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1,029 Matching Results
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Evidence for Nodal Superconductivity in LaFePO from Scanning SQUID Susceptometry
We measure changes in the penetration depth {lambda} of the T{sub c} {approx} 6 K superconductor LaFePO. In the process scanning SQUID susceptometry is demonstrated as a technique for accurately measuring local temperature-dependent changes in {lambda}, making it ideal for studying early or difficult-to-grow materials. {lambda} of LaFePO is found to vary linearly with temperature from 0.36 to {approx} 2 K, with a slope of 143 {+-} 15 {angstrom}/K, suggesting line nodes in the superconducting order parameter. The linear dependence up to {approx} T{sub c}/3 is similar to the cuprate superconductors, indicating well-developed nodes.
Date:
April 13, 2009
Creator:
Hicks, Clifford W.; Lippman, Thomas M.; /Stanford U., Geballe Lab. /SLAC; Huber, Martin E.; /Colorado U., Denver; Analytis, James G. et al.
Object Type:
Article
System:
The UNT Digital Library
Effects of Triclosan, Triclocarban, and Caffeine Exposure on the Development of Amphibian Larvae.
Triclosan and triclocarban are antimicrobials found in numerous consumer products, while caffeine is the most commonly consumed stimulant by humans. This study was undertaken to determine the effects of triclosan, triclocarban, and caffeine on the development and physiology of amphibian larvae. LC50 values of triclosan and triclocarban were determined after 96 hours for three North American larval species: Acris crepitans blanchardii, Bufo woodhousii woodhousii, Rana sphenocephala, and for a common amphibian developmental model: Xenopus laevis. Amphibian larvae were most sensitive to triclosan and triclocarban exposure during early development based upon 96-hour LC50 values. Heart rates for X. laevis and North American larvae exposed to triclosan were variable throughout development. However, significantly lower heart rates were observed in all larvae exposed to triclocarban. Metabolic rates of X. laevis and R. sphenocephala larvae exposed to triclosan were significantly affected in larvae exposed to ½ LC50 and the LC50 concentration. Metabolic rates of X. laevis larvae exposed to triclocarban were significantly affected by exposure to ½ LC50 concentrations in three of four stages investigated. No significant differences were observed in North American larvae exposed to triclocarban. Tissue uptake, lipid uptake, tissue bioconcentration factor (BCF) and lipid BCF of triclosan and triclocarban were investigated …
Date:
August 2009
Creator:
Palenske, Nicole Marie
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Calibration Monitor for Dark Energy Experiments
The goal of this program was to design, build, test, and characterize a flight qualified calibration source and monitor for a Dark Energy related experiment: ACCESS - 'Absolute Color Calibration Experiment for Standard Stars'. This calibration source, the On-board Calibration Monitor (OCM), is a key component of our ACCESS spectrophotometric calibration program. The OCM will be flown as part of the ACCESS sub-orbital rocket payload in addition to monitoring instrument sensitivity on the ground. The objective of the OCM is to minimize systematic errors associated with any potential changes in the ACCESS instrument sensitivity. Importantly, the OCM will be used to monitor instrument sensitivity immediately after astronomical observations while the instrument payload is parachuting to the ground. Through monitoring, we can detect, track, characterize, and thus correct for any changes in instrument senstivity over the proposed 5-year duration of the assembled and calibrated instrument.
Date:
November 23, 2009
Creator:
Kaiser, M. E.
Object Type:
Report
System:
The UNT Digital Library
Lexington Leader (Lexington, Tex.), Vol. 13, No. 567, Ed. 1 Thursday, March 5, 2009
Weekly newspaper from Lexington, Texas that includes local, state, and national news along with advertising.
Date:
March 5, 2009
Creator:
Terrell, Cindy
Object Type:
Newspaper
System:
The Portal to Texas History
MicrobesOnline: an integrated portal for comparative and functional genomics
Since 2003, MicrobesOnline (http://www.microbesonline.org) has been providing a community resource for comparative and functional genome analysis. The portal includes over 1000 complete genomes of bacteria, archaea and fungi and thousands of expression microarrays from diverse organisms ranging from model organisms such as Escherichia coli and Saccharomyces cerevisiae to environmental microbes such as Desulfovibrio vulgaris and Shewanella oneidensis. To assist in annotating genes and in reconstructing their evolutionary history, MicrobesOnline includes a comparative genome browser based on phylogenetic trees for every gene family as well as a species tree. To identify co-regulated genes, MicrobesOnline can search for genes based on their expression profile, and provides tools for identifying regulatory motifs and seeing if they are conserved. MicrobesOnline also includes fast phylogenetic profile searches, comparative views of metabolic pathways, operon predictions, a workbench for sequence analysis and integration with RegTransBase and other microbial genome resources. The next update of MicrobesOnline will contain significant new functionality, including comparative analysis of metagenomic sequence data. Programmatic access to the database, along with source code and documentation, is available at http://microbesonline.org/programmers.html.
Date:
September 17, 2009
Creator:
Dehal, Paramvir S.; Joachimiak, Marcin P.; Price, Morgan N.; Bates, John T.; Baumohl, Jason K.; Chivian, Dylan et al.
