Transfer Schemes (transfer + scheme)

Distribution by Scientific Domains


Selected Abstracts


Testing the Water: Practitioner Opinion of a Regional Credit Scheme (NICATS)

HIGHER EDUCATION QUARTERLY, Issue 3 2001
Anthony Cook
The Northern Ireland Credit Accumulation and Transfer Scheme encompasses all levels from introductory to doctoral. It was designed to facilitate the progression of learners through both the Further and Higher Education structures in Northern Ireland and has provided the model for developments elsewhere. Part of its development included a consultative procedure that involved curriculum specialists liaising with a wide range of practitioners to identify strengths and problematic areas within the scheme. The consultation found that, at the time (1998), practitioner awareness of CATS schemes was generally poor. Most teachers of lower level courses felt that the scheme in general would add value to their courses since it would place them within a hierarchical framework and indicate to their students clear forward progression routes. Many teachers of multilevel courses (in particular degrees) felt that attempting to define levels within a course would result in a loss of teacher autonomy and a reduction in the flexibility with which courses could be offered. Many interviewees stressed the sequential nature of their subject's structure and the perception that this caused problems for student progression through a system of levels based on generic descriptors. It is concluded that although there was broad practitioner support for NICATS, many of its potential benefits will only be realized after substantial staff development. When implemented, it should result not only in a more transparent description of courses but also substantial development in the delivery of curricula and the assessment of student learning. [source]


A dynamic common property resource problem with amenity value and extraction costs

INTERNATIONAL JOURNAL OF ECONOMIC THEORY, Issue 1 2005
Gerhard Sorger
C73; Q20; Q28 An analytically tractable differential game is presented that describes the exploitation of a common-property resource by finitely many competing players. The resource stock has an amenity value and there are positive extraction costs. We derive both the cooperative solution and Markov-perfect Nash equilibria of the non-cooperative game. After a comparative analysis of the equilibrium strategies and payoffs with respect to all model parameters, we study the effect of a unilateral extraction restriction and discuss the design of a revenue-neutral tax/transfer scheme that supports the cooperative solution. [source]


Parallel computation of a highly nonlinear Boussinesq equation model through domain decomposition

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, Issue 1 2005
Khairil Irfan Sitanggang
Abstract Implementations of the Boussinesq wave model to calculate free surface wave evolution in large basins are, in general, computationally very expensive, requiring huge amounts of CPU time and memory. For large scale problems, it is either not affordable or practical to run on a single PC. To facilitate such extensive computations, a parallel Boussinesq wave model is developed using the domain decomposition technique in conjunction with the message passing interface (MPI). The published and well-tested numerical scheme used by the serial model, a high-order finite difference method, is identical to that employed in the parallel model. Parallelization of the tridiagonal matrix systems included in the serial scheme is the most challenging aspect of the work, and is accomplished using a parallel matrix solver combined with an efficient data transfer scheme. Numerical tests on a distributed-memory super-computer show that the performance of the current parallel model in simulating wave evolution is very satisfactory. A linear speedup is gained as the number of processors increases. These tests showed that the CPU time efficiency of the model is about 75,90%. Copyright 2005 John Wiley & Sons, Ltd. [source]


Mesh adaptation and transfer schemes for discrete fracture propagation in porous materials

INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS, Issue 2 2007
Stefano Secchi
Abstract This paper presents a numerical procedure for cohesive hydraulic fracture problems in a multiphase system. The transient problem of crack nucleation and/or advancement, with the ensuing topological changes, is solved by successive remeshing and projection of the field variables required in the time marching scheme. The projection is directly applied to the nodal vector of the previous step and is performed by means of a suitable mapping operator which acts on nodal forces and fluxes. This hence ensures ,a priori' the local fulfilment of the balance equations (equilibrium and mass conservation). The resulting procedure is computationally simple; however checks have to be made on its capability of conserving strain energy of the system. The latter property together with the accuracy of the solution is heuristically assessed on the basis of numerical benchmarks. Copyright 2007 John Wiley & Sons, Ltd. [source]


Assessment of conservative load transfer for fluid,solid interface with non-matching meshes

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, Issue 15 2005
R. K. Jaiman
Abstract We present a detailed comparative study of three conservative schemes used to transfer interface loads in fluid,solid interaction simulations involving non-matching meshes. The three load transfer schemes investigated are the node-projection scheme, the quadrature-projection scheme and the common-refinement based scheme. The accuracy associated with these schemes is assessed with the aid of 2-D fluid,solid interaction problems of increasing complexity. This includes a static load transfer and three transient problems, namely, elastic piston, superseismic shock and flexible inhibitor involving large deformations. We show how the load transfer schemes may affect the accuracy of the solutions along the fluid,solid interface and in the fluid and solid domains. We introduce a grid mismatching function which correlates well with the errors of the traditional load transfer schemes. We also compare the computational costs of these load transfer schemes. Copyright 2005 John Wiley & Sons, Ltd. [source]