317 research outputs found
A commentary on Jeremiah: exile and homecoming
Brueggemann, Walter. A commentary on Jeremiah: exile and homecoming. Grand Rapids: Eerdmans, 1998
The Gospel of John in the light of the Old Testament
Westermann, Claus. The Gospel of John in the light of the Old Testament. Peabody, Mass: Hendrickson, 1998
Star formation in the nearby universe: the ultraviolet and infrared points of view
This work presents the main ultraviolet (UV) and far-infrared (FIR)
properties of two samples of nearby galaxies selected from the GALEX (\AA, hereafter NUV) and IRAS (m) surveys respectively.
They are built in order to get detection at both wavelengths for most of the
galaxies. Star formation rate (SFR) estimators based on the UV and FIR
emissions are compared. Systematic differences are found between the SFR
estimators for individual galaxies based on the NUV fluxes corrected for dust
attenuation and on the total IR luminosity. A combined estimator based on NUV
and IR luminosities seems to be the best proxy over the whole range of values
of SFR. Although both samples present similar average values of the birthrate
parameter b, their star-formation-related properties are substantially
different: NUV-selected galaxies tend to show larger values of for lower
masses, SFRs and dust attenuations, supporting previous scenarios for the star
formation history (SFH). Conversely, about 20% of the FIR-selected galaxies
show high values of , SFR and NUV attenuation. These galaxies, most of them
being LIRGs and ULIRGs, break down the downsizing picture for the SFH, however
their relative contribution per unit volume is small in the local Universe.
Finally, the cosmic SFR density of the local Universe is estimated in a
consistent way from the NUV and IR luminosities.Comment: 43 pages, 13 figures, accepted for publication in Astrophysical
Journal Supplement Serie
The On-Orbit Performance of the Galaxy Evolution Explorer
We report the first year on-orbit performance results for the Galaxy
Evolution Explorer (GALEX), a NASA Small Explorer that is performing a survey
of the sky in two ultraviolet bands. The instrument comprises a 50 cm diameter
modified Ritchey-Chretien telescope with a 1.25 degree field of view,
selectable imaging and objective grism spectroscopic modes, and an innovative
optical system with a thin-film multilayer dichroic beam splitter that enables
simultaneous imaging by a pair of photon counting, microchannel plate, delay
line readout detectors. Initial measurements demonstrate that GALEX is
performing well, meeting its requirements for resolution, efficiency,
astrometry, bandpass definition and survey sensitivity.Comment: This paper will be published as part of the Galaxy Evolution Explorer
(GALEX) Astrophysical Journal Letters Special Issu
The GALEX-VVDS Measurement of the Evolution of the 1500A Luminosity Function
We present the first measurement of the galaxy luminosity function at 1500A
between 0.2<z<1.2 based on GALEX-VVDS observations (1000 spectroscopic
redshifts for galaxies with NUV<24.5) and at higher z using existing datasets.
Our main results are summarized as follows :
(i) luminosity evolution is observed with Delta(Mstar)=-2.0 mag between z=0
and z=1 and Delta(Mstar)=-1.0mag between z=1 and z=3. This confirms that the
star formation activity was significantly higher in the past.
(ii) the LF slopes vary between -1.2< alpha <-1.65, with a marginally
significant hint of increase at higher z.
