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장애이해 관련 연구 동향 분석 : 국내 실험연구를 중심으로
노영남 한국특수교육교과교육학회 2009 특수교육교과교육연구 Vol.2 No.1
본 연구는 장애이해 관련 연구의 분석을 통해 장애이해 관련 연구의 동향을 살펴보는 목적을 두고, 장애이해 관련 실험연구의 연구방법 동향은 어떠한가와 연구내용 동향은 어떠한 가라는 연구문제를 설정하고, 장애이해 관련 실험연구 석사학위논문 102편을 분석하였다. 본 연구의 결과 장애이해 관련 연구는 연구방법에서 주로 51명~100명의 초등학교 일반학생을 대상으로 통제집단 사전사후설계를 이용한 연구들이 많았으나, 최근 단일집단 사전사후설계도 증가하는 추세에 있는 것으로 밝혀졌다. 그리고 장애이해 관련 연구는 조사지나 설문지를 이용하여 주로 t검증을 하는 것으로 이루어졌으나, 최근에는 공변량분석과 t검증을 함께 사용하는 연구가 늘어나고 있는 것으로 밝혀졌다. 또한 장애이해 관련 연구는 연구내용 면에서 프로그램 위주의 통합활동이 주를 이루었으나, 최근에는 구체적인 단일활동을 통한 연구들이 시도되고 있으며, 태도나 인식의 개선 및 자아개념의 확립을 도모하는 연구들도 증가하고 있는 것으로 밝혀졌다. 따라서 장애이해 관련 실험연구는 일반학생들의 장애학생에 대한 인식과 태도 개선을 위해 연구방법 면에서 다양한 시도들이 이루어지고 있으며, 연구내용 면에서 심도 있는 활동들이 모색되고 있다고 할 수 있다.
노영남,박홍석,박광보,도영수,김영욱,이경복,박의준,김해솔,윤우성,김동익 대한혈관외과학회 2011 Vascular Specialist International Vol.27 No.1
Purpose: This study evaluated the prevalence of cystic disease in the intra-abdominal organs in a normal population and a group of patients with vascular disease. Methods: We reviewed the medical records and computed tomography scans of the vascular disease group and the control group. Vascular disease group (n=586) were patients who suffered with abdominal aortic aneurysm (AAA), aorto-iliac occlusive disease (AOD) and peripheral arterial occlusive disease (PAOD) and who were treated in our institute. The control group (n=424) were patients who visited the health promotion center in our institute during the same period. Results: The prevalence of abdominal cysts in the control group and the vascular disease group was 41.7%and 65.2%, respectively. The vascular disease group showed a higher prevalence of abdominal cystic lesion for all the specific vascular diseases. However, when the two groups were stratified according to age, the vascular disease group displayed no significant difference in the prevalence of abdominal cyst compared to that of the control group. Conclusion: Abdominal cystic lesions are common in patients with vascular disease, including AAA, AOD,and PAOD. But this high prevalence of abdominal cystic lesions seems to be associated with the advanced age of vascular disease patients. Further molecular-based research is needed to clarify the pathogenetic relationship between vascular disease and abdominal cystic lesions.
Prevalence of Asymptomatic Carotid Stenosis in Korea Based on Health Screening Population
노영남,우신영,김나리,김선우,김영욱,김동익 대한의학회 2011 Journal of Korean medical science Vol.26 No.9
We attempted to investigate the prevalence and risk factors of carotid artery stenosis in Korea. Twenty thousand seven hundred twelve individuals who underwent carotid artery ultrasonography for health screening between March 2005 and March 2010 were retrospectively evaluated. The population was divided into four groups, according to the degree of stenosis, as Group A, below 29%; Group B, 30% to 49%; Group C, 50% to 74%; Group D, above 75%. The medical records of the individuals were investigated, and Fisher’s exact test, chi-square tests, Kruskal-Wallis tests and a binary logistic regression model were used for statistical analysis. The prevalence of carotid stenosis was Group B,5.5%; Group C, 0.9%; Group D, 0.1%. Old age, male gender, hypertension, diabetes mellitus and ischemic heart disease were significantly higher in Groups C and D (P = 0.001,0.001, 0.001, 0.048, and 0.001, respectively). Among the males aged over 65 yr, the prevalence of carotid stenosis ≥ 50% and ≥ 30% were 4.0% and 18.2%, respectively. Asymptomatic carotid stenosis is not uncommon in Korea. Carotid ultrasonography is necessary for people with above-listed risk factors.
슬라이딩 모드 전류제어기를 이용한 산업용 전동기 구동 시스템에 관한 연구
노영남,임병국,전희종,차정화 崇實大學校 生産技術硏究所 1997 論文集 Vol.27 No.1
In this paper, the sliding mode control algorithm is applied in current controller of field oriented induction motor drive system. The proposed current control scheme is based on space voltage vector PWM drive and is considered for transiant state as well as steady state. The scheme exhibits several advantages in terms of reduced switching frequency, robustness to parameter variations, and improved performance in induction motor drive. Computer simulation results are presented to verify the proposed control scheme.