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Now showing items 1 - 16 of 672

  • Structural properties and magnetism of Fe overlayers on GaAs(0 0 1) surface

    Soon C. Hong   Moon S. Chung   Byung-G. Yoon   Jae I. Lee  

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  • Enhancement of magnetic moment by interface effect: Co/Pd(111)

    Soon C. Hong   T.H. Rho   Jae Il Lee  

    In this study we have investigated the magnetism and electronic structure of Pd-covered 1 ML Co on Pd(111) surface with different thicknesses of Pd buffer layer using the local spin density FLAPW method. It has been calculated that the Pd-covering enhances the magnetic moments at the Co layers up to 2.10 mu B, due to hybridization between Co d and Pd d bands. The interface Pd atoms are magnetized to about 0.30 mu B. The magnetic moment increases little by little with thickness of Pd buffer layer. The LDOS indicates the magnetic moment enhancement at the interface Co layer comes from the strong band hybridization
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  • Proximity effects of overlayers on surface magnetism: Al adsorbed on Fe(001)

    Soon C. Hong   Jae Il Lee   A.J. Freeman  

    Magnetic moments and magnetic hyperfine fields at the Fe(001) surface covered by a simple metal, Al, have been calculated employing the full potential linearized augmented plane wave (FLAPW) method. From total energy calculations the Al-Fe bond-lengths is found to be 4.53 au which is smaller than those of some bulk Al-Fe compounds by about 4%. The magnetic moment (1.38 mu B) is greatly reduced compared to those of clean Fe(001) and bulk Fe, by 54% and 38% respectively. From the energy band structure and density of states this reduction appears to come from the hybridization of Al-s, p and Fe-d electrons. As regards the Fermi contact hyperfine interaction, the Al-s, p electrons promote the conduction electrons of the interface Fe to have a negative indirect polarization (-46 kG). As result of this negative contribution, the magnitude of the magnetic hyperfine field (-235 kG) at the interface Fe becomes comparable to that (-252 kG) of clean Fe(001) despite the large reduction of magnetic moment
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  • Kam C. Wong, Policing in Hong Kong

    Boateng   F. D.  

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  • Kam C. Wong, Policing in Hong Kong

    Boateng, F. D.  

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  • Prediction of urine volume soon after birth using serum cystatin C

    Kasamatsu, Atsushi; Ohashi, Atsushi; Tsuji, Shoji; Okada, Hidetaka; Kanzaki, Hideharu; Kaneko, Kazunari  

    Urine volume is an important clinical finding particularly during the early neonatal period. Oliguria is not a sign of impaired renal function but also a predictive factor for various complications and prognoses. It has been postulated that serum cystatin C (S-CysC) is a more sensitive biomarker for renal function than serum creatinine (S-Cr) in both adults and children. The objective of the current study was to investigate whether urine volume during 24 h after birth can be predicted using S-CysC. The subjects were 87 infants. The average gestational age was 34.7 +/- 2.9 weeks and the average birth weight was 2135 +/- 614 g. Blood samples were obtained from either the umbilical cord or the peripheral veins or artery of the newborn at birth. Data regarding the amount of urine volume and fluid intake during the first 24 h of life, maternal S-Cr and S-CysC levels within 48 h before delivery, and neonatal S-Cr and S-CysC levels at birth were collected from the medical records. A significantly positive correlation was observed between maternal and neonatal S-Cr levels (r =3D 0.84, p < 0.0001) but not between maternal S-Cr levels and neonatal S-CysC levels (r =3D -0.069, p =3D 0.52). A significant negative correlation was seen between neonatal S-CysC levels and urine volume (r =3D -0.47, p < 0.0001). The present study findings indicate that it may be possible to use S-CysC levels at birth to predict urine volume during the first 24 h of life.
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  • Prediction of urine volume soon after birth using serum cystatin C

