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ER
1994
Springer
121views Database» more  ER 1994»
15 years 10 months ago
An Executable Meta Model for Re-Engineering of Database Schemas
A logical database schema, e.g. a relational one, is an implementation of a speci cation, e.g. an entity-relationship diagram. Upcoming new data models and the necessity of seamle...
Manfred A. Jeusfeld, Uwe A. Johnen
ICTL
1994
15 years 10 months ago
Abduction in Temporal Reasoning
Commonsense knowledge often omits the temporal incidence of facts, and even the ordering between occurrences is only available for some of their instances. Reasoning about the temp...
Cristina Ribeiro, António Porto
REX
1991
15 years 10 months ago
From Timed to Hybrid Systems
We propose a framework for the formal speci cation and veri cation of timed and hybrid systems. For timed systems we propose a speci cation language that refers to time only throug...
Oded Maler, Zohar Manna, Amir Pnueli
CAV
2008
Springer
158views Hardware» more  CAV 2008»
15 years 8 months ago
Linear Arithmetic with Stars
We consider an extension of integer linear arithmetic with a "star" operator takes closure under vector addition of the solution set of a linear arithmetic subformula. We...
Ruzica Piskac, Viktor Kuncak
ICWS
2008
IEEE
15 years 8 months ago
Dynamic Exception Handling Based on Web Services and OPC XML-DA
Programmable Logic Controllers (PLC) are widely used in process automation due to their fast and guarantee response time. However their programming and interfacing capacities are ...
Francisco Javier Díez, Iñaki Maurtua