동적 그룹에 적합한 안전하고 효율적인 그룹키 동의 프로토콜

김기성(Kim Ki Sung),김정윤(Kim Jung Yoon),최형기(Choi Hyoung Kee) 한국통신학회 2008 한국통신학회 학술대회논문집 Vol.2008 No.7

Rare Earth Oxalate Hydrate의 構造變化에 關한 硏究(Ⅱ)

丁學鎭,丁梧鎭,宋基東 조선대학교 기초과학연구소 1984 自然科學硏究 Vol.7 No.1

희토류 옥살산 수화물 및 각 전이점 이후까지 가열하여 얻은 옥살산 시료들의 구조를 원소분석치, 시차열분석법, 열중량분석법, X선회절법 및 전자현미경법으로 연구하였다. 각 희토류는 옥살산 수화물 시료들은 공기중에서 293∼427℃ 사이에서 완전탈수 되어 단사정계 결정에서 무정형의 무수염으로 변한다. 이들 무수물은 346∼698℃ 사이에서 R_2O_2CO_3로 상변화가 생기며 720∼885℃에서 희토류 산화물로 분해된다. 각 희토류 옥살산 수화물의 전이온도와 희토류원소의 원자번호와는 아무런 관계가 없었다. The rare earth oxalate hydrates were synthesized by precipitation method at room temperature. These have the general formula, R_2(C_2O_4)_3. XH_2O. The structures of the hydrates and compounds ignited at each transition temperature have been investigated by analytical data of carbon and hydrogen, differential thermal analysis(DTA), thermogravimetric analysis (TGA) and X-ray diffraction method. The TGA results were similar to all the lanthanides and the DTA results were almost entirely different according to the heating conditions. The lanthanide hydrates lost water in air at the range of 200∼347℃ and monoclinic crystal became the stable anhydrous salt. These anhydrous salts were decomposed into R_2O_2CO_3 at the range of 380∼600℃. The rare earth oxycarbonates have begun to decompose into the rare earth oxide at 600∼885℃. We found that atomic numbers of rare earth elements were not related with each transitional temperatures.

毛髮 및 爪甲의 성장에 따른 단백성분의 산화

정영도,최기오,양성렬,이춘기,안봉환,이민화 한국노화학회 1992 한국노화학회지 Vol.2 No.1

성상세포종에서 등급에 따른 p53 단백 발현의 차이

기근홍,양정원,이승학,이민오,성정희 조선대학교 2001 The Medical Journal of Chosun University Vol.26 No.1

Background and Objectives: Mutation or inactivation of the p53 is important mechanism in a wide variety of human tumors. The purpose of this study is to investigate the relationship between expression amount of p53 protein and the grade of astrocytic gliomas. Materials and Methods: This study analyzes 40 paraffin-embedded astrocytic glioma, including 10 cases of low grade, 20 cases of high grade, and 10 cases of maligant glioma (glioblastoma multiforme) were used to analyze the status of abnormal accumulation of wild type of p53 protein. The evaluation of the immunostaining result was based on the percentage of positive neoplastic cells. Results: Average positive cell rate of p53 protein were 4.2%, 35.4% and 16.2% in low grade astrocytoma, high grade astrocytoma and glioblastoma multiforme, respectively. Conclusion: p53 gene mutations were correlated with histologic grade of glial tumors. High grade and glioblastoma multiforme showed higher positive cell rate than low grade astrocytoma. These results suggest that the high positive rates of p53 protein is related to the poor prognosis.

재생불량성빈혈로 오인될 정도로 심한 범혈구감소증을 동반한 폐결핵 1예 (증례)

정기명 외 중앙대학교 의과대학 의학연구소 2007 中央醫大誌 Vol.32 No.1/2

Prevalence rate of pulmonary tuberculosis has been decreasing in Korea. But, newly diagnosed pulmonary tuberculosis in young people is increasing nowadays in Korea. Therefore diagnosis and treatment of tuberculosis are very important in Korea. Pancytopenia is one of the characteristics of hematological changes in tuberculosis. Authors experienced a rare case of pancytopenia associated with pulmonary tuberculosis in a young female. In this case, the clinical features and initial laboratory data looked like aplastic anemia. The bone marrow examination showed hypocellularity which looked like aplastic anemia. But, after the beginning of anti-tuberculosis chemotherapy and active supportive care, clinical symptoms and signs improved and the pancytopenia resolved. Tuberculosis is a common infection in Korea. Therefore, when pancytopenia is present, together with hepatopathy and pyrexia, tuberculosis should always be considered.