Object Type:
Article
System:
The UNT Digital Library
Lexington Leader (Lexington, Tex.), Vol. 13, No. 602, Ed. 1 Thursday, November 5, 2009
Weekly newspaper from Lexington, Texas that includes local, state, and national news along with advertising.
Date:
November 5, 2009
Creator:
Terrell, Cindy
Object Type:
Newspaper
System:
The Portal to Texas History
Lexington Leader (Lexington, Tex.), Vol. 13, No. 597, Ed. 1 Thursday, October 1, 2009
Weekly newspaper from Lexington, Texas that includes local, state, and national news along with advertising.
Date:
October 1, 2009
Creator:
Terrell, Cindy
Object Type:
Newspaper
System:
The Portal to Texas History
Lexington Leader (Lexington, Tex.), Vol. 13, No. 565, Ed. 1 Thursday, February 19, 2009
Weekly newspaper from Lexington, Texas that includes local, state, and national news along with advertising.
Date:
February 19, 2009
Creator:
Terrell, Cindy
Object Type:
Newspaper
System:
The Portal to Texas History
Lexington Leader (Lexington, Tex.), Vol. 13, No. 596, Ed. 1 Thursday, September 24, 2009
Weekly newspaper from Lexington, Texas that includes local, state, and national news along with advertising.
Date:
September 24, 2009
Creator:
Terrell, Cindy
Object Type:
Newspaper
System:
The Portal to Texas History
Lexington Leader (Lexington, Tex.), Vol. 13, No. 568, Ed. 1 Thursday, March 12, 2009
Weekly newspaper from Lexington, Texas that includes local, state, and national news along with advertising.
Date:
March 12, 2009
Creator:
Terrell, Cindy
Object Type:
Newspaper
System:
The Portal to Texas History
Reviving Lending to Small Businesses and Families and the Impact of the TALF
May report of the U.S. Congressional Oversight Panel describing their activities and findings regarding consumer lending to small businesses and households through the Term Asset-Backed Securities Loan Facility program (TALF).
Date:
May 7, 2009
Creator:
United States. Congressional Oversight Panel.
Object Type:
Report
System:
The UNT Digital Library
Lexington Leader (Lexington, Tex.), Vol. 13, No. 601, Ed. 1 Thursday, October 29, 2009
Weekly newspaper from Lexington, Texas that includes local, state, and national news along with advertising.
Date:
October 29, 2009
Creator:
Terrell, Cindy
Object Type:
Newspaper
System:
The Portal to Texas History
Lexington Leader (Lexington, Tex.), Vol. 13, No. 609, Ed. 1 Thursday, December 24, 2009
Weekly newspaper from Lexington, Texas that includes local, state, and national news along with advertising.
Date:
December 24, 2009
Creator:
Terrell, Cindy
Object Type:
Newspaper
System:
The Portal to Texas History
Lexington Leader (Lexington, Tex.), Vol. 13, No. 560, Ed. 1 Thursday, January 15, 2009
Weekly newspaper from Lexington, Texas that includes local, state, and national news along with advertising.
Date:
January 15, 2009
Creator:
Terrell, Cindy
Object Type:
Newspaper
System:
The Portal to Texas History
Lexington Leader (Lexington, Tex.), Vol. 13, No. 605, Ed. 1 Thursday, November 26, 2009
Weekly newspaper from Lexington, Texas that includes local, state, and national news along with advertising.
Date:
November 26, 2009
Creator:
Terrell, Cindy
Object Type:
Newspaper
System:
The Portal to Texas History
Lexington Leader (Lexington, Tex.), Vol. 13, No. 575, Ed. 1 Thursday, April 30, 2009
Weekly newspaper from Lexington, Texas that includes local, state, and national news along with advertising.
Date:
April 30, 2009
Creator:
Terrell, Cindy
Object Type:
Newspaper
System:
The Portal to Texas History
Lexington Leader (Lexington, Tex.), Vol. 13, No. 580, Ed. 1 Thursday, June 4, 2009
Weekly newspaper from Lexington, Texas that includes local, state, and national news along with advertising.
Date:
June 4, 2009
Creator:
Terrell, Cindy
Object Type:
Newspaper
System:
The Portal to Texas History
Characterization of Sediments from the Soil Desiccation Pilot Test (SDPT) Site in the BC Cribs and Trenches Area
This technical report documents the results of laboratory geochemical and hydrologic measurements of sediments collected from new borehole 299-E13-65 (C7047) and comparison of the results with those of nearby borehole 299-13E-62 (C5923) both drilled in the BC Cribs and Trenches Area. The total and water-leachable concentrations of key contaminants will be used to update contaminant-distribution conceptual models and to provide more data for improving baseline risk predictions and remedial alternative selections. Improved understanding of subsurface conditions and methods to remediate these principal contaminants can be also used to evaluate the application of specific technologies to other contaminants across the Hanford Site.
Date:
September 25, 2009
Creator:
Um, Wooyong; Truex, Michael J.; Valenta, Michelle M.; Iovin, Cristian; Kutnyakov, Igor V.; Chang, Hyun-shik et al.
