13,213 research outputs found
An architecture of a user-centred digital library for the academic community
An architecture of a user-centred digital library, designed to lead users of an academic community to the required information resources based on their tasks, is proposed. Information resources include full-text articles, databases, theses and dissertations, e-journals, e-books, multimedia databases, and so on. Other information resources such as university course calendars, university statutes, course registration, thesis and dissertation guidelines, style guides, and so on, are also needed by users. A prototype has been designed and developed using the School of Computer Engineering at Nanyang Technological University (NTU) as an example of such an environment to provide access to these information resources which are spread across different servers and in different home pages This prototype provides links to various information resources according to users' needs, as well as a personal work space to record/store his/her publications, frequently used or favorite hyperlinks and references or notes. Various stages of the prototype design and development are described and future works on this line are highlighted
Metastable States in Two-Lane Traffic Flow Models With Slow-To-Start Rule
Using computer simulations, we show that metastable states still occur in
two-lane traffic models with slow to start rules. However, these metastable
states no longer exist in systems where aggressive drivers (\textit{which do
not look back before changing lanes}) are present. Indeed, the presence of only
one aggressive driver in the circuit, triggers the breakdown of the high flow
states. In these systems, the steady state is unique and its relaxation
dynamics should depend on the lane changing probability and the number
of aggressive drivers present in the circuit. It is found also that the
relaxation time diverges as the form of a power-law : .Comment: 7 pages, 6 figure
Know2Look: Commonsense Knowledge for Visual Search
With the rise in popularity of social media, images accompanied by contextual text form a huge section of the web. However, search and retrieval of documents are still largely dependent on solely textual cues. Although visual cues have started to gain focus, the imperfection in object/scene detection do not lead to significantly improved results. We hypothesize that the use of background commonsense knowledge on query terms can significantly aid in retrieval of documents with associated images. To this end we deploy three different modalities - text, visual cues, and commonsense knowledge pertaining to the query - as a recipe for efficient search and retrieval
Ground state phase diagram and magnetoconductance of a one-dimensional Hubbard superlattice at half-filling
We have studied a one dimensional Hubbard superlattice with different Coulomb
correlations at alternating sites for a half-filled band. Mean field
calculations based on the Hartree-Fock approximation together with a real space
renormalization group technique were used to study the ground state of the
system. The phase diagrams obtained in these approaches agree with each other
from the weak to the intermediate coupling regime. The mean field results show
very quick convergence with system size. The renormalization group results
indicate a spatial modulation of local moments that was identified in some
previous work. Also we have studied the magnetoconductance of such
superlattices which reveals several interesting points.Comment: 10 pages, 13 figures. to be published in Phys. Rev. B, vol. 75, Issue
23 (tentative
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