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Laser Safety Evaluation of the MILES and Mini MILES Laser Emitting Components
Laser safety evaluation and output emission measurements were performed (during October and November 2001) on SNL MILES and Mini MILES laser emitting components. The purpose, to verify that these components, not only meet the Class 1 (eye safe) laser hazard criteria of the CDRH Compliance Guide for Laser Products and 21 CFR 1040 Laser Product Performance Standard; but also meet the more stringent ANSI Std. z136.1-2000 Safe Use of Lasers conditions for Class 1 lasers that govern SNL laser operations. The results of these measurements confirmed that all of the Small Arms Laser Transmitters, as currently set (''as is''), meet the Class 1 criteria. Several of the Mini MILES Small Arms Transmitters did not. These were modified and re-tested and now meet the Class 1 laser hazard criteria. All but one System Controllers (hand held and rifle stock) met class 1 criteria for single trigger pulls and all presented Class 3a laser hazard levels if the trigger is held (continuous emission) for more than 5 seconds on a single point target. All units were Class 3a for ''aided'' viewing. These units were modified and re-tested and now meet the Class 1 hazard criteria for both ''aided'' as well as ''unaided'' …
Date:
February 2, 2002
Creator:
AUGUSTONI, ARNOLD L.
Object Type:
Report
System:
The UNT Digital Library
Genomics-based selection and functional characterization of triterpene glycosyltransferases from the model legume Medicago truncatula
Article on genomics-based selection and functional characterization of triterpene glycosyltransferases from the model legume Medicago truncatula.
Date:
February 2, 2005
Creator:
Achnine, Lahoucine; Huhman, David; Farag, Mohamed A.; Sumner, Lloyd W.; Blount, Jack W. & Dixon, R. A.
Object Type:
Article
System:
The UNT Digital Library
Electroweak physics: measurement of w gamma and z gamma production in pp-bar collisions at s**(1/2) = 1.96 tev
The Standard Model predictions for W{gamma} and Z{gamma} production are tested using an integrated luminosity of 200 pb{sup -1} of p{bar p} collision data collected at the Collider Detector at Fermilab. The cross sections are measured by selecting leptonic decays of the W and Z bosons, and photons with transverse energy E{sub T} > 7 GeV that are well separated from leptons. The production cross sections and kinematic distributions for the W{gamma} and Z{gamma} data are compared to SM predictions.
Date:
February 2, 2005
Creator:
Acosta, D.
Object Type:
Report
System:
The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 21, No. 5, Ed. 1 Thursday, February 2, 2006
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
February 2, 2006
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
From Knowledge, Knowability and the Search for Objective Randomness to a New Vision of Complexity
Paper discussing knowledge, knowability, and the search for objective randomness to a new vision of complexity.
Date:
February 2, 2008
Creator:
Allegrini, Paolo; Giuntoli, Martina; Grigolini, Paolo & West, Bruce J.
Object Type:
Paper
System:
The UNT Digital Library
2008 B20 Survey Results
Describes results of a sample survey of the quality of B20, a biodiesel blend, collected from U.S. public pumps and fleets as part of a joint effort by NREL, the NBB, and engine manufacturers.
Date:
February 2, 2009
Creator:
Alleman, T. L. & McCormick, R. L.
Object Type:
Presentation
System:
The UNT Digital Library
MOSAIC: a new wavefront metrology
MOSAIC is a new wavefront metrology that enables complete wavefront characterization from print or aerial image based measurements. Here we describe MOSAIC and verify its utility with a model-based proof of principle.
