비정규직 근로가 건강에 미치는 영향

김일호 한국조사연구학회 2007 춘계학술대회 발표논문집 Vol.2007 No.-

냉장고엘리베이트 외 1편

김일호 계간 서정시학 2019 서정시학 Vol.29 No.1

[Life] Wine-흙을 알면 와인 맛이 보인다

김일호 연합뉴스 동북아센터 2016 마이더스 Vol.2016 No.3

Synthesis and thermoelectric properties of Cu-dispersed Bi2Te2.7Se0.3

김일호,최순목,서원선,정동익,강형 한양대학교 세라믹연구소 2012 Journal of Ceramic Processing Research Vol.13 No.2

Cu-dispersed Bi2Te2.7Se0.3 nanocomposites were prepared by Cu(OAc)2 acetate decomposition and their thermoelectric properties were evaluated. The electrical conductivity did not change significantly by the Cu nanoparticle dispersion because the doping effect by Cu nanoparticles did not occur effectively to increase the carrier concentration and Cu nanoparticles were too small to introduce charge carrier scattering. All specimens had a negative Seebeck coefficient, which confirmed that the electrical charge was transported mainly by electrons. The absolute Seebeck coefficient was remarkably increased by the Cu dispersion and slightly reduced with an increase in the temperature. The power factor values for Cu-dispersed Bi2Te2.7Se0.3were maintained higher in the whole temperature range, and the maximum power factor at 323 K reached around two times higher than that of Bi2Te2.7Se0.3. The thermal conductivity of Cu-dispersed Bi2Te2.7Se0.3 was slightly increased with an increase in the temperature because of the electronic contribution, and the Cu dispersion could not reduce it. The thermoelectric figure of merit was enhanced remarkably over a wide temperature range of 323~523 K due to the high power factor and the maintenance of a low thermal conductivity.

고/액 계면에서의 Peltier 열 측정 및 결정성장에의 응용 II : 측정과 응용

김일호,장경욱,이동희,Kim, Il-Ho,Jang, Kyung-Wook,Lee, Dong-Hi 한국재료학회 1999 한국재료학회지 Vol.9 No.11

$\textrm{Bi}_{2}\textrm{Te}_{3}$의 고/액 계면을 통하여 전류밀도와 방향을 달리 하면서 통전시켰을 때 발생하는 고상, 액상 및 고/액 계면에서의 미소 온도변화를 측정하였다. 이 냉각(가열) 효과는 전류밀도, 통전방향 및 시간에 따라 다르게 나타났으며, 온도변화에 미치는 Peltier 열, Thomson 열 및 Joule 열의 영향을 이론 및 실험에 의해 각각 분류하였다. $\textrm{Bi}_{2}\textrm{Te}_{3}$의 고/액상간의 Peltier 계수는 -1.10$\times\textrm{10}^{-1}$V이었으며, 고상과 액상의 Thomson 계수는 각각 7.31\times\textrm{10}^{-4}V/K와 5.77\times\textrm{10}^{-5}V/K이었다. 직류를 통전하면서 Bi$_2$Te$_3$결정을 성장한 결과, 고상에서 액상으로 통전한 경우, Peltier 냉각에 의한 온도구배의 상승으로 방향성이 향상된 결정을 얻을 수 있었지만, 전류의 방향을 반대로 하면, 결정성 향상에 별 도움을 주지 못하였다. Thermoelectric effects on the temperature changes at the solid- and liquid-phase and its interface were studied by using the unidirectional solidification of $\textrm{Bi}_{2}\textrm{Te}_{3}$. Cooling or heating effects measured with current density. polarity and current passing time were quite different. By separating sole Peltier, Thomson and Joule heat theoretically and experimentally, the Peltier coefficient at the solid/liquid interface of $\textrm{Bi}_{2}\textrm{Te}_{3}$ was -1.10$\times\textrm{10}^{-1}$V, and the Thomson coefficients of solid- and liquid-phase were 7.31\times\textrm{10}^{-4}V/K, 5.77\times\textrm{10}^{-5}V/K, respectively. When D.C. passed from solid-phase to liquid-phase during the crystal growth of $\textrm{Bi}_{2}\textrm{Te}_{3}$ the crystal with more directionality was obtained owing to increase of the temperature gradient in liquid by the Peltier cooling. But in reverse current direction, the crystallinity was not changed significantly.

Chalcogenide계 열전재료

김일호,Kim, Il-Ho 한국전기전자재료학회 2011 전기전자재료 Vol.24 No.7

현재 개발 중인 Chalcogenide계 열전재료 중에서, 이방성 재료인 Thallium chalcogenide, Alkalimetal bismuth chalcogenide, Bismuth telluride와 등방성 재료인 Lead telluride, Silver antimony telluride, TAGS, LAST 및 SALT를 소개하였고, 이 재료들에 대한 연구 동향을 살펴보았다. Chalcogenide는 S, Se, Te 및 다른 원소와의 다양한 조합에 의해, 넓은 온도범위에서 열전재료로 응용하기 위한 밴드갭 에너지의 조절이 가능하다. 또한 합성공정에 따른 상변태, 석출 등 구조변화에 따른 열전특성의 변화를 기대할 수 있어 열전재료 개발 초기부터 활발한 연구가 진행되어 왔다. 과거의 전통적인 Chalcogenide계 열전재료뿐만 아니라, Chalcogenide계 열전 신소재에 대해서도 살펴보았다. Chalcogenide는 전자적, 광학적, 열적 성질 등 특성이 독특하고 변화가 무궁무진하여 아주 매력적이기 때문에, 앞으로도 계속 열전재료로서 각광받는 물질군으로 판단된다. 그림 11에 현재까지 ZT의 최댓값이 1이 넘는다고 보고된 열전재료의 성능지수를 요약하였다.

