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Dynamics of Electroencephalogram Entropy and Pitfalls of Scaling Detection (open access)

Dynamics of Electroencephalogram Entropy and Pitfalls of Scaling Detection

This article discusses dynamics of electroencephalogram entropy and pitfalls of scaling detection. Herein the authors study the time evolution of diffusion entropy to elucidate the scaling of EGG time series.
Date: March 10, 2010
Creator: Ignaccolo, Massimiliano; Latka, Miroslaw; Jernajczyk, Wojciech; Grigolini, Paolo & West, Bruce J.
System: The UNT Digital Library
Using WebGBrowse to Visualize Genome Annotation on GBrowse (open access)

Using WebGBrowse to Visualize Genome Annotation on GBrowse

Article discussing using WebGBrowse to visualize genome annotation on GBrowse.
Date: March 2010
Creator: Podicheti, Ram & Dong, Qunfeng
System: The UNT Digital Library
Reference book indexes reviewed (open access)

Reference book indexes reviewed

Article on a study of the frequency and nature of remarks about indexes found in reviews of reference books.
Date: March 2010
Creator: Sassen, Catherine
System: The UNT Digital Library
Coherent excitation of a two-level atom driven by a far-off-resonant classical field: Analytical solutions (open access)

Coherent excitation of a two-level atom driven by a far-off-resonant classical field: Analytical solutions

Article on coherent excitation of a two-level atom driven by a far off-resonant classical field.
Date: March 15, 2010
Creator: Jha, Pankaj K. & Rostovtsev, Yuri V.
System: The UNT Digital Library
Carrier-Envelope Phase Effect on Atomic Excitation by Few-Cycle rf Pulses (open access)

Carrier-Envelope Phase Effect on Atomic Excitation by Few-Cycle rf Pulses

Article on carrier-envelope phase effect on atomic excitation by few-cycle rf pulses.
Date: March 8, 2010
Creator: Li, Hebin; Sautenkov, Vladimir A.; Rostovtsev, Yuri V.; Kash, Michael M.; Anisimov, Petr M.; Welch, George R. et al.
System: The UNT Digital Library
Net Hydrogenation of Pt-NHPh Bond Is Catalyzed by Elemental Pt (open access)

Net Hydrogenation of Pt-NHPh Bond Is Catalyzed by Elemental Pt

This article discusses the net hydrogenation of Pt-NHPh bond catalyzed by elemental Pt.
Date: March 11, 2010
Creator: Webb, Joanna R.; Pierpont, Aaron W.; Munro-Leighton, Colleen; Gunnoe, T. Brent; Cundari, Thomas R., 1964- & Boyle, Paul D.
System: The UNT Digital Library
Modified embedded atom method study of the mechanical properties of carbon nanotube reinforced nickel composites (open access)

Modified embedded atom method study of the mechanical properties of carbon nanotube reinforced nickel composites

Article on a modified embedded atom method study of the mechanical properties of carbon nanotube reinforced nickel composites.
Date: March 11, 2010
Creator: Uddin, Jamal; Baskes, Michael I.; Srivilliputhur, Srinivasan; Cundari, Thomas R., 1964- & Wilson, Angela K.
System: The UNT Digital Library
The Biological and Toxicological Activity of Gases and Vapors (open access)

The Biological and Toxicological Activity of Gases and Vapors

Article discussing research on the biological and toxicological activity of gases and vapors.
Date: March 2010
Creator: Abraham, M. H. (Michael H.); Sánchez-Moreno, Ricardo; Gil-Lostes, Javier; Acree, William E. (William Eugene); Cometto-Muñiz, J. Enrique & Cain, William S.
System: The UNT Digital Library
Study of Ether-, Alcohol-, or Cyano-Functionalized Ionic Liquids Using Inverse Gas Chromatography (open access)

Study of Ether-, Alcohol-, or Cyano-Functionalized Ionic Liquids Using Inverse Gas Chromatography

This article discusses the study of ether-, alcohol, or cyano-functionalized ionic liquids using inverse gas chromatography.
Date: March 11, 2010
Creator: Revelli, Anne-Laure; Mutelet, Fabrice; Jaubert, Jean-Noël; Garcia-Martinez, Marina; Sprunger, Laura M.; Acree, William E. (William Eugene) et al.
System: The UNT Digital Library
First-principles analysis of electron-phonon interactions in graphene (open access)

