입원 치료를 받은 여성 알코올리즘 환자의 퇴원 후 경과에 대한 연구

안길준(Kil-Joon Ahn),김길숙(Gil-Sook Kim) 한국중독정신의학회 2000 중독정신의학 Vol.4 No.2

Background:There are few follow-up studies in women alcoholics, because the number of patients who are willing to admit psychiatric treatment is guite small and women alcoholics have been paid little attention. So we aimed to investigate women alcoholics’ treatment outcomes and clinical characteristic that related to the prognosis. Methods:We reviewed the medical records of women alcoholics who had been hospitalized in Seoul Natonal Mental Hospital for at least 2 weeks from 1995 to 1999, and then interviewed with patients and their family members by telephone. we classified 44 women alcoholics into 2 groups (recovering group and relapsed group), and compared their alcohol related history and clinical characteristics during admission and after discharge. Results:44 female alcoholics were classified into ‘relapsed group’ (N=28, 63.6%) and ‘recovering group’ (N=16, 36.4%). Among relapsed group, all patients were relapsed within 6 months after discharge. At the point of follow-up interivew, mean postdischarge period was 28.23±13.99 months. Among total patients, 5 patients attended to outpatient department or A.A. Relapsed group had a shorter duration of hospitalization, higher percentage of AMA (against medical advice) or forced discharge, and higher incidence of aggressive behaviors than recovering group. Recovering group had more tendency to return to work after discharge. Most common reason for recovery was familial support. Most common substitute for alcohol was religion. Conclusion:About 36.4% women alcoholic inpatients had recovered from alcholism. Risk factors of poor outcome were early dropout after discharge and history of aggressive behavior during admission, so we suggest that for better outcome careful management for these risk factors is necessary.

표면 부착형 영구자석 전동기의 권선단락고장 센서리스 진단

안길준(Giljun Ahn),이준민(Junmin Lee),박찬희(Chan Hee Park),윤명백(Myeongbaek Youn),윤병동(Byeng D. Youn) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12

Surface-mounted permanent magnet synchronous motors (SPMSMs) are widely used in high precision control systems such as industrial robots. If inter-turn faults of SPMSM were not early detected, it may cause enormous financial loss. This study deals with the analysis of low severity level faults of SPMSM with various load condition. The mathematical model of SPMSM with low severity inter-turn faults is established and simulated. From the simulation results, the possibility of shorted circuit current as a fault indicator indicating the severity of fault was confirmed. Not only confirm the possibility, this study suggests the method to estimate the fault indicator without additional sensor such as accelerometer or voltage probe. The simulation of proposed method was conducted and the simulation results verify the effectiveness of proposed method as well.

스마트 그리드에서의 프라이버시 보호

박남제(Namje Park),안길준(Gail-Joon Ahn) 한국정보보호학회 2010 情報保護學會誌 Vol.20 No.3

최근 그린 IT에 대한 관심이 고조되면서 저탄소 녹색성장의 완성을 위해 지능형 전력망으로 불리는 스마트 그리드(Smart Grid) 기술을 도입하여 빠른 환경 변화에 한발 앞서가고 있다. 스마트 그리드를 통해 전력망이 진화하고 있지만 사이버 공격과 비고의적인 위험노출에 대한 우려도 일각에서 제기되고 있는 상황이다. 전력망이 갈수록 복잡해지고 서로 연결됨에 따라 유틸리티 공급업체의 사이버 보안 위협을 위한 노력이 점차로 중요하게 될 것이다. 이에 본 연구에서는 스마트 그리드의 개인정보보호 필요성과 침해 유형들을 살펴보고, 스마트 그리드에서의 프라이버시 보호에 대한 고려사항과 보호 제공방안을 고찰하도록 한다.

항정신병약물을 복용중인 정신분열병 환자에서 고프로락틴혈증과 무월경 유병률 및 성기능 장애와 관련성

이가희,강시현,강권영,김경훈,김권곤,소민아,안길준,이종일 대한신경정신의학회 2009 신경정신의학 Vol.48 No.6

Objectives Many antipsychotics are associated with hyperprolactinemia and sexual dysfunction. This study investigated the prevalence of hyperprolactinemia and amenorrhea and explored the association between hyperprolactinemia and sexual dysfunction. Methods We analyzed 285 patients with schizophrenia or schizoaffective disorder who had been taking antipsychotics more than one year, examining their serum prolactin levels and administering the Arizona Sexual Experience Scale (ASEX) to evaluate for sexual dysfunction. We conducted an ANCOVA to evaluate the effect of hyperprolactinemia on ASEX score and amenorrhea. Results We found hyperprolactinemia in 52.3% of the patients, finding it to be more common in females (60.8%) than in males (49%). Patients taking risperidone had the highest prevalence of hyperprolactinemia (86.5%), and patients taking aripiprazole showed no hyperprolactinemia. Amenorrhea prevalence was 21.5%. Hyperprolactinemia did not significantly affect ASEX scores, but it significantly affected amenorrhea. Conclusion Many patients taking antipsychotics still experience hyperprolactinemia in a real clinical setting. The prevalence of hyperprolactinemia varies among antipsychotics. Clinicians should consider the possibility of antipsychotic-induced hyperprolactinemia, with its potential adverse effects, when treating such patients

