to examine the effects of the applied stress during PWHT on fatigue crack growth behaviours for the weldment of HT -80 steel. Stress during PWHT was applied to the weld HAZ in order to simulate the residual stress at welds. Submerged arc welding was done. Fatigue test was done at the frequency of 30Hz. The obtained data were analyzed between stress intensity factor range and crack growth rate. The fractured surface was observed by SEM and optical microscope. Crack growth rate of as -weld was slower than that of parent because of the singularities at HAZ. Crack growth rate for the specimen subjected to stress of 98Mpa was the fastest among PWHT specimens due to the precipitation of carbides which was formed during PWHT.