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141
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VTC
2006
IEEE
15 years 10 months ago
2006
IEEE
Motivated by the increasing popularity of OFDMA, this paper studies the sum-rate optimality of OFDMA as an uplink multicarrier multiple-access scheme. We address the relationship ...
127
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CASES
2006
ACM
15 years 10 months ago
2006
ACM
Memory size reduction and memory accesses optimization are crucial issues for embedded systems. In the context of affine programs, these two challenges are classically tackled by ...
139
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NORDICHI
2006
ACM
15 years 10 months ago
2006
ACM
In this paper we discuss why access to mathematical graphs is problematic for visually impaired people. By a review of graph understanding theory and interviews with visually impa...
119
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SIGIR
2006
ACM
15 years 10 months ago
2006
ACM
Despite its intuitive appeal, the hypothesis that retrieval at the level of “concepts” should outperform purely term-based approaches remains unverified empirically. In addit...
149
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ACSAC
2005
IEEE
15 years 10 months ago
2005
IEEE
The most common computer authentication method is to use alphanumerical usernames and passwords. This method has been shown to have significant drawbacks. For example, users tend ...