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정신분열병의 해리증상, 아동기 학대 및 임상증상의 관계
이경우(Gyeong Woo Lee),배활립(Hwallip Bae),김양석(Yangsuk Kim),박준성(June Sung Park),김대호(Daeho Kim) 대한생물치료정신의학회 2008 생물치료정신의학 Vol.14 No.1
Objectives : Studies consistently find high prevalence of early sexual or physical abuse among the schizophrenic population suggesting a possible linkage between psychological trauma and schizophrenia. This study sought for clinical correlates of dissociative symptoms in schizophrenia concerning childhood abuse and a variety of symptoms. Methods : Sixty-one inpatients with schizophrenia completed Dissociative Experiences Scale(DES), Symptom Checklist-90-Revised(SCL-90-R), Positive and Negative Syndrome Scale(PANSS), and a semistructured interview on abuse history. Results : The Global Severity Index(GSI) of SCL-90-R, positive symptom, chlorpromazine equivalent, and childhood abuse were significantly correlated with DES scores. However, multiple regression analysis yielded GSI and positive symptom accounting 57% of variance for DES scores. Conclusion : This finding suggests that the symptoms of dissociation in schizophrenia are rather associated with severity of general symptomatology and positive symptoms than history of childhood abuse. Some portion of schizophrenic population with high scores on DES need to be further investigated for their characteristics and pathophysiology.
돼지 지방 조직 및 골수 유래 성체줄기세포의 성상분석과 다능성에 관한 연구
이아영,최경임,나진주,소병재,이경우,장기윤,송재영,차상호,Lee, Ah-Young,Choe, Gyeong-Im,Nah, Jin-Ju,So, ByungJae,Lee, Kyung-Woo,Chang, Ki-Yoon,Song, Jae-Young,Cha, Sang-Ho 대한수의학회 2013 大韓獸醫學會誌 Vol.53 No.1
Mesenchymal stem cells (MSCs) have ability to differentiate into multi-lineage cells, which confer a great promise for regenerative medicine to the cells. The aim of this study was to establish a method for isolation and characterization of adipose tissue-derived MSC (pAD-MSC) and bone marrow-derived MSC (pBM-MSC) in pigs. Isolated cells from all tissues were positive for CD29, CD44, CD90 and CD105, but negative for hematopoietic stem cell associated markers, CD45. In addition, the cells expressed the transcription factors, such as Oct4, Sox2, and Nanog by RT-PCR. pAD-MSC and pBM-MSC at early passage successfully differentiated into chondrocytes, osteocytes and adipocytes. Collectively, pig AD-MSC and BM-MSC with multipotency were optimized in our study.
박일초(Il-Cho Park),서광철(Gwang-Cheol Seo),이경우(Gyeong-Woo Lee),김성종(Seong-Jong Kim) 한국표면공학회 2015 한국표면공학회지 Vol.48 No.6
In this paper, arc Zn thermal spray coating was carried out on the SS400 steel, and then various electrochemical characteristics and surface damage behavior of Zn thermal spray coating layer were analyzed. As the results, the potential of Zn thermal spray coating layer presented driving voltage above 300 mV compare to that of SS400 steel. The passivity characteristic in anodic polarization curve was not presented. It was adequate to as sacrificial anode material. In the surface damage after galvanostatic experiments, uniform corrosion tendency of Zn thermal spray coating layer was clearly observed with acceleration of the dissolution reaction. In conclusion, Zn thermal spray coating could be determined to represent the corrosion protection effect by stable sacrificial anodic cathodic protection method in seawater because it had sufficient driving voltage and uniform corrosion damage tendency for the SS400 steel.
고속활주선의 운동성능 평가를 위한 수치해석적 추가 연구
김상원(Sang Won Kim),서광철(Kwang Cheol Seo),조대환(Dea Hwan Cho),박근홍(Geun Hong Park),이경우(Gyeong Woo Lee) 한국항해항만학회 2017 한국항해항만학회 학술대회논문집 Vol.2017 No.추계
본 연구에서는 Begovic and Bertorello (2014)의 고속활주선 모델시리즈 중 Warped hull 2의 실험결과를 규칙파 파랑조건을 바탕으로 2가지 기법(스트립 기법 및 CFD)의 수치해석 결과를 비교하였다. 선속의 경우, 총 3가지(3.4m/s, 4.6m/s, 5.75m/s)를 사용하였으며, 속도영역은 반활주 및 활주영역에 해당한다. 결론적으로, 스트립기법의 경우, λ/LOA=2-4 구간에서 공진현상이 발생하여 다른 구간 대비 높은 운동응답 값을 보이는데, 이는 실험값과 상이함을 확인하였다. CFD의 경우, 전반적인 경향은 실험값과 일치하는 것을 확인하였고, λ/LOA=0.5-2.5 구간에서 실험값 대비 다소 큰 운동응답 값을 보였다. 이러한 형상은 속도가 증가할수록 격차가 커지는 것을 확인하였으며, λ/LOA=2.5-5.2에 비해 파고에 배치된 높이방향 격자수가 상대적으로 적기 때문에 오차가 발생한 것으로 판단된다. In this research, experimental seakeeping results of Warped hull form 2 on the regular waves were compared with numerical results of strip method and CFD. In case of ship’s speed, there are 3 cases (3.4m/ s, 4.6m/ s, 5.75m/s) for numerical simulation, and they are belong to semi-planing and planing condition. Consequently, in case of strip method, it is shown that the resonance phenomena occurred from around λ/LOA=2 to 4 and RAO value were significantly higher than that of other. this is different from experimental results. In case of CFD, overall trends were similar with experimental values except there are somewhat excessive RAO values around λ/LOA=0.5 to 2.5. these phenomena is confirmed that it became larger as the ship’s speed increased, and it was considered that the error occurred because the number of mesh in vertical direction of wave height at λ/LOA=0.5 to 2.5 were relatively less than those of wave height at λ/LOA=2.5 to 5.2.
