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Power diagrams and sparse paged grids for high resolution adaptive liquids

Mridul Aanjaneya, Ming Gao, Haixiang Liu, Christopher Batty, Eftychios Sifakis
2017 ACM Transactions on Graphics  
Batty would like to thank Ted Ying for carrying out preliminary explorations on quadtrees. populated uniform grid for high resolution interface tracking with a narrow band level set representation.  ...  Using the recently introduced SPGrid data structure, sparse uniform grids in both the power diagram discretization and our narrow band level set can be compactly stored and efficiently updated via streaming  ...  Second, a low-level data structure named SPGrid (or "Sparse Paged Grid") was proposed for compact storage and efficient stream processing of sparsely populated uniform grids.  ... 
doi:10.1145/3072959.3073625 fatcat:2znloe3rjvgqde3naillzkoh2e

Out-of-core and compressed level set methods

Michael B. Nielsen, Ola Nilsson, Andreas Söderström, Ken Museth
2007 ACM Transactions on Graphics  
recently proposed narrow band data structures like the DT-Grid of Nielsen and Museth [2006] and the H-RLE of Houston et al. [2006].  ...  We also demonstrate that our compression techniques out-perform state-of-the-art compression algorithms for narrow bands.  ...  Thanks also goes to Brian Bunch Christensen and Gunnar Johansson for commenting on early drafts of this paper.  ... 
doi:10.1145/1289603.1289607 fatcat:z6idsmulffcaxfavkmtthpgbza

SPGrid

Rajsekhar Setaluri, Mridul Aanjaneya, Sean Bauer, Eftychios Sifakis
2014 ACM Transactions on Graphics  
Our enabling contribution is SPGrid, a new data structure for compact storage and efficient stream processing of sparsely populated uniform Cartesian grids.  ...  We show how the costliest algorithmic kernels of fluid simulation can be implemented as a composition of two kernel types: (a) stencil operations on a single sparse uniform grid, and (b) structured data  ...  We propose a data structure for sparsely-populated uniform grids, as one might use for example to solve a narrow-band level set problem.  ... 
doi:10.1145/2661229.2661269 fatcat:w5wtaks7dbbadb5zcagog2p3sq

A geometry optimization framework for photonic crystal design

E.E. Hart, A. Sóbester, K. Djidjeli, M. Molinari, K.S. Thomas, S.J. Cox
2012 Photonics and Nanostructures - Fundamentals and Applications  
As an illustration, we apply this technology to the design of a two-dimensional photonic crystal structure; the result features a large complete band gap structure and a topology that is different from  ...  We also consider a methodology for assessing the robustness of the optima generated through this process, investigating the impact of manufacturing errors on their performance.  ...  (TM) cavity mode, a wide separation of high-and lowfrequency bands, sharp density of state band edges, flat bands, extremely large (or narrow and clearly defined) gap-to-midgap frequency ratios, identical  ... 
doi:10.1016/j.photonics.2011.06.005 fatcat:f35ppdfhevgijiisx2h45dneni

An efficient, scalable, and adaptable framework for solving generic systems of level-set PDEs

Kishore R. Mosaliganti, Arnaud Gelas, Sean G. Megason
2013 Frontiers in Neuroinformatics  
Jim Miller (GE USA), for comments on the level-set design. We thank Dr.  ...  Sparse methods visit only the narrow band layers while the dense method visits every pixel in the level-set domain.  ...  The sparse representation (also sometimes called as narrow-band) discretizes the level-set function only around the zero level-curve.  ... 
doi:10.3389/fninf.2013.00035 pmid:24501592 pmcid:PMC3872740 fatcat:dkqoocauunbw7ohuw56buvlmge

The Design of Shared Aperture Antennas Consisting of Differently Sized Elements

C.I. Coman, I.E. Lager, L.P. Ligthart
2006 IEEE Transactions on Antennas and Propagation  
The sparse architectures are designed using a combinatorial method that ensures an acceptable behavior in the side-lobes region in conjunction with a narrow beamwidth.  ...  interleaved on a common (shared) aperture.  ...  From that behavior, it can be derived that two bands [GHz] and [GHz] (separated by a narrow gap of 0.2 GHz) are obtained for a voltage standing wave ratio .  ... 
doi:10.1109/tap.2005.863382 fatcat:22odnaxxcnd3jeivavwfcnr7mu

Level set formulation of two-dimensional Lagrangian vortex detection methods

Alireza Hadjighasem, George Haller
2016 Chaos  
Our level-set formulation captures an a priori unknown number of vortices simultaneously at relatively low computational cost.  ...  The second energy function is derived for a graph-based approach to vortex boundary detection [Hadjighasem et al., Phys. Rev. E 93, 063107 (2016)].  ...  ACKNOWLEDGEMENTS The authors would like to thank Mattia Serra and David Oettinger for helpful discussions on the subject of this paper.  ... 
doi:10.1063/1.4964103 pmid:27802672 fatcat:gk7kfc62unexjndoufsls3mxt4

For the Grid and Through the Grid: The Role of Power Line Communications in the Smart Grid

