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VLDB
1987
ACM
108views Database» more  VLDB 1987»
13 years 11 months ago
Translating and Optimizing SQL Queries Having Aggregates
is at least ae powerful as SQL. Two well known relational query languages that have a sound theoretical foundation are relational algebra and relational calculus. As SQL is more cl...
Günter von Bültzingsloewen
ENTCS
2008
126views more  ENTCS 2008»
13 years 7 months ago
Comonadic Notions of Computation
We argue that symmetric (semi)monoidal comonads provide a means to structure context-dependent notions of computation such as notions of dataflow computation (computation on strea...
Tarmo Uustalu, Varmo Vene
HICSS
2010
IEEE
172views Biometrics» more  HICSS 2010»
14 years 2 months ago
Privacy Calculus on Social Networking Sites: Explorative Evidence from Germany and USA
Worldwide social networks, like Facebook, face fierce competition from local platforms when expanding globally. To remain attractive social network providers need to encourage use...
Hanna Krasnova, Natasha F. Veltri
AOSD
2007
ACM
13 years 11 months ago
Tribe: a simple virtual class calculus
Beginning with BETA, a range of programming language mechanisms such as virtual classes (class-valued attributes of objects) have been developed to allow inheritance in the presen...
Dave Clarke, Sophia Drossopoulou, James Noble, Tob...
POPL
2006
ACM
14 years 7 months ago
A virtual class calculus
Virtual classes are class-valued attributes of objects. Like virtual methods, virtual classes are defined in an object's class and may be redefined within subclasses. They re...
Erik Ernst, Klaus Ostermann, William R. Cook