Vincent Wong - Academia.edu (original) (raw)

Papers by Vincent Wong

Research paper thumbnail of A new QoS provisioning method for adaptive multimedia in cellular wireless networks

IEEE INFOCOM 2004, 2004

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Research paper thumbnail of Performance enhancements of combining QoS provisioning and location management in wireless cellular networks

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE, 2002

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Research paper thumbnail of A framework of secure location service for position-based ad hoc routing

Proceedings of the 1st ACM international workshop on Performance evaluation of wireless ad hoc, sensor, and ubiquitous networks - PE-WASUN '04, 2004

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Research paper thumbnail of Joint Optimal Channel Assignment and Congestion Control for Multi-channel Wireless Mesh Networks

2006 IEEE International Conference on Communications, 2006

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Research paper thumbnail of A Constrained MDP-Based Vertical Handoff Decision Algorithm for 4G Wireless Networks

2008 IEEE International Conference on Communications, 2008

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Research paper thumbnail of Higher Estimated Net Endogenous Acid Production May Be Associated with Increased Prevalence of Nonalcoholic Fatty Liver Disease in Chinese Adults in Hong Kong

PLOS ONE, 2015

Nonalcoholic fatty liver disease (NAFLD) has been associated with reduced growth hormone levels a... more Nonalcoholic fatty liver disease (NAFLD) has been associated with reduced growth hormone levels and signaling. Such hormonal changes also occur in metabolic acidosis. Since mild metabolic acidosis can be diet induced, diet-induced acid load may constitute a nutritional factor with possible influence on NAFLD development. This study explored whether a higher diet-induced acid load is associated with an increased likelihood of NAFLD. Apparently healthy Chinese adults (330 male, 463 female) aged 19-72 years were recruited through population screening between 2008 and 2010 in a cross-sectional population-based study in Hong Kong. Estimated net endogenous acid production (NEAP) was calculated using Frassetto's method and potential renal acid load (PRAL) was calculated using Remer's method based on dietary data from a food frequency questionnaire. NAFLD was defined as intrahepatic triglyceride content at >5% by proton-magnetic resonance spectroscopy. Possible advanced fibrosis was defined as liver stiffness at >7.9 kPa by transient elastography. Multivariate logistic regression models were used to examine the association between each measure of dietary acid load and prevalent NAFLD or possible advanced fibrosis with adjustment…

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Research paper thumbnail of Screening diabetic patients for non-alcoholic fatty liver disease with controlled attenuation parameter and liver stiffness measurements: a prospective cohort study

Gut, Jan 14, 2015

Type 2 diabetes is an important risk factor for non-alcoholic fatty liver disease (NAFLD), but cu... more Type 2 diabetes is an important risk factor for non-alcoholic fatty liver disease (NAFLD), but current guidelines provide conflicting recommendations on whether diabetic patients should be screened for NAFLD. We therefore studied the strategy of screening diabetic patients by FibroScan. Liver fat and fibrosis were assessed by controlled attenuation parameter (CAP) and liver stiffness measurements (LSM) by FibroScan at a diabetic centre for patients from primary care and hospital clinics. Probe-specific LSM cut-offs were used to detect advanced fibrosis. Of 1918 patients examined, 1799 (93.8%) had valid CAP and 1884 (98.2%) had reliable LSM (1770 with the M probe and 114 with the XL probe). The proportion of patients with increased CAP and LSM was 72.8% (95% CI 70.7% to 74.8%) and 17.7% (95% CI 16.0% to 19.5%), respectively. By multivariable analysis, female gender, higher body mass index, triglycerides, fasting plasma glucose and alanine aminotransferase (ALT) and non-insulin use we...

