A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is application/pdf.
Filters
On Path Integration of Grid Cells: Group Representation and Isotropic Scaling
[article]
2021
arXiv
pre-print
Preserved Fulltext
Other Versions
We identify two conditions on the transformation. One is a group representation condition that is necessary for path integration. ...
In this paper, we conduct theoretical analysis of a general representation model of path integration by grid cells, where the 2D self-position is encoded as a higher dimensional vector, and the 2D self-motion ...
We thank Yaxuan Zhu from UCLA Department of Statistics for his help with experiments on egocentric vision. We thank Dr. ...
arXiv:2006.10259v6
fatcat:beai27vihbfwlkfon6ntfbyp7i
Coordinated learning of grid cell and place cell spatial and temporal properties: multiple scales, attention and oscillations
2013
Philosophical Transactions of the Royal Society of London. Biological Sciences
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
The model responds to realistic rat navigational trajectories by learning both grid cells with hexagonal grid firing fields of multiple spatial scales, and place cells with one or more firing fields, that ...
The model's parsimonious properties include: similar ring attractor mechanisms process linear and angular path integration inputs that drive map learning; the same SOM mechanisms can learn grid cell and ...
This article focuses upon a model of how path integration information is represented by MEC grid cells and HC place cells. ...
doi:10.1098/rstb.2012.0524
pmid:24366136
pmcid:PMC3866446
fatcat:2icdnof7hzhcbbwzpardmn4mfi
A unified theory for the computational and mechanistic origins of grid cells
[article]
2020
bioRxiv
pre-print
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is application/pdf.
Here we forge an intimate link between the computational problem of path-integration and the existence of hexagonal grids, by demonstrating that such grids arise generically in biologically plausible neural ...
The discovery of entorhinal grid cells has generated considerable interest in how and why hexagonal firing fields might mechanistically emerge in a generic manner from neural circuits, and what their computational ...
., the Office of Naval Research N00141812690, Simons Foundation SCGB 542987SPI, NIMH MH106475, and the James S McDonnell Foundation for L.M.G., and the Simons and James S McDonnell foundations, and an ...
doi:10.1101/2020.12.29.424583
fatcat:f3irtvi2trao5pi44plwomeybm
Extracting grid cell characteristics from place cell inputs using non-negative principal component analysis
2016
eLife
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
We thus asked how grid cells are affected by the nature of the input from the place cells. ...
Consistent with experiments, grid spacing ratio between the first two consecutive modules is −1.4. Our results express a possible linkage between place cell to grid cell interactions and PCA. ...
Acknowledgements We would like to thank Alexander Mathis and Omri Barak for comments on the manuscript, and Gilad Tocker and Matan Sela for helpful discussions and advice. ...
doi:10.7554/elife.10094
pmid:26952211
pmcid:PMC4841785
fatcat:lrxpqe4oevd7lihb6i2f32q4re
Grid-cell representations in mental simulation
2016
eLife
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
Furthermore, we capitalize on the six-fold rotational symmetry of grid-cell firing to demonstrate a 60° periodic pattern-similarity structure in the entorhinal cortex. ...
Grid-like representations have been observed in the human entorhinal cortex during virtual and imagined navigation. ...
The authors would like to thank S Collin and B Milivojevic for comments on the manuscript and A Backus for helpful discussions. ...
doi:10.7554/elife.17089
pmid:27572056
pmcid:PMC5005038
fatcat:wcobvp4gybbrfjkbxpje6gv7qi
Probabilistic Learning by Rodent Grid Cells
2016
PLoS Computational Biology
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
No plausible model exists which explains stable grids in darkness for twenty minutes or longer, despite being one of the first results ever published on grid cells. ...
Of the known spatial cells, grid cells form strikingly regular and stable patterns of activity, even in darkness. ...
Barry
Author Contributions Conceived and designed the experiments: A.C.
Performed the experiments: A.C. Analyzed the data: A.C.
Contributed reagents/materials/analysis tools: A.C. ...
doi:10.1371/journal.pcbi.1005165
pmid:27792723
pmcid:PMC5085080
fatcat:wnhsi6a4g5h25ioq4fmwr5j6yy
An Efficient Coding Theory for a Dynamic Trajectory Predicts non-Uniform Allocation of Grid Cells to Modules in the Entorhinal Cortex
[article]
2016
arXiv
pre-print
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
This readout scheme requires persistence over varying timescales, ranging from ~1ms to ~1s, depending on the grid cell module. ...
Grid cells in the entorhinal cortex encode the position of an animal in its environment using spatially periodic tuning curves of varying periodicity. ...
An earlier version of this work appeared in abstract form (Weiss et al., 2015) . ...
arXiv:1601.02948v1
fatcat:5n7iiv4xffecnntxjzixck5rde
Mesoscale Theory of Grains and Cells: Crystal Plasticity and Coarsening
2006
Physical Review Letters
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
Other Versions
While both the microscopic laws of dislocation motion and the macroscopic laws of coarsening and plastic deformation are well studied, we hitherto have had no simple, continuum explanation for the evolution ...
At low temperatures under shear the dislocations (which allow only glide) form into cell structures. ...
