Results 81 to 90 of about 39,846 (313)
Factorisation in relational databases
, 2014 We study representation systems for relational data based on relational algebra expressions with unions, products, and singleton relations. Algebraic factorisation using the distributivity of product over union allows succinct representation of many-to-many relationships; further succinctness is brought by sharing repeated subexpressions.
openaire +2 more sources
Implementing imperfect information in fuzzy databases
, 2005 Information in real-world applications is often vague, imprecise and uncertain. Ignoring the inherent imperfect nature of real-world will undoubtedly introduce some deformation of human perception of real-world and may eliminate several substantial ...
Naija, Y. +5 more
core
Justification for inclusion dependency normal form
, 2000 Functional dependencies (FDs) and inclusion dependencies (INDs) are the most fundamental integrity constraints that arise in practice in relational databases.
Vincent, Millist W., Levene, Mark
core +1 more source
British Educational Research Journal, EarlyView.Abstract This paper is a systematic literature review (SLR) of research published between 2009 and 2022 that aims to identify facilitators and barriers to implementing staff development projects (SDPs) in schools in England. Twelve research papers fulfilled all inclusion criteria and were each evaluated as being at least medium‐quality research.
David Preston +2 more
wiley +1 more source
Communications of the ACM, 1982 It is well known that the growth in demands from end users for new applications is outstripping the capability of data processing departments to implement the corresponding application programs. There are two complementary approaches to attacking this problem (and both approaches are needed): one is to put end users into direct touch with the ...
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Representing fuzzy decision tables in a fuzzy relational database environment. [PDF]
In this paper the representation of decision tables in a relational database environment is discussed. First, crisp decision tables are defined. Afterwards a technique to represent decision tables in a relational system is presented.
Vanthienen, Jan, Wets, G, Chen, G
core
British Educational Research Journal, EarlyView.Abstract Recruiting and retaining school leaders is a challenge in many systems worldwide. Previous research has identified three distinct ways in which succession planning can be conceptualised and approached: a ‘pipeline’ approach seeks to match supply and demand for the posts that need filling; a ‘pool’ strategy involves proactively identifying and ...
Toby Greany +3 more
wiley +1 more source
A comparison of approaches to accessing existing biological and chemical relational databases via SPARQL. [PDF]
J Cheminform, 2023 Galgonek J, Vondrášek J.
europepmc +1 more source
British Educational Research Journal, EarlyView.Abstract As England embarks on its first comprehensive curriculum review in fifteen years, this paper offers critical insights from schools that sustained arts‐rich provision despite a policy landscape hostile to creative subjects. Drawing on data from the Researching Arts‐rich Primary Schools (RAPS) project—a mixed‐methods study of 76 arts‐rich ...
Pat Thomson, Christine Hall
wiley +1 more source
On the Potential of Relational Databases for the Detection of Clusters of Infection and Antibiotic Resistance Patterns. [PDF]
Antibiotics (Basel), 2023 Gelfusa M +10 more
europepmc +1 more source