First-principles analysis of electron-phonon interactions in graphene

Article on first-principles analysis of electron-phonon interactions in graphene.
Date: March 16, 2010
Creator: Borysenko, Kostyantyn M.; Mullen, Jeffrey T.; Barry, E. A.; Paul, S.; Semenov, Yuriy G.; Zavada, J. M. et al.
System: The UNT Digital Library
Caregiver Participation in Hospice Interdisciplinary Team Meetings via Videophone Technology: A Pilot Study to Improve Pain Management (open access)

Caregiver Participation in Hospice Interdisciplinary Team Meetings via Videophone Technology: A Pilot Study to Improve Pain Management

Article on a pilot study to improve pain management and caregiver participation in hospice interdisciplinary team meetings via videophone technology.
Date: March 18, 2010
Creator: Oliver, Debra Parker; Demiris, George; Wittenberg-Lyles, Elaine; Porock, Davina, Ph. D.; Collier, Jacqueline & Arthur, Antony
System: The UNT Digital Library
NPP-16/Nup50 Function and CDK-1 Inactivation Are Associated with Anoxia-induced Prophase Arrest in Caenorhabditis elgans (open access)

NPP-16/Nup50 Function and CDK-1 Inactivation Are Associated with Anoxia-induced Prophase Arrest in Caenorhabditis elgans

Article discussing how NPP-16/Nup50 function and CDK-1 inactivation are associated with anoxia-induced prophase arrest in Caenorhabditis elegans.
Date: March 1, 2010
Creator: Hajeri, Vinita A.; Little, Brent A.; Ladage, Mary L. & Padilla, Pamela A.
System: The UNT Digital Library
Genomic and Co-expression Analyses Predict Multiple Genes Involved in Triterpene Saponin Biosynthesis in Medicago truncatula (open access)

Genomic and Co-expression Analyses Predict Multiple Genes Involved in Triterpene Saponin Biosynthesis in Medicago truncatula

Article discusses genomic and coexpression analyses predicting multiple genes involved in triterpene saponin biosynthesis in Medicago truncatula.
Date: March 9, 2010
Creator: Naoumkina, Marina A.; Modolo, Luzia V.; Huhman, David; Urbanczyk-Wochniak, Ewa; Tang, Yuhong; Sumner, Lloyd W. et al.
System: The UNT Digital Library
Hydrogen Bonding Under High-Pressure (open access)

Hydrogen Bonding Under High-Pressure

None
Date: March 12, 2010
Creator: Manaa, M R & Fried, L E
System: The UNT Digital Library
In vitro High-Resolution Architecture and Structural Dynamics of Bacterial Systems (open access)

In vitro High-Resolution Architecture and Structural Dynamics of Bacterial Systems

None
Date: March 18, 2010
Creator: Malkin, A. J.; Plomp, M.; Leighton, T. J.; Vogelstein, B. & Holman, H.
System: The UNT Digital Library
A Comparison of Three Voting Methods for Bagging with the MLEM2 Algorithm (open access)

A Comparison of Three Voting Methods for Bagging with the MLEM2 Algorithm

This paper presents results of experiments on some data sets using bagging on the MLEM2 rule induction algorithm. Three different methods of ensemble voting, based on support (a non-democratic voting in which ensembles vote with their strengths), strength only (an ensemble with the largest strength decides to which concept a case belongs) and democratic voting (each ensemble has at most one vote) were used. Our conclusions are that though in most cases democratic voting was the best, it is not significantly better than voting based on support. The strength voting was the worst voting method.
Date: March 17, 2010
Creator: Cohagan, Clinton; Grzymala-Busse, Jerzy W. & Hippe, Zdzislaw S.
System: The UNT Digital Library
Adult Human Pancreatic Islet Beta-Cells Display Limited Turnover and Long Lifespan as Determined by In-Vivo Thymidine Analog Incorporation and Radiocarbon Dating (open access)

Adult Human Pancreatic Islet Beta-Cells Display Limited Turnover and Long Lifespan as Determined by In-Vivo Thymidine Analog Incorporation and Radiocarbon Dating

