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Backflow Protection on Water-Based Fire Protection Systems
This publication provides information and guidelines on backflow protection for water-based fire protection systems.
Date:
October 2008
Creator:
Texas Commission on Environmental Quality. Water Supply Division.
Object Type:
Pamphlet
System:
The Portal to Texas History
Bacterial quorum sensing and nitrogen cycling in rhizosphere soil
Plant photosynthate fuels carbon-limited microbial growth and activity, resulting in increased rhizosphere nitrogen (N)-mineralization. Most soil organic N is macromolecular (chitin, protein, nucleotides); enzymatic depolymerization is likely rate-limiting for plant N accumulation. Analyzing Avena (wild oat) planted in microcosms containing sieved field soil, we observed increased rhizosphere chitinase and protease specific activities, bacterial cell densities, and dissolved organic nitrogen (DON) compared to bulk soil. Low-molecular weight DON (<3000 Da) was undetectable in bulk soil but comprised 15% of rhizosphere DON. Extracellular enzyme production in many bacteria requires quorum sensing (QS), cell-density dependent group behavior. Because proteobacteria are considered major rhizosphere colonizers, we assayed the proteobacterial QS signals acyl-homoserine lactones (AHLs), which were significantly increased in the rhizosphere. To investigate the linkage between soil signaling and N cycling, we characterized 533 bacterial isolates from Avena rhizosphere: 24% had chitinase or protease activity and AHL production; disruption of QS in 7 of 8 eight isolates disrupted enzyme activity. Many {alpha}-Proteobacteria were newly found with QS-controlled extracellular enzyme activity. Enhanced specific activities of N-cycling enzymes accompanied by bacterial density-dependent behaviors in rhizosphere soil gives rise to the hypothesis that QS could be a control point in the complex process of rhizosphere N-mineralization.
Date:
October 1, 2008
Creator:
DeAngelis, K. M.; Lindow, S. E. & Firestone, M. K.
Object Type:
Article
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 88, No. 273, Ed. 1 Wednesday, October 1, 2008
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
October 1, 2008
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
Beam Transport of 4 GeV Protons from AGS to the Proton Interrogation Target of the Neutrino Line (Z_line) and Effect of the Air on the Transported Beam
As part of the preparation for the Proton Interrogation Experiment, we have calculated the beam optics for the transport of 4 GeV protons, from the AGS extraction point, to the 'Cross-Section Target Wheel 1' and to the 'Proton Interrogation Target'. In this technical note we present three possible beam-transports each corresponding to a particular Fast Extracted Beam W B setup of the AGS. In addition we present results on the effect of the atmospheric air, (which fills the drift space of the last 100 [m] of the transport line), on the size of the beam, at two locations along the drift space, one location at the middle of the drift space and the other at the end where the 'Proton Interrogation Target' is placed. All the beam transports mentioned above require the removal of the WD1 dipole magnet, which is the first magnet of the W-line, because it acts as a limiting beam aperture, and the magnet is not used in the beam transport. An alternative solution of a beam transport, which does not require the removal of the WD1 magnet, is also presented. In this solution, which models the transport line using the TURTLE computer code[7], the vertical beam …
Date:
October 1, 2008
Creator:
Tsoupas, N.; Ahrens, L.; Pile, P.; Thieberger, P. & Murray, M. M.
Object Type:
Report
System:
The UNT Digital Library
Beam Transport of 4 GeV Protons from AGS to the Proton Interrogation Target of the Neutrino line (Z_line) and Effect of the Air on the Transported Beam
N/A
Date:
October 1, 2008
Creator:
N., Tsoupas; Ahrens, L.; Pile, P.; Thieberger, P. & Murray, M.M.
Object Type:
Report
System:
The UNT Digital Library
Benefits and technological challenges in the implementation of TiO2-based ultraviolet photocatalytic oxidation (UVPCO) air cleaners
Heating, ventilating, and cooling classrooms in California consume substantial electrical energy. Indoor air quality (IAQ) in classrooms affects student health and performance. In addition to airborne pollutants that are emitted directly by indoor sources and those generated outdoors, secondary pollutants can be formed indoors by chemical reaction of ozone with other chemicals and materials. Filters are used in nearly all classroom heating, ventilation and air-conditioning (HVAC) systems to maintain energy-efficient HVAC performance and improve indoor air quality; however, recent evidence indicates that ozone reactions with filters may, in fact, be a source of secondary pollutants. This project quantitatively evaluated ozone deposition in HVAC filters and byproduct formation, and provided a preliminary assessment of the extent to which filter systems are degrading indoor air quality. The preliminary information obtained will contribute to the design of subsequent research efforts and the identification of energy efficient solutions that improve indoor air quality in classrooms and the health and performance of students.