시각적 관찰훈련이 철봉 차오르기 동작 과제의 탐색능력 제고에 미치는 영향

정구인,최덕묵,김기범 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.4

The study aims to identify the difference in the effect of the learner's observation ability improvement presuming the qualified companion's feed back. The subject of the study was 77 male student not having experience of kicking up with the horizontalbar which is the theme of the study among 99 students in the regular gymnastics classes of D and K universities. 77 subjects were grouped to be the controlled group of 40 and the test group of 37. The study compares and analyzes the data from the post test based on the pre test data making as the baseline data. the data collected was went through the t-test with SPSS/PC +9.0 version, the lower program for personal computer and the significance level was set to p<.05. the results of the pre and post test onthe kicking up assignment performance and when compares the detection ability after the practicing of the visual observational training, it shows much significant difference between two groups (p<.001). when compared the pre test (11.63±2.96) of the controlled to the post test (14.03±3.60) of the controlled, became to be t=-6.283 and showed statistically significant, which considered to be the results of those from that the instructors verbal feed back in the assignment performance per steps in every classof the kicking up assignment and from that the detection ability could be improved between the companions by comparing mutual attitudes and from the efforts of the learner himself to train till the end of the class. By these results one can find that the detect error rating is with high difference at the post test rather that at the pre test in both of the controlled group and the test group. Especially, the test group of its post test mean is with remarkably high detect error rating than the controlled group.

역전파알고리즘 기반 자율주행로봇의 지역경로계획설계

정헌,박경석,이경웅,박기두,최한수 조선대학교 전자정보통신연구소 2002 電子情報通信硏究所論文誌 Vol.5 No.2

The research about the AMR has been progressed, which can bridge a disadvantage that a robot performs under a position unmoved. The AMR-Research constitutes skelton, path planning, AMRcontrol, sensor fusion and obstacle avoidance etc... The path planning of autonomous mobile robot use two method. One is global path planning and another is local path planning. In this paper, we study the local path planning of autonomous mobile robot move in unknown enviroment. This local path planning is based on neural network using the direction indicator rules learning. Also the system is made up of sensor system. The experimental results show that the developed direction indicator system operates properly and strongly at circumstance

LP-MOCVD 방법으로 성장한 InGa As/GaAs의 DCXD에 의한 조성과 임계두께에 관한 연구

정양준,차상석,임기영 木浦大學校 基礎科學硏究所 1994 基礎科學硏究誌 Vol.12 No.-

We have grown InGaAs single layers on GaAs by LP-MOCVD(Low Pressure Metal-Organic Chemical Vapor Deposition) method. We have investigated the lattice constants, strain relaxation, and critical layer thickness of a ?? layer by double crystal x-ray diffraction. The correlation between the In composition in epitaxial ?? and In gas composition was determined by rocking curve analyses. The critical layer thickness and In composition were determined to be 600Å for 0.115 and 400 Å for 0.183, respectively, assuming that the In gas compositions are 0.150 and 0.243. Beyond the critical layer thickness the transition from the strained to the relaxed state occurs more rapidly as the thickness increases.

한국인의 하악 구치의 근관 형태에 관한 후향성 연구

정일영,금기연,이승종,이찬영 大韓齒科保存學會 1997 Restorative Dentistry & Endodontics Vol.22 No.2

A retrospective in vivo study of endodontically treated mandiblar molars was conducted. The radilographs and clinical records of mandibular molars that had been treated endodontically in the Dental hospital of Yonsei University from 1986 to July 1997 were reviewed and categorized. A total of 1751 cases were studied and following results were obtained. 1. The number of root canals in mandibular first permanent molar in d Korean population revealed three in 53.2%, four in 23.0%, two in 18.4%, C-shaped canal in 5.0%, and one in 0.4%. 2. In mandibular second molar, three canals was observed in 53.3%, four in 22.2%, two in 14.9%, C-shaped canal in 9.1%, and one in 0.6%. 3. In the results of the percentage of 4 canals of mandibular first molars at various age, before age 20, 37.7% was obtained whereas 19.3% after 30. 4. 7.94% of mandibular first molars examined were found to have three roots. 5. The mandibular second molar had C-shaped canals in 9.1%.

전립샘에 발생한 원발성 악성 림프종

기근홍,정유경,심재영 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.3

Primary malignant lymphoma of the prostate is extremely rare. This tumor should be rule out infiltration of lymphoma arising in the other site. We experience a case of diffuse large B-cell type of primary prostatic malignant lymphoma in an 70 year-old male. There is no extra-prostatic involvement III extensive staging work-up. Transrectal prostatic needle biopsy was performed. On microscopic examination, the atypical lymphocytes were diffusely infiltrated and replaced of the prostatic parenchyme. The atypical lymphocytes had scant cytoplasm and large nucleus with irregualr nuclear chromatin. Nucleoli were not distinct. Immunohistochernically, the tumor cells were reactive for LCA, CD20 and kappa light chain, but not reactive for CD3, UCHL-1 and Bcl-2. Histopathologic diagnosis is diffuse large B-cell lymphoma of the prostate.