National Library of Energy BETA

Sample records for implement passive tracer

  1. Dispersion of Passive Tracers in the Surfzone

    E-Print Network [OSTI]

    Fedderson, Falk; Guza, Robert T.

    2007-01-01

    Dispersion of passive tracers in the surfzone Feddersen andThe dispersion of passive tracers, such as pollutants, in

  2. Passive Tracer Dispersion with Random or Periodic Source \\Lambda

    E-Print Network [OSTI]

    Passive Tracer Dispersion with Random or Periodic Source \\Lambda Jinqiao Duan Clemson University sources on the pattern formation and long­time behavior of concentration pro­ files of passive tracers Introduction The dispersion of passive tracers (or passive scalars) occur in various geo­ physical

  3. Passive Tracer Dispersion with Random or Periodic Source

    E-Print Network [OSTI]

    Passive Tracer Dispersion with Random or Periodic Source Jinqiao Duan Clemson University sources on the pattern formation and long-time behavior of concentration pro- #12;les of passive tracers #12;1 Introduction The dispersion of passive tracers (or passive scalars) occur in various geo

  4. Almost Periodic Passive Tracer Dispersion \\Lambda Hongjun Gao 1 , Jinqiao Duan 2 and Xinchu Fu 3

    E-Print Network [OSTI]

    Almost Periodic Passive Tracer Dispersion \\Lambda Hongjun Gao 1 , Jinqiao Duan 2 and Xinchu Fu 3 1 the impact of external sources on the pat­ tern formation of concentration profiles of passive tracers Science Foundation Grant DMS­ 9704345 and the UK EPSRC Grant GR/M36335. 1 #12; Key words: Passive tracer

  5. Passive tracer patchiness and particle trajectory stability in incompressible two-dimensional flows

    E-Print Network [OSTI]

    Olascoaga, Maria Josefina

    Passive tracer patchiness and particle trajectory stability in incompressible two-dimensional flows in Geophysics (2003) 1:18 Nonlinear Processes in Geophysics c European Geophysical Society 2003 Passive tracer." This leads to patchiness in the evolution of passive tracer distribu- tions. Also, it is argued

  6. Passive tracer reconstruction as a least-squares problem with a semi-Lagrangian constraint

    E-Print Network [OSTI]

    deYoung, Brad

    Passive tracer reconstruction as a least-squares problem with a semi-Lagrangian constraint-dimensional, nonstationary, passive tracer field in the ocean with open boundaries and a known velocity field. The observations, spatial smoothing terms and passive tracer conservation equation were included as weak

  7. Dispersion of passive tracers in closed basins: Beyond the diffusion coefficient

    E-Print Network [OSTI]

    Cencini, Massimo

    Dispersion of passive tracers in closed basins: Beyond the diffusion coefficient V. Artale ENEA, 00185 Roma, Italy Received 25 April 1997; accepted 10 July 1997 We investigate the spreading of passive of diffusion and transport of passive tracers in a given velocity field has both theoretical and prac- tical

  8. Passive tracers in a general circulation model of the Southern Ocean I. G. Stevens, D. P. Stevens

    E-Print Network [OSTI]

    Stevens, David

    Passive tracers in a general circulation model of the Southern Ocean I. G. Stevens, D. P. Stevens: 22 January 1999 / Accepted: 12 February 1999 Abstract. Passive tracers are used in an o-line version and provide information on the inter-ocean exchange of water masses. The use of passive tracers allows

  9. Seasonal Variation in Monthly Average Air Change Rates Using Passive Tracer Gas Measurements

    E-Print Network [OSTI]

    Hansen, Ren Rydhof

    of indoor air pollution sources. Concurrently, great efforts are made to make buildings energy efficient 1970s, while less attention has been paid to IAQ. Insufficient venting of indoor air pollutantsSeasonal Variation in Monthly Average Air Change Rates Using Passive Tracer Gas Measurements Marie

  10. Isolating the role of mesoscale eddies in mixing of a passive tracer in an eddy resolving model

    E-Print Network [OSTI]

    Miami, University of

    Isolating the role of mesoscale eddies in mixing of a passive tracer in an eddy resolving model February 2008; published 16 May 2008. [1] This study examines the role of mesoscale eddies in distribution was replaced by a down-gradient diffusive parameterization. Our results demonstrate that advection by mesoscale

  11. Passive tracer in a flow corresponding to a two dimensional stochastic Navier Stokes equations

    E-Print Network [OSTI]

    Tomasz Komorowski; Szymon Peszat; Tomasz Szarek

    2012-04-26

    In this paper we prove the law of large numbers and central limit theorem for trajectories of a particle carried by a two dimensional Eulerian velocity field. The field is given by a solution of a stochastic Navier--Stokes system with a non-degenerate noise. The spectral gap property, with respect to Wasserstein metric, for such a system has been shown in [9]. In the present paper we show that a similar property holds for the environment process corresponding to the Lagrangian observations of the velocity. In consequence we conclude the law of large numbers and the central limit theorem for the tracer. The proof of the central limit theorem relies on the martingale approximation of the trajectory process.

  12. Experiments to Evaluate and Implement Passive Tracer Gas Methods to Measure Ventilation Rates in Homes

    E-Print Network [OSTI]

    Lunden, Melissa

    2014-01-01

    of 1-bromo-4-fluorobenzene (BFB) prepared continuously in a174, 176 were scanned for the BFB internal standard. The MSwith pure standard using BFB as an internal standard.

  13. The effect of variable atmospheric forcing on oceanic subduction of a passive tracer in a numerical model: Implications for global warming

    SciTech Connect (OSTI)

    Horsfall, F.; Bleck, R.; Hanson, H.P.

    1997-11-01

    This study addresses the issue of the ocean`s response to the changing climate. The objectives is to determine the effect of variable atmospheric forcing on the ocean on decadal time scales, specifically on the subduction of a passive tracer. In the context of the model used in this study, this tracer is {open_quotes}tagged{close_quotes} water that is subducted into the thermocline and into the deep ocean. The model used in this study is the Miami Isopycnic Coordinate Ocean Model which has a realistic Atlantic domain from 20{degrees}S to 60{degrees}N. There are twelve model layers, the first (top) layer being the thermodynamically active mixed layer and the lower eleven layers all having constant potential density ({sigma}{sub {theta}}). The atmospheric forcing changes vary latitudinally, allowing for a maximum increase in wind at midlatitudes and a maximum increase in temperature at the poles. In these experiments, it was found that wind speed and temperature effects dominate in bringing about changes in mixed-layer depth and in tracer penetration at high latitudes, with wind speed effects having the greater weight. It is apparent from the results that the weakening of the North Atlantic thermohaline circulation is dependent on the atmospheric changes in air temperature and in the wind field. 11 refs., 2 figs.

  14. Measuring catchment-scale chemical retardation using spectral analysis of reactive and passive chemical tracer time series

    E-Print Network [OSTI]

    Kirchner, James W.

    Measuring catchment-scale chemical retardation using spectral analysis of reactive and passive for Ecology and Hydrology, McLean Building, Wallingford, Oxon OX10 8BB, UK Received 28 August 2002; revised 14, carrying soluble substances with it. Some chemical constituents are non- reactive; these act as passive

  15. 906 IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 55, NO. 5, MAY 2007 RF Front-End Passive Circuit Implementation

    E-Print Network [OSTI]

    Seo, Kwang Seok

    -End Passive Circuit Implementation Including Antenna for ZigBee Applications Chan-Sei Yoo, Member, IEEE, Joong-Sung Lee Abstract--This paper presents a front-end passive circuit module for ZigBee applications using low Terms--Antenna, balun, bandpass filter, front-end pas- sive, ZigBee. I. INTRODUCTION UBIQUITOUS

  16. Lvy Fluctuations and Tracer Diffusion in Dilute Suspensions of Algae and Bacteria

    E-Print Network [OSTI]

    Irwin M. Zaid; Jrn Dunkel; Julia M. Yeomans

    2010-09-20

    Swimming microorganisms rely on effective mixing strategies to achieve efficient nutrient influx. Recent experiments, probing the mixing capability of unicellular biflagellates, revealed that passive tracer particles exhibit anomalous non-Gaussian diffusion when immersed in a dilute suspension of self-motile Chlamydomonas reinhardtii algae. Qualitatively, this observation can be explained by the fact that the algae induce a fluid flow that may occasionally accelerate the colloidal tracers to relatively large velocities. A satisfactory quantitative theory of enhanced mixing in dilute active suspensions, however, is lacking at present. In particular, it is unclear how non-Gaussian signatures in the tracers' position distribution are linked to the self-propulsion mechanism of a microorganism. Here, we develop a systematic theoretical description of anomalous tracer diffusion in active suspensions, based on a simplified tracer-swimmer interaction model that captures the typical distance scaling of a microswimmer's flow field. We show that the experimentally observed non-Gaussian tails are generic and arise due to a combination of truncated L\\'evy statistics for the velocity field and algebraically decaying time correlations in the fluid. Our analytical considerations are illustrated through extensive simulations, implemented on graphics processing units to achieve the large sample sizes required for analyzing the tails of the tracer distributions.

  17. ADVANCES IN ATMOSPHERIC SCIENCES, VOL. 24, NO. 2, 2007, 118 Probability Distribution Function of a Forced Passive

    E-Print Network [OSTI]

    Hu, Yongyun

    of a Forced Passive Tracer in the Lower Stratosphere HU Yongyun ( ) Department of Atmospheric Sciences, School The probability distribution function (PDF) of a passive tracer, forced by a "mean gradient", is stud- ied. First the PDFs of such an externally forced passive tracer. Then, we carry out numerical simulations

  18. Passivated Tunneling Contacts to N-Type Wafer Silicon and Their Implementation into High Performance Solar Cells: Preprint

    SciTech Connect (OSTI)

    Stradins, P.; Essig, S.; Nemeth, W.; Lee, B. G.; Young, D.; Norman, A.; Liu, Y.; Luo, J.-W.; Warren, E.; Dameron, A.; LaSalvia, V.; Page, M.; Rohatgi, A.; Upadhyaya, A.; Rounsaville, B.; Ok, Y.-W.; Glunz, S.; Benick, J.; Feldmann, F.; Hermle, M.

    2014-12-01

    We present a case that passivated contacts based on a thin tunneling oxide layer, combined with a transport layer with properly selected work function and band offsets, can lead to high efficiency c-Si solar cells. Passivated contacts contribute to cell efficiency as well as design flexibility, process robustness, and a simplified process flow. Material choices for the transport layer are examined, including transparent n-type oxides and n+-doped poly-Si. SiO2/n+-poly-Si full-area, induced-junction back surface field contacts to n-FZ and n-Cz Si are incorporated into high efficiency cells with deep, passivated boron emitters.

  19. PASSIVE DETECTORS

    E-Print Network [OSTI]

    Thomas, R.H.

    2010-01-01

    Italy, September 1979 PASSIVE DETECTORS Ralph H. Thomasthereof. |ir>Bi f j I PASSIVE DETECTORS Course on AdvancesI shall interpret the term "passive" radiation detector as

  20. Bringing simulation to implementation: Presentation of a global approach in the design of passive solar buildings under humid tropical climates

    E-Print Network [OSTI]

    Garde, Franois; Celaire, Robert

    2012-01-01

    In early 1995, a DSM pilot initiative has been launched in the French islands of Guadeloupe and Reunion through a partnership between several public and private partners (the French Public Utility EDF, the University of Reunion Island, low cost housing companies, architects, energy consultants, etc...) to set up standards to improve thermal design of new residential buildings in tropical climates. This partnership led to defining optimized bio-climatic urban planning and architectural designs featuring the use of passive cooling architectural principles (solar shading, natural ventilation) and components, as well as energy efficient systems and technologies. The design and sizing of each architectural component on internal thermal comfort in building has been assessed with a validated thermal and airflow building simulation software (CODYRUN). These technical specifications have been edited in a reference document which has been used to build over 300 new pilot dwellings through the years 1996-1998 in Reunion...

  1. Following the flow: tracer particles in astrophysical fluid simulations

    E-Print Network [OSTI]

    Genel, Shy; Nelson, Dylan; Sijacki, Debora; Springel, Volker; Hernquist, Lars

    2013-01-01

    We present two independent numerical schemes for passive tracer particles in the hydrodynamical moving-mesh code Arepo, and compare their performance for various problems, from simple tests to cosmological simulations. The purpose of tracer particles is to allow the flow to be followed in a Lagrangian way, reliably tracing the evolution of the fluid. Such tracer particles can subsequently measure any local instantaneous fluid property, thereby recording the thermodynamical history of individual fluid parcels. We begin by discussing "velocity field tracers", which are advected according to the local velocity field of the fluid, and which have been commonly used in the literature. We find that such tracers do not in general follow the mass flow correctly, particularly in complex flows, and explain why this is the case. This weakness of the method can result in orders-of-magnitude biases in simulations of driven turbulence and in cosmological simulations of structure formation, rendering the velocity field trace...

  2. ADVANCES IN ATMOSPHERIC SCIENCES, VOL. 25, NO. 5, 2008, 805814 Diagnosing Ocean Tracer Transport from Sellafield

    E-Print Network [OSTI]

    Drange, Helge

    applications thereof, idealized releases of passive tracers from the nuclear fuel reprocessing plants are considered; the former being representative of the actual historical discharges from the reprocessing plants tracer concentration from idealized pulse releases from the British nuclear fuel reprocessing plants

  3. The passive and active nature of ocean heat uptake in idealized climate change experiments

    E-Print Network [OSTI]

    Vallis, Geoff

    The passive and active nature of ocean heat uptake in idealized climate change experiments Peng Xie redistribu- tion than by the nearly passive uptake of temperature due to changes in the surface boundary to treating temperature as a passive tracer, leads to significant quantitative errors notably at high

  4. Aggressively Passive

    E-Print Network [OSTI]

    Upadhyaya, K.

    2013-01-01

    Lagrangian (multi-phase) Steady Implicit/Explicit Unsteady flows Free surface & Cavitation, Segregated or Coupled solvers Passiver or Active Scalar t transpor Inviscid, laminar & turbulent flows (k-epsilon, Spalart-Allmaras) Combustion Moving reference...

  5. Passive Curvaton

    E-Print Network [OSTI]

    Chia-Min Lin

    2013-06-19

    We propose a class of curvaton models which we call passive curvaton. In this paper, two kinds of passive curvaton is considered. The first one is a pseudoscalar curvaton couples to a gauge field. Different from the inflaton case, the constraint from formation of primordial black holes (PBHs) is much weaker and large non-gaussianity (of the equiliteral type) can be produced. The second model is a dilaton-like scalar curvaton couples to a gauge field. We investigate the scale dependence of non-gaussianity in this model. In both models, the spectrum and non-Gaussianity are enhanced by the slow-roll parameter of the curvaton field. Other possible passive curvaton models are also mentioned.

  6. RADIATIVE AND PASSIVE COOLING

    E-Print Network [OSTI]

    Martin, M.

    2011-01-01

    Ext. 6782 Radiative and Passive Cooling Marlo Martin andof the Second Nation- al Passive Solar Conference (owned rights. ,I I RADIATIVE AND PASSIVE COOLING* LAIVRENCE

  7. Hood River Passive House

    SciTech Connect (OSTI)

    Hales, D.

    2014-01-01

    The Hood River Passive Project was developed by Root Design Build of Hood River Oregon using the Passive House Planning Package (PHPP) to meet all of the requirements for certification under the European Passive House standards. The Passive House design approach has been gaining momentum among residential designers for custom homes and BEopt modeling indicates that these designs may actually exceed the goal of the U.S. Department of Energy's (DOE) Building America program to reduce home energy use by 30%-50% (compared to 2009 energy codes for new homes). This report documents the short term test results of the Shift House and compares the results of PHPP and BEopt modeling of the project. The design includes high R-Value assemblies, extremely tight construction, high performance doors and windows, solar thermal DHW, heat recovery ventilation, moveable external shutters and a high performance ductless mini-split heat pump. Cost analysis indicates that many of the measures implemented in this project did not meet the BA standard for cost neutrality. The ductless mini-split heat pump, lighting and advanced air leakage control were the most cost effective measures. The future challenge will be to value engineer the performance levels indicated here in modeling using production based practices at a significantly lower cost.

  8. Hood River Passive House

    SciTech Connect (OSTI)

    Hales, David

    2014-01-01

    The Hood River Passive Project was developed by Root Design Build of Hood River Oregon using the Passive House Planning Package (PHPP) to meet all of the requirements for certification under the European Passive House standards. The Passive House design approach has been gaining momentum among residential designers for custom homes and BEopt modeling indicates that these designs may actually exceed the goal of the U.S. Department of Energy's (DOE) Building America program to "reduce home energy use by 30%-50% (compared to 2009 energy codes for new homes). This report documents the short term test results of the Shift House and compares the results of PHPP and BEopt modeling of the project. The design includes high R-Value assemblies, extremely tight construction, high performance doors and windows, solar thermal DHW, heat recovery ventilation, moveable external shutters and a high performance ductless mini-split heat pump. Cost analysis indicates that many of the measures implemented in this project did not meet the BA standard for cost neutrality. The ductless mini-split heat pump, lighting and advanced air leakage control were the most cost effective measures. The future challenge will be to value engineer the performance levels indicated here in modeling using production based practices at a significantly lower cost.

  9. Accelerated simulation of passive tracers in ocean circulation models

    E-Print Network [OSTI]

    Khatiwala, Samar

    to be particularly powerful tools when combined with ocean general circulation models (GCMs). (See England and Maier's circulation, such as the poleward transport of heat, water mass transfor- mation and ventilation

  10. L\\'evy Fluctuations and Tracer Diffusion in Dilute Suspensions of Algae and Bacteria

    E-Print Network [OSTI]

    Zaid, Irwin M; Yeomans, Julia M

    2010-01-01

    Swimming microorganisms rely on effective mixing strategies to achieve efficient nutrient influx. Recent experiments, probing the mixing capability of unicellular biflagellates, revealed that passive tracer particles exhibit anomalous non-Gaussian diffusion when immersed in a dilute suspension of self-motile Chlamydomonas reinhardtii algae. Qualitatively, this observation can be explained by the fact that the algae induce a fluid flow that may occasionally accelerate the colloidal tracers to relatively large velocities. A satisfactory quantitative theory of enhanced mixing in dilute active suspensions, however, is lacking at present. In particular, it is unclear how non-Gaussian signatures in the tracers' position distribution are linked to the self-propulsion mechanism of a microorganism. Here, we develop a systematic theoretical description of anomalous tracer diffusion in active suspensions, based on a simplified tracer-swimmer interaction model that captures the typical distance scaling of a microswimmer'...

  11. Tracer airflow measurement system (TRAMS)

    DOE Patents [OSTI]

    Wang, Duo (Albany, CA)

    2007-04-24

    A method and apparatus for measuring fluid flow in a duct is disclosed. The invention uses a novel high velocity tracer injector system, an optional insertable folding mixing fan for homogenizing the tracer within the duct bulk fluid flow, and a perforated hose sampling system. A preferred embodiment uses CO.sub.2 as a tracer gas for measuring air flow in commercial and/or residential ducts. In extant commercial buildings, ducts not readily accessible by hanging ceilings may be drilled with readily plugged small diameter holes to allow for injection, optional mixing where desired using a novel insertable foldable mixing fan, and sampling hose.

  12. The entrainment and homogenization of tracers within the cyclonic gulf stream recirculation gyre

    E-Print Network [OSTI]

    Pickart, Robert S

    1987-01-01

    The various distributions of tracer associated with the Northern Recirculation Gyre of the Gulf Stream (NRG) are studied to try to obtain information about the flow. An advective-diffusive numerical model is implemented ...

  13. Active and passive plasmonic devices

    E-Print Network [OSTI]

    Pourabdollah Nezhad, Maziar

    2007-01-01

    G. Mattiussi, and P. Berini, "Passive integrated opticsCALIFORNIA, SAN DIEGO Active and Passive Plasmonic Devices ADISSERTATION Active and Passive Plasmonic Devices by Maziar

  14. From Reflexive to Passive

    E-Print Network [OSTI]

    Sohn, Joong-Sun

    1998-01-01

    Previous approaches to the passive development from a reflexive marking focus on how the former is similar to the latter semantically and syntactically. I show that the passive evolution is better understood by looking at the internal procedures...

  15. A Tracer Test Using Ethanol as a Two-Phase Tracer and 2-Naphthalene...

    Open Energy Info (EERE)

    A Tracer Test Using Ethanol as a Two-Phase Tracer and 2-Naphthalene Sulfonate as a Liquid-Phase Tracer at the Coso Geothermal Field Jump to: navigation, search OpenEI Reference...

  16. [Fundamental studies of passivity and passivity breakdown

    SciTech Connect (OSTI)

    Macdonald, D.D.

    1993-07-01

    We developed and experimentally tested physical models for growth and breakdown of passive films on metal surfaces. These models are ``point defect models,`` in which the growth and breakdown are described in terms of movement of anion and cation vacancies. The work during the past 5 years resulted in: theory of growth and breakdown of passive films, theory of corrosion-resistant alloys, electronic structure of passive films, and estimation of damage functions for energy systems. Proposals are give for the five ongoing tasks. 10 figs.

  17. Passive solar space heating

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1980-01-01

    An overview of passive solar space heating is presented indicating trends in design, new developments, performance measures, analytical design aids, and monitored building results.

  18. Active and Passive Filter Synthesis using BOGDAN M. WILAMOWSKI and RAMRAJ GOTTIPARTHY

    E-Print Network [OSTI]

    Wilamowski, Bogdan Maciej

    Active and Passive Filter Synthesis using MATLAB* BOGDAN M. WILAMOWSKI and RAMRAJ GOTTIPARTHY of elements. The second method uses passive ladder prototypes and practical VLSI implementation needs a series are designed in two ways: active filter (cascade type) and passive filter (ladder type). Traditional design

  19. Passive magnetic bearing configurations

    DOE Patents [OSTI]

    Post, Richard F. (Walnut Creek, CA)

    2011-01-25

    A journal bearing provides vertical and radial stability to a rotor of a passive magnetic bearing system when the rotor is not rotating and when it is rotating. In the passive magnetic bearing system, the rotor has a vertical axis of rotation. Without the journal bearing, the rotor is vertically and radially unstable when stationary, and is vertically stable and radially unstable when rotating.

  20. Passive solar construction handbook

    SciTech Connect (OSTI)

    Levy, E.; Evans, D.; Gardstein, C.

    1981-08-01

    Many of the basic elements of passive solar design are reviewed. The unique design constraints presented in passive homes are introduced and many of the salient issues influencing design decisions are described briefly. Passive solar construction is described for each passive system type: direct gain, thermal storage wall, attached sunspace, thermal storage roof, and convective loop. For each system type, important design and construction issues are discussed and case studies illustrating designed and built examples of the system type are presented. Construction details are given and construction and thermal performance information is given for the materials used in collector components, storage components, and control components. Included are glazing materials, framing systems, caulking and sealants, concrete masonry, concrete, brick, shading, reflectors, and insulators. The Load Collector Ratio method for estimating passive system performance is appended, and other analysis methods are briefly summarized. (LEW)

  1. 5, 58415874, 2005 Ozone/tracer

    E-Print Network [OSTI]

    Boyer, Edmond

    ACPD 5, 58415874, 2005 Ozone/tracer relations in the polar vortex R. Muller et al. Title Page Discussions Impact of mixing and chemical change on ozone-tracer relations in the polar vortex R. Muller 1 Commons License. 5841 #12;ACPD 5, 58415874, 2005 Ozone/tracer relations in the polar vortex R. Muller et

  2. Hood River Passive House

    SciTech Connect (OSTI)

    Hales, D.

    2013-03-01

    The Hood River Passive Project was developed by Root Design Build of Hood River Oregon using the Passive House Planning Package (PHPP) to meet all of the requirements for certification under the European Passive House standards. The Passive House design approach has been gaining momentum among residential designers for custom homes and BEopt modeling indicates that these designs may actually exceed the goal of the U.S. Department of Energy's (DOE) Building America program to reduce home energy use by 30%-50% (compared to 2009 energy codes for new homes). This report documents the short term test results of the Shift House and compares the results of PHPP and BEopt modeling of the project.

  3. Passive microfluidic interconnects

    E-Print Network [OSTI]

    Jonnalagadda, Aparna S

    2005-01-01

    Equipment and procedures were developed to test two passive microfluidic interconnect rings held together by the friction forces on the contact surfaces. The second design forms fluid seals by means of thin flared rings ...

  4. Petroleum characterization by perfluorocarbon tracers

    SciTech Connect (OSTI)

    Senum, G.I.; Fajer, R.W. (Brookhaven National Lab., Upton, NY (United States)); Harris, B.R. Jr. (USDOE Naval Petroleum Reserves in California, Tupman, CA (United States)); DeRose, W.E. (Bechtel Petroleum Operations, Inc., Tupman, CA (United States)); Ottaviani, W.L. (Chevron U.S.A., Inc., Bakersfield, CA (United States))

    1992-02-01

    Perfluorocarbon tracers (PFTs), a class of six compounds, were used to help characterize the Shallow Oil Zone (SOZ) reservoir at the Naval Petroleum Reserve in California (NPRC) at Elk Hills. The SOZ reservoir is undergoing a pilot gas injection program to assess the technical feasibility and economic viability of injecting gas into the SOZ for improved oil recovery. PFTs were utilized in the pilot gas injection to qualitatively assess the extent of the pilot gas injection so as to determine the degree of gas containment within the SOZ reservoir.

