Sciweavers

493 search results - page 48 / 99
» Quantum Query Complexity of Some Graph Problems
Sort
View
ECCC
2007
123views more  ECCC 2007»
14 years 9 months ago
Lossy Trapdoor Functions and Their Applications
We propose a general cryptographic primitive called lossy trapdoor functions (lossy TDFs), and use it to develop new approaches for constructing several important cryptographic to...
Chris Peikert, Brent Waters
ADC
1995
Springer
90views Database» more  ADC 1995»
15 years 1 months ago
Computer Supported Query Formulation in an Evolving Context
Even if high-level query languages are used, query formulation may cause problems. This is notably so in case of large and complex application domains. Typical examples of these k...
Arthur H. M. ter Hofstede, Henderik Alex Proper, T...
ICDT
2009
ACM
105views Database» more  ICDT 2009»
15 years 10 months ago
Efficient data structures for range-aggregate queries on trees
Graph-theoretic aggregation problems have been considered both in OLAP (grid graph) and XML (tree). This paper gives new results for MIN aggregation in a tree, where we want the M...
Hao Yuan, Mikhail J. Atallah
ICALP
2003
Springer
15 years 2 months ago
Fixed-Parameter Algorithms for the (k, r)-Center in Planar Graphs and Map Graphs
The (k, r)-center problem asks whether an input graph G has ≤ k vertices (called centers) such that every vertex of G is within distance ≤ r from some center. In this paper we ...
Erik D. Demaine, Fedor V. Fomin, Mohammad Taghi Ha...
EKNOW
2009
14 years 7 months ago
Visual Middle-Out Modeling of Problem Spaces
Modeling is a complex and central activity in many domains. Domain experts and designers usually work by drawing and create models from the middle-out; however, visual and middle-...
Andrea Valente