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FOCS
2006
IEEE
15 years 10 months ago
On the time complexity of 2-tag systems and small universal Turing machines
We show that 2-tag systems efficiently simulate Turing machines. As a corollary we find that the small universal Turing machines of Rogozhin, Minsky and others simulate Turing ma...
Damien Woods, Turlough Neary
FCT
2005
Springer
15 years 10 months ago
The Complexity of Querying External Memory and Streaming Data
We review a recently introduced computation model for streaming and external memory data. An important feature of this model is that it distinguishes between sequentially reading (...
Martin Grohe, Christoph Koch, Nicole Schweikardt
ECOOPW
1999
Springer
15 years 8 months ago
Systematic Change Impact Determination in Complex Object Database Schemata
Impact analysis is seen as an important technique for controlling the evolution of software systems. Numerous approaches have been proposed which aim to assess the impact of chang...
Simon Lock, Awais Rashid, Peter Sawyer, Gerald Kot...
MFCS
1993
Springer
15 years 8 months ago
The Complexity of Finding Replicas Using Equality Tests
We prove (for fixed k) that at least 1 k−1 (n 2 ) − O(n) equality tests and no more than 2 k (n 2 )+O(n) equality tests are needed in the worst case to determine whether a giv...
Gudmund Skovbjerg Frandsen, Peter Bro Miltersen, S...
GI
2007
Springer
15 years 8 months ago
The Use of Complex Stateflow-Charts with KIEL - An Automotive Case Study
Abstract: Modeling systems with Statecharts has become standard practice in the design of reactive embedded devices. However, the modeling of realistic applications with the paradi...
Steffen Prochnow, Reinhard von Hanxleden