O. Frieder

Publications468
h-index50
Citations12,331
Highly Influential Citations683
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Distributed construction of connected dominating set in wireless ad hoc networks
TLDR
This work presents their own distributed algorithm that outperforms the existing algorithms for minimum CDS and establishes the /spl Omega/(n log n) lower bound on the message complexity of any distributed algorithm for nontrivial CDS, which is thus message-optimal.
New distributed algorithm for connected dominating set in wireless ad hoc networks
TLDR
This work presents their own distributed algorithm that outperforms the existing algorithms for minimum CDS and establishes the /spl Omega/(n log n) lower bound on the message complexity of any distributed algorithm for nontrivial CDs, which is thus message-optimal.
Message-optimal connected dominating sets in mobile ad hoc networks
TLDR
This paper proposes the first distributed approximation algorithm to construct a MCDS for the unit-disk-graph with a emph constant approximation ratio, and emph linear time and emphlinear message complexity.
Collection statistics for fast duplicate document detection
TLDR
A new algorithm for duplicate document detection that uses collection statistics and shows that the approach, called I-Match, scales in terms of the number of documents and works well for documents of all sizes.
Efficient interference-aware TDMA link scheduling for static wireless networks
TLDR
Using a mathematical formulation, synchronized TDMA link schedulings that optimize the networking throughput are developed that are both efficient centralized and distributed algorithms that use time slots within a constant factor of the optimum.
Information retrieval - algorithms and heuristics
  • D. Grossman, O. Frieder
  • Computer Science
    The Kluwer international series in engineering…
  • 30 September 1998
TLDR
This paper presents a meta-modelling architecture that automates the very labor-intensive and therefore time-heavy and expensive process of integrating structured data and text into a discrete-time system.
Minimum-energy broadcast routing in static ad hoc wireless networks
TLDR
By exploring geometric structures of Euclidean MSTs, it is proved that the approximation ratio of MST is between 6 and 12, and the approximation ratios of BIP is between /sup 13///sub 3/ and 12; these are the first analytical results for minimum-energy broadcasting.
Distributed heuristics for connected dominating sets in wireless ad hoc networks
TLDR
Two destributed heuristics with constant performance ratios are proposed, which require only single-hop neighborhood knowledge, and a message length of O (1) and O(n log n), respectively.
On arabic search: improving the retrieval effectiveness via a light stemming approach
TLDR
This work proposes a novel light-stemming algorithm for Arabic texts that significantly outperforms the root-based algorithm and shows that a significant improvement in retrieval precision can be achieved with light inflectional analysis of Arabic words.
Hourly analysis of a very large topically categorized web query log
TLDR
It is shown that query traffic from particular topical categories differs both from the query stream as a whole and from other categories, which is relevant to the development of enhanced query disambiguation, routing, and caching algorithms.
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