Diabetes mellitus results from an absolute or relative deficiency of insulin producing pancreatic beta-cells. The adult human beta-cell's turnover rate remains unknown. We employed novel techniques to examine adult human islet beta-cell turnover and longevity in vivo. Subjects enrolled in NIH clinical trials received thymidine analogues [iododeoxyuridine (IdU) or bromodeoxyuridine (BrdU)] 8-days to 4-years prior to death. Archival autopsy samples from ten patients (aged 17-74 years) were employed to assess beta-cell turnover by scoring nuclear analog labeling within insulin staining cells. Human adult beta-cell longevity was determined by estimating the cells genomic DNA integration of atmospheric carbon-14 ({sup 14}C). DNA was purified from pancreatic islets isolated from cadaveric donors; whole islet prep DNA was obtained from a 15 year old donor, and purified beta-cell DNA was obtained from two donors (age 48 and 80 years). {sup 14}C levels were then determined using accelerator mass spectrometry (AMS). Cellular 'birth date' was determined by comparing the subject's DNA {sup 14}C content relative to a well-established {sup 14}C atmospheric prevalence curve. In the two subjects less than age 20 years, 1-2% of the beta-cell nuclei co-stained for BrdU/IdU. No beta-cell nuclei co-stained in the eight patients more than 30 years old. Consistent with …
Date: March 15, 2010
Creator: Perl, S.; Kushner, J. A.; Buchholz, B. A.; Meeker, A. K.; Stein, G. M.; Hsieh, M. et al.
System: The UNT Digital Library
Superresolution with Seismic Arrays using Empirical Matched Field Processing (open access)

Superresolution with Seismic Arrays using Empirical Matched Field Processing

Scattering and refraction of seismic waves can be exploited with empirical matched field processing of array observations to distinguish sources separated by much less than the classical resolution limit. To describe this effect, we use the term 'superresolution', a term widely used in the optics and signal processing literature to denote systems that break the diffraction limit. We illustrate superresolution with Pn signals recorded by the ARCES array in northern Norway, using them to identify the origins with 98.2% accuracy of 549 explosions conducted by closely-spaced mines in northwest Russia. The mines are observed at 340-410 kilometers range and are separated by as little as 3 kilometers. When viewed from ARCES many are separated by just tenths of a degree in azimuth. This classification performance results from an adaptation to transient seismic signals of techniques developed in underwater acoustics for localization of continuous sound sources. Matched field processing is a potential competitor to frequency-wavenumber and waveform correlation methods currently used for event detection, classification and location. It operates by capturing the spatial structure of wavefields incident from a particular source in a series of narrow frequency bands. In the rich seismic scattering environment, closely-spaced sources far from the observing array …
Date: March 24, 2010
Creator: Harris, D B & Kvaerna, T
System: The UNT Digital Library
Integrated Nucleosynthesis in Neutrino Driven Winds (open access)

Integrated Nucleosynthesis in Neutrino Driven Winds

Although they are but a small fraction of the mass ejected in core-collapse supernovae, neutrino-driven winds (NDWs) from nascent proto-neutron stars (PNSs) have the potential to contribute significantly to supernova nucleosynthesis. In previous works, the NDW has been implicated as a possible source of r-process and light p-process isotopes. In this paper we present time-dependent hydrodynamic calculations of nucleosynthesis in the NDW which include accurate weak interaction physics coupled to a full nuclear reaction network. Using two published models of PNS neutrino luminosities, we predict the contribution of the NDW to the integrated nucleosynthetic yield of the entire supernova. For the neutrino luminosity histories considered, no true r-process occurs in the most basic scenario. The wind driven from an older 1.4M{sub {circle_dot}} model for a PNS is moderately neutron-rich at late times however, and produces {sup 87}Rb, {sup 88}Sr, {sup 89}Y, and {sup 90}Zr in near solar proportions relative to oxygen. The wind from a more recently studied 1.27M{sub {circle_dot}} PNS is proton-rich throughout its entire evolution and does not contribute significantly to the abundance of any element. It thus seems very unlikely that the simplest model of the NDW can produce the r-process. At most, it contributes to the …
Date: March 26, 2010
Creator: Roberts, L F; Woosley, S E & Hoffman, R D
System: The UNT Digital Library
Kalman filtering to suppress spurious signals in Adaptive Optics control (open access)

Kalman filtering to suppress spurious signals in Adaptive Optics control

In many scenarios, an Adaptive Optics (AO) control system operates in the presence of temporally non-white noise. We use a Kalman filter with a state space formulation that allows suppression of this colored noise, hence improving residual error over the case where the noise is assumed to be white. We demonstrate the effectiveness of this new filter in the case of the estimated Gemini Planet Imager tip-tilt environment, where there are both common-path and non-common path vibrations. We discuss how this same framework can also be used to suppress spatial aliasing during predictive wavefront control assuming frozen flow in a low-order AO system without a spatially filtered wavefront sensor, and present experimental measurements from Altair that clearly reveal these aliased components.
Date: March 29, 2010
Creator: Poyneer, L & Veran, J P
System: The UNT Digital Library
Seedless Polyol Synthesis and CO Oxidation Activity of Monodisperse (111) and (100)-Oriented Rhodium Nanocrystals in Sub-10 nm Sizes (open access)