Date:
October 1, 2008
Creator:
Hodgson, Al; Destaillats, Hugo; Hotchi, Toshifumi & Fisk, William J.
Object Type:
Report
System:
The UNT Digital Library
A Biennial Report on the State's Position Classification Plan
Report of the Texas State Auditor's Office related to determining the competitiveness of the Position Classification Plan (Plan) with similar positions in the private and public sector, and whether changes to the Plan are needed.
Date:
October 2008
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
Biosynthesis and genetic engineering of proanthocyanidins and (iso)flavonoids
Article on biosynthesis and genetic engineering of proanthocyanidins and (iso)flavonoids.
Date:
October 2008
Creator:
Tian, Li; Pang, Yongzhen & Dixon, R. A.
Object Type:
Article
System:
The UNT Digital Library
Bootstrapping a Sustainable North American PEM Fuel Cell Industry: Could a Federal Acquisition Program Make a Difference?
The North American Proton Exchange Membrane (PEM) fuel cell industry may be at a critical juncture. A large-scale market for automotive fuel cells appears to be several years away and in any case will require a long-term, coordinated commitment by government and industry to insure the co-evolution of hydrogen infrastructure and fuel cell vehicles (Greene et al., 2008). The market for non-automotive PEM fuel cells, on the other hand, may be much closer to commercial viability (Stone, 2006). Cost targets are less demanding and manufacturers appear to be close, perhaps within a factor of two, of meeting them. Hydrogen supply is a significant obstacle to market acceptance but may not be as great a barrier as it is for hydrogen-powered vehicles due to the smaller quantities of hydrogen required. PEM fuel cells appear to be potentially competitive in two markets: (1) Backup power (BuP) supply, and (2) electrically-powered MHE (Mahadevan et al., 2007a, 2007b). There are several Original Equipment Manufacturers (OEMs) of PEM fuel cell systems for these applications but production levels have been quite low (on the order of 100-200 per year) and cumulative production experience is also limited (on the order of 1,000 units to date). As a …
Date:
October 1, 2008
Creator:
Greene, David L & Duleep, Dr. K. G.
Object Type:
Report
System:
The UNT Digital Library
Border Business Indicators, Volume 32, Number 10, October 2008
Monthly publication documenting statistics related to economic information in the Mexico-Texas border areas including types of border crossings, employment, customs revenues, and other related data.
Date:
October 2008
Creator:
Texas Center for Border Economic and Enterprise Development
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
BUILDING A NETWORK FOR NEUTRON SCATTERING EDUCATION
In a concerted effort supported by the National Science Foundation, the Department of Commerce, and the Department of Energy, the United States is rebuilding its leadership in neutron scattering capability through a significant investment in U.S. neutron scattering user facilities and related instrumentation. These unique facilities provide opportunities in neutron scattering to a broad community of researchers from academic institutions, federal laboratories, and industry. However, neutron scattering is often considered to be a tool for 'experts only' and in order for the U.S. research community to take full advantage of these new and powerful tools, a comprehensive education and outreach program must be developed. The workshop described below is the first step in developing a national program that takes full advantage of modern education methods and leverages the existing educational capacity at universities and national facilities. During March 27-28, 2008, a workshop entitled 'Building a Network for Neutron Scattering Education' was held in Washington, D.C. The goal of the workshop was to define and design a roadmap for a comprehensive neutron scattering education program in the United States. Successful implementation of the roadmap will maximize the national intellectual capital in neutron sciences and will increase the sophistication of research questions …
Date:
October 1, 2008
Creator:
Pynn, Roger; Baker, Shenda Mary; Louca, Despo A; McGreevy, Robert L; Ekkebus, Allen E; Kszos, Lynn A et al.