비대칭 고속 쌍동선의 선미터널 출구영역의 경사각 변화에 따른 저항성능 및 항주자세 분석
김상원(Sang Won Kim),서광철(Kwang Cheol Seo),조대환(Dea Hwan Cho),김병재(Byung Jae Kim),이경우(Gyeong Woo Lee) 한국항해항만학회 2017 한국항해항만학회 학술대회논문집 Vol.2017 No.추계
본 연구에서는 선미 터널을 적용한 비대칭 고속 쌍동선을 수치해석 기법을 통해 선체의 유체동역학적 성능을 평가하였다. 선미터널 형상은 터널 출구 형상에 경사각에 따라 구분하였으며, 총 3가지 형상(0°, 3°, 6°)을 사용하였다. 결론적으로, 저항성능의 경우, 전 속도 구간에서 0° 경사각의 선미터널은 기존 대비 4.8-17.9% 감소한 것을 확인하였다. 하지만 3°와 6°경사각을 가진 선미터널은 각각 기존대비 5-14%와 5-29%의 저항이 증가하는 것을 확인하였다. 이와 달리, 트림각의 경우, 0°경사각은 전 속도구간에서 기존선형과 유사한 경향을 보였으나, 3°와 6°경사각의 경우 각각 FnV=1.54이후에서 평형상태 유지 및 계속적인 감소 형태를 보였다. 이와 같은 형상은 터널 출구 영역에 경사각을 증가하는 것이 저항성능 측면에서 다소 악영향을 발생하지만 운항성능 측면에서는 기존대비 개선됨을 보여준다. In this research, tunnel stern was applied on the asymmetric high-speed catamaran to evaluate vessel’s hydrodynamic performance by numerical method, and the tunnel stern types are distinguished by angle of inclination of tunnel exit region into 3cases (0°, 3° and 6°). Consequently, it is confirmed that the total resistances of tunnel stern which have 0° of inclination are lower about 4.8-17.9% than the bare hull in the wide speed range, but those of 3° and 6° of inclination tunnel stern are higher than bare hull about 5-14% and 5-29%, respectively. On the other hand, trim angles of 0° of inclination tunnel stern show similar trend with those of bare hull in whole ranges of FnV but those of 3° and 6° of inclination tunnel stern are stabilized and declined respectively after FnV=1.54. These phenomena indicated that increasing angle of inclination of tunnel exit region had negative influence on resistance performance, however, it could make vessel’s operation performance better than bare hull.
정신분열병 입원 환자의 외상적 사건 및 외상 후 스트레스 장애 유병률
김대호,최선경,이경우,이경하,남정현 大韓神經精神醫學會 2006 신경정신의학 Vol.45 No.3
Objectives : This study investigated the prevalence of traumatic events and posttraumatic stress disorder (PTSD) in an admission cohort of schizophrenic patients from two university affiliated psychiatric units in Korea. Differences in symptomatology between those with and without trauma were also assessed. Methods : The consecutive sixty one inpatients (32 women and 29 men), who were diagnosed with schizophrenia by SCID-I, completed the Clinician-Administered PTSD Scale (CAPS), the Positive and Negative Syndrome Scale (PANSS), Symptom Checklist-90-Revised (SCL-90-R), Beck Depression Inventory, and State-Trait Anxiety Inventory. Results : Forty patients (66%) had at least one traumatic event in their life time. The most common traumatic event was child physical abuse (34%), followed by accidents (21%), traumatic loss (18%), witnessing violence (15%), child sexual abuse (10%), natural disaster (8%), adult physical assaults (8%), adult sexual assaults (5%), and psychotic symptoms (5%). Only one patient (2%), however, was diagnosed with current PTSD. Patients with traumatic events compared to those without traumatic events demonstrated significantly higher scores on State anxiety scale (p=.006) and several subscales of SCL-90-R including paranoia, anxiety, phobia, interpersonal sensitivity, and degree of psychosis. No differences of sociodemographic and clinical background variables were found between the two groups. Conclusion : Low rate (2%) of current PTSD found in this study is comparable to North American literature reporting 10-46% of PTSD within the schizophrenic population. Absence of substance abuse or homelessness and low rate of sexual violence in these Korean patients may explain the discrepant rates. However, distinct symptom profiles of patients with trauma may suggest that PTSD diagnosis runs short of describing such patients. The results from this study imply that schizophrenia per se may not be associated with increased prevalence in current PTSD diagnosis.