  5. Tracers for Characterizing Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Karen Wright; George Redden; Carl D. Palmer; Harry Rollins; Mark Stone; Mason Harrup; Laurence C. Hull

    2010-02-01

    Information about the times of thermal breakthrough and subsequent rates of thermal drawdown in enhanced geothermal systems (EGS) is necessary for reservoir management, designing fracture stimulation and well drilling programs, and forecasting economic return. Thermal breakthrough in heterogeneous porous media can be estimated using conservative tracers and assumptions about heat transfer rates; however, tracers that undergo temperature-dependent changes can provide more detailed information about the thermal profile along the flow path through the reservoir. To be effectively applied, the thermal reaction rates of such temperature sensitive traces must be well characterized for the range of conditions that exist in geothermal systems. Reactive tracers proposed in the literature include benzoic and carboxylic acids (Adams) and organic esters and amides (Robinson et al.); however, the practical temperature range over which these tracers can be applied (100-275C) is somewhat limited. Further, for organic esters and amides, little is known about their sorption to the reservoir matrix and how such reactions impact data interpretation. Another approach involves tracers where the reference condition is internal to the tracer itself. Two examples are: 1) racemization of polymeric amino acids, and 2) mineral thermoluminescence. In these cases internal ratios of states are measured rather than extents of degradation and mass loss. Racemization of poly-L-lactic acid (for example) is temperature sensitive and therefore can be used as a temperature-recording tracer depending on the rates of racemization and stability of the amino acids. Heat-induced quenching of thermoluminescence of pre-irradiated LiF can also be used. To protect the tracers from alterations (extraneous reactions, dissolution) in geothermal environments we are encapsulating the tracers in core-shell colloidal structures that will subsequently be tested for their ability to be transported and to protect the tracers from incidental reactions. We review the criteria for practical reactive tracers, which serves as the basis for experimental testing and characterization and can be used to identify other potential candidate tracers. We will also discuss the information obtainable from individual tracers, which has implications for using multiple tracers to obtain information about the thermal history of a reservoir. We will provide an update on our progress for conducting proof-of-principle tests for reactive tracers in the Raft River geothermal system.

  6. Passive research and practice

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1983-01-01

    Passive-solar applications in buildings are described and examples are given to illustrate how research in the field has been approached. The major emphasis of the research has been on devising mathematical models to characterize heat flow within buildings, on the validation of these models by comparison with test results, and on the subsequent use of the models to investigate the influence of both various design parameters and the weather on system performance. Results from both test modules and monitored buildings are given. Simulation analysis, the development of simplified methods, and systems analysis are outlined. Passive-solar practice is described and the key elements that have led to successful passive-solar applications are discussed.

  7. Method of passivating semiconductor surfaces

    DOE Patents [OSTI]

    Wanlass, M.W.

    1990-06-19

    A method is described for passivating Group III-V or II-VI semiconductor compound surfaces. The method includes selecting a passivating material having a lattice constant substantially mismatched to the lattice constant of the semiconductor compound. The passivating material is then grown as an ultrathin layer of passivating material on the surface of the Group III-V or II-VI semiconductor compound. The passivating material is grown to a thickness sufficient to maintain a coherent interface between the ultrathin passivating material and the semiconductor compound. In addition, a device formed from such method is also disclosed.

  8. Novel Multidimensional Tracers for Geothermal Inter-Well Diagnostics...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of Tracers to Characterize Fractures in Engineered Geothermal Systems Advancing reactive tracer methods for measuring thermal evolution in CO2-and water-based geothermal reservoirs...

  9. Advancing Reactive Tracer Methods for Measuring Thermal Evolution...

    Open Energy Info (EERE)

    and Tracer Interpretation Project Description The concepts and theory behind the use of heat-sensitive tracers to study the thermal evolution of geothermal reservoirs was...

  10. Tracer Methods for Characterizing Fracture Stimulation in Enhanced...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Tracer Methods for Characterizing Fracture Stimulation in Enhanced Geothermal Systems (EGS); 2010 Geothermal Technology Program Peer Review Report Tracer Methods for Characterizing...

  11. Tracer Methods for Characterizing Fracture Creation in Enhanced...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Tracer Methods for Characterizing Fracture Creation in Enhanced Geothermal Systems; 2010 Geothermal Technology Program Peer Review Report Tracer Methods for Characterizing Fracture...

  12. Unraveling DPF Degradation using Chemical Tracers and Opportunities...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Unraveling DPF Degradation using Chemical Tracers and Opportunities for Extending Filter Life Unraveling DPF Degradation using Chemical Tracers and Opportunities for Extending...

  13. MODELING PASSIVE SOLAR BUILDINGS WITH HAND CALCULATIONS

    E-Print Network [OSTI]

    Goldstein, David B.

    2011-01-01

    Stromberg, and S.O. Woodall. "Passive Solar Buildings: ASome Analytic Models of Passive Solar Building Perat the Third National Passive Solar Conference, San Jose,

  14. Passive Constructions in Kwak'wala

    E-Print Network [OSTI]

    Rosenblum, Daisy

    2013-01-01

    Publications, Oosterhout, NB. ) Passive Constructions in K !Bernard. 2007. What is a Passive? Studies in Voice andClauses in Bella Coola: Passive vs. Inverse. Voice and

  15. Wireless passive radiation sensor

    DOE Patents [OSTI]

    Pfeifer, Kent B; Rumpf, Arthur N; Yelton, William G; Limmer, Steven J

    2013-12-03

    A novel measurement technique is employed using surface acoustic wave (SAW) devices, passive RF, and radiation-sensitive films to provide a wireless passive radiation sensor that requires no batteries, outside wiring, or regular maintenance. The sensor is small (<1 cm.sup.2), physically robust, and will operate unattended for decades. In addition, the sensor can be insensitive to measurement position and read distance due to a novel self-referencing technique eliminating the need to measure absolute responses that are dependent on RF transmitter location and power.

  16. Passive solar applications

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1985-01-01

    Passive solar applications in buildings are described. The major emphasis of the research has been on devising mathematical models to characterize heat flow within buildings, on the validation of these models by comparison with test results, and on the subsequent use of the models to investigate the influence of both various design parameters and the weather on system performance. Results from both test modules and monitored buildings are discussed. Simulation analysis, the development of simplified methods, and systems analysis are outlined. Passive solar potential in China is discussed.

  17. Passive solar buildings

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1992-10-01

    Developments in passive solar buildings that took place from the early 1970`s through 1989 are described. Much of the work covered was federally sponsored during the period 1975 through 1986. About half the volume is devoted to quantitative methods for modeling, simulation, and design analysis of passive buildings; the other half summarizes the quantitative results of testing and monitoring of models and buildings. The following are covered: building solar gain modeling, simulation analysis, simplified methods, materials and components, analytical results for specific systems, test modules, building integration, performance monitoring and results, and design tools. (MHR)

  18. Passive solar buildings

    SciTech Connect (OSTI)

    Balcomb, J.D. )

    1992-01-01

    Developments in passive solar buildings that took place from the early 1970's through 1989 are described. Much of the work covered was federally sponsored during the period 1975 through 1986. About half the volume is devoted to quantitative methods for modeling, simulation, and design analysis of passive buildings; the other half summarizes the quantitative results of testing and monitoring of models and buildings. The following are covered: building solar gain modeling, simulation analysis, simplified methods, materials and components, analytical results for specific systems, test modules, building integration, performance monitoring and results, and design tools. (MHR)

  19. Passive solar progress: a simplified guide to the 3rd national passive solar conference

    SciTech Connect (OSTI)

    Miller, H.; Howell, Y.; Richards, D.

    1980-10-01

    Some of the concepts and practices that have come to be known as passive solar heating and cooling are introduced, and a current picture of the field is presented. Much of the material presented is derived from papers given at the 3rd National Passive Solar Conference held in San Jose, California in January 1979 and sponsored by the US Department of Energy. Extracts and data from these papers have been integrated in the text with explanatory and descriptive material. In this way, it is attempted to present technical information in an introductory context. Topics include design considerations, passive and hybrid systems and applications, sizing methods and performance prediction, and implementation issues. A glossary is included. (WHK)

  20. Acquisition of the Passive

    E-Print Network [OSTI]

    Hill, Francine

    1998-01-01

    This single-subject pilot study, modeled after de Villiers' 1973, investigates the subject's acquisition of the passive construction (i.e., 'The boy was hit by the girl', as opposed to The girl hit the boy'). The purposes was to determine...

  1. Enhanced tracer transport by the spiral defect chaos state of a convecting fluid

    E-Print Network [OSTI]

    K. -H. Chiam; M. C. Cross; H. S. Greenside; P. F. Fischer

    2004-09-23

    To understand how spatiotemporal chaos may modify material transport, we use direct numerical simulations of the three-dimensional Boussinesq equations and of an advection-diffusion equation to study the transport of a passive tracer by the spiral defect chaos state of a convecting fluid. The simulations show that the transport is diffusive and is enhanced by the spatiotemporal chaos. The enhancement in tracer diffusivity follows two regimes. For large Peclet numbers (that is, small molecular diffusivities of the tracer), we find that the enhancement is proportional to the Peclet number. For small Peclet numbers, the enhancement is proportional to the square root of the Peclet number. We explain the presence of these two regimes in terms of how the local transport depends on the local wave numbers of the convection rolls. For large Peclet numbers, we further find that defects cause the tracer diffusivity to be enhanced locally in the direction orthogonal to the local wave vector but suppressed in the direction of the local wave vector.

  2. Evaluation of passive solar retrofit options

    SciTech Connect (OSTI)

    Ben-David, S.; Kirchemen, C.; Martin, S.; Noll, S.; Roach, F.

    1980-01-01

    An evaluation framework has been developed which allows for the assessment of the role of passive solar retrofit in the nationwide reduction of conventional fuel use. Three types of analysis are proposed within this framework: the physical/technical capability of the present housing stock to incorporate passive solar retrofit; the economic feasibility of the application of retrofit designs; and the actual market potential or acceptance of these alternative retrofit options. Each type of analysis has specific data requirements and a series of evaluation procedures to help establish estimates of the potential for passive solar retrofit in the present housing stock. The data requirements with their respective sources and evaluation procedures for the first two types of analysis-physical/technical setting and economic feasibility, are examined. A distinction is drawn between community specific case studies and more generalized national assessments. Information derived from these three types of analysis, whether case specific or national in scope, can then be used in an evaluation of potential economic impacts. The establishment of regional economic benefits and costs werve as a measure of the merit or attractiveness of the implementation of a passive solar retrofit program.

  3. PRELIMINARY VALEN MODELING OF PASSIVE

    E-Print Network [OSTI]

    PRELIMINARY VALEN MODELING OF PASSIVE AND ACTIVE CONTROL OF RWM IN FIRE J. Bialek Columbia;VALEN Model of FIRE Passive & Active Stabilization 43210 -2 -1 0 1 2 z Z-vv Data from "dcon.FIRE.01" r z structure is computed w/o FIRE conducting wall. #12;VALEN Model of FIRE Passive Stabilization 1 0 0 1 0 - 1

  4. Chinese Passives: Transformational or Lexical?

    E-Print Network [OSTI]

    Zhang, Jiuwu; Wen, Xiaohong

    1989-01-01

    There are two types of passive constructions in Chinese. Type I is a syntactic passive since it is derived through a transformational rule. Type II is a lexical passive. It has certain properties in common with the predicate adjectives in Chinese...

  5. Passive Constructions in Kwak'wala

    E-Print Network [OSTI]

    Rosenblum, Daisy

    2013-01-01

    PRIMARY OBJECT passive: promoted SBJ is house PRED SBJ O2my house. Example (46), with SECONDARY OBJECT passive =&m

  6. Using Biofuel Tracers to Study Alternative Combustion Regimes

    E-Print Network [OSTI]

    Mack, John Hunter; Flowers, Daniel L.; Buchholz, Bruce A.; Dibble, Robert W.

    2006-01-01

    Section B (NIMB) Using Biofuel Tracers to Study Alternativeinjection. We investigate biofuel HCCI combustion, and use

  7. Passivated niobium cavities

    DOE Patents [OSTI]

    Myneni, Ganapati Rao (Yorktown, VA); Hjorvarsson, Bjorgvin (Lagga Arby, SE); Ciovati, Gianluigi (Newport News, VA)

    2006-12-19

    A niobium cavity exhibiting high quality factors at high gradients is provided by treating a niobium cavity through a process comprising: 1) removing surface oxides by plasma etching or a similar process; 2) removing hydrogen or other gases absorbed in the bulk niobium by high temperature treatment of the cavity under ultra high vacuum to achieve hydrogen outgassing; and 3) assuring the long term chemical stability of the niobium cavity by applying a passivating layer of a superconducting material having a superconducting transition temperature higher than niobium thereby reducing losses from electron (cooper pair) scattering in the near surface region of the interior of the niobium cavity. According to a preferred embodiment, the passivating layer comprises niobium nitride (NbN) applied by reactive sputtering.

  8. Passive solar buildings research

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1992-12-31

    This chapter covers research advances in passive solar buildings research during the time span from 1982 through 1991. These advances fall within the following categories: (1) short-term energy monitoring, (2) heat transport by natural convection within buildings, and (3) design guidelines and design tools. In short-term energy monitoring, a simulation model of the building is calibrated, based on data taken in a 3-day test. The method accurately predicts performance over an extended period. Heat transport through doorways is characterized for complex situations that arise in passive solar buildings. Simple concepts and models adequately describe the energy transport in many situations of interest. In a new approach, design guidelines are automatically generated for any specific locality. Worksheets or an accompanying computer program allow the designer to quickly and accurately evaluate performance and investigate design alternatives. 29 refs., 19 figs., 2 tabs.

  9. Results of Chemical Analyses for Alcove 8/Niche 3 Tracer Studies

    SciTech Connect (OSTI)

    Daniels, Jeanette

    2006-02-23

    This is the final report detailing the analyses performed under ORD-FY04-011 "Chemical Analyses for Alcove 8/Niche 3 Tracer Studies." The work was performed under the University and Community College System of Nevada (UCCSN) and the Department of Energy (DOE) Cooperative Agreement Number DE-FC28-04RW12232. This task provided method development and analytical support for the Alcove 8/Niche 3 Tracer Studies in the Exploratory Studies Facility (ESF). Concentrations of tracers, as well as major anions and cations, were reported for samples provided by Lawrence Berkeley National Laboratory (LBNL) and the US Geological Survey (USGS). Samples were analyzed using High Performance Liquid Chromatography (HPLC) and Ion Chromatography (IC). Samples were analyzed and controlled according to Implementing Procedures (IP's) written and approved in accordance with the Office of Civilian Radioactive Waste Management (OCRWM) approved Nevada System of Higher Education (NSHE) Quality Assurance Program.

  10. PASSIVE DETECTION OF VEHICLE LOADING

    SciTech Connect (OSTI)

    Garrett, A.

    2012-01-03

    The Digital Imaging and Remote Sensing Laboratory (DIRS) at the Rochester Institute of Technology, along with the Savannah River National Laboratory is investigating passive methods to quantify vehicle loading. The research described in this paper investigates multiple vehicle indicators including brake temperature, tire temperature, engine temperature, acceleration and deceleration rates, engine acoustics, suspension response, tire deformation and vibrational response. Our investigation into these variables includes building and implementing a sensing system for data collection as well as multiple full-scale vehicle tests. The sensing system includes; infrared video cameras, triaxial accelerometers, microphones, video cameras and thermocouples. The full scale testing includes both a medium size dump truck and a tractor-trailer truck on closed courses with loads spanning the full range of the vehicle's capacity. Statistical analysis of the collected data is used to determine the effectiveness of each of the indicators for characterizing the weight of a vehicle. The final sensing system will monitor multiple load indicators and combine the results to achieve a more accurate measurement than any of the indicators could provide alone.

  11. Passive-solar construction handbook

    SciTech Connect (OSTI)

    Levy, E.; Evans, D.; Gardstein, C.

    1981-02-01

    Many of the basic elements of passive solar design are reviewed. Passive solar construction is covered according to system type, each system type discussion including a general discussion of the important design and construction issues which apply to the particular system and case studies illustrating designed and built examples of the system type. The three basic types of passive solar systems discussed are direct gain, thermal storage wall, and attached sunspace. Thermal performance and construction information is presented for typical materials used in passive solar collector components, storage components, and control components. Appended are an overview of analysis methods and a technique for estimating performance. (LEW)

  12. Enhanced Oil Recovery: Aqueous Flow Tracer Measurement

    SciTech Connect (OSTI)

    Joseph Rovani; John Schabron

    2009-02-01

    A low detection limit analytical method was developed to measure a suite of benzoic acid and fluorinated benzoic acid compounds intended for use as tracers for enhanced oil recovery operations. Although the new high performance liquid chromatography separation successfully measured the tracers in an aqueous matrix at low part per billion levels, the low detection limits could not be achieved in oil field water due to interference problems with the hydrocarbon-saturated water using the system's UV detector. Commercial instrument vendors were contacted in an effort to determine if mass spectrometry could be used as an alternate detection technique. The results of their work demonstrate that low part per billion analysis of the tracer compounds in oil field water could be achieved using ultra performance liquid chromatography mass spectrometry.

  13. Fly ash carbon passivation

    DOE Patents [OSTI]

    La Count, Robert B; Baltrus, John P; Kern, Douglas G

    2013-05-14

    A thermal method to passivate the carbon and/or other components in fly ash significantly decreases adsorption. The passivated carbon remains in the fly ash. Heating the fly ash to about 500 and 800 degrees C. under inert gas conditions sharply decreases the amount of surfactant adsorbed by the fly ash recovered after thermal treatment despite the fact that the carbon content remains in the fly ash. Using oxygen and inert gas mixtures, the present invention shows that a thermal treatment to about 500 degrees C. also sharply decreases the surfactant adsorption of the recovered fly ash even though most of the carbon remains intact. Also, thermal treatment to about 800 degrees C. under these same oxidative conditions shows a sharp decrease in surfactant adsorption of the recovered fly ash due to the fact that the carbon has been removed. This experiment simulates the various "carbon burnout" methods and is not a claim in this method. The present invention provides a thermal method of deactivating high carbon fly ash toward adsorption of AEAs while retaining the fly ash carbon. The fly ash can be used, for example, as a partial Portland cement replacement in air-entrained concrete, in conductive and other concretes, and for other applications.

  14. CHAPTER 9CHAPTER 9CHAPTER 9:CHAPTER 9: Active and PassiveActive and Passive

    E-Print Network [OSTI]

    Gilbes, Fernando

    1 CHAPTER 9CHAPTER 9CHAPTER 9:CHAPTER 9: Active and PassiveActive and Passive Microwave RSMicrowave Hall Passive Remote SensingPassive Remote Sensing Passive remote sensing systems record electromagnetic infrared energy) from the surface of the E hEarth. #12;2 SSM/I Passive Microwave Radiometer Image of

  15. Temperature initiated passive cooling system

    DOE Patents [OSTI]

    Forsberg, C.W.

    1994-11-01

    A passive cooling system for cooling an enclosure only when the enclosure temperature exceeds a maximum standby temperature comprises a passive heat transfer loop containing heat transfer fluid having a particular thermodynamic critical point temperature just above the maximum standby temperature. An upper portion of the heat transfer loop is insulated to prevent two phase operation below the maximum standby temperature. 1 fig.

  16. Temperature initiated passive cooling system

    DOE Patents [OSTI]

    Forsberg, Charles W. (Oak Ridge, TN)

    1994-01-01

    A passive cooling system for cooling an enclosure only when the enclosure temperature exceeds a maximum standby temperature comprises a passive heat transfer loop containing heat transfer fluid having a particular thermodynamic critical point temperature just above the maximum standby temperature. An upper portion of the heat transfer loop is insulated to prevent two phase operation below the maximum standby temperature.

  17. MODELING PASSIVE SOLAR BUILDINGS WITH HAND CALCULATIONS

    E-Print Network [OSTI]

    Goldstein, David B.

    2011-01-01

    time of day for a passive solar house under four differentresponse function for a passive solar house would begin toB(w)/A(w). A good passive solar house w i l l have B/A large

  18. MODELING PASSIVE SOLAR BUILDINGS WITH HAND CALCULATIONS

    E-Print Network [OSTI]

    Goldstein, David B.

    2011-01-01

    of day for simple passive buildings with free-floating (and S.O. Woodall. "Passive Solar Buildings: A Compilation ofAnalytic Models of Passive Solar Building Per formance."

  19. Passive tracer in a slowly decorrelating random flow with a large mean

    E-Print Network [OSTI]

    Tomasz Komorowski; Lenya Ryzhik

    2006-07-25

    We consider the movement of a particle advected by a random flow of the form $\\vv+\\delta \\bF(\\vx)$, with $\\vv\\in\\R^d$ a constant drift, $\\bF(\\vx)$ -- the fluctuation -- given by a zero mean, stationary random field and $\\delta\\ll 1$ so that the drift dominates over the fluctuation. The two-point correlation matrix $\\bR(\\vx)$ of the random field decays as $|\\vx|^{2\\alpha-2}$, as $|\\vx|\\to+\\infty$ with $\\alpha<1$. The Kubo formula for the effective diffusion coefficient obtained in \\cite{kp79} for rapidly decorrelating fields diverges when $1/2\\le\\alpha<1$. We show formally that on the time scale $\\delta^{-1/\\alpha}$ the deviation of the trajectory from its mean $\\by(t)=\\vx(t)-\\vv t$ converges to a fractional Brownian motion $B_\\alpha(t)$ in this range of the exponent $\\alpha$. We also prove rigorously upper and lower bounds which show that $\\E[|\\by(t)|^2]$ converges to zero for times $t\\ll\\delta^{-1/\\alpha}$ and to infinity on time scales $t\\gg \\delta^{-1/\\alpha}$ as $\\delta\\to 0$ when $\\alpha\\in(1/2,1)$. On the other hand, when $\\alpha<1/2$ non-trivial behavior is observed on the time-scale $O(\\delta^{-2})$.

  20. Diagnosis of Ocean Mesoscale Eddy Tracer Fluxes

    E-Print Network [OSTI]

    Fox-Kemper, Baylor

    Diagnosis of Ocean Mesoscale Eddy Tracer Fluxes Baylor Fox-Kemper U. Colorado-Boulder, with Scott - 10,000 km, yrs->centuries) => resolved Mesoscale variability (10 - 100 km, mo -> yrs) => resolved) => parameterized Boundary Layer Models Mesoscale resolving models Climate models Submesoscale variability Coupling

  1. Passive containment cooling system

    DOE Patents [OSTI]

    Billig, P.F.; Cooke, F.E.; Fitch, J.R.

    1994-01-25

    A passive containment cooling system includes a containment vessel surrounding a reactor pressure vessel and defining a drywell therein containing a non-condensable gas. An enclosed wetwell pool is disposed inside the containment vessel, and a gravity driven cooling system (GDCS) pool is disposed above the wetwell pool in the containment vessel and is vented to the drywell. An isolation pool is disposed above the GDCS pool and includes an isolation condenser therein. The condenser has an inlet line disposed in flow communication with the drywell for receiving the non-condensable gas along with any steam released therein following a loss-of-coolant accident (LOCA). The condenser also has an outlet line disposed in flow communication with the drywell for returning to the drywell both liquid condensate produced upon cooling of the steam and the non-condensable gas for reducing pressure within the containment vessel following the LOCA. 1 figure.

  2. Passive containment cooling system

    DOE Patents [OSTI]

    Billig, Paul F. (San Jose, CA); Cooke, Franklin E. (San Jose, CA); Fitch, James R. (San Jose, CA)

    1994-01-01

    A passive containment cooling system includes a containment vessel surrounding a reactor pressure vessel and defining a drywell therein containing a non-condensable gas. An enclosed wetwell pool is disposed inside the containment vessel, and a gravity driven cooling system (GDCS) pool is disposed above the wetwell pool in the containment vessel and is vented to the drywell. An isolation pool is disposed above the GDCS pool and includes an isolation condenser therein. The condenser has an inlet line disposed in flow communication with the drywell for receiving the non-condensable gas along with any steam released therein following a loss-of-coolant accident (LOCA). The condenser also has an outlet line disposed in flow communication with the drywell for returning to the drywell both liquid condensate produced upon cooling of the steam and the non-condensable gas for reducing pressure within the containment vessel following the LOCA.

  3. Passive magnetic bearing system

    DOE Patents [OSTI]

    Post, Richard F.

    2014-09-02

    An axial stabilizer for the rotor of a magnetic bearing provides external control of stiffness through switching in external inductances. External control also allows the stabilizer to become a part of a passive/active magnetic bearing system that requires no external source of power and no position sensor. Stabilizers for displacements transverse to the axis of rotation are provided that require only a single cylindrical Halbach array in its operation, and thus are especially suited for use in high rotation speed applications, such as flywheel energy storage systems. The elimination of the need of an inner cylindrical array solves the difficult mechanical problem of supplying support against centrifugal forces for the magnets of that array. Compensation is provided for the temperature variation of the strength of the magnetic fields of the permanent magnets in the levitating magnet arrays.

