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Modified magnetic ground state in NiMn2O4 thin films

Description: We demonstrate the stabilization of a magnetic ground state in epitaxial NiMn2O4 (NMO) thin films not observed in their bulk counterpart. Bulk NMO exhibits a magnetic transition from a paramagnetic phase to a collinear ferrimagnetic moment configuration below 110 K and to a canted moment configuration below 70 K. By contrast, as-grown NMO films exhibit a single magnetic transition at 60 K and annealed films exhibit the magnetic behavior found in bulk. Cation inversion and epitaxial strain are r… more
Date: August 3, 2010
Creator: Nelson-Cheeseman, B. B.; Chopdekar, R. V.; Toney, M. F.; Arenholz, E.; Suzuki, Y. & Iwata, J.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Sensor Configuration Selection for Discrete-Event Systems under Unreliable Observations

Description: Algorithms for counting the occurrences of special events in the framework of partially-observed discrete event dynamical systems (DEDS) were developed in previous work. Their performances typically become better as the sensors providing the observations become more costly or increase in number. This paper addresses the problem of finding a sensor configuration that achieves an optimal balance between cost and the performance of the special event counting algorithm, while satisfying given obser… more
Date: August 1, 2010
Creator: Lin, Wen-Chiao; Yoo, Tae-Sic & Garcia, Humberto E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Low-frequency RF Coupling To Unconventional (Fat Unbalanced) Dipoles

Description: The report explains radio frequency (RF) coupling to unconventional dipole antennas. Normal dipoles have thin equal length arms that operate at maximum efficiency around resonance frequencies. In some applications like high-explosive (HE) safety analysis, structures similar to dipoles with ''fat'' unequal length arms must be evaluated for indirect-lightning effects. An example is shown where a metal drum-shaped container with HE forms one arm and the detonator cable acts as the other. Even if t… more
Date: December 7, 2010
Creator: Ong, M. M.; Brown, C. G.; Perkins, M. P.; Speer, R. D. & Javedani, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Clean and Efficient Diesel Engine

Description: Task 1 was to design study for fuel-efficient system configuration. The objective of task 1 was to perform a system design study of locomotive engine configurations leading to a 5% improvement in fuel efficiency. Modeling studies were conducted in GT-Power to perform this task. GT-Power is an engine simulation tool that facilitates modeling of engine components and their system level interactions. It provides the capability to evaluate a variety of engine technologies such as exhaust gas circul… more
Date: December 31, 2010
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessment of the 3430 Building Filtered Exhaust Stack Sampling Probe Location

Description: Pacific Northwest National Laboratory performed a demonstration to determine the acceptable location in which to place an air sampling probe for emissions monitoring for radionuclides in the exhaust air discharge from the new 3430 Building Filtered Exhaust Stack. The method was to adopt the results of a previously performed test series for a system of similar configuration, followed by a partial test on the actual system to verify the applicability of previously performed tests. The qualificati… more
Date: July 16, 2010
Creator: Glissmeyer, John A. & Flaherty, Julia E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Controlled Hydrogen Fleet and Infrastructure Demonstration Project

Description: This program was undertaken in response to the US Department of Energy Solicitation DE-PS30-03GO93010, resulting in this Cooperative Agreement with the Ford Motor Company and BP to demonstrate and evaluate hydrogen fuel cell vehicles and required fueling infrastructure. Ford initially placed 18 hydrogen fuel cell vehicles (FCV) in three geographic regions of the US (Sacramento, CA; Orlando, FL; and southeast Michigan). Subsequently, 8 advanced technology vehicles were developed and evaluated by… more
Date: March 31, 2010
Creator: Staley, Dr. Scott
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

R&D ERL: HOM Absorbers

Description: Several future accelerator projects at the Relativistic Heavy Ion Collider (RHIC) are based on Energy Recovery Linacs (ERL) with high-charge high-current electron beams. Their stable operation mandates effective higher-order-mode (HOM) damping. The development of HOM dampers for these projects is pursued actively at this laboratory. A strong HOM damping was experimentally demonstrated both at room- and at superconducting- (SC) temperatures in a prototype R&D five-cell niobium SRF cavity wit… more
Date: January 1, 2010
Creator: Hahn, H.; Ben-Zvi, Ilan; Calaga, R.; Hammons, L.; Litvinenko, V. N. & Xu, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Resonant Vibrations Resulting from the Re-Engineering of a Constant-Speed 2-Bladed Turbine to a Variable-Speed 3-Bladed Turbine

Description: The CART3 (Controls Advanced Research Turbine, 3-bladed) at the National Wind Technology Center has recently been converted from a 2-bladed constant speed machine to a 3-bladed variable speed machine designed specically for controls research. The purpose of this conversion was to develop an advanced controls field-testing platform which has the more typical 3-bladed configuration. A result of this conversion was the emergence of several resonant vibrations, some of which initially prevented ope… more
Date: December 1, 2010
Creator: Fleming, P.; Wright, A. D. & Finersh, L. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Silo & HDF5 I/O Scaling Improvements on BG/P Systems

