Geotextile Filter의 특수성능 분석

權武南,李相昊,金勝勳 慶北大學校 1992 論文集 Vol.52 No.-

In order to lock stability of geotextile filer to clogging or blocking, small scale laboratory tests were accomplished, considering to drainage conditions, on domestic and foreign nonwoven geotextile products used for filter, and permeable capacity of the geotextile filter was analyzed. The results obtained are as follows: 1. The permeable flow rate through the geotextile filter appears to be decrease remarkably in the initial stage of duration time but gradually afterward and is stabilized at 300 hours∼400 hours of duration time. 2. The increase ratio of permeable flow rate through the geotextile filter due to rising hydraulic head appears to be higher with protected soil having lower comparative content of fine particles, and the effect of rising hydraulic head finds to be higher with that protected soil. 3. The permeable flow rate through the geotextile filter appears to be higher with protected soil having lower content of fine particles and the increase of it trends to be considerable and to be decrease according to the elapse of time. From the fact, the flow rate finds to be more influenced by clogging or blocking with protected soil layer having lower content of fine particles. 4. It seems generally that the thicker the geotextile filter is, the higher the permeable flow rate is, but the decrease ratio of it in the initial stage finds to be lower in the case of thicker geotextile.

암호시스템의 효율적인 키 관리에 관한 연구

권승학,정연호 청주대학교 산업과학연구소 1994 産業科學硏究 Vol.12 No.-

For the effective management and protection of information, we have to discriminate whether the information was illegally changed or not, in order to keep a secret. And the peace-preservation service, such as digital signature which is genernal used in the use for the denial prevention of sender/receiver fact is required. To support the safe service, the methed of distributing key is an important task, which is to setlle the problem of supervising the key in the system of the code. This thesis is aimed at presenting the measures to establish the effective system of supervising the key by using the public one-way Hash fuction which solves the problems in the public key-system.

Adriamycin및 Epiadriamycin투여가 Mouse심장근의 Mg++-ATPase활성에 미치는 영향에 관한연구

권익승,이군자,정호삼,이규식 한양대학교 의과대학 1988 한양의대 학술지 Vol.8 No.2

Adriamycin and epiadriamycin are anthracyclin antibiotics and epiadriamycin has a different configuration of the -OH group in in the C-4 positive (equatorial configuration) of the aminosugar moiety of the adriamycin. The antibiotics inhibit the DNA synthesis by intercalating between strands of the DNA double helix and they have been widely used as anticancer drugs in the treatment of sarcoma, leukemia, and solid tumor. Adriamycin and epiadriamycin have little specificity toward the normal and tumor cells, cytotoxicity of the normal cells being observed during the drug therapy. Therefore the author undertook the present study to pursue the effect of adriamycin and epiadriamycin on mitochondria of the cardiac muscle cell. Albino mice, ICR strain, weighing 20gm were used as an experimental animals. The experimental animals were killed 12, 24, 48 and 72 hours after administration of 30mg/kg of adriamycin and 36mg/kg of epiadriamycin, respectively. The specimens obtained from left ventricle of the heart were prepared and processed by Wachstein's method for detecting ??-ATPase activity in the mitochondria. The results obtained were as follows: 1. The ??-ATPase activity in left ventricular cardiac muscle cells was strongly positive in the 12-hour adriamycin treated group and decreased with time, exhibiting only trace activity in the 72-hour adriamycin treated group. 2. The ??-ATPase activity in left ventricular cardiac muscle cells was strongly positive in the 12-hour epiadriamycine treated group and weakly positive in the 72-hour epiadriamycin treated group. Consequently it is suggested that adriamycin and epiadriamycin inhibit ??-ATPase activity showing cardiotoxic effect of the drug.

