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REPEATABLE DEPLOYMENT OF AN OPEN STANDARDS, OPEN SOURCE AND OPEN DATA STACK FOR BUILDING A FEDERATED MARINE DATA MANAGEMENT AND DECISION SUPPORT SYSTEM FOR SOUTH AFRICA
Open standards Interoperability Data Management System CKAN CSW Case Study Distributed Systems Architecture Oceans and Coasts DevOps
2018/11/8
The National Oceans and Coastal Information Management System (OCIMS) of South Africa is a large, integrated IT system for enhancing oceans, coastal and maritime governance, and supporting sustainable...
Fast Slant Stack: A notion of Radon Transform for Data in a Cartesian Grid which is Rapidly Computible, Algebraically Exact, Geometrically Faithful and Invertible
Radon Transform Projection-slice theorem Sinc-Interpolation,
2015/8/21
We define a notion of Radon Transform for data in an n by n grid. It is based on summation
along lines of absolute slope less than 1 (as a function either of x or of y), with values at non-Cart...
Some improvements in subbasalt imaging using pre-stack depth migration
improvements subbasalt imaging pre-stack depth migration
2014/12/31
Subbasalt imaging can be improved by carefully
applying pre-stack depth migration. Pre-stack depth migration requires a detailed velocity model and an accurate traveltime calculation.
Direct calculation of higher rank invariants of stable pairs using the Joyce machinery of stack functions
higher rank invariants Direct calculation Joyce machinery stack functions
2011/8/23
Abstract: The rank 2 invariants of stable pairs over a Calabi-Yau threefold were computed in (arXiv:1101.2252) using the wall-crossing formula of Joyce-Song and Kontsevich-Soibelman. The computations ...
Tunneling anisotropic magnetoresistance of NiFe/IrMn/MgO/Pt stack: An antiferromagnet based spin-valve
anisotropic magnetoresistance NiFe/IrMn/MgO/Pt stack
2010/11/22
Spin-valve is a microelectronic device in which high and low resistance states are realized by utilizing both charge and spin of carriers. Spin-valve struc-tures used in modern hard drive read-heads a...
The Period-Index Problem for the Stack of Regularly Stable Sp(2n)-Bundles over a Curve
Period-Index Problem Stack of Regularly Stable Sp(2n)-Bundles
2010/12/9
Let Sp2n be the symplectic group over k, an algebraically closed field of characteristic 0; and let X denote a smooth, projective, connected curve over k of genus g 2. There is a stack Bunrs Sp2n of...
The symplectic Deligne-Mumford stack associated to a stacky polytope
symplectic Deligne-Mumford stack stacky polytope
2010/12/8
We discuss a symplectic counterpart of the theory of stacky fans. First, we define a stacky
polytope and construct the symplectic toric Deligne–Mumford stack associated to it. Then we establish a rel...
Stack-Sortable Permutations and Polynomials
Catalan numbers stack-sortable permutations permutations acting on polynomials
2010/2/25
The Catalan numbers show up in a diverse variety of counting problems. In this note we give yet another characterization of the Catalan number C(n). It is characterized as the dimension of a certain s...