We present a model for the radio outbursts of microquasars based on the assumption of quasi-continuous jet ejection. The jets are ‘lit up’ by shock fronts traveling along the jets during outbursts. The shocks accelerate relativistic particles which emit the observed synchrotron radiation. The observed comparatively flat decay light curves combined with gradually steepening spectral slopes are e...

In the following we will discuss a cost effective immersive gaming environment and the implementation in Blender [1], an open source game engine. This extends traditional approaches to immersive gaming which tend to concentrate on multiple flat screens, sometimes surrounding the player, or cylindrical [2] displays. In the former there are unnatural gaps between each display due to screen framin...

Tongyu County in Northeast China is highly prone to land degradation due to its fragile physical settings characterized by a flat topography, a semi-arid climate, and a shallow groundwater table. This study aims to determine the causes of land degradation through detecting the long-term trend of land cover changes. Degraded lands were mapped from satellite images recorded in 1992 and 2002. Thes...

A preliminary comparison between the Land Surface Temperature (LST) product generated by the LSA SAF and ground measurements carried out in an extensive, flat, unstressed, fully-covering rice field site showed an LST error larger than ±2K. Since then, several issues have been investigated with the aim of reducing error sources in the retrieval of LST from MSG-SEVIRI in Eastern Spain: a) a metho...

Whereas the Gerlits-Nagy γ property is strictly weaker than the Galvin-Miller strong γ property, the corresponding strong notions for the Menger, Hurewicz, Rothberger, Gerlits-Nagy (∗), Arkhangel’skǐi and Sakai properties are equivalent to the original ones. We give new game theoretic characterizations for most of these properties, solve a related problem of Kočinac and Scheepers, and answer a ...

Given an embedded cylinder in an arbitrary surface, we give a gauge theoretic definition of the associated Goldman flow, which is a circle action on a dense open subset of the moduli space of equivalence classes of flat SU(2)-connections over the surface. A cylinder in a compact nonorientable surface lifts to two cylinders in the orientable double cover, and the composite flow is the compositio...

This paper proposes a multiple layer combinations reversible watermarking scheme. We use a combination of predictors for calculating the new value of central pixel, as you can see in this paper we use a circular predictor, a cross one and also a square predictor, taking in consideration all the possibilities to mark the pixels. Also, an advantage of our method is the one of splitting the image ...

A dicycle cover of a digraphD is a familyF of dicycles ofD such that each arc ofD lies in at least one dicycle inF. We investigate the problem of determining the upper bounds for the minimum number of dicycles which cover all arcs in a strong digraph. Best possible upper bounds of dicycle covers are obtained in a number of classes of digraphs including strong tournaments, Hamiltonian oriented g...

We assessed the effectiveness of very high spatial resolution IKONOS imagery for mapping a top invasive woody plant, Pittosporum undulatum, in a Protected Area in S.Miguel Island. We developed a segmentation-based classification scheme. A strong separability between most important land cover classes and a high accuracy in supervised classification maps was achieved. Overall separability improve...