사이버 가정학습체제 구축 모형 개발

권성호,최인호,심현애,이승진,김경현,장상현 한국교육정보미디어학회 2003 교육정보미디어연구 Vol.9 No.4

본 연구는 초·중등 사이버 가정학습체제의 구축 모형 개발을 목적으로 한다. 이를 위해 첫째, 사교육비 관련 현황 및 우리나라의 사회·현실적 요구를 분석하고, 둘째, 사이버 공간에서의 학습을 지원하는 학습이론을 탐색하여 얻은 시사점을 바탕으로 사이버 가정학습체제 개발 원리를 도출하였으며, 셋째, 학습이론적 적용의 틀을 기반으로 사이버 가정학습체제 구축 모형을 개발하고, 각 모형에 대한 세부적인 설명과 시행 시 고려해야 할 사항을 제시하였다. 사이버 가정학습체제 구축 모형은 체제 구성요소와 각 요소들 간의 관계를 도식화한 체제 구성도를 바탕으로 사이버 가정학습체제를 운영하는 활동 주체들의 역할을 정의한 운영 모형, 사이버 가정학습체제 내에서의 학습 유형과 흐름을 보여주는 학습 모형, 사이버 가정학습체제 내 학습 콘텐츠의 구성 기준을 제시하는 콘텐츠 모형 그리고 사이버 가정학습체제 내에서의 학습에 대한 학업성취도 평가와 체제 평가를 위한 평가 모형으로 구성되었다. 각 유형별 모형은 필요에 따라 하위 모형으로 분류되어 총 17개의 사이버 가정학습체제 모형을 제시하였다. 또한 사이버 가정학습체제가 사교육비 절감과 공교육 지원이라는 궁극적인 목적을 달성하기 위해 고려되어야 할 시사점으로 환경자원, 학습자원, 인적자원, 홍보 마케팅 등의 네 가지 측면으로 나누어 제시하였다. The study is purposed to develop a set of construction models for Cyber Home Study System(CHSS) to support the students' self study through internet at the level of elementary, middle and high school students. This is intended to reduce the over spending of the private educational payment, causing the social conflict and antagonism in Korea, and finally to support the public education. The study problems are as follows: 1. Analysis on the social and authentic needs for reducing the private educational payment which causes the social conflict and antagonism in Korea. 2. Setting up the principles to develop the construction model for CHSS to apply the learning theories in support of the learning in the cyber space. 3. Development of a set of construction models for development and construction for CHSS, based on the theoretical developmental principles. The construction model for CHSS developed in this study contains a systemic diagram of the whole CHSS, and 4 major models: a model for management, the model for learning process, the model for content design, and the model for evaluation. The systemic diagram for CHSS demonstrates various components, which consist of the whole system, and the relationship among the components. The model of management identifies the role of each organization by which the CHSS is operated. The Learning process model is classified with 9 sub-models converging on the three factors. These factors are the learner subject, the existence of tutor support, and the relationship to the local school. The models for content design proposes the guideline for design and production of learning content. The evaluation model is composed of three sub models: evaluation for individual learning achievement, evaluation for learning achievement of the tutor supported calss members, and the system evaluation. Finally, 4 kinds of suggestions is suggested to accomplish the purpose of CHSS in terms of environmental resources, learning resources, man power, and advertising and marketing strategies.

Thiamine결핍 유도후 쥐 전뇌의 성상교세포 Glial Fibrillary Acidic Protein(GFAP) 면역화학 활성도에 대한 변화

김승현,김희태,김주한,김명호,황세진,김명권,백태경 대한신경과학회 1999 대한신경과학회지 Vol.17 No.1

흉막삼출의 유무에 따른 쯔쯔가무시증 환자간의 비교

권세훈,김형호,강지인,하재하,한경택,이재록,김동민,권용은,윤성호,이승일 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.1

Scrub typhus is a potentially fatal infectious disease caused by the organism Orientia tsutsugamushi. Clinical manifestations are fever, skin rash, eschar and varying degree of respiratory distress. The pleural effusion in scrub typhus is rare and secondary to the destruction of vascular endothelium. Because the respiratory symptoms are generally mild and the pleural effusion in scmb typhus is rare than in interstitial pneumonia, there are few comments about the characteristics of scmb typhus with pleural effusion. So we made the comparative study of scmb typhus patients between with pleural effusion and without pleural effusion. 연구배경 치명적일 수 있는 감염질환 중 하나인 쯔쯔가무시중(Scrub typhus)에서 드문 흉막삼출을 동반한 환자에 대한 고찰은 다른 문헌에서도 자주 언급되지 않았다. 따라서 본 저자들은 흉막삼출이 있는 경우와 없는 경우에 따른 쯔쯔가무시중 환자들을 비교하고자 하였다. 방법 2003년에서 2006년까지 조선대학교 병원 내과에 입원중인 환자 중 쯔쯔가무시중 진단을 받은 총 109명의 환자를 대상으로 하여 흉부 X선 검사 및 혈청학적 검사(CPK, LDH, ESR, CRP, AST, ALT, ADA), 혈액학적 검사(WBC, PLT) 및 백분율 검사등을 실시하였다. 결과 흉막삼출이 있는 환자들의 경우 흉막 삼출이 없는 환자들에 비해 ESR 수치가 통계학적으로 의의있게 높았다(p-vaule < 0.05). 결론 흉막삼출 유무에 따른 쯔쯔가무시중 환자간의 비교에 있어 ESR 수치가 통계학적인 의의를 가졌다.

