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Application of telerobotic control to remote processing of nuclear material

Description: In processing radioactive material there are certain steps which have customarily required operators working at glove box enclosures. This can subject the operators to low level radiation dosages and the risk of accidental contamination, as well as generate significant radioactive waste to accommodate the human interaction. An automated system is being developed to replace the operator at the glove box and thus remove the human from these risks, and minimize waste. Although most of the processi… more
Date: July 8, 1991
Creator: Merrill, R. D.; Grasz, E. L.; Herget, C. J.; Gavel, D. T.; Addis, R. B. & DeMinico, G. A.
Partner: UNT Libraries Government Documents Department
open access

Decoding of movement direction using optical imaging of motor cortex

Description: Article accompanying a poster presentation for the 2013 Computational Neuroscience Annual Meeting. This article discusses the decoding of movement direction using optical imaging of motor cortex.
Date: July 8, 2013
Creator: Tam, Nicoladie D. & Zouridakis, George
Partner: UNT College of Arts and Sciences
open access

Random polycrystals of grains containing cracks: Model ofquasistatic elastic behavior for fractured systems

Description: A model study on fractured systems was performed using aconcept that treats isotropic cracked systems as ensembles of crackedgrains by analogy to isotropic polycrystalline elastic media. Theapproach has two advantages: (a) Averaging performed is ensembleaveraging, thus avoiding the criticism legitimately leveled at mosteffective medium theories of quasistatic elastic behavior for crackedmedia based on volume concentrations of inclusions. Since crack effectsare largely independent of the volume … more
Date: July 8, 2006
Creator: Berryman, James G. & Grechka, Vladimir
Partner: UNT Libraries Government Documents Department
open access

Going with the flow: Life cycle costing for industrial pumping systems

Description: Industries worldwide depend upon pumping systems for theirdaily operation. These systems account for nearly 20 percent of theworld's industrial electrical energy demand and range from 25-50 percentof the energy usage in certain industrial plant operations. Purchasedecisions for a pump and its related system components are typicallybased upon a low bid, rather than the cost to operate the system over itslifetime. Additionally, plant facilities personnel are typically focussedon maintaining exist… more
Date: July 8, 2002
Creator: Tutterow, Vestal; Hovstadius, Gunnar & McKane, Aimee
Partner: UNT Libraries Government Documents Department
open access

Tests of Four PT-415 Coolers Installed in the Drop-in Mode

Description: The superconducting magnets and absorbers for MICE will be cooled using PT415 pulse tube coolers. The cooler 2nd stage will be connected to magnets and the absorbers through a helium or hydrogen re-condensing system. It was proposed that the coolers be connected to the magnets in such a way that the cooler can be easily installed and removed, which permits the magnets to be shipped without the coolers. The drop-in mode requires that the cooler 1st stage be well connected to the magnet shields a… more
Date: July 8, 2008
Creator: Green, Michael A. & Wang, S. T.
Partner: UNT Libraries Government Documents Department
open access

AC Loss Analysis on the Superconducting Coupling Magnet in MICE

Description: A pair of coupling solenoids is used in MICE experiment to generate magnetic field which keeps the muons within the iris of thin RF cavity windows. The coupling solenoids have a 1.5-meter inner diameter and will produce 7.4 T peak magnetic field. Three types of AC losses in coupling solenoid are discussed. The affect of AC losses on the temperature distribution within the cold mass during charging and rapid discharging process is analyzed also. The analysis result will be further confirmed by t… more
Date: July 8, 2008
Creator: Wu, Hong; Wang, Li; Green, Michael; Li, LanKai; Xu, FengYu; Liu, XiaoKun et al.
Partner: UNT Libraries Government Documents Department
open access

Novel neutralized-beam intense neutron source for fusion technology development

Description: We describe a neutralized-beam intense neutron source (NBINS) as a relevant application of fusion technology for the type of high-current ion sources and neutral beamlines now being developed for heating and fueling of magnetic-fusion-energy confinement systems. This near-term application would support parallel development of highly reliable steady-state higher-voltage neutral D/sup 0/ and T/sup 0/ beams and provide a relatively inexpensive source of fusion neutrons for materials testing at up … more
Date: July 8, 1983
Creator: Osher, J.E. & Perkins, L.J.
Partner: UNT Libraries Government Documents Department
open access

