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Modified Fontan Operation with Extracardiac Epicardial Lateral Tunnel; New Surgical Technique (심장 외막 측로관을 이용한 변형 Fontan씨 수술)

  • Lee, Seok-Jae;Kim, Yong-Jin
    • Journal of Chest Surgery
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    • v.26 no.5
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    • pp.422-426
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    • 1993
  • We report three cases of children who underwent definitive conversion to the Fontan circulation using a new surgical technique, Extracardiac Epicardial Lateral Tunnel. This new procedure allows the operation to be performed as a totally extracardiac operation [especially in ventricular dysfunction] and allows it to be performed in a very small atrium and in cases with unsuitable pulmonary venous drainage.Our data suggest that this procedure may achieve satisfactory hemodynamics of the total cavopulmonary connection.

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A Study on the Soundscape design of a memorial space with seaside view (해안가에 기념공간의 사운드스케이프 디자인에 관한 연구)

  • Shin, Hoon;Song, Hyuk;Nam, Gi-Bong;Jang, Gil-Soo
    • KIEAE Journal
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    • v.4 no.1
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    • pp.27-32
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    • 2004
  • in seaside was emphasized on mainly visual elements such as monumental sculptures, towers, landscape and so on. But a memorial space in seaside has peculiar and various sound environments comparing with other spaces. In that sense, there are many rooms to improve soundscape of the space by adding suitable sounds to or by subtracting unsuitable sounds from a memorial space.

Nonlinear PLS Monitoring Applied to An Wastewater Treatment Process

  • Bang, Yoon-Ho;Yoo, Chang-Kyoo;Park, Sang-Wook;Lee, In-Beum
    • 제어로봇시스템학회:학술대회논문집
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    • 2001.10a
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    • pp.102.1-102
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    • 2001
  • In this work, extensions to partial least squares (PLS) for wastewater treatment (WWT) process monitoring are discussed. Conventional data gathered by monitoring WWT systems are usually time varying, high dimensional, correlated and nonlinear, PLS has been shown to be an efficient approach in modeling and monitoring high dimensional and correlated data. To represent dynamic and nonlinear features of the data several kinds of dynamic nonlinear PLS (DNLPLS) models have been proposed. However, the complexity and ambiguity of the models make them unsuitable for WWT monitoring, Recently, dynamic fuzzy PLS (DFPLS) was proposed ...

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Measurement of workload by cardiac arrhythmia (부정맥을 이용한 작업부하의 평가)

  • 박영택;박경수
    • Journal of the Ergonomics Society of Korea
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    • v.2 no.2
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    • pp.3-10
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    • 1983
  • While three subjects were running on treadmill at five different speeds, their heart beat interval times were measured and analyzed. From the analysis, we discovered some relation- ships between workload and cardiac response, especially cardiac arrhythmia. Using these relationships, a physioligical model for estimating workload was developed. Although pulse rate has been considered as a good measure of physical load, this study shows that it is highly subject dependent and therefore unsuitable for task evalution. It is recommended to use range of heart beat interval times rather than pulse rate in the evaluation of light work.

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A Study on the Soundscape design of an observatory in Ttangkkeut (해남 땅끝 전망대의 사운드스케이프 디자인 연구)

  • 신훈;장길수;국찬
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2004.05a
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    • pp.1028-1031
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    • 2004
  • This study aims to design soundscape of a memorial space with seaside view. So far, a memorial space in seaside was mainly emphasized on the visual elements such as monumental sculptures, towers, landscape and so on. But a memorial space in seaside has particular and various sound environments comparing with other places. In that sense, there are many rooms to improve soundscape of the space by adding suitable sounds or by subtracting unsuitable sounds to a memorial space

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A Study on the Effect of Seating & Lighting conditions on Work (작업환경에서 의자 및 조명 조건이 근로에 미치는 영향에 관한 연구)

  • 차상은;김상렬;이승주;김정동;김종석
    • Journal of the Korean Society of Safety
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    • v.13 no.1
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    • pp.131-138
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    • 1998
  • This field study was conducted to survey the effect of seating & lighting conditions on work. The results were as follows ; Discomfortable parts of body caused by unsuitable sitting postures on work were low back 52.05%, leg 15.75%, neck 14.38% and arm 9.59%. Work conditions of sitting postures were needed arm rest, back rest of seat and adjustable seat height. Effect of work efficiency by lighting conditions were statistically significant relationship between glaring state of workstation and lighting state.

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Modification of Miller-Holzworth model for Korea (국내 적용을 위한 Miller-Holzworth 모델의 수정)

  • 장영기
    • Journal of Korean Society for Atmospheric Environment
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    • v.11 no.3
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    • pp.299-302
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    • 1995
  • Many air quality models have been used for Environmental impact assessments. Miller-Holzworth model suggested by Holzworth is a simple air quality model is frequently used for air quality assessments in korea. Miller-Holzworth model suggested by Holzworth is a simple air quality model for the ground-level area source, The model estimates the pollutants concentration averaged over the wind centerline. An error involved in the Miller-Holzworth model was first indentified by Calder in 1977. But the model has been used without correction for unsuitable cases in Korea. This paper corrected that error and modified model formulation for application to urban and rural areas.

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Capsule Endoscopy in Children (소아에서의 캡슐내시경)

  • Ko, Jae-Sung
    • Pediatric Gastroenterology, Hepatology & Nutrition
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    • v.13 no.1
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    • pp.1-6
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    • 2010
  • The small bowel is the most difficult intestinal segment to examine. Radiologic tests are mostly insensitive and double-balloon enteroscopy is unsuitable for the younger child. Capsule endoscopy is a novel wireless method of investigation of the small bowel. The primary indications for capsule endoscopy include evaluation of obscure gastrointestinal bleeding, small bowel Crohn's disease, and polyposis syndromes. Capsule endoscopy offers an accurate and effective means of investigating the small bowel in children. Capsule retention is a potential complication of capsule endoscopy. This review provides the indications, safety, and limitations of wireless capsule endoscopy in children.

Printable low work function cathode for OLED devices

  • Maaninen, Tiina;Tuomikoski, Markus;Maaninen, Arto
    • 한국정보디스플레이학회:학술대회논문집
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    • 2007.08a
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    • pp.721-723
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    • 2007
  • Commercial conductive metal inks are available, but metals used in these have unsuitable work function for efficient OLED device performance. Metals with low work function tend to oxidize easily, which makes it challenging to develop low work function metal inks. In this research we describe printed low work function Al cathode.

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A Study for Musculoskeletal Disorders of Assembly Line Workers

  • Kim, Dae-Sig
    • Journal of Industrial Convergence
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    • v.3 no.2
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    • pp.73-84
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    • 2005
  • Musculoskeletal Disorders are usually caused or aggravated by poor work processes and unsuitable working conditions - that involve repetitive or forceful movements or the maintenance of constrained or awkward postures. The condition is characterized by discomfort and persistent pain. Case and Demographic Characteristics for Work-related Injuries and Illnesses Involving Days Away From Work, 2003. U.S" was examined. Causes of musculoskeletal disorders for assembly line workers were carpal tunnel syndrome(CTS), tendonitis, low back pain, and occupational stress. Recommendations of improvement for productivity are redesign of working conditions, exercise, prevent of musculoskeletal disorders and avoiding stress.

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