5,077 research outputs found
The Bees of A.L. Mangham Jr. Regional Airport, Nacogdoches, Texas
The United States is home to about 4,000 species of native bees, and many are critically important due to the pollination services they provide (Buchman & Nabhan 1996). Most of these are inconspicuous, solitary bees that nest in the ground. In recent years, a number of bee species have been shown to be in decline (Burkle 2013). Due to these declines, it is important to study and provide habitat for local bee populations.
As a result of periodic mowing, the surroundings of the A.L. Mangham Jr. Regional Airport in Nacogdoches County, Texas provide a grassy, prairie-like habitat that results in a high diversity of wildflowers. This site may contain high bee diversity as well. In order to explore this possibility, a survey of bees at this location was conducted in the late summer and fall of 2016
Rappers’ Rhymes Are Not Admissions to Crimes: Eliminatingthe Unlawful Use of Rap Lyrics against Rappers in CriminalProceedings
The Changing Face of Health Reimbursement Arrangements: Affordable Care Act Implications for HRAs
An Assessment of Uncertainty in Atmospheric State Measurements on Airborne Platforms
Several federal agencies, including NASA, maintain a fleet of highly specialized research aircraft which are routinely used in airborne science field studies. Well characterized measurements of atmospheric state parameters, such as pressure, ambient temperature, and wind speed are paramount in the ability to perform higher level analysis towards complex research questions. Even though measurements have been made over several decades, they remain a challenge given the compressibility of air along the aircraft axis, instrument placement along the aircraft skin, and the potential for probe contamination. Therefore, a set of redundant measurements is often acquired to ensure a complete instrument time series. This uncertainty assessment takes advantage of various inter-comparison techniques devised to diagnose the temporal and spatial fidelity of atmospheric state parameters, often between different instrumentation sources and aircraft assets. To be discussed are the impacts of this ongoing study, current limitations to the airborne probes, and plans for future work
Uncertainty benchmarks for time-dependent transport problems
Uncertainty quantification results are presented for a well known
verification solution, the time dependent transport infinite plane pulse. The
method of polynomial chaos expansions (PCE) is employed for quick and accurate
calculation of the quantities of interest. Also, the method of uncollided
solutions is used in this problem to treat part of the uncertainty calculation
analytically
Generalized Ramsey numbers at the linear and quadratic thresholds
The generalized Ramsey number is the smallest number of colors
needed to color the edges of the complete graph so that every -clique
spans at least colors. Erd\H{o}s and Gy\'arf\'as showed that
grows linearly in when is fixed and . Similarly they showed that is quadratic in when
is fixed and . In this note we
improve on the known estimates for and . Our proofs involve establishing a significant strengthening
of a previously known connection between and another extremal
problem first studied by Brown, Erd\H{o}s and S\'os, as well as building on
some recent progress on this extremal problem by Delcourt and Postle and by
Shangguan. Also, our upper bound on follows from an
application of the recent forbidden submatchings method of Delcourt and Postle.Comment: 16 page
Morphological and molecular characterisation of a mixed Cryptosporidium muris/Cryptosporidium felis infection in a cat
To date Cryptosporidium muris has been identified by microscopy and genotyping in cats in two studies. We report morphological and genetic evidence of a mixed C. muris and C. felis infection in a cat and provide the first histological, immunohistochemical, in situ hybridisation and genetic confirmation of a C. muris infection in the stomach of a cat. The cat suffered persistent diarrhoea after the initial consultation, which remained unresolved, despite several medical interventions. Further studies are required to determine the range, prevalence and clinical impact of Cryptosporidium species infecting cats
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