Date:
February 2, 2009
Creator:
Anderson, Christopher & Naulleau, Patrick
Object Type:
Article
System:
The UNT Digital Library
Femtosecond, High-Brightness Electron Beam Generation and Advanced Diagnosis
This document serves as the final report for LDRD project number 04-LW-031, in which we created subpicosecond length, kilo-amp peak current electron beams with the 100 MeV electron/positron linac, using a novel technique designed to produce ultra-short bunch lengths while maintaining the high brightness produced by the S-band photoinjector. In addition, a diagnostic to measure the temporal distribution of the beam was investigated, as conventional pulse length measurement techniques do not apply to extremely short pulses. The creation and diagnosis of beams with both femtosecond length and high transverse brightness is of major concern to next generation acceleration and radiation production experiments. This work leveraged the previous investment in the PLEIADES facility and it's ability to produce high brightness electron beams. In addition, the ultra-short electron pulses generated by this work have been used in conjunction with the PLEIADES X-ray source to produce sub-picosecond, high-brightness X-ray pulses.
Date:
February 2, 2005
Creator:
Anderson, S G; Brown, W J; Tremaine, A M; Kuba, J; Hartemann, F V & Fittinghoff, D N
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 105, No. 275, Ed. 1 Monday, February 2, 2004
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 2, 2004
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 106, No. 256, Ed. 1 Wednesday, February 2, 2005
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 2, 2005
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Aging and Rejuvenation with Fractional Derivatives
Article on aging and rejuvenation with fractional derivatives.
Date:
February 2, 2008
Creator:
Aquino, Gerardo; Bologna, Mauro; Grigolini, Paolo & West, Bruce J.
Object Type:
Paper
System:
The UNT Digital Library
Exploring little Higgs models with ATLAS at the LHC
We discuss possible searches for the new particles predicted by Little Higgs Models at the LHC. By using a simulation of the ATLAS detector, we demonstrate how the predicted quark, gauge bosons and additional Higgs bosons can be found and estimate the mass range over which their properties can be constrained.
Date:
February 2, 2004
Creator:
Azuelos, G.; Benslama, K.; Costanzo, D.; Couture, G.; Garcia, J.E.; Hinchliffe, I.G. et al.
Object Type:
Article
System:
The UNT Digital Library
Conceptual Models of Flow through a Heterogeneous, Layered Vadose Zone under a Percolation Pond
Understanding how water and solutes move through the vadose zone is necessary to make effective remedial action decisions where contaminants were spilled or leaked at the ground surface or were buried in shallow land-disposal sites. In layered, heterogeneous systems, high contrasts in hydraulic conductivity can lead to formation of perched water zones, and enhanced lateral spread of contamination. Two conceptual models are considered solute for migration through the vadose zone. In the diffuse flow conceptual model, perched water zones accumulate until the head over the perching layer becomes sufficient to drive the infiltration through the perching layer. In the preferential flow conceptual model, perched water moves laterally until a path around the perching layer is encountered. Preferential flow paths can enhance contaminant migration because greater moisture saturation leads to higher advective velocities, and the preferential flow paths bypass low permeability layers with higher sorption capacity. Monitoring wells and instrumented boreholes were installed around a newly constructed industrial-waste percolation pond and an ephemeral river that lie over a 150-m-thick layered vadose zone. Background data gathered before discharge to the pond began show the presence of at least one, and possibly two, deep perched zones. The shallower zone, at approximately 45-m below …
Date:
February 2, 2004
Creator:
Baker, Kristine; Hull, Larry; Bennett, Jesse; Ansley, Shannon & Heath, Gail
Object Type:
Report
System:
The UNT Digital Library
Group Representations and Multinomial Combinatorics of the Icosahedral Symmetry
The icosahedral symmetry is one of the most intriguing symmetries, as it not only presents challenge but it appears in many fullerenes and high energetic materials such as the dodecahedral N{sub 20}. We have considered the combinatorics of all irreducible representations of the icosahedral symmetry for a number of multinomial partitions for vertex, face and edge colorings in this work. We have constructed the combinatorial tables for all irreducible representations for various multinomial partitions of colorings for the vertices, edge and faces of the icosahedron. These techniques should have important applications to enumerations and spectroscopy of fullerenes and high-energy materials such as N{sub 20}.