  4. Validation of Geothermal Tracer Methods in Highly Constrained Field Experiments

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Project Summary. This project will test smartdiffusive tracers for measuring heat exchange.

  5. Passive Solar Industries Council | Open Energy Information

    Open Energy Info (EERE)

    Passive Solar Industries Council Jump to: navigation, search Name: Passive Solar Industries Council Place: Ashland, OR Information About Partnership with NREL Partnership with NREL...

  6. A short note on passivity, complete passivity and virtual temperatures

    E-Print Network [OSTI]

    Paul Skrzypczyk; Ralph Silva; Nicolas Brunner

    2014-12-17

    We give a simple and intuitive proof that the only states which are completely passive, i.e. those states from which work cannot be extracted even with infinitely many copies, are Gibbs states at positive temperatures. The proof makes use of the idea of virtual temperatures, i.e. the association of temperatures to transitions. We show that (i) passive states are those where every transition is at a positive temperature, and (ii) completely passive states are those where every transition is at the same positive temperature.

  7. The most energetic passive states

    E-Print Network [OSTI]

    Mart Perarnau-Llobet; Karen V. Hovhannisyan; Marcus Huber; Paul Skrzypczyk; Jordi Tura; Antonio Acn

    2015-02-25

    Passive states are defined as those states that do not allow for work extraction in a cyclic (unitary) process. Within the set of passive states, thermal states are the most stable ones: they maximize the entropy for a given energy, and similarly they minimize the energy for a given entropy. In this article we find the passive states lying in the other extreme, i.e., those that maximize the energy for a given entropy, which we show also minimize the entropy when the energy is fixed. These extremal properties make these states useful to obtain fundamental bounds for the thermodynamics of finite dimensional quantum systems, which we show in several scenarios.

  8. Passive $\\mathcal{PT}$-symmetric couplers without complex optical potentials

    E-Print Network [OSTI]

    Lee, Yi-Chan; Chuang, You-Lin; Hsieh, Min-Hsiu; Lee, Ray-Kuang

    2015-01-01

    In addition to the implementation of parity-time ($\\mathcal{PT}$)-symmetric optical systems by carefully and actively controlling the gain and loss, we show that a $2\\times 2$ $\\mathcal{PT}$-symmetric Hamiltonian has a unitarily equivalent representation without complex optical potentials in the resulting optical coupler. Through the Naimark dilation in operator algebra, passive $\\mathcal{PT}$-symmetric couplers can thus be implemented with a refractive index of real values and asymmetric coupling coefficients. This opens up the possibility to implement general $\\mathcal{PT}$-symmetric systems with state-of-the-art asymmetric slab waveguides, dissimilar optical fibers, or cavities with chiral mirrors.

  9. Passive blast pressure sensor

    DOE Patents [OSTI]

    King, Michael J.; Sanchez, Roberto J.; Moss, William C.

    2013-03-19

    A passive blast pressure sensor for detecting blast overpressures of at least a predetermined minimum threshold pressure. The blast pressure sensor includes a piston-cylinder arrangement with one end of the piston having a detection surface exposed to a blast event monitored medium through one end of the cylinder and the other end of the piston having a striker surface positioned to impact a contact stress sensitive film that is positioned against a strike surface of a rigid body, such as a backing plate. The contact stress sensitive film is of a type which changes color in response to at least a predetermined minimum contact stress which is defined as a product of the predetermined minimum threshold pressure and an amplification factor of the piston. In this manner, a color change in the film arising from impact of the piston accelerated by a blast event provides visual indication that a blast overpressure encountered from the blast event was not less than the predetermined minimum threshold pressure.

  10. Tracers and Exploration Technologies | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCEDInstallers/ContractorsPhotovoltaicsState ofSavings forTitle XVIIofTracers and Exploration

  11. Passive Infinite-Dimensional Descriptor Systems

    E-Print Network [OSTI]

    Reis, Timo

    Passive Infinite-Dimensional Descriptor Systems Timo Reis Birgit Jacob 1 Introduction We consider models [12]. In this work, the concept of input-output-passivity (io-passivity) is considered for systems of type (1). Io-passivity means that U = Y and that the real part of the Lebesgue inner product of input

  12. Passive advection in nonlinear medium Michael Chertkov

    E-Print Network [OSTI]

    Chertkov, Mikhael

    Passive advection in nonlinear medium Michael Chertkov Department of Physics, Princeton University, Princeton, New Jersey 08544 Received 23 September 1998; accepted 15 April 1999 Forced advection of passive on velocity, in com- parison with those of advection and nonlinearity, is called passive. The passiveness does

  13. System identification for passive linear quantum systems

    E-Print Network [OSTI]

    Madalin Guta; Naoki Yamamoto

    2014-08-27

    System identification is a key enabling component for the implementation of quantum technologies, including quantum control. In this paper, we consider the class of passive linear input-output systems, and investigate several basic questions: (1) which parameters can be identified? (2) Given sufficient input-output data, how do we reconstruct system parameters? (3) How can we optimize the estimation precision by preparing appropriate input states and performing measurements on the output? We show that minimal systems can be identified up to a unitary transformation on the modes, and systems satisfying a Hamiltonian connectivity condition called "infecting" are completely identifiable. We propose a frequency domain design based on a Fisher information criterion, for optimizing the estimation precision for coherent input state. As a consequence of the unitarity of the transfer function, we show that the Heisenberg limit with respect to the input energy can be achieved using non-classical input states.

  14. Category:Tracer Testing | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmentalBowerbank,CammackFLIR Jump to:RAPID Roadmap ContactRockEuropeTelluricTracer Testing

  15. Tracer Testing at Dixie Valley, Nevada, Using Pyrene Tetrasulfonate...

    Open Energy Info (EERE)

    conducted at the Dixie Valley, Nevada, geothermal reservoir in order to determine fluid-flow processes and to evaluate candidate tracers for use in hydrothermal systems. These...

  16. Validation of Geothermal Tracer Methods in Highly Constrained...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    reactive tracer methods for measuring thermal evolution in CO2-and water-based geothermal reservoirs Fracture Evolution Following a Hydraulic Stimulation within an EGS Reservoir...

  17. Verification of Geothermal Tracer Methods in Highly Constrained...

    Open Energy Info (EERE)

    wells, much of the reservoir is left untapped. Artificial tracers added to the injected water are used to estimate the potential for short circuiting in geothermal reservoirs,...

  18. Passive Evolution of Galaxy Clustering

    E-Print Network [OSTI]

    Hee-Jong Seo; Daniel J. Eisenstein; Idit Zehavi

    2007-12-11

    We present a numerical study of the evolution of galaxy clustering when galaxies flow passively from high redshift, respecting the continuity equation throughout. While passive flow is a special case of galaxy evolution, it allows a well-defined study of galaxy ancestry and serves as an interesting limit to be compared to non-passive cases. We use dissipationless N-body simulations, assign galaxies to massive halos at z=1 and z=2 using various HOD models, and trace these galaxy particles to lower redshift while conserving their number. We find that passive flow results in an asymptotic convergence at low redshift in the HOD and in galaxy clustering on scales above ~3Mpc/h for a wide range of initial HODs. As galaxies become less biased with respect to mass asymptotically with time, the HOD parameters evolve such that M1/Mm decreases while alpha converges toward unity, where Mm is the characteristic halo mass to host a central galaxy, M1 is the halo mass to host one satellite galaxy, and alpha is the power-law index in the halo-mass dependence of the average number of satellites per halo. The satellite populations converge toward the Poisson distribution at low redshift. The convergence is robust for different number densities and is enhanced when galaxies evolve from higher redshift. We compare our results with the observed LRG sample from Sloan Digital Sky Survey that has the same number density. We claim that if LRGs have experienced a strict passive flow, their should be close to a power law with an index of unity in halo mass. Discrepancies could be due to dry galaxy merging or new members arising between the initial and the final redshifts. The spatial distribution of passively flowing galaxies within halos appears on average more concentrated than the halo mass profile at low redshift. (abridged)

  19. An Update on Passive Correctors for the SSC Dipole Magnets

    E-Print Network [OSTI]

    Green, M.A.

    2011-01-01

    Report on the Fermilab Passive Superconductor Test", ICFAOne Meter Long Dipole Magnets Using Passive Superconductor",H. E. Fisk, "The Idea of Passive Superconductor correction",

  20. INSTRUCTIONS FOR OPERATING LBL PASSIVE ENVIRONMENTAL RADON NOMITOR (PERM)

    E-Print Network [OSTI]

    Boegel, M.L.

    2010-01-01

    LBL PASSIVE ENVIRONMENTAL RADON MONITOR (PERM) HASTH M. L.LBL PASSIVE ENVIRONMENTAL RADON MONITOR (PERM) M.L. Boegel,LBL PASSIVE ENVIRONMENTAL RADON MONITOR (PERM) CONTENTS:

  1. HUMAN CONFORT AND AUXILIARY CONTROL CONSIDERATIONS IN PASSIVE SOLAR STRUCTURES

    E-Print Network [OSTI]

    Place, Wayne

    2012-01-01

    area for the base passive building, the performance ofcon- temporary passive design, the building's pro- portions,Comfort in Passive Solar Heated Buildings." Los Alamos

  2. NATURAL CONVECTION IN PASSIVE SOLAR BUILDINGS: EXPERIMENTS, ANALYSIS AND RESULTS

    E-Print Network [OSTI]

    Gadgil, Ashok; Bauman, Fred; Kammerud, Ronald

    2008-01-01

    CONVECTION IN PASSIVE SOLAR BUILDINGS: ANALYSIS AND RESULTSCONVECTION IN PASSIVE SOLAR BUILDINGS: EXPERIMENTS, ANALYSISin a direct gain passive solar building; this is described

  3. A Really Good Hammer: Quantification of Mass Transfer Using Perfluorocarbon Tracers (475th Brookhaven Lecture)

    SciTech Connect (OSTI)

    Watson, Tom

    2012-02-15

    Brookhaven Labs perfluorocarbon tracer (PFT) technology can be viewed as a hammer looking for nails. But, according to Tom Watson, leader of the Labs Tracer Technology Group in the Environmental Research and Technology Division (ERTD), Its a really good hammer! The colorless, odorless and safe gases have a number of research uses, from modeling how airborne contaminants might move through urban canyons to help first responders plan their response to potential terrorist attacks and accidents to locating leaks in underground gas pipes. Their extremely low background level detectable at one part per quadrillion allows their transport to be easily tracked. Lab researchers used PFTs during the 2005 Urban Dispersion Program field studies in New York City, gathering data to help improve models of how a gas or chemical release might move around Manhattans tall buildings and canyons. Closer to home, scientists also used PFTs to make ventilation measurements in Bldg. 400 on the Lab site to provide data to test air flow models used in determining the effects of passive and active air exchange on the levels of indoor and outdoor air pollution, and to determine the effects of an accidental or intentional release of hazardous substances in or around buildings.

  4. Comparing New-Technology Passive Warming Versus Traditional Passive Warming Methods for Optimizing Perioperative Body Core Temperature

    E-Print Network [OSTI]

    Bender, M; Self, B; Schroeder, E; Giap, B

    2015-01-01

    BCG Medical provided the new-technology passive warmingpersonal copy Comparing New-Technology Passive Warmingreducing hypothermia. New-technology passive warming holds

  5. MEAN MONTHLY PERFORMANCE OF PASSIVE SOLAR HEATERS

    E-Print Network [OSTI]

    Place, W.

    2011-01-01

    PERFORMANCE OF PASSIVE SOLAR WATER HEATERS W. Place, M.PERFORMANCE OF PASSIVE SOLAR WATER HEATERS* We Place, M.The Performance of Solar Water Heaters with Natu)""al

  6. MEAN MONTHLY PERFORMANCE OF PASSIVE SOLAR HEATERS

    E-Print Network [OSTI]

    Place, W.

    2011-01-01

    I For the compact heater, the solar absorption rate equalsPERFORMANCE OF PASSIVE SOLAR WATER HEATERS W. Place, M.PERFORMANCE OF PASSIVE SOLAR WATER HEATERS* We Place, M.

  7. ReviewCapture Passive Active

    E-Print Network [OSTI]

    Mankoff, Jennifer

    wearable sensors such as a camera, audio recorder, GPS logger, accelerometer, passive infrared, light, and temperature sensors. Automatically suggest cues from lifelog data based on content and context analysis Memory Impairment evaluation results problem Episodic memory impairment is common for over 26 million

  8. Hood River Passive House, Hood River, Oregon (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-02-01

    The Hood River Passive Project was developed by Root Design Build of Hood River Oregon using the Passive House Planning Package (PHPP) to meet all of the requirements for certification under the European Passive House standards. The Passive House design approach has been gaining momentum among residential designers for custom homes and BEopt modeling indicates that these designs may actually exceed the goal of the U.S. Department of Energy's (DOE) Building America program to "reduce home energy use by 30%-50%" (compared to 2009 energy codes for new homes). This report documents the short term test results of the Shift House and compares the results of PHPP and BEopt modeling of the project. The design includes high R-Value assemblies, extremely tight construction, high performance doors and windows, solar thermal DHW, heat recovery ventilation, moveable external shutters and a high performance ductless mini-split heat pump. Cost analysis indicates that many of the measures implemented in this project did not meet the BA standard for cost neutrality. The ductless mini-split heat pump, lighting and advanced air leakage control were the most cost effective measures. The future challenge will be to value engineer the performance levels indicated here in modeling using production based practices at a significantly lower cost.

  9. Use of Tracers to Characterize Fractures in Engineered Geothermal Systems

    Broader source: Energy.gov [DOE]

    Project Objectives: Measure interwell fracture surface area and fracture spacing using sorbing tracers; measure fracture surface areas adjacent to a single geothermal well using tracers and injection/backflow techniques; design, fabricate and test a downhole instrument for measuring fracture flow following a hydraulic stimulation experiment.

  10. How to Make Theoretically Passive Reduced-Order Models Passive in Practice

    E-Print Network [OSTI]

    California at Davis, University of

    1 How to Make Theoretically Passive Reduced-Order Models Passive in Practice Zhaojun Bai Peter- stable and non-passive models even when such outcomes are theoretically proven to be impossibleMPVL that, even in practice, is guaranteedto produce stable and passive models for all the circuits

  11. Tips: Passive Solar Heating and Cooling | Department of Energy

    Office of Environmental Management (EM)

    Passive Solar Heating and Cooling Tips: Passive Solar Heating and Cooling July 27, 2014 - 4:18pm Addthis Tips: Passive Solar Heating and Cooling Using passive solar design to heat...

  12. PASSIVE FEEDFORWARD APPROACH TO BILATERAL TELEOPERATED MANIPULATORS

    E-Print Network [OSTI]

    Li, Perry Y.

    PASSIVE FEEDFORWARD APPROACH TO BILATERAL TELEOPERATED MANIPULATORS #3; Perry Y. Li + and Dongjun bilateral teleoperated manipulator system which ensures that the closed loop system is energetically passive, and that the coupling between the system and any strictly passive environment is stable. The control objective

  13. Passive Scalar Evolution in Peripheral Region

    E-Print Network [OSTI]

    Fominov, Yakov

    Passive Scalar Evolution in Peripheral Region V. V. Lebedev Landau Institute for Theoretical investigate the passive scalar (concentration of pollutants or temperature) evolution in the random (turbulent stages of the passive scalar homogenization (decay). There are some peculiarities of the decay related

  14. Imaging passive seismic data Brad Artman

    E-Print Network [OSTI]

    Imaging passive seismic data Brad Artman brad@sep.stanford.edu Submitted to Geophysics March 2005, CA 94305-2215 ABSTRACT Passive seismic imaging is the process of synthesizing the wealth to produce a subsurface image. For passively acquired data, migration is even more important than for active

  15. Cope's Rule & Passive versus Driven Trends

    E-Print Network [OSTI]

    Cope's Rule & Passive versus Driven Trends Key concepts Traditional explanations of Cope's Rule clade Evolutionary trends can be either passive or driven (or some combination of both). As a clade diversifies passively the mean increases while the minimum is unchanged. In a driven trend both the mean

  16. Methods and systems using encapsulated tracers and chemicals for reservoir interrogation and manipulation

    DOE Patents [OSTI]

    Roberts, Jeffery; Aines, Roger D; Duoss, Eric B; Spadaccini, Christopher M

    2014-11-04

    An apparatus, method, and system of reservoir interrogation. A tracer is encapsulating in a receptacle. The receptacle containing the tracer is injected into the reservoir. The tracer is analyzed for reservoir interrogation.

  17. National Biomedical Tracer Facility. Project definition study

    SciTech Connect (OSTI)

    Schafer, R.

    1995-02-14

    We request a $25 million government-guaranteed, interest-free loan to be repaid over a 30-year period for construction and initial operations of a cyclotron-based National Biomedical Tracer Facility (NBTF) in North Central Texas. The NBTF will be co-located with a linear accelerator-based commercial radioisotope production facility, funded by the private sector at approximately $28 million. In addition, research radioisotope production by the NBTF will be coordinated through an association with an existing U.S. nuclear reactor center that will produce research and commercial radioisotopes through neutron reactions. The combined facilities will provide the full range of technology for radioisotope production and research: fast neutrons, thermal neutrons, and particle beams (H{sup -}, H{sup +}, and D{sup +}). The proposed NBTF facility includes an 80 MeV, 1 mA H{sup -} cyclotron that will produce proton-induced (neutron deficient) research isotopes.

  18. Passive solar design handbook. Volume III. Passive solar design analysis

    SciTech Connect (OSTI)

    Jones, R.W.; Balcomb, J.D.; Kosiewicz, C.E.; Lazarus, G.S.; McFarland, R.D.; Wray, W.O.

    1982-07-01

    Simple analytical methods concerning the design of passive solar heating systems are presented with an emphasis on the average annual heating energy consumption. Key terminology and methods are reviewed. The solar load ratio (SLR) is defined, and its relationship to analysis methods is reviewed. The annual calculation, or Load Collector Ratio (LCR) method, is outlined. Sensitivity data are discussed. Information is presented on balancing conservation and passive solar strategies in building design. Detailed analysis data are presented for direct gain and sunspace systems, and details of the systems are described. Key design parameters are discussed in terms of their impact on annual heating performance of the building. These are the sensitivity data. The SLR correlations for the respective system types are described. The monthly calculation, or SLR method, based on the SLR correlations, is reviewed. Performance data are given for 9 direct gain systems and 15 water wall and 42 Trombe wall systems. (LEW)

  19. Environmental Tracers for Determining Water Resource Vulnerability to Climate Change

    SciTech Connect (OSTI)

    Singleton, M

    2009-07-08

    Predicted changes in the climate will have profound impacts on water availability in the Western US, but large uncertainties exist in our ability to predict how natural and engineered hydrological systems will respond. Most predictions suggest that the impacts of climate change on California water resources are likely to include a decrease in the percentage of precipitation that falls as snow, earlier onset of snow-pack melting, and an increase in the number of rain on snow events. These processes will require changes in infrastructure for water storage and flood control, since much of our current water supply system is built around the storage of winter precipitation as mountain snow pack. Alpine aquifers play a critical role by storing and releasing snowmelt as baseflow to streams long after seasonal precipitation and the disappearance of the snow pack, and in this manner significantly impact the stream flow that drives our water distribution systems. Mountain groundwater recharge and, in particular, the contribution of snowmelt to recharge and baseflow, has been identified as a potentially significant effect missing from current climate change impact studies. The goal of this work is to understand the behavior of critical hydrologic systems, with an emphasis on providing ground truth for next generation models of climate-water system interactions by implementing LLNL capabilities in environmental tracer and isotopic science. We are using noble gas concentrations and multiple isotopic tracers ({sup 3}H/{sup 3}He, {sup 35}S, {sup 222}Rn, {sup 2}H/{sup 1}H, {sup 18}O/{sup 16}O, and {sup 13}C/{sup 12}C) in groundwater and stream water in a small alpine catchment to (1) provide a snapshot of temperature, altitude, and physical processes at the time of recharge, (2) determine subsurface residence times (over time scales ranging from months to decades) of different groundwater age components, and (3) deconvolve the contribution of these different groundwater components to alpine stream baseflow. This research is showing that groundwater in alpine areas spends between a few years to several decades in the saturated zone below the surface, before feeding into streams or being pumped for use. This lag time may act to reduce the impact on water resources from extreme wet or dry years. Furthermore, our measurements show that the temperature of water when it reaches the water table during recharge is 4 to 9 degrees higher than would be expected for direct influx of snowmelt, and that recharge likely occurs over diffuse vegetated areas, rather than along exposed rock faces and fractures. These discoveries have implications for how alpine basins will respond to climate effects that lead to more rain than snow and earlier snow pack melting.

  20. Driven active and passive nematics

    E-Print Network [OSTI]

    Sumesh P. Thampi; Ramin Golestanian; Julia M. Yeomans

    2015-04-25

    We investigate similarities in the micro-structural dynamics between externally driven and actively driven nematics. Walls, lines of strong deformations in the director field, and topological defects are characteristic features of an active nematic. Similar structures form in driven passive nematics when there are inhomogeneities in imposed velocity gradients due to non-linear flow fields or geometrical constraints. Specifically, pressure driven flow of a tumbling passive nematic in an expanding-contracting channel produces walls and defects similar to those seen in active nematics. We also study the response of active nematics to external driving, confirming that imposed shear suppresses the hydrodynamic instabilities. We show that shear fields can lead to wall alignments and the localisation of active turbulence.

  1. Enhanced Attenuation Technologies: Passive Soil Vapor Extraction

    SciTech Connect (OSTI)

    Vangelas, K.; Looney, B.; Kamath, R.; Adamson, D.; Newell, C.

    2010-03-15

    Passive soil vapor extraction (PSVE) is an enhanced attenuation (EA) approach that removes volatile contaminants from soil. The extraction is driven by natural pressure gradients between the subsurface and atmosphere (Barometric Pumping), or by renewable sources of energy such as wind or solar power (Assisted PSVE). The technology is applicable for remediating sites with low levels of contamination and for transitioning sites from active source technologies such as active soil vapor extraction (ASVE) to natural attenuation. PSVE systems are simple to design and operate and are more cost effective than active systems in many scenarios. Thus, PSVE is often appropriate as an interim-remedial or polishing strategy. Over the past decade, PSVE has been demonstrated in the U.S. and in Europe. These demonstrations provide practical information to assist in selecting, designing and implementing the technology. These demonstrations indicate that the technology can be effective in achieving remedial objectives in a timely fashion. The keys to success include: (1) Application at sites where the residual source quantities, and associated fluxes to groundwater, are relatively low; (2) Selection of the appropriate passive energy source - barometric pumping in cases with a deep vadose zone and barrier (e.g., clay) layers that separate the subsurface from the atmosphere and renewable energy assisted PSVE in other settings and where higher flow rates are required. (3) Provision of sufficient access to the contaminated vadose zones through the spacing and number of extraction wells. This PSVE technology report provides a summary of the relevant technical background, real-world case study performance, key design and cost considerations, and a scenario-based cost evaluation. The key design and cost considerations are organized into a flowchart that dovetails with the Enhanced Attenuation: Chlorinated Organics Guidance of the Interstate Technology and Regulatory Council (ITRC). The PSVE flowchart provides a structured process to determine if the technology is, or is not, reasonable and defensible for a particular site. The central basis for that decision is the expected performance of PSVE under the site specific conditions. Will PSVE have sufficient mass removal rates to reduce the release, or flux, of contamination into the underlying groundwater so that the site can meet it overall remedial objectives? The summary technical information, case study experiences, and structured decision process provided in this 'user guide' should assist environmental decision-makers, regulators, and engineers in selecting and successfully implementing PSVE at appropriate sites.

  2. Quantum Dot Tracers for Use in Engineered Geothermal Systems

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. Project objective: To develop and demonstrate a new class of tracers?semiconductor nanoparticles(quantum dots)?that offer great promise for use in characterizing fracture networks in EGS reservoirs.

  3. Preliminary Investigation of Tracer Gas Reaeration Method for Shallow Bays

    E-Print Network [OSTI]

    Baker, Sarah H.; Holley, Edward R.

    1987-01-01

    Accurate estimates of surface exchange rates for volatile pollutants in bays are needed to allow predictions of pollutant movement and retention time. The same types of estimates can be used to calculate reaeration rates. The tracer gas technique...

  4. Microfluidic Investigation of Tracer Dye Diffusion in Alumina Nanofluids

    E-Print Network [OSTI]

    Ozturk, Serdar 1979-

    2012-10-05

    on enhanced mass diffusion and the possibility of tailoring mass transport by direct manipulation of molecular diffusion. Therefore, a microfluidic approach capable of directly probing tracer diffusion between nanoparticle-laden fluid streams was developed...

  5. Tracer advection by steady groundwater flow in a stratified aquifer

    SciTech Connect (OSTI)

    Sposito, Garrison; Weeks, Scott W.

