3,732 research outputs found
Think Different: Applying the Old Macintosh Mantra to the Computability of the SUSY Auxiliary Field Problem
Starting with valise supermultiplets obtained from 0-branes plus field
redefinitions, valise adinkra networks, and the "Garden Algebra," we discuss an
architecture for algorithms that (starting from on-shell theories and, through
a well-defined computation procedure), search for off-shell completions. We
show in one dimension how to directly attack the notorious "off-shell auxiliary
field" problem of supersymmetry with algorithms in the adinkra network-world
formulation.Comment: 28 pages, 1 figur
An exploration of occupation in nursing home residents with dementia
Objectives: This study evaluated the sitting room environment of two nursing homes
in Ireland, using interactive occupation and social engagement as outcome measures
and defining these rooms as occupational spaces.
Method: Snapshot observational recordings were made in the main sitting rooms
during the periods of time when the rooms were in most active use. Narrative
information was also recorded.
Results: Residents were more likely to occupy their time in the main sitting room
passively, rather than in interactive occupation and social engagement. The nursing
home residents with dementia spent approximately 70% of their daily time in the
main sitting room areas in states of occupational disengagement.
Discussion: Additional insight is provided through pragmatic narrative descriptions
of the functioning of the main sitting room environment in terms of interactive
occupation and social engagement.
Relevance: The research study demonstrates a methodology for evaluating the
sitting room areas of a care environment, using interactive occupation and social
engagement as outcome measures,which can be used for descriptive and comparative
insights into the performance of care environments
Nanosecond-scale timing jitter in transition edge sensors at telecom and visible wavelengths
Transition edge sensors (TES) have the highest reported efficiencies (>98%)
for detection of single photons in the visible and near infrared. Experiments
in quantum information and foundations of physics that rely critically on this
efficiency have started incorporating these detectors into con- ventional
quantum optics setups. However, their range of applicability has been hindered
by slow operation both in recovery time and timing jitter. We show here how a
conventional tungsten-TES can be operated with jitter times of < 4 ns, well
within the timing resolution necessary for MHz clocking of experiments, and
providing an important practical simplification for experiments that rely on
the simultaneous closing of both efficiency and locality loopholes
Generation of Optical Coherent State Superpositions by Number-Resolved Photon Subtraction from Squeezed Vacuum
We have created heralded coherent state superpositions (CSS), by subtracting
up to three photons from a pulse of squeezed vacuum light. To produce such CSSs
at a sufficient rate, we used our high-efficiency photon-number-resolving
transition edge sensor to detect the subtracted photons. This is the first
experiment enabled by and utilizing the full photon-number-resolving
capabilities of this detector. The CSS produced by three-photon subtraction had
a mean photon number of 2.75 -0.24/+0.06 and a fidelity of 0.59 -0.14/+0.04
with an ideal CSS. This confirms that subtracting more photons results in
higher-amplitude CSSs.Comment: Main manuscript and supplementary materia
HAT-P-56b: An inflated massive Hot Jupiter transiting a bright F star followed up with K2 Campaign 0 observations
We report the discovery of HAT-P-56b by the HATNet survey, an inflated hot
Jupiter transiting a bright F type star in Field 0 of NASA's K2 mission. We
combine ground-based discovery and follow-up light curves with high precision
photometry from K2, as well as ground-based radial velocities from TRES on the
FLWO 1.5m telescope to determine the physical properties of this system.
HAT-P-56b has a mass of , radius of , and transits its host
star on a near-grazing orbit with a period of 2.7908 d. The radius of HAT-P-56b
is among the largest known for a planet with . The host star has a
V-band magnitude of 10.9, mass of 1.30 , and radius of 1.43 .
The periodogram of the K2 light curve suggests the star is a Dor
variable. HAT-P-56b is an example of a ground-based discovery of a transiting
planet, where space-based observations greatly improve the confidence in the
confirmation of its planetary nature, and also improve the accuracy of the
planetary parameters.Comment: 13 pages, 11 figures, accepted by A
Influence of Translocations on Eastern Wild Turkey Population Genetics in Texas
Between 1979 and 2006, over 7,000 eastern wild turkeys (Meleagris gallopavo silvestris) from 16 states were translocated to east Texas in an attempt to restore a stable, huntable population. Although current populations are stable in some areas and a spring male-only hunting season was opened in 1995, turkey density in the region remains low and large areas of apparently suitable habitat are not occupied. The longterm effects of the extensive translocations and current levels of connectivity among various populations are unknown. We used microsatellite DNA analysis to assess the influence of translocations on current genetic structure and gene flow in eastern wild turkeys. The influence of translocations was clearly evident and reflected historical contributions from the Midwest and southeastern United States. The east Texas population consisted of 3 distinct genetic clusters. Despite a lack of clear geographic barriers and nearly contiguous forest cover in much of the east Texas landscape, regional gene flow among clusters appeared to be limited. Diversity in the regional population remains high, but we recommend that regulations reflect the current population structure and that long-term efforts should be made to increase connectivity among wild turkeys in the region
Using GIS-Based, Regional Extent Habitat Suitability Modeling to Identify Conservation Priority Areas: A Case Study of the Louisiana Black Bear in East Texas
State and federal recovery plans mandate that priority areas for future population expansion be identified within the historical range of the Louisiana black bear (Ursus americanus luteolus). Despite the presence of potentially suitable habitat in east Texas and expanding populations in adjacent states, quantitative estimates of regional habitat suitability do not exist. We developed a regional extent habitat suitability index (HSI) model in a geographic information system (GIS) to evaluate year-round habitat requirements for black bears in the 43,530-km2 south black bear recovery zone in southeastern Texas. We measured hard and soft mast production, understory vegetation density, and tree den availability at 516 survey points in 38 habitat classes (82% of the total area in the south recovery zone). We developed geospatial models for summer food availability; fall food availability, diversity, and productivity; protection cover, tree den availability, distance to roads, and human development zones and calculated HSI scores per pixel in a continuous dataset. Habitat suitability scores ranged from 0.00 to 0.76 throughout southeastern Texas. Highly (20,700 ha (mean HSI=0.5) capable of sustaining viable black bear populations. These units ranged from 62,844 ha to 124,808 ha in size and suitable habitat pixels within units ranged from 0.58 to 0.60 in mean HSI scores. Recovery unit scores were comparable to those previously reported for occupied bear range in the southeastern United States and acreages of suitable habitat exceeded those estimated to support existing Louisiana black bear populations
NLTT 41135: a field M-dwarf + brown dwarf eclipsing binary in a triple system, discovered by the MEarth observatory
We report the discovery of an eclipsing companion to NLTT 41135, a nearby M5
dwarf that was already known to have a wider, slightly more massive common
proper motion companion, NLTT 41136, at 2.4 arcsec separation. Analysis of
combined-light and radial velocity curves of the system indicates that NLTT
41135B is a 31-34 +/- 3 MJup brown dwarf (where the range depends on the
unknown metallicity of the host star) on a circular orbit. The visual M-dwarf
pair appears to be physically bound, so the system forms a hierarchical triple,
with masses approximately in the ratio 8:6:1. The eclipses are grazing,
preventing an unambiguous measurement of the secondary radius, but follow-up
observations of the secondary eclipse (e.g. with the James Webb Space
Telescope) could permit measurements of the surface brightness ratio between
the two objects, and thus place constraints on models of brown dwarfs.Comment: 15 pages, 6 figures, 10 tables, emulateapj format. Accepted for
publication in Ap
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