منابع مشابه
Issn 1730-413x
QuickBird satellite images were processed using object-based analysis to map the spatial structure of seagrass in sandy shoal habitat in the southern Baltic Sea. A three-level ecological model of seagrass landscape, composed of meadows, beds and patches/gaps, was implemented in the multi-scale object domain. Image segmentation was performed at different spatial scales. In order to determine rep...
متن کاملIssn 1730-413x
Nutrients, pH, and organic matter were determined in water samples collected from the Raba River above Dobczyce Reservoir (meso-eutrophic), from the Dunajec River above Czorsztyn Reservoir (mesotrophic), and Rożnów Reservoir (eutrophic), and in the bottom sediments of the reservoirs. The river waters were alkaline (pH 7.2–9.2). In the Raba River and Dunajec River, the ranges of nutrients and or...
متن کاملIssn 1730-413x
During investigations of an inundated opencast sulphur mine (an open, deep water habitat with a relatively small littoral area) only five species of breeding water birds were recorded. The density of breeding great crested grebes Podiceps cristatus was relatively high (c. 1.0-1.1 pairs 10 ha of water, and 1.6-1.8 pairs ha of the macrophyte area) although fish density was very low. High water tr...
متن کاملIdentification of a Likely Radio Counterpart to the Rapid Burster
We have identiÐed a likely radio counterpart to the low-mass X-ray binary MXB 1730[335 (the Rapid Burster). The counterpart has shown 8.4 GHz radio on/o† behavior correlated with the X-ray on/o† behavior as observed by the RXT E/ASM during six VLA observations. The probability of an unrelated, randomly varying background source duplicating this behavior is 1%È3% depending on the correlation tim...
متن کاملDiscovery of Hard X-ray Emission from Type Ii Bursts of the Rapid Burster
We report on results of BeppoSAX Target Of Opportunity (TOO) observations of the source MXB 1730-335, also called the Rapid Burster (RB), made during its outburst of February–March 1998. We monitored the evolution of the spectral properties of the RB from the outburst decay to quiescence. During the first TOO, the X–ray light curve of the RB showed many Type II bursts and its broadband (1-100 k...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1978
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/184.1.1p