Variation management in additive manufacturing (AM) is progressively more important as technologies are implemented industrial systems; hence massive research efforts focused on the modeling and optimization of process parameters effect final part quality. These are, however, hampered by very problem they seeking to solve, conclusions weakened poor validity, reliability, repeatability. This pap...

Wedeen et al. (Reports, 30 March 2012, p. 1628) proposed a geometrical grid pattern in the brain that could help the understanding of the brain's organization and connectivity. We show that whole-brain fiber crossing quantification does not support their theory. Our results suggest that the grid pattern is most likely an artifact attributable to the limitations of their method.

The paper presents a new path planning and replanning algorithm based on two-dimensional occupancy grid map of the environment, which integrates the focused D* (FD*) algorithm and Witkowski’s algorithm. The FD* algorithm is used for fast replanning and Witkowski’s algorithm is used for generating all optimal paths in the grid map. Our algorithm finds the shortest path in the geometrical space b...

Oscillatory interference models account for the spatial firing properties of grid cells in terms of neuronal oscillators with frequencies modulated by the animal's movement velocity. The phase of such a "velocity-controlled oscillator" (VCO) relative to a baseline (theta-band) oscillation tracks displacement along a preferred direction. Input from multiple VCOs with appropriate preferred direct...

Grid cells of the medial entorhinal cortex exhibit a periodic and stable pattern of spatial tuning that may reflect the output of a path integration system. This grid pattern has been hypothesized to serve as a spatial coordinate system for navigation and memory function. The mechanisms underlying the generation of this characteristic tuning pattern remain poorly understood. Systemic administra...

In this paper we present a cluster based approach to using a sensor’s sensibility and laser signal to address both sensor node localization and K-coverage problems. After sensors were randomly deployed, a virtual grid was mapped over the deployment area. Location guided laser beams are projected to the centers of grid cells to trigger sensors within one hop of communication range to form sensor...

background and aims. the aim of this study was to compare shear bond strength (sbs) of metal and ceramic brackets bonded to enamel using acid versus er:yag laser etching. materials and methods. eighty premolars were divided into 4 groups: am (acid etching/ metal brackets), ac (acid etching/ ceramic brackets), lm (laser etching/ metal brackets) and lc (laser etching/ ceramic brackets). enamel co...

The bitmap obtained by scanning a printed pattern depends on the exact location of the scanning grid relative to the pattern. We consider ideal sampling with a regular lattice of delta functions. The displacement of the lattice relative to the pattern is random and obeys a uniform probability density function defined over a unit cell of the lattice. Random-phase sampling affects the edge-pixels...

Arbitrary Pattern formation (APF) by a swarm of mobile robots is widely studied problem in the literature. Many works regarding APF have been proposed on plane and infinite grid point robots. But practical application, it impossible to design In Bose et al. [Arbitrary pattern asynchronous oblivious Theor Comput Sci. 2020;815:213–227], are assumed opaque fat but environment plane. To best our kn...