Results 71 to 80 of about 2,980 (171)
Determination of the normalization level of database schemas through equivalence classes of attributes [PDF]
In this paper, based on equivalence classes of attributes there are formulated necessary and sufficient conditions that constraint a database schema to be in the second, third or Boyce-Codd normal forms. These conditions offer a polynomial complexity for
Cotelea Vitalie
doaj
The Schiotia Species of Southern Africa.
No abtract ...
L. E. Codd
doaj +1 more source
The Genus Rabdosia in South ...
L. E. Codd
doaj +1 more source
Fehlererkennende Registermaschinen in Codd's Zellularraum
Am Beispiel von Codd's Raum wird gezeigt, wie sich das berechnungsuniverselle Konzept von Registermaschinen in einem Zellularraum so implementieren läßt, daß beim Lösen rekursiver Aufgaben erreichte Zellen selbstätig auf Defekte getestet und mögliche Rechenfehler erkannt werden.
Wachsmuth, Ipke +2 more
openaire +1 more source
On the Codd Semantics of SQL Nulls
Theoretical models used in database research often have subtle differences with those occurring in practice. One particular mismatch that is usually neglected concerns the use of marked nulls to represent missing values in theoretical models of incompleteness, while in an SQL database these are all denoted by the same syntactic NULL object.
Guagliardo, Paolo; id_orcid 0000-0003-0756-5787 +1 more
openaire +1 more source
Change of direction and deceleration deficits in adolescent male soccer players at different maturity levels. [PDF]
Sert V +3 more
europepmc +1 more source
<i>julius seizure</i> acts within <i>teashirt</i> -expressing neurons to protect <i>Drosophila melanogaster</i> from bang-sensitivity. [PDF]
Dean DM +12 more
europepmc +1 more source
Mechanistic Insights into Dioxygen Transport Routes in the PHD2 Oxygenase from Long-Time Scale Simulations. [PDF]
Wiley B, Furini S, Domene C.
europepmc +1 more source