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Research paper thumbnail of Bounds for Lifetime Maximization with Multiple Sinks in Wireless Sensor Networks

2007 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, 2007

In wireless sensor networks, the reliability can be increased when data is sent to multiple sinks... more In wireless sensor networks, the reliability can be increased when data is sent to multiple sinks. Data information transmitted to each sink can be considered as a commodity. The objective is to determine the route between each source and sink such that the lifetime of the commodity is maximized. In this paper, we derive the upper and lower bounds for

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Research paper thumbnail of Link-by-link feedback mechanism for intra-session random linear network coding in wireless sensor networks

2012 IEEE International Conference on Communications (ICC), 2012

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Research paper thumbnail of On decoding delay of intra-session random linear network coding for line networks

2012 IEEE International Symposium on Information Theory Proceedings, 2012

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Research paper thumbnail of Maximum-Lifetime Coding Subgraph for Multicast Traffic in Wireless Sensor Networks

IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference, 2008

It has been shown that network coding can lead to significant improvement in network capacity and... more It has been shown that network coding can lead to significant improvement in network capacity and reduction in power consumption for multicast traffic in wireless networks. In this paper, we study the problem of supporting multicast in wireless sensor networks. The objective is to jointly maximize the network lifetime and minimize the number of packets undergoing network coding. We formulate

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Research paper thumbnail of Secure Location Verification for Vehicular Ad-Hoc Networks

IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference, 2008

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Research paper thumbnail of A Novel Scheduling Algorithm for Video Traffic in High-Rate WPANs

IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference, 2007

The emerging high-rate wireless personal area net- work (WPAN) technology is capable of supportin... more The emerging high-rate wireless personal area net- work (WPAN) technology is capable of supporting high-speed and high-quality real-time multimedia applications. In particular, MPEG-4 video streams are deemed to be a widespread traffic type. However, in the current IEEE 802.15.3 standard for media access control (MAC) of high-rate WPANs, the implementation details of some key issues such as scheduling and quality

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Research paper thumbnail of Distributed Multi-Interface Multi-Channel Random Access

IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference, 2008

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Research paper thumbnail of Structural and optical properties of InAs bilayer quantum dots grown at constant growth rate and temperature

Journal of Crystal Growth, 2011

Bilayer quantum dots (BQDs) are interesting structures for long wavelength emission due to its ab... more Bilayer quantum dots (BQDs) are interesting structures for long wavelength emission due to its ability to tune the areal density and dot size separately. However, wide implementation of BQDs is hindered by the complicated growth procedures, which involve two sets of growth rate and temperature for the respective QD layers. We had recently reported the optical properties of the BQDs

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Research paper thumbnail of 350 CLINICAL FACTORS PREDICTING ADVANCED LIVER FIBROSIS IN HEPATITIS B E ANTIGEN POSITIVE CHRONIC HEPATITIS B

Journal of Hepatology, 2009

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Research paper thumbnail of Managing hyperglycaemia in patients with diabetes on enteral nutrition: the role of a specialized diabetes team

European Journal of Clinical Nutrition

Background/objectives:Hyperglycaemia is commonly observed in patients with diabetes mellitus (DM)... more Background/objectives:Hyperglycaemia is commonly observed in patients with diabetes mellitus (DM) while receiving enteral nutrition (EN) in hospital, and hyperglycaemia has been shown to be associated with poor clinical outcomes. The aim of this study was to assess the glycaemic status of patients with DM who received EN during hospital admission and evaluate the impact of intervention by a specialist diabetes team (SDT) on glycaemic control and clinical outcomes of these patients.Subjects/methods:A retrospective review of patients with DM who required EN during hospital admission was conducted. We compared patient characteristics, glycaemic profile and clinical outcomes between patients who were managed by SDT and those who were managed by the admitting team.Results:Seventy-four patients with DM on EN were included in this study, of whom 27 were managed by SDT while on EN. Compared with patients managed by the admitting team, those who were reviewed by SDT had better glycaemic cont...

