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» On the Hamkins approximation property
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PODS
2006
ACM
122views Database» more  PODS 2006»
16 years 6 months ago
Space- and time-efficient deterministic algorithms for biased quantiles over data streams
Skew is prevalent in data streams, and should be taken into account by algorithms that analyze the data. The problem of finding "biased quantiles"-- that is, approximate...
Graham Cormode, Flip Korn, S. Muthukrishnan, Dives...
ICDE
2010
IEEE
254views Database» more  ICDE 2010»
16 years 6 months ago
Efficient Rank Based KNN Query Processing Over Uncertain Data
Uncertain data are inherent in many applications such as environmental surveillance and quantitative economics research. As an important problem in many applications, KNN query has...
Ying Zhang, Xuemin Lin, Gaoping ZHU, Wenjie Zhang,...
MOBIHOC
2006
ACM
16 years 5 months ago
Starvation mitigation through multi-channel coordination in CSMA multi-hop wireless networks
Existing multi-channel protocols have been demonstrated to significantly increase aggregate throughput compared to single-channel protocols. However, we show that despite such imp...
Jingpu Shi, Theodoros Salonidis, Edward W. Knightl...
DCC
2008
IEEE
16 years 5 months ago
Improved versions of Tardos' fingerprinting scheme
We study the Tardos' probabilistic fingerprinting scheme and show that its codeword length may be shortened by a factor of approximately 4. We achieve this by retracing Tardo...
Oded Blayer, Tamir Tassa
SODA
2010
ACM
177views Algorithms» more  SODA 2010»
16 years 3 months ago
On the Exact Space Complexity of Sketching and Streaming Small Norms
We settle the 1-pass space complexity of (1 ? )approximating the Lp norm, for real p with 1 p 2, of a length-n vector updated in a length-m stream with updates to its coordinate...
Daniel M. Kane, Jelani Nelson, David P. Woodruff