39 research outputs found
Capture cross-section measurements for some medium and heavy weight nuclei using a large liquid scintillator
High-Resolution Measurements of Radiative Neutron Capture in âŽâ·Ti, â”â¶Fe, â”âžNi, â¶â°Ni and â¶ÂčNi Between 7 and 200 keV
Some new measurements and renormalization of neutron capture cross section data in the keV energy range
Some New Measurements and Renormalizations of Neutron Capture Cross Section Data in the keV Energy Range. EUR 3679.
A Millimeter Continuum Survey for Massive Protoclusters in the Outer Galaxy
Our search for the earliest stages of massive star formation turned up twelve
massive pre-protocluster candidates plus a few protoclusters. For this search,
we selected 47 FIR-bright IRAS sources in the outer Galaxy. We mapped regions
of several square arcminutes around the IRAS source in the millimeter continuum
in order to find massive cold cloud cores possibly being in a very early stage
of massive star formation. Masses and densities are derived for the 128
molecular cloud cores found in the obtained maps. We present these maps
together with near-infrared, mid-infrared, and radio data collected from the
2MASS, MSX, and NVSS catalogs. Further data from the literature on detections
of high-density tracers, outflows, and masers are added. The multi-wavelength
datasets are used to characterize each observed region. The massive cloud cores
(M>100 M_sun) are placed in a tentative evolutionary sequence depending on
their emission at the investigated wavelengths. Candidates for the youngest
stages of massive star formation are identified by the lack of detections in
the above-mentioned near-infrared, mid-infrared, and radio surveys. Twelve
massive cores prominent in the millimeter continuum fulfill this requirement.
Since neither FIR nor radio emission have been detected from these cloud cores
massive protostars must be very deeply embedded in these cores. Some of these
objects may actually Pre-Proto-cluster cores: an up to now rare object class,
where the initial conditions of massive star formation can be studied.Comment: 74 pages, 46 figures, to appear in ApJS December 2005, v161
Automatic dialogue act recognition with syntactic features
International audienceThis work studies the usefulness of syntactic information in the context of automatic dialogue act recognition in Czech. Several pieces of evidence are presented in this work that support our claim that syntax might bring valuable information for dialogue act recognition. In particular, a parallel is drawn with the related domain of automatic punctuation generation and a set of syntactic features derived from a deep parse tree is further proposed and successfully used in a Czech dialogue act recognition system based on conditional random fields. We finally discuss the possible reasons why so few works have exploited this type of information before and propose future research directions to further progress in this area