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배영상,강정순 啓明大學校 生活科學硏究所 1997 科學論集 Vol.23 No.-
AbstractThe purpose of this study was examined the mechanical variations focusing on the jump for one foot landing an the jump for both feet landing in basic skills of the Korean dance, in order to reveal the reason of the knee and feet joint injury of the dancer. Subjects were 10 skilled and 10 unskilled. They jumped over the Force Plateform was used to examine the ground reaction force in jumping and landing. The following conclusions are supported by the findings of this study. In jumping for the both-feet and one-foot landing of skilled, the jump of the one-foot landing is significantly(p<.01) longer in the duration of take off and more lower in the height of jump than the jump for the both-feeg. The duration of take off for the both-feet and one-foot landing of skilled is almost same between both but in the duration of landing situation is significantly(p<.01) longer the one-foot landing. The both-feet landing is regardly (p<. 05) larger in the average force and power of landing situation. There are not the significant difference between the jump of the both-feet and one-foot landing in the duration of take off, the height of jump and the average force and power, which are appeared in the jump of unskilled. The both-feet landing is significantly bigger in the average power of landing situation in the both-feet and one-foot landing of unskilled.
이홍준,손일진,정은경,문경래,박상기,박영봉 조선대학교 1993 The Medical Journal of Chosun University Vol.18 No.2
The pimapty sella syndrome results from and extension of the subarachnoid space into and intrasellar position with subsequent remodeling of the sella turcica and flattening of the pituitary gland. We experienced a case of primary emty sella syndrome in a 14-year-old male patient who was hospitalized because of short stature and micropenis. The endocrinologic studies revealed growth hormone and gonadotropin hormone deficiencies. The magnetic resonance imaging showed sella turica filled with CSF and flattened pituitary glad. The patient was followed-up with growth hormone therapy and the result was favorable.
Implementation of Shape Detection System Using the Backpropagation Learning Algorithm
Jung, Jong-pil,Jung, Jin-yong,Jung, Chai-yeoung,Lee, Kee-jun,Jung, Kuk-young CHOSUN UNIVERSITY 1997 Basic Science and Engineering Vol.1 No.2
Though the loss and distortion of information is too much, man have an inferable ability which can lead the whole information, using the learned information in advance during the shape recognition steps. If you make the shape detection system using this principle, the shape detection system which is strong to the loss and distortion can be developed. Backpropagatio learning algorithm, the neural network learning method is used to embody this shape detection system in this paper. The purposed detectio system is an algorithm to detect the shape by matching the feature point extract in an image and the learned image in advance with the backpropagation algorithm. In order to verify the validity of the purposed detectio nsystem , comparing the detected result of Hough Transform about the damaged simple image, the damaged image including an external noises and the crossed image with that of the purposed detection system, the purposed detection system is the better than the Hough Transform using a feature point.
Han, Jung-A,Seo, Eun Yeoung,Kim, Hae Jin,Park, Su Jung,Yoo, Hae Young,Kim, Jin Young,Shin, Dong Min,Kim, Jin Kyoung,Zhang, Yin Hua,Kim, Sung Joon American Physiological Society 2013 American journal of physiology. Cell physiology Vol.304 No.1
<P>In contrast to the conventional belief that systemic arteries dilate under hypoxia, we found that α-adrenergic contraction of rat deep femoral artery (DFA) is largely augmented by hypoxia (HVC(DFA)) while hypoxia (3% Po(2)) alone had no effect. HVC(DFA) was consistently observed in both endothelium-intact and -denuded vessels with partial pretone by phenylephrine (PhE) or by other conditions (e.g., K(+) channel blocker). Patch-clamp study showed no change in the membrane conductance of DFA myocytes by hypoxia. The RhoA-kinase inhibitor Y27632 attenuated HVC(DFA). The nitric oxide synthase inhibitor [nitro-L-arginine methyl ester (L-NAME)] and soluble guanylate cyclase inhibitor [oxadiazole quinoxalin (ODQ)] strongly augmented the PhE-pretone, while neither of the agents had effect without pretone. NADPH oxidase type 4 (NOX4) inhibitors (diphenylene iodonium and plumbagin) also potentiated PhE-pretone, which was reversed by NO donor. No additive HVC(DFA) was observed under the pretreatment with L-NAME, ODQ, or plumbagin. Western blot and immunohistochemistry analysis showed that both NOX4 and endothelial nitric oxide synthase (eNOS) are expressed in smooth muscle layer of DFA. Various mitochondria inhibitors (rotenone, myxothiazol, and cyanide) prevented HVC(DFA). From the pharmacological data, as a mechanism for HVC(DFA), we suggest hypoxic inhibition of eNOS in myocytes. The putative role of NOX4 and mitochondria requires further investigation. The HVC(DFA) may prevent imbalance between cardiac output and skeletal blood flow under emergent hypoxia combined with increased sympathetic tone.</P>
Recurred intraosseous pleomorphic adenoma mimicking an odontogenic cyst
( Hee-yeoung Jung ),( Junyeong Lee ),( Dae-seung Yang ),( Jin-yong Cho ),( Jaeyoung Ryu ) 조선대학교 치의학연구원 2022 Oral Biology Research (Oral Biol Res) Vol.46 No.2
Pleomorphic adenoma is the most common tumor associated with the salivary gland. These tumors are derived from a mixture of ductal and myoepithelial elements and rarely develop in the jawbones. Regardless of the site of origin, pleomorphic adenoma presents as a painless, firm, and slow-growing mass, which is often misdiagnosed as an odontogenic cyst when located in the tooth-bearing areas of the jaws.
