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Abstract Hom and Wu introduced a knot concordance invariant called ν + , which dominates many concordance invariants derived from Heegaard Floer homology. In this paper, we give a full-twist… (More)
This paper explores the issues surrounding the use of an interactive blackboard as a teaching tool. A conceptual computerized learning environment termed "i-room" is proposed as a future technology… (More)
Abstract In this work, the charge transfer and recombination mechanism is uncovered for the PbS/ZnS quantum dot sensitized solar cells (QDSSCs) based on nanoporous TiO2 electrodes. PbS quantum dots… (More)
With the rapid increases in traffic on optical telecommunications systems, there is an active program for developing transmission devices for use in wavelength divi- sion multiplexing (WDM), which is… (More)
Today, many electronic Bulletin Board Systems (BBS) are established on the Internet and have been used in many researches of Computer Supported Collaborative Learning (CSCL). And then, in this study,… (More)
Abstract Tin molybdenum sulfides Sn x Mo 6 S 8−y , known as Chevrel phase compound, were prepared by vacuum seal technique at 1000°C and the single phase region was determined. The nonstoichiometric… (More)