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Research paper thumbnail of Gestational Diabetes Mellitus: a review of the diagnosis, clinical implications and management

Gestational diabetes mellitus (GDM) is a condition that affects the wellbeing of mother and fetus... more Gestational diabetes mellitus (GDM) is a condition that affects the wellbeing of mother and fetus. Women with GDM are at risk of type 2 diabetes mellitus in the future, while fetal exposure to hyperglycaemia in-utero may affect their glycometabolic profile later in life. Appropriate screening and management of this problem is important in ensuring good pregnancy outcomes. In this review, the clinical implications, the various ways to screen and diagnose GDM, and management strategies during pregnancy will be discussed. For years, insulin is the mainstay of treatment if medical nutrition therapy fails to maintain adequate glycaemic control, but use of other oral pharmacotherapy may gain greater acceptance in the future. Following delivery, ongoing follow-up of these women is worthwhile as early intervention through lifestyle or pharmacotherapy may prevent the development of diabetes

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Research paper thumbnail of Is Obeticholic Acid the Solution to Nonalcoholic Steatohepatitis?

Gastroenterology, Jan 26, 2015

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Research paper thumbnail of Albumin-to-Alkaline Phosphatase Ratio: A Novel Prognostic Index for Hepatocellular Carcinoma

Disease markers, 2015

Prognosis of patients with hepatocellular carcinoma (HCC) depends on both tumour extent and hepat... more Prognosis of patients with hepatocellular carcinoma (HCC) depends on both tumour extent and hepatic function reserve. Liver function test (LFT) is a basic routine blood test to evaluate hepatic function. We first analysed LFT components and their associated scores in a training cohort of 217 patients who underwent curative surgery to identify LFT parameters with high performance (discriminatory capacity, homogeneity, and monotonicity of gradient). We derived a novel index, albumin-to-alkaline phosphatase ratio (AAPR), which had the highest c-index (0.646) and χ (2) (24.774) among other liver biochemical parameters. The AAPR was an independent prognostic factor for overall and disease-free survival. The adjusted hazard ratio of death and tumour relapse was 2.36 (P = 0.002) and 1.85 (P = 0.010), respectively. The independent prognostic significance of AAPR on top of 5 commonly used and well established staging systems was further confirmed in 2 independent cohorts of patients receivin...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A new QoS provisioning method for adaptive multimedia in cellular wireless networks

IEEE INFOCOM 2004, 2004

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Performance enhancements of combining QoS provisioning and location management in wireless cellular networks

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE, 2002

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A framework of secure location service for position-based ad hoc routing

Proceedings of the 1st ACM international workshop on Performance evaluation of wireless ad hoc, sensor, and ubiquitous networks - PE-WASUN '04, 2004

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Joint Optimal Channel Assignment and Congestion Control for Multi-channel Wireless Mesh Networks

2006 IEEE International Conference on Communications, 2006

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A Constrained MDP-Based Vertical Handoff Decision Algorithm for 4G Wireless Networks

2008 IEEE International Conference on Communications, 2008

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Higher Estimated Net Endogenous Acid Production May Be Associated with Increased Prevalence of Nonalcoholic Fatty Liver Disease in Chinese Adults in Hong Kong

PLOS ONE, 2015

Nonalcoholic fatty liver disease (NAFLD) has been associated with reduced growth hormone levels a... more Nonalcoholic fatty liver disease (NAFLD) has been associated with reduced growth hormone levels and signaling. Such hormonal changes also occur in metabolic acidosis. Since mild metabolic acidosis can be diet induced, diet-induced acid load may constitute a nutritional factor with possible influence on NAFLD development. This study explored whether a higher diet-induced acid load is associated with an increased likelihood of NAFLD. Apparently healthy Chinese adults (330 male, 463 female) aged 19-72 years were recruited through population screening between 2008 and 2010 in a cross-sectional population-based study in Hong Kong. Estimated net endogenous acid production (NEAP) was calculated using Frassetto's method and potential renal acid load (PRAL) was calculated using Remer's method based on dietary data from a food frequency questionnaire. NAFLD was defined as intrahepatic triglyceride content at >5% by proton-magnetic resonance spectroscopy. Possible advanced fibrosis was defined as liver stiffness at >7.9 kPa by transient elastography. Multivariate logistic regression models were used to examine the association between each measure of dietary acid load and prevalent NAFLD or possible advanced fibrosis with adjustment…