We seek to count the number of times the isotropic representations of the rotation group occurs within the products. ...
doi:10.1103/physrevlett.96.095503
pmid:16606276
fatcat:ucxo2ppqhzfeboegbmhrhp25xe
Evidence for grid cells in a human memory network
2010
Nature
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2011; you can also visit the original URL.
The file type is application/pdf.
Jeffery and J. O'Keefe for providing help and facilities for single-unit recording; the Wellcome Trust Centre for Neuroimaging at UCL for providing help and scanning facilities; J. Krupic and R. ...
King for help with virtual reality programming; and useful discussions with P. Dayan, K. Friston, U. ...
may provide a neural substrate for path integration [1] [2] [3] 6 . ...
doi:10.1038/nature08704
pmid:20090680
pmcid:PMC3173857
fatcat:iwuojvemafdlxntnxedbe5jhmu
PERCEPTUAL GROUPING OF MEMBRANE SIGNALS IN CELL-BASED ASSAYS
2007
2007 4th IEEE International Symposium on Biomedical Imaging: From Nano to Macro
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2016; you can also visit the original URL.
The file type is application/pdf.
Their intensity distributions are often heterogeneous and may lack specificity. Grouping of these linear structures can aid in segmentation and quantitative representation of protein localization. ...
Application of this technique to quantitative analysis of cell-cell adhesion mediated by integral cell membrane proteins is demonstrated. ...
Both monolayers and complex structures require cell-cell adhesion mediated by integral cell membrane proteins. ...
doi:10.1109/isbi.2007.356906
dblp:conf/isbi/ChangAHBP07
fatcat:clxjeuz5k5bbxlcbv7fcsanpcy
Combining cell-based hydrodynamics with hybrid particle-field simulations: efficient and realistic simulation of structuring dynamics
2017
Soft Matter
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
We additionally implemented and tested an alternative and more isotropic finite difference gradient. ...
Merging MD-SCF with multi-particle collision dynamics (MPCD), we mimic particle collisions at the level of computational cells and at the same time properly account for the momentum transfer that is important ...
GJAS and FS acknowledge funding by the VW foundation in the context of an international project Multiscale hybrid modeling of (bio)membranes. ...
doi:10.1039/c6sm02252a
pmid:28128838
fatcat:t4tuwxswajfgdbvy4laeuo63j4
TURBULENT CELLS IN STARS: FLUCTUATIONS IN KINETIC ENERGY AND LUMINOSITY
2011
Astrophysical Journal
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
Note that this fulltext copy is not of the "primary" version of this work. The version it corresponds to is:
2010 pre-print arXiv:1012.1848v1 fatcat:ddez36nfvzb27honof7vuuvw7mOther Versions
We examine some implications of this simplest approximation, and suggest paths for improvement. ...
Using the Lorenz model as representative of a convective cell, a multiple-cell model of a convective layer gives total luminosity fluctuations which are suggestive of irregular variables (red giants and ...
This work was supported in part by NSF Grant 0708871 and NASA Grant NNX08AH19G at the University of Arizona. One of us (DA) wishes to thank Fr. Jose Fuñes and the Specalo Vaticano, Prof. ...
doi:10.1088/0004-637x/741/1/33
fatcat:fowvt6xdqffwjbg4x5pr2cv67y
Realism of Lagrangian large eddy simulations driven by renalysis meteorology: Tracking a pocket of open cells under a biomass burning aerosol layer
2021
Journal of Advances in Modeling Earth Systems
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2022; you can also visit the original URL.
The file type is application/pdf.
A boundary layer cold and dry bias occurring in LES can be counteracted by reducing the grid aspect ratio and by tightening the large scale wind speed nudging towards the surface. ...
to open cells seen in the satellite imagery on the three considered trajectories. ...
Acknowledgments We thank Tom Goren, Wayne Angevine, and Ryuji Yoshida, Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, and Chemical Sciences Laboratory, National ...
doi:10.1029/2021ms002664
pmid:35865715
pmcid:PMC9287006
fatcat:tlzeemkfjnd5vasqaedqgae6gu
Modelling cell migration strategies in the extracellular matrix
2008
Journal of Mathematical Biology
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
Amoeboid cell populations migrate in the ECM by making frequent shape changes and have minimal impact on its structure. ...
the pattern and rate of cell infiltration, including the formation of characteristic "fingering" patterns. ...
Acknowledgments The author would like to express his gratitude to Thomas Hillen, who has provided the stimulant for much of this work as well as a number of highly constructive suggestions. ...
doi:10.1007/s00285-008-0217-8
pmid:18787826
fatcat:brq5cl4i75dhlgdpghdndqv6qy
Apar-T: code, validation, and physical interpretation of particle-in-cell results
2013
Astronomy and Astrophysics
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
Other Versions
One is that PIC collision- and fluctuation-induced thermalization times are expected to scale with the number of superparticles per grid cell, and thus to be a factor p 10^10 smaller than in real plasmas ...
These models rely on two building blocks: coarse-graining, i.e., grouping of the order of p 10^10 real particles into a single computer superparticle, and field storage on a grid with its subsequent finite ...
Some of the simulations have been performed at pôle scientifique de modélisation numérique, PSMN, at ENS-Lyon, whose staff we thank for their steady technical support. ...
doi:10.1051/0004-6361/201321557
fatcat:42vd5eyprzdcflaaflfwwiuzeq
« Previous
Showing results 1 — 15 out of 10,067 results