Object Type:
Report
System:
The UNT Digital Library
Building America Best Practices Series: Guide to Determining Climate Regions by County
This document describes the eight climate region designations used by the US Department of Energy Building America Program. In addition to describing the climate zones, the document includes a complete list of every county in the United States and their climate region designations. The county lists are grouped by state. The doucment is intended to assist builders to easily identify what climate region they are building in and therefore which climate-specific Building America best practices guide would be most appropriate for them.
Date:
October 1, 2008
Creator:
Gilbride, Theresa L.
Object Type:
Report
System:
The UNT Digital Library
Capturing CO2 via reactions in nanopores.
This one-year exploratory LDRD aims to provide fundamental understanding of the mechanism of CO2 scrubbing platforms that will reduce green house gas emission and mitigate the effect of climate change. The project builds on the team member's expertise developed in previous LDRD projects to study the capture or preferential retention of CO2 in nanoporous membranes and on metal oxide surfaces. We apply Density Functional Theory and ab initio molecular dynamics techniques to model the binding of CO2 on MgO and CaO (100) surfaces and inside water-filled, amine group functionalized silica nanopores. The results elucidate the mechanisms of CO2 trapping and clarify some confusion in the literature. Our work identifies key future calculations that will have the greatest impact on CO2 capture technologies, and provides guidance to science-based design of platforms that can separate the green house gas CO2 from power plant exhaust or even from the atmosphere. Experimentally, we modify commercial MFI zeolite membranes and find that they preferentially transmit H2 over CO2 by a factor of 34. Since zeolite has potential catalytic capability to crack hydrocarbons into CO2 and H2, this finding paves the way for zeolite membranes that can convert biofuel into H2 and separate the products all …
Date:
October 1, 2008
Creator:
Leung, Kevin; Nenoff, Tina Maria; Criscenti, Louise Jacqueline; Tang, Z & Dong, J. H.
Object Type:
Report
System:
The UNT Digital Library
Characterising and modelling the excavation damaged zone (EDZ) in crystalline rock in the context of radioactive waste disposal
This paper describes current knowledge about the nature of and potential for thermo-hydro-mechanical-chemical modelling of the Excavation Damaged Zone (EDZ) around the excavations for an underground radioactive waste repository. In the first part of the paper, the disturbances associated with excavation are explained, together with reviews of Workshops that have been held on the subject. In the second part of the paper, the results of a DECOVALEX research programme on modelling the EDZ are presented. Four research teams used four different models to simulate the complete stress-strain curve for Avro granite from the Swedish Aespoe Hard Rock Laboratory. Subsequent research extended the work to computer simulation of the evolution of the repository using a 'wall block model' and a 'near-field model'. This included assessing the evolution of stress, failure and permeability and time dependent effects during repository evolution. As discussed, all the computer models are well suited to sensitivity studies for evaluating the influence of their respective supporting parameters on the complete stress-strain curve for rock and for modelling the EDZ.
Date:
October 1, 2008
Creator:
Hudson, J. A.; Backstrom, A.; Rutqvist, J.; Jing, L.; Backers, T.; Chijimatsu, M. et al.
Object Type:
Article
System:
The UNT Digital Library
Characterization of the self magnetic pinch diode at high voltages for flash radiography.
The Sandia Laboratories Advanced Radiographic Technologies Department, in collaboration with the United Kingdom Atomic Weapons Establishment, has been conducting research into the development of the Self-Magnetic-Pinched diode as an x-ray source suitable for flash radiographic experiments. We have demonstrated that this source is capable of meeting and exceeding the initial requirements of 250 rads (measured at one meter) with a 2.75 mm source spot-size. Recent experiments conducted on the RITS-6 accelerator have demonstrated the ability of this diode to meet intermediate requirements with a sub 3 mm source spot size and a dose in excess of 400 rads at one meter.
Date:
October 1, 2008
Creator:
Cordova, Steve Ray; Portillo, Salvador; Oliver, Bryan Velten; Threadgold, James R. (Atomic Weapons Establishment Aldermaston, Reading Berkshire, U.K.); Crotch, Ian (Atomic Weapons Establishment Aldermaston, Reading Berkshire, U.K.) & Ziska, Derek Raymond
Object Type:
Report
System:
The UNT Digital Library
CHARICE version 1.1 update.
