UNT Libraries Government Documents Department - 257 Matching Results

Search Results

Results: 1 - 24 next
open access

4-wave mixing for phase-matching free nonlinear optics in quantum cascade structures : LDRD 08-0346 final report.

Description: Optical nonlinearities and quantum coherences have the potential to enable efficient, high-temperature generation of coherent THz radiation. This LDRD proposal involves the exploration of the underlying physics using intersubband transitions in a quantum cascade structure. Success in the device physics aspect will give Sandia the state-of-the-art technology for high-temperature THz quantum cascade lasers. These lasers are useful for imaging and spectroscopy in medicine and national defense. Suc… more
Date: October 1, 2010
Creator: Chow, Weng Wah; Wanke, Michael Clement; Allen, Dan G.; Yang, Zhenshan & Waldmueller, Ines
Item Type: Refine your search to only Report
open access

Active infrared materials for beam steering.

Description: The mid-infrared (mid-IR, 3 {micro}m -12 {micro}m) is a highly desirable spectral range for imaging and environmental sensing. We propose to develop a new class of mid-IR devices, based on plasmonic and metamaterial concepts, that are dynamically controlled by tunable semiconductor plasma resonances. It is well known that any material resonance (phonons, excitons, electron plasma) impacts dielectric properties; our primary challenge is to implement the tuning of a semiconductor plasma resonance… more
Date: October 1, 2010
Creator: Brener, Igal; Reno, John Louis; Passmore, Brandon Scott; Gin, Aaron V.; Shaner, Eric Arthur; Miao, Xiaoyu et al.
Item Type: Refine your search to only Report
open access

Advanced analysis methods in particle physics

Description: Each generation of high energy physics experiments is grander in scale than the previous - more powerful, more complex and more demanding in terms of data handling and analysis. The spectacular performance of the Tevatron and the beginning of operations of the Large Hadron Collider, have placed us at the threshold of a new era in particle physics. The discovery of the Higgs boson or another agent of electroweak symmetry breaking and evidence of new physics may be just around the corner. The gre… more
Date: October 1, 2010
Creator: Bhat, Pushpalatha C.
Item Type: Refine your search to only Article
open access

Advanced Fuels Campaign Execution Plan

Description: The purpose of the Advanced Fuels Campaign (AFC) Execution Plan is to communicate the structure and management of research, development, and demonstration (RD&D) activities within the Fuel Cycle Research and Development (FCRD) program. Included in this document is an overview of the FCRD program, a description of the difference between revolutionary and evolutionary approaches to nuclear fuel development, the meaning of science-based development of nuclear fuels, and the “Grand Challenge” for t… more
Date: October 1, 2010
Creator: Pasamehmetoglu, Kemal
Item Type: Refine your search to only Report
open access

Advanced Unit Commitment Strategies for the U.S. Eastern Interconnection: Preprint

Description: This paper outlines a study undertaken for the U.S. Eastern Interconnection in which different advanced unit commitment strategies were simulated for three different years to evaluate the benefits that may occur from using these strategies as an operational tool.
Date: October 1, 2010
Creator: Ela, E.; Milligan, M.; Meibom, P.; Barth, R. & Tuohy, A.
Item Type: Refine your search to only Article
open access

ADVANCING REACTIVE TRACER METHODS FOR MONITORING THERMAL DRAWDOWN IN GEOTHERMAL ENHANCED GEOTHERMAL RESERVOIRS

Description: Reactive tracers have long been considered a possible means of measuring thermal drawdown in a geothermal system, before significant cooling occurs at the extraction well. Here, we examine the sensitivity of the proposed method to evaluate reservoir cooling and demonstrate that while the sensitivity of the method as generally proposed is low, it may be practical under certain conditions.
Date: October 1, 2010
Creator: Plummer, Mitchell A.; Palmer, Carl D.; Mattson, Earl D.; Redden, George D. & Hull, Laurence C.
Item Type: Refine your search to only Article
open access

Aerosol cluster impact and break-up : model and implementation.

