Neural networks have been reported to be succesful in all kinds of pattern recognition and image processing applications. In this paper a neural network is proposed to solve the problem of spot counting in bio-imaging. Currently we have a microscope system coupled to a computer which performs the image acquisition and classiication task. Neural networks ooer a exibility which might be used to b...

This paper introduces a novel method for the quality evaluation of resistance spot welds. The evaluation is based on computer vision methods, which allow nondestructive on-line real-time processing. The input of the system is the image of a weld imprint on a metal band which covers the electrodes against wear and soiling. In order to find the position of the resistance spot welds, we describe a...

A chimera state is a spatiotemporal pattern in which a network of identical coupled oscillators exhibits coexisting regions of asynchronous and synchronous oscillation. Two distinct classes of chimera states have been shown to exist: "spots" and "spirals." Here we study coupled oscillators on the surface of a sphere, a single system in which both spot and spiral chimera states appear. We presen...

BACKGROUND Neonatal adrenoleucodystrophy (NALD) is a rare disorder resulting from abnormal peroxisomal biogenesis. Affected patients present in infancy with developmental delay, hypotonia, and seizures. Blindness and nystagmus are prominent features. The authors suggest a characteristic leopard spot pigmentary pattern in the peripheral retina to be diagnostic. METHODS Three patients are repor...

We present a Shack-Hartmann (SH) centroid detection algorithm capable to measure in presence of strong noise, background illumination and spot modulating signals, which are typical limiting factors of traditional centroid detection algorithms. The proposed method is based on performing a normalization of the SH pattern using the spiral phase transform method and Fourier filtering. The spot cent...

Cells in intermediate and deeper layers of the pigeon optic tectum respond best when a textured background pattern is moved in the opposite direction to a moving test spot. Complete inhibition occurs when the background moves in the same direction as the test stimulus. Most noteworthy is the invariance of this relationship over a wide range of test spot directions. These cells represent a highe...

In embryogenesis, structural patterns, such as vascular branching, may form via a reaction-diffusion mechanism in which activator and inhibitor morphogens guide cells into periodic aggregates. We previously found that vascular mesenchymal cells (VMCs) spontaneously aggregate into nodular structures and that morphogen pairs regulate the aggregation into patterns of spots and stripes. To test the...

In natural gas markets, demand exhibits low price elasticity, while supply follows the market price; a phenomenon typically observed in markets for indispensable goods. A significant portion of gas consumption is due to heating and increasingly power generation, which sets a typical demand pattern: high in winter and summer ('high' seasons) and low in shoulder months ('low' seasons). Thus, the ...

We can have a new perspective about customer by analyzing customer shopping path data because customer should go to a specific place to buy some product in store. The analysis of path data is time-consuming work. In this way, the commonly used method is clustering algorithm in order to understand the tendency of data. But a general clustering algorithm is not suitable to identify the shopping p...