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Although level of awareness of the benefits of helmets was high, observed helmet usage was low. These results suggest that there is a need to implement new interventions to increase helmet use.

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ABSTRACT:Heritage documentation and representation is now a growing concern in the contemporary world, with unprecedentedly rapid technological development that pushes the frontier further every day. This ever growing means benefits both professionals and the general public, and the two can now be connected by this virtual bridge that channels heritage information from one end of the spectrum to the other, thus facilitating a dialogue never considered before. 4D virtual heritage with visualized tempo-spatial information can be easily shared across the continents and the story of heritage is told by a simple move of the thumb. Mobile LBS (Location-Based Service) enhances visitors' on-site experience and is readily available on the popular iOS platform. UGC (User Generated Content) on the internet provides interaction among users and managers, and brings the heritage site and the public into a live conversation. Although the above technological exploration is promising in itself, the question still remains as how it may be best implemented. The Re-yuangmingyuan program for the reconstruction and representation of an imperial garden in Beijing has made several attempts that deserve discussion, and contributes to heritage documentation and conservation in general.

Stream processor has been widely used in multimedia processing because of the high performance gained by parallelism. In order to achieve higher parallelism, the stream processor employs large width structure of VLIW (very long instruction word, VLIW) and multiple parallelizable instructions are organized into one VLIW. Because the width of VLIW is fixed, there are a large number of empty operations (non-operation, NOP) filled in VLIW, which results in serious code size expansion problem. Aiming at this issue, the horizontal code compression and vertical code compression methods are applied on the VLIW of stream processor respectively. First the VLIW is divided into several subfields according to the logic characteristics of VLIW instruction, then the horizontal code compression scheme which based on Huffman coding is applied on each subfield and this method can achieve approximately 78% code size reduction on average. However, the extra-long time required to decode the compressed VLIW before instruction execution may cause system performance penalty. In order to reduce the decompression time consumption, the vertical compression scheme is proposed. The vertical compression can reduce the code size nearly 70% by deleting the NOPs of VLIW in vertical direction. Furthermore the VLIW after vertical compression can be executed directly without decompression operation by using banked instruction memory. Specifically, the vertical compression can compress stream processor VLIW code size significantly and without any negative influence on performance.