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  1. No Access

    Article

    Observation and Modeling of Brittle Fracture Initiation in a Micro-Heterogeneous Material

    Observations and characterization of brittle fracture initiation in a micro-heterogeneous material (sandstone) are conducted using the standard indirect tensile strength test. Acoustic emissions, optical micro...

    H. Jasarevic, A. Chudnovsky, J.W. Dudley, G.K. Wong in International Journal of Fracture (2009)

  2. No Access

    Chapter and Conference Paper

    Decompressive craniectomy for hemispheric infarction: predictive factors for six month rehabilitation outcome

    Background Decompressive craniectomy after hemispheric infarction has been shown to reduce mortality and functional outcome in selected patients. However, the optimal timing for surgery a...

    G. K. Wong, J. Kung, S. C. Ng, X. L. Zhu, W. S. Poon in Acta Neurochirurgica Supplements (2009)

  3. No Access

    Chapter and Conference Paper

    Intravenous magnesium sulfate after aneurysmal subarachnoid hemorrhage: a meta-analysis of published data

    After the pilot study from Boet and Mee published in Neurosurgery in 2000, further pilot studies has been published on using magnesium sulfate infusion in patients after aneurysmal subarachnoid hemorrhage. We ...

    G. K. Wong, W. S. Poon, M. T. V. Chan in Cerebral Vasospasm (2008)

  4. No Access

    Chapter and Conference Paper

    Hypomagnesemia after ruptured middle cerebral artery aneurysms: predictive factor and pathophysiological implication

    Hypomagnesemia was frequently present after aneurysmal subarachnoid haemorrhage. It was found in 38% of patients admitted after aneurysmal SAH and predicted the occurrence of delayed cerebral ischemia. The pat...

    G. K. Wong, W. S. Poon, M. T. V. Chan in Cerebral Vasospasm (2008)

  5. No Access

    Article

    Epitaxial stabilization of orthorhombic cuprous oxide films on MgO(110)

    Continuous epitaxial films of cuprous oxide (Cu2O) have been formed by the thermal oxidation of 1.5-μm-thick Cu metal films deposited on MgO(110) substrates. These films melted at 1118 °C in air, in agreement wit...

    Paul R. Markworth, R. P. H. Chang, Y. Sun, G. K. Wong… in Journal of Materials Research (2001)

  6. No Access

    Article

    α-Sn thin film grown on GaAs substrate by MBE and investigation of its multiquantum well structure

    α-Sn thin films have been grown on GaAs (001) single crystal substrates by molecular beam epitaxy (MBE). The α-Sn growth process has been characterizedin situ by reflection high energy electron diffraction (RHEED...

    **njian Yi, Jianhua Hao, **nyu Zhang, G. K. Wong in Science in China Series A: Mathematics (1998)

  7. No Access

    Article

    Deposition of Potassium Niobate Thin Films by Metalorganic Chemical Vapor Deposition and their Nonlinear Optical Properties

    Ferroelectric potassium niobate thin films have been deposited by conventional, low pressure metalorganic chemical vapor deposition on several types of oxide substrates. The films were epitaxial with a c-axis ...

    M. J. Nystrom, B. W. Wessels, J. Chen, D. Studebaker… in MRS Online Proceedings Library (1995)

  8. No Access

    Article

    Interface structure between Bi and CdTe in molecular beam epitaxially Grown Bi/CdTe and Bi/Bi1−xSbx superlattices

    We report cross-sectional high resolution transmission electron microscopy studies of the interface structure in Bi/CdTe and Bi/Bi1−x Sbx superlattice films deposited on (111) CdTe by molecular beam epitaxy. Resu...

    J. Chen, A. di Venere, X. J. Yi, C. L. Hou, H. C. Wang… in Journal of Electronic Materials (1994)

  9. No Access

    Article

    Deposition of Strontium Barium Niobate Thin Films by Metal-Organic Chemical Vapor Deposition and Their Nonlinear Optical Properties

    Single phase, highly textured strontium barium niobate (SBN) thin films were deposited by low pressure metal-organic chemical vapor deposition on both crystalline and amorphous substrates. The metal precursors...

    M. J. Nystrom, B. W. Wessels, D. A. Neumayer, T. J. Marks… in MRS Online Proceedings Library (1994)

  10. No Access

    Article

    Synthesis and Nonlinear Optical Characteristics of Chromophore-Functionalized Polymers Having Chromophore-Centered Hydrogen-Bonding and Crosslinking Groups

    In this study, we report the synthesis and characterization of a new, systematically designed class of second-order NLO polymers in which the appended chromophoric substituent is modified (hydroxylated) to all...

    Y. **, S. H. Carr, T. J. Marks, W. Lin, G. K. Wong in MRS Online Proceedings Library (1992)

  11. No Access

    Chapter

    Synthetic Approaches to Stable and Efficient Polymeric Frequency Doubling Materials. Second-Order Nonlinear Optical Properties of Poled, Chromophore-Functionalized Glassy Polymers

    Materials exhibiting highly nonlinear optical (NLO) characteristics are currently the focus of intense scientific and technological interest (1–5). While such materials have traditionally been inorganic substa...

    C. Ye, N. Minami, T. J. Marks, J. Yang… in Nonlinear Optical Effects in Organic Polym… (1989)

  12. No Access

    Article

    Rational Construction of Polymeric Nonlinear Optical Materials. Properties of Chromophore-Functionalized Polystyrenes

    Processable polymeric nonlinear optical materials can be synthesized by functionalizing a glassy macromolecule with chromophores having large quadratic hyperpolarizabilities, followed by poling in an electric ...

    C. Ye, N. Minami, T. J. Marks, J. Yang, G. K. Wong in MRS Online Proceedings Library (1987)