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Screening diabetic patients for non-alcoholic fatty liver disease with controlled attenuation parameter and liver stiffness measurements: a prospective cohort study

Gut, Jan 14, 2015

Type 2 diabetes is an important risk factor for non-alcoholic fatty liver disease (NAFLD), but cu... more Type 2 diabetes is an important risk factor for non-alcoholic fatty liver disease (NAFLD), but current guidelines provide conflicting recommendations on whether diabetic patients should be screened for NAFLD. We therefore studied the strategy of screening diabetic patients by FibroScan. Liver fat and fibrosis were assessed by controlled attenuation parameter (CAP) and liver stiffness measurements (LSM) by FibroScan at a diabetic centre for patients from primary care and hospital clinics. Probe-specific LSM cut-offs were used to detect advanced fibrosis. Of 1918 patients examined, 1799 (93.8%) had valid CAP and 1884 (98.2%) had reliable LSM (1770 with the M probe and 114 with the XL probe). The proportion of patients with increased CAP and LSM was 72.8% (95% CI 70.7% to 74.8%) and 17.7% (95% CI 16.0% to 19.5%), respectively. By multivariable analysis, female gender, higher body mass index, triglycerides, fasting plasma glucose and alanine aminotransferase (ALT) and non-insulin use we...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Bounds for Lifetime Maximization with Multiple Sinks in Wireless Sensor Networks

2007 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, 2007

In wireless sensor networks, the reliability can be increased when data is sent to multiple sinks... more In wireless sensor networks, the reliability can be increased when data is sent to multiple sinks. Data information transmitted to each sink can be considered as a commodity. The objective is to determine the route between each source and sink such that the lifetime of the commodity is maximized. In this paper, we derive the upper and lower bounds for

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Link-by-link feedback mechanism for intra-session random linear network coding in wireless sensor networks

2012 IEEE International Conference on Communications (ICC), 2012

Bookmarks Related papers MentionsView impact

Research paper thumbnail of On decoding delay of intra-session random linear network coding for line networks

2012 IEEE International Symposium on Information Theory Proceedings, 2012

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Maximum-Lifetime Coding Subgraph for Multicast Traffic in Wireless Sensor Networks

IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference, 2008

It has been shown that network coding can lead to significant improvement in network capacity and... more It has been shown that network coding can lead to significant improvement in network capacity and reduction in power consumption for multicast traffic in wireless networks. In this paper, we study the problem of supporting multicast in wireless sensor networks. The objective is to jointly maximize the network lifetime and minimize the number of packets undergoing network coding. We formulate

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Secure Location Verification for Vehicular Ad-Hoc Networks

IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference, 2008

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A Novel Scheduling Algorithm for Video Traffic in High-Rate WPANs

IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference, 2007

The emerging high-rate wireless personal area net- work (WPAN) technology is capable of supportin... more The emerging high-rate wireless personal area net- work (WPAN) technology is capable of supporting high-speed and high-quality real-time multimedia applications. In particular, MPEG-4 video streams are deemed to be a widespread traffic type. However, in the current IEEE 802.15.3 standard for media access control (MAC) of high-rate WPANs, the implementation details of some key issues such as scheduling and quality

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Distributed Multi-Interface Multi-Channel Random Access

IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference, 2008

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Structural and optical properties of InAs bilayer quantum dots grown at constant growth rate and temperature