Incorporation of chemical kinetic models into process control

Description: An important consideration in chemical process control is to determine the precise rationing of reactant streams, particularly when a large time delay exists between the mixing of the reactants and the measurement of the product. In this paper, a method is described for incorporating chemical kinetic models into the control strategy in order to achieve optimum operating conditions. The system is first characterized by determining a reaction rate surface as a function of all input reactant conce… more
Date: July 8, 1981
Creator: Herget, C.J. & Frazer, J.W.
Partner: UNT Libraries Government Documents Department
open access

A Comparison of Inexact Newton and Coordinate Descent Meshoptimization Technqiues

Description: We compare inexact Newton and coordinate descent methods for optimizing the quality of a mesh by repositioning the vertices, where quality is measured by the harmonic mean of the mean-ratio metric. The effects of problem size, element size heterogeneity, and various vertex displacement schemes on the performance of these algorithms are assessed for a series of tetrahedral meshes.
Date: July 8, 2004
Creator: Diachin, L F; Knupp, P; Munson, T & Shontz, S
Partner: UNT Libraries Government Documents Department
open access

SEISMIC DATA FOR NUCLEAR EXPLOSION MONITORING IN THE ARABIAN PENINSULA

Description: We report results from the third and final year of our project (ROA0101-35) to collect seismic event and waveform data recorded in and around the Arabian Peninsula. This effort involves several elements. We are working with King Abdulaziz City for Science and Technology to collect data from the Saudi National Seismic Network, that consists of 38 digital three-component stations (27 broadband and 11 short-period). We have an ongoing collaboration with the Kuwait Institute for Scientific Research… more
Date: July 8, 2004
Creator: Rodgers, A. & Al-Amri, A.
Partner: UNT Libraries Government Documents Department
open access

String Theory and Water Waves

Description: No Description Available.
Date: July 8, 2013
Creator: Iyer, Ramakrishnan; Johnson, Clifford V. & Pennington, Jeffrey S.
Partner: UNT Libraries Government Documents Department
open access

Performance of Integrated Systems of Automated Roller Shade Systems and Daylight Responsive Dimming Systems

Description: Daylight responsive dimming systems have been used in few buildings to date because they require improvements to improve reliability. The key underlying factor contributing to poor performance is the variability of the ratio of the photosensor signal to daylight workplane illuminance in accordance with sun position, sky condition, and fenestration condition. Therefore, this paper describes the integrated systems between automated roller shade systems and daylight responsive dimming systems with… more
Date: July 8, 2010
Creator: Park, Byoung-Chul; Choi, An-Seop; Jeong, Jae-Weon & Lee, Eleanor S.
Partner: UNT Libraries Government Documents Department
open access

Versatile assembly of p-carboxylatocalix[4]arene-O-alkyl ethers

Description: Crystallisation of lower-rim tetra-O-alkylated p-carboxylatocalix[4]arenes from pyridine results in the formation of both bi-layer and pillar type supramolecular motifs. Full alkylation at the calixarene lower rim has significant influence over the supramolecular self-assembly motif, including preclusion of pyridine guest molecules from the calixarene cavity in the solid state.
Date: July 8, 2009
Creator: Kennedy, Stuart; Teat, Simon J. & Dalgarno, Scott J.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of metal-foil strain gages for cryogenic application in magnetic fields

Description: The requirement for the design and construction of large superconducting magnet systems for fusion research has raised a number of new questions regarding the properties of composite superconducting conductors. One of these, the effect of mechanical stress on the current-carrying capacity of Nb/sub 3/Sn, is of major importance in determining the feasibility of constructing large magnets with this material. A typical experiment for determining such data involves the measurement of critical curre… more
Date: July 8, 1977
Creator: Freynik, H. S. Jr.; Roach, D. R.; Deis, D. W. & Hirzel, D. G.
Partner: UNT Libraries Government Documents Department
open access

Drift Time Measurement in the ATLAS Liquid Argon Electromagnetic Calorimeter using Cosmic Muons

