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Do Nam Binh,Ali Hussain,이희동,Ill-Whan Kim,김일원,태원필,이재신 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.57 No.41
The effects of Y doping on the crystal structure, and on the ferroelectric and the piezoelectric properties of Bi0.5(Na0.82K0.18)0.5TiO3 ceramics have been investigated. The Y doping induced a transition from a ferroelectric (FE) tetragonal to an electrostrcitive (ES) pseudocubic phase, leading to the degradations of the dielectric constant, loss tangent, the remnant polarization, coercive field, and piezoelectric coefficient d33. However, the electric-field-induced strain was significantly enhanced by the Y-doping-induced phase transition and reached the highest value of Smax/Emax = 278 pm/V when 0.7 wt% Y2O3 was doped. The abnormal enhancement in strain was attributed to the coexistence of FE and ES phases, which provided more degrees of freedom for domain reorientation under electric fields.
김일도(Ill-do Kim),백두권(Doo-kwon Baik),황종선(Jong-sun Hwang) 한국정보과학회 1991 한국정보과학회 학술발표논문집 Vol.18 No.2
기존의 개념적 데이타베이스 모델은 실세계의 다양한 측면을 나타낼 수 있는 표현력이 부족하고 계층성과 관계성을 체계적으로 표현하기가 부족하다. 따라서 객체에 대한 다양한 측면을 제공하고 시맨틱 개념을 확장하시킨 개념적 스키마의 모델인 MAOM(Multiple Aspects-based Object Model)의 스키마를 생성하기 위하여, 개념적 데이타베이스 설계 시스템 MACDS(Mutiple-Aspects Concaptual DB Design System)을 설계 하였다. MACDS의 특징은 사용자가 초보자 일지라도 쉽게 시스템과 대화식으로 절차에 따라 개념적 스키마 자동생성할 수 있는 도구와 스카마상에 변경연산을 정의하고 구현하였다.
김일도(Kim Ill Do),백두권(Baik Doo Kwon),황종선(Hwang Jong Sun) 한국정보과학회 1990 한국정보과학회 학술발표논문집 Vol.17 No.1
인공기능과 시뮬레이션에 대한 이해와 이들에 관련된 기법들에 있어서 많은 이론적인 발전이 있었다. 이러한 기법을 서로 간의 관계를 살펴보면, 시뮬레이션에 인공기능 기법을 이용함으로써 시뮬레이션 모델의 구축, 검증, 수행을 쉽게 할 수 있으며, 인공기능에 시뮬레이션을 도입하므로 인공지능에서 많은 제한성, 즉 증명 가능하지 못한 문제들을 검증할 수 있다. 본 연구는 인공지능과 시뮬레이션의 관계를 분류하고, 앞으로의 발전 방향을 제시 하였다.
김봉석(Bong Seog Kim),김서운(Seo Woon Kim),이영현(Young Hyun Lee),조희준(Hee Jun Cho),이춘택(Choon Taek Lee),도영수(Young Soo Do),김효윤(Hyo Youn Kim),조재일(Jae Ill Zo),심영목(Young Mog Shim),이진오(JIn Oh Lee),강태웅(Tae Woong Kang 대한내과학회 1994 대한내과학회지 Vol.46 No.4
Objective: For curative surgical treatment of esophageal cancer the resectability from the tracheobrochial tree would be the most important factor. Although CT scan has been used for the determination of the resectability of esophageal cancer, it has a limitation on the detection of esophageal cancer invasion to tracheobronchial tree We have performed flexible bronchoscopy in the patients with esophageal cancer to detect and classify the tracheobronchial tree alterations and to find the relation of bronchoscopic findings with the resectability. Method: From April 1990 to October 1992, 133 patients with esophageal cancer had received bronchoscopy. Bronchoscopic findings were classified into three groups: [Group I: normal, Group II: indirect effects (hyperemia and compression-mild, moderate, severe), group III: invasion). CT findings were a]so classified into three classes: [Class A: tumor separated from tracheobronehial tree, Class B: abutting tree, Class C: compressing tree]. We investigated the resectability of esophageal cancer according to bronchoscopic and CT findings. Results: 1) Among 133 patients, the bronchscopic findings were Group I in 41(30.8%), Group II in 66(49.6%), and Group III in 26(19.6%) patients. 2) Abnormal bronchoscopic findings were mainly found in trachea and left main bronchus and frequently found in upper and middle esophageal cancer patients, 3) The resection rate from tracheobronchial tree was 96.8% in group I and 75% in group II bronchoscopic finding. 4) The resections from tracheobronchial tree could be performed in 94.6% of Class A, in 70% of Class B and in 53.8% of Class C of CT scan patients. 5) Six of twelve unresectable patients belonged to Class C of CT scan finding If we excluded Class C in Group II patients, resectability would be increased to 87.5%. Conclusion: We could recommend the operation in esophgeal cancer patients with Group I and minimal Group II bronchoscopic finding. In advanced Group II and/or Class C of CT scan patients, neoadjuvant treatment and reevaluation could be recommended.
