야뇨증 환아들의 심리사회적 특성에 대한 다기관 연구 : 행동 및 정서 문제를 중심으로

조수철,김재원,신민섭,황준원,한상원,박관현,이상돈,김경도,김건석,서홍진,이유식,정재용,김영균,문두건,남궁미경,한창희,조원열,김영식,배기수,이종국,정우영,신의진 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.6

Objectives : The aim of this study was to examine the behavioral and emotional problems associated with nocturnal enuresis in Korean children. Methods : Three hundred eighteen children with nocturnal enuresis, together with their parents, completed the Child Behavior Checklist (CBCL), Disruptive Behavior Disorder Scale according to DSM-IV (DBDS), Children's Depression Inventory (CDI), State-Trait Anxiety Inventory for Children (STAIC), and Piers-Harris Children's Self-Concept Scale (PHCSC). Ninety-three normal students were selected as the control group. Results : Compared to the normal control group, the mean scores with regard to the withdrawn, social problems, attention problems, delinquent behavior, aggressive behavior, externalizing problems and total problems profiles were significantly higher in the nocturnal enuresis group according to the CBCL results. The nocturnal enuresis group also scored significantly higher in the ADHD and ODD profiles of the DBDS. The nocturnal enuresis group was more depressed and anxious than the control group according to the results of the CDI and STAI. The mean score of the PHCSC was significantly lower in the nocturnal enuresis group when compared to the normal control group. Conclusion : The results of this study suggest that children with nocturnal enuresis in Korea have clinically relevant behavioral and emotional problems. The findings support the link between nocturnal enuresis and psychopathology in Korean children.

골수염의 진단에 있어서의 Tc-99m Hexamethylpropylene amine oxime 백혈구 스캔의 임상적 유용성

최상호,김양수,정준원,정진원,추은주,서동대,배인규,양승오,우준희,류지소 대한화학요법학회 2001 대한화학요법학회지 Vol.19 No.1

배경 : 골수염의 진단에 있어 Technetium-99m을 이용한 삼상 골스캔(Tc-99m MDP스캔)은 단순방사선 검사상 정상소견을 보이는 경우에 쓰이는 1차적 검사로 매우 높은 민감도를 보인다. 그러나 Tc-99m MDP 스캔은 골절이나, 정형외과적 삽입물, 신경병적 관절병변과 같이 뼈의 재형성이 증가되는 상황에서도 양성소견을 보여 특이도가 낮은 단점이 있다. 이러한 단점을 보완하고자 골수염의 진단에 있어 Tc-99m HMPAO 백혈구 스캔의 유용성을 알아보고자 하였다. 대상 및 방법 : 골수염이 의심되어 Tc-99m HMPAO 백혈구 스캔을 시행했던 15명의 의무기록을 후향적으로 분석하였다. 골수염의 확진은 임상관찰 소견과 배양검사 결과와 병리소견을 기준으로 하였다. 결과 : 골수염의 진단에 있어 Tc-99m HMPAO 백혈구 스캔의 민감도와 특이도는 각각 100%와 78%였고 Tc-99m HMPAO 스캔의 경우는 100%와 18%였다. 가장 흔한 원인균은 methicillin-resistant S. aureus였다. Tc-99m MDP 스캔에서 양성소견을 보였던 환자중 3명의 환자가 Tc-99m HMPAO 백혈구 스캔에서 음성 소견을 보였으며 이 환자들은 추적관찰상 골수염이 없는 것으로 확인되었다. 결론 : Tc-99m HMPAO 백혈구 스캔은 골수염의 존재를 진단하는데 있어 민감도와 특이도가 높으며, 특히 뼈의 재형성이 증가되어 Tc-99m MDP 스캔의 특이도가 낮게 나타나는 상황에서 유용하리라 사료된다. Background Three phase bone scintigraphy, performed with technetium-labeled diphosphonates (Tc-99m MDP scan), is the very sensitive radionuclide procedure of choice for diagnosing osteomyelitis. But, Tc-99m MDP scan is less specific when bone remodeling is increased. To overcome this limitation, we evaluated the diagnostic value of technetium-99m hexamethylpropyleneamine oxime (HMPAO) labeled leukocyte scan in osteomyelitis. Methods : We retrospectively reviewed 15 patients with suspected osteomyelitis who performed Tc-99m HMPAO labeled leukocyte scan. The diagnosis of osteomyelitis was based on clinical course and bacterial culture, and pathologic findings. Results The sensitivity and specificity of Tc-99m HMPAO leukocyte scan was 100% and 78%, and those of Tc-99m MDP scan was 100% and 18%, respectively. The most common organism was Methicilein-Resistant S. aureus. Among the patients that showed persistent accumulation on Tc-99m MDP scan, three patients showed no uptake on Tc-99m HMPAO leukocyte scan and these patients were confirmed that had no osteomyelitis. Conclusion : Tc-99m HMPAO leukocyte scan is a useful test for determining the presence or absence of osteomyelitis, especially under condition that bone remodelin is increased.

