정신분열병의 임상적 고위험군의 특징 : '서울청년클리닉'의 자연 추적 관찰 예비연구

유소영,이경진,강도형,이승재,하태현,위휘,이애라,송지연,김성년,권준수 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.1

Objectives : The aims of this study were to identify the intake and following process for subjects at high risk of transition to schizophrenia and to examine the neurocognitive, social, and emotional functions of the subjects compared with healthy controls. Methods : Symptomatic individuals judged at high risk for schizophrenia ('clinical high risk') within Youth Clinic were assessed and followed up. They performed a neurocognitive function test, a social function test and an affective function test. Twenty healthy controls were recruited in this study. Results : Among eighty-two subjects contacted through the Youth clinic, sixteen subjects were judged as the clinical high risk group. Fourteen subjects among the clinical high risk group showed deficits in several domains of neurocognitive functions, such as visual recall memory, verbal short term memory and executive function. Social and affective functions are also impaired in the Cli-nical high risk group compared with healthy controls. Two of 15 subjects (13%) developed a psychotic disorder within 6 months. Conclusion : This study illustrates the state of follow-up study for a clinical high risk group. Despite low numbers and short durations, some impairment of several functions in the clinical high risk group suggests possible predictors of psychosis.

Poly(ρ-phenylenesulfide)와 Poly(ρ-phenylene)으로부터 제조된 탄소의 리튬 이온 2차전지 anode 재료로서의 전기화학적 특성

유덕영,이주성,박수길,변지형,류신환,정윤이 한양대학교 에너지·환경기술연구소 1998 에너지·環境技術論文集 Vol.4 No.-

Poly(p-phenylenesulfide)와 poly(p-phenylene)으로부터 제조된 탄소를 리튬이온 2차전지용 음극재료로 사용하여 전기화학적특성을 연구하였다. 이들 고분자들을 질소 분위기하에서 승온속도 2℃/min로 1000℃까지 상승시킨 후, 1시간 동안 탄화시켜 탄소를 제조하였다. Poly(p-phenylene)으로부터 제조된 탄소가 보다 더 규칙적인 구조를 가지기 때문에 Poly(p-phenylenesulfide)으로부터 제조된 탄소보다 더 많은 용량과 충방전 효율을 나타내었다. 수산화리튬과 염화주석(Ⅱ)을 첨가하여 용량의 증가와 충방전 효율의 증가를 가져올 수 있었다. 이중에서 poly(p-phenylene)에 염화주석(Ⅱ)을 첨가시켜 제조된 탄소가 가장 큰 충방전 용량과 충방전 효율의 향상을 가져왔다. Carbon inaterials manufactured from poly(p-phenylene sulfide) and poly(p-phenylene), were studied on electrochemical characteristics as anode materials for lithium ion secondary battery. These polymer precursors were heat treated for 1hr at 1000℃ with the rate 2℃/min under nitrogen atmosphere. Carbon manufactured from poly(p-phenylene) showed higher capacity and coulomb efficiency of charge/discharge than carbon from poly(p-phenylene sulfide) because the former has better ordered structure. Carbon manufactured from polymer precursors adding stannous chloride or lithium hydroxide showed higher capacity and better efficiency of charge/discharge. Also, carbon manufactured by adding stannous chloride to poly(p-phenylene) showed the highest capacity and efficiency of charge/discharge.

리튬 이온 2차전지용 Anode 재료의 제조와 그 특성 고찰

이주성,정윤이,변지형,박은성,유덕영 한양대학교 에너지·환경기술연구소 1997 에너지·環境技術論文集 Vol.3 No.-

Carbon materials, disordered carbon and KS6(graphite, Lonza), were studied as anode materials of lithium ion secondary battery. The disordered carbons were made from thermosetting resins (phenol resin, furan resin, acetylene resin and its mixed resin). The resins were carbonized in nitrogen gas at 1000℃. When the thermosetting resins were carbonized, an addition of lithium hydroxide improved capacity and cycle life, but decreased the efficiency of the first charge/discharge. Also, in this study, the capacity of the carbon from phenol resin was higher than that of the carbon from acetylene resin or furan resin. But, the carbon from mixed resin was the highest capacity of all the synthetic carbons.

