A QoE based performance study of mobile peer-to-peer live video streaming

Peer-to-peer (P2P) Mobile Ad Hoc Networks (MANETs) are widely envisioned to be a practical platform to mobile live video streaming applications (e.g., mobile IPTV). However, the performance of such a streaming solution is still largely unknown. As such, in this paper, we aim to quantify the streaming performance using a Quality of Experience (QoE) based approach. Our simulation results indicate that video streaming performance is highly sensitive to the video chunk size. Specifically, if the chunk size is small, performance, in terms of both QoE and QoS, is guaranteed but at the expense of a higher overhead. On the other hand, if chunk size is increased, performance can degrade quite rapidly. Thus, it needs some careful fine tuning of chunk size to obtain satisfactory QoE performance. © 2012 IEEE.published_or_final_versio

On sign changes of cusp forms and the halting of an algorithm to construct a supersingular elliptic curve with a given endomorphism ring

postprin

Japanese direct investment in China

This paper uses survey data to study the characteristics of Japanese direct investment in China as compared to those in the newly industrializing economies (NIEs) and in the member countries of ASEAN. Japanese firms invest in China for cost reasons as well as to expand their market shares. This paper also examines the determinants of Japanese direct investment in China using a regional data set from 1990 to 2000. To form a basis of comparison we run similar regressions for the largest foreign direct investor in China: Hong Kong. Local demands affect significantly the inflow of investment from both sources. Wage costs exert a larger influence on Hong Kong investment than on Japanese investment, which can be explained by the difference in the characteristics of investment projects from Hong Kong and those from Japan. Japanese firms appear to be attracted to Economic and Technology Development Zones, whereas Hong Kong firms are more attracted to Special Economic Zones and Open Coastal Cities. The quality of infrastructure matters more for firms from Hong Kong than from Japan. Distance does not affect Japanese direct investment significantly. This may reflect Japan's extensive experience in managing its operations in the global marketplace. © 2003 Elsevier Inc. All rights reserved.preprin

Low-complexity high-performance multiscale error diffusion technique for digital halftoning

Version of RecordPublishe

A low-complexity multiscale error diffusion algorithm for digital halftoning

Centre for Multimedia Signal Processing, Department of Electronic and Information EngineeringRefereed conference paper2005-2006 > Academic research: refereed > Refereed conference paperVersion of RecordPublishe

Association of estimated glomerular filtration rate and urine albumin-to-creatinine ratio with incidence of cardiovascular diseases and mortality in chinese patients with type 2 diabetes mellitus – a population-based retrospective cohort study

published_or_final_versio

Statin use reduces cardiovascular events and all-cause mortality amongst Chinese patients with type 2 diabetes mellitus: a 5-year cohort study

published_or_final_versio

Up-regulation of multidrug efflux pumps during the bacterial stress response to host physiological conditions

Poster abstracts no. 77BDrug efflux represents an important mechanism for antibiotic and multidrug resistance in bacteria. Different from other resistance determinants which genes usually are acquired by adaptive mutations or horizontal transfer, efflux genes often are chromosomally encoded and they constitute from 6% to 18% of all transporters in bacterial genomes. Since over...published_or_final_versio

Electronic clinical practice guidelines: Current status and future prospects in Hong Kong

published_or_final_versio

M30 Antagonizes Indoleamine 2,3-Dioxygenase Activation and Neurodegeneration Induced by Corticosterone in the Hippocampus

Monoamine oxidases (MAO), downstream targets of glucocorticoid, maintain the turnover and homeostasis of monoamine neurotransmitters; yet, its pathophysiological role in monoamine deficiency, oxidative stress and neuroinflammation remains controversial. Protective effects of M30, a brain selective MAO inhibitor with iron-chelating antioxidant properties, have been shown in models of neurodegenerative diseases. This study aims to examine the neuroprotective mechanism of M30 against depressive-like behavior induced by corticosterone (CORT). Sprague-Dawley rats were given CORT subcutaneous injections with or without concomitant M30 administration for two weeks. CORT-treated rats exhibited depressive-like behavior with significant elevated levels of MAO activities, serotonin turnover, oxidative stress, neuroinflammation and apoptosis in the hippocampus with significant losses of synaptic proteins when compared to the control. The expression and activity of cytokine-responsive indoleamine 2,3-dioxygenase (IDO-1), a catabolic enzyme of serotonin and tryptophan, was significantly increased in the CORT-treated group with lowered levels of serotonin. Besides, CORT markedly reduced dendritic length and spine density. Remarkably, M30 administration neutralized the aberrant changes in the hippocampus and prevented the induction of depressive-like behavior induced by CORT. Our results suggest that M30 is neuroprotective against CORT-induced depression targeting elevated MAO activities that cause oxidative stress and neuroinflammation, resulting in IDO-1 activation, serotonin deficiency and neurodegeneration.published_or_final_versio