Description: Silo and HDF5 are I/O libraries used by many codes important to the LLNL's Weapons and Complex Integration (WCI) mission. In the past year, modest adjustments and tuning of Silo, HDF5 and the I/O configuration of the BG/P platform, Dawn, were undertaken. A key goal of this work was to improve I/O performance without requiring any changes in the application codes themselves. In particular, the application codes have been allowed to continue to use a simplified yet highly flexible I/O paradigm kn… more
Date: December 2, 2010
Creator: Collette, M R & Miller, M C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Analysis Efforts Supporting NSTX Upgrades

Description: The National Spherical Torus Experiment (NSTX) is a low aspect ratio, spherical torus (ST) configuration device which is located at Princeton Plasma Physics Laboratory (PPPL) This device is presently being updated to enhance its physics by doubling the TF field to 1 Tesla and increasing the plasma current to 2 Mega-amperes. The upgrades include a replacement of the centerstack and addition of a second neutral beam. The upgrade analyses have two missions. The first is to support design of new co… more
Date: November 29, 2010
Creator: H.Zhang, P. Titus, P. Rogoff, A.Zolfaghari, D. Mangra, M. Smith
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Passive and Active Radiation Measurements Capability at the INL Zero Power Physics Reactor (ZPPR) Facility

Description: The Zero Power Physics Reactor (ZPPR) facility is a Department of Energy facility located in the Idaho National Laboratory’s (INL) Materials and Fuels Complex. It contains various nuclear and non-nuclear materials that are available to support many radiation measurement assessments. User-selected, single material, nuclear and non-nuclear materials can be readily utilized with ZPPR clamshell containers with almost no criticality concerns. If custom, multi-material configurations are desired, the… more
Date: December 1, 2010
Creator: Neibert, Robert; Zabriskie, John; Knight, Collin & Jones, James L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Puget Sound Dissolved Oxygen Modeling Study: Development of an Intermediate-Scale Hydrodynamic Model

Description: The Washington State Department of Ecology contracted with Pacific Northwest National Laboratory to develop an intermediate-scale hydrodynamic and water quality model to study dissolved oxygen and nutrient dynamics in Puget Sound and to help define potential Puget Sound-wide nutrient management strategies and decisions. Specifically, the project is expected to help determine 1) if current and potential future nitrogen loadings from point and non-point sources are significantly impairing water q… more
Date: November 30, 2010
Creator: Yang, Zhaoqing; Khangaonkar, Tarang; Labiosa, Rochelle G. & Kim, Taeyun
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Demonstration Assessment of Light-Emitting Diode (LED) Roadway Lighting on Residential and Commercial Streets in Palo Alto, CA

Description: This report is part of a GATEWAY demonstration that replaced existing HPS streetlights with two different types of LED products and one induction product. Energy savings ranged from 6% to 44%.
Date: June 24, 2010
Creator: Myer, Michael; Kinzey, Bruce R. & Tam, Christine
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Stellarator Coil Design and Plasma Sensitivity

Description: The rich information contained in the plasma response to external magnetic perturbations can be used to help design stellarator coils more effectively. We demonstrate the feasibility by first devel- oping a simple, direct method to study perturbations in stellarators that do not break stellarator symmetry and periodicity. The method applies a small perturbation to the plasma boundary and evaluates the resulting perturbed free-boundary equilibrium to build up a sensitivity matrix for the importa… more
Date: November 3, 2010
Creator: Ku, Long-Poe & Boozer, Allen H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

CONCRETE REFLECTED ARRAYS OF U(93.2) METAL

Description: During the period from 1963 – 1973, experiments involving highly enriched uranium units were performed at the Oak Ridge National Laboratory Critical Experiments Facility to determine various critical configurations of three-dimensional arrays. The experiments formed a four-part series, and were reported by several different experimenters; the results of interest for this evaluation are those reported for the fourth experimentation, Critical Three-Dimensional Arrays of Neutron Interacting Units:… more
Date: September 1, 2010
Creator: Gorham, Mackenzie; Bess, John D.; Briggs, J. Blair; Dean, Virginia & Reed, Davis
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

GyPSuM: A Detailed Tomographic Model of Mantle Density and Seismic Wave Speeds

Description: GyPSuM is a tomographic model fo mantle seismic shear wave (S) speeds, compressional wave (P) speeds and detailed density anomalies that drive mantle flow. the model is developed through simultaneous inversion of seismic body wave travel times (P and S) and geodynamic observations while considering realistic mineral physics parameters linking the relative behavior of mantle properties (wave speeds and density). Geodynamic observations include the (up to degree 16) global free-air gravity field,… more
Date: March 30, 2010
Creator: Simmons, N A; Forte, A M; Boschi, L & Grand, S P
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Field-induced Gap and Quantized Charge Pumping in Nano-helix

