358 research outputs found
Visualization of Active Faulting using 3-D GPR Data Recorded Across the Alpine Fault, New Zealand
Three-dimensional (3-D) GPR data were acquired
across braided river sediments cut by the Alpine Fault at Calf
Paddock, New Zealand. We used 100 MHz antennas to obtain
images of the subsurface to a depth of 15 m. Cross-sections and
depth-converted time slices selected from the migrated data volume
show both the structural contrast generated by recent offsets
of the fault and the variable orientation of the dipping structures
within the braided river deposits. A trace-correlation technique is
used to generate dip and dip-direction attribute maps that allow us
to visualize the 3-D orientation of the dipping structures. The
attribute maps reveal at least 3 different reflection patterns and the
presence of minor faulting away from the main fault. A correlation-
based migration technique applied to a 2-D GPR profile resulted
in the successful identification of the main fault and subsidiary
faults at distances up to 50 m from the main fault
Estimation of Attendance at a Large Outdoor Event
Accurately estimating program attendance in large, undefined areas is difficult. Yet attendance is an important factor in effective impact assessment and accountability reporting. A simple method, consisting of a combined activity count and exit poll, can be used to produce reasonable results with a measurable assurance of accuracy. A case study application of this method at a major university campus horticulture event is included to summarize the method
GHOSTS I: A New Faint very Isolated Dwarf Galaxy at D = 12 +/- 2 Mpc
We report the discovery of a new faint dwarf galaxy, GHOSTS I, using HST/ACS
data from one of our GHOSTS (Galaxy Halos, Outer disks, Substructure, Thick
disk, and Star clusters) fields. Its detected individual stars populate an
approximately one magnitude range of its luminosity function (LF). Using
synthetic color-magnitude diagrams (CMDs) to compare with the galaxy's CMD, we
find that the colors and magnitudes of GHOSTS I's individual stars are most
consistent with being young helium-burning and asymptotic giant branch stars at
a distance of 12 +/- 2 Mpc. Morphologically, GHOSTS I appears to be actively
forming stars, so we tentatively classify it as a dwarf irregular (dIrr)
galaxy, although future HST observations deep enough to resolve a larger
magnitude range in its LF are required to make a more secure classification.
GHOSTS I's absolute magnitude is , making it one
of the least luminous dIrr galaxies known, and its metallicity is lower than
[Fe/H] =-1.5 dex. The half-light radius of GHOSTS I is 226 +/- 38 pc and its
ellipticity is 0.47 +/- 0.07, similar to Milky Way and M31 dwarf satellites at
comparable luminosity. There are no luminous massive galaxies or galaxy
clusters within ~ 4 Mpc from GHOSTS I that could be considered as its host,
making it a very isolated dwarf galaxy in the Local Universe.Comment: 8 pages, 7 figures. Accepted for publication in Ap
A 16S rRNA gene and draft genome database for the murine oral bacterial community
A curated murine oral microbiome database to be used as a reference for mouse-based studies has been constructed using a combination of bacterial culture, 16S rRNA gene amplicon, and whole-genome sequencing. The database comprises a collection of nearly full-length 16S rRNA gene sequences from cultured isolates and draft genomes from representative taxa collected from a range of sources, including specific-pathogen-free laboratory mice, wild Mus musculus domesticus mice, and formerly wild wood mouse Apodemus sylvaticus. At present, it comprises 103 mouse oral taxa (MOT) spanning four phyla—Firmicutes, Proteobacteria, Actinobacteria, and Bacteroidetes—including 12 novel undescribed species-level taxa. The key observations from this study are (i) the low diversity and predominantly culturable nature of the laboratory mouse oral microbiome and (ii) the identification of three major murine-specific oral bacterial lineages, namely, Streptococcus danieliae (MOT10), Lactobacillus murinus (MOT93), and Gemella species 2 (MOT43), which is one of the novel, still-unnamed taxa. Of these, S. danieliae is of particular interest, since it is a major component of the oral microbiome from all strains of healthy and periodontally diseased laboratory mice, as well as being present in wild mice. It is expected that this well-characterized database should be a useful resource for in vitro experimentation and mouse model studies in the field of oral microbiology
Ursinus College Alumni Journal, Summer 1946
Board of Directors encourage alumni participation • Alumni committees active • Dr. Johnson commencement speaker • President\u27s page • Directors plan for future • Alumni give $31,000 • Retirement plan • Five earn degrees • Missions secretary • Modern pioneer • Operations Africa • A Dean\u27s mailbox • That others may live • Dr. Miller retires • Seminary gets new head • Faculty and staff additions • Penfield winner • Dr. Garrett studies in France • News about ourselves • Commencement prizes • Challenge of Picalqui • Highlights in fall sports • Local Alumni Association meetings • News around town • Necrology • Summer conferences • College solves housing problem • Fall enrollment 700 • Alumni Association officershttps://digitalcommons.ursinus.edu/alumnijournal/1028/thumbnail.jp
Международные аспекты правового регулирования труда работников, занятых на работах с вредными и опасными условиями труда
В статье изучены особенности правового регулирования труда работников, занятых во вредных и опасных условиях труда, а также рассмотрено соответствие законодательства в сфере охраны труда международным стандартам
Outer-Disk Populations in NGC 7793: Evidence for Stellar Radial Migration
We analyzed the radial surface brightness profile of the spiral galaxy NGC
7793 using HST/ACS images from the GHOSTS survey and a new HST/WFC3 image
across the disk break. We used the photometry of resolved stars to select
distinct populations covering a wide range of stellar ages. We found breaks in
the radial profiles of all stellar populations at 280" (~5.1 kpc). Beyond this
disk break, the profiles become steeper for younger populations. This same
trend is seen in numerical simulations where the outer disk is formed almost
entirely by radial migration. We also found that the older stars of NGC 7793
extend significantly farther than the underlying HI disk. They are thus
unlikely to have formed entirely at their current radii, unless the gas disk
was substantially larger in the past. These observations thus provide evidence
for substantial stellar radial migration in late-type disks.Comment: 8 pages, 6 figure. Accepted for publication in Ap
Recommended from our members
Global diversity of the Brachypodium species complex as a resource for genome-wide association studies demonstrated for agronomic traits in response to climate
The development of model systems requires a detailed assessment of standing genetic variation across natural populations. The Brachypodium species complex has been promoted as a plant model for grass genomics with translation to small grain and biomass crops. To capture the genetic diversity within this species complex, thousands of Brachypodium accessions from around the globe were collected and genotyped by sequencing. Overall, 1897 samples were classified into two diploid or allopolyploid species, and then further grouped into distinct inbred genotypes. A core set of diverse B. distachyon diploid lines was selected for whole genome sequencing and high resolution phenotyping. Genome-wide association studies across simulated seasonal environments was used to identify candidate genes and pathways tied to key life history and agronomic traits under current and future climatic conditions. A total of 8, 22, and 47 QTL were identified for flowering time, early vigor, and energy traits, respectively. The results highlight the genomic structure of the Brachypodium species complex, and the diploid lines provided a resource that allows complex trait dissection within this grass model species.We are grateful for
funding and support from the Australian Research Council
Centre of Excellence in Plant Energy Biology (CE140100008).
Australian Plant Phenomics Facility is supported under the
National Collaborative Research Infrastructure Strategy of the
Australian Government. The research was undertaken with
the assistance of resources from the National Computational
Infrastructure (NCI), which is supported by the Australian
Government
- …