Description: In this report a model for simulating aerosol cluster impact with rigid walls is presented. The model is based on JKR adhesion theory and is implemented as an enhancement to the granular (DEM) package within the LAMMPS code. The theory behind the model is outlined and preliminary results are shown. Modeling the interactions of small particles is relevant to a number of applications (e.g., soils, powders, colloidal suspensions, etc.). Modeling the behavior of aerosol particles during agglomerati… more
Date: October 1, 2010
Creator: Lechman, Jeremy B.
Item Type: Refine your search to only Report
open access

Air Shipment of Spent Nuclear Fuel from Romania to Russia

Description: Romania successfully completed the world’s first air shipment of spent nuclear fuel transported in Type B(U) casks under existing international laws and without shipment license special exceptions when the last Romanian highly enriched uranium (HEU) spent nuclear fuel was transported to the Russian Federation in June 2009. This air shipment required the design, fabrication, and licensing of special 20 foot freight containers and cask tiedown supports to transport the eighteen TUK 19 shipping ca… more
Date: October 1, 2010
Creator: Bolshinsky, Igor; Allen, Ken; Biro, Lucian & Buchelnikov, Alexander
Item Type: Refine your search to only Article
open access

Algorithms Performance Investigation of a Generalized Spreader-Bar Detection System

Description: A “generic” gantry-crane-mounted spreader bar detector has been simulated in the Monte-Carlo radiation transport code MCNP [1]. This model is intended to represent the largest realistically feasible number of detector crystals in a single gantry-crane model intended to sit atop an InterModal Cargo Container (IMCC). Detectors were chosen from among large commonly-available sodium iodide (NaI) crystal scintillators and spaced as evenly as is thought possible with a detector apparatus attached to … more
Date: October 1, 2010
Creator: Robinson, Sean M.; Ashbaker, Eric D.; Hensley, Walter K.; Schweppe, John E.; Sandness, Gerald A.; Erikson, Luke E. et al.
Item Type: Refine your search to only Report
open access

Analysis of Federal Subsidies: Implied Price of Carbon

Description: For informed climate change policy, it is important for decision makers to be able to assess how the costs and benefits of federal energy subsidies are distributed and to be able to have some measure to compare them. One way to do this is to evaluate the implied price of carbon (IPC) for a federal subsidy, or set of subsidies; where the IPC is the cost of the subsidy to the U.S. Treasury divided by the emissions reductions it generated. Subsidies with lower IPC are more cost effective at reduci… more
Date: October 1, 2010
Creator: Cooper, D. Craig & Foulke, Thomas
Item Type: Refine your search to only Report
open access

Annual Site Environmental Report: 2009(ASER)

Description: This report provides information about environmental programs during the calendar year of 2009 at the SLAC National Accelerator Laboratory (SLAC), Menlo Park, California. Activities that span the calendar year, i.e., stormwater monitoring covering the winter season of 2009/2010 (October 2009 through May 2010), are also included. Production of an annual site environmental report (ASER) is a requirement established by the United States Department of Energy (DOE) for all management and operating (… more
Date: October 1, 2010
Item Type: Refine your search to only Report
open access

Application of a localized chaos by rf-phase modulations in phase-space dilution

Description: Physics of chaos in a localized phase-space region is exploited to produce a longitudinally uniformly distributed beam. Theoretical study and simulations are used to study its origin and applicability in phase-space dilution of beam bunch. Through phase modulation to a double-rf system, a central region of localized chaos bounded by invariant tori are generated by overlapping parametric resonances. Condition and stability of the chaos will be analyzed. Applications include high-power beam, beam… more
Date: October 1, 2010
Creator: Lee, S. Y. & Ng, K. Y.
Item Type: Refine your search to only Article
open access

Architecture of a Silicon Strip Beam Position Monitor

Description: A collaboration between Fermilab and the Institute for High Energy Physics (IHEP), Beijing, has developed a beam position monitor for the IHEP test beam facility. This telescope is based on 5 stations of silicon strip detectors having a pitch of 60 microns. The total active area of each layer of the detector is about 12 x 10 cm{sup 2}. Readout of the strips is provided through the use of VA1 ASICs mounted on custom hybrid printed circuit boards and interfaced to Adapter Cards via copper-over-ka… more
Date: October 1, 2010
Creator: Angstadt, R.; Cooper, W.; Demarteau, M.; Green, J.; Jakubowski, S.; Prosser, A. et al.
Item Type: Refine your search to only Article
open access

Assessing the Impact of Heat Rejection Technology on CSP Plant Revenue: Preprint

Description: This paper explores the impact of cooling technology on revenue for hybrid-cooled plants with varying wet cooling penetration for four representative locations in the American Southwest. The impact of ACC design-point initial temperature difference (ITD - the difference between the condensing steam temperature and ambient dry-bulb) is also included in the analysis.
Date: October 1, 2010
Creator: Wagner, M. J. & Kutscher, C. F.
Item Type: Refine your search to only Article
open access

Automating Risk Assessments of Hazardous Material Shipments for Transportation Routes and Mode Selection

