1,035 research outputs found
Libertinism: An Alternative to Traditional Religion
In recent years there has been a considerable increase in the amount of empirical research done in the area of the sociology of religion. Most of this type of research has been a gradual attempt of working toward the possibility of establishing a casual relationship between religious beliefs and human social behavior
Economic Effects of Added Growing Season Rainfall on North Dakota Agriculture
Farm Management, Resource /Energy Economics and Policy,
Investigation of methods to produce a uniform cloud of fuel particles in a flame tube
The combustion of a uniform, quiescent cloud of 30-micron fuel particles in a flame tube was proposed as a space-based, low-gravity experiment. The subject is the normal- and low-gravity testing of several methods to produce such a cloud, including telescoping propeller fans, air pumps, axial and quadrature acoustical speakers, and combinations of these devices. When operated in steady state, none of the methods produced an acceptably uniform cloud (+ or - 5 percent of the mean concentration), and voids in the cloud were clearly visible. In some cases, severe particle agglomeration was observed; however, these clusters could be broken apart by a short acoustic burst from an axially in-line speaker. Analyses and experiments reported elsewhere suggest that transient, acoustic mixing methods can enhance cloud uniformity while minimizing particle agglomeration
Topology Optimization of Surface-enhanced Raman Scattering Substrates
Surface-enhanced Raman spectroscopy is a powerful and versatile sensing
method with a detection limit down to the single molecule level. In this
article, we demonstrate how topology optimization (TopOpt) can be used for
designing surface enhanced Raman scattering (SERS) substrates adhering to
realistic fabrication constraints. As an example, we experimentally
demonstrated a SERS enhancement factor of 5*10e4 for the 604 cm-1 Raman line of
rhodamine 6G using metal nanostructures with a critical dimension of 20 nm. We
then show that, by relaxing the fabrication constraints, TopOpt may be used to
design SERS substrates with orders of magnitude larger enhancement factor. The
results validate topology optimization as an effective method for engineering
nanostructures with optimal performance and fabrication tolerance.Comment: 12 page
Bombus griseocollis.
17 pages : illustrations ; 26 cm.This paper describes and illustrates the egg, fifth, first, and fourth larval instars, as well as the female pupa of Bombus (Cullumanobombus) griseocollis (DeGeer), all collected from a single nest in June 2017 in Wisconsin. In so doing, attempts are made to understand the biological significance of the anatomical and behavioral features of these various life stages
Neurophysiology
Contains reports on four research projects.Bell Telephone Laboratories, IncorporatedThe Teagle Foundation, IncorporatedNational Science Foundatio
Complexities in Subsetting Level 2 Data
Satellite Level 2 data presents unique challenges for tools and services. From nonlinear spatial geometry to inhomogeneous file data structure to inconsistent temporal variables to complex data variable dimensionality to multiple file formats, there are many difficulties in creating general tools for Level 2 data support. At NASA Goddard Earth Sciences Data and Information Services Center (GES DISC), we are implementing a general Level 2 Subsetting service for Level 2 data to a user-specified spatio-temporal region of interest (ROI). In this presentation, we will unravel some of the challenges faced in creating this service and the strategies we used to surmount them
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