Stefano Galli, Anna Scaglione, Zhifang Wang
2011 Proceedings of the IEEE  
Finally, this paper reports recent studies on the electrical and topological properties of a sample power distribution network.  ...  We then address Smart Grid applications as instances of sensor networking and network control problems and discuss the main conclusions one can draw from the literature on these subjects.  ...  like to express their gratitude to John Boot (General Electric), Anand Dabak (Texas Instruments), Mischa Schwartz (Columbia University), and Gary Stuebing (Duke Energy) for many stimulating discussions on  ... 
doi:10.1109/jproc.2011.2109670 fatcat:l7doso7v25f5vbnxmkuzhtdcuu

A Bayesian Approach to Sparse Model Selection in Statistical Shape Models

Ali Gooya, Christos Davatzikos, Alejandro F. Frangi
2015 SIAM Journal of Imaging Sciences  
When the number of points on the sets varies across the population, each point set is often regarded as a spatially transformed Gaussian mixture model (GMM) sample, and the registration problem is formulated  ...  We propose an EM framework, adopting a symmetric Dirichlet distribution as a prior, to enforce sparsity on the mixture weights of Gaussians.  ...  in the narrow bands.  ... 
doi:10.1137/140982039 fatcat:hsn7mqoxsjdaxnnndjdubhdxxq

For the Grid and Through the Grid: The Role of Power Line Communications in the Smart Grid [article]

Stefano Galli, Anna Scaglione, Zhifang Wang
2011 arXiv   pre-print
Finally, this paper reports recent studies on the electrical and topological properties of a sample power distribution network.  ...  Power grid topological studies are very important for PLC networking as the power grid is not only the information source but also the information delivery system - a unique feature when PLC is used for  ...  like to express their gratitude to John Boot (General Electric), Anand Dabak (Texas Instruments), Mischa Schwartz (Columbia University), and Gary Stuebing (Duke Energy) for many stimulating discussions on  ... 
arXiv:1010.1973v2 fatcat:myw3py2peng5hlaqeckb2ltkdm

Staying alive: Dalmatian mediated blocking of apoptosis is essential for tissue maintenance

Bilal E. Kerman, Deborah J. Andrew
2010 Developmental Dynamics  
Acknowledgements The authors would like to acknowledge helpful discussions with Ben Mitchinson, Tom Stafford, Jim Stone, and Mat Evans (University of Sheffield), and comments on a previous draft from Paul  ...  What are the implications of taking a topological map with a set of connections that result from optimizing a narrow target distribution, and then moving every neuron to a random location on the cortical  ...  ., why should evolution have optimized for a narrow target connectivity distribution?  ... 
doi:10.1002/dvdy.22281 pmid:20503358 pmcid:PMC3086122 fatcat:a3e4lujxhjc3fkbbo5ylcjbo4u

Multi-LiDAR Mapping for Scene Segmentation in Indoor Environments for Mobile Robots

Pavel Gonzalez, Alicia Mora, Santiago Garrido, Ramon Barber, Luis Moreno
2022 Sensors  
First, a scan matching algorithm based on ICP with distance threshold association counter is used as a multi-objective-like fitness function.  ...  Then, with Harmony Search, results are optimized without any previous initial guess or odometry.  ...  For 3D maps and full 6DOF, the band has six musicians, one for each variable in p, searching an optimal location for all six variables at the same time.  ... 
doi:10.3390/s22103690 fatcat:uyoglpviqbfnjpgirqdqca5lnq

VSP—a quantum-electronic simulation framework

Oskar Baumgartner, Zlatan Stanojevic, Klaus Schnass, Markus Karner, Hans Kosina
2013 Journal of Computational Electronics  
A layered software design allows VSP's existing components such as models and solvers to be combined in a multitude of ways, and new components to be added easily.  ...  It is an extensive software tool that includes models for band structure calculation, self-consistent carrier concentrations including strain, mobility, and transport in transistors and heterostructure  ...  Acknowledgements This work has been supported by the Austrian Science Fund program F025 (IR-ON), and the Austrian Research Promotion Agency, project 838551 (NeGFQTS).  ... 
doi:10.1007/s10825-013-0535-y fatcat:cgaco3p53rgrphmmagsk53ufki

Semiconductor-ferromagnet-superconductor planar heterostructures for 1D topological superconductivity [article]

Samuel D. Escribano, Andrea Maiani, Martin Leijnse, Karsten Flensberg, Yuval Oreg, Alfredo Levy Yeyati, Elsa Prada, Rubén Seoane Souto
2022 arXiv   pre-print
Our proposal provides a magnetic field-free planar design for quasi-one-dimensional topological superconductivity with attractive properties for experimental control and scalability.  ...  gap that can reach half of the SC one.  ...  Hence, its precise value may affect the topological properties of the wire as well as the optimal FI thickness to have a topological phase.  ... 
arXiv:2203.06644v1 fatcat:vrbtfddpebgnnlq7mbs5fgqijq

What, if anything, are topological maps for?

Stuart P. Wilson, James A. Bednar
2015 Developmental Neurobiology  
The paper is intended as a non>technical introduction to the assumptions and predictions of these four important classes of models, along with other possible functional explanations for maps. topological  ...  We argue that i) self>organizing maps yield spatial patterning only as a byproduct of efficient mechanisms for developing environmentally appropriate distributions of feature preferences, ii) wiring optimization  ...  The authors would like to acknowledge helpful discussions with Ben Mitchinson, Tom Stafford, Jim Stone, and Mat Evans (University of Sheffield), and comments on a previous draft from Paul Wilson (University  ... 
doi:10.1002/dneu.22281 pmid:25683193 fatcat:b4wjyrifufdjvfdw7hiw5wzr4y
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