非線形 肺 가스 結合特性의 電氣的 모델化

鄭亨煥,周秀元,李浚柝 동아대학교 공과대학 부설 한국자원개발연구소 1987 硏究報告 Vol.11 No.1

A newly derived O₂ Saturation Model which can adapted to the design and study of Artificial Lung and Blood Gas Calculator etc. is introduced on the of Electrical Equivalent Circuits. The presented 4 stage and 2 stage RC circuits have good correlations with actual chemical reactions of Hemoglobin and Oxygen. However from the results of computer simulations, 2 stage equivalent model is more accurate than 4 stage and conventional O₂ saturation models.

소뇌뇌교각종양에서 수술중 전기생리학적 신경계집중감시의 변화

서대원,박관,안재영,이상구,정진상,홍승봉,이원용,김병준,김종현 대한신경과학회 1999 대한신경과학회지 Vol.17 No.1

전력전자 PSPICE 컴퓨터 시뮬레이션을 위한 스위치 모델

元忠淵,金淵俊,金世燦,金德憲 成均館大學校 科學技術硏究所 1990 論文集 Vol.41 No.2

PSPICE is widely used in analysis of general circuit and simulation in electric and electrical field is applied to power electronics circuit. The circuits used with thyristors will add significant complexity to PSPICE analysis, it is important that the thyristor model be as simple as possible. In order to solve this problem, an ideal voltage controlled switch and an ideal current controlled switch were added as circuit elements. Two typical power electronics circuits simulation using PSPICE program presented.

기저질환이 없는 사람에서 발생한 Campylobacter fetus에 의한 재발성 심내막염 1예

전재범,정진원,김성혜,송문희,오형철,안성기,최상호,김남중,김양수,우준희,류지소 대한감염학회 2004 감염과 화학요법 Vol.36 No.6

C. fetus 심내막염은 드물게 발생하는 질환으로 주로 면역능이 저하된 환자에서 발병하고 대동맥판을 침범하는 경우가 많으며 적절한 치료가 되지 않을 경우 치사율이 높다. 저자들은 기저질환이 없던 69세 남자에서 C. fetus 심내막염을 경험하였기에 문헌고찰과 함께 보고하는 바이다. 환자는 발열로 내원하여 시행한 혈액배양 검사상 C. fetus가 동정되었고 경식도 초음파 검사상 삼첨판에 증식증이 발견되어 심내막염 진단하에 ceftriaxone에 이어 meropenem으로 총 4주간 항생제를 투여받고 호전되었다가 한달 후 다시 재발하였고 판막부전 소견 진행하여 삼첨판 치환술을 시행받고 전신상태 호전되어 퇴원하였다. Campylobacter fetus is a rare cause of endocarditis. To date, only about 30 cases of C. fetus endocarditis have been reported mainly in the elderly with chronic underlying illnesses. Most cases showed tendency to involve aortic valve. This report describes a case of native tricuspid valve infective endocarditis in a 69-year-old man without any underlying disease. Despite adequate antibiotic therapy for 4-weeks, endocarditis recurred and leading to surgical valve replacement.

최근 발병한 정신분열병 환자의 증상 관해 및 정신사회적 기능 : 1년 전향적 추적 관찰 연구

정석훈,박원명,권준수,박지홍,안준호,고진경,김창윤 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.5