Object Type:
Report
System:
The UNT Digital Library
The New Role of the Microchemostat in the Bioengineering Revolution
None
Date:
May 6, 2009
Creator:
Balagadde, F. K.
Object Type:
Article
System:
The UNT Digital Library
Deliberative Democracy, Divided Societies, and the Case of Appalachia
Theories of deliberative democracy, which emphasize open-mindedness and cooperative dialogue, confront serious challenges in deeply divided political populations constituted by polarized citizens unwilling to work together on issues they collectively face. The case of mountaintop removal coal mining in Appalachia makes this clear. In my thesis, I argue that such empirical challenges are serious, yet do not compromise the normative desirability of deliberative democracy because communicative mechanisms can help transform adversarial perspectives into workable, deliberative ones. To realize this potential in divided societies, mechanisms must focus on healing and reconciliation, a point under-theorized by deliberativists who do not take seriously enough the feminist critique of public-private dualisms that illuminates political dimensions of such embodied processes. Ultimately, only a distinctly two-stage process of public deliberation in divided populations, beginning with mechanisms for healing and trust building, will give rise to the self-transformation necessary for second-stage deliberation aimed at collectively binding decisions.
Date:
August 2009
Creator:
Tidrick, Charlee
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Year-round observations of carbon biomass and flux variability in the Southern Ocean
Three Carbon Explorer (CE) floats profiling to kilometer depths in the Southern Ocean tracked dawn-dusk variations of mixing/stratification, particulate organic carbon (POC), and light scattering and sedimentation at 100, 250, and 800 m continuously from January 2002 to April 2003. Data were analyzed in conjunction with contemporaneous satellite winds and chlorophyll and derived subsurface light fields. The CE deployed at 66{sup o}S 172{sup o}W operated in the ice edge zone in absence of light. Two CEs deployed at 55{sup o}S 172{sup o}W recorded wintertime mixing to {approx}400 m, yet observed very different bloom dynamics and sedimentation the following spring. Four hypotheses are explored. The strongest is that shallow transient stratification of the deep winter mixed layer to shallower than photosynthetic critical depth occurred more frequently in the non-bloom/higher sedimentation case. The lower particle export to 800 m under the bloom was hypothesized to be due to higher interception of sinking carbon by a relatively starved over wintering zooplankton population. In the Southern Ocean surface phytoplankton biomass may counter indicate particle flux at kilometer depths.
Date:
February 1, 2009
Creator:
Bishop, James K.B. & Wood, Todd
Object Type:
Article
System:
The UNT Digital Library
Always Painting the Future: Utopian Desire and the Women's Movement in Selected Works by United States Female Writers at the Turn of the Twentieth Century
This study explores six utopias by female authors written at the turn of the twentieth century: Mary Bradley Lane's Mizora (1881), Alice Ilgenfritz Jones and Ella Merchant's Unveiling Parallel (1893), Eloise O. Richberg's Reinstern (1900), Lena J. Fry's Other Worlds (1905), Charlotte Perkins Gilman's Herland (1915), and Martha Bensley Bruère's Mildred Carver, USA (1919). While the right to vote had become the central, most important point of the movement, women were concerned with many other issues affecting their lives. Positioned within the context of the late nineteenth century women's rights movement, this study examines these "sideline" concerns of the movement such as home and gender-determined spheres, motherhood, work, marriage, independence, and self-sufficiency and relates them to the transforming character of female identity at the time. The study focuses primarily on analyzing the expression of female historical desire through utopian genre and on explicating the contradictory nature of utopian production.
Date:
August 2009
Creator:
Balic, Iva
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Developing a Wildlife Tracking Extension for ArcGIS
Wildlife tracking is an essential task to gain better understanding of the migration pattern and use of space of the wildlife. Advances in computer technology and global positioning systems (GPS) have lowered costs, reduced processing time, and improved accuracy for tracking wild animals. In this thesis, a wildlife tracking extension is developed for ArcGIS 9.x, which allows biologists and ecologists to effectively track, visualize and analyze the movement patterns of wild animals. The extension has four major components: (1) data import; (2) tracking; (3) spatial and temporal analysis; and (4) data export. Compared with existing software tools for wildlife tracking, the major features of the extension include: (1) wildlife tracking capabilities using a dynamic data layer supported by a file geodatabase with 1 TB storage limit; (2) spatial clustering of wildlife locations; (3) lacunarity analysis of one-dimensional individual animal trajectories and two-dimensional animal locations for better understanding of animal movement patterns; and (4) herds evolvement modeling and graphic representation. The application of the extension is demonstrated using simulated data, test data collected by a GPS collar, and a real dataset collected by ARGOS satellite telemetry for albatrosses in the Pacific Ocean.
Date:
May 2009
Creator:
Chen, Cai
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Jewish Herald-Voice (Houston, Tex.), Vol. 101, No. 35, Ed. 1 Thursday, November 12, 2009
Weekly Jewish newspaper from Houston, Texas that includes local, state and national news along with extensive advertising.
Date:
November 12, 2009
Creator:
Samuels, Jeanne F.
Object Type:
Newspaper
System:
The Portal to Texas History