Description: No Description Available.
Date: July 8, 2013
Creator: Aad, G & /Freiburg U. /Oklahoma U. /Barcelona, IFAE /Geneva U. /Oxford U. /Baku, Inst. Phys. /Oklahoma State U. /Michigan State U. /Tel Aviv U. /Orsay, LAL /ICTP, Trieste /INFN, Udine /Brookhaven /Hampton U. /Yale U. /INFM, Cosenza /INFN, Cosenza /Queen Mary, U. of London /Rutherford /Brandeis U. /Granada U.
Partner: UNT Libraries Government Documents Department
open access

ELECTRONICS UPGRADE TO THE SAVANNAH RIVER NATIONAL LABORATORY COULOMETER FOR PLUTONIUM AND NEPTUNIUM ASSAY

Description: The Savannah River Site (SRS) has the analytical measurement capability to perform high-precision plutonium concentration measurements by controlled-potential coulometry. State-of-the-art controlled-potential coulometers were designed and fabricated by the Savannah River National Laboratory and installed in the Analytical Laboratories process control laboratory. The Analytical Laboratories uses coulometry for routine accountability measurements of and for verification of standard preparations u… more
Date: July 8, 2011
Creator: Cordaro, J.; Holland, M.; Reeves, G.; Nichols, S. & Kruzner, A.
Partner: UNT Libraries Government Documents Department
open access

1/5-scale experiment of a Mark I boiling-water reactor pressure-suppression system under hypothetical LOCA conditions

Description: Experimental results show the sensitivity of hydrodynamically generated vertical loads to changes in the drywell pressurization rate, downcomer submergence, and vent-line loss coefficient. Insignificant effects on peak vertical loads were observed when the vent-line loss was varied. Peak vertical loads can be reduced by adding initial drywell overpressure so that the downcomers are partly cleared of water. Spatial variation of pressure at about the time of vent clearing is seen in comparisons o… more
Date: July 8, 1977
Creator: Pitts, J. H. & McCauley, E. W.
Partner: UNT Libraries Government Documents Department
open access

Single Molecule Junctions: A Laboratory for Chemistry, Mechanics and Bond Rupture

Description: Simultaneous measurement [1] of junction conductance and sustained force in single molecule junctions bridging metal electrodes provides a powerful tool in the quantitative study of the character of molecule-metal bonds. In this talk I will discuss three topics. First, I will describe chemical trends in link bond strength based on experiments and Density Functional Theory based calculations. Second, I will focus on the specific case of pyridine-linked junctions. Bond rupture from the high condu… more
Date: July 8, 2013
Creator: S., Hybertsen M.
Partner: UNT Libraries Government Documents Department
open access

TAGGING, TRACKING AND LOCATING WITHOUT GPS

Description: The Savannah River National Laboratory (SRNL) was requested to lead a Law Enforcement Working Group that was formed to collaborate on common operational needs. All agencies represented on the working group ranked their need to tag, track, and locate a witting or unwitting target as their highest priority. Specifically, they were looking for technologies more robust than Global Positioning Satellite (GPS), could communicate back to the owner, and worked where normal cell phone communications did… more
Date: July 8, 2012
Creator: Cordaro, J.; Coleman, T. & Shull, D.
Partner: UNT Libraries Government Documents Department
open access

Thermal characteristics of air flow cooling in the lithium ion batteries experimental chamber

Description: A battery pack prototype has been designed and built to evaluate various air cooling concepts for the thermal management of Li-ion batteries. The heat generation from the Li-Ion batteries was simulated with electrical heat generation devices with the same dimensions as the Li-Ion battery (200 mm x 150 mm x 12 mm). Each battery simulator generates up to 15W of heat. There are 20 temperature probes placed uniformly on the surface of the battery simulator, which can measure temperatures in the ran… more
Date: July 8, 2012
Creator: A., Lukhanin; U., Rohatgi; Belyaev, A.; Fedorchenko, D.; Khazhmuradov, M.; Lukhanin, O et al.
Partner: UNT Libraries Government Documents Department
open access

Channel Modeling and Time Delay Estimation for Clock Synchronization Among Seaweb Nodes

Description: From simulations, tracking of the impulse response is feasible. Potential to benefit other functions such as ranging between two nodes. Potential to combine the features of different protocols to create a new and more realistic clock-synchronization protocol.
Date: July 8, 2012
Creator: Gagnon, Pascal; Rice, Joseph A. & Clark, Grace A.
Partner: UNT Libraries Government Documents Department
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