Many recent models study the downstream projection from grid cells to place cells, while recent data have pointed out the importance of the feedback projection. We thus asked how grid cells are affected by the nature of the input from the place cells. We propose a single-layer neural network with feedforward weights connecting place-like input cells to grid cell outputs. Place-to-grid weights a...

We propose a new reliable MANET routing protocol which uses a logical two dimensional grid. The proposed protocol is called Efficient Grid-based Routing Protocol (E-GRP). E-GRP is based on the GRID routing protocol [1]. The main new features of E-GRP compared to GRID is the ability to work with different cell sizes by giving approximately same results in term of average end-to-end delay, number...

Grid cells in layer II of rat entorhinal cortex fire to spatial locations in a repeating hexagonal grid, with smaller spacing between grid fields for neurons in more dorsal anatomical locations. Data from in vitro whole-cell patch recordings showed differences in frequency of subthreshold membrane potential oscillations in entorhinal neurons that correspond to different positions along the dors...

<p>This paper presents an approach for optimal generation capacity mix to fulfill future power demand using a micro-grid model which is operated in both the on-grid and off-grid modes. This achieved solar photovoltaic (PV) system, fuel-cell, battery energy storage system (BESS) with without grid-connected mode. Different control approaches size of generators are presented. Proposed micro ...

ÐQuadtree-based adaptive Cartesian/Quad (quadrilateral) grid generator, grid adaptor and ̄ow solver have been developed and fully demonstrated in this study. Given the de®nition of geometries (cubic B-splines and straight line segments), geometrically-adaptive, body-®tted Quad grids are generated automatically. These grids are then overlapped with a large Cartesian cell which is subdivided recur...

Spatial cognition in mammals is thought to rely on the activity of grid cells in the entorhinal cortex, yet the fundamental principles underlying the origin of grid-cell firing are still debated. Grid-like patterns could emerge via Hebbian learning and neuronal adaptation, but current computational models remained too abstract to allow direct confrontation with experimental data. Here, we propo...

We characterize the relationship between the simultaneously recorded quantities of rodent grid cell firing and the position of the rat. The formalization reveals various properties of grid cell activity when considered as a neural code for representing and updating estimates of the rat's location. We show that, although the spatially periodic response of grid cells appears wasteful, the code is...

an enhamced scheme is introduced for the solution of two dimensional umsteady euler equations. the finite- volume method of jameson et al. is modified by devicing a pnessune sensor in cell flux calculations. then the discretized gorerning equations ane relaxed in time until na steady state is reached. an appropriate model for the artificial dissipation was also employed. several tests wene cond...

In this paper, the novel application of organic/inorganic perovskite hybrid materials isproposed for grid-connected Photo-voltaic (PV) cells. The perovskite hybrid cells attracted a lot of interest due to their potential in combining advantages of both components. Looking to the future, there is no doubt that these new generations of hybrid materials, born from the very fruitful activitie...