(iii) we split the sample in three restframe (B-I) intervals providing an
approximate spectral type classification: Sb-Sd, Sd-Irr and unobscured
starbursts. We find that the bluest class evolves less strongly in luminosity
than the two other classes. On the other hand their number density increases
sharply with z (15% in the local universe to 55% at z=1) while that of the
reddest classes decreases.Comment: 4 pages, 4 figures. This paper will be published as part of the
Galaxy Evolution Explorer (GALEX) Astrophysical Journal Letters Special
Issue.Links to the full set of papers will be available at :
http://www.galex.caltech.edu/PUBLICATIONS/ after November 22, 200
CMS physics technical design report : Addendum on high density QCD with heavy ions
Peer reviewe
The RESET project: constructing a European tephra lattice for refined synchronisation of environmental and archaeological events during the last c. 100 ka
This paper introduces the aims and scope of the RESET project (. RESponse of humans to abrupt Environmental Transitions), a programme of research funded by the Natural Environment Research Council (UK) between 2008 and 2013; it also provides the context and rationale for papers included in a special volume of Quaternary Science Reviews that report some of the project's findings. RESET examined the chronological and correlation methods employed to establish causal links between the timing of abrupt environmental transitions (AETs) on the one hand, and of human dispersal and development on the other, with a focus on the Middle and Upper Palaeolithic periods. The period of interest is the Last Glacial cycle and the early Holocene (c. 100-8 ka), during which time a number of pronounced AETs occurred. A long-running topic of debate is the degree to which human history in Europe and the Mediterranean region during the Palaeolithic was shaped by these AETs, but this has proved difficult to assess because of poor dating control. In an attempt to move the science forward, RESET examined the potential that tephra isochrons, and in particular non-visible ash layers (cryptotephras), might offer for synchronising palaeo-records with a greater degree of finesse. New tephrostratigraphical data generated by the project augment previously-established tephra frameworks for the region, and underpin a more evolved tephra 'lattice' that links palaeo-records between Greenland, the European mainland, sub-marine sequences in the Mediterranean and North Africa. The paper also outlines the significance of other contributions to this special volume: collectively, these illustrate how the lattice was constructed, how it links with cognate tephra research in Europe and elsewhere, and how the evidence of tephra isochrons is beginning to challenge long-held views about the impacts of environmental change on humans during the Palaeolithic. © 2015 Elsevier Ltd.RESET was funded through Consortium Grants awarded by the Natural Environment Research Council, UK, to a collaborating team drawn from four institutions: Royal Holloway University of London (grant reference NE/E015905/1), the Natural History Museum, London (NE/E015913/1), Oxford University (NE/E015670/1) and the University of Southampton, including the National Oceanography Centre (NE/01531X/1). The authors also wish to record their deep gratitude to four members of the scientific community who formed a consultative advisory panel during the lifetime of the RESET project: Professor Barbara Wohlfarth (Stockholm University), Professor Jørgen Peder Steffensen (Niels Bohr Institute, Copenhagen), Dr. Martin Street (Romisch-Germanisches Zentralmuseum, Neuwied) and Professor Clive Oppenheimer (Cambridge University). They provided excellent advice at key stages of the work, which we greatly valued. We also thank Jenny Kynaston (Geography Department, Royal Holloway) for construction of several of the figures in this paper, and Debbie Barrett (Elsevier) and Colin Murray Wallace (Editor-in-Chief, QSR) for their considerable assistance in the production of this special volume.Peer Reviewe
Applicability of T1-weighted MRI in the assessment of forensic age based on the epiphyseal closure of the humeral head
This work investigates the value of magnetic resonance imaging analysis of proximal epiphyseal fusion in research examining the growth and development of the humerus and its potential utility in establishing forensic age estimation. In this study, 428 proximal humeral epiphyses (patient age, 12-30years) were evaluated with T1-weighted turbo spin echo (T1 TSE) sequences in coronal oblique orientation on shoulder MRI images. A scoring system was created following a combination of the Schmeling and Kellinghaus methods. Spearman's rank correlation analysis revealed a significant positive relationship between age and ossification stage of the proximal humeral epiphysis (all subjects: rho=0.664, p<0.001; males: 0.631, p<0.001; females: rho=0.651, p<0.001). The intra- and inter-observer reliability assessed using Cohen's kappa statistic was =0.898 and =0.828, respectively. The earliest age of epiphysis closure was 17years for females and 18years for males. MRI of the proximal humeral epiphysis can be considered advantageous for forensic age estimation of living individuals in a variety of situations, ranging from monitoring public health to estimating the age of illegal immigrants/asylum seekers, minors engaged in criminal activities, and illegal participants in competitive sports, without the danger of radiation exposure
The Galex Ultraviolet Variability (GUVV) Catalog
We present Version 1.0 of the NASA Galaxy Evolution Explorer (GALEX)
ultraviolet variability catalog (GUVV) that contains information on 84
time-variable and transient sources gained with simultaneous near and far
ultraviolet photometric observations. These time-variable sources were
serendipitously revealed in the various 1.2 degree star fields currently being
surveyed by the GALEX satellite in two ultraviolet bands (NUV 1750-2750A, FUV
1350-1750A) with limiting AB magnitudes of 23-25. The largest-amplitude
variable objects presently detected by GALEX are M-dwarf flare stars, which can
brighten by 5-10 mag in both the NUV and FUV bands during short duration (<
500s) outbursts. Other types of large-amplitude ultraviolet variable objects
include ab-type RR Lyrae stars, which can vary periodically by 2-5mag in the
GALEX FUV band. This first GUVV catalog lists galactic positions and possible
source identifications in order to provide the astronomical community with a
list of time-variable objects that can now be repeatedly observed at other
wavelengths. We expect the total number of time-variable source detections to
increase as the GALEX mission progresses, such that later version numbers of
the GUVV catalog will contain substantially more variable sources
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