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» Approximating Transitivity in Directed Networks
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STOC
2004
ACM
131views Algorithms» more  STOC 2004»
14 years 7 months ago
(Almost) tight bounds and existence theorems for confluent flows
A flow is said to be confluent if at any node all the flow leaves along a single edge. Given a directed graph G with k sinks and non-negative demands on all the nodes of G, we con...
Jiangzhuo Chen, Robert D. Kleinberg, Lászl&...
CIAC
2010
Springer
246views Algorithms» more  CIAC 2010»
13 years 10 months ago
Capacitated Confluent Flows: Complexity and Algorithms
A flow on a directed network is said to be confluent if the flow uses at most one outgoing arc at each node. Confluent flows arise naturally from destination-based routing. We stud...
Daniel Dressler and Martin Strehler
GECCO
2008
Springer
130views Optimization» more  GECCO 2008»
13 years 8 months ago
VoIP speech quality estimation in a mixed context with genetic programming
Voice over IP (VoIP) speech quality estimation is crucial to providing optimal Quality of Service (QoS). This paper seeks to provide improved speech quality estimation models with...
Adil Raja, R. Muhammad Atif Azad, Colin Flanagan, ...
WWW
2003
ACM
14 years 8 months ago
On the bursty evolution of blogspace
We propose two new tools to address the evolution of hyperlinked corpora. First, we define time graphs to extend the traditional notion of an evolving directed graph, capturing li...
Ravi Kumar, Jasmine Novak, Prabhakar Raghavan, And...
UIST
2005
ACM
14 years 29 days ago
Informal prototyping of continuous graphical interactions by demonstration
Informal prototyping tools have shown great potential in facilitating the early stage design of user interfaces. However, continuous interactions, an important constituent of high...
Yang Li, James A. Landay