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RISS 인기검색어
- 검색키워드
- 저자 : Young Yi Lee (검색결과 3,620 건)
- 무료
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A Study on Characteristics of Wet Oxide Gate and Nitride Oxide Gate for fabrication of NMOSFET
Yi, Jae-Young,Lee, Young-Hui,Yi, Cheon-Hee 청주대학교 산업과학연구소 2005 産業科學硏究 Vol.23 No.1
이 논문에서는 HP 4145 소자 테스터를 사용하여 핫 케리어 효과와 트래핑차지, SILC의 특성을 비교하기 위하여 질화 산화막 게이트와 습식게이트 산화막을 가지고 0.26㎛ NMOSFET를 테스트하고 생성시켰다. 그 결과로 습식게이트 산화막소자보다 질화 산화막 게이트의 특성이 더 좋다는 것을 알게 되었고 특히 핫 케리어 라이트 타임이 (질화 산화막 게이트 소자는 30년이나 습식 게이트 산화막은 10년) 길고 Vg의 변화 및 항복전압이나 트래핑의 충전 등이 좋음을 알 수 있었다. In this paper we fabricated and tested the 0.26㎛ NMOSFET with wet gate oxide and nitride oxide gate to compare that the characteristics of hot carrier effect, charge to breakdown, transistor Id_Vg curve, charge trapping, and SILC(Stress Induced Leakage Current) using the HP4145 device tester. As a result we find that the characteristics of nitride oxide gate device better than wet gate oxide device, especially hot carrier lifetime (nitride oxide gate device satisfied 30years, but the lifetime of wet gate oxide was only 0.1year), variation of Vg, charge to breakdown and charge trapping etc.
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Validation of the oxford classification of iga nephropathy: A Single-Center Study in Korean Adults
( Ho Young Lee ),( Sul Hee Yi ),( Mi Seon Seo ),( Jin Nam Hyun ),( Jin Seok Jeon ),( Hyunjin Noh ),( Dong Cheol Han ),( Seung Duk Hwang ),( So Young Jin ),( Soon Hyo Kwon ) 대한내과학회 2012 The Korean Journal of Internal Medicine Vol.27 No.3
Background/Aims: The recently published Oxford classification of IgA nephropathy (IgAN) proposed a split system for histological grading, based on prognostic pathological features. This new classification system must be validated in a variety of cohorts. We investigated whether these pathological features were applicable to an adult Korean population. Methods: In total, 69 adult Korean patients with IgAN were analyzed using the Oxford classification system at Soonchunhyang University Hospital, Seoul, Korea. All cases were categorized according to Lee`s classification. Renal biopsies from all patients were scored by a pathologist who was blinded to the clinical data for pathological variables. Inclusion criteria were age greater than 18 years and at least 36 months of follow-up. We excluded cases with secondary IgAN, diabetic nephropathy combined other glomerulopathies, less than 36 months of follow-up, and those that progressed rapidly. Results: The median age of the patients was 34 years (range, 27 to 45). Mean arterial blood pressure was 97 ± 10 mmHg at the time of biopsy. The median follow-up period was 85 months (range, 60 to 114). Kaplan-Meier analysis showed significant prognostic predictions for M, E, and T lesions. A Cox proportional hazard regression analysis also revealed prognostic predictions for E and T lesions. Conclusions: Using the Oxford classification in IgAN, E, and T lesions predicted renal outcome in Korean adults after taking clinical variables into account.
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이기세,노명래,이영현 한국식물인간환경학회 2000 인간식물환경학회지 Vol.3 No.3
Human beings are getting isolated from the nature as industrialization and urbanization progress rapidly in our time. Especially, middle school students, who are at the first stage of adolescence and grow bodily and mentally faster than in any other period of their life, face many problems at school life adaptations. Owing to achievements at studies, relationships with parents, friends, and teachers, they are liable to get stress. This research aimed to examine how horticultural therapy might be applicable to middle school student in its effects of withdrawal, somatic symptom, and depression especially. The results were as follows; First, At the post test in withdrawal, the students of experimental group averaged 4.80, and those of control group averaged 6.85. Its means of withdrawal was a statistically significant difference(p<.05). Second, At the post test in somatic symptom, the students of experimental group averaged 2.20, and those of control group averaged 3.80. Its means of somatic symptom was no statistically significant difference. Third, At the post test in depression, the students of experimental group averaged 6.95, and those of control group averaged 10.65. Its means of depression was a statistically significant difference(p<.05). Though the horticultural programs were not effective significantly in mitigating somatic symptom, it was effective in curing withdrawal and depression. The results suggested that the horticultural therapy program was effective in remedying psychological problems of middle school student. To remedy students' psychological problems, more researches need to be made for the generalization of horticultural therapy, and diverse programs should be developed.
