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LED 조명의 목표전력량 제어 알고리즘과 에너지절감 효과에 관한 연구
정재용 ( Jae-yong Jung ),한기정 ( Ki-jung Han ),박기웅 ( Ki-woong Park ) 한국정보처리학회 2012 한국정보처리학회 학술대회논문집 Vol.19 No.2
본 연구는 LED 조명제어시스템(LMS)을 이용해서 관리자가 원하는 목표전력량과 LED 조명의 구역별 중요도에 따라 Priority 를 설정 후 실시간으로 전력량을 측정해서 Overload(목표전력량 80% 이상 초과 1 단계, 90% 이상 2 단계) 상황 발생 시 자동으로 LED 조명전력을 차단 또는 디밍함으로써 정전에 대비하고 에너지절감도 가능한 알고리즘과 실증결과에 관한 연구내용을 소개한다.
김철(Kim, Chul),이혜원(Lee, Hye-Won),한기정(Han, Ki-Jung) 대한건축학회 2013 대한건축학회논문집 Vol.29 No.6
The purpose of this study is to develop passive design guidelines for architects to utilize materials on design process of buildings. Passive design is a specific approach centered on architectural design to adapt to natural climate without mechanical heating or cooling, which also maintain tenants’ indoor environmental qualities with lower energy costs. However, in most cases, architects to manage this manner encounter some problems not to know passive design and related knowledge. So, this research was conducted to help designers to get comprehensive abilities in aspects of passive design methods. This study was proceeded by as follows: (1) to summarize domestic climate data and provide initial design strategies (2) to classify passive elements based on journals, examples and simulations (3) to evaluate cooling and heating performance of both design factors and existing buildings. (4) to organize manual frame by using practical scopes to improve availability. (5) to describe design methods by element that include several information modeled on papers, cases and simulations; ‘Windows Design Guideline for Conservation of Building Energy’ etc. In conclusion of this work, guideline frames are consisted of a variety of connection “between elements and supplemental data” that can help architects to design regarding energy performance. Therefore, this book is expected to fortify to be utilized passive design for high-efficient and comfortable buildings.
혈청 칼슘 농도가 담즙내 칼슘 농도의 변화에 미치는 영향
조병채,김영진,박용검,지경천,이정효,장인택,김상준,한기정,백광진 중앙대학교 의과대학 의과학연구소 1998 中央醫大誌 Vol.23 No.1
The purpose of this study was to investigate the relationship between the increased serum calcium changes induced by short-term intravenous calcium infusion and the resultant subsequent changes on total and ionized calcium concentration [Ca_TOT] and [Ca^2+]level, and on bile acid changes in the T-tube bile. Ten patients underwent cholecystectomy, common duct exploration, and T-tube insertion. Serum and biliary calcium concentration were measured over an 7-hour period, before, during, and after a 4-hour intravenous infusion of 10% calcium gluconate. During the infusion, serum total calcium[Ca_TOT] increased from 2.17±0.27 mmol/L to 2.30±0.22 mmol/L and serum free ionized calcium[Ca^2+] increased from the preinfusion state, 1.29±0.10 mmol/L to 1.34±0.15 mmol/L. After the infusion, 60 minite later, biliary total calcium [Ca_TOT] increased from 1.54±0.23 to 1.95±0.37 mmol/L and biliary ionized calcium [Ca^2+] increased from 1.08±0.18 to 1.20±0.09 mmol/L. When the data pooled, increased serum total calcium[Ca_TOT] showed significant correlation with serum ionized calcium[Ca^2+] And also serum ionized calcium[Ca^2+] correlated with biliary total calcium[Ca_TOT] And as to bile acid, increased biliary ionized calcium[Ca^2+] related to decreased bile acid. These results support the hypothesis that calcium is freely permeable at biliary excretory system, and that serum ionized calcium level is one of the determinant elements of biliary calcium level.