    Kasamatsu, Atsushi   Ohashi, Atsushi   Tsuji, Shoji   Okada, Hidetaka   Kanzaki, Hideharu   Kaneko, Kazunari  

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  • Limitations of measuring c(v) by oedometer in Hong Kong granitic soils

    Wong, Hong-yau  

    Over recent years in Hong Kong, engineers have become concerned over the very low c(v) (coefficient of consolidation) as measured by oedometer for permeable granular soils. The aim of the present paper is therefore to explore the underlying reasons for such low c(v) values and the validity of an alternative measurement by isotropic consolidation in a triaxial cell (IC). Starting from a hypothetical curve relating consolidation to square root time, it can be seen that, with existing testing standards requiring an accuracy of 1 s only in the time-measuring device, it is impossible for permeable soils with t(90) (90% consolidation time) of less than about 1 s to have any consolidation readings recorded for determination of t(90). The apparent t(90) determined from measurable records will be considerably higher, yielding c(v) of the same order as those by oedometer. However, c(v) from a hypothetically low t(90) is more realistic, being the same order as those from IC. The validity of measuring c(v) by IC is justified, as the ratio of c(v) measured by oedometer to that derived by IC is of the same order of magnitude from both experimental results and theoretical evaluation, for a linear elastic, isotropic and homogeneous soil.
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  • Review of Kam C. Wong,Policing in Hong Kong

    Wayne Wing Lun Chan  

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  • Review of Kam C. Wong,Policing in Hong Kong

    Wayne Wing Lun Chan  

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  • Flora of Hong Kong. Vol. 3by Nian-he Xia; Kwok-leung Yipl; Patrick C. C. Lai

    Review by: Rudolf Schmid and Jinshuang Ma  

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  • Flora of Hong Kong. Vol. 3by Nian-he Xia; Kwok-leung Yipl; Patrick C. C. Lai

    Review by: Rudolf Schmid and Jinshuang Ma  

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  • The scale of production in Hong Kong, c. 1950-1980

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  • Viral hepatitis C in Hong Kong

    Leung, N   BNurs, CC   Tam, JS  

    Objective: Hepatitis C virus (HCV) infection can lead to serious liver disease. Its medico-socio-economic burden on society can be immense. This study investigates the epidemiology of HCV infection in Hong Kong. Methods: Data from the Department of Health, relevant publications from Medline search and data from two acute hospitals were reviewed. Results: The prevalence of anti-HCV among voluntary blood donors is stable, remaining at approximately 0.035-0.099% over the past 10 years, and is higher in the older age group. Among the high-risk groups, the anti-HCV prevalence is as follows: (1) hospital patients 0.8%, (2) intravenous drug users 46.0%, (3) patients infected with HIV 7.9%, (4) children with transfusion-dependent hematologic disease 16.3%, (5) patients on continuous ambulatory peritoneal dialysis 1.8%, patients on hemodialysis 16.4%, recipients of kidney transplants 6.2% and (6) patients with hepatocellular carcinoma 7.3%. Among blood donors, 58.8% were infected with HCV genotype 1b and 27.0% with genotype 6a. Genotype 6a is particularly common among intravenous drug users. Conclusion: Hong Kong has a low prevalence of HCV infection. Patients are mostly infected through transfusion with blood or products prior to the introduction of anti-HCV screening to the blood transfusion service. Illicit drug use constitutes another significant risk. Since 1997, there has been a great increase in population movement between China and Hong Kong which might affect the epidemiology of HCV infection. Copyright (C) 2006 S. Karger AG, Basel.
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  • [Flora of Hong Kong. Vol. 2]by Nian-he Xia; Kwok-leung Yip; Patrick C. C. Lai

    Review by: Rudolf Schmid and Jinshuang Ma  

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  • [Flora of Hong Kong. Vol. 2]by Nian-he Xia; Kwok-leung Yip; Patrick C. C. Lai

    Review by: Rudolf Schmid and Jinshuang Ma  

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