외부 프리스트레스 도입에 의한 노후된 콘크리트 거더교의 보강성능평가

박승범,홍석주,이봉춘,장석호,권혁준 충남대학교 산업기술연구소 2000 산업기술연구논문집 Vol.15 No.1

One of the promising methods to enhance the flexural strength of a externally prestressed girder is to place the tendons with large eccentricities. The analysis and design of composite girders prestressed by external tendons involve difficulties related mainly to the position of anchorages and the construction sequences. This study was conducted on the concrete bridges reinforced by the continuous girders and the external prestressing. The test results in this study showed that the external prestressing of a composite girder increased the range of the elastic behavior, reduced deflections, increased ultimate strength, and added to the redundancy by providing the multiple stress paths.

전방 불안정성 견관절에서 이두박근의 근전도 활동성

김승호,하권익,김현숙,김선우,박종혁,김영민 대한견.주관절학회 2000 大韓肩.주關節學會誌 Vol.3 No.2

견관절 재발성 탈구에서 관절경적 견관절 전방 고정술의 결과 : 2년에서 6년간의 추시 관찰 Two to Six-Year Follow-up

김승호,하권익,노규철,류병담,오일빈 대한스포츠의학회 2003 대한스포츠의학회지 Vol.21 No.1

The purposes of this study were to prospectively evaluate the surgical otucome of the arthroscopic repair of the capsulolabral lesion using suture anchors in al large series of patients who were followed-up for mid-term periods. We evaluated 167 patients with traumatic recurrent anterior shoulder instability after an arthroscopic Bankart repair using suture anchors and nonabsorbable sutures. The mean age at the time of the operation was 25 years (15~46 years). There were 149 male and 18 female patients. Preoperatively and at the time of follow-up(mean, 44 months; range, 24~75 months), three objective outcome measurement tools(Rowe Score, University of California at Los Angeles Shoulder rating scale, and American Shoulder and Elbow Surgeons score) and two subjective measurements(pain and function visual analogue scale) sere assessed. The recurrence rate, range-of-motion, and risk factor for postoperative recurrence were evaluated. All shoulder scores improved after surgery(t-test, p<0.05). According to the Rowe scale, One hundred and thirty patients(78%) showed excellent, 29(17%) good, 6(4%) fair, and 2(2%) poor scored. Overall, postoperative recurrence of the instability was 4%(1 dislocation, 2 subluxation, and 4 positive anterior apprehensions). Postoperative recurrence was related with the glenoid defect of greater than 30%(Gehan's test, p<0.0001). In patients with postoperative instability, the recurrent episode was less frequent and shoulder function was related with the activity were increased after the surgery(t-test, p<0.001). One hundred and fifty-two patients(91%) returned to more than 90%of previous activities. The mean loss of external rotation was 2.0±4.0℃. In contrast to the previous reports on the results of the arthroscopic repair, arthroscopic capsulolabral repair using suture anchors provided satisfactory outcomes in terms of the recurrence, activity, and range of motion.

고등학생의 여가활동 참여와 사회성 발달에 관한 연구

현승권,고천호 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

The purpose of this study was to investigate the relationships between participation in leisure activities and social development, that is, participation in leisure activities related to personal characters and the relationships between participation in leisure activities and social development. TO accomplish the purpose of this study, research models and hypotheses were established based on previous studies and theories. Gender and grade as personal characters, participation in leisure activities as a independent variable and social development as a dependent variable were selected. Total of 570 student who go to High school in kyeon GI-do, moon-san 2004 were selected as subjects with random sampling. The questionnaire used in this study was based on the material which was made by Chung bung-Mo(1971) and was standardized by Han Tae-Ryoung(1998) Frequency analysis, cross analysis, ANOVA and t-test were used in this study and each hypothesis was tested at the significance level of .05. On the basis of the results analyzed, the Conclusion were drawn as follows ; First, there was a difference of participation in leisure activities depending on gender of High school students, but no difference was found depending on grades Second, there was a significant difference of social development in emotional stability, dominance and self-regulation according to types of participation in leisure activities of High school students. Third, No significant difference of social development was found in both frequency and period according to an extent of participation in leisure activities of High school students. Fourth, there was a difference in only activities depending on existence of a leader and there was significant difference in activity and sociability depending on existence of a colleague.