부산·울산·경남지역 직업병 감시체계

김정일,김병권,김정원,채창호,이철호,강동묵,김지홍,김진하,김영욱,이영하,이지호,김정호,윤형렬,유철인,정백근,장태원,김운규,윤동영,강진욱,김종은,안진홍,이동준,장준호,이광영,송혜란,최영희,이용환,조병만,최홍렬,고상백,김은아,이유진,홍영습,정갑열,김정만,김준연 大韓産業醫學會 2004 대한직업환경의학회지 Vol.16 No.1

Objective: Occupational medicine specialists in the Busan, Ulsan and Kyung-Nam areas established an area-based occupational disease surveillance system and used this system to collected case information for the purpose of preventing occupational diseases Methods: l l hospital participated in this system. The authors selected five main diseases, which were hand-arm vibration syndrome (HAVS), work-related musculoskeletal disorder (WRMSD), occupational asthma, occupational skin disease and occupational and occupational lung cancer and established their case definitions. All cases were reported on the web, and real time analysis was conducted. Results: Between April 2001 and April 2003, 192 cases of HAVS, 118 cases of WRMSD, 33 cases of occupational asthma, 17 cases of occupational skin disease and 17 cases of occupational lung cancer (for a total of 377 cases of these five main diseases) were reported. most of the HAVS cases came from shipbuilding, and 172 of them (92.7%) were associated with grinding. Of the four main types of WRMSD, carpal tunnel syndrome (CTS) was the most prevalent with 46 cases and shipbuilding was also the main industry involved (83.9%). The ergonomic risk factors involved mainly associated with the hand. In 19 (57.6%) and 4 (12.1%) cases of occupational asthma, the agents involved. The causative agents of occupational lung cancer included Cr, welding fume, PAH, Ni, etc. 10(58.8%) of the cases were diagnosed as squamous cell carcinoma and 5(29.4%) as adenoma. Conclusion: This result showed that an area-based occupational disease surveillance system might provide an effective method of evaluating the prevalence of such diseases, however the Busan, Ulsan and Kyung-Nam provinces are too large to be treated as individual areas. Therefore, the authors suggest that each province should establish its own surveillance system.

Oral Presentation : Decision making in root coverage using subepithlial connective tissue graft or pedicle flap

( Ji Young Yoo ),( Bong Jin Kim ),( Seong Nyum Jeong ),( Yun Sang Kim ),( Sung Hee Pi ),( Hyung Keun You ),( Hyung Shik Shin ) 대한치주과학회 2009 대한치주과학회 학술대회자료집 Vol.2009 No.2

The prognostic role of metabolic tumor volume at initial diagnosis in PET CT imaging in patients with Large cell Lung cancer

( Ji Hyung Hong ),( Sarah Park ),( Eun Ji Han ),( Ie Ryung Yoo ) 대한내과학회 2011 대한내과학회 추계학술대회 Vol.2011 No.-

Porcelain repair - Influence of different systems and surface treatments on resin bond strength

Ji-Young Yoo,Hyung-In Yoon,Ji-Man Park,Eun-Jin Park 대한치과보철학회 2015 The Journal of Advanced Prosthodontics Vol.7 No.5

PURPOSE. The purpose of this study was to evaluate the bond strength of composite resin on the fracture surface of metal-ceramic depending on the repair systems and surface roughening methods. MATERIALS AND METHODS. A total of 30 disk specimens were fabricated, 15 of each were made from feldspathic porcelain and nickel-chromium base metal alloy. Each substrate was divided into three groups according to the repair method: a) application of repair system I (Intraoral Repair Kit) with diamond bur roughening (Group DP and DM), b) application of repair system I with airborne-particle abrasion (Group SP and SM), and c) application of repair system II (CoJet Intraoral Repair System, Group CP and CM). All specimens were thermocycled, and the shear bond strength was measured. The data were analyzed using the Kruskal-Wallis analysis and the Mann-Whitney test with a significance level of 0.05. RESULTS. For the porcelain specimens, group SP showed the highest shear bond strength (25.85 ± 3.51 MPa) and group DP and CP were not significantly different. In metal specimens, group CM showed superior values of bond strength (13.81 ± 3.45 MPa) compared to groups DM or SM. CONCLUSION. Airborne-particle abrasion and application of repair system I can be recommended in the case of a fracture localized to the porcelain. If the fracture extends to metal surface, the repair system II is worthy of consideration.

Porcelain repair - Influence of different systems and surface treatments on resin bond strength

Yoo, Ji-Young,Yoon, Hyung-In,Park, Ji-Man,Park, Eun-Jin The Korean Academy of Prosthodonitics 2015 The Journal of Advanced Prosthodontics Vol.7 No.5