Journal of Crystal Growth, 2011

Bilayer quantum dots (BQDs) are interesting structures for long wavelength emission due to its ab... more Bilayer quantum dots (BQDs) are interesting structures for long wavelength emission due to its ability to tune the areal density and dot size separately. However, wide implementation of BQDs is hindered by the complicated growth procedures, which involve two sets of growth rate and temperature for the respective QD layers. We had recently reported the optical properties of the BQDs

Bookmarks Related papers MentionsView impact

Research paper thumbnail of 350 CLINICAL FACTORS PREDICTING ADVANCED LIVER FIBROSIS IN HEPATITIS B E ANTIGEN POSITIVE CHRONIC HEPATITIS B

Journal of Hepatology, 2009

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Managing hyperglycaemia in patients with diabetes on enteral nutrition: the role of a specialized diabetes team

European Journal of Clinical Nutrition

Background/objectives:Hyperglycaemia is commonly observed in patients with diabetes mellitus (DM)... more Background/objectives:Hyperglycaemia is commonly observed in patients with diabetes mellitus (DM) while receiving enteral nutrition (EN) in hospital, and hyperglycaemia has been shown to be associated with poor clinical outcomes. The aim of this study was to assess the glycaemic status of patients with DM who received EN during hospital admission and evaluate the impact of intervention by a specialist diabetes team (SDT) on glycaemic control and clinical outcomes of these patients.Subjects/methods:A retrospective review of patients with DM who required EN during hospital admission was conducted. We compared patient characteristics, glycaemic profile and clinical outcomes between patients who were managed by SDT and those who were managed by the admitting team.Results:Seventy-four patients with DM on EN were included in this study, of whom 27 were managed by SDT while on EN. Compared with patients managed by the admitting team, those who were reviewed by SDT had better glycaemic cont...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Gestational Diabetes Mellitus: a review of the diagnosis, clinical implications and management

Gestational diabetes mellitus (GDM) is a condition that affects the wellbeing of mother and fetus... more Gestational diabetes mellitus (GDM) is a condition that affects the wellbeing of mother and fetus. Women with GDM are at risk of type 2 diabetes mellitus in the future, while fetal exposure to hyperglycaemia in-utero may affect their glycometabolic profile later in life. Appropriate screening and management of this problem is important in ensuring good pregnancy outcomes. In this review, the clinical implications, the various ways to screen and diagnose GDM, and management strategies during pregnancy will be discussed. For years, insulin is the mainstay of treatment if medical nutrition therapy fails to maintain adequate glycaemic control, but use of other oral pharmacotherapy may gain greater acceptance in the future. Following delivery, ongoing follow-up of these women is worthwhile as early intervention through lifestyle or pharmacotherapy may prevent the development of diabetes

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Is Obeticholic Acid the Solution to Nonalcoholic Steatohepatitis?

Gastroenterology, Jan 26, 2015

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Albumin-to-Alkaline Phosphatase Ratio: A Novel Prognostic Index for Hepatocellular Carcinoma

Disease markers, 2015

Prognosis of patients with hepatocellular carcinoma (HCC) depends on both tumour extent and hepat... more Prognosis of patients with hepatocellular carcinoma (HCC) depends on both tumour extent and hepatic function reserve. Liver function test (LFT) is a basic routine blood test to evaluate hepatic function. We first analysed LFT components and their associated scores in a training cohort of 217 patients who underwent curative surgery to identify LFT parameters with high performance (discriminatory capacity, homogeneity, and monotonicity of gradient). We derived a novel index, albumin-to-alkaline phosphatase ratio (AAPR), which had the highest c-index (0.646) and χ (2) (24.774) among other liver biochemical parameters. The AAPR was an independent prognostic factor for overall and disease-free survival. The adjusted hazard ratio of death and tumour relapse was 2.36 (P = 0.002) and 1.85 (P = 0.010), respectively. The independent prognostic significance of AAPR on top of 5 commonly used and well established staging systems was further confirmed in 2 independent cohorts of patients receivin...

Bookmarks Related papers MentionsView impact