Honeybees are known for their ability to use the sun's azimuth and the sky's polarization pattern for spatial orientation. Sky compass orientation in bees has been extensively studied at the behavioral level but our knowledge about the underlying neuronal systems and mechanisms is very limited. Electrophysiological studies in other insect species suggest that neurons of the sky compass system i...

We introduce the properties of the Two Micron All-Sky Survey (2MASS) survey for IAU Symposium 204. 2MASS is a near-infrared survey of the entire sky characterized by high reliability and completeness. Catalogs and images for 47% of the sky are now available online. This data release has been used by Wright (2000) and Cambrésy et al. (2000) to subtract the stellar foreground at 1.25 and 2.2 micr...

A long-standing assumption about the clear sky is that its colors and luminances are distributed symmetrically about the principal plane. As useful as this approximation is, our digital-image analyses show that clear-sky color and luminance routinely depart perceptibly from exact symmetry. These analyses reconfirm our earlier measurements with narrow field-of-view spectroradiometers [J. Opt. So...

The capabilities ofmeasuring the sky background both on-board of GAIA and on-ground are discussed in relation to astrometric and photometric scientific requirements, and to onboard computing specifications. From the various ways of estimating the sky background during the data reduction it is shown that AF11 would be the more adapted, either using its edges or by LSF-fitting. A more computation...

1. The Problem I begin with a gloomy observation on monastic education by Phra Prayud Payutto (1939) of Thailan whom Tambiah calls "a brilliant scholar-monk" [1]. Payutto said in 1984: "The present state of m education is similar to a sky which has some spots of sunshine, but is in fact full of cloud. The sky is n clear. When monks themselves see the dull and overcast sky they may feel disheart...

The original Shortwave Flux Analysis (SWFA), based on Long and Ackerman (2000) and Long et al. (1999), deals only with daylight shortwave (SW) data. The SWFA algorithm produces continuous estimates of clear-sky downwelling diffuse, direct, and total SW; estimated fractional sky cover; and identification of when the sky was cloudless. This algorithm package is being produced as an Atmospheric Ra...

During 5 years of operation COMPTEL has collected data covering the entire sky, with exposures ranging from weeks to months. Full sky maps have already been published using data from the rst 3 years of the mission; the additional information now a v ail-able represent a signiicant addition to the COMP-TEL data base and allows us to consolidate previous results. We present the most recent whole-...

The Sky Polarization Observatory is an experiment selected by ESA for the Early Opportunity Phase onboard the International Space Station. SPOrt is the first payload specifically designed for polarization measurements, it will provide near full sky maps of the sky polarized emission at four microwave frequencies between 22 and 90 GHz. Current design of SPOrt will be presented, together with an ...

In this paper, an overview of the NEWSKY project is given. This project is funded by the European Commission within the 6th framework program and will start in January 2007. The NEWSKY project is a feasibility study to clarify if it is possible to establish a heterogeneous network for aeronautical communications which is capable to integrate different communications systems as well as different...

Published: 13/10/2010 Received: 02/02/2010 ecancer 2010, 4:181 DOI: 10.3332/ecancer.2010.181 Copyright: © the authors; licensee ecancermedicalscience. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the origin...