Robotic vision has become a very popular field in recent years due to the numerous promising applications it may enhance. However, errors within the cameras and in their perception of their environment can cause applications in robotics to fail. To help correct these internal and external imperfections, stereo camera calibrations are performed. There are currently many accurate methods of camer...

We aimed to evaluate the microbial and inflammatory characteristics associated with Denture Stomatitis (DS) analyzing: l) Levels of salivary cytokines and cultivable C. albicans; 2) DNA-DNA checkerboard on biofilm associated with mucosal tissue-bearing denture surfaces; 3) Serum C-reactive protein (CRP) levels. Thirty-two subjects were enrolled in the study with control (n = 17) and DS types II...

■ ■ In 1987 you started working on the idea of a photonic crystal. What made you consider such a problem? At that time, some papers had appeared suggesting it was possible to suppress spontaneous emission (SE). I think the first paper was by Dan Kleppner, an atomic physicist from MIT, who suggested putting an atom between two metal plates1. However, that covers only 50% of the SE, that is, it s...

Filtering has been a major approach used in the homogenization-based methods for structural topology optimization to suppress the checkerboard pattern and relieve the numerical instabilities. In this paper a bilateral filtering technique originally developed in image processing is presented as an efficient approach to regularizing the topology optimization problem. A nonlinear bilateral filteri...

We study the zero-temperature phase diagram of Ising spin systems in two dimensions in the presence of competing interactions: long-range antiferromagnetic and nearest-neighbor ferromagnetic of strength J . We first introduce the notion of a “corner energy,” which shows, when the antiferromagnetic interaction decays faster than the fourth power of the distance, that a striped state is favored w...

We propose an approach for estimating the error in depth data provided by generic 3D sensors, which are modern devices capable of generating an image (RGB data) and a depth map (distance) or other similar 2.5D structure (e.g. stereo disparity) of the scene. Our approach starts capturing images of a checkerboard pattern devised for the method. Then proceed with the construction of a dense depth ...

Many behavioral paradigms involve temporally overlapping sensory, cognitive, and motor components within a single trial. The complex interplay among these factors makes it desirable to separate the components of the total response without assumptions about shape of the underlying hemodynamic response. We present a method that does this. Four conditions were studied in four subjects to validate ...

Thermodynamic quantities and correlation functions (CFs) of the classical antiferromagnet on the checkerboard lattice are studied for the exactly solvable infinite-component spin-vector model, D → ∞. In contrast to conventional two-dimensional magnets with continuous symmetry showing extended shortrange order at distances smaller than the correlation length, r . ξc ∝ exp(T ∗/T ), correlations i...

Steady-state visual evoked potential (SSVEP) is one of the typical stimulation paradigms of brain-computer interface (BCI). It has become a research approach to improve the performance of human-computer interaction, because of its advantages including multiple objectives, less recording electrodes for electroencephalogram (EEG) signals, and strong anti-interference capacity. Traditional SSVEP u...

We observe that for planar graphs, the geometric duality relation generates both 2-isomorphism and abstract duality. This observation has surprising consequence links, equivalence defined by isomorphisms of checkerboard graphs is same as 2-isomorphisms graphs.