CHARICE (CHARacteristics-based inverse analysis of Isentropic Compression Experiments) is a computer application, previously documented in SAND2007-4948, that analyzes velocity waveform data from ramp-wave experiments to determine a material's quasi-isentropic loading response in stress and density using an iterative characteristics-based approach. This short report documents only the changes in CHARICE release version 1.1 relative to release version 1.0, and is not intended to stand alone. CHARICE version 1.1 corrects an error in the algorithm of the method, fixes several bugs, improves robustness and performance, provides more useful error descriptions, and adds a number of minor features.
Date:
October 1, 2008
Creator:
Davis, Jean-Paul
Object Type:
Report
System:
The UNT Digital Library
Charmless b-hadrons decays at CDF
We present CDF results on the branching fractions and time-integrated direct CP asymmetries for Bd, Bs and Lb decay modes into pairs of charmless charged hadrons (pions, kaons and protons). The data-set for these measurements amounts to 1fb{sup -1} of p{bar p} collisions at a center of mass energy 1.96TeV. We report on the first observation of the Bs->Kpi, Lb-ppi and Lb->pK decay modes and on the measurement of their branching fractions and direct CP asymmetries.
Date:
October 1, 2008
Creator:
Morello, Michael Joseph
Object Type:
Article
System:
The UNT Digital Library
Cherokeean Herald (Rusk, Tex.), Vol. 159, No. 32, Ed. 1 Wednesday, October 1, 2008
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
October 1, 2008
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
Children with Special Health Care Needs: Newsletter for Families, October 2008
Bilingual newsletter from the Texas Department of State Health Services providing information on health care for children with special needs, including resources for medical help and community services.
Date:
October 2008
Creator:
Texas. Department of State Health Services.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
China Energy Databook -- User Guide and Documentation, Version 7.0
Since 2001, China's energy consumption has grown more quickly than expected by Chinese or international observers. This edition of the China Energy Databook traces the growth of the energy system through 2006. As with version six, the Databook covers a wide range of energy-related information, including resources and reserves, production, consumption, investment, equipment, prices, trade, environment, economy, and demographic data. These data provide an extensive quantitative foundation for understanding China's growing energy system. In addition to providing updated data through 2006, version seven includes revised energy and GDP data back to the 1990s. In the 2005 China Energy Statistical Yearbook, China's National Bureau of Statistics (NBS) published revised energy production, consumption, and usage data covering the years 1998 to 2003. Most of these revisions related to coal production and consumption, though natural gas data were also adjusted. In order to accommodate underestimated service sector growth, the NBS also released revised GDP data in 2005. Beyond the inclusion of historical revisions in the seventh edition, no attempt has been made to rectify known or suspected issues in the official data. The purpose of this volume is to provide a common basis for understanding China's energy system. In order to broaden understanding …
Date:
October 1, 2008
Creator:
Fridley, Ed., David; Aden, Ed., Nathaniel; Lu, Ed., Hongyou & Zheng, Ed., Nina
Object Type:
Report
System:
The UNT Digital Library
.China’s Policies and Actions for Addressing Climate Change
.China has formulated and implemented its national climate change programme, and adopted a series of policies and measures in this regard. China addresses climate change in the context of implementing sustainable development strategy, combined with its accelerated steps to build a resource-conserving and environmental-friendly society and an innovation-oriented country.
Date:
October 1, 2008
Creator:
Information Office of the State Council of the People’s Republic of China
Object Type:
Text
System:
The UNT Digital Library
The Christian Chronicle (Oklahoma City, Okla.), Vol. 65, No. 10, Ed. 1, October 2008
Monthly newspaper from Oklahoma City, Oklahoma that includes news and information about the Churches of Christ along with advertising.
Date:
October 2008
Creator:
McMillon, Lynn
Object Type:
Newspaper
System:
The Portal to Texas History
Clean Cities: Ethanol Basics, Fact Sheet, October 2008
Document answers frequently asked questions about ethanol as a transportation fuel, including those on production, environmental effects, and vehicles.
Date:
October 1, 2008
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Clean Cities: Natural Gas (Fact Sheet)
Document answers frequently asked questions about natural gas as a transportation fuel.
Date:
October 1, 2008
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library