    1997-01-02

    The perfectly stratified aquifer has often been investigated as a simple, tractable model for exploring new theoretical issues in subsurface hydrology. Adopting this approach, we show that steady groundwater flows in the perfectly stratified aquifer are always confined to a set of nonintersecting permanent surfaces, on which both streamlines and vorticity lines lie. This foliation of the flow domain exists as well for steady groundwater flows in any isotropic, spatially heterogeneous aquifer. In the present model example it is a direct consequence of the existence of a stream function, we then demonstrate that tracer plume advection by steady groundwater flow in a perfectly stratified aquifer is never ergodic, regardless of the initial size of the tracer plume. This nonergodicity, which holds also for tracer advection in any isotropic, spatially heterogeneous aquifer, implies that stochastic theories of purely advective tracer plume movement err in assuming ergodic behavior to simplify probabilistic calculations of plume spatial concentration moments.

  6. A Tracer Test Using Ethanol as a Two-Phase Tracer and 2-Naphthalene

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAand Dalton JumpProgram |RecentSulfonate as a Liquid-Phase Tracer at the

  7. A Spreadsheet Program for Two-Well Tracer Test Data Analysis

    SciTech Connect (OSTI)

    Tang, Guoping [ORNL; Watson, David [ORNL; Parker, Jack C. [University of Tennessee, Knoxville (UTK); Brooks, Scott C [ORNL

    2011-01-01

    Two-well tracer tests are often conducted to investigate subsurface solute transport in the field. Analyzing breakthrough curves in extraction and monitoring wells using numerical methods is nontrivial due to highly nonuniform flow conditions. We extended approximate analytical solutions for the advection-dispersion equation for an injection-extraction well doublet in a homogeneous confined aquifer under steady-state flow conditions for equal injection and extraction rates with no transverse dispersion and negligible ambient flow, and implemented the solutions in Microsoft Excel using Visual Basic for Application (VBA). Functions were implemented to calculate concentrations in extraction and monitoring wells at any location due to a step or pulse injection. Type curves for a step injection were compared with those calculated by numerically integrating the solution for a pulse injection. The results from the two approaches are similar when the dispersivity is small. As the dispersivity increases, the latter was found to be more accurate but requires more computing time. The code was verified by comparing the results with published-type curves and applied to analyze data from the literature. The method can be used as a first approximation for two-well tracer test design and data analysis, and to check accuracy of numerical solutions. The code and example files are publicly available.

  8. Passive solar in China: traditional and new

    SciTech Connect (OSTI)

    Balcomb, J.D.; Balcomb, S.A.

    1986-04-01

    The authors' observations of a tradition of passive solar architecture in northern China are described. Tendencies for modern buildings to depart from this tradition are noted. Major passive solar research programs are discussed and experimental buildings are illustrated. It is concluded that the Chinese could realize a major advantage by combining their strong tradition of passive solar architecture with modern insulation methods and improved glazing systems.

  9. Gap between active and passive solar heating

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1985-01-01

    The gap between active and passive solar could hardly be wider. The reasons for this are discussed and advantages to narrowing the gap are analyzed. Ten years of experience in both active and passive systems are reviewed, including costs, frequent problems, performance prediction, performance modeling, monitoring, and cooling concerns. Trends are analyzed, both for solar space heating and for service water heating. A tendency for the active and passive technologies to be converging is observed. Several recommendations for narrowing the gap are presented.

  10. Physics of passive solar buildings

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1981-01-01

    Primary emphasis in the paper is on methods of characterizing and analyzing passive solar buildings. Simplifying assumptions are described which make this analysis tractable without compromising significant accuracy or loss of insight into the basic physics of the situation. The overall nature of the mathematical simulation approach is described. Validation procedures based on data from test rooms and monitored buildings are outlined. Issues of thermal comfort are discussed. Simplified methods of analysis based on correlation procedures are reported and the nature of the economic conservation-solar optimization process is explored. Future trends are predicted.

  11. Resuspension rates from aged inert-tracer sources

    SciTech Connect (OSTI)

    Sehmel, G.A.

    1982-11-01

    Wind-caused particle resuspension rates were investigated with molybdenum tracers at two circular resuspension sites in the Hanford area. The tracer particles were calcium molybdate. The radii of each circular tracer-source area were 22.9 m and 29.9 m respectively for tracer deposited on 2 October 1973 and 29 May 1979. Resuspension rates were investigated by sampling resuspended tracer with air sampling equipment mounted as a function of height on a centrally located sampling tower at each site. Sampling equipment was operated as a function of wind speed increments in order to investigate resuspension rates, wind speed dependencies of resuspension rates, and for subsequent comparisons of resuspension rate changes as a function of time for constant wind speed ranges. Experimental results are reported for measurements over several years. Resuspension rates ranged from about 10/sup -13/ to 10/sup -6/ fraction of the tracer source resuspended per second. Resuspension rates tended to increase with increasing wind speed. At one investigation site, resuspension rates were nearly constant, except for seasonal variations, for a four-year time period. Resuspension rates appear higher in the autumn than in the spring and summer.

  12. Rules of thumb for passive solar heating

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1980-01-01

    Rules of thumb are given for passive solar systems for: (1) sizing solar glazing for 219 cities, (2) sizing thermal storage mass, and (3) building orientation.

  13. HYDROGEL TRACER BEADS: THE DEVELOPMENT, MODIFICATION, AND TESTING OF AN INNOVATIVE TRACER FOR BETTER UNDERSTANDING LNAPL TRANSPORT IN KARST AQUIFERS

    SciTech Connect (OSTI)

    Amanda Laskoskie, Harry M. Edenborn, and Dorothy J. Vesper

    2012-01-01

    The goal of this specific research task is to develop proxy tracers that mimic contaminant movement to better understand and predict contaminant fate and transport in karst aquifers. Hydrogel tracer beads are transported as a separate phase than water and can used as a proxy tracer to mimic the transport of non-aqueous phase liquids (NAPL). They can be constructed with different densities, sizes & chemical attributes. This poster describes the creation and optimization of the beads and the field testing of buoyant beads, including sampling, tracer analysis, and quantitative analysis. The buoyant beads are transported ahead of the dissolved solutes, suggesting that light NAPL (LNAPL) transport in karst may occur faster than predicted from traditional tracing techniques. The hydrogel beads were successful in illustrating this enhanced transport.

  14. Advances in passive neutron instruments for safeguards use

    SciTech Connect (OSTI)

    Menlove, H.O.; Krick, M.S.; Langner, D.G.; Miller, M.C.; Stewart, J.E.

    1994-02-01

    Passive neutron and other nondestructive assay techniques have been used extensively by the International Atomic Energy Agency to verify plutonium metal, powder, mixed oxide, pellets, rods, assemblies, scrap, and liquids. Normally, the coincidence counting rate is used to measure the {sup 240}Pu-effective mass and gamma-ray spectrometry or mass spectrometry is used to verify the plutonium isotopic ratios. During the past few years, the passive neutron detectors have been installed in plants and operated in the unattended/continuous mode. These radiation data with time continuity have made it possible to use the totals counting rate to monitor the movement of nuclear material. Monte Carlo computer codes have been used to optimize the detector designs for specific applications. The inventory sample counter (INVS-III) has been designed to have a higher efficiency (43%) and a larger uniform counting volume than the original INVS. Data analyses techniques have been developed, including the ``known alpha`` and ``known multiplication`` methods that depend on the sample. For scrap and other impure or poorly characterized samples, we have developed multiplicity counting, initially implemented in the plutonium scrap multiplicity counter. For large waste containers such as 200-L drums, we have developed the add-a-source technique to give accurate corrections for the waste-matrix materials. This paper summarizes recent developments in the design and application of passive neutron assay systems.

  15. Passive Microwave Systems (Rees Chapter 7)

    E-Print Network [OSTI]

    Sandwell, David T.

    Passive Microwave Systems (Rees Chapter 7) At wavelengths greater than about 2 cm and less than 10 radiation from the Earth dominates". Microwaves penetrate clouds and since the signal is from thermal emissions, passive microwave measurements can be made in all weather and in daytime or nighttime

  16. Passive ice freezing-releasing heat pipe

    DOE Patents [OSTI]

    Gorski, Anthony J. (Lemont, IL); Schertz, William W. (Batavia, IL)

    1982-01-01

    A heat pipe device has been developed which permits completely passive ice formation and periodic release of ice without requiring the ambient temperature to rise above the melting point of water. This passive design enables the maximum amount of cooling capacity to be stored in the tank.

  17. Roots, States, and Stative Passives David Embick

    E-Print Network [OSTI]

    Embick, David

    with Stative Passive formation; and (ii) whether building Target State meanings into (certain) RootsRoots, States, and Stative Passives David Embick University of Pennsylvania ***** Roots Workshop be part of a Root's meaning, by BT:R PLAN: Reexamine/reanalyze the generalizations that building Target

  18. Experimentally Determining Passivity Indices: Theory and Simulation

    E-Print Network [OSTI]

    Antsaklis, Panos

    at the University of Notre Dame ISIS-2013-002 Abstract The passivity index framework is an alternative method of characterizing energy dissipation in systems. As an analysis tool, it can be used to assess the level. Particularly, we consider testing passivity indices for vehicle systems with the adaptive cruise control (ACC

  19. Global longterm passive microwave satellitebased retrievals of vegetation optical depth

    E-Print Network [OSTI]

    Evans, Jason

    Global longterm passive microwave satellitebased retrievals of vegetation optical depth Yi Y. Liu,1 optical depth (VOD) retrievals from three satellitebased passive microwave instruments were merged longterm passive microwave satellitebased retrievals of vegetation optical depth, Geophys. Res. Lett., 38

  20. INCREMENTAL COOLING LOAD DETERMINATION FOR PASSIVE DIRECT GAIN HEATING SYSTEMS

    E-Print Network [OSTI]

    Sullivan, Paul W.

    2013-01-01

    an increment of 1 ft to a passive building in each of the 25Passive and Hybrid Division, of the Office of Solar Applica- tions for Buildings,building thermal dynamics including features of particular interest, such as passive

  1. Passive Solar Building Design Basics | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    The difference between a passive solar home and a conventional home is design. Passive solar homes and other buildings are designed to take advantage of the local climate. Passive...

  2. Passive States for Essential Observers

    E-Print Network [OSTI]

    Robert Strich

    2008-01-23

    The aim of this note is to present a unified approach to the results given in \\cite{bb99} and \\cite{bs04} which also covers examples of models not presented in these two papers (e.g. $d$-dimensional Minkowski space-time for $d\\geq 3$). Assuming that a state is passive for an observer travelling along certain (essential) worldlines, we show that this state is invariant under the isometry group, is a KMS-state for the observer at a temperature uniquely determined by the structure constants of the Lie algebra involved and fulfills (a variant of) the Reeh-Schlieder property. Also the modular objects associated to such a state and the observable algebra of an observer are computed and a version of weak locality is examined.

  3. Comparing New-Technology Passive Warming Versus Traditional Passive Warming Methods for Optimizing Perioperative Body Core Temperature

    E-Print Network [OSTI]

    Bender, M; Self, B; Schroeder, E; Giap, B

    2015-01-01

    provided the new-technology passive warming devices (Opt-on the most effective passive warming method to improve theComparing New-Technology Passive Warming Versus Traditional

  4. Low Cost Manufacturable Microchannel Systems for Passive PEM...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Low Cost Manufacturable Microchannel Systems for Passive PEM Water Management Low Cost Manufacturable Microchannel Systems for Passive PEM Water Management Part of a 100 million...

  5. Low-Cost Manufacturable Microchannel Systems for Passive PEM...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Low-Cost Manufacturable Microchannel Systems for Passive PEM Water Management Low-Cost Manufacturable Microchannel Systems for Passive PEM Water Management This presentation, which...

  6. Yahoo! Compute Coop Next Generation Passive Cooling Design for...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Yahoo Compute Coop Next Generation Passive Cooling Design for Data Centers Yahoo Compute Coop Next Generation Passive Cooling Design for Data Centers yahoopassivecooling.pdf...

  7. Optimization of an Advanced Passive/Active Diesel Emission Control...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    an Advanced PassiveActive Diesel Emission Control System Optimization of an Advanced PassiveActive Diesel Emission Control System Evaluation of PM exhaust aftertreatment...

  8. Radiograph and passive data analysis using mixed variable optimization...

    Office of Scientific and Technical Information (OSTI)

    Patent: Radiograph and passive data analysis using mixed variable optimization Citation Details In-Document Search Title: Radiograph and passive data analysis using mixed variable...

  9. Integration of Full Tensor Gravity and ZTEM Passive Low Frequency...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Full Tensor Gravity and ZTEM Passive Low Frequency EM Instruments for Simultaneous Data Acquisition Integration of Full Tensor Gravity and ZTEM Passive Low Frequency EM Instruments...

  10. Evaluation of Passive and Active Soot Filters for Removal of...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Passive and Active Soot Filters for Removal of Particulate Emissions from Diesel Engines Evaluation of Passive and Active Soot Filters for Removal of Particulate Emissions from...

  11. A Revealing Look Inside Passive and Active DPF Regeneration:...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    A Revealing Look Inside Passive and Active DPF Regeneration: In-Situ Optical Analysis of Ash Formation and Transport A Revealing Look Inside Passive and Active DPF Regeneration:...

  12. Passive environmental temperature control system

    DOE Patents [OSTI]

    Corliss, John M. (Columbus, OH); Stickford, George H. (Columbus, OH)

    1981-01-01

    Passive environmental heating and cooling systems are described, which utilize heat pipes to transmit heat to or from a thermal reservoir. In a solar heating system, a heat pipe is utilized to carry heat from a solar heat absorber plate that receives sunlight, through a thermal insulation barrier, to a heat storage wall, with the outer end of the pipe which is in contact with the solar absorber being lower than the inner end. The inclining of the heat pipe assures that the portion of working fluid, such as Freon, which is in a liquid phase will fall by gravity to the outer end of the pipe, thereby assuring diode action that prevents the reverse transfer of heat from the reservoir to the outside on cool nights. In a cooling system, the outer end of the pipe which connects to a heat dissipator, is higher than the inner end that is coupled to a cold reservoir, to allow heat transfer only out of the reservoir to the heat dissipator, and not in the reverse direction.

  13. The Future of Passive Solar in Industry

    E-Print Network [OSTI]

    Wulfinghoff, D. R.

    1985-01-01

    Passive solar is a family of techniques for the direct use of sunlight for illumination and heating. Industrial facilities have characteristics which particularly favor the use of these techniques. This paper examines ...

  14. Passive machine augmented composite for multifunctional properties

    E-Print Network [OSTI]

    Kim, Jong Hyun

    2005-11-01

    This dissertation studies by experiment and numerical analysis an advanced composite material (Machine Augmented Composite or MAC) for enhancement of the passive damping while maintaining its stiffness. This MAC is composed of a pre-buckled wall...

  15. The Soil Moisture Active Passive (SMAP) Mission

    E-Print Network [OSTI]

    Entekhabi, Dara

    The Soil Moisture Active Passive (SMAP) mission is one of the first Earth observation satellites being developed by NASA in response to the National Research Council's Decadal Survey. SMAP will make global measurements of ...

  16. Guide to Passive Solar Home Design

    SciTech Connect (OSTI)

    2010-10-01

    Passive solar design incorporates features in your home and its natural surroundings that harness the sun's low rays in winter and deflect the sun's high rays in the summer.

  17. Energy savings obtainable through passive solar techniques

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1980-01-01

    A passive solar energy system is one in which the thermal energy flow is by natural means, that is by radiation, conduction, or natural convection. The purpose of the paper is to provide a survey of passive solar heating experience, especially in the US. Design approaches are reviewed and examples shown. Misconceptions are discussed. Advantages are listed. The Los Alamos program of performance simulation and evaluation is described and a simplified method of performance estimation is outlined.

  18. COS: A new tracer to constrain photosynthetic CO2 fluxes

    E-Print Network [OSTI]

    Einat, Aharonov

    COS: A new tracer to constrain photosynthetic CO2 fluxes Dan Yakir1, Max Berkelhammer2, Hulin Chen2 COS (110-190) Indirect CS2, DMS (149-330) Unknown (~600) Stratosphere COSSO2 OH uptake (82-110) Global COS Budget (Gg S a-1; Kettle et al., 2002; Montzka et al., 2007; Berry et al., 2013 ) Mean

  19. THE EFFECT OF TRANSVERSE MIXING ON TRACER DISPERSION

    E-Print Network [OSTI]

    Stanford University

    Hardware Data Acquisition And Analysis Software Experimental Procedure Analysis Procedure Results: Taylor. The theoretical response for linear Taylor dispersion was matched to the data to determine the non-linear Of Tracer Valve Constant-pressure Reservoir Design Schematic Drawing Of Electrode Circuit Results: Run 16

  20. Analysis of Tracer Dispersion During a Prescribed Forest Burn

    E-Print Network [OSTI]

    Collins, Gary S.

    to manage global warming (Wiedinmyer, 2010) As land managers consider increased burning, air quality our understanding of pollutant emission rates associated with prescribed forest burns. Methods Site tracer and pollutant dispersion patterns. Modeling The WindTrax stochastic particle dispersion model

  1. Calibration of hydraulic and tracer tests in fractured media

    E-Print Network [OSTI]

    Politcnica de Catalunya, Universitat

    Calibration of hydraulic and tracer tests in fractured media represented by a DFN Model L. D. Donado, X. Sanchez-Vila, E. Ruiz* & F. J. Elorza** * Enviros Spain S.L. ** UPM #12;Fractured Media Water flows through fractures (matrix basically impervious though relevant to transport) Fractures at all

  2. Dispersivity estimates from a tracer experiment in a sandy aquifer

    SciTech Connect (OSTI)

    Mallants, D.; Espino, A.; Van Hoorick, M.; Feyen, J.; Vandenberghe, N.; Loy, W.

    2000-04-01

    The success or failure of transport models in predicting the migration of a contaminant plume is ground water depends to a large extent on the quality of flow and transport parameters used. In this study, the authors investigate the spatial variability in the tracer velocity and dispersivity in a shallow sandy aquifer in northern Belgium. Based on hydraulic conductivity measurements on cores sampled along a vertical profile, the aquifer was found to be mildly heterogeneous, i.e., with the variance of the log-transformed conductivity K, {sigma}{sup 2}{sub lnK}, equal to 0.22. By means of a natural gradient tracer experiment, transport of a chloride tracer was investigated in a three-dimensional network of multilevel point samplers (MLS). Least squares fitting of a two-dimensional transport model to the individual breakthrough curves resulted in an average longitudinal dispersivity that was 10 times larger than the transverse dispersivity. The results further showed the existence of a dispersion-scale effect whereby the depth-averaged longitudinal dispersivity increases with increasing travel distance. The average longitudinal dispersivity corresponding to a travel distance of 10 m was equal to 0.2 m. The authors finally show that theoretical expressions for the macroscopic dispersivity tensor, which require input on hydraulic conductivity heterogeneity, could be used here to approximate the observed dispersive behavior. These conceptually simple models are useful to estimate macroscopic dispersivities when no tracer data are available.

  3. Semi-Passive Replication Xavier Defago Andre Schiper Nicole Sergent

    E-Print Network [OSTI]

    Défago, Xavier

    Semi-Passive Replication Xavier D´efago Andr´e Schiper Nicole Sergent D´epartement d This paper presents the semi-passive replication tech- nique ­ a variant of passive replication ­ that can on a primary. Passive replication is a popular replication technique since it can tolerate non

  4. Passive and Active Flow Control by Swimming Fishes and Mammals

    E-Print Network [OSTI]

    Lauder, George V.

    Passive and Active Flow Control by Swimming Fishes and Mammals F.E. Fish1 and G.V. Lauder2 1 the body and appendages both passively and actively. Passive mechanisms rely on structural hydrodynamics is related largely to flow control. Animals have been hypothesized to control flow both passively

  5. Convective Cooling and Passive Stack Improvements in Motors (Presentation)

    SciTech Connect (OSTI)

    Bennion, K.

    2014-06-01

    This presentation discusses current research at NREL in convective cooling and passive stack improvements in motors.

  6. Passive sources for the Bennett-Brassard 1984 quantum key distribution protocol with practical signals

    E-Print Network [OSTI]

    Marcos Curty; Xiongfeng Ma; Hoi-Kwong Lo; Norbert Ltkenhaus

    2010-09-20

    Most experimental realizations of quantum key distribution are based on the Bennett-Brassard 1984 (so-called BB84) protocol. In a typical optical implementation of this scheme, the sender uses an active source to produce the required BB84 signal states. While active state preparation of BB84 signals is a simple and elegant solution in principle, in practice passive state preparation might be desirable in some scenarios, for instance, in those experimental setups operating at high transmission rates. Passive schemes might also be more robust against side-channel attacks than active sources. Typical passive devices involve parametric down-conversion. In this paper, we show that both coherent light and practical single photon sources are also suitable for passive generation of BB84 signal states. Our method does not require any external-driven element, but only linear optical components and photodetectors. In the case of coherent light, the resulting key rate is similar to the one delivered by an active source. When the sender uses practical single photon sources, however, the distance covered by a passive transmitter might be longer than the one of an active configuration.

  7. High upwind concentrations observed during an upslope tracer event

    SciTech Connect (OSTI)

    Ciolek, J.T. Jr.

    1993-10-01

    In February of 1991 the Rocky Flats Plant conducted twelve tracer experiments to validate an emergency response dispersion model known as the Terrain-Responsive Atmospheric Code (TRAC) (Hodgin 1985). Experimenters released 140 to 260 kilograms of inert tracer gas (sulfur hexafloride) from the plant over an 11 hour period. During each release, one hundred and sixty-five samples, most of which formed concentric rings of 8 and 16 km radius from the plant, recorded cumulative hourly concentrations of the tracer at one meter above ground level (AGL). Figure 1 contains a depiction of the sampler location, the terrain, and the meteorological stations available within the tracer study area. Brown (1991) describes the experimental setup in more detail. The subject of this paper is an event that occurred early in the fifth experiment, on February 9, 1991. In this experiment, tracer material released from 13:00 to 17:00 LST appeared both downwind and upwind of the source, with the highest concentrations upwind. During the fifth experiment, high pressure in Utah produced mostly sunny skis around Rocky Flats. For most of the day, one could find moderate (5 to 10 ms{sup {minus}1}) northerly (from the North) flow within the 700 to 500 mb level of the atmosphere (approximately 3000 to 5500 meters above Mean Sea Level (MSL)). Synoptic scale motions were isolated enough from the surface layer and heating was great enough to produce a 1 km deep upslope flow (flow from the East to the West) by late afternoon. The winds reversed and became downslope at approximately 17:30 LST.

  8. Numerical simulations of radon as an in situ partitioning tracer for quantifying NAPL

    E-Print Network [OSTI]

    Semprini, Lewis

    Numerical simulations of radon as an in situ partitioning tracer for quantifying NAPL contaminationpull partitioning tracer tests using radon-222 to quantify non- aqueous phase liquid contamination. J. Contam. Hydrol. 58, 129146] of pushpull tests using radon as a naturally occurring partitioning tracer

  9. SOURCES AND EFFECTS OF MINING-RELATED AND NATURAL ACID ROCK DRAINAGE QUANTIFIED USING TRACER

    E-Print Network [OSTI]

    Ryan, Joe

    SOURCES AND EFFECTS OF MINING-RELATED AND NATURAL ACID ROCK DRAINAGE QUANTIFIED USING TRACER Acid Rock Drainage Quantified Using Tracer Dilution, Coal Creek Watershed, Gunnison County, Colorado of Mining-Related and Natural Acid Drainage Quantified Using Tracer Dilution, Coal Creek Watershed, Gunnison

  10. Active control of passive acoustic fields: Passive synthetic apertureDoppler beamforming with data from an autonomous

    E-Print Network [OSTI]

    Smith, Jerome A.

    Active control of passive acoustic fields: Passive synthetic apertureDoppler beamforming with data without the use of an active source under control by the receiver. In this passive case, the properties interest. Passive synthetic aperture sonar has no ana- log in the radar community. In contrast

  11. METHODOLOGY FOR PASSIVE ANALYSIS OF A UNIVERSITY INTERNET LINK / TALK 13 Methodology for Passive Analysis of a University

    E-Print Network [OSTI]

    California at San Diego, University of

    METHODOLOGY FOR PASSIVE ANALYSIS OF A UNIVERSITY INTERNET LINK / TALK 13 Methodology for Passive # Abstract--- Passive monitoring of Internet links can e#­ ciently provide valuable data on a wide variety and research questions using our passive measurement methodology. Keywords--- Network Performance Monitoring

  12. Discreet passive explosive detection through 2-sided wave guided fluorescence

    SciTech Connect (OSTI)

    Harper, Ross James; la Grone, Marcus; Fisher, Mark

    2012-10-16

    The current invention provides a passive sampling device suitable for collecting and detecting the presence of target analytes. In particular, the passive sampling device is suitable for detecting nitro-aromatic compounds. The current invention further provides a passive sampling device reader suitable for determining the collection of target analytes. Additionally, the current invention provides methods for detecting target analytes using the passive sampling device and the passive sampling device reader.

