• 제목/요약/키워드: Columbia

검색결과 665건 처리시간 0.031초

(100) Textured Si Films with Controlled Microstructures Obtained via Hybrid SLS

  • Wilt, P.C. Van Der;Chitu, A.M.;Turk, B.A.;Chung, U.J.;Limanov, A.B.;Im, James S.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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    • pp.768-771
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    • 2006
  • Uniformity and performance characteristics of LTPS TFTs are important parameters for making advanced active-matrix displays. In this paper, we describe an SLS-based crystallization approach for producing orientation-controlled Si films with reduced concentrations of planar defects that stand to potentially deliver unprecedented levels of device uniformity and performance. Specifically, a 2-step process referred to as hybrid SLS has been developed that produces a variety of high-quality {100} surface-oriented Si films.

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Clinical Applications of Dual-Energy CT

  • Saira Hamid;Muhammad Umer Nasir;Aaron So;Gordon Andrews;Savvas Nicolaou;Sadia Raheez Qamar
    • Korean Journal of Radiology
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    • 제22권6호
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    • pp.970-982
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    • 2021
  • Dual-energy CT (DECT) provides insights into the material properties of tissues and can differentiate between tissues with similar attenuation on conventional single-energy imaging. In the conventional CT scanner, differences in the X-ray attenuation between adjacent structures are dependent on the atomic number of the materials involved, whereas in DECT, the difference in the attenuation is dependent on both the atomic number and electron density. The basic principle of DECT is to obtain two datasets with different X-ray energy levels from the same anatomic region and material decomposition based on attenuation differences at different energy levels. In this article, we discuss the clinical applications of DECT and its potential robust improvements in performance and postprocessing capabilities.

Microbe Hunting: A Curious Case of Cryptococcus

  • Bartlett Karen H.;Kidd Sarah;Duncan Colleen;Chow Yat;Bach Paxton;Mak Sunny;MacDougall Laura;Fyfe Murray
    • 한국환경보건학회지
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    • 제31권3호
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    • pp.199-206
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    • 2005
  • C. neoformans-associated cryptococcosis is primarily a disease of immunocompromised persons, has a world-wide distribution, and is often spread by pigeons in the urban environment. In contrast, C. gattii causes infection in normal hosts, has only been described in tropical and semi-tropical areas of the world, and has a unique niche in river gum Eucalyptus trees. Cryptococcosis is acquired through inhalation of the yeast propagules from the environment. C. gattii has been identified as the cause of an emerging infectious disease centered on Vancouver Island, British Columbia, Canada. No cases of C. gattii-disease were diagnosed prior to 1999; the current incidence rate is 36 cases per million population. A search was initiated in 2001 to find the ecological niche of this basidiomycetous yeast. C. gattii was found in the environment in treed areas of Vancouver Island. The highest percentage of colonized-tree clusters were found around central Vancouver Island, with decreasing rates of colonization to the north and south. Climate, soil and vegetation cover of this area, called the Coastal Douglas fir biogeoclimatic zone, is unique to British Columbia and Canada. The concentration of airborne C. gattii was highest in the dry summer months, and lowest during late fall, winter, and early spring, months which have heavy rainfall. The study of the emerging colonization of this organism and subsequent cases of environmentally acquired disease will be informative in planning public health management of new routes of exposure to exotic agents in areas impacted by changing climate and land use patterns.

Review of the UBC Porcine Model of Traumatic Spinal Cord Injury

  • Kim, Kyoung-Tae;Streijger, Femke;Manouchehri, Neda;So, Kitty;Shortt, Katelyn;Okon, Elena B.;Tigchelaar, Seth;Cripton, Peter;Kwon, Brian K.
    • Journal of Korean Neurosurgical Society
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    • 제61권5호
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    • pp.539-547
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    • 2018
  • Traumatic spinal cord injury (SCI) research has recently focused on the use of rat and mouse models for in vivo SCI experiments. Such small rodent SCI models are invaluable for the field, and much has been discovered about the biologic and physiologic aspects of SCI from these models. It has been difficult, however, to reproduce the efficacy of treatments found to produce neurologic benefits in rodent SCI models when these treatments are tested in human clinical trials. A large animal model may have advantages for translational research where anatomical, physiological, or genetic similarities to humans may be more relevant for pre-clinically evaluating novel therapies. Here, we review the work carried out at the University of British Columbia (UBC) on a large animal model of SCI that utilizes Yucatan miniature pigs. The UBC porcine model of SCI may be a useful intermediary in the pre-clinical testing of novel pharmacological treatments, cell-based therapies, and the "bedside back to bench" translation of human clinical observations, which require preclinical testing in an applicable animal model.

Texture Analysis of Directionally-Solidified Si Films Obtained via Line-Scan SLS

  • Chitu, A.M.;Wilt, P.C. Van Der;Chung, U.J.;Turk, B.A.;McCreary, V.M.;Limanov, A.B.;Im, James S.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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    • pp.763-767
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    • 2006
  • Directionally solidified Si films obtained via line-scan SLS can lead to attainment of high-mobility TFTs. The crystallographic texture of the resultant materials can potentially be an important factor because the spatial details thereof may impact the overall device uniformity. Here, we present EBSD analysis of these materials that reveal the existence of relatively large domains with different textures and differing amounts of defects, which in turn, may adversely affect device uniformity.

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Stylar glycoproteins bind to S-RNase in vitro

  • Cruz-Garcia, F.;Nathan Hancock, C.;McClure, B.;Kim, D.
    • 한국식물생명공학회:학술대회논문집
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    • 한국식물생명공학회 2005년도 추계학술대회 및 한일 식물생명공학 심포지엄
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    • pp.193-193
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    • 2005
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