The aim of this paper is to give a precise estimate on the tail probability of the visibility function in a germ-grain model: this function is defined as the length of the longest ray starting at the origin that does not intersect an obstacle in a Boolean model. We proceed in two or more dimensions using coverage techniques. Moreover, convergence results involving a type I extreme value distrib...

Direct volume rendering allows for interactive exploration of volumetric data and has become an important tool in many visualization domains. But the insight and information that can be obtained are dependent on the transfer function defining the transparency of voxels. Constructing good transfer functions is one of the most time consuming and cumbersome tasks in volume visualization. We presen...

1. A test is proposed of the hypothesis that visual purple is the photosensitive substance concerned in dim vision. It is based on the fact that fish visual purple is different from that of other vertebrates. If the hypothesis is correct, the fish dim-visibility function should be different from that of other vertebrates and should be determined by the absorption spectrum of its visual purple. ...

We extend results of [1, 2, 3] on the visibility problem for lattice points in Zd to the case of function fields over finite fields which are related to important questions regarding the corresponding q-Jacobsthal function. Résumé. Nous étendons résultats de [1, 2, 3] sur le probleme de la visibilité des points du réseau entier Zd au cas des corps de fonctions sur un corps fini, en rapport avec...

Object-oriented languages with multiple dispatch and multiple inheritance provide rich expressiveness but statically and modularly checking programs in such languages to guarantee that no ambiguous calls can occur at run time has been a difficult problem. We present a core calculus for Fortress, which provides various language features—notably functional methods and components— and solves the p...

A two -dimensional non-observable square array illuminator using four polarized beams from two interferometers in tandem is reported. The array pattern could be scanned over large longitudinal distances without loss of distortion. Fringe visibility of interferograms has been studied as a function of polarization of the interfering beams. The expressions for the array patterns and the fringe vis...

Low visibility on expressways caused by heavy fog and haze is a main reason for traffic accidents. Real-time estimation of atmospheric visibility is an effective way to reduce traffic accident rates. With the development of computer technology, estimating atmospheric visibility via computer vision becomes a research focus. However, the estimation accuracy should be enhanced since fog and haze a...

atmospheric visibility is a key factor in everyday life mainly in aviation, industry and surface traffic. it has been defined as the greatest distance at which an observer can just see a black object viewed against the horizon sky which is known as the visual range. furthermore, light extinction which is mostly due to absorption and scattering effects of aerosols in the atmosphere, can be calcu...

Following the tragedy of another shooting that happened in a visibly Queer space, this study explores how Queerness rural spaces generates spectrum visibility. Men Place (2019) by Miriam Abelson and Out Country: Youth Media Visibility Rural America (2009) Mary Gray, personal narratives/podcasts cultivated Country Queers, “place histories” such as Brandon Teena Matthew Shepard which were highly ...