Date:
February 2, 2004
Creator:
Balasubramanian, K
Object Type:
Article
System:
The UNT Digital Library
Non-rigid Group Theory, Tunneling Splittings and Nuclear Spin Statistics of Water Pentamer: (H2O5)
The character table of the fully non-rigid water pentamer, (H{sub 2}O){sub 5} is derived for the first time. The group of all feasible permutations is the wreath product group S{sub 5}[S{sub 2}] and it consists of 3840 operations divided into 36 conjugacy classes and irreducible representations. We have shown that the full character table can be constructed using elegant matrix type generator algebra. The character table has been applied to the water pentamer by obtaining the nuclear spin statistical weights of the rovibronic levels and tunneling splittings of the fully non-rigid pentamer. We have also obtained the statistical weights and tunneling splittings of a semi-rigid deuterated pentamer that exhibits pseudo rotation with an averaged C{sub 5h}(G{sub 10}) symmetry used in the assignment of vibration-rotation-tunneling spectra . The correlation tables have been constructed for the semirigid (G{sub 10}) to non-rigid (G{sub 3840}) groups for the rotational levels and tunneling levels. The nuclear spin statistical weights have also been derived for both the limits.
Date:
February 2, 2004
Creator:
Balasubramanian, K
Object Type:
Article
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 30, No. 14, Ed. 1 Friday, February 2, 2001
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
February 2, 2001
Creator:
Baldwin, Alisha
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Measurement of Black Carbon and Particle Number Emission Factors from Individual Heavy-Duty Trucks
Emission factors for black carbon (BC) and particle number (PN) were measured from 226 individual heavy-duty (HD) diesel-fueled trucks driving through a 1 km-long California highway tunnel in August 2006. Emission factors were based on concurrent increases in BC, PN, and CO{sub 2}B concentrations (measured at 1 Hz) that corresponded to the passage of individual HD trucks. The distributions of BC and PN emission factors from individual HD trucks are skewed, meaning that a large fraction of pollution comes from a small fraction of the in-use vehicle fleet. The highest-emitting 10% of trucks were responsible for {approx} 40% of total BC and PN emissions from all HD trucks. BC emissions were log-normally distributed with a mean emission factor of 1.7 g kg {sup -1} and maximum values of {approx} 10 g kg{sup -1}. Corresponding values for PN emission factors were 4.7 x 10{sup 15} and 4 x 10{sup 16} kg{sup -1}. There was minimal overlap among high-emitters of these two pollutants: only 1 of the 226 HD trucks measured was found to be among the highest 10% for both BC and PN. Monte Carlo resampling of the distribution of BC emission factors observed in this study revealed that uncertainties (1{sigma}) …
Date:
February 2, 2009
Creator:
Ban-Weiss, George A.; Lunden, Melissa M.; Kirchstetter, Thomas W. & Harley, Robert A.
Object Type:
Article
System:
The UNT Digital Library
Knowledge Representation Issues in Semantic Graphs for Relationship Detection
An important task for Homeland Security is the prediction of threat vulnerabilities, such as through the detection of relationships between seemingly disjoint entities. A structure used for this task is a ''semantic graph'', also known as a ''relational data graph'' or an ''attributed relational graph''. These graphs encode relationships as typed links between a pair of typed nodes. Indeed, semantic graphs are very similar to semantic networks used in AI. The node and link types are related through an ontology graph (also known as a schema). Furthermore, each node has a set of attributes associated with it (e.g., ''age'' may be an attribute of a node of type ''person''). Unfortunately, the selection of types and attributes for both nodes and links depends on human expertise and is somewhat subjective and even arbitrary. This subjectiveness introduces biases into any algorithm that operates on semantic graphs. Here, we raise some knowledge representation issues for semantic graphs and provide some possible solutions using recently developed ideas in the field of complex networks. In particular, we use the concept of transitivity to evaluate the relevance of individual links in the semantic graph for detecting relationships. We also propose new statistical measures for semantic graphs …
Date:
February 2, 2005
Creator:
Barthelemy, M; Chow, E & Eliassi-Rad, T
Object Type:
Article
System:
The UNT Digital Library
[Kennethia Wilson on the court during ULL game]
Photograph of Kennethia Wilson, Sociology senior and member of the women's basketball team at UNT, on the court during a game against the University of Louisiana at Lafayette. Wilson can be seen in the center of the photograph, facing to the left of the camera. She is pointing straight ahead of herself with her right hand and appears to be yelling. A referee is standing next to Wilson, holding a basketball.
