2,855 research outputs found
Activity and accomplishments of dish/Stirling electric power system development
The development of the solar parabolic-dish/Stirling-engine electricity generating plant known as the dish/Stirling electric power system is described. The dish/Stirling electric power system converts sunlight to electricity more efficiently than any known existing solar electric power system. The fabrication and characterization of the test bed concentrators that were used for Stirling module testing and of the development of parabolic dish concentrator No. 2, an advanced solar concentrator unit considered for use with the Stirling power conversion unit is discussed
Evaluating Title VII Exposure in a Manufacturing Setting: A Case Study for Human Resource Management Students
Since Title VII of the Civil Rights Act of 1964 became an established part of the employment legal framework, human resource management professionals and compliance officers have played a vital role in evaluating their companies’ vulnerability to litigation based on perceived violations of Title VII, the Age Discrimination in Employment Act, the American with Disabilities Act, and other associated equality protection legislation. Factors to be considered include the plaintiff’s burden of proof, legitimate business defenses, and collection and evaluation of reliable data. This case study calls upon human resource management graduate students to evaluate the potential exposure of a defense manufacturer to gender discrimination litigation, and has been presented in an online learning environment
Computing a Knot Invariant as a Constraint Satisfaction Problem
We point out the connection between mathematical knot theory and spin
glass/search problem. In particular, we present a statistical mechanical
formulation of the problem of computing a knot invariant; p-colorability
problem, which provides an algorithm to find the solution. The method also
allows one to get some deeper insight into the structural complexity of knots,
which is expected to be related with the landscape structure of constraint
satisfaction problem.Comment: 6 pages, 3 figures, submitted to short note in Journal of Physical
Society of Japa
Mid-Infrared Imaging of the Bipolar Planetary Nebula M2-9 from SOFIA
We have imaged the bipolar planetary nebula M2-9 using SOFIA's FORCAST
instrument in six wavelength bands between 6.6 and 37.1 . A bright
central point source, unresolved with SOFIA's 4-to-5 beam,
is seen at each wavelength, and the extended bipolar lobes are clearly seen at
19.7 and beyond. The photometry between 10 and 25 is well fit
by the emission predicted from a stratified disk seen at large inclination, as
has been proposed for this source by Lykou et al and by Smith and Gehrz. The
principal new results in this paper relate to the distribution and properties
of the dust that emits the infrared radiation. In particular, a considerable
fraction of this material is spread uniformly through the lobes, although the
dust density does increase at the sharp outer edge seen in higher resolution
optical images of M2-9. The dust grain population in the lobes shows that small
( 1 ) particles appear to be present in
roughly equal amounts by mass. We suggest that collisional processing within
the bipolar outflow plays an important role in establishing the particle size
distribution.Comment: 40 pages, 9 figures, 2 table
Magnetic properties of photospheric regions having very low magnetic flux
The magnetic properties of the quiet Sun are investigated using a novel
inversion code, FATIMA, based on the Principal Component Analysis of the
observed Stokes profiles. The stability and relatively low noise sensitivity of
this inversion procedure allows for the systematic inversion of large data sets
with very weak polarization signal. Its application to quiet Sun observations
of network and internetwork regions reveals that a significant fraction of the
quiet Sun contains kilogauss fields (usually with very small filling factors)
and confirms that the pixels with weak polarization account for most of the
magnetic flux. Mixed polarities in the resolution element are also found to
occur more likely as the polarization weakens.Comment: To apapear in ApJ. 39 pages, 12 figures (2 of them are color figures
Homotopy on spatial graphs and generalized Sato-Levine invariants
Edge-homotopy and vertex-homotopy are equivalence relations on spatial graphs
which are generalizations of Milnor's link-homotopy. Fleming and the author
introduced some edge (resp. vertex)-homotopy invariants of spatial graphs by
applying the Sato-Levine invariant for the constituent 2-component
algebraically split links. In this paper, we construct some new edge (resp.
vertex)-homotopy invariants of spatial graphs without any restriction of
linking numbers of the constituent 2-component links by applying the
generalized Sato-Levine invariant.Comment: 16 pages, 13 figure
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