Description: The METEOR project at Idaho National Laboratory (INL) successfully addresses the difficult problem in risk assessment analyses of combining the results from bounding deterministic simulation results with probabilistic (Monte Carlo) risk assessment techniques. This paper describes a software suite designed to perform sensitivity and cost/benefit analyses on selected transportation routes and vehicles to minimize risk associated with the shipment of hazardous materials. METEOR uses Monte Carlo te… more
Date: October 1, 2010
Creator: Dolphin, Barbara H.; RIchins, William D. & Novascone, Stephen R.
Item Type: Refine your search to only Article
open access

Baseline for Climate Change: Modeling Watershed Aquatic Biodiversity Relative to Environmental and Anthropogenic Factors

Description: Objectives of the two-year study were to (1) establish baselines for fish and macroinvertebrate community structures in two mid-Atlantic lower Piedmont watersheds (Quantico Creek, a pristine forest watershed; and Cameron Run, an urban watershed, Virginia) that can be used to monitor changes relative to the impacts related to climate change in the future; (2) create mathematical expressions to model fish species richness and diversity, and macroinvertebrate taxa and macroinvertebrate functional … more
Date: October 1, 2010
Creator: Maurakis, Eugene G
Item Type: Refine your search to only Report
open access

Basin-Scale Opportunity Assessment Initiative Background Literature Review

Description: As called for in the March 24, 2010, Memorandum of Understanding (MOU) for Hydropower, the U.S. Department of Energy (DOE), the U.S. Department of the Interior (DOI), the U.S. Army Corps of Engineers (USACE), environmental stakeholders, and the hydropower industry are collaborating to identify opportunities to simultaneously increase electricity generation and improve environmental services in river basins of the United States. New analytical tools provide an improved ability to understand, mod… more
Date: October 1, 2010
Creator: Saulsbury, Bo; Geerlofs, Simon H.; Cada, Glenn F & Bevelhimer, Mark S
Item Type: Refine your search to only Report
open access

Benefit of Regional Energy Balancing Service on Wind Integration in the Western Interconnection of the United States: Preprint

Description: This analysis indicates the extent to which pooled regional dispatch for matching generation to load mitigates the costs and improves associated reliability, particularly in scenarios with high penetration of variable output resources, such as wind
Date: October 1, 2010
Creator: Milligan, M.; Kirby, B.; King, J. & Beuning, S.
Item Type: Refine your search to only Article
open access

Beyond the Inventory: An Interagency Collaboration to Reduce Greenhouse Gas Emissions in the Greater Yellowstone Area

Description: As one of the largest, intact ecosystems in the continental United States, land managers within the Greater Yellowstone Area (GYA) have recognized the importance of compiling and understanding agency greenhouse gas (GHG) emissions. The 10 Federal units within the GYA have taken an active role in compiling GHG inventories on a unit- and ecosystem-wide level, setting goals for GHG mitigation, and identifying mitigation strategies for achieving those goals. This paper details the processes, method… more
Date: October 1, 2010
Creator: Kandt, A.; Hotchkiss, E. & Fiebig, M.
Item Type: Refine your search to only Report
open access

Bi-Annual Report 2010-2011: Shaping pulse flows to meet environmental and energy objectives

Description: This report describes a bioenergetic model developed to allocate seasonal pulse flows to benefit salmon growth. The model links flow with floodplain inundation and production of invertebrate prey eaten by juvenile Chinook salmon. A unique quantile modeling approach is used to describe temporal variation among juvenile salmon spawned at different times. Preliminary model outputs are presented and future plans to optimize flows both to maximize salmon growth and hydropower production are outlined. more
Date: October 1, 2010
Creator: Jager, Yetta
Item Type: Refine your search to only Report
open access

Building America House Simulation Protocols (Revised)

Description: The House Simulation Protocol document was developed to track and manage progress toward Building America's multi-year, average whole-building energy reduction research goals for new construction and existing homes, using a consistent analytical reference point. This report summarizes the guidelines for developing and reporting these analytical results in a consistent and meaningful manner for all home energy uses using standard operating conditions.
Date: October 1, 2010
Creator: Hendron, R. & Engebrecht, C.
Item Type: Refine your search to only Report
open access

Bypass Flow Computations using a One-Twelfth Symmetric Sector For Normal Operation in a 350 MWth VHTR

Description: Significant uncertainty exists about the effects of bypass flow in a prismatic gas-cooled very high temperature reactor (VHTR). Bypass flow is the flow in the gaps between prismatic graphite blocks in the core. The gaps are present because of variations in their construction, imperfect installation and expansion and shrinkage from thermal heating and neutron fluence. Calculations are performed using computational fluid dynamics (CFD) for flow of the helium coolant in the gap and coolant channel… more
Date: October 1, 2010
Creator: Johnson, Richard W. & Sato, Hiroyuki
Item Type: Refine your search to only Article
Back to Top of Screen