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전력계통의 고조파 실태조사를 위한 설문서 설계에 관한 연구
최규하,신중린,임한석 建國大學校 附設 産業技術硏究所 1993 논문집 Vol.18 No.-
A design of survey form is studied for the investigations of technical aspects and/or social effects caused by harmonics on the electric power system of Korea. The survey form is aimed to have the function of investigation for the current status of harmonics problems on the power system, as well as the function of giving further understanding of the problems to the field engineers and customers in related sphere. The proposed survey form will give some contribution to build up nation-wide countermeasures to the harmonics problems.
Ha, Joong Gyu,Li, Lan,Lee, Dong heon,Na, Sung hun,Ha, Kwon Soo,Kim, Young-Myeong,Ko, Jung Hwa,Hwang, Jong Yun SAGE Publications 2015 REPRODUCTIVE SCIENCES Vol.22 No.12
<P><B>Objective:</B></P><P>Abnormal spiral artery remodeling during early pregnancy leads to preeclampsia. The proliferation and invasion of trophoblasts in pregnancy are important for spiral artery remodeling. This study examined whether heme oxygenase (HO) by-products (carbon monoxide biliverdin, and iron) play roles in regulating the restoration of proliferation and invasion of human umbilical vein endothelial cells (HUVECs), HTR-8/SV-neo cells originating from first-trimester trophoblasts, 3A(tPA 30-1) obtained from term trophoblasts, and human endometrial stromal cells (HESCs) inhibited by zinc protoporphyrin IX (Znpp-9).</P><P><B>Study Design:</B></P><P>We explored whether HO by-products restored the proliferation and invasion of HUVECs, HTR-8/SVneo cells, 3A(tPA 30-1) cells, and HESCs inhibited by Znpp-9 depending on the oxygen concentration.</P><P><B>Results:</B></P><P>Bilirubin promoted proliferation of HUVECs, HTR-8/SVneo cells, 3A(tPA-30-1) cells, and HESCs under both hypoxic and normoxic conditions. Biliverdin also promoted invasion of HUVECs, HTR-8/SVneo cells, 3A(tPA30-1) cells, and HESCs under both hypoxic and normoxic conditions. Carbon monoxide-releasing molecule 2 promoted the proliferation and invasion of specific cell types depending on the oxygen concentration.</P><P><B>Conclusion:</B></P><P>Our data suggest that HO by-products differentially stimulate the proliferation and invasion of cells involved in pregnancy maintenance. When HO by-products are considered to be stimulants during the invasion and proliferation of such cells, both target cells and the gestational period should be considered.</P>
A Study on Technophobia and Mobile Device Design
Ha, Joong-Gyu,Page, Tom,Thorsteinsson, Gisli The Korea Contents Association 2011 International Journal of Contents Vol.7 No.2
Technophobia is described as the 'abnormal fear or anxiety about the effects of advanced technology', affecting one third of the population, causing health problems and the inability to work efficiently. The development of the mobile phone, both in its design process and its following socioeconomic success, has a prominent effect on our society in general; this point will be explicated in this paper. The negative effects of these developments have also been assessed with questionnaire-based interviews, focus groups and media analysis in order to focus on those who are most susceptible to the effects of technophobia, to discover the possible causes and to develop a solution for overcoming the phobia. The findings of the literature review and empirical research have been debated; the results proved inconclusive. All age and sex and groups displayed levels of anxiety around technology. Therefore, designers cannot afford to abandon these individuals in the future, and attention should be directed into inclusive product design. Therefore, various solutions have been suggested for support for these sufferers, such as tuition and bespoke, 'built to specification' mobile phones.
A Study on Technophobia and Mobile Device Design
Joong Gyu Ha,Tom Page,Gisli Thorsteinsson 한국콘텐츠학회 2011 International Journal of Contents Vol.7 No.2
Technophobia is described as the ‘abnormal fear or anxiety about the effects of advanced technology’, affecting one third of the population, causing health problems and the inability to work efficiently. The development of the mobile phone, both in its design process and its following socioeconomic success, has a prominent effect on our society in general; this point will be explicated in this paper. The negative effects of these developments have also been assessed with questionnaire-based interviews, focus groups and media analysis in order to focus on those who are most susceptible to the effects of technophobia, to discover the possible causes and to develop a solution for overcoming the phobia. The findings of the literature review and empirical research have been debated; the results proved inconclusive. All age and sex and groups displayed levels of anxiety around technology. Therefore, designers cannot afford to abandon these individuals in the future, and attention should be directed into inclusive product design. Therefore, various solutions have been suggested for support for these sufferers, such as tuition and bespoke, ‘built to specification’ mobile phones