43,424 research outputs found

    Comparison of Gummel-Poon and quasi-saturation models in BiCMOS switching

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    The use of Gummel–Poon and quasi–saturation models in BiCMOS switching has been evaluated. The BiCMOS transient responses at different load conditions are examined. The use of the Gummel–Poon model for BiCMOS switching does not account for the charge dynamic in the collector. The simulation result using the Gummel-Poon model could be misleading when the BiCMOS inverter device drives a big load capacitance. © 1998 Taylor and Francis Group, LLC

    Increasing surface ozone concentrations in the background atmosphere of southern China, 1994-2007

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    Author name used in this publication: Wang, T.Author name used in this publication: Poon, C. N.Author name used in this publication: Lam, K. S.Author name used in this publication: Li. Y. S.2009-2010 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishedC

    Liver transplantation for hepatocellular carcinoma

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    Background: Orthotopic liver transplantation (OLT) is the best available option for early hepatocellular carcinoma (HCC), although its application is limited by stringent selection criteria, costs, and deceased donor graft shortage, particularly in Asia, where living donor liver transplant (LDLT) has been developed. Methods: This article reviews the present standards for patient selection represented by size-and-number criteria with particular references to Milan Criteria and novel prediction models based on results achieved in patients exceeding those limits, with consideration of the expanded indication represented by the UCSF Criteria. Results: The expected outcomes after deceased donor liver transplant (DDLT) or LDLT are favorable if predetermined selection criteria are applied. However, selection bias, difference in waiting time, and ischemia-regeneration injuries of the graft among DDLT vs LDLT may influence long-term results. In the article, the differences between East and West in first-line treatments for HCC (resection vs transplantation), indications, and ethics for the donor, are summarized as well as possible novel predictors of tumor biology (especially DNA mutation and fractional allelic loss, FAI) to be considered for better outcome prediction. Conclusions: Liver transplantation remains the most promising product of modern surgery and represents a cornerstone in the management of patients with HCC. © 2007 The Author(s)

    Deformation of 2-step nilmanifolds with abelian complex structures

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    We develop deformation theory for abelian invariant complex structures on a nilmanifold, and prove that in this case the invariance property is preserved by the Kuranishi process. A purely algebraic condition characterizes the deformations leading again to abelian structures, and we prove that such deformations are unobstructed. Various examples illustrate the resulting theory, and the behavior possible in three complex dimensions

    Historia de la muerte y glorioso martyrio del sancto Innocente, que llaman de la Guardia, natural de la ciudad de Toledo ... : con otros tractados de mucha doctrina y preouecho, que son los de la plana siguiente

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    El pie de imp. consta en colofón, en v. de h. 78 y de h. 96 de la primera secuencia de fol.Colofón en v. de h. 43 y de h. 88 de la segunda secuencia de fol.Sign.: ¶\p10\s, A-M\p8\s, ¶\p4\s ; A-L\p8\s, O\p3\s.Ports. con grab xil.Ilustraciones xil.Contiene: Tractado y platica de la ciudad de Toledo a sus vezinos afligidos .../author el maestro Alexio Venegas de Busto ; corregido por ... Rodrigo de Yepes ..., de h. 79 a 96 de la primera secuencia de fol. ; Tractado y descripcion breue y c¯opendiosa de la tierra sancta de Palestina ..., h. 1-43 de de la segunda secuencia de fol., con port. propia ; Tractado de la peregrinacion que Iesu Christo ... hizo en este mundo, h. 44-88 de la segunda secuencia de fol

    Multimodal sensor dataset from vehicle-mounted mobile mapping system for comprehensive urban scenes

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    202511 bcchVersion of RecordOthersWe thank the Shenzhen Park of Hetao Shenzhen-Hong Kong Science and Technology Innovation Cooperation Zone and this research has been supported by the “Theories for Spatiotemporal Intelligence and Reliable Data Analysis” (Project ID: HZQSWS-KCCYB-2024058). This research has also been supported by Otto Poon Charitable Foundation Smart Cities Research Institute, the Hong Kong Polytechnic University (Work Program: CD06); The Hong Kong Polytechnic University (E-RB0Y). The authors are grateful to the anonymous reviewers for their insightful comments on improving this article.PublishedC
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