Annie W. Y. Ng

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PROBLEM This paper addresses the effects of driver factors and sign design features on the comprehensibility of traffic signs. METHODS A survey was designed to capture subjects' personal particulars, ratings on sign features, and comprehension scores, and then administered to 109 Hong Kong full driving license holders. RESULTS Years with driving license(More)
This study investigated whether or not training methods affected the effectiveness of symbol training and if there were any relationships between sign symbol characteristics and training effectiveness. Altogether, 26 Mainland China industrial safety signs were used and 60 participants were randomly assigned into four equal-sized groups of control,(More)
This study investigated the effects of foot-side, sex, and index of difficulty (ID) on lateral and visually controlled foot-movement time with a reciprocal foot-tapping task on touch pad device in sitting posture. Perceived difficulty level of subjects in different tapping conditions was also examined. Nineteen male and nineteen female right-foot dominant(More)
This experiment investigated the relationships between the characteristics of prospective-users of traffic signs (people who will use the signs in the future) and the guessability of traffic signs, and also examined the effects of sign design features on the guessability of traffic signs. Forty-one Hong Kong Chinese subjects guessed the meanings and rated(More)
Proton T1 NMR relaxation of the cell wall materials from Chinese water chestnuts (CWC) is an order of magnitude more efficient than those from potatoes, even though both the major relaxation pathways and the relative proton population of the relaxation groups are similar. This anomalous behavior of CWC can be explained by the detection of a strong ESR(More)
The success of effective communication of traffic sign messages to road users may not only relate to the user characteristics but also the signs themselves. The purpose of this experiment was to examine the cognitive design features of 120 Mainland China traffic signs. The features included familiarity, concreteness, simplicity, meaningfulness, and semantic(More)
The purpose of this paper was to investigate finger response time to visual, auditory and tactile modality stimuli in the context of man-machine-interface. A total 94 right-handed Chinese participants (11 to 60 years old) took part in the visual, auditory, and tactile stimuli tests. In the visual and auditory stimuli tests, once the visual or auditory mode(More)
This study investigated the influence of user factors and symbol referents on public symbol design among older people, using the stereotype production method for collecting user ideas during the symbol design process. Thirty-one older adults were asked to draw images based on 28 public symbol referents and to indicate their familiarity with and ease with(More)
Two solution-processable metallopolyynes of platinum functionalized with the electron-deficient 4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one spacer and their model molecular complexes were synthesized and developed for the applications of polymer solar cells. These metallated polymers possess extremely low bandgaps of 1.44-1.53 eV which extend toward the(More)
We have investigated the effect of ZnO nanoparticle properties on the dye-sensitized solar cell performance. Nanoparticles with different sizes and optical properties were considered. We found that there is a complex relationship between native defects, dye adsorption, charge transport and solar cell performance. The presence of a high concentration of(More)