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FOCS
2008
IEEE
14 years 2 months ago
Beating the Random Ordering is Hard: Inapproximability of Maximum Acyclic Subgraph
We prove that approximating the Max Acyclic Subgraph problem within a factor better than 1/2 is Unique-Games hard. Specifically, for every constant ε > 0 the following holds:...
Venkatesan Guruswami, Rajsekar Manokaran, Prasad R...
BMCBI
2007
200views more  BMCBI 2007»
13 years 7 months ago
BNDB - The Biochemical Network Database
Background: Technological advances in high-throughput techniques and efficient data acquisition methods have resulted in a massive amount of life science data. The data is stored ...
Jan Küntzer, Christina Backes, Torsten Blum, ...
GLOBECOM
2008
IEEE
14 years 2 months ago
Multi-Cluster Multi-Parent Wake-Up Scheduling in Delay-Sensitive Wireless Sensor Networks
—Immediate notification of urgent but rare events and delivery of time sensitive actuation commands appear in many practical wireless sensor and actuator network applications. M...
Huang Lee, Abtin Keshavarzian, Hamid K. Aghajan
SWAT
2010
Springer
250views Algorithms» more  SWAT 2010»
14 years 19 days ago
Fixed-Parameter Algorithms for Cochromatic Number and Disjoint Rectangle Stabbing
Given a permutation π of {1, . . . , n} and a positive integer k, we give an algorithm with running time 2O(k2 log k) nO(1) that decides whether π can be partitioned into at mos...
Pinar Heggernes, Dieter Kratsch, Daniel Lokshtanov...
SIGMOD
2011
ACM
218views Database» more  SIGMOD 2011»
12 years 10 months ago
A data-oriented transaction execution engine and supporting tools
Conventional OLTP systems assign each transaction to a worker thread and that thread accesses data, depending on what the transaction dictates. This thread-to-transaction work ass...
Ippokratis Pandis, Pinar Tözün, Miguel B...