198
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STOC
2012
ACM
13 years 7 months ago
2012
ACM
We consider the problem of computing the k-sparse approximation to the discrete Fourier transform of an ndimensional signal. We show: • An O(k log n)-time randomized algorithm f...
179
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STOC
2012
ACM
13 years 7 months ago
2012
ACM
Locally Decodable Code (LDC) is a code that encodes a message in a way that one can decode any particular symbol of the message by reading only a constant number of locations, eve...
137
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STOC
2012
ACM
13 years 7 months ago
2012
ACM
In this work we describe an explicit, simple, construction of large subsets of Fn , where F is a finite field, that have small intersection with every k-dimensional affine subsp...
171
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STOC
2012
ACM
13 years 7 months ago
2012
ACM
We give the first time-space tradeoff lower bounds for Resolution proofs that apply to superlinear space. In particular, we show that there are formulas of size N that have Reso...
133
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STOC
2012
ACM
13 years 7 months ago
2012
ACM
We analyze the Schelling model of segregation in which a society of n individuals live in a ring. Each individual is one of two races and is only satisfied with his location so l...
176
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SIGIR
2012
ACM
13 years 7 months ago
2012
ACM
During a three-day workshop in February 2012, 45 Information Retrieval researchers met to discuss long-range challenges and opportunities within the field. The result of the works...
187
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SIGIR
2012
ACM
13 years 7 months ago
2012
ACM
Many important search tasks require multiple search sessions to complete. Tasks such as travel planning, large purchases, or job searches can span hours, days, or even weeks. Inev...
187
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SIGIR
2012
ACM
13 years 7 months ago
2012
ACM
Hashtags are widely used in Twitter to define a shared context for events or topics. In this paper, we aim to predict hashtag popularity in near future (i.e., next day). Given a ...
187
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SIGIR
2012
ACM
13 years 7 months ago
2012
ACM
Assessors frequently disagree on the topical relevance of documents. How much of this disagreement is due to ambiguity in assessment instructions? We have two assessors assess TRE...