Description: We propose several novel physical phenomena based on nano-scale helical wires. Applying a static electric field transverse to the helical wire induces a metal to insulator transition, with the band gap determined by the applied voltage. Similar idea can be applied to 'geometrically' constructing one-dimensional systems with arbitrary external potential. With a quadrupolar electrode configuration, the electric field could rotate in the transverse plane, leading to a quantized dc charge current p… more
Date: February 15, 2010
Creator: Qi, Xiao-Liang; /Stanford U., Phys. Dept. /Tsinghua U., Beijing; Zhang, Shou-Cheng & /Stanford U., Phys. Dept.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

STP-ECRTS - THERMAL AND GAS ANALYSES FOR SLUDGE TRANSPORT AND STORAGE CONTAINER (STSC) STORAGE AT T PLANT

Description: The Sludge Treatment Project (STP) is responsible for the disposition of sludge contained in the six engineered containers and Settler tank within the 105-K West (KW) Basin. The STP is retrieving and transferring sludge from the Settler tank into engineered container SCS-CON-230. Then, the STP will retrieve and transfer sludge from the six engineered containers in the KW Basin directly into a Sludge Transport and Storage Containers (STSC) contained in a Sludge Transport System (STS) cask. The S… more
Date: April 29, 2010
Creator: RD, CROWE; R, APTHORPE; SJ, LEE & MG, PLYS
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Process Knowledge Summary Report for Materials and Fuels Complex Contact-Handled Transuranic Debris Waste

Description: This Process Knowledge Summary Report summarizes the information collected to satisfy the transportation and waste acceptance requirements for the transfer of transuranic (TRU) waste between the Materials and Fuels Complex (MFC) and the Advanced Mixed Waste Treatment Project (AMWTP). The information collected includes documentation that addresses the requirements for AMWTP and the applicable portion of their Resource Conservation and Recovery Act permits for receipt and treatment of TRU debris … more
Date: February 1, 2010
Creator: Grant, R. P.; Crane, P. J.; Butler, S. & Henry, M. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Spin Hall effects for cold atoms in a light induced gauge potential

Description: We propose an experimental scheme to observe spin Hall effects with cold atoms in a light induced gauge potential. Under an appropriate configuration, the cold atoms moving in a spatially varying laser field experience an effective spin-dependent gauge potential. Through numerical simulation, we demonstrate that such a gauge field leads to observable spin Hall currents under realistic conditions. We also discuss the quantum spin Hall state in an optical lattice.
Date: March 16, 2010
Creator: Zhu, Shi-Liang; /Michigan U., MCTP /South China Normal U.; Fu, Hao; /Michigan U., MCTP; Wu, C.-J.; /Santa Barbara, KITP et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

NREL Gearbox Reliability Collaborative Experimental Data Overview and Analysis: Preprint

Description: Most turbines in the market today follow a modular configuration comprised of a main shaft, gearbox, high speed shaft, and generator. The gearbox has the important task of increasing the slow rotor speeds to meet the electromechanical requirements of the electromechanical. These gearboxes are commonly composed of a planetary stage and several parallel shaft stages. The planetary, or epicyclical, design of the gearbox is a feature of the design that has many advantages compared to the traditiona… more
Date: May 1, 2010
Creator: Oyague, F.; Gorman, D. & Sheng, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Pairing Strengths for a Two Orbital Model of the Fe-pnictides

Description: Using an RPA approximation, we have calculated the strengths of the singlet and triplet pairing interactions which arise from the exchange of spin and orbital fluctuations for a 2-orbital model of the Fe-pnictide superconductors. When the system is doped with F, the electron pockets become dominant and we find that the strongest pairing occurs in the singlet d-wave pairing and the triplet p-wave pairing channels, which compete closely. The pairing structure in the singlet d-wave channel corresp… more
Date: March 25, 2010
Creator: Qi, Xiao-Liang; Raghu, S.; /Stanford U., Phys. Dept.; Liu, Chao-Xing; /Tsinghua U. /Stanford U., Phys. Dept.; Scalapino, D.J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

SAPHIRE 8 Software Configuration Management Plan

Description: The INL software developers use version control for both the formally released SAPHIRE versions, as well as for source code. For each formal release of the software, the developers perform an acceptance test: the software must pass a suite of automated tests prior to official release. Each official release of SAPHIRE is assigned a unique version identifier. The release is bundled into a standard installation package for easy and consistent set-up by individual users. Included in the release is … more
Date: January 1, 2010
Creator: Smith, Curtis
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Sitewide monitoring at Agra, Kansas, June 2009.

Description: In 1985, carbon tetrachloride was discovered in the groundwater at Agra, Kansas, during routine sampling of public water supply wells. Two of Agra's four public water supply wells contained low but detectable levels of carbon tetrachloride; the concentrations in wells PWS-3 and PWS-4 exceeded the maximum contaminant level. These wells were removed from service in 1986, although they remain available for uses other than drinking water. Other public wells, outside the area of contamination, suppl… more
Date: January 14, 2010
Creator: LaFreniere, L. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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