Brane cosmologies with static, five-dimensional and Z2 symmetric bulks are analysed. A general solution generating mechanism is outlined. The qualatitive cosmological behaviour of all such solutions is determined. Conditions for avoiding naked bulk singularities are also discussed. The restrictions placed on the solutions by the assumption of such a static bulk are investigated. In particular t...

This paper presents an exploration of the design of a memory model to support the management of persistent historical memories recorded by a smart work object. Analysis of a range of potential application categories and scenarios involving a smart work object is used to highlight the requirements and different characteristics of digital memories. The analysis is then used to identify a range of...

We propose a transforming method of MPEG-4 contents in order to present the contents on PDA devices in this paper. The method reconstructs the mp4 file according to transforming a scene tree in MPEG-4 contents when the contents are authored. The method reduces the size of each object in a scene of the content for presenting it efficiently on the small interface of a PDA device, and transforms v...

I Zwicky 1 (I Zw 1) is the prototype narrow line quasar. Its narrow line profiles minimize blending effects and thus allow a significantly more accurate study of individual quasar emission lines. We report here the results of our study of the 1150-3250 Å emission of I Zw 1 using a high S/N (50-120) spectrum obtained with the Faint Object Spectrograph (FOS) of the Hubble Space Telescope (HST). T...