Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"OCL"”.
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OCL exception handling
Object Constraint Language (OCL) is part of the Unified Modeling Language (UML) specification and can be used to enforce constraints on the attributes or methods of a class. It would greatly help the software developers if such non-executable OCL constraints specified in a UML model could be …
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Online collaborative learning in tertiary ICT education to enhance students' learning in Malaysia
… of an online collaborative learning (OCL) initiative, with its aim to enhance students’ learning in a Malaysian tertiary classroom. In order to contribute to knowledge and understanding about the nature and quality of OCL, the learning processes and outcomes were drawn predominantly …
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Integrating online cooperative learning into the English as a foreign language writing curriculum: a modelling trial
… to explore whether online cooperative learning (OCL) with elements of Social Interdependence Theory (SIT) could actually manifest during learning and teaching online and whether there may be initial evidence that OCL could be effective at raising EFL learners’ writing attainment. A …
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An interpreter for object comprehension query language
… incorporates Object Comprehension Language (OCL) as a query interface. This paper introduces an interpreter that evaluates the OCL query language against an in-memory database.
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Model-Based Analysis of Role-Based Access Control
… this end, we use two UML profiles and associated OCL constraints that provide the modelling and analysis features. We propose a taxonomy of OCL constraints and use it to define a partial order between categories of constraints, that we use to propose strategies to speed up the models’ evaluation …
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Theoretical study of performance characteristics of semiconductor quantum dot lasers
… internal loss in the optical confinement layer (OCL) on the characteristic temperature. Internal optical loss in a QD laser couples the confined-carrier level occupancy in QDs to the free-carrier density in the OCL. Due to this coupling, which is controlled by the threshold condition, the …
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Um metamodelo da linguagem de modelagem real time UML, de suporte à criação de dicionário de dados para ferramentas de modelagem de sistema tempo real, visando a verificação de consistência dos modelos
… regras descritas em linguagem de modelagem OCL (Object Constraint Language) são utilizadas como um formalismo adicional ao metamodelo. Com estas descrições em OCL será possível a diminuição das possíveis ambigüidades e inconsistências, além de complementar as limitações impostas pelo caráter …
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A qualitative analysis of small business owner-managers' participation and learning in an online discussion forum : not quite paradise found
… research was an online collaborative learning (OCL) forum that provided the basis of the case study reported in this thesis. The research was undertaken to explore the following research questions: Does an ODF empower SBOMs as active learners? What factors (internal and external) lead to …
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Designing precise and flexible graphical modelling languages for software development
… The creation of the Object Constraint Language (OCL) and its integration into the Unified Modeling Language (UML) specification. • The identification of requirements and mechanisms for increasing the flexibility of the UML specification. • The design and implementation of tools for implementing …
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Advanced adaptive classifier methods for data streams
… classification tasks. Online Continual Learning (OCL) addresses the issue where NN learning from an evolving data stream forgets its past knowledge when confronted with a distribution shift. Online Domain Incremental Continual Learning (ODICL) is a specific variant of OCL where the input data …
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Structural and Mechanistic Roles of Novel Chemical Ligands on Quorum Sensing Transcription Regulator SdiA in Enterohemorrhagic Escherichia coli
… endogenous ligand, 1-octanoyl-rac-glycerol (OCL), which is ubiquitously found throughout the tree of life, and serve as energy sources, signaling molecules, and substrates for membrane biogenesis. While exogenous AHL renders SdiA much higher stability and DNA binding affinity, we propose that …
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Analysis and Design of Stable and Optimal Energy Management Strategies for Hybrid Electric Vehicles
… vehicle simulators. The optimal control law (OCL) proposed in this dissertation is compared against dynamic programming (DP) and a version of equivalent consumption minimization strategy (ECMS) based on Pontryagin’s minimum principle. The OCL strategy is further modified to develop a …
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Quantifying periods of diffusion in marine and nonmarine vertebrate fossils using rare earth elements
… incorporation. An outer circumferential layer (OCL) is preserved along the outer 1 mm of the brontothere rib (F08-10) and femur (F08-09). REE concentrations in the OCL are much lower than in the underlying bone, indicating either lower incorporation or post fossilization leaching. REE …
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Formal Verification of Relational Model Transformations using an Intermediate Verification Language
… encapsulates an EMF metamodels library and an OCL library within Boogie. The result is reduced cost and time required for a verifier’s construction. Furthermore, VeriMTLr includes an ASM and EMFTVM bytecode library, enabling an automated translation validation approach to ensuring the soundness …
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The Chlorination of Triclosan: A Kinetic Study
… the rate coefficients for the reactions between HOCl and both neutral and anionic forms of triclosan was generated to fit the experimental data. The anionic free chlorine species hypochlorite (OCl-) was determined to play an insignificant role in the overall rate of reaction, and therefore, only …
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Searching for the low-energy enhancement in 91zR
… was conducted at the Oslo Cyclotron Laboratory (OCL). The SiRi (silicon telescope) array was used to detect charged ejectiles from the reaction. The CACTUS (NaI(Tl) detectors) array was utilized to detect rays that were in coincidence with charged particles. The nuclear level density and SF were …
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Developing VDM ++ operations from UML diagrams
… development of the Object Constraints Language(OCL) in the last few years seems to be the answer to this problem, but someargue that it is difficult to use. In addition, inadequate information and lackof precise definitions of UML models [31] are the two main reasons why currentexisting OO …
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Ionic conductivity transitions in antiperovskite ionic conductors
… in ionic conductivity in stoichiometric AP Na₃OCl is related with an octahedral to cubic phase transition with increasing octahedral tilt disorder. We then present two novel cluster ion AP electrolytes Li₂(OH)Cl and Na₂(NH₂)(BH₄) in which paddlewheel and double paddlewheel mechanism with high …
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Manganese removal by oxidation and mixed-media filtration
… modes. The oxidants used were dllorine (HOCl/OCl⁻) , potassium permanganate (KMnO₄), chlorine dioxide (ClO₂), and ozone (O₃). Other experimental parameters included: filter media type - manganese coated or non-coated, filter loading rate --2 to 5 gpm/f², operating pH -- pH 6 to pH 9, and …
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Kōura (Paranephrops planifrons) populations in the Te Arawa lakes: An ecological assessment using the traditional Māori tau kōura harvesting method and recommendations for sustainable management
… size range (6 – 50 mm Orbit Carapace Length, OCL) of kōura in both shallow (5 m mean depth) and moderately deep water (10 – 17 m depth) in Ōkere Arm and Te Ākau, Lake Rotoiti, respectively. This method also distinguished differences in size structure and biomass between sites and provided …
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