Hong Kong Baptist University

About: Hong Kong Baptist University is a education organization based out in Hong Kong, China. It is known for research contribution in the topics: China & Population. The organization has 7811 authors who have published 18919 publications receiving 555274 citations. The organization is also known as: Hong Kong Baptist College & HKBU.

Fast fractal image encoding based on adaptive search

Abstract: This paper presents a new adaptive search approach to reduce the computational complexity of fractal encoding. A simple but very efficient adaptive necessary condition is introduced to exclude a large number of unqualified domain blocks so as to speed-up fractal image compression. Furthermore, we analyzed an unconventional affine parameter that has better properties than the conventional luminance offset. Specifically, we formulated an optimal bit allocation scheme for the simultaneous quantizations of the usual scaling and the aforementioned unconventional affine parameter. Experiments on standard images showed that our adaptive search method yields superior performance over conventional fractal encoding.

Selectivity control of CO versus HCOO− production in the visible-light-driven catalytic reduction of CO2 with two cooperative metal sites

Abstract: It is highly desirable to discover molecular catalysts with controlled selectivity for visible-light-driven CO2 reduction to fuels. In the design of catalysts employing earth-abundant metals, progress has been made for CO production, but formate generation has been observed more rarely. Here, we report a binuclear Co complex bearing a bi-quaterpyridine ligand that can selectively reduce CO2 to HCOO− or CO under visible light irradiation. Selective formate production (maximum of 97%) was obtained with a turnover number of up to 821 in basic acetonitrile solution. Conversely, in the presence of a weak acid, CO2 reduction affords CO with high selectivity (maximum of 99%) and a maximum turnover number of 829. The catalytic process is controlled by the two Co atoms acting synergistically, and the selectivity can be steered towards the desired product by simply changing the acid co-substrate. Performing photocatalytic CO2 reduction in a selective fashion with molecular catalysts represents a considerable challenge. Here, a binuclear cobalt complex featuring a bi-quaterpyridine ligand is developed that can selectively afford either carbon monoxide or formate by selection of the reaction medium acidity.

The interactive influence of country of origin of brand and product involvement on purchase intention

Abstract: Purpose – Globalization and outsourcing have decoupled country of origin into the country of origin of manufacture (COM) and the country of origin of the brand (COB). This study seeks to extend the work of Gurhan‐Canli and Maheswaran and Lee et al. by investigating the interactive influence of COB and personal involvement with a product on purchase intention.Design/methodology/approach – A total of 168 young adults in Hong Kong were intercepted for mall interviews and presented with mock advertisements for personal computers ostensibly with brands originating in Japan and Korea. Their personal involvement with such products was measured using an instrument designed by Zaichkowsky, and their purchase intentions were self‐assessed.Findings – COB was found to predict purchase intentions among consumers with a low level of personal involvement with computers, but not among consumers with a high level of personal involvement.Research limitations/implications – First, to improve internal validity, the study inv...