이신영 ( Shin Yeoung Lee ),김남희 ( Nam Hee Kim ),채현범 ( Hyun Beom Chae ),한기중 ( Ki Joong Han ),이태훈 ( Tae Hoon Lee ),장철민 ( Choel Min Jang ),유경모 ( Kyung Mo Yoo ),정윤숙 ( Yoon Suk Jung ),박정호 ( Jung Ho Park ),김홍주 대한소화기학회 2014 대한소화기학회지 Vol.64 No.1
목적: 대장내시경 검사의 질 관리에 전통적으로 사용되고 있는 선종 발견율과 임상적인 유의성이 높은 진행성 선종 발견율 간의 상관관계를 규명하고자 하였다. 대상 및 방법: 2009년부터 2010년까지 강북삼성병원에서 건강검진을 위해 대장내시경을 시행한 45세 이상, 75세 이하의 환자군을 대상으로 하였으며, 제외 기준으로는 연구 기간 중내시경 의사의 내시경 시행 횟수가 10회 이하인 경우, 이전 대장폴립의 병력이 있는 경우, 부적절한 장 정결도를 보인 경우로 하였고, 최종 561명의 환자를 대상으로 하였다. 진행성 선종과 관련된 변수에 대하여 독립표본 T검정 및 로지스틱 회귀분석을 사용하였고, 진행성 선종 발견율을 기준으로 내시경 의사군을 나누어 선종 발견율의 차이를 분석하였다. 또한 내시경 의사들의 선종 발견율과 진행성 선종 발견율을 변수로 Spearman``s rank order correlation을 사용하여 유의성을 검토하였다. 결과: 총 561명의 환자군 및 18명의 내시경 의사가 선정되었으며, 전체 의사군의 선종 발견율은 38.86%로 18명 중 17명이 20% 이상의 적절한 선종 발견율을 보였다. 전체 의사군의 진행성 선종 발견율은 4.46% 로 최소 0%에서 최대 14.29%의 변이를 보였으며, 내시경 의사의 시술 건수 500회를 기준으로 유의하게 증가하였다(1.51% vs. 5.56%, p=0.019). 진행성 선종은 로지스틱 회귀분석에서 연령(교차비 1.07; 95% CI 1.009-1.133, p=0.023) 및 회수시간과 양의 상관관계가 있었고(교차비 1.191; 95% CI 1.094-1.296, p<0.001), 성별은 유의한 차이가 없었다(교차비 1.860; 95% CI 0.764-4.529, p=0.171). 진행성 선종 발견율 5%를 기준으로 의사군을 나누었을 때, 진행성 선종 발견율이 5% 이상인 군의 선종 발견율은 46.77%로 진행성 선종 발견율이 5% 미만인 군의 선종발견율 34.72%에 비하여 유의하게 높았다(p=0.009). 내시경의사들의 선종 발견율과 진행성 선종 발견율을 변수로 하여 Spearman``s rank-order correlation을 이용하여 분석하였을때 Rho=0.463, p=0.053으로 두 값 사이의 유의성을 찾을 수 없었다. 결론: 이번 연구는 적절한 선종 발견율을 가진 의사라도 진행성 선종 발견율이 낮을 수 있음을 보여주었으며, 내시경 의사들의 진행성 선종 발견율과 선종 발견율 간의 연관성이 없어 현재 대장내시경의 질 지표로 사용되는 선종 발견율의 한계가 있음을 제시하였다. Background/Aims: Adenoma detection rate (ADR) is widely used as an index of colonoscopy quality management. Although advanced adenomas can be found less frequently than non-advanced adenomas, advanced adenomas have a higher clinical significance during screening for colorectal cancer. The aim of this study was to investigate the correlation between advanced and non-advanced ADR among colonoscopists. Methods: This study is an observational study of a cohort of patients undergoing screening colonoscopy between 2009 and 2010. We collected the data on patients` characteristics and colonoscopic findings. The detection rates of adenoma and advanced adenoma were calculated. Logistic regression was used to determine the effects of variables on advanced adenoma detection, and spearman`s rank-order correlation was used to evaluate the relationship between advanced ADR and ADR. Results: A total of 561 patients underwent screening colonoscopy by 18 experienced colonoscopists. Most colonoscopists had adequate (>20%) ADRs. Logistic regression showed that increased patient age (OR 1.07 per 1 year increase, 95% CI 1.009-1.133, p=0.023) and male gender (OR 1.860, 95% CI 0.764-4.529, p=0.171) were associated with advanced ADR. When colonoscopists were divided into two groups on the basis of advanced ADR of 5%, ADR was also significantly higher in the group having higher level of advanced ADR. However, there was no correlation between advanced ADR and ADR among colonoscopists as an individual. Conclusions: Colonoscopists` advanced ADRs were independent of their ADRs, indicating that advanced ADR could\ be quite low even among colonoscopists with acceptable ADRs. Thus, there seems to be a limitation in using ADR as an adequate index of colonoscopy quality management. (Korean J Gastroenterol 2014;64:18-23)