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Chapter and Conference Paper
Effect of Adding Fillet to Protruded Rectangular Rib in a Microchannel Heat Sink Subject to Jet Im**ement Cooling
Microchannel heat sinks (MCHS) subjected to jet im**ing have been proven to be very efficient in dissipating heat energy. Many researchers have introduced surface augmentation on the heat sink for improving ...
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Chapter and Conference Paper
Aerodynamic Investigation on Geometrical Features of a Drone
Among the classifications of unmanned aerial vehicle (UAV), vertical take-off and landing (VTOL) has high operational flexibility and controllability. However, it has limited endurance due to high energy deman...
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Article
Where have all the hip fractures gone?
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Article
Attitude Stabilization with Real-time Experiments of a Tail-sitter Aircraft in Horizontal Flight
This paper focusses on the attitude stabilization of a mini tail-sitter aircraft, considering aerodynamic effects. The main characteristic of this vehicle is that it operates in either the hover mode for launc...
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Article
Inflation and late-time acceleration in braneworld cosmological models with varying brane tension
Braneworld models with variable brane tension λ introduce a new degree of freedom that allows for evolving gravitational and cosmological constants, the latter being a natural candidate for dark energy. We consid...
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Article
Conductivity, dielectric behaviour and thermal stability studies of lithium ion dissociation in poly(methyl methacrylate)-based gel polymer electrolytes
Thin films of poly(methyl methacrylate) (PMMA) with lithium triflate (LiCF3SO3) were prepared by using the solution-casting method with PMMA as the host polymer. Ionic conductivity and dielectric measurements wer...
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Article
Use of convalescent plasma therapy in SARS patients in Hong Kong
In order to evaluate the efficacy of convalescent plasma therapy in the treatment of patients with severe acute respiratory syndrome (SARS), 80 SARS patients were given convalescent plasma at Prince of Wales H...
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Chapter and Conference Paper
Multidisciplinary Aircraft Conceptual Design Optimisation Using a Hierarchical Asynchronous Parallel Evolutionary Algorithm (HAPEA)
In this paper we present some results of continuing research into improving robustness speed and application of Hierarchical Parallel Asynchronous Evolution Algorithms (HAPEA) to multidisciplinary design optim...
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Article
On the Computation of Observers in Discrete-Event Systems
The concept of observer was introduced in previous work by the authors on a hierarchical control theory of discrete-event systems (DES). It was shown that the observer property of the “causal reporter” map, wh...
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Chapter and Conference Paper
Challenges in Development of mini and micro Air Vehicles (mAVs and µAVs)
Critical technologies being developed to make micro Air Vehicle systems feasible include advanced aerodynamics, flight stability and control, lightweight propulsion and power generation, lightweight navigation...
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Chapter
Neural Network vs. Hedonic Price Model: Appraisal of High-Density Condominiums
In Hong Kong, high-density condominiums are routinely appraised by practitioners using the traditional comparative method. They collect a vast volume of transaction records, selecting suitable comparables from...
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Article
Formation of zinc phosphate coatings on AA6061 aluminum alloy
Conditions for forming zinc phosphate conversion coatings on AA6061 aluminum alloy have been investigated by characterizing coatings formed for different parameters of the coating bath. Morphological and compo...
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Article
Surface effects in chromate conversion coatings on 2024-T3 aluminum alloy
Chromate conversion coatings formed on samples of 2024-T3 aluminum alloy, which had been given different pre-treatments, were examined by transmission electron microscopy (TEM), X-ray photoelectron spectroscop...
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Chapter and Conference Paper
Do parents and children know each other’s smoking experience and attitudes towards children’s smoking?
In 1994, a survey on youth smoking and health in Hong Kong showed that 29% of junior secondary-school students (mostly aged 12–15 years) had ever smoked cigarettes. More than half had smoked their first cigare...
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Article
Supervisory Control of Distributed Systems: Conflict Resolution
In distributed synthesis and control, one well-known potential hazard is conflict between modular designs. In a modular approach to the supervisory control of discrete-event systems, modular supervisors that a...
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Article
On the low-frequency transport processes in a shallow coastal lagoon
The low-frequency transport processes in a small, shallow coastal lagoon (Indian River Bay, Delaware) are examined based on a set of data derived from tide gauges, near-bottom current meter measurements, and d...
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Article
Hierarchical control of discrete-event systems
An abstract hierarchical control theory is developed for discrete-event systems, based on the concepts of control structures and observers. Control structure is an abstract generalization of the family of cont...
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Article
Hierarchical control of timed discrete-event systems
An abstract hierarchical control theory is developed for a class of timed discrete-event systems (TDES) within the discrete-event control architectural framework proposed earlier by the authors. For this devel...
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Article
Fluorescence and scanning electron microscopic study on self-incompatibility in distylous Averrhoa carambola L.
Various combinations of intermorph, selfing and intramorph pollinations were carried out in Averrhoa carambola and the pollinated pistils were observed under fluorescence and scanning electron microscopes in time...
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Article
Protein profiles in pin and thrum floral organs of distylous Averrhoa carambola L.
Floral organs (tepal, stamen, style, including stigma, and ovary) from immature and mature (1 day prior to anthesis) flower buds of pin and thrum morphs of Averrhoa carambola were subjected to one and two-dimensi...