  13. Discreet passive explosive detection through 2-sided waveguided fluorescence

    DOE Patents [OSTI]

    Harper, Ross James (Stillwater, OK); la Grone, Marcus (Cushing, OK); Fisher, Mark (Stillwater, OK)

    2011-10-18

    The current invention provides a passive sampling device suitable for collecting and detecting the presence of target analytes. In particular, the passive sampling device is suitable for detecting nitro-aromatic compounds. The current invention further provides a passive sampling device reader suitable for determining the collection of target analytes. Additionally, the current invention provides methods for detecting target analytes using the passive sampling device and the passive sampling device reader.

  14. Research Gaps and Technology Needs in Development of PHM for Passive AdvSMR Components

    SciTech Connect (OSTI)

    Meyer, Ryan M.; Ramuhalli, Pradeep; Coble, Jamie B.; Hirt, Evelyn H.; Mitchell, Mark R.; Wootan, David W.; Berglin, Eric J.; Bond, Leonard J.; Henager, Charles H.

    2014-01-01

    Advanced small modular reactors (AdvSMRs), which are based on modularization of advanced reactor concepts, may provide a longer-term alternative to traditional light-water reactors and near term small modular reactors (SMRs), which are based on integral pressurized water reactor (iPWR) concepts. SMRs are challenged economically due to losses in economy of scale, thus, there is increased motivation to reduce the controllable operations and maintenance (O&M) costs through automation technologies including prognostics health management (PHM) systems. In this regard, PHM systems have the potential to play a vital role in supporting the deployment of AdvSMRs and face several unique challenges with respect to implementation for passive AdvSMR components. This paper presents a summary of a research gaps and technical needs assessment performed for implementation of PHM for passive AdvSMR components. state-of-the-art in PHM.

  15. Research gaps and technology needs in development of PHM for passive AdvSMR components

    SciTech Connect (OSTI)

    Meyer, Ryan M.; Ramuhalli, Pradeep; Hirt, Evelyn H.; Mitchell, Mark R.; Wootan, David W.; Berglin, Eric J.; Henagar, Chuck H. Jr.; Coble, Jamie B.; Bond, Leonard J.

    2014-02-18

    Advanced small modular reactors (AdvSMRs), which are based on modularization of advanced reactor concepts, may provide a longer-term alternative to traditional light-water reactors and near-term small modular reactors (SMRs), which are based on integral pressurized water reactor (iPWR) concepts. SMRs are challenged economically because of losses in economy of scale; thus, there is increased motivation to reduce the controllable operations and maintenance costs through automation technologies including prognostics health management (PHM) systems. In this regard, PHM systems have the potential to play a vital role in supporting the deployment of AdvSMRs and face several unique challenges with respect to implementation for passive AdvSMR components. This paper presents a summary of a research gaps and technical needs assessment performed for implementation of PHM for passive AdvSMR components.

  16. IMPLEMENTING ARRANGEMENT

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergy HeadquartersFuelB IMSofNewsletterGuidingUpdateofMarch 21,LosIMPLEMENTING ARRANGEMENT

  17. Passive Spectroscopic Diagnostics for Magnetically-confined Fusion Plasmas

    SciTech Connect (OSTI)

    Stratton, B. C.; Biter, M.; Hill, K. W.; Hillis, D. L.; Hogan, J. T.

    2007-07-18

    Spectroscopy of radiation emitted by impurities and hydrogen isotopes plays an important role in the study of magnetically-confined fusion plasmas, both in determining the effects of impurities on plasma behavior and in measurements of plasma parameters such as electron and ion temperatures and densities, particle transport, and particle influx rates. This paper reviews spectroscopic diagnostics of plasma radiation that are excited by collisional processes in the plasma, which are termed 'passive' spectroscopic diagnostics to distinguish them from 'active' spectroscopic diagnostics involving injected particle and laser beams. A brief overview of the ionization balance in hot plasmas and the relevant line and continuum radiation excitation mechanisms is given. Instrumentation in the soft X-ray, vacuum ultraviolet, ultraviolet, visible, and near-infrared regions of the spectrum is described and examples of measurements are given. Paths for further development of these measurements and issues for their implementation in a burning plasma environment are discussed.

  18. A Differential Phase Shift Scheme for Quantum Key Distribution in Passive Optical Networks

    E-Print Network [OSTI]

    Michael Hentschel; Andreas Poppe; Bernhard Schrenk; Momtchil Peev; Edwin Querasser; Roland Lieger

    2014-12-19

    We propose a scheme for quantum key distribution (QKD) in a passive optical network (PON) based on differential phase shift (DPS) coding. A centralized station including all expensive components serves many users, making it suitable for a true multi-user network in a local environment with moderate distances on the order of a few kilometers. The emphasis lies on an asymmetric design for cost effective implementation of network end points.

  19. 19.4% -EFFICIENT LARGE AREA REAR-PASSIVATED SCREEN-PRINTED SILICON SOLAR CELLS T. Dullweber*1

    E-Print Network [OSTI]

    -printed cells by 0.2% [6,7]. The electrical and optical losses of the full- area Al-BSF at the rear side can19.4% -EFFICIENT LARGE AREA REAR-PASSIVATED SCREEN-PRINTED SILICON SOLAR CELLS T. Dullweber*1 , S implemented a baseline solar cell process based on today's standard industrially manufactured silicon solar

  20. 4 Axis Implementation of the Active Feedback Mirror System for the IR Beamline 1.4.3

    E-Print Network [OSTI]

    ., Livermore, CA 94550-9234 INTRODUCTION After extensive passive noise re-mediation Beamline 1.4.3 still had implemented on Beamline 1.4. Inset shows photograph of spool piece housing the first beamsplitter, PSD #1 is that we have reduced the noise by both passive and

  1. Load attenuating passively adaptive wind turbine blade

    DOE Patents [OSTI]

    Veers, Paul S.; Lobitz, Donald W.

    2003-01-07

    A method and apparatus for improving wind turbine performance by alleviating loads and controlling the rotor. The invention employs the use of a passively adaptive blade that senses the wind velocity or rotational speed, and accordingly modifies its aerodynamic configuration. The invention exploits the load mitigation prospects of a blade that twists toward feather as it bends. The invention includes passively adaptive wind turbine rotors or blades with currently preferred power control features. The apparatus is a composite fiber horizontal axis wind-turbine blade, in which a substantial majority of fibers in the blade skin are inclined at angles of between 15 and 30 degrees to the axis of the blade, to produces passive adaptive aeroelastic tailoring (bend-twist coupling) to alleviate loading without unduly jeopardizing performance.

  2. Load attenuating passively adaptive wind turbine blade

    DOE Patents [OSTI]

    Veers, Paul S. (Albuquerque, NM); Lobitz, Donald W. (Albuquerque, NM)

    2003-01-01

    A method and apparatus for improving wind turbine performance by alleviating loads and controlling the rotor. The invention employs the use of a passively adaptive blade that senses the wind velocity or rotational speed, and accordingly modifies its aerodynamic configuration. The invention exploits the load mitigation prospects of a blade that twists toward feather as it bends. The invention includes passively adaptive wind turbine rotors or blades with currently preferred power control features. The apparatus is a composite fiber horizontal axis wind-turbine blade, in which a substantial majority of fibers in the blade skin are inclined at angles of between 15 and 30 degrees to the axis of the blade, to produces passive adaptive aeroelastic tailoring (bend-twist coupling) to alleviate loading without unduly jeopardizing performance.

  3. Passive infrared bullet detection and tracking

    DOE Patents [OSTI]

    Karr, Thomas J. (Alamo, CA)

    1997-01-01

    An apparatus and method for passively detecting a projectile such as, for example, a bullet using a passive infrared detector. A passive infrared detector is focused onto a region in which a projectile is expected to be located. Successive images of infrared radiation in the region are recorded. Background infrared radiation present in the region is suppressed such that second successive images of infrared radiation generated by the projectile as the projectile passes through the region are produced. A projectile path calculator determines the path and other aspects of the projectile by using the second successive images of infrared radiation generated by the projectile. The present invention, in certain embodiments, also determines the origin of the path of the projectile and takes a photograph of the area surrounding the origin and/or fires at least one projectile at the area surrounding the origin of the path of the projectile.

  4. Passive cooling system for a vehicle

    DOE Patents [OSTI]

    Hendricks, Terry Joseph; Thoensen, Thomas

    2005-11-15

    A passive cooling system for a vehicle (114) transfers heat from an overheated internal component, for example, an instrument panel (100), to an external portion (116) of the vehicle (114), for example, a side body panel (126). The passive cooling system includes one or more heat pipes (112) having an evaporator section (118) embedded in the overheated internal component and a condenser section (120) at the external portion (116) of the vehicle (114). The evaporator (118) and condenser (120) sections are in fluid communication. The passive cooling system may also include a thermally conductive film (140) for thermally connecting the evaporator sections (118) of the heat pipes (112) to each other and to the instrument panel (100).

  5. Passive Cooling System for a Vehicle

    DOE Patents [OSTI]

    Hendricks, T. J.; Thoensen, T.

    2005-11-15

    A passive cooling system for a vehicle (114) transfers heat from an overheated internal component, for example, an instrument panel (100), to an external portion (116) of the vehicle (114), for example, a side body panel (126). The passive cooling system includes one or more heat pipes (112) having an evaporator section (118) embedded in the overheated internal component and a condenser section (120) at the external portion (116) of the vehicle (114). The evaporator (118) and condenser (120) sections are in fluid communication. The passive cooling system may also include a thermally conductive film (140) for thermally connecting the evaporator sections (118) of the heat pipes (112) to each other and to the instrument panel (100).

  6. Passive absolute age and temperature history sensor

    SciTech Connect (OSTI)

    Robinson, Alex; Vianco, Paul T.

    2015-11-10

    A passive sensor for historic age and temperature sensing, including a first member formed of a first material, the first material being either a metal or a semiconductor material and a second member formed of a second material, the second material being either a metal or a semiconductor material. A surface of the second member is in contact with a surface of the first member such that, over time, the second material of the second member diffuses into the first material of the first member. The rate of diffusion for the second material to diffuse into the first material depends on a temperature of the passive sensor. One of the electrical conductance, the electrical capacitance, the electrical inductance, the optical transmission, the optical reflectance, or the crystalline structure of the passive sensor depends on the amount of the second material that has diffused into the first member.

  7. Site specific passive acoustic detection and densities of humpback whale calls off the coast of California /

    E-Print Network [OSTI]

    Helble, Tyler Adam

    2013-01-01

    61 3.2 Passive acoustic recording of transiting humpback100 Chapter 4 Calibrating passive acoustic monitoring: whaledensity estimates from passive acoustics . . . . . . .

  8. Active, but not passive cigarette smoking was inversely associated with mammographic density

    E-Print Network [OSTI]

    2010-01-01

    ORIGINAL PAPER Active, but not passive cigarette smoking wasAccumulating evidence on passive and active smoking andA (2002) Smoking (active and passive) and breast cancer:

  9. Passive stiffness of hindlimb muscles in anurans with distinct locomotor specializations

    E-Print Network [OSTI]

    Danos, N; Azizi, E

    2015-01-01

    as: Danos, N. , Azizi, E. , Passive stiffness of hindlimbEffects of stretching on passive muscle tension and responseLocomotor function shapes the passive mechanical properties

  10. Large scale passive force-displacement and dynamic earth pressure experiments and simulations

    E-Print Network [OSTI]

    Wilson, Patrick Richard

    2009-01-01

    for the calculation of passive pressure, active pressure andand Rollins, K. (2006). Passive earth pressure mobilizationand Mokwa, R. (2001). Passive earth pressures: theories and

  11. Measurements of Passive Correction of Magnetization Higher Multipoles in One Meter Long Dipoles

    E-Print Network [OSTI]

    Green, M.A.

    2011-01-01

    H. E. Fisk, the idea of passive presented at the Snowmasset al. , IEEE Fermilab Passive Transactions on MagneticsOO1812 MEASUREMENTS OF PASSIVE CORRECTION OF MAGNETIZATION

  12. Passive Superconductor: A Viable Method of Controlling Magnetization Multipoles in the SSC Dipole

    E-Print Network [OSTI]

    Green, M.A.

    2011-01-01

    superconductor is required for passive correction than wouldcoils. ) The case of passive superconductor to correct thecommunication on the use of a passive superconductor to

  13. Correction of Magnetization Sextupole and Decapole in a 5 Centimeter Bore SSC Dipole Using Passive Superconductor

    E-Print Network [OSTI]

    Green, M.A.

    2011-01-01

    The Idea of Passive Superconductor Correction," presented aton the Fermilab Passive Superconductor Test," ICFA Workshop,methods of passive superconductor correction will reduce

  14. A CLASSIFICATION SCHEME FOR THE COMMON PASSIVE AND HYBRID HEATING AND COOLING SYSTEMS

    E-Print Network [OSTI]

    Holtz, Michael J.

    2011-01-01

    INTRODUCTION A passive building design attempts, within eco-and features of the building, the passive system componentsenergy. Passive cooling also uses elements of the building

  15. JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, What is the skill of ocean tracers in reducing uncertainties

    E-Print Network [OSTI]

    Haran, Murali

    in current Earth system models and (ii) imperfect knowledge of model parameters. Ocean tracers observa- tions

  16. Relational Agents: A Model and Implementation of Building User Trust

    E-Print Network [OSTI]

    Bickmore, Timothy

    ; essentially a passive strategy for relationship building. What these systems lack are explicit behaviorsRelational Agents: A Model and Implementation of Building User Trust Timothy Bickmore, Justine}@media.mit.edu ABSTRACT Building trust with users is crucial in a wide range of applications, such as advice

  17. 1. Abstract This paper describes the architecture and implementation of

    E-Print Network [OSTI]

    Jahanian, Farnam

    1. Abstract This paper describes the architecture and implementation of Windmill, a passive network protocol performance measurement tool. Windmill enables experimenters to measure a broad range of protocol protocol layers' events. Windmill is split into three functional components: a dynamically compiled

  18. Heterojunction solar cell with passivated emitter surface

    DOE Patents [OSTI]

    Olson, Jerry M. (Lakewood, CO); Kurtz, Sarah R. (Golden, CO)

    1994-01-01

    A high-efficiency heterojunction solar cell wherein a thin emitter layer (preferably Ga.sub.0.52 In.sub.0.48 P) forms a heterojunction with a GaAs absorber layer. A passivating window layer of defined composition is disposed over the emitter layer. The conversion efficiency of the solar cell is at least 25.7%. The solar cell preferably includes a passivating layer between the substrate and the absorber layer. An anti-reflection coating is preferably disposed over the window layer.

  19. Heterojunction solar cell with passivated emitter surface

    DOE Patents [OSTI]

    Olson, J.M.; Kurtz, S.R.

    1994-05-31

    A high-efficiency heterojunction solar cell is described wherein a thin emitter layer (preferably Ga[sub 0.52]In[sub 0.48]P) forms a heterojunction with a GaAs absorber layer. A passivating window layer of defined composition is disposed over the emitter layer. The conversion efficiency of the solar cell is at least 25.7%. The solar cell preferably includes a passivating layer between the substrate and the absorber layer. An anti-reflection coating is preferably disposed over the window layer. 1 fig.

  20. Passive solar design handbook. Volume two of two volumes: passive solar design analysis

    SciTech Connect (OSTI)

    Balcomb, J.D.; Barley, D.; McFarland, R.; Perry, J. Jr.; Wray, W.; Noll, S.

    1980-01-01

    A manual for the design and performance evaluation and analysis of passive solar heating systems is presented. Two passive solar building types are analyzed: direct gain and thermal storage walls. Rules of thumb for the schematic design phase and simplified procedures for the design development phase are described. Analysis methods for the construction documents phase are given. The design procedure for fan-forced rock beds for hybrid systems is presented. Economic analysis methods for passive solar buildings are described. Tables of monthly average solar radiation, temperature, and degree-days for various locations in the US and southern Canada are included. (WHK)

  1. Development of Models to Simulate Tracer Tests for Characterization of Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Williams, Mark D.; Reimus, Paul; Vermeul, Vincent R.; Rose, Peter; Dean, Cynthia A.; Watson, Tom B.; Newell, D.; Leecaster, Kevin; Brauser, Eric

    2013-05-01

    A recent report found that power and heat produced from enhanced (or engineered) geothermal systems (EGSs) could have a major impact on the U.S energy production capability while having a minimal impact on the environment. EGS resources differ from high-grade hydrothermal resources in that they lack sufficient temperature distribution, permeability/porosity, fluid saturation, or recharge of reservoir fluids. Therefore, quantitative characterization of temperature distributions and the surface area available for heat transfer in EGS is necessary for the design and commercial development of the geothermal energy of a potential EGS site. The goal of this project is to provide integrated tracer and tracer interpretation tools to facilitate this characterization. This project was initially focused on tracer development with the application of perfluorinated tracer (PFT) compounds, non-reactive tracers used in numerous applications from atmospheric transport to underground leak detection, to geothermal systems, and evaluation of encapsulated PFTs that would release tracers at targeted reservoir temperatures. After the 2011 midyear review and subsequent discussions with the U.S. Department of Energy Geothermal Technology Program (GTP), emphasis was shifted to interpretive tool development, testing, and validation. Subsurface modeling capabilities are an important component of this project for both the design of suitable tracers and the interpretation of data from in situ tracer tests, be they single- or multi-well tests. The purpose of this report is to describe the results of the tracer and model development for simulating and conducting tracer tests for characterizing EGS parameters.

  2. Passive background correction method for spatially resolved detection

    DOE Patents [OSTI]

    Schmitt, Randal L. (Tijeras, NM); Hargis, Jr., Philip J. (Albuquerque, NM)

    2011-05-10

    A method for passive background correction during spatially or angularly resolved detection of emission that is based on the simultaneous acquisition of both the passive background spectrum and the spectrum of the target of interest.

  3. Passive Ammonia SCR for Lean Burn SIDI Engines | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Ammonia SCR for Lean Burn SIDI Engines Passive Ammonia SCR for Lean Burn SIDI Engines Passive NH3 SCR has been demonstrated as a high efficiency and low cost alternative lean NOx...

  4. Integration of a "Passive Water Recovery" MEA into a Portable...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Integration of a "Passive Water Recovery" MEA into a Portable DMFC Power Supply Integration of a "Passive Water Recovery" MEA into a Portable DMFC Power Supply Download slides from...

  5. Passive Reduced Order Modeling of Multiport Interconnects via Semidefinite Programming

    E-Print Network [OSTI]

    Mahmood, Zohaib

    In this paper we present a passive reduced order modeling algorithm for linear multiport interconnect structures. The proposed technique uses rational fitting via semidefinite programming to identify a passive transfer ...

  6. Active and passive coping strategies in chronic pain patients

    E-Print Network [OSTI]

    Snow-Turek, Andrea Lynn

    1994-01-01

    This study assessed the validity of an active/passive conceptualization of coping in a sample of chronic pain patients (N = 84). The validity of active and passive coping dimensions was supported. The Coping Strategies ...

  7. Prediction techniques for passive systems' probability of failure

    E-Print Network [OSTI]

    Cavalieri d'Oro, Edoardo

    2007-01-01

    This work fits into the wider framework of the on-going debate centered on Passive System reliability. Its aim is to provide insights into the design of a dependable method to evaluate the reliability of Passive Systems. ...

  8. Defeating Passive Eavesdropping with Quantum Illumination

    E-Print Network [OSTI]

    Jeffrey H. Shapiro

    2009-04-28

    Quantum illumination permits Alice and Bob to communicate at 50 Mbit/s over 50 km of low-loss fiber with error probability less than 10^(-6) while the optimum passive eavesdropper's error probability must exceed 0.28.

  9. Passive safety injection system using borated water

    DOE Patents [OSTI]

    Conway, Lawrence E. (Allegheny, PA); Schulz, Terry L. (Westmoreland, PA)

    1993-01-01

    A passive safety injection system relies on differences in water density to induce natural circulatory flow patterns which help maintain prescribed concentrations of boric acid in borated water, and prevents boron from accumulating in the reactor vessel and possibly preventing heat transfer.

  10. Photodetectors with passive thermal radiation control

    DOE Patents [OSTI]

    Lin, Shawn-Yu (Albuquerque, NM); Fleming, James G. (Albuquerque, NM); Dodson, Brian W. (Albuquerque, NM)

    2001-10-02

    A new class of photodetectors which include means for passive shielding against undesired thermal radiation is disclosed. Such devices can substitute in applications currently requiring cooled optical sensors, such as IR detection and imaging. This description is included for purposes of searching, and is not intended to limit or otherwise influence the interpretation of the present invention.

  11. Design tools for passive solar applications

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1986-04-01

    Examples of passive solar design tools are given, categorized as either evaluation tools or guidance tools. A trend toward microcomputer-based tools is noted; however, these are usually developed for use by engineers rather than architects. The need for more instructive tools targeted specifically to designers is emphasized.

  12. Submerged passively-safe power plant

    SciTech Connect (OSTI)

    Herring, J.S.

    1991-12-31

    The invention as presented consists of a submerged passively-safe power station including a pressurized water reactor capable of generating at least 600 MW of electricity, encased in a double hull vessel, and provides fresh water by using the spent thermal energy in a multistage flash desalination process.

  13. Plasticity in Passive Cell Mechanics D. Ambrosia

    E-Print Network [OSTI]

    Ambrosi, Davide

    Plasticity in Passive Cell Mechanics D. Ambrosia , P. Ciarlettab,c a MOX-Dipartimento di Matematica'Alembert, UMR 7190, Universite Pierre et Marie Curie - Paris 6 4 place Jusseu, Case 162, 75005 Paris, France c mechanics, plastic hardening 2000 MSC: 74C20, 92C05 1. Introduction The mechanical characterization

  14. Demonstrating Passivity and Dissipativity using Computational Methods

    E-Print Network [OSTI]

    Antsaklis, Panos

    is captured by an energy storage function. The rate energy is supplied by the environment can be specified by an energy supply rate. This supply rate can be chosen to capture system properties including passivity and L a particular energy supply rate, and then finding an energy storage function. Finding an energy storage

  15. Submerged passively-safe power plant

    DOE Patents [OSTI]

    Herring, J.S.

    1993-09-21

    The invention as presented consists of a submerged passively-safe power station including a pressurized water reactor capable of generating at least 600 MW of electricity, encased in a double hull vessel, and provides fresh water by using the spent thermal energy in a multistage flash desalination process. 8 figures.

  16. Submerged passively-safe power plant

    DOE Patents [OSTI]

    Herring, J. Stephen (Idaho Falls, ID)

    1993-01-01

    The invention as presented consists of a submerged passively-safe power station including a pressurized water reactor capable of generating at least 600 MW of electricity, encased in a double hull vessel, and provides fresh water by using the spent thermal energy in a multistage flash desalination process.

  17. New Whole-House Solutions Case Study: Hood River Passive House

    SciTech Connect (OSTI)

    2014-02-01

    The Hood River Passive Project was developed by Root Design Build of Hood River Oregon using the Passive House Planning Package (PHPP) to meet all of the requirements for certification under the European Passive House standards. The Passive House design approach has been gaining momentum among residential designers for custom homes and BEopt modeling indicates that these designs may actually exceed the goal of the U.S. Department of Energy's (DOE) Building America program to "reduce home energy use by 30%-50%" (compared to 2009 energy codes for new homes). This report documents the short term test results of the Shift House and compares the results of PHPP and BEopt modeling of the project. The design includes high R-Value assemblies, extremely tight construction, high performance doors and windows, solar thermal DHW, heat recovery ventilation, moveable external shutters and a high performance ductless mini-split heat pump. Cost analysis indicates that many of the measures implemented in this project did not meet the BA standard for cost neutrality. The ductless mini-split heat pump, lighting and advanced air leakage control were the most cost effective measures. The future challenge will be to value engineer the performance levels indicated here in modeling using production based practices at a significantly lower cost.

  18. Passive in Danish, English, and German Stefan Muller

    E-Print Network [OSTI]

    Passive in Danish, English, and German Stefan M¨uller Freie Universit¨at Berlin Bjarne ?rsnes Freie://csli-publications.stanford.edu/HPSG/2013 M¨uller, Stefan, & ?rsnes, Bjarne. (2013). Passive in Danish, English, and Ger- man. In Stefan M in the passive in Danish, English, and German can be accounted for. The three languages differ along

  19. GREAVES & FIGLIOZZI 1 COMMERCIAL VEHICLE TOUR DATA COLLECTION USING PASSIVE

    E-Print Network [OSTI]

    Bertini, Robert L.

