36,747 research outputs found
Perceptions of e-commerce as an academic discipline in Australian universities
This paper presents findings from a study on perceptions of e-commerce as an academic discipline in Australian universities. The study examined Australian universities\u27 perceptions on whether e-commerce should be regarded as a business-oriented discipline or a technology-oriented discipline and further whether e-commerce should be considered as a distinctive discipline. Data was collected from official websites of all Australian universities and was categorized in accordance to award titles, host faculty and program structures. Findings showed that most Australian universities perceived e-commerce as a business-oriented discipline. However, there was no consensus on whether e-commerce should be considered as a distinctive discipline.<br /
The odd primary order of the commutator on low rank Lie groups
Let be a simply-connected, compact, simple Lie group of low rank relative
to a fixed prime . After localization at , there is a space which
"generates" in a certain sense. Assuming satisfies a homotopy
nilpotency condition relative to , we show that the Samelson product
of the identity of equals the order of the
Samelson product of the inclusion . Applying this result, we calculate the orders of
for all -regular Lie groups and give bounds on the orders of for certain quasi--regular Lie groups.Comment: 18 pages; Accepted by Topology and its Application
Information Theoretic Operating Regimes of Large Wireless Networks
In analyzing the point-to-point wireless channel, insights about two
qualitatively different operating regimes--bandwidth- and power-limited--have
proven indispensable in the design of good communication schemes. In this
paper, we propose a new scaling law formulation for wireless networks that
allows us to develop a theory that is analogous to the point-to-point case. We
identify fundamental operating regimes of wireless networks and derive
architectural guidelines for the design of optimal schemes.
Our analysis shows that in a given wireless network with arbitrary size,
area, power, bandwidth, etc., there are three parameters of importance: the
short-distance SNR, the long-distance SNR, and the power path loss exponent of
the environment. Depending on these parameters we identify four qualitatively
different regimes. One of these regimes is especially interesting since it is
fundamentally a consequence of the heterogeneous nature of links in a network
and does not occur in the point-to-point case; the network capacity is {\em
both} power and bandwidth limited. This regime has thus far remained hidden due
to the limitations of the existing formulation. Existing schemes, either
multihop transmission or hierarchical cooperation, fail to achieve capacity in
this regime; we propose a new hybrid scheme that achieves capacity.Comment: 12 pages, 5 figures, to appear in IEEE Transactions on Information
Theor
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