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» The Polymatroid Steiner Problems
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91
Voted
UM
2009
Springer
15 years 4 months ago
What Do Academic Users Really Want from an Adaptive Learning System?
When developing an Adaptive Learning System (ALS), users are generally consulted (if at all) towards the end of the development cycle. This can limit users’ feedback to the chara...
Martin Harrigan, Milos Kravcik, Christina Steiner,...
87
Voted
WAOA
2004
Springer
111views Algorithms» more  WAOA 2004»
15 years 2 months ago
More Powerful and Simpler Cost-Sharing Methods
We provide a new technique to derive group strategyproof mechanisms for the cost-sharing problem. Our technique is simpler and provably more powerful than the existing one based on...
Paolo Penna, Carmine Ventre
96
Voted
CCS
1998
ACM
15 years 1 months ago
Authenticated Group Key Agreement and Friends
Many modern computing environments involve dynamic peer groups. Distributed simulation, multi-user games, conferencing and replicated servers are just a few examples. Given the op...
Giuseppe Ateniese, Michael Steiner, Gene Tsudik
86
Voted
APPROX
2008
Springer
134views Algorithms» more  APPROX 2008»
14 years 11 months ago
Inapproximability of Survivable Networks
In the Survivable Network Design Problem (SNDP) one seeks to find a minimum cost subgraph that satisfies prescribed node-connectivity requirements. We give a novel approximation r...
Yuval Lando, Zeev Nutov
73
Voted
CORR
2008
Springer
133views Education» more  CORR 2008»
14 years 9 months ago
Approximation Algorithms for Shortest Descending Paths in Terrains
A path from s to t on a polyhedral terrain is descending if the height of a point p never increases while we move p along the path from s to t. No efficient algorithm is known to ...
Mustaq Ahmed, Sandip Das, Sachin Lodha, Anna Lubiw...