    GREAVES & FIGLIOZZI 1 COMMERCIAL VEHICLE TOUR DATA COLLECTION USING PASSIVE GPS TECHNOLOGY: ISSUES information on commercial vehicle tours within an urban setting. The paper focuses on passive GPS methods of passive GPS technology in urban freight modelling and planning. Despite processing challenges, GPS

  20. PASSIVE BEHAVIOR BY THE SPOTTED DOLPHIN, STENELLA ATTENUATA, IN

    E-Print Network [OSTI]

    PASSIVE BEHAVIOR BY THE SPOTTED DOLPHIN, STENELLA ATTENUATA, IN TUNA PURSE SEINE NETS The purse and then recognized for its contribution to incidental mortality in 1975 is termed here "passive" behavior were recorded after each ofthe 25 net sets in which the rescue raft was used. The underwater passive

  1. Guaranteed Passive Balancing Transformations for Model Order Reduction

    E-Print Network [OSTI]

    Reif, Rafael

    Guaranteed Passive Balancing Transformations for Model Order Reduction Joel Phillips Cadence stable and efficient generation of the models, and preser- vation of system properties such as passivity. Algorithms such as PRIMA generate guaranteed-passive models, for systems with special internal structure

  2. Passive imaging and detection in cluttered media Josselin Garnier

    E-Print Network [OSTI]

    Garnier, Josselin

    Passive imaging and detection in cluttered media Josselin Garnier Laboratoire de Probabilit´es et passive sensor imaging with ambient noise sources by suitably migrating the cross correlations to subsequent eruptions. Cross correlations of noisy signals recorded by a passive sensor array can also

  3. Considering Passive Joints in Cooperative Manipulation as Functional Redundancy

    E-Print Network [OSTI]

    Gravdahl, Jan Tommy

    Considering Passive Joints in Cooperative Manipulation as Functional Redundancy Pal Johan From. Further, it is shown how this can be used to represent the freedom of passive joints. The main developed can be used to show how the introduction of passive joints at the end of a kinematic chain gives

  4. THEORY OF PASSIVE MAGNETIC FIELD TRANSPORT OF PETROVAY

    E-Print Network [OSTI]

    Petrovay, Kristf

    THEORY OF PASSIVE MAGNETIC FIELD TRANSPORT KRIST ' OF PETROVAY Eotvos University, Department by the kinematics of the turbulence (i.e. it is ``passive''), and it can be described by a onefluid model like mean to the dynamo layer must be thoroughly understood. This paper reviews the theory of passive magnetic field

  5. Dynamics of Passive Scalars and Probe Particles in Driven

    E-Print Network [OSTI]

    Dynamics of Passive Scalars and Probe Particles in Driven Diffusive Systems Sakuntala Chatterjee my parents #12;Contents Synopsis i 1 Introduction 1 1.1 Passive Scalar Advection . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 Probe Particles in a Driven Diffusive Medium . . . . . . . . . . . 9 2 Dynamics of Passive

  6. PASSIVE TIMESTAMPING IN THE BOUNDED STORAGE MODEL SUBMISSION VERSION

    E-Print Network [OSTI]

    Ta-Shma, Amnon

    PASSIVE TIMESTAMPING IN THE BOUNDED STORAGE MODEL SUBMISSION VERSION Abstract. A timestamping scheme is passive if a stamper can stamp a document without com­ municating with any other player. The only communication done is at validation time. Passive timestamping has many advantages

  7. Exploiting Passive Dynamics with Variable Stiffness Actuation in Robot Brachiation

    E-Print Network [OSTI]

    Vijayakumar, Sethu

    Exploiting Passive Dynamics with Variable Stiffness Actuation in Robot Brachiation Jun Nakanishi.nakanishi@ed.ac.uk, sethu.vijayakumar@ed.ac.uk Abstract--This paper explores a passive control strategy with variable present our passive control strategy considering a pendulum with variable stiffness actuation. Then, we

  8. Passive Decomposition of Multiple Mechanical Systems under Coordination Requirements

    E-Print Network [OSTI]

    Lee, Dongjun

    Passive Decomposition of Multiple Mechanical Systems under Coordination Requirements Dongjun Lee interacting with environments and/or humans under coordination requirements. The key innovation is the passive coordination and energetic passivity of the closed- loop system. It decomposes the system dynamics into shape

  9. A CLASSIFICATION SCHEME FOR THE COMMON PASSIVE AND HYBRID HEATING AND COOLING SYSTEMS

    E-Print Network [OSTI]

    Holtz, Michael J.

    2011-01-01

    Common Passive and Hybrid Heating Cooling Systems Michael].THE COMMON PASSIVE AND HYBRID HEATING AND COOLING SYSTEMS

  10. Final Progress Report for Project Entitled: Quantum Dot Tracers for Use in Engineered Geothermal Systems

    SciTech Connect (OSTI)

    Rose, Peter; Bartl, Michael; Reimus, Paul; Williams, Mark; Mella, Mike

    2015-09-12

    The objective of this project was to develop and demonstrate a new class of tracers that offer great promise for use in characterizing fracture networks in EGS reservoirs. From laboratory synthesis and testing through numerical modeling and field demonstrations, we have demonstrated the amazing versatility and applicability of quantum dot tracers. This report summarizes the results of four years of research into the design, synthesis, and characterization of semiconductor nanocrystals (quantum dots) for use as geothermal tracers.

  11. Final report on isotope tracer investigations in the Forebay of the Orange County groundwater basin.

    SciTech Connect (OSTI)

    Davisson, M; Woodside, G

    2003-12-13

    California is currently faced with some critical decisions about water resource infrastructure development in highly urbanized regions, whose outcome will dictate the future long-term viability of plentiful water. Among these is developing and safely implementing the reuse of advanced treated waste water. One of the most reliable strategies for this water resource is its indirect reuse via groundwater recharge and storage, with particular emphasis on supplementing annual water demand or during drought relief. The Orange County Water District (District) is currently implementing the first phase of a large-scale water reuse project that will advance-treat up to 60 million gallons per day of waste water and recharge it into existing percolation basins in the Forebay region of the Orange County groundwater basin. In order for the District to protect public health, the fate and potability of this recharged waste water needs to be understood. In particular, the direction and rates of flow into underlying aquifers need to be characterized so that changes in water quality can be quantified between the recharge basins and points of production. Furthermore, to ensure compliance to California Department of Health Services (DHS) draft regulations, the direction and rate of recharged waste water from these basins need to be understood to sufficient detail that small mixtures can be delineated in monitoring and production wells. Under proposed DHS guidelines, consumptive use of recycled water is permissive only if its residence time in an aquifer exceeds a specified six-month time-frame. DHS guidelines also limit the percentage of recycled water at production wells. However, attaining such detail using current hydrogeological and computer-assisted modeling tools is either cost-prohibitive or results in uncertainties too large to achieve regulatory confidence. To overcome this technical barrier, the District funded Lawrence Livermore National Laboratory (LLNL) from 1995-2001 to directly measure groundwater ages and perform two artificial tracer studies using isotope methods to quantify flowpath directions, groundwater residence times, and the rate and extent of recharge water and groundwater mixing. In addition, Jordan Clark at University of California, Santa Barbara also performed an artificial tracer experiment using sulfur-hexafluoride, whose results have been integrated into the LLNL findings.

  12. Novel Multi-dimensional Tracers for Geothermal Inter-wall Diagnostics

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. The objective of this project is to develop a matrix of the smart geothermal tracer and its interpretation tools.

  13. Development of Atmospheric Tracer Methods To Measure Methane Emissions from Natural Gas Facilities and Urban Areas

    E-Print Network [OSTI]

    1995-01-01

    an urban area is used with crosswind integrated tracerCWI,) and the average crosswind concen- tration of methane (directly, and the crosswind average methane concentration

  14. Passive decoy state quantum key distribution with practical light sources

    E-Print Network [OSTI]

    Marcos Curty; Xiongfeng Ma; Bing Qi; Tobias Moroder

    2009-11-14

    Decoy states have been proven to be a very useful method for significantly enhancing the performance of quantum key distribution systems with practical light sources. While active modulation of the intensity of the laser pulses is an effective way of preparing decoy states in principle, in practice passive preparation might be desirable in some scenarios. Typical passive schemes involve parametric down-conversion. More recently, it has been shown that phase randomized weak coherent pulses (WCP) can also be used for the same purpose [M. Curty {\\it et al.}, Opt. Lett. {\\bf 34}, 3238 (2009).] This proposal requires only linear optics together with a simple threshold photon detector, which shows the practical feasibility of the method. Most importantly, the resulting secret key rate is comparable to the one delivered by an active decoy state setup with an infinite number of decoy settings. In this paper we extend these results, now showing specifically the analysis for other practical scenarios with different light sources and photo-detectors. In particular, we consider sources emitting thermal states, phase randomized WCP, and strong coherent light in combination with several types of photo-detectors, like, for instance, threshold photon detectors, photon number resolving detectors, and classical photo-detectors. Our analysis includes as well the effect that detection inefficiencies and noise in the form of dark counts shown by current threshold detectors might have on the final secret ket rate. Moreover, we provide estimations on the effects that statistical fluctuations due to a finite data size can have in practical implementations.

  15. Evaluation of Alternate Stainless Steel Surface Passivation Methods

    SciTech Connect (OSTI)

    Clark, Elliot A.

    2005-05-31

    Stainless steel containers were assembled from parts passivated by four commercial vendors using three passivation methods. The performance of these containers in storing hydrogen isotope mixtures was evaluated by monitoring the composition of initially 50% H{sub 2} 50% D{sub 2} gas with time using mass spectroscopy. Commercial passivation by electropolishing appears to result in surfaces that do not catalyze hydrogen isotope exchange. This method of surface passivation shows promise for tritium service, and should be studied further and considered for use. On the other hand, nitric acid passivation and citric acid passivation may not result in surfaces that do not catalyze the isotope exchange reaction H{sub 2} + D{sub 2} {yields} 2HD. These methods should not be considered to replace the proprietary passivation processes of the two current vendors used at the Savannah River Site Tritium Facility.

  16. Passive heat transfer means for nuclear reactors

    DOE Patents [OSTI]

    Burelbach, James P. (Glen Ellyn, IL)

    1984-01-01

    An improved passive cooling arrangement is disclosed for maintaining adjacent or related components of a nuclear reactor within specified temperature differences. Specifically, heat pipes are operatively interposed between the components, with the vaporizing section of the heat pipe proximate the hot component operable to cool it and the primary condensing section of the heat pipe proximate the other and cooler component operable to heat it. Each heat pipe further has a secondary condensing section that is located outwardly beyond the reactor confinement and in a secondary heat sink, such as air ambient the containment, that is cooler than the other reactor component. Means such as shrouding normally isolated the secondary condensing section from effective heat transfer with the heat sink, but a sensor responds to overheat conditions of the reactor to open the shrouding, which thereby increases the cooling capacity of the heat pipe. By having many such heat pipes, an emergency passive cooling system is defined that is operative without electrical power.

  17. Passively damped vibration welding system and method

    DOE Patents [OSTI]

    Tan, Chin-An; Kang, Bongsu; Cai, Wayne W.; Wu, Tao

    2013-04-02

    A vibration welding system includes a controller, welding horn, an anvil, and a passive damping mechanism (PDM). The controller generates an input signal having a calibrated frequency. The horn vibrates in a desirable first direction at the calibrated frequency in response to the input signal to form a weld in a work piece. The PDM is positioned with respect to the system, and substantially damps or attenuates vibration in an undesirable second direction. A method includes connecting the PDM having calibrated properties and a natural frequency to an anvil of an ultrasonic welding system. Then, an input signal is generated using a weld controller. The method includes vibrating a welding horn in a desirable direction in response to the input signal, and passively damping vibration in an undesirable direction using the PDM.

  18. Germanium detector passivated with hydrogenated amorphous germanium

    DOE Patents [OSTI]

    Hansen, William L. (Walnut Creek, CA); Haller, Eugene E. (Berkeley, CA)

    1986-01-01

    Passivation of predominantly crystalline semiconductor devices (12) is provided for by a surface coating (21) of sputtered hydrogenated amorphous semiconductor material. Passivation of a radiation detector germanium diode, for example, is realized by sputtering a coating (21) of amorphous germanium onto the etched and quenched diode surface (11) in a low pressure atmosphere of hydrogen and argon. Unlike prior germanium diode semiconductor devices (12), which must be maintained in vacuum at cryogenic temperatures to avoid deterioration, a diode processed in the described manner may be stored in air at room temperature or otherwise exposed to a variety of environmental conditions. The coating (21) compensates for pre-existing undesirable surface states as well as protecting the semiconductor device (12) against future impregnation with impurities.

  19. Inversion of Hydrological Tracer Test Data Using TomogrpahicConstraints

    SciTech Connect (OSTI)

    Linde, Niklas; Finsterle, Stefan; Hubbard, Susan

    2004-11-11

    A reasonable description of the hydraulic conductivity structure is a prerequisite for modeling contaminant transport. However, formulations of hydrogeological inverse problems utilizing hydrogeological data only often fail to reliably resolve features at a resolution required for accurately predicting transport. Incorporation of geophysical data into the inverse problem offers the potential to increase this resolution. In this study, we invert hydrological tracer test data using the shape and relative magnitude variations derived from geophysical tomographic data to regionalize a hydrogeological inverse problem in order to estimate the hydraulic conductivity structure. Our approach does not require that the petrophysical relationship be known a-priori, but that it is linear and stationary within each geophysical anomaly. However, tomograms are imperfect models of geophysical properties and geophysical properties are not necessarily strongly linked to hydraulic conductivity. Therefore, we focus on synthetic examples where the correlation between radar velocity and hydraulic conductivity, as well as the geophysical data acquisition errors, are varied in order to assess what aspects of the hydraulic conductivity structure we can expect to resolve under different conditions. The results indicate that regularization of the tracer inversion procedure using geophysical data improves estimates of hydraulic conductivity. We find that even under conditions of corrupted geophysical data, we can accurately estimate the effective hydraulic conductivity and areas of high and low hydraulic conductivity. However, given imperfect geophysical data, our results suggest that we cannot expect accurate estimates of the variability of the hydraulic conductivity structure.

  20. Passively cooled direct drive wind turbine

    DOE Patents [OSTI]

    Costin, Daniel P. (Chelsea, VT)

    2008-03-18

    A wind turbine is provided that passively cools an electrical generator. The wind turbine includes a plurality of fins arranged peripherally around a generator house. Each of the fins being oriented at an angle greater than zero degrees to allow parallel flow of air over the fin. The fin is further tapered to allow a constant portion of the fin to extend beyond the air stream boundary layer. Turbulence initiators on the nose cone further enhance heat transfer at the fins.

  1. Passivation layer on polyimide deposited by combined plasma immersion ion implantation and deposition and cathodic vacuum arc technique

    SciTech Connect (OSTI)

    Han, Z. J.; Tay, B. K.; Sze, J. Y.; Ha, P. C. T.

    2007-05-15

    A thin passivation layer of aluminum oxide was deposited on polyimide by using the combined plasma immersion ion implantation and deposition (PIII and D) and cathodic vacuum arc technique. X-ray photoelectron spectroscopy C 1s spectra showed that the carbonyl bond (C=O) and ether group (C-O-C and C-N-C) presented in pristine polyimide were damaged by implantation of aluminum ions and deposition of an aluminum oxide passivation layer. O 1s and Al 2p spectra confirmed the formation of a thin aluminum oxide passivation layer. This passivation layer can be implemented in aerospace engineering where polyimide may suffer degradation from fast atomic oxygen in the low-earth-orbit environment. To test the protection of this passivation layer to energetic oxygen ions, a plasma-enhanced chemical vapor deposition system was used to simulate the oxygen-ion irradiation, and the results showed that a higher weight occurred for passivated samples compared to pristine ones. X-ray diffraction showed that Al peaks were presented on the surface region, but no aluminum oxide peak was detected. The authors then concluded that Al clusters were formed in polyimide besides aluminum oxide, which was in an x-ray amorphous state. Furthermore, contact-angle measurements showed a reduced contact angle for passivated polyimide from a pristine value of 78 deg. to 20 deg. by using deionized water. Several discussions have been made on the surface chemical and structural property changes by using the combined PIII and D and cathodic vacuum arc technique.

  2. SENSITIVITY OF A REACTIVE-TRACER BASED ESTIMATE OF THERMAL BREAKTHROUGH IN AN EGS TO PROPERTIES OF THE RESERVOIR AND TRACER

    SciTech Connect (OSTI)

    Mitchell A. Plummer; Carl D. Palmer; Laurence C. Hull; Earl D. Mattson

    2010-02-01

    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 reservoir cooling and demonstrate that while the sensitivity of the method as generally proposed is low, it may be practical under certain conditions. Our analyses suggest that modifications to that method, where practical, could provide much greater sensitivity. In particular, if the reaction can be quenched before maximum temperature is reached, the sensitivity is greatly enhanced. Push-pull tracer tests conducted at the injection well demonstrate similar advantages. Other alternatives, such as combinations of tracers, and tracers with parallel or chain decay behavior may offer similar advantages.

  3. First Tracer Test After Circulation in Desert Peak 27-15

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Rose, Peter

    2013-11-16

    Following the successful stimulation of Desert Peak target EGS well 27-15, a circulation test was initiated by injecting a conservative tracer (1,5-nds) in combination with a reactive tracer (7-amino-1,3-naphthalene disulfonate). The closest production well 74-21 was monitored over the subsequent several months.

  4. Tracer Methods for Characterizing Fracture Stimulation in Engineered Geothermal Systems (EGS)

    Broader source: Energy.gov [DOE]

    Project objectives: identify tracers with sorption properties favorable for EGS applications; apply reversibly sorbing tracers to determine the fracture-matrix interface area available for heat transfer; and; explore the feasibility of obtaining fracture-matrix interface area from non-isothermal; single-well injection-withdrawal (SWIW) tests.

  5. First Tracer Test After Circulation in Desert Peak 27-15

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Rose, Peter

    Following the successful stimulation of Desert Peak target EGS well 27-15, a circulation test was initiated by injecting a conservative tracer (1,5-nds) in combination with a reactive tracer (7-amino-1,3-naphthalene disulfonate). The closest production well 74-21 was monitored over the subsequent several months.

  6. SYNTHESIS OF DIVERSE TRACERS ON EWOD MICRODEVICE FOR POSITRON EMISSION TOMOGRAPHY (PET)

    E-Print Network [OSTI]

    , spatial, and temporal measurement of biochemical processes. Applications of PET include studying disease-labeled PET tracers with electrowetting-on-dielectric (EWOD) technology [3],[4], the digital microfluidicSYNTHESIS OF DIVERSE TRACERS ON EWOD MICRODEVICE FOR POSITRON EMISSION TOMOGRAPHY (PET) S. Chen1

  7. Heat, 10B-Enriched Boric Acid, and Bromide as Recycled Groundwater Tracers for Managed Aquifer Recharge: Case Study

    E-Print Network [OSTI]

    Clark, J F

    2015-01-01

    water tracer. Ground Water, Bassett, R. L. (1990). Atemperature sensing. Ground Water, 51(5), 670678. Becker,acid as recycled ground- water tracers for managed aquifer

  8. Passive scalar transport in peripheral regions of random flows

    E-Print Network [OSTI]

    A. Chernykh; V. Lebedev

    2011-03-17

    We investigate statistical properties of the passive scalar near boundaries (walls) in random (turbulent) flows assuming weakness of its diffusion. Then at advanced stages of the passive scalar mixing its unmixed residue is concentrated in a narrow diffusive layer near the wall and its transport to bulk goes through the peripheral region (laminar sublayer). We conducted Lagrangian numerical simulations of the process for different space dimensions $d$ and revealed structures responsible for the transport that are passive scalar tongues pulled from the diffusive boundary layer to bulk. We investigated statistical properties of the passive scalar and of the passive scalar integrated along the wall. Moments of both objects demonstrate scaling behavior outside the diffusive boundary layer. We propose an analytical scheme for explanation scaling of the passive scalar, the obtained exponents agree reasonably with numerics in 3d.

  9. Innovative techniques for the description of reservoir heterogeneity using tracers. Second technical annual progress report, October 1991--September 1992

    SciTech Connect (OSTI)

    Pope, G.A.; Sepehrnoori, K.

    1992-12-31

    This second annual report on innovative uses of tracers for reservoir characterization contains four sections each describing a novel use of oilfield tracers. The first section describes and illustrates the use of a new single-well tracer test to estimate wettability. This test consists of the injection of brine containing tracers followed by oil containing tracers, a shut-in period to allow some of the tracers to react, and then production of the tracers. The inclusion of the oil injection slug with tracers is unique to this test, and this is what makes the test work. We adapted our chemical simulator, UTCHEM, to enable us to study this tracer method and made an extensive simulation study to evaluate the effects of wettability based upon characteristic curves for relative permeability and capillary pressure for differing wetting states typical of oil reservoirs. The second section of this report describes a new method for analyzing interwell tracer data based upon a type-curve approach. Theoretical frequency response functions were used to build type curves of ``transfer function`` and ``phase spectrum`` that have dimensionless heterogeneity index as a parameter to characterize a stochastic permeability field. We illustrate this method by analyzing field tracer data. The third section of this report describes a new theory for interpreting interwell tracer data in terms of channeling and dispersive behavior for reservoirs. Once again, a stochastic approach to reservoir description is taken. The fourth section of this report describes our simulation of perfluorocarbon gas tracers. This new tracer technology developed at Brookhaven National Laboratory is being tested at the Elk Hills Naval Petroleum Reserve No. 1 in California. We report preliminary simulations made of these tracers in one of the oil reservoirs under evaluation with these tracers in this field. Our compostional simulator (UTCOMP) was used for this simulation study.

  10. Passives and Verb Agreement in Kiowa-Tanoan

    E-Print Network [OSTI]

    Watkins, Laurel J.

    1982-01-01

    PASSIVES AND VERBAGREEMEN~IN KIOWA-TANOAN l Laurel J. Watkins Colorado College 1. Passive constructions have been reported in three of the four subgroups of Kiowa-Tanoan: Tewa (Arizona Tewa only, Kroskrity 1979), Towa (Jemez, Hale 1972), and Tiwa... (Isleta, Allen and Frantz 1978, Allen and Gardiner 1981; Picuris, Zaharlick 1980). These analyses are typic ally based on three diagnostic features: 1) intransitive or special passive verb agreement prefixes, 2) morphologically marked agent nomi nals...

  11. Passive containment cooling water distribution device

    DOE Patents [OSTI]

    Conway, Lawrence E. (Hookstown, PA); Fanto, Susan V. (Plum Borough, PA)

    1994-01-01

    A passive containment cooling system for a nuclear reactor containment vessel. Disclosed is a cooling water distribution system for introducing cooling water by gravity uniformly over the outer surface of a steel containment vessel using a series of radial guide elements and cascading weir boxes to collect and then distribute the cooling water into a series of distribution areas through a plurality of cascading weirs. The cooling water is then uniformly distributed over the curved surface by a plurality of weir notches in the face plate of the weir box.

  12. Passive solar concepts for multistory buildings

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1982-01-01

    Multistory buildings long in the east-west direction and short in the north-south direction offer good opportunity for passive solar application. If each unit within the building is designed so that the Solar Savings Fraction is the same, each will respond to the weather the same way and no unit-to-unit heat distribution is needed. A numerical example for Denver is given indicating excellent thermal performance and a several-day thermal response time. Solutions involving distribution of heat from unit to unit are also discussed as well as top-floor and south-wall variations.

  13. Passive solar concepts for multistory buildings

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1982-01-01

    Multistory buildings long in the east-west direction and short in the north-south direction offer good opportunity for passive solar application. If each unit within the building is designed so that the solar Savings Fraction is the same, each will respond to the weather the same way and no unit-to-unit heat distribution is needed. A numerical example for Denver is given indicating excellent thermal performance and a several-day thermal response time. Solutions involving distribution of heat from unit to unit are also discussed as well as top-floor and south-wall variations.

  14. Passivation-free solid state battery

    DOE Patents [OSTI]

    Abraham, Kuzhikalail M. (Needham, MA); Peramunage, Dharmasena (Norwood, MA)

    1998-01-01

    This invention pertains to passivation-free solid-state rechargeable batteries composed of Li.sub.4 Ti.sub.5 O.sub.12 anode, a solid polymer electrolyte and a high voltage cathode. The solid polymer electrolyte comprises a polymer host, such as polyacrylonitrile, poly(vinyl chloride), poly(vinyl sulfone), and poly(vinylidene fluoride), plasticized by a solution of a Li salt in an organic solvent. The high voltage cathode includes LiMn.sub.2 O.sub.4, LiCoO.sub.2, LiNiO.sub.2 and LiV.sub.2 O.sub.5 and their derivatives.

  15. Passive injection control for microfluidic systems

    DOE Patents [OSTI]

    Paul, Phillip H.; Arnold, Don W.; Neyer, David W.

    2004-12-21

    Apparatus for eliminating siphoning, "dead" regions, and fluid concentration gradients in microscale analytical devices. In its most basic embodiment, the present invention affords passive injection control for both electric field-driven and pressure-driven systems by providing additional fluid flow channels or auxiliary channels disposed on either side of a sample separation column. The auxiliary channels are sized such that volumetric fluid flow rate through these channels, while sufficient to move the sample away from the sample injection region in a timely fashion, is less than that through the sample separation channel or chromatograph.

  16. An SF6 Tracer Study of the Flow Dynamics in the Stockton Deep Water Ship Channel: Implications

    E-Print Network [OSTI]

    Ho, David

    An SF6 Tracer Study of the Flow Dynamics in the Stockton Deep Water Ship Channel: Implications6) tracer release experi- ment was conducted in the Stockton Deep Water Ship Channel (DWSC. Keywords Dissolved oxygen . SacramentoSan Joaquin delta . Stockton deep water ship channel . SF6 . Tracer

  17. FeCycle: Attempting an iron biogeochemical budget from a mesoscale SF6 tracer experiment in unperturbed low iron waters

    E-Print Network [OSTI]

    Wilhelm, Steven W.