Date:
February 2, 2006
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
Ferroelectric and piezoelectric properties of MOCVD Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}PbTiO{sub 3} epitaxial thin films
The authors have grown epitaxial Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3} (PMN) and (1-x)(Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3})-x(PBTiO{sub 3})(PMN-PT)thin films by metalorganic chemical vapor deposition at 700 -- 780 C on (100) SrTiO{sub 3} and SrRuO{sub 3}/SrTiO{sub 3} substrates. The zero-bias permittivity and loss measured at room temperature and 10 kHz for 220 nm thick pure PMN films were 900 and 1.5%, respectively. For PMN-PT films the small-signal permittivity ranged from 1000 to 1500 depending on deposition conditions and Ti content; correspondingly low values for the zero-bias dielectric loss between 1 and 5% were determined for all specimens. For PMN-PT with x of approximately 0.30--0.35, polarization hysteresis with P{sub r}{approximately}18{mu}C/cm{sup 2} was obtained. Initial piezoresponse data are discussed.
Date:
February 2, 2000
Creator:
Baumann, P. K.; Bai, G. R.; Streiffer, S. K.; Ghosh, K.; Auciello, O.; Stemmer, S. et al.
Object Type:
Article
System:
The UNT Digital Library
Government Access to Phone Calling Activity and Related Records: Legal Authorities
This report summarizes legal authorities regarding access by the government, for either foreign intelligence or law enforcement purposes, to information related to telephone calling patterns or practices. Where pertinent, it also discusses statutory prohibitions against accessing or disclosing such information, along with relevant exceptions to those prohibitions.
Date:
February 2, 2009
Creator:
Bazan, Elizabeth B.; Liu, Edward C. & Stevens, Gina
Object Type:
Report
System:
The UNT Digital Library
The “Farm Bill” in Brief
This report briefly discusses federal farm support, food assistance, agricultural trade, marketing, and rural development policies are governed by a variety of separate laws. Many of these laws periodically have been evaluated, revised, and renewed through an omnibus, multi-year farm bill. These policies can be and sometimes are modified through free-standing authorizing legislation, or as part of other laws.
Date:
February 2, 2007
Creator:
Becker, Geoffrey S.
Object Type:
Report
System:
The UNT Digital Library
U.S. Food and Agricultural Imports: Safeguards and Selected Issues
The issue was explored at numerous congressional hearings in 2007 and 2008, and Members of Congress introduced a variety of bills to modify or overhaul the current system. Some sought broad reforms in the U.S. Food and Drug Administration's (FDA's) oversight of both food and drug safety, including of imports.
Date:
February 2, 2009
Creator:
Becker, Geoffrey S.
Object Type:
Report
System:
The UNT Digital Library
Appropriations and Authorization for FY2002: Defense
Appropriations are one part of a complex federal budget process that includes budget resolutions, appropriations (regular, supplemental, and continuing) bills, rescissions, and budget reconciliation bills. This report is a guide to one of the 13 regular appropriations bills that Congress considers each year. It is designed to supplement the information provided by the House and Senate Defense Appropriations Subcommittees. It summarizes the current legislative status of the bill, its scope, major issues, funding levels, and related legislative activity. The report lists the key CRS staff relevant to the issues covered and related CRS products.
Date:
February 2, 2002
Creator:
Belasco, Amy & Daggett, Stephen
Object Type:
Report
System:
The UNT Digital Library