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이장준,이현아,최종환,이형,임정근,이상도,박영춘 계명대학교 의과학연구소 2000 계명의대학술지 Vol.19 No.2
Cerebral small vessel disease is the most important cause of lacunar infarction (LI) and intracerebral hemorrhage (ICH). It is generally postulated that, in its early stages, the vascular lesion engenders vessel wall fragility and ICH. But if rupture dose not occur, segmental vessel occlusion evolves, producing LI. It may be a common aging phenomenon that is exacerbated by hypertension and diabetes mellitus. This study was performed to evaluate risk factors of LI and ICH. We reviewed retrospectively the medical records of 690 patients (254 LI, 436 ICH) with stroke who were admitted to Keimyung University Dongsan Medical Center from January 1995 to December 1998. The major risk factors including age, sex, hypertension, diabetes mellitus and several minor risk factors were analyzed in these patients. Older age (p<0.01), male sex(p<0.01), hypertension with treatment(p<0.01), hypertension with long duration(p<0.01) and hypertriglyceridemia(p<0.01), cigarette smoking(p<0.01) were significantly more frequent in LI. Younger age(p<0.01), female sex(p<0.01) and hypertension without treatment(p<0.01), hypertension with short duration(p<0.01) were more frequent in ICH. The prevalence, duration and treatment of diabetes mellitus were not different between these two groups. This study show that the age, sex, treatment of hypertension, duration of hypertension and cigarette smoking seem to be significant risk factors between LI and ICH.
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이동국,이상도,유영수,박영춘,임정근,이 형 啓明大學校 醫科大學 1993 계명의대학술지 Vol.12 No.2
This study was undertaken to evaluate the correlation between urodynamic findings and localization of CNS lesions in patient with voiding disturbance. The patient group consisted of 48 patients (35 male and 13 female) with various localization of CNS lesions confirmed by CT or MRI among which were 9 cerebral cortex, 8 putamen and internal capsule, 6 thalamus and internal capsule, 7 brain stem and 18 spinal core. m and 18 spinal core. Nineteen of the 42 patients with various CNS lesions above sacral crod showed detrusor hyperreflexia. Six of the 7 patients who had suprasacral cord lesion and detrusor hyperreflexia showed detrusor sphincter dyssynergia. In 6 patients with sacral cord lesions, 5 patients showed detrusor areflexa. In summary, detrusor sphincter dyssynergia with detrusor hyperreflexia and detrusor areflexia seemed to be specific urodynamcic pattern of suprasacral spinal cord and sacral cord lesion, respectively. But other CNS lesion showed no consistent specific urodynamic pattern.
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이성용,강영택,이정현 국립특수교육원 2012 특수교육연구 Vol.19 No.1
상황이야기 중재는 자폐증 및 발달장애학생의 사회적 기술과 지식을 증가하기 위하여 활용되는 효과적인 교수전략이다. 본 연구는 상황이야기를 중재로 활용한 국내 실험연구들을 메타분석 함으로써, 상황이야기 중재의 효과성을 검증하고 앞으로 효과적인 사회성 기술 교육 프로그램을 개발 및 적용하는 데 필요한 기초 자료를 제시하고자 하였다. 이를 위해 지금까지 국내에서 발표된 상황이야기 중재와 관련된 논문을 조사하고, 분석 논문 선정 기준에 따라 국내 13편의 실험 논문을 최종 분석 대상으로 선정하였다. 본 연구의 메타분석은 3가지 분석 영역에 따라 총 7개의 분석변인(연구대상, 실험환경, 실험설계, 중재유형, 목표기술, 중재효과, 유지 및 일반화 효과)으로 분석하였다. 우선 메타분석의 결과를 살펴보면 상황이야기 중재효과는 전체적으로 중간 크기의 효과를 보였으며, 유지와 일반화는 큰 효과가 있었다. 본 연구의 분석결과는 7개의 분석변인에 따라 구체적으로 제시하였으며, 그 결과는 상황이야기 중재와 효과적인 교수기법을 의미하는 근거기반 실제의 관점에서 논의하였다. The social story is effective intervention strategies for addressing social communication skills, social interaction skills, and behavioral functioning in children with ASD and developmental disabilities. The purpose of this study was to meta-analysis the research literature of social story interventions of children with ASD and developmental disabilities and to provide information and suggestions on social story interventions for future research and practices at schools. A systematic search of the literature from 1993 to 2011 revealed 13 experimental studies published in special education within South Korea. This study analyzed the 13 selected studies in terms of 7 analytical variables: participants, research settings, experimental design, target skills, type of intervention, effects of intervention, maintenance and generation. In particular, results indicated a moderately positive effect for social intervention (mean ES ≤ .80, median PND = 85%). Maintenance (median PND = 100%) and generalization effects (median PND = 100%) revealed large effects. The findings of this study were described in detail based on the 7 analytic variables. The implications of the findings and recommendations for practice and future research on social story interventions were presented.
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