نتایج جستجو برای: cib
تعداد نتایج: 347 فیلتر نتایج به سال:
This is one of two papers in which we report the detection of structure in the cosmic infrared background (CIB) between 1.25 2.2 μm through the use of data from the Two Micron Sky Survey (2MASS). This paper concentrates on data assembly, analysis and the estimate of the various foreground contributions; the companion paper (Kashlinsky, Odenwald, Mather, Skrutskie, Cutri 2002, hereafter KOMSC) p...
We directly measure redshift evolution in the mean physical properties (far-infrared luminosity, temperature, and mass) of the galaxies that produce the cosmic infrared background (CIB), using measurements from the Balloon-borne Large Aperture Sub-millimeter Telescope (BLAST), and Spitzer which constrain the CIB emission peak. This sample is known to produce a surface brightness in the BLAST ba...
We have observed four massive galaxy clusters with the SPIRE instrument on the Herschel Space Observatory and measure a deficit of surface brightness within their central region after removing detected sources. We simulate the effects of instrumental sensitivity and resolution, the source population, and the lensing effect of the clusters to estimate the shape and amplitude of the deficit. The ...
We report first results for the cosmic infrared background (CIB) fluctuations at 1.25, 1.65 and 2.17 μm obtained from long exposures constructed from 2MASS standard star fields. We have co-added and analyzed scans from one such field with a total exposure time > 1 hour, and removed sources and other artifacts. The stars and galaxies were clipped out to Ks ≃19 leaving only high-z galaxies (or po...
We report here that the bzd genes for anaerobic benzoate degradation in Azoarcus sp. strain CIB are organized as two transcriptional units, i.e., a benzoate-inducible catabolic operon, bzdNOPQMSTUVWXYZA, and a gene, bzdR, encoding a putative transcriptional regulator. The last gene of the catabolic operon, bzdA, has been expressed in Escherichia coli and encodes the benzoate-coenzyme A (CoA) li...
The constant image brightness (CIB) assumption assumes that the intensities of corresponding points in two images are equal. This assumption is central to much of computer vision. However, surprisingly little work has been performed to support this assumption, despite the fact the many of algorithms are very sensitive to deviations from CIB. An examination of the images contained in the SRI JIS...
In multi-label learning, there are two main challenges: missing labels and class imbalance (CIB). The former assumes that only a partial set of labels are provided for each training instance while other labels are missing. CIB is observed from two perspectives: first, the number of negative labels of each instance is much larger than its positive labels; second, the rate of positive instances (...
This paper provides a detailed description of the data reduction and analysis procedures that have been employed in our previous studies of spatial fluctuation of the cosmic infrared background (CIB) using deep Spitzer IRAC observations. The selfcalibration we apply removes a strong instrumental signal from the fluctuations which would otherwise corrupt our results. The procedures and results f...
Brazed superabrasive tool has been widely used in machining of difficult-to-cut materials to improve the efficiency and quality. However, severe wear associated short service life have be faced for conventional induction brazed (CIB) abrasive tools during processes, owing its weak bonding strength between grains metal-bonded phases. In this case, method ultrasonic vibration–assisted brazing (UV...
The thermal Sunyaev-Zel'dovich (tSZ) effect is the distortion generated in cosmic microwave background (CMB) spectrum by inverse-Compton scattering of CMB photons off free, energetic electrons, primarily located intracluster medium. Cosmic infrared (CIB) from dust emission star-forming galaxies are expected to undergo same process. In this work, we perform first calculation resulting tSZ-like C...
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