Objectives : The long-term outcome of schizophrenia is still considered vahable and inconclusive. We perfonned a one-year prospective observational study to investigate the longitudinal outcomes in patients with recent-onset schizophrenia. The primary purpose was to determine the descriptive outcomes in tenns of symptom remission and psychosocial function. The secondary purpose was to identify predictor variables associated with the outcomes. Methods : Patients experiencing their first episode ofpsychosis or hospitalization within the past 2 years with a diagnosis of DSM-IV schizophrenia were included. Clinical symptoms were assessed monthly using Brief Psychiatric Rating Scale (BPRS), Scale for the Assessment of Positive Symptoms (SAPS), Scale for the Assessment of Negative Symptoms (SANS) and Clinical Global Impression (CGI) scale. Psychosocial function was measured using PSYCH-UP (Psychosocial symptoms you currently have, follow-up version) and Heinrichs' Quality of Life Scale (QLS) at baseline, 6, and 12 months and Global Assessment of Functioning (GAF) monthly. Remission was defined on the basis of overall, and psychotic core symptoms as having 1) BPRS total score ≤ 36, and 2) Each individual item score of core psychotic items (conceptual disorganization, suspiciousness, hal-lucinatory behavior, unusual thought content) ≤3, and 3) CGI severity score ≤3, and 4) Duration of remission at least for 2 consecutive months. To identify the predictive variables for the outcome, relationships between time to remission and various clinical variables were examined using Cox proportional hazards model. Results : A total of 49 patients with schizophrenia were enrolled in this study. The proportions of patients with symptom re-mission were 54.5% (24/44, drop outs=5) at 3 months, 55.3% (21/38, drop outs=11) at 6 months, and 64.3% (18/28, drop outs=21) at 12 months. Mean time to remission was 3.76±2.43 (s.d.) months, and the mean duration of remission was 7.54±2.99 months. Significantly longer time to remission was predicted by higher SANS total score at baseline in various predictor variables (p=0.01). Impairments of psychosocial function measured using PSYCH-UP and QOL were significantly improved at the end of this study, but still remained at mild to moderate level. SANS total score and GAF score significantly correlated with most ofthe items related to psychosocial fimction at 12 months. The proportion of the patients with GAF score ≥60 increased from 6.1% at baseline to 85.8% at 12 months. Of the patients who were in remission at 12 months, 95.5% obtained GAF score ≥60. Conclusion : This study showed 64.3% of symptom remission rate in patients with recent-onset schizophrenia. Symptom re-mission was accompanied by significant improvement ofglobal function. The severity of negative symptom at baseline appeared to be a significant predictor for time to remission. Psychosocial function was improved at the end of this study, but impainnents still remained at mild to moderate level. GAF score and negative symptoms significantly correlated with psychosocial function.

흑연/에폭시 복합재료의 엔드밀가공시 발생하는 음향방출신호 특성

정전영,신경오,김원일 慶南大學校 附設 工業技術硏究所 1998 硏究論文集 Vol.15 No.2

본 연구에서눈 흑연/에폭시 복합재료의 엔드밀 가공시 절삭조건의 변화에 따른 공구 마멸현상을 음향방출신호에 의하여 검출하고 엔드밀 마멸이 표면거칠기에 미치는 영향을 연구하였다. 실효치 전압은 절삭속도 증가에 따라 증가하고 같은 절삭조건에서는 이송속도가 낮을 때가 공구 마멸 및 표면거칠기 상태가 양호해짐을 확인하였다. 공구의 플랭크 마멸량, ?? =0.2㎜부근에서 실효치 전압의 상승과 하강이 불규칙적으로 심해지며, 이 때를 적절한 공구교한 시기로 판단할 수 있다. In this study, AE signals used to detect the wear of end-mill on various cutting conditions and investigated the effect of the end-mill wear to the surface roughness. The ?? values increased as the cutting speed increases, and for a given cutting conditions, the decreasing of the federate give a favorable effect to the tool wear and the surface roughness. The ?? values rise and go down rapidly when the flank wear comes to ??= 0.2㎜, thus it can be considered that it is the appropriate time to change the tool.

Preparation of mechanically enhanced supramolecular carbon nanotube (CNT) film using a water‑soluble π–π bonding linker

Jun‑Woo Lee,Moonseong Yoo,Kun Won Kim,Hyein Jeong,Jae Woo Chung 한국탄소학회 2019 Carbon Letters Vol.29 No.5

Mechanically enhanced supramolecular carbon nanotube (CNT) films were prepared in water by employing the π-electronrich phenyl, naphthalenyl, and pyrenyl end-functionalized polyethylene oxides (PEOs) as supramolecular linkers, followed by vacuum filtration. Among them, the supramolecular CNT film produced by the pyrenyl end-functionalized PEO (PEOPy) exhibited the highest mechanical strength, which was ~ 1.5–2 times higher than that of the CNT films produced using the typical dispersant, Triton X-100, although the functionality of PEO-Py was lower than that prepared using other linkers, and the content of PEO-Py in the CNT films was lower than that obtained using Triton X-100. Fluorescence and UV–Vis spectroscopy demonstrated that the improved mechanical properties of the supramolecular CNT film result from the formation of π–π interactions between the CNT and the pyrene moieties of the PEO-Py linker. Finally, the supramolecular CNT film exhibited a 40–50 dB electromagnetic shielding efficiency through hybridization with silver nanowires.

Maypole Type 편조기의 Guide Track의 동적 모델링 및 해석

정원지,김재량,최선준,김임선 한국공작기계학회 2003 한국생산제조학회지 Vol.12 No.4

Braiding machines of maypole type complex guide tracks. It is not easy to speed up driers while carriers are moving at high speed. This paper presents a new design approach using dynamic analysis and modeling for moving carriers on the guided tracks. The proposed approach will be shown to be effective by using simulation tool, WORKING MODEL 2D^??, for high drivers on new models of braiding machines of maypole type.