자궁경부의 정상 및 종양 조직에서 EGF, TGF-α와 EGFR의 발현
이방현(Bang Hyun Lee),권동진(Dong Jin Kwon),김찬주(Chan Joo Kim),권용일(Yong Ill Kwon),박태철(Tae Chul Park),김진홍(Jin Hong Kim),이진우(Jin Woo Lee),김도강(Do Kang Kim),남궁성은(Sung Eun Namkoong) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.2
Objective : This study seeks to define the expression of epidermal growth factor(EGF) and transforming growth factor(TGF)-α and epidermal growth factor receptor(EGFR), and the relationship to the tumor progression of human cervical epithelial neoplasia. Methods : To confirm the expression of EGF, TGF-α and EGFR immunohistochemically in normal cervix, cervical intraepithelial neoplasms and cervical carcinomas, we used monoclonal antibodies to EGF, TGF-α and EGFR. Results : Immunohistochemical stainings using anti-EGF, anti-TGF-α and anti-EGFR antibodies showed weak or moderate stainings in all cases. Normal and CIN cases showed predominantly basal and parabasal expression of EGF, TGF-α and EGFR, and its expression decreased as the cells became increasingly differentiated toward the surface of the epithelium. In the cervical carcinoma EGF and TGF-α expressed weakly to moderately focally, and EGFR expressed intensely in all malignant cells. Conclusion : These results suggest that EGF, TGF-α and EGFR may involved in cellular proliferation of cervical squamous epithelium and have a significant role in the progression of cervical cancer.
Cloning and Expression of Protein-arginine Methyltransferase Ⅰ
Hong, Kyeong-Man,Choi, Yong-Bock,Chang, Yoo-Jung,Kim, Han-Soo,Lee, Sang-Do,Pak, Gun-Suk,Kim, Jeong-Kyu,Rhee, Kang-Ill,Park, Hyun,Kim, Kyung-Suk,Park, Moon-Kee 圓光大學校 醫科學硏究所 1999 圓光醫科學 Vol.15 No.2
Purpose: PRMT I gene was cloned recently, but the biological function of these enzymes has not been clear yet. This study was designed to produce recombinant PRMT1 in Escherichia coli for the future production of monoclonal antibody. Methods: Partial human PRMT1 cDNA was amplified by PCR from human placental cDNA library. The hPRMT1 was cloned to T-vector, again to Trx fusion vector for expression. The transformed bacteria with Trx-hPRMT1 vector were induced. The induced fusion protein was purified with His-bind chromatography and was digested with recombinant enterokinase. Digested proteins were passed through His-bind column to remove TrxA protein. Results: The recombinant fusion protein, Trx-hPRMT1, was expressed in E.coli. And the pure recombinant hPRMT1 was purified from His-bind chromatography and the digestion with enterokinase. Conclusions: The purified recombinant hPRMT1 protein was adequate to use for the ^production of monoclonal antibody.