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Now showing items 241-248 of 248
Sources of primary production supporting food webs in an arid coastal embayment
(
Springer Nature
, 2012 , Article)
Penaeid shrimp can be useful ecological indicators of linkages between shallow tropical coastal habitats, acting as integrators of carbon and nitrogen sources due to their generalist feeding habits and their mobility between ...
Constraint-enhanced role engineering via answer set programming
(
Association for Computing Machinery
, 2012 , Conference Paper)
Role engineering (RE) aims to develop and maintain appropriate role-based access control (RBAC) configurations. However, RE with constraints in place is not well-studied. Constraints usually describe organizations' security ...
Compliance checking for usage-constrained credentials in trust negotiation systems
(
Springer Berlin Heidelberg
, 2012 , Conference Paper)
We propose an approach to placing usage-constraints on RT credentials; issuers specify constraints by designing non-deterministic finite automata. We show by examples that this approach can express constraints of practical ...
Tracking and constraining authorization provenance
(
Springer Berlin Heidelberg
, 2012 , Conference Paper)
Authorization provenance concerns how an authorization is derived. It appears important to define authorization provenance to (1) analyze policy bases, (2) defend against a class of attacks, and (3) audit authorizations. ...
A novel technique for extraction of geothermal energy from abandoned oil wells
(2012 , Conference Paper)
This paper investigates the possibility of design and construction of a geothermal heat exchanger suitable for installation in abandoned oil wells. Based on the in-situ data collected, an amenable heat transfer numerical ...
Extracellular matrix (ECM)
(
Springer Netherlands
, 2012 , Book chapter)
Summary: The region of space at the periphery of cyanobacterial cells is the interface between the environment and intracellular processes. This metaspace may include a structure appressed to the outer wall and membrane, ...
Isolation of entomopathogenic Bacillus from a biodynamic olive farm and their pathogenicity to lepidopteran and coleopteran insect pests
(
Elsevier Ltd
, 2012 , Article)
The occurrence of Bacillus entomopathogenic bacteria on a Tunisian biodynamic farm was determined by examining 75 samples from olive tree (Olea europaea L.) habitats. A total of 40 Bacillus isolates were characterized ...
All that glitters is not gold: Challenges of teacher and school leader licensure licensing system in Qatar
(
Elsevier Ltd
, 2012 , Article)
In 2001, the Government of Qatar began a comprehensive education reform (Education for a New Era)
based on RAND’s recommendations and options for building an educational system that would meet the
country’s changing ...