2,118 research outputs found
Ranking the Risks: The 10 Pathogen-Food Combinations With the Greatest Burden on Public Health
Examines food-borne pathogens with the highest disease burdens and the top ten foods most commonly contaminated by them, such as salmonella in poultry, toxoplasma in pork, and listeria in deli meats. Makes policy recommendations for improving prevention
What We Know About Teamwork and Multiteam Coordination in Aviation: Overview Model
Much of the work of pilots, flight attendants, air traffic controllers, aircraft mechanics, and flight operations center personnel is done in teams and coordination within and between teams is required. This is the first in a five-article series discussing theory and research relating to teamwork in aviation. This article presents a comprehensive model of teamwork in aviation. It builds on leading teamwork theories and integrates other aviation-relevant constructs such as decision making, technology, and culture. All components of the model have been extensively supported in the general team literature, but the extent of aviation-specific research varies considerably across constructs. Additional articles in this series examine the various components in greater detail
Neptune at Summer Solstice: Zonal Mean Temperatures from Ground-Based Observations 2003-2007
Imaging and spectroscopy of Neptune's thermal infrared emission is used to
assess seasonal changes in Neptune's zonal mean temperatures between Voyager-2
observations (1989, heliocentric longitude Ls=236) and southern summer solstice
(2005, Ls=270). Our aim was to analyse imaging and spectroscopy from multiple
different sources using a single self-consistent radiative-transfer model to
assess the magnitude of seasonal variability. Globally-averaged stratospheric
temperatures measured from methane emission tend towards a quasi-isothermal
structure (158-164 K) above the 0.1-mbar level, and are found to be consistent
with spacecraft observations of AKARI. This remarkable consistency, despite
very different observing conditions, suggests that stratospheric temporal
variability, if present, is 5 K at 1 mbar and 3 K at 0.1 mbar during
this solstice period. Conversely, ethane emission is highly variable, with
abundance determinations varying by more than a factor of two. The retrieved
C2H6 abundances are extremely sensitive to the details of the T(p) derivation.
Stratospheric temperatures and ethane are found to be latitudinally uniform
away from the south pole (assuming a latitudinally-uniform distribution of
stratospheric methane). At low and midlatitudes, comparisons of synthetic
Voyager-era images with solstice-era observations suggest that tropospheric
zonal temperatures are unchanged since the Voyager 2 encounter, with cool
mid-latitudes and a warm equator and pole. A re-analysis of Voyager/IRIS 25-50
{\mu}m mapping of tropospheric temperatures and para-hydrogen disequilibrium
suggests a symmetric meridional circulation with cold air rising at
mid-latitudes (sub-equilibrium para-H2 conditions) and warm air sinking at the
equator and poles (super-equilibrium para-H2 conditions). The most significant
atmospheric changes are associated with the polar vortex (absent in 1989).Comment: 35 pages, 19 figures. Accepted for publication in Icaru
7,11,15,28-Tetramethyl-1,21,23,25-tetrakis(2-phenylethyl)resorcin[4]arene ethyl acetate clathrate
The title compound, C68H64O8·C4H8O2, is a new resorcin[4]arene cavitand synthetic precursor, obtained by alkylation of a previously reported resorcin[4]arene. The additional alkyl bridges significantly rigidify the structure and enforce a ‘bowl’ shape on the molecular cavity. In the crystal structure, the molecule lies on a crystallographic mirror plane, and a single ethyl acetate molecule (also lying on the mirror plane) is present within the compound cavity, illustrating the host capabilities of the molecule
Developing a High-Fidelity Simulation Lab: Challenges and Lessons Learned
With a decade of experience, the Middle Tennessee State University (MTSU) NASA FOCUS (Flight Operations Center- Unified Simulation) lab is a vital part of the educational experience for senior aerospace students. The NASA FOCUS Lab is a high fidelity simulation of a flight dispatch center in a collegiate setting. Students are trained in specific positions in the lab and must operate within a complex team environment to run the virtual airline within their shift. The purpose of the lab is to provide a learning platform for students to practice the requisite teamwork skills necessary to effectively work in airline operations. Designing effective simulation experiences and providing adequate performance feedback is complex. This paper discusses some of the challenges we encountered and lessons learned through a ten-year span of operation and refinement. By presenting this information, it may help future researchers in the design and development of high-fidelity simulation labs
Succinate dehydrogenase activity in the telencephalon of crocodiles correlates with the projection areas of sensory thalamic nuclei
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/22953/1/0000520.pd
Anatomical evidence for an ascending somatosensory pathway to the telencephalon in crocodiles, Caiman crocodilus
A series of experiments in Caiman crocodilus that outlines an ascending somatosensory pathway to the telencephalon is described. This telencephalic somatosensory area was found to correspond to a region high in succinate dehydrogenase activity.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/46550/1/221_2004_Article_BF00237800.pd
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