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Permutation Complexity Related to the Letter Doubling Map
Article presented at the 8th International Conference Words 2011 in Prague, Czech Republic. This article investigates the combinatorial complexity of infinite permutations on N associated with the image of uniformly recurrent aperiodic binary words under the letter doubling map.
Date:
August 17, 2011
Creator:
Widmer, Steven
System:
The UNT Digital Library
Is There a General Motor Program for Right Versus Left Hand Throwing in Children?
This article discusses whether a general motor program controls some or all aspects of overhand throwing.
Date:
August 29, 2011
Creator:
Thomas, Jerry R.; Alderson, Jacqueline A.; Thomas, Katherine; Campbell, Amity C.; Edwards, W. Brent & Elliott, Bruce C.
System:
The UNT Digital Library
Planning for a Temporary-to-Permanent Housing Solution in Post-Katrina Mississippi: The Story of the Mississippi Cottage
This article examines how local governments and residents responded to the Mississippi Cottage Program.
Date:
August 2011
Creator:
Evans-Cowley, Jennifer & Kitchen, Joseph
System:
The UNT Digital Library
Sources of the Radio Background Considered
We investigate possible origins of the extragalactic radio background reported by the ARCADE 2 collaboration. The surface brightness of the background is several times higher than that which would result from currently observed radio sources. We consider contributions to the background from diffuse synchrotron emission from clusters and the intergalactic medium, previously unrecognized flux from low surface brightness regions of radio sources, and faint point sources below the flux limit of existing surveys. By examining radio source counts available in the literature, we conclude that most of the radio background is produced by radio point sources that dominate at sub {mu}Jy fluxes. We show that a truly diffuse background produced by elections far from galaxies is ruled out because such energetic electrons would overproduce the observed X-ray/{gamma}-ray background through inverse Compton scattering of the other photon fields. Unrecognized flux from low surface brightness regions of extended radio sources, or moderate flux sources missed entirely by radio source count surveys, cannot explain the bulk of the observed background, but may contribute as much as 10%. We consider both radio supernovae and radio quiet quasars as candidate sources for the background, and show that both fail to produce it at the observed …
Date:
August 22, 2011
Creator:
Singal, J.; Stawarz, L.; Lawrence, A. & Petrosian, V.
System:
The UNT Digital Library
Aerosol Imaging with a Soft X-ray Free Electron Laser
Lasers have long played a critical role in the advancement of aerosol science. A new regime of ultrafast laser technology has recently be realized, the world's first soft xray free electron laser. The Free electron LASer in Hamburg, FLASH, user facility produces a steady source of 10 femtosecond pulses of 7-32 nm x-rays with 10{sub 12} photons per pulse. The high brightness, short wavelength, and high repetition rate (>500 pulses per second) of this laser offers unique capabilities for aerosol characterization. Here we use FLASH to perform the highest resolution imaging of single PM2.5 aerosol particles in flight to date. We resolve to 35 nm the morphology of fibrous and aggregated spherical carbonaceous nanoparticles that existed for less than two milliseconds in vacuum. Our result opens the possibility for high spatialand time-resolved single particle aerosol dynamics studies, filling a critical technological need in aerosol science.
Date:
August 22, 2011
Creator:
Bogan, Michael J.; /SLAC /LLNL, Livermore; Boutet, Sebastien; /SLAC National Accelerator Laboratory; Chapman, Henry N.; U., /DESY /Hamburg et al.
System:
The UNT Digital Library
Observation of Magnetic Resonances in Electron Clouds in a Positron Storage Ring
The first experimental observation of magnetic resonances in electron clouds is reported. The resonance was observed as a modulation in cloud intensity for uncoated as well as TiN-coated aluminum surfaces in the positron storage ring of the PEP-II collider at SLAC. Electron clouds frequently arise in accelerators of positively charged particles, and severely impact the machines performance. The TiN coating was found to be an effective remedy, reducing the cloud intensity by three orders of magnitude.
Date:
August 24, 2011
Creator:
Pivi, M. T. F.; Ng, J. S. T.; Cooper, F.; Kharakh, D.; King, F.; Kirby, R. E. et al.