    FeCycle: Attempting an iron biogeochemical budget from a mesoscale SF6 tracer experiment to ocean physics. In summer 2003 we conducted FeCycle, a 10-day mesoscale tracer release in HNLC waters SE biogeochemical budget from a mesoscale SF6 tracer experiment in unperturbed low iron waters, Global Biogeochem

  18. Passive Solar Building Design and Solar Thermal Space Heating Webinar

    Broader source: Energy.gov [DOE]

    Webinar of National Renewable Energy Laboratory (NREL) Senior Engineer Andy Walker's presentation about passive solar building design and solar thermal space heating technologies and applications.

  19. Development of a Thermoacoustic Model for Evaluating Passive Damping Strategies

    E-Print Network [OSTI]

    Rehman, Syed; Eldredge, Jeff D.

    2005-01-01

    The calculation of thermoacoustic oscillations. J. Sound008 "Development of a Thermoacoustic Model for EvaluatingDevelopment of a Thermoacoustic Model for Evaluating Passive

  20. Effects of passivation on synthesis, structure and composition...

    Office of Scientific and Technical Information (OSTI)

    on synthesis, structure and composition of molybdenum carbide supported platinum water-gas shift catalysts Citation Details In-Document Search Title: Effects of passivation...

  1. The Sandia MEMS Passive Shock Sensor : FY08 failure analysis...

    Office of Scientific and Technical Information (OSTI)

    analysis activities. Citation Details In-Document Search Title: The Sandia MEMS Passive Shock Sensor : FY08 failure analysis activities. No abstract prepared. Authors:...

  2. Passive Catalytic Approach to Low Temperature NOx Emission Abatement...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Catalytic Approach to Low Temperature NOx Emission Abatement Passive Catalytic Approach to Low Temperature NOx Emission Abatement Numerically evaluated and optimized proposed...

  3. Building America Whole-House Solutions for Existing Homes: Passive...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Building America Whole-House Solutions for Existing Homes: Passive Room-to-Room Air Transfer, Fresno, California (Fact Sheet) Building America Whole-House Solutions for Existing...

  4. Passive injection: A strategy for mitigating reservoir pressurization...

    Office of Scientific and Technical Information (OSTI)

    Passive injection: A strategy for mitigating reservoir pressurization, induced seismicity and brine migration in geologic CO2 storage Citation Details In-Document Search Title:...

  5. Passive Catalytic Approach to Low Temperature NOx Emission Abatement

    Broader source: Energy.gov [DOE]

    Numerically evaluated and optimized proposed state-of-the-art passive catalytic technology designed to reduce NOx released during vehicle cold start portion of the FTP-75 cycle

  6. Design and control of a passively stabilized multimodal hopping robot

    E-Print Network [OSTI]

    Pantel, Erica

    2010-01-01

    Stabilized Multimodal Hopping Robot A Thesis submitted inStabilized Multimodal Hopping Robot by Erica Pantel Masterfor a multimodal hopping robot. The robot harnesses passive

  7. Using Passive Solar Design to Save Money and Energy | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    thermal system (top of roof) supplies both domestic hot water and a secondary radiant floor heating system. | Photo courtesy of Jim Schmid Photography. Passive Solar Home...

  8. Building America Whole-House Solutions for Existing Homes: Passive...

    Energy Savers [EERE]

    clients to determine acceptable comfort levels for occupants in these cost-optimized, energy-efficient houses. Passive Room-to-Room Air Transfer - Fresno, California More...

  9. THE NEW YORK CITY URBAN DISPERSION PROGRAM MARCH 2005 FIELD STUDY: TRACER METHODS AND RESULTS.

    SciTech Connect (OSTI)

    WATSON, T.B.; HEISER, J.; KALB, P.; DIETZ, R.N.; WILKE, R.; WIESER, R.; VIGNATO, G.

    2005-10-01

    The Urban Dispersion Program March 2005 Field Study tracer releases, sampling, and analytical methods are described in detail. There were two days where tracer releases and sampling were conducted. A total of 16.0 g of six tracers were released during the first test day or Intensive Observation Period (IOP) 1 and 15.7 g during IOP 2. Three types of sampling instruments were used in this study. Sequential air samplers, or SAS, collected six-minute samples, while Brookhaven atmospheric tracer samplers (BATS) and personal air samplers (PAS) collected thirty-minute samples. There were a total of 1300 samples resulting from the two IOPs. Confidence limits in the sampling and analysis method were 20% as determined from 100 duplicate samples. The sample recovery rate was 84%. The integrally averaged 6-minute samples were compared to the 30-minute samples. The agreement was found to be good in most cases. The validity of using a background tracer to calculate sample volumes was examined and also found to have a confidence level of 20%. Methods for improving sampling and analysis are discussed. The data described in this report are available as Excel files. An additional Excel file of quality assured tracer data for use in model validation efforts is also available. The file consists of extensively quality assured BATS tracer data with background concentrations subtracted.

  10. SOME ANALYTIC MODELS OF PASSIVE SOLAR BUILDING PERFORMANCE: A THEORETICAL APPROACH TO THE DESIGN OF ENERGY-CONSERVING BUILDINGS

    E-Print Network [OSTI]

    Goldstein, David Baird

    2011-01-01

    during construction. many passive houses have performed muchif it occurred, the optimwll passive house would likely havephotographs of a passive solar house at First Village in

  11. Utility of passive photography to objectively audit built environment features of active transport journeys: an observational study

    E-Print Network [OSTI]

    2013-01-01

    Foster C: Ethics of using Passive Automated Digital Image-Open Access Utility of passive photography to objectivelyfeatures captured using passive photog- raphy that may be

  12. RECIPROCAL PASSIVE MODE-LOCKING OF A RHODAMINE 6G DYE LASER AND THE Ar+ PUMP LASER

    E-Print Network [OSTI]

    Yasa, Zafer A.

    2013-01-01

    Letters RECIPROCAL PASSIVE MODE+LOCKING OF A RHODAMINE 6GCalifornia. RECIPROCAL PASSIVE MODE-LOCKING OF A RHODAMINEOctober 1980 RECIPROCAL PASSIVE MODE-LOCKING OF A RHODAMINE

  13. SOME ANALYTIC MODELS OF PASSIVE SOLAR BUILDING PERFORMANCE: A THEORETICAL APPROACH TO THE DESIGN OF ENERGY-CONSERVING BUILDINGS

    E-Print Network [OSTI]

    Goldstein, David Baird

    2011-01-01

    widespread application of passive solar designs. To design aF). OVERALL SUMMARY Passive solar design is one of severalfor a typical passive solar design, rendering this solution

  14. Population based exposure assessment methodology for carbon monoxide: Development of a Carbon Monoxide Passive Sampler and Occupational Dosimeter

    E-Print Network [OSTI]

    Apte, Michael G.

    2010-01-01

    Passive Colorimetric Dosimeter Tubes for Carbon Monoxide."Passive Colorimetric Dosimeter Tubes for Ammonia, CarbonPassive Badges, and Dosimeter Tubes." In: Air Sampling

  15. Predictions of tracer transport in interwell tracer tests at the C-Hole complex. Yucca Mountain site characterization project report milestone 4077

    SciTech Connect (OSTI)

    Reimus, P.W.

    1996-09-01

    This report presents predictions of tracer transport in interwell tracer tests that are to be conducted at the C-Hole complex at the Nevada Test Site on behalf of the Yucca Mountain Site Characterization Project. The predictions are used to make specific recommendations about the manner in which the tracer test should be conducted to best satisfy the needs of the Project. The objective of he tracer tests is to study flow and species transport under saturated conditions in the fractured tuffs near Yucca Mountain, Nevada, the site of a potential high-level nuclear waste repository. The potential repository will be located in the unsaturated zone within Yucca Mountain. The saturated zone beneath and around the mountain represents the final barrier to transport to the accessible environment that radionuclides will encounter if they breach the engineered barriers within the repository and the barriers to flow and transport provided by the unsaturated zone. Background information on the C-Holes is provided in Section 1.1, and the planned tracer testing program is discussed in Section 1.2.

  16. Tracers for monitoring the activity of sodium/glucose cotransporters in health and disease

    DOE Patents [OSTI]

    Wright, Ernest M; Barrio, Jorge R; Hirayama, Bruce A; Kepe, Vladimir

    2014-09-30

    Radiolabeled tracers for sodium/glucose cotransporters (SGLTs), their synthesis, and their use are provided. The tracers are methyl or ethyl pyranosides having an equatorial hydroxyl group at carbon-2 and a C 1 preferred conformation, radiolabeled with .sup.18F, .sup.123I, or .sup.124I, or free hexoses radiolabeled with .sup.18F, .sup.123I, or .sup.124. Also provided are in vivo and in vitro techniques for using these and other tracers as analytical and diagnostic tools to study glucose transport, in health and disease, and to evaluate therapeutic interventions.

  17. Kinematic Decoupling in Mechanisms and Application to a Passive Hand

    E-Print Network [OSTI]

    Hayward, Vincent

    Kinematic Decoupling in Mechanisms and Application to a Passive Hand Controller Design Vincent, 1992 Observations regarding the kinematics of mechanisms are applied to the synthesis of a passive hand In this article we apply observations regarding the kinematic properties of mechanisms to the design of a simple

  18. PASSIVE CONTROL OF FLUID POWERED HUMAN POWER AMPLIFIERS

    E-Print Network [OSTI]

    Li, Perry Y.

    PASSIVE CONTROL OF FLUID POWERED HUMAN POWER AMPLIFIERS Perry Y. Li and Venkat Durbha Center is proposed for the control of fluid powered human power amplifiers. Human power amplifiers are mechanical human power amplifier interacts with the human opeartor and other environments passively

  19. A notion of passivity for hybrid systems Milos Zefran

    E-Print Network [OSTI]

    Sontag, Eduardo

    on linear circuit the- ory was used for stability analysis in [7]. The most general stability results of hap- tic displays interacting with linear [5] and passive [6] en- vironments. Passivity analysis based Introduction In this paper we are primarily concerned with the stability analysis of systems that involve

  20. Liquid metal cooled nuclear reactors with passive cooling system

    DOE Patents [OSTI]

    Hunsbedt, Anstein (Los Gatos, CA); Fanning, Alan W. (San Jose, CA)

    1991-01-01

    A liquid metal cooled nuclear reactor having a passive cooling system for removing residual heat resulting from fuel decay during reactor shutdown. The passive cooling system comprises a plurality of cooling medium flow circuits which cooperate to remove and carry heat away from the fuel core upon loss of the normal cooling flow circuit to areas external thereto.

  1. Passive ice freezing-releasing heat pipe. [Patent application

    DOE Patents [OSTI]

    Gorski, A.J.; Schertz, W.W.

    1980-09-29

    A heat pipe device has been developed which permits completely passive ice formation and periodic release of ice without requiring the ambient temperature to rise above the melting point of water. This passive design enables the maximum amount of cooling capacity to be stored in the tank.

  2. Exploring the Cloud from Passive Measurements: the Amazon AWS Case

    E-Print Network [OSTI]

    Exploring the Cloud from Passive Measurements: the Amazon AWS Case Ignacio Bermudez, Stefano provider that offers computing, storage, and content delivery platforms. Leveraging passive measurements are represented by companies aiming at offering their services without carrying on costs and risks of building

  3. Modular Quantum Memories Using Passive Linear Optics and Coherent Feedback

    E-Print Network [OSTI]

    Modular Quantum Memories Using Passive Linear Optics and Coherent Feedback Hendra I. Nurdin photon pulsed optical field has a conceptually simple modular realization using only passive linear optics and coherent feedback. We exploit the idea that two decaying optical cavities can be coupled

  4. OBJECT TOPICALIZATION, PASSIVE, AND INFORMATION STRUCTURE IN JAPANESE

    E-Print Network [OSTI]

    OBJECT TOPICALIZATION, PASSIVE, AND INFORMATION STRUCTURE IN JAPANESE Tomoko Watanabe Research Centre for English and Applied Linguistics University of Cambridge Keynes House, Trumpington Street properties with the passive: foregrounding of the patient and de-topicalization of the agent. This fact makes

  5. DRAFT INTERIM REPORT: NATIONAL PROGRAM PLAN FOR PASSIVE AND HYBRID SOLAR HEATING AND COOLING

    E-Print Network [OSTI]

    Authors, Various

    2012-01-01

    Plan for Passive Solar Heating and Cooling builds upon theto design, build, finance, and market passive solar systems.a build- ings thermal energy requirements, Passive solar

  6. Energy and air quality implications of passive stack ventilation in residential buildings

    E-Print Network [OSTI]

    Mortensen, Dorthe Kragsig

    2011-01-01

    scaling the passive stack diameter with house size (floora single-story house ventilated by a passive stack with andTable 1: Passive stack diameters scaling with house size

  7. DRAFT INTERIM REPORT: NATIONAL PROGRAM PLAN FOR PASSIVE AND HYBRID SOLAR HEATING AND COOLING

    E-Print Network [OSTI]

    Authors, Various

    2012-01-01

    and Light Commercial Passive Solar Costs and Energy ImpactsLight Commercial Passive Solar Costs and Energy Impacts l~iledge of performance and costs of passive solar heating and

  8. DOE Tour of Zero Floorplans: Pumpkin Ridge Passive House by Hammer...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Pumpkin Ridge Passive House by Hammer and Hand DOE Tour of Zero Floorplans: Pumpkin Ridge Passive House by Hammer and Hand DOE Tour of Zero Floorplans: Pumpkin Ridge Passive House...

  9. Optimal Passive Dynamics for Torque/Force Control Kevin Kemper, Devin Koepl and Jonathan Hurst

    E-Print Network [OSTI]

    Hurst, Jonathan

    Optimal Passive Dynamics for Torque/Force Control Kevin Kemper, Devin Koepl and Jonathan Hurst software control strategy. Discussions about the passive dynamics are often imprecise, lacking's passive dynamics (stiffness, damping, motor inertia and torque limits) and the resulting performance

  10. THE PASSIVE SOLAR DESIGN PROCESS FOR A SMALL OFFICE/LABORATORY BUILDING

    E-Print Network [OSTI]

    Andersson, Brandt

    2011-01-01

    CA. October 22-26. 1979 THE PASSIVE SOLAR DESIGN PROCESS FORin preparation for the passive driving force -- solar gain.University of California. THE PASSIVE SOLAR DESIGN PROCESS

  11. The passive mechanical properties and protein composition of skeletal muscle change with Botulinum neurotoxin A treatment

    E-Print Network [OSTI]

    Thacker, Bryan Edward

    2008-01-01

    Pollack GH. (1997) Basis of passive tension and stiffness inHL, Irving TC. (1995) Passive tension in cardiac muscle:VI, Pollack GH. (1994) Passive and active tension in single

  12. DRAFT INTERIM REPORT: NATIONAL PROGRAM PLAN FOR PASSIVE AND HYBRID SOLAR HEATING AND COOLING

    E-Print Network [OSTI]

    Authors, Various

    2012-01-01

    the rate of new passive buildings construction indicates atools and marketable passive building designs has beenheat pipes to passive buildings. II.K.3 (H,C) Inves gate use

  13. THE PASSIVE SOLAR DESIGN PROCESS FOR A SMALL OFFICE/LABORATORY BUILDING

    E-Print Network [OSTI]

    Andersson, Brandt

    2011-01-01

    More and more passive solar buildings will be built in theroles for passive solar in small commercial buildings, in aPASSIVE SOLAR DESIGN PROCESS FOR A SMALL OFFICE/LABORATORY BUILDING

  14. A CLASSIFICATION SCHEME FOR THE COMMON PASSIVE AND HYBRID HEATING AND COOLING SYSTEMS

    E-Print Network [OSTI]

    Holtz, Michael J.

    2011-01-01

    Passive and Hybrid Heating Cooling Systems Michael]. Holtz,PASSIVE AND HYBRID HEATING AND COOLING SYSTEMS Michael J.of passive and hybrid space heating and cooling systems are

  15. Development of thermal performance criteria for residential passive solar buildings

    SciTech Connect (OSTI)

    Sabatiuk, P.A.; Cassel, D.E.; McCabe, M.; Scarbrough, C.

    1980-01-01

    In support of the development of thermal performance criteria for residential passive solar buildings, thermal design characteristics and anticipated performance for 266 projects in the HUD Passive Residential Design Competition and the HUD Cycle 5 Demonstration Program were analyzed. These passive residences are located in all regions of the United States requiring space heating, and they represent a variety of passive solar system types including direct gain, indirect gain, and solarium (isolated gain) systems. The results of this statistical analysis are being used to develop proposed minimum acceptable levels of thermal performance for passive solar buildings for the residential performance criteria. A number of performance measures were examined, including net solar contribution, solar fraction, and auxiliary energy use. These and other design and climate-related parameters were statistically correlated using the DATAPLOT computer program and standard statistical analysis techniques.

  16. Tensor anisotropy as a tracer of cosmic voids

    E-Print Network [OSTI]

    Bustamante, Sebastian

    2015-01-01

    We present a new method to find voids in cosmological simulations based on the tidal and the velocity shear tensors definitions of the cosmic web. We use the fractional anisotropy (FA) computed from the eigenvalues of each web scheme as a void tracer. We identify voids using a watershed transform based on the local minima of the FA field without making any assumption on the shape or structure of the voids. We test the method on the Bolshoi simulation and report on the abundance and radial averaged profiles for the density, velocity and fractional anisotropy. We find that voids in the velocity shear web are smaller than voids in the tidal web, with a particular overabundance of very small voids in the inner region of filaments/sheets. We classify voids as subcompensated/overcompansated depending on the absence/presence of an overdense matter ridge in their density profile, finding that close to $65\\%$ and $35\\%$ of the total population are classified into each category, respectively. Finally, we find evidence ...

  17. Chemical tracers of episodic accretion in low-mass protostars

    E-Print Network [OSTI]

    Visser, Ruud; Jorgensen, Jes K

    2015-01-01

    Aims: Accretion rates in low-mass protostars can be highly variable in time. Each accretion burst is accompanied by a temporary increase in luminosity, heating up the circumstellar envelope and altering the chemical composition of the gas and dust. This paper aims to study such chemical effects and discusses the feasibility of using molecular spectroscopy as a tracer of episodic accretion rates and timescales. Methods: We simulate a strong accretion burst in a diverse sample of 25 spherical envelope models by increasing the luminosity to 100 times the observed value. Using a comprehensive gas-grain network, we follow the chemical evolution during the burst and for up to 10^5 yr after the system returns to quiescence. The resulting abundance profiles are fed into a line radiative transfer code to simulate rotational spectra of C18O, HCO+, H13CO+, and N2H+ at a series of time steps. We compare these spectra to observations taken from the literature and to previously unpublished data of HCO+ and N2H+ 6-5 from th...

  18. Tracer diffusion in compacted, water-saturated bentonite

    SciTech Connect (OSTI)

    Bourg, Ian C.; Sposito, Garrison; Bourg, Alain C.M.

    2005-08-04

    Compacted Na-bentonite clay barriers, widely used in theisolation of solid-waste landfills and other contaminated sites, havebeen proposed for a similar use in the disposal of high-level radioactivewaste. Molecular diffusion through the pore space in these barriers playsa key role in their performance, thus motivating recent measurements ofthe apparent diffusion coefficient tensor of water tracers in compacted,water-saturated Na-bentonites. In the present study, we introduce aconceptual model in which the pore space of water-saturated bentonite isdivided into 'macropore' and 'interlayer nanopore' compartments. Withthis model we determine quantitatively the relative contributions ofpore-network geometry (expressed as a geometric factor) and of thediffusive behavior of water molecules near montmorillonite basal surfaces(expressed as a contristivity factor) to the apparent diffusioncoefficient tensor. Our model predicts, in agreement with experiment,that the mean principal value of the apparent diffusion coefficienttensor follows a single relationship when plotted against the partialmontmorillonite dry density (mass of montmorillonite per combined volumeof montmorillonite and pore space). Using a single fitted parameter, themean principal geometric factor, our model successfully describes thisrelationship for a broad range of bentonite-water system, from dilute gelto highly-compacted bentonite with 80 percent of its pore water ininterlayer nanopores.

  19. Identification and characterization of conservative organic tracers for use as hydrologic tracers for the Yucca Mountain site characterization study. Final report

    SciTech Connect (OSTI)

    Stetzenbach, K.; Farnham, I.

    1996-06-01

    Extensive tracer testing is expected to take place at the C-well complex in the Nevada Test Site as part of the Yucca Mountain Site Characterization Project. The C-well complex consists of one pumping well, C3, and two injection wells, C1 and C2 into which tracer will be introduced. The goal of this research was to provide USGS with numerous tracers to completed these tests. Several classes of fluorinated organic acids have been evaluated. These include numerous isomers of fluorinated benzoic acids, cinnamic acids, and salicylic acids. Also several derivatives of 2-hydroxy nicotinic acid (pyridone) have been tested. The stability of these compounds was determined using batch and column tests. Ames testing (mutagenicity/carcinogenicity) was conducted on the fluorinated benzoic acids and a literature review of toxicity of the fluorobenzoates and three perfluoro aliphatic acids was prepared. Solubilities were measured and method development work was performed to optimize the detection of these compounds. A Quality Assurance (QA) Program was developed under existing DOE and USGS guidelines. The program includes QA procedures and technical standard operating procedures. A tracer test, using sodium iodide, was performed at the C-well complex. HRC chemists performed analyses on site, to provide real time data for the USGS hydrologists and in the laboratories at UNLV. Over 2,500 analyses were performed. This report provides the results of the laboratory experiments and literature reviews used to evaluate the potential tracers and reports on the results of the iodide C-well tracer test.

  20. Passive, free-space laser gyroscope

    E-Print Network [OSTI]

    Korth, W Zach; Hall, Evan D; Arai, Koji; Gustafson, Eric K; Adhikari, Rana X

    2015-01-01

    Laser gyroscopes making use of the Sagnac effect have been used as highly accurate rotation sensors for many years. First used in aerospace and defense applications, these devices have more recently been used for precision seismology and in other research settings. In particular, mid-sized (~1 m-scale) laser gyros have been under development as tilt sensors to augment the adaptive active seismic isolation systems in terrestrial interferometric gravitational wave detectors. The most prevalent design is the "active" gyroscope, in which the optical ring cavity used to measure the Sagnac degeneracy breaking is itself a laser resonator. In this article, we describe another topology: a "passive" gyroscope, in which the sensing cavity is not itself a laser but is instead tracked using external laser beams. While subject to its own limitations, this design is free from the deleterious lock-in effects observed in active systems, and has the advantage that it can be constructed using commercially available components. ...

  1. Passive magnetic bearing for a horizontal shaft

    DOE Patents [OSTI]

    Post, Richard F.

    2003-12-02

    A passive magnetic bearing is composed of a levitation element and a restorative element. The levitation element is composed of a pair of stationary arcuate ferromagnetic segments located within an annular radial-field magnet array. The magnet array is attached to the inner circumference of a hollow shaft end. An attractive force between the arcuate segments and the magnet array acts vertically to levitate the shaft, and also in a horizontal transverse direction to center the shaft. The restorative element is comprised of an annular Halbach array of magnets and a stationary annular circuit array located within the Halbach array. The Halbach array is attached to the inner circumference of the hollow shaft end. A repulsive force between the Halbach array and the circuit array increases inversely to the radial space between them, and thus acts to restore the shaft to its equilibrium axis of rotation when it is displaced therefrom.

  2. Energy Signatures: A passive solar design tool

    SciTech Connect (OSTI)

    Balcomb, J.D.; Lekov, A.B.

    1987-12-01

    Energy signatures is a new technique for aiding a designer in selecting and sizing passive solar elements in a building. Hourly heat flux profiles for each candidate design element are determined. These profiles are then matched to the hourly energy requirement of the space accounting for weather conditions, internal heat profiles of the space, and the mass characteristics of the building. Simulation analysis techniques are used to determine the energy signatures and the building load profile, and to check the final result. Least-squares techniques are used to determine the optimum mix of strategies. Examples are given to illustrate development of the method up to the present time. In addition, future directions and possibilities are outlined. 5 refs., 28 figs., 3 tabs.

  3. Radium isotopes as tracers of coastal circulation pathways in the Mid-Atlantic Blight

    E-Print Network [OSTI]

    Rasmussen, Linda L

    2003-01-01

    Pathways of exchange between the shelf and slope in the Mid-Atlantic Bight were investigated using a combination of radiochemical tracer and hydrographic measurements. The motivation was to provide evidence of transport ...

  4. An automated tracer dispersal system for snow accumulation and saltation transport investigations

    E-Print Network [OSTI]

    Ratzlaff, Kenneth L.; Braaten, David A.

    1998-02-01

    . This instrument consists of an ultralow power timing system, a pneumatic system, and microsphere generators to periodically disperse a tracer of colored glass microspheres onto the snow surface. Snow sampling must be conducted before melting occurs, and subsequent...