전류 신호 특성 주파수를 활용한 협동로봇 모터 고장 진단

이준민(Junmin Lee),박찬희(Chan Hee Park),안길준(Giljun Ahn),윤명백(Myeongbaek Youn),윤병동(Byeng D. Youn) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12

상전류 신호를 이용한 합성곱 네트워크 기반 유도전동기 고장 진단

박찬희(Chan Hee Park),이준민(Junmin Lee),안길준(Giljun Ann),윤병동(Byeng D. Youn) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12

Induction motors (IMs), which are mainly applied to water pump, crane, and air handling unit in a large vessel, are widely used due to their low costs and high reliability compared to dc motors. Although the reliability of IM is quite high, their unexpected manifestation due to some manufacturing tolerance, various environmental conditions and mistakes in the field lead to huge loss even with a small down-time. The fault detection of IM is thus necessary, and motor current signature analysis (MCSA) is one of the most effective methods for diagnosing motor faults. MCSA has advantages in the part of non-invasive data acquisition, however, suffers from noise and difficulties in feature extraction. This study thus proposes an automated feature extraction and fault diagnosis method using convolutional neural network (CNN). The proposed method is validated with the experimental data measured from a 160kW IM, and the improved performance of it is confirmed by comparing it with the results obtained from the conventional methods.

체중증가 발생 가능성에 따른 항정신병약물 네 군 간의 정신분열병 환자의 주관적 삶의 질 비교 연구

김경훈,강시현,강권영,김권곤,소민아,안길준,이종일,이가회 대한신경정신의학회 2011 신경정신의학 Vol.50 No.5

Objectives The aim of this cross-sectional study was to compare the subjective quality of life in the four groups of antipsychotics according to the risk of weight gain in patients with schizophrenia. Methods One hundred and thirty-two patients with schizophrenia that had taken the same antipsychotics for more than 1 year were enrolled in the analyses. Anti-psychotic agents were classified by the risk of weight gain into four groups : serious, common, not unusual, and unusual. The quality of life was measured with the Schizophrenia Quality of Life Scale Korean version, 4th Revision (SQLS-R4K). We analyzed the correlation between the total score of SQLS-R4K and clinical variables. Results The SQLS-R4K score was significantly different in the four anti-psychotic groups (F=5.200, p=0.002). Gender, type of anti-psychotics (typical, atypical), duration of treatment with current antipsychotics, duration of illness, and Body Mass Index were not significantly correlated with the SQ-LS-R4K score. Conclusion The subjective quality of life was different according to the risk of weight gain groups of anti-psychotic agents.

원심식 산파기의 회전 원판 날개 형상에 따른 파종 궤적의 동역학적 분석

정우진 ( Woo Jin Chung ),오주선 ( Joo Seon Oh ),안길준 ( Gil Jun Ahn ),김경욱 ( Kyeong Uk Kim ) 한국농업기계학회 2016 한국농업기계학회 학술발표논문집 Vol.21 No.2

원심식 산파기에 의한 파종의 정밀성을 향상하기 위해서는 산파기로부터 토양 표면에 불규칙적으로 뿌려지는 종자의 분포 패턴을 분석하여 산파기의 효율을 높이는 것이 중요하다. 하지만 원심식 산파기에 대해 파종 궤적과 종자의 분포를 날개 형상에 따라 동역학적으로 분석하여 비교한연구는 미흡한 실정이다. 본 연구를 위해 먼저 원심식 산파기의 회전 원판 날개 형상을 직선형, 직선 원추형, 전향 피치형, 곡선형으로 구분하고, 종자의 회전 원판 위에서 날개 끝에 도달하여 지표면에 산파될 때까지의 운동에 대해 수학적 모델을 만들었다. 이를 기반으로 동일 날개 형상에서 회전 원판의 각속도에 따라 종자가 얼마나 멀리 날아가는지를 비교해보았다. 분석 결과 각속도가 빨라질수록 종자는 더 멀리 산파되었으며, 각속도가 540 rpm에서 1,000 rpm으로 빨라졌을 때 종자의 최대 산파 거리는 최소 2.53배에서 최대 3배까지 차이가 발생하였음을 확인하였다. 한편 회전 원판의 각속도가 같을 때 회전 원판의 날개 형상에 따라 나타나는 종자의 분포 차이를 확인해보았다. 그 결과 종자는 회전 원판의 날개 형상이 원추형일 때 최대, 전향 피치형일 때 최소로 날아가는 것을 확인할 수 있었다. 따라서 농토의 면적이 작아서 산파기의 작업 폭이 작을 때는 직선형 회전 원판을 사용하는 것이 경제적이며, 농토의 면적이 클 때는 원추형 회전 원판을 사용하는것이 경제적일 것으로 판단된다.