Age and Gender Differences in the Relation of Chronic Diseases to Activity of Daily Living (ADL) Disability for Elderly South Koreans: Based on epresentative Data

김일호 대한예방의학회 2011 Journal of Preventive Medicine and Public Health Vol.44 No.1

Objectives: This study investigated the gender and age differential effect of major chronic diseases on activity of daily living (ADL) disability. Methods: Surveyfreq and Surveylogistic regression analyses were employed on the 2005 Korean National Health and Nutrition Examination Survey (KNHANES) with a sample of 3,609 persons aged 65 - 89. Results: After adjusting for potential covariates, stroke, among elderly men more so than women, had a 2-3 times greater odds of engendering ADL disability in the 65-69 (p < 0.05) and 70-79 age groups (p < 0.01). In comparison to elderly women, cancer, diabetes, and incontinence in elderly men was associated with a higher risk of ADL disability in the 70 - 79age group (p < 0.05), and this association was also observed for pulmonary disease in the 80-89 age group. Among elderly women, however, a significant association between incontinence and ADL disability was identified in all three age groups. In addition, this association was found in pulmonary disease and diabetes in elderly women aged 70 - 79 years. Significant gender differences were observed in the association between stroke in the 60 - 79 age group and cancer in the 70 - 79 age group. Conclusions: Age and gender differences were observed in the effect of chronic diseases on ADL disability.

Gender, Professional and Non-Professional Work, and the Changing Pattern of Employment-Related Inequality in Poor Self-Rated Health, 1995-2006 in South Korea

김일호,강영호,조성일,천희란,Carles Muntaner 대한예방의학회 2011 Journal of Preventive Medicine and Public Health Vol.44 No.1

Objectives: We examined gender differential changes in employment-related health inequalities according to occupational position (professional/nonprofessional) in South Korea during the last decade. Methods: Data were taken from four rounds of Social Statistical Surveys of South Korea (1995, 1999, 2003, and 2006)from the Korean National Statistics Office. The total study population was 55435 male and 33 913 female employees aged 25-64. Employment arrangements were divided into permanent, fixed-term, and daily employment. Results: After stratification according to occupational position (professional/nonprofessional) and gender, different patterns in employment - related health inequalities were observed. In the professional group, the gaps in absolute and relative employment inequalities for poor self-rated health were more likely to widen following Korea’s 1997 economic downturn. In the nonprofessional group, during the study period, graded patterns of employment-related health inequalities were continuously observed in both genders. Absolute health inequalities by employment status, however,decreased among men but increased among women. In addition, a remarkable increase in relative health inequalities was found among female temporary and daily employees (p = 0.009, < 0.001, respectively), but only among male daily employees (p = 0.001). Relative employment-related health inequalities had clearly widened for female daily workers between 2003 and 2006 (p = 0.047). The 1997 Korean economic downturn, in particular, seemingly stimulated a widening gap in employment health inequalities. Conclusions: Our study revealed that whereas absolute health inequalities in relation to employment status increased in the professional group, relative employment-related health inequalities increased in the nonprofessional group, especially among women. In view of the high concentration of female nonstandard employees, further monitoring of inequality should consider gender specific patterns according to employee’s occupational and employment Objectives: We examined gender differential changes in employment-related health inequalities according to occupational position (professional/nonprofessional) in South Korea during the last decade. Methods: Data were taken from four rounds of Social Statistical Surveys of South Korea (1995, 1999, 2003, and 2006)from the Korean National Statistics Office. The total study population was 55435 male and 33 913 female employees aged 25-64. Employment arrangements were divided into permanent, fixed-term, and daily employment. Results: After stratification according to occupational position (professional/nonprofessional) and gender, different patterns in employment - related health inequalities were observed. In the professional group, the gaps in absolute and relative employment inequalities for poor self-rated health were more likely to widen following Korea’s 1997 economic downturn. In the nonprofessional group, during the study period, graded patterns of employment-related health inequalities were continuously observed in both genders. Absolute health inequalities by employment status, however,decreased among men but increased among women. In addition, a remarkable increase in relative health inequalities was found among female temporary and daily employees (p = 0.009, < 0.001, respectively), but only among male daily employees (p = 0.001). Relative employment-related health inequalities had clearly widened for female daily workers between 2003 and 2006 (p = 0.047). The 1997 Korean economic downturn, in particular, seemingly stimulated a widening gap in employment health inequalities. Conclusions: Our study revealed that whereas absolute health inequalities in relation to employment status increased in the professional group, relative employment-related health inequalities increased in the nonprofessional group, especially among women. In view of the high concentration of female nonstandard employees, further monitoring of inequality should consider gender specific patterns according to employee’s occupational and employment status.

UV를 이용한 수중 의약품 성분의 제거에 관한 연구

김일호,타나카히로아키,야마시타나오유키,이와사키타츠유키,요시노키요시,타쿠보타케시 대한환경공학회 2006 대한환경공학회 학술발표논문집 Vol.2006 No.12

Emitter Structure Dependence on the Performance of AlGaAs / GaAs HBTs

김일호,이태우,정준오,박문평,박성호,편광의 대한전자공학회 1997 대한전자공학회 학술대회 Vol.1997 No.1