  5. Development of Models to Simulate Tracer Behavior in Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Williams, Mark D.; Vermeul, Vincent R.; Reimus, P. W.; Newell, D.; Watson, Tom B.

    2010-06-01

    A recent report found that power and heat produced from engineered (or enhanced) geothermal systems (EGSs) could have a major impact on the United States while incurring minimal environmental impacts. EGS resources differ from high-grade hydrothermal resources in that they lack sufficient temperature distributions, permeability/porosity, fluid saturation, or recharge of reservoir fluids. Therefore, quantitative characterization of temperature distributions and the surface area available for heat transfer in EGS is necessary for commercial development of geothermal energy. The goal of this project is to provide integrated tracer and tracer interpretation tools to facilitate this characterization. Modeling capabilities are being developed as part of this project to support laboratory and field testing to characterize engineered geothermal systems in single- and multi-well tests using tracers. The objective of this report is to describe the simulation plan and the status of model development for simulating tracer tests for characterizing EGS.

  6. Inversion of field-scale partitioning tracer response for characterizing oil saturation distribution: a streamline approach

    E-Print Network [OSTI]

    Iliassov, Pavel Alexandrovich

    2000-01-01

    Identifying distribution of remaining oil in the reservoir is vital for evaluation of existing waterflood, design of tertiary recovery projects, and location of infill drilling candidates. In recent years, partitioning interwell tracer tests (PITT...

  7. Author's personal copy Thorium-234 as a tracer of spatial, temporal and vertical variability

    E-Print Network [OSTI]

    Buesseler, Ken

    Author's personal copy Thorium-234 as a tracer of spatial, temporal and vertical variability 2009 Accepted 6 April 2009 Available online 16 April 2009 Keywords: Thorium-234 Particle flux Sediment

  8. Dynamic Reservoir Characterization Of Naturally Fractured Reservoirs From An Inter-Well Tracer Test

    E-Print Network [OSTI]

    Kilicaslan, Ufuk

    2013-12-03

    After field redevelopment in the Sherrod Unit of the Spraberry Trend Area, an inter-well tracer test was conducted at the field scale in order to understand the fracture system, which forms preferential flow paths for ...

  9. High-resolution quantification of groundwater flux using a heat tracer: laboratory sandbox tests

    E-Print Network [OSTI]

    Konetchy, Brant Evan

    2014-12-31

    and groundwater flux. In this work, we constructed a sandbox to simulate a sand aquifer and performed a series of heat tracer tests under different flow rates. By analyzing the temperature responses among different tests, we developed a quantitative temperature...

  10. USE OF NATURALLY-OCCURRING TRACERS TO MONITOR TWO-PHASE CONDITIONS...

    Open Energy Info (EERE)

    USE OF NATURALLY-OCCURRING TRACERS TO MONITOR TWO-PHASE CONDITIONS IN THE COSO EGS PROJECT Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference...

  11. DRAFT INTERIM REPORT: NATIONAL PROGRAM PLAN FOR PASSIVE AND HYBRID SOLAR HEATING AND COOLING

    E-Print Network [OSTI]

    Authors, Various

    2012-01-01

    has been involved in funding solar energy research andwhich could impact funding of passive solar projects. E.excluded from funding, very few passive solar projects have

  12. DRAFT INTERIM REPORT: NATIONAL PROGRAM PLAN FOR PASSIVE AND HYBRID SOLAR HEATING AND COOLING

    E-Print Network [OSTI]

    Authors, Various

    2012-01-01

    IV. E. 2 Hold passive solar design competitions, the primarysolar heating. Passive solar design concepts and climacticor applied to pas- sive solar design. A major effort should

  13. Energy and air quality implications of passive stack ventilation in residential buildings

    E-Print Network [OSTI]

    Mortensen, Dorthe Kragsig

    2011-01-01

    of passive stack ventilation in residential buildings Dortheof passive stack ventilation in residential buildings Dorthepassive stack ventilation systems. They have been used for centuries to ventilate buildings

  14. DRAFT INTERIM REPORT: NATIONAL PROGRAM PLAN FOR PASSIVE AND HYBRID SOLAR HEATING AND COOLING

    E-Print Network [OSTI]

    Authors, Various

    2012-01-01

    build, finance, and market passive solar systems. Thepassive solar research, development, market field testing,passive solar research, development, market field testing,

  15. Urban Dispersion Program MSG05 Field Study: Summary of Tracer and Meteorological Measurements

    SciTech Connect (OSTI)

    Allwine, K Jerry; Flaherty, Julia E.

    2006-08-09

    The Urban Dispersion Program is a multi-year project, funded by the U.S. Department of Homeland Security, to better understand the flow and dispersion of airborne contaminants through and around the deep street canyons of New York City. The first tracer and meteorological field study was a limited study conducted during March 2005 near the Madison Square Garden in midtown Manhattan. Six safe, inert, gaseous perfluorocarbon tracers were released simultaneously at five street-level locations during two experimental days. In addition to collecting tracer data, meteorological data were also collected. Brookhaven National Laboratory conducted the bulk of the tracer and meteorological field efforts with Pacific Northwest National Laboratory and Stevens Institute of Technology assisting by measuring the vertical profile of winds. The Environmental Protection Agency worked with Brookhaven National Laboratory in accomplishing the personal exposure component of the study. This report presents some results from this analysis. In general, different release locations showed vastly different plume footprints for tracer materials, and the situation was made very complex with upwind and/or crosswind transport of tracer near street-level for the different release locations. Overall wind speeds and directions upwind and over the city were generally constant throughout each of the two experimental periods.

  16. SOME ANALYTIC MODELS OF PASSIVE SOLAR BUILDING PERFORMANCE: A THEORETICAL APPROACH TO THE DESIGN OF ENERGY-CONSERVING BUILDINGS

    E-Print Network [OSTI]

    Goldstein, David Baird

    2011-01-01

    during construction. many passive houses have performed muchif it occurred, the optimwll passive house would likely have

  17. Identification and characterization of conservative organic tracers for use as hydrologic tracers for the Yucca Mountain site characterization study. Progress report, October 1, 1994--December 31, 1994

    SciTech Connect (OSTI)

    Stetzenbach, K.; Farnham, I.

    1994-12-31

    The bromide anion has been used extensively as a tracer for mapping the flow of groundwater. It has proven to be both a safe and reliable groundwater tracer. The goal in this study is to find several tracing compounds with characteristics similar to the bromide anion to be used in multiple well tracing tests. Four groups of fluorinated organic acids were selected as candidates for groundwater tracers. These groups include fluorinated benzoic acids (FBA), fluorinated salicylic acids (FSA), fluorinated toluic acids (FTA), and fluorinated cinnamic acids (FCA). These compounds have been shown to move readily with the flow of water and do not adsorb to soil. They are also non-toxic. In this study, the retention of the fluorinated organic acids on to a soil column is compared to that of the bromide ion. The time required for the elution of each analyte from the soil column is measured using a UV-Vis detector. The soils consist of the light, medium, and dark tuffs used in the batch study. The work performed during this quarter consists of the continuation of the batch studies for the fluorinated benzoic acids and column studies for several potential tracer compounds.

  18. Pushing the Limits of SHA-3 Hardware Implementations to Fit on RFID

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    , there is the question of how far we can push the limits of Keccak to ful- fill the stringent requirements of passive low services. Hash functions are basic building blocks to implement, e.g., digital signatures or privacy-preserving protocols. However, it has been shown that these building blocks can not be im- plemented as efficient

  19. Indirect passive cooling system for liquid metal cooled nuclear reactors

    DOE Patents [OSTI]

    Hunsbedt, Anstein (Los Gatos, CA); Boardman, Charles E. (Saratoga, CA)

    1990-01-01

    A liquid metal cooled nuclear reactor having a passive cooling system for removing residual heat resulting from fuel decay during reactor shutdown. The passive cooling system comprises a plurality of partitions surrounding the reactor vessel in spaced apart relation forming intermediate areas for circulating heat transferring fluid which remove and carry away heat from the reactor vessel. The passive cooling system includes a closed primary fluid circuit through the partitions surrounding the reactor vessel and a partially adjoining secondary open fluid circuit for carrying transferred heat out into the atmosphere.

  20. Passive cooling safety system for liquid metal cooled nuclear reactors

    DOE Patents [OSTI]

    Hunsbedt, Anstein (Los Gatos, CA); Boardman, Charles E. (Saratoga, CA); Hui, Marvin M. (Sunnyvale, CA); Berglund, Robert C. (Saratoga, CA)

    1991-01-01

    A liquid metal cooled nuclear reactor having a passive cooling system for removing residual heat resulting from fuel decay during reactor shutdown. The passive cooling system comprises a plurality of partitions surrounding the reactor vessel in spaced apart relation forming intermediate areas for circulating heat transferring fluid which remove and carry away heat from the reactor vessel. The passive cooling system includes a closed primary fluid circuit through the partitions surrounding the reactor vessel and a partially adjoining secondary open fluid circuit for carrying transferred heat out into the atmosphere.

  1. The Sandia MEMS passive shock sensor : FY07 maturation activities.

    SciTech Connect (OSTI)

    Houston, Jack E.; Blecke, Jill; Mitchell, John Anthony; Wittwer, Jonathan W.; Crowson, Douglas A.; Clemens, Rebecca C.; Walraven, Jeremy Allen; Epp, David S.; Baker, Michael Sean

    2008-08-01

    This report describes activities conducted in FY07 to mature the MEMS passive shock sensor. The first chapter of the report provides motivation and background on activities that are described in detail in later chapters. The second chapter discusses concepts that are important for integrating the MEMS passive shock sensor into a system. Following these two introductory chapters, the report details modeling and design efforts, packaging, failure analysis and testing and validation. At the end of FY07, the MEMS passive shock sensor was at TRL 4.

  2. Passive solar systems performance under conditions in Bulgaria

    SciTech Connect (OSTI)

    Lekov, A.B.; Balcomb, J.D.

    1989-12-01

    This paper presents energy performance of 12 passive solar systems for three climatically different zones of Bulgaria. The results are compared with a base-case residential house that has a design typical for these areas. The different passive solar systems are compared on the basis of the percentage of solar savings and the yield, which is the annual net benefit of adding the passive solar system. The analyses are provided based on monthly meteorological data, and the method used for calculations is the Solar Load Ratio. Recommendations for Bulgarian conditions are given. 5 refs., 4 figs., 1 tab.

  3. ORISE: Policy Implementation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Policy Implementation The Oak Ridge Institute for Science and Education (ORISE) assists the U.S. Department of Energy (DOE) Office of Science in the implementation of its program...

  4. Efficient Repeated Implementation

    E-Print Network [OSTI]

    Lee, J; Sabourian, Hamid

    differences to what we have learned about implementation in the one-shot context. In particular, one-shot implementability does not imply repeated implementability if the agents can co-ordinate on histories, thereby creating other, possi- bly unwanted... , equilibria. 1The literature on dynamic mechanism design does not address the issue of full-implementation since it is concerned only with establishing the existence of a single equilibrium of some mechanism that possesses the desired properties. 1 To gain...

  5. In-Vessel Retention of Molten Core Debris in the Westinghouse AP1000 Advanced Passive PWR

    SciTech Connect (OSTI)

    Scobel, James H.; Conway, L.E. [Westinghouse Electric Company LLC, P.O. Box 355, Pittsburgh, PA 15230-0355 (United States); Theofanous, T.G. [Center for Risk Studies and Safety, University of California Santa Barbara (United States)

    2002-07-01

    In-vessel retention (IVR) of molten core debris via external reactor vessel cooling is the hallmark of the severe accident management strategies in the AP600 passive PWR. The vessel is submerged in water to cool its external surface via nucleate boiling heat transfer. An engineered flow path through the reactor vessel insulation provides cooling water to the vessel surface and vents steam to promote IVR. For the 600 MWe passive plant, the predicted heat load from molten debris to the lower head wall has a large margin to the critical heat flux on the external surface of the vessel, which is the upper limit of the cooling capability. Up-rating the power of the passive plant from 600 to 1000 MWe (AP1000) significantly increases the heat loading from the molten debris to the reactor vessel lower head in the postulated bounding severe accident sequence. To maintain a large margin to the coolability limit for the AP1000, design features and severe accident management (SAM) strategies to increase the critical heat flux on the external surface of the vessel wall need to be implemented. A test program at the ULPU facility at University of California Santa Barbara (UCSB) has been initiated to investigate design features and SAM strategies that can enhance the critical heat flux. Results from ULPU Configuration IV demonstrate that with small changes to the ex-vessel design and SAM strategies, the peak critical heat flux in the AP1000 can be increased at least 30% over the peak critical heat flux predicted for the AP600 configuration. The design and SAM strategy changes investigated in ULPU Configuration IV can be implemented in the AP1000 design and will allow the passive plant to maintain the margin to critical heat flux for IVR, even at the higher power level. Continued testing for IVR phenomena is being performed at UCSB to optimize the AP1000 design and to ensure that vessel failure in a severe accident is physically unreasonable. (authors)

  6. A Compositional Framework for Passive Linear Networks

    E-Print Network [OSTI]

    John C. Baez; Brendan Fong

    2015-07-24

    Passive linear networks are used in a wide variety of engineering applications, but the best studied are electrical circuits made of resistors, inductors and capacitors. We describe a category where a morphism is a circuit of this sort with marked input and output terminals. In this category, composition describes the process of attaching the outputs of one circuit to the inputs of another. We construct a functor, dubbed the "black box functor", that takes a circuit, forgets its internal structure, and remembers only its external behavior. Two circuits have the same external behavior if and only if they impose same relation between currents and potentials at their terminals. The space of these currents and potentials naturally has the structure of a symplectic vector space, and the relation imposed by a circuit is a Lagrangian linear relation. Thus, the black box functor goes from our category of circuits to the category of symplectic vector spaces and Lagrangian linear relations. We prove that this functor is a symmetric monoidal dagger functor between dagger compact categories. We assume the reader has some familiarity with category theory, but none with circuit theory or symplectic linear algebra.

  7. Non-Federal Interest: The sponsor for regional coordination is the Upper Mississippi, Illinois & Missouri Rivers Association (UMIMRA). Federal implementation planning for responsible Federal and non-Federal entities will be by the

    E-Print Network [OSTI]

    US Army Corps of Engineers

    submit to the Committee on Transportation and Infrastructure of the House of Representatives, implementing an elevated pump station authority under PL 84-99, and enacting an upland passive storage funding

  8. Development of the Passive Cooling Technique in China

    E-Print Network [OSTI]

    Zhou, J.; Wu, J.; Zhang, G.; Xu, Y.

    2006-01-01

    With more and more energy and environmental issues, the energy-saving and sustainable development of buildings is of utmost concern to the building industry. Passive cooling techniques can optimally utilize natural resources in order to reduce...

  9. The NASA Soil Moisture Active Passive (SMAP) mission: Overview

    E-Print Network [OSTI]

    O'Neill, Peggy

    The Soil Moisture Active Passive (SMAP) mission is one of the first Earth observation satellites being developed by NASA in response to the National Research Council's Decadal Survey. Its mission design consists of L-band ...

  10. A Semi-Passive Containment Cooling System Conceptual Design

    E-Print Network [OSTI]

    Liu, H.

    The objective of this project was to investigate a passive containment cooling system (PCCS) for the double concrete containment of the Korean Next Generation Reactor (KNGR). Two conceptual PCCS designs: the thermosyphon ...

  11. TRANSPARENT HEAT MIRRORS FOR PASSIVE SOLAR HEATING APPLICATIONS

    E-Print Network [OSTI]

    Selkowitz, S.

    2011-01-01

    surfaces in a passive solar-heated building is to maximizeBuildings and Community Systems. -i- TRANSPARENT HEATING MIRRORS FOR PASSIVEpassive solar systems. Architecturally, a window is a very complex building

  12. Developing a comprehensive software environment for passive solar design

    E-Print Network [OSTI]

    Lotz, Steven E

    1985-01-01

    This thesis is a journal which describes the thoughts and decisions leading up to the final design of a comprehensive software environment for passive solar design. The main purpose of this writing is to convey why a ...

  13. State of the art in passive solar heating

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1981-01-01

    The state of the art is outlined according to four major categories: passive solar practice, evaluation, design air, and products and materials. Needed future research activities and joint industry/government activities are listed. (MHR)

  14. Applications of passive control to electromechanical Carles Batlle

    E-Print Network [OSTI]

    Batlle, Carles

    Applications of passive control to electromechanical systems Carles Batlle Technical University 2 2 Electromechanical energy conversion 2 2.1 Electric capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3 Port hamiltonian system modelling 8 3.1 General electromechanical systems

  15. Conservation of Severely Damaged Paper Using Passivation Polymers

    E-Print Network [OSTI]

    Eilert, Eloise

    2012-10-19

    This work examined the use of passivation polymers in the conservation of severely damaged paper. It specifically investigated the use of this functional polymer treatment to address the issues of damage to paper caused ...

  16. Two earth sheltered passive solar residences with photovoltaic electricity

    SciTech Connect (OSTI)

    Strong, S.J.; Osten, R.J. Jr.

    1980-01-01

    The design and construction of two earth sheltered passive solar residence with photovoltaic electricity are described. The sizing and design of the P.V. system as well as the module fabrication and array integration are also discussed.

  17. Passive electromagnetic damping device for motion control of building structures

    E-Print Network [OSTI]

    Palomera-Arias, Rogelio, 1972-

    2005-01-01

    The research presented in this thesis develops a new device for the passive control of motion in building structures: an electromagnetic damper. The electromagnetic damper is a self-excited device that provides a reaction ...

  18. Solar air-conditioning-active, hybrid and passive

    SciTech Connect (OSTI)

    Yellott, J. I.

    1981-04-01

    After a discussion of summer air conditioning requirements in the United States, active, hybrid, and passive cooling systems are defined. Active processes and systems include absorption, Rankine cycle, and a small variety of miscellaneous systems. The hybrid solar cooling and dehumidification technology of desiccation is covered as well as evaporative cooling. The passive solar cooling processes covered include convective, radiative and evaporative cooling. Federal and state involvement in solar cooling is then discussed. (LEW)

  19. The development and field testing of a passive mercury dosimeter

    E-Print Network [OSTI]

    Zahray, Robert Karl

    1982-01-01

    THE DEVELOPMENT AND FIELD TESTING OF A PASSIVE MERCURY DOSIMETER A Thesis by ROBERT KARL ZAHRAY Submitted to t. he Graduate College of Texas AddS University in partial fulfillment of the requirements for the degree o' f MASTER OF SCIENCE... December 1982 Major Subject: Industrial Hygiene THE DEVELOPMENT AND FIELD TESTING OF A PASSIVE MERCURY DOSIMETER A Thesis by ROBERT KARL ZAHRAY Approved as to style and content by: R. J. mon (Chairman of . Committee) J. Su (Member K. Irgolic...

  20. Development of a passive soil gas flux sampler

    E-Print Network [OSTI]

    McQuown, Brian C

    1991-01-01

    was also identical to the laboratory procedure except for the insulated housing. The stainless steel canister was left in place between sampling events without the flow system. Experimental Procedure ? Land Treatment Unit. Passive samplers were also...DEVELOPMENT OF A PASSIVE SOIL GAS FLUX SAMPLER A Thesis by BRIAN C. McQUOWN Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December 1991...

  1. Passive solar in the United States: 1976-1986

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1986-01-01

    A decade of experience in passive solar development in the United States is reviewed. The evolution of the program through its peak in 1980 to the present is described. Methods of performance prediction and evaluation are discussed including analysis methods, design tools, test modules, and monitored buildings. Results of the monitoring show excellent performance, generally in agreement with the analysis. Passive practice is analyzed and problems are discussed. The current research program is described and potential savings are estimated.

  2. Recover Act. Verification of Geothermal Tracer Methods in Highly Constrained Field Experiments

    SciTech Connect (OSTI)

    Becker, Matthew W.

    2014-05-16

    The prediction of the geothermal system efficiency is strong linked to the character of the flow system that connects injector and producer wells. If water flow develops channels or short circuiting between injection and extraction wells thermal sweep is poor and much of the reservoir is left untapped. The purpose of this project was to understand how channelized flow develops in fracture geothermal reservoirs and how it can be measured in the field. We explored two methods of assessing channelization: hydraulic connectivity tests and tracer tests. These methods were tested at a field site using two verification methods: ground penetrating radar (GPR) images of saline tracer and heat transfer measurements using distributed temperature sensing (DTS). The field site for these studies was the Altona Flat Fractured Rock Research Site located in northeastern New York State. Altona Flat Rock is an experimental site considered a geologic analog for some geothermal reservoirs given its low matrix porosity. Because soil overburden is thin, it provided unique access to saturated bedrock fractures and the ability image using GPR which does not effectively penetrate most soils. Five boreholes were drilled in a five spot pattern covering 100 m2 and hydraulically isolated in a single bedding plane fracture. This simple system allowed a complete characterization of the fracture. Nine small diameter boreholes were drilled from the surface to just above the fracture to allow the measurement of heat transfer between the fracture and the rock matrix. The focus of the hydraulic investigation was periodic hydraulic testing. In such tests, rather than pumping or injection in a well at a constant rate, flow is varied to produce an oscillating pressure signal. This pressure signal is sensed in other wells and the attenuation and phase lag between the source and receptor is an indication of hydraulic connection. We found that these tests were much more effective than constant pumping tests in identifying a poorly connected well. As a result, we were able to predict which well pairs would demonstrate channelized flow. The focus of the tracer investigation was multi-ionic tests. In multi-ionic tests several ionic tracers are injected simultaneously and the detected in a nearby pumping well. The time history of concentration, or breakthrough curve, will show a separation of the tracers. Anionic tracers travel with the water but cationic tracer undergo chemical exchange with cations on the surface of the rock. The degree of separation is indicative of the surface area exposed to the tracer. Consequently, flow channelization will tend to decrease the separation in the breakthrough. Estimation of specific surface area (the ration of fracture surface area to formation volume) is performed through matching the breakthrough curve with a transport model. We found that the tracer estimates of surface area were confirmed the prediction of channelized flow between well pairs produced by the periodic hydraulic tests. To confirm that the hydraulic and tracer tests were correctly predicting channelize flow, we imaged the flow field using surface GPR. Saline water was injected between the well pairs which produced a change in the amplitude and phase of the reflected radar signal. A map was produced of the migration of saline tracer from these tests which qualitatively confirmed the flow channelization predicted by the hydraulic and tracer tests. The resolution of the GPR was insufficient to quantitatively estimate swept surface area, however. Surface GPR is not applicable in typical geothermal fields because the penetration depths do not exceed 10s of meters. Nevertheless, the method of using of phase to measure electrical conductivity and the assessment of antennae polarization represent a significant advancement in the field of surface GPR. The effect of flow character on fracture / rock thermal exchange was evaluated using heated water as a tracer. Water elevated 30 degrees C above the formation water was circulated between two wells pairs. One

  3. Advancing reactive tracer methods for measuring thermal evolution in CO2-and water-based geothermal reservoirs

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. This project aims to develop reactive tracer method for monitoring thermal drawdown in enhanced geothermal systems.

  4. Thermal single-well injection-withdrawal tracer tests for determining fracture-matrix heat transfer area

    E-Print Network [OSTI]

    Pruess, K.

    2011-01-01

    Stimulations at the European EGS Site Soultz-sous-Forts,Dual-Tracer Spikings during EGS Creation in Northern Germanenhanced geothermal systems (EGS) in rocks with insufficient

  5. Patient Positioning Based on a Radioactive Tracer Implanted in Patients With Localized Prostate Cancer: A Performance and Safety Evaluation

    SciTech Connect (OSTI)

    Kruijf, Willy J.M. de, E-mail: kruijf.de.w@bvi.nl [Institute Verbeeten, Tilburg (Netherlands); Verstraete, Jan [Department of Radiation Oncology, Leuven Cancer Institute, University Hospitals Leuven, Leuven (Belgium)] [Department of Radiation Oncology, Leuven Cancer Institute, University Hospitals Leuven, Leuven (Belgium); Neustadter, David [Navotek Medical Ltd, Yokneam (Israel)] [Navotek Medical Ltd, Yokneam (Israel); Corn, Benjamin W. [Tel Aviv Medical Center, Tel Aviv (Israel)] [Tel Aviv Medical Center, Tel Aviv (Israel); Hol, Sandra; Venselaar, Jack L.M. [Institute Verbeeten, Tilburg (Netherlands)] [Institute Verbeeten, Tilburg (Netherlands); Davits, Rob J.; Wijsman, Bart P. [TweeSteden Hospital, Tilburg (Netherlands)] [TweeSteden Hospital, Tilburg (Netherlands); Van den Bergh, Laura; Budiharto, Tom [Department of Radiation Oncology, Leuven Cancer Institute, University Hospitals Leuven, Leuven (Belgium)] [Department of Radiation Oncology, Leuven Cancer Institute, University Hospitals Leuven, Leuven (Belgium); Oyen, Raymond [Department of Radiology, University Hospitals Leuven, Leuven (Belgium)] [Department of Radiology, University Hospitals Leuven, Leuven (Belgium); Haustermans, Karin [Department of Radiation Oncology, Leuven Cancer Institute, University Hospitals