Seedless Polyol Synthesis and CO Oxidation Activity of Monodisperse (111) and (100)-Oriented Rhodium Nanocrystals in Sub-10 nm Sizes

Monodisperse sub-10 nm (6.5 nm) sized Rh nanocrystals with (111) and (100) surface structures were synthesized by a seedless polyol reduction in ethylene glycol, with poly(vinylpyrrolidone) as a capping ligand. When using [Rh(Ac){sub 2}]{sub 2} as the metal precursor, (111)-oriented Rh nanopolyhedra containing 76% (111)-twined hexagons (in 2D projection) were obtained; whereas, when employing RhCl{sub 3} as the metal precursor in the presence of alkylammonium bromide, such as tetramethylammonium bromide and trimethyl(tetradecyl)ammonium bromide, (100)-oriented Rh nanocubes were obtained with 85% selectivity. The {l_brace}100{r_brace} faces of the Rh nanocrystals are stabilized by chemically adsorbed Br{sup -} ions from alkylammonium bromides, which led to (100)-oriented nanocubes. Monolayer films of the (111)-oriented Rh nanopolyhedra and (100)-oriented Rh nanocubes were deposited on silicon wafers in a Langmuir-Blodgett trough to make model 2D nanoarray catalysts. These nanocatalysts were active for CO oxidation by O{sub 2}, and the turnover frequency was independent of nanoparticle shape, consistent with that previously observed for Rh(111) and Rh(100) single crystals.
Date: March 15, 2010
Creator: Zhang, Yawen; Grass, Michael E.; Huang, Wenyu & Somorjai, Gabor A.
System: The UNT Digital Library
RESPONSE OF ALUMINUM SPHERES IN SITU TO DETONATION (open access)

RESPONSE OF ALUMINUM SPHERES IN SITU TO DETONATION

Time sequence x-ray imaging was utilized to determine the response of aluminum spheres embedded in a detonating high-explosive cylinder. The size of these spheres ranged from 3/8-inch to 1/32-inch in diameter. These experiments directly observed the response of the spheres as a function of time after interaction with the detonation wave. As the spheres are entrained in the post-detonation flow field, they are accelerating and their velocity profile is complicated, but can be determined from the radiography. Using the aluminum spheres as tracers, radial velocities of order 1.6 mm/us and horizontal velocities of order 0.08 mm/us were measured at early times post detonation. In terms of response, these data show that the largest sphere deforms and fractures post detonation. The intermediate size spheres suffer negligible deformation, but appear to ablate post detonation. Post detonation, the smallest spheres either react, mechanically disintegrate, atomize as a liquid or some combination of these.
Date: March 26, 2010
Creator: Molitoris, J D; Garza, R G; Tringe, J W; Batteux, J D; Wong, B M; Villafana, R J et al.
System: The UNT Digital Library
Correction of the Chromaticity up to Second Order for MEIC (open access)

Correction of the Chromaticity up to Second Order for MEIC

The proposed electron collider lattice exhibits low β- functions at the Interaction Point (IP) (βx∗100mm − βy∗ 20 mm) and rather large equilibrium momentum spread of the collider ring (δp/p = 0.00158). Both features make the chromatic corrections of paramount importance. Here the chromatic effects of the final focus quadruples are cor- rected both locally and globally. Local correction features symmetric sextupole families around the IP, the betatron phase advances from the IP to the sextupoles are chosen to eliminate the second order chromatic aberration. Global interleaved families of sextupoles are placed in the figure-8 arc sections, and non-interleaved families at straight sec- tion making use of the freely propagated dispersion wave from the arcs. This strategy minimizes the required sex- tupole strength and eventually leads to larger dynamic aper- ture of the collider. The resulting spherical aberrations induced by the sextupoles are mitigated by design; the straight and arc sections optics features an inverse identity transformation between sextupoles in each pair.
Date: March 1, 2010
Creator: H. K. Sayed, S.A. Bogacz, P. Chevtsov
System: The UNT Digital Library
Essential Services Meeting Summary (open access)

Essential Services Meeting Summary

This summary of proceedings report focuses on an end-of-grant meeting at which grantees for Project Area 5 were convened.
Date: March 1, 2010
Creator: CHE, HCTT
System: The UNT Digital Library