System:
The UNT Digital Library
Revealing deformation spectra of nanocrystalline nickel at elevated temperatures
None
Date:
August 10, 2011
Creator:
Wang, Y M; Ott, R T; Besser, M F & Hamza, A V
System:
The UNT Digital Library
Assessment of radiation effects on diagnostics and electronic devices in the National Ignition Facility
None
Date:
August 26, 2011
Creator:
Khater, H; Dauffy, L; Datte, P; Eckart, M & Jackson, M
System:
The UNT Digital Library
Overview of the Physics and Engineering Design of NSTX Upgrade
None
Date:
August 18, 2011
Creator:
et. al, J M
System:
The UNT Digital Library
Overview of the LIFE Fuel Cycle
None
Date:
August 25, 2011
Creator:
Reyes, S.; Babineau, D.; Davis, R.; Taylor, C.; Anklam, T.; Dunne, M. et al.
System:
The UNT Digital Library
Event Discrimination Using Regional Moment Tensors with Teleseismic-P Constraints
None
Date:
August 10, 2011
Creator:
Ford, S R; Walter, W R & Dreger, D S
System:
The UNT Digital Library
Stellar and Laboratory XUV/EUV Line Ratios inFe XVIII and Fe XIX
None
Date:
August 10, 2011
Creator:
Trabert, E; Beiersdorfer, P & Clementson, J
System:
The UNT Digital Library
Anomalous transient uplift observed at the Lop Nor, China nuclear test site using satellite radar interferometry time-series analysis
None
Date:
August 15, 2011
Creator:
Vincent, P; Buckley, S M; Yang, D & Carle, S F
System:
The UNT Digital Library
Prioritizing and Visualizing Energy Management and
Since the 1970s, energy management and control sys
Date:
August 1, 2011
Creator:
Duarte, Carlos; Acker, Brad; Grosshans, Ray & Ma, Milos
System:
The UNT Digital Library
COG11 - Available Now to Criticality Safety Practitioners
None
Date:
August 8, 2011
Creator:
Buck, R.; Cullen, D.; Heinrichs, D.; Lee, C.; Lent, E.; Krass, A. et al.
System:
The UNT Digital Library
Bioinformatics for Microbial Genotyping of Equine Encephalitis Viruses, Orthopox Viruses, and Hantaviruses
None
Date:
August 8, 2011
Creator:
Gardner, S N & Jaing, C J
System:
The UNT Digital Library
A thermodynamic model for the system SiO2-H2O near the upper critical end point based on quartz solubility experiments at 500-1100 C and 5-20 kbar
None
Date:
August 1, 2011
Creator:
Hunt, J. D. & Manning, C. E.
System:
The UNT Digital Library
Diagnosing Implosions at the National Ignition Facility with X-ray Spectroscopy
None
Date:
August 29, 2011
Creator:
Regan, S. P.; Epstein, R.; Hammel, B. A.; Suter, L. J.; Ralph, J.; Scott, H. et al.
System:
The UNT Digital Library
Recent BaBar Studies of Bottomonium States
None
Date:
August 31, 2011
Creator:
Ziegler, V.
System:
The UNT Digital Library
Engineering Prototype for a Compact Medical Dielectric Wall Accelerator
None
Date:
August 24, 2011
Creator:
Zografos, A.; Hening, A.; Joshkin, V.; Leung, K.; Pearson, D.; Pearce-Percy, H. et al.
System:
The UNT Digital Library
Novel Chemistry at the National Ignition Facility
None
Date:
August 27, 2011
Creator:
Eggert, J H
System:
The UNT Digital Library
On the Influence of Shrub Height and Expansion on Boreal Climate
None
Date:
August 22, 2011
Creator:
Bonfils, C.; Phillips, T.; Lawrence, D.; Cameron-Smith, P.; Riley, W. & Subin, Z.
System:
The UNT Digital Library
Heating dynamics of CO2-laser irradiated silica particles with evaporative shrinking: measurements and modeling
None
Date:
August 11, 2011
Creator:
Elhadj, S; Qiu, S R; Monterossa, A M & Stolz, C J
System:
The UNT Digital Library
Influence of exchange and correlation on structural and electronic properties of AlN, GaN, and InN polytypes
None
Date:
August 1, 2011
Creator:
de Carvalho, L; Schleife, A & Bechstedt, F
System:
The UNT Digital Library