PURPOSE. The purpose of this study was to evaluate the bond strength of composite resin on the fracture surface of metal-ceramic depending on the repair systems and surface roughening methods. MATERIALS AND METHODS. A total of 30 disk specimens were fabricated, 15 of each were made from feldspathic porcelain and nickel-chromium base metal alloy. Each substrate was divided into three groups according to the repair method: a) application of repair system I (Intraoral Repair Kit) with diamond bur roughening (Group DP and DM), b) application of repair system I with airborne-particle abrasion (Group SP and SM), and c) application of repair system II (CoJet Intraoral Repair System, Group CP and CM). All specimens were thermocycled, and the shear bond strength was measured. The data were analyzed using the Kruskal-Wallis analysis and the Mann-Whitney test with a significance level of 0.05. RESULTS. For the porcelain specimens, group SP showed the highest shear bond strength ($25.85{\pm}3.51MPa$) and group DP and CP were not significantly different. In metal specimens, group CM showed superior values of bond strength ($13.81{\pm}3.45MPa$) compared to groups DM or SM. CONCLUSION. Airborne-particle abrasion and application of repair system I can be recommended in the case of a fracture localized to the porcelain. If the fracture extends to metal surface, the repair system II is worthy of consideration.

The prognostic role of metabolic tumor volume at initial diagnosis in PET CT imaging in patients with large cell lung cancer

( Ji Hyung Hong ),( Sarah Park ),( Eun Ji Han ),( Ie Ryung Yoo ) 대한내과학회 2011 대한내과학회 추계학술대회 Vol.2011 No.1

The prevalence of large cell lung cancer is about 9% of all non-small cell lung cancer. The maximal standardized uptake value (SUV max) and metabolic tumor volume (MTV) of large cell lung cancer is not well established. The aim of this study is to present the characteristics of patients with large cell lung cancer, especially such as SUV max, MTV and photon defect of primary tumor site in PET CT image and also to find out some potential factors to predict the survival of the patients with large cell lung cancer. Of 33 patients with histologically confimed large cell lung cancer between 2006 and 2010 at Seoul St. Mary`s Hospital, the clinical characteristics and survival outcomes were assessed on the basis of age, sex, TNM staging, SUV max, MTV and photon defect of primary tumor site in PET CT at initial diagnosis. Stage I,II was 5(15.1%), III 14 (42.4%), IV 14 (42.4%) patients. Primary tumor size was from 1.3-12.8 cm (median 4.5 cm). Mean SUV max and MTV were 10.53±5.69, 138.36±341.99, respectively. 14 (42.4%) patients had photon defect in their primary tumor. Of 33 patients, 11 (33.3%) patients reached complete or partial responses. Photon defects were observed in 7 (63.6%) among 11 patients of responders and 5 (35.7%) among 14 patients of non-responders (p=0.238). Mean SUV max was 11.13±5.85, 10.40±3.58 (p=0.176), and MTV was 73.46±96.87, 232.06±486.70 (p=0.285) respectively. There was no significant differences between two groups, but some tendency of increase of SUVmas and MTV in non-response group was observed. Median survival time was 7 months and progression-free survival 3 months. Factors that had significant impact on overall survival were MTV (p=0.017), stage (p=0.027) and age (p=0.026). Factors that had significant impact on progression free survival were MTV (p=0.036) and stage (p=0.018). But photon defect and SUV max of primary tumor site failed to show significant differences on the survival of patients. Our study presents the values of SUV max, MTV and photon defect of primary tumor site at initial diagnosis in patients with the large cell lung cancer, and MTV can be a potential prognostic factor on survival of patients with large cell lung cancer.

증례 : 소화기 ; 간경변증 환자에서 창자정체증후군에 의한 흡수장애 1예

유지연 ( Ji Youn Yoo ),강형민 ( Hyung Min Kang ),최진우 ( Jin Woo Choi ),정숙향 ( Sook Hyang Jeong ),김형호 ( Hyung Ho Kim ),김영훈 ( Young Hoon Kim ),이혜승 ( Hye Seung Lee ) 대한내과학회 2011 대한내과학회지 Vol.81 No.3

저자들은 C형 간염바이러스에 의한 간경변 환자에서 빈혈, 저콜레스레롤혈증, 저단백혈증을 보이는 창자정체증후군에 의한 흡수장애증후군이 동반되었고 수술적 절제로써 흡수장애에서 회복된 증례를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Of the various causes of malabsorption, to our knowledge, blind loop syndrome has been reported in Korea only rarely. Here, we report the case of a 63-year-old woman with hepatitis C virus-associated liver cirrhosis. The patient complained of abdominal distension and had an abnormal serum biochemistry caused by blind loop syndrome related to childhood abdominal surgery. Her laboratory findings showed an iron deficiency anemia, hypocholesterolemia, hypoproteinemia and hypoalbuminemia, and were confounded with those of liver cirrhosis. She underwent resection of the blind loop segment of the small intestine, after which her abdominal symptoms and abnormal laboratory findings improved, although they did not completely normalize due to her liver cirrhosis. (Korean J Med 2011;81:372-377)