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QUESTA
2010
107views more  QUESTA 2010»
14 years 8 months ago
On the inapproximability of M/G/K: why two moments of job size distribution are not enough
The M/G/K queueing system is one of the oldest model for multi-server systems, and has been the topic of performance papers for almost half a century. However, even now, only coar...
Varun Gupta, Mor Harchol-Balter, J. G. Dai, Bert Z...
QUESTA
2007
50views more  QUESTA 2007»
14 years 9 months ago
Stability of join-the-shortest-queue networks
This paper investigates stability behavior in a variant of a generalized Jackson queueing network. In our network, some customers use a join-the-shortest-queue policy when enterin...
J. G. Dai, John J. Hasenbein, Bara Kim
PUC
2010
114views more  PUC 2010»
14 years 8 months ago
Mobile phone-based pervasive fall detection
Falls are a major health risk that diminishes the quality of life among the elderly people. The importance of fall detection increases as the elderly population surges, especially ...
Jiangpeng Dai, Xiaole Bai, Zhimin Yang, Zhaohui Sh...
IJNSEC
2007
107views more  IJNSEC 2007»
14 years 9 months ago
Original Signer's Forgery Attacks on Discrete Logarithm Based Proxy Signature Schemes
A proxy signature scheme enables a proxy signer to sign messages on behalf of the original signer. In this paper, we demonstrate that a number of discrete logarithm based proxy si...
Tianjie Cao, Xianping Mao
ICWMC
2006
IEEE
15 years 3 months ago
An Overview of MAC Protocols with Directional Antennas in Wireless ad hoc Networks
Although directional antennas have been used in mobile communications systems for quite a long time, realistic applications of directional or smart antennas in wireless ad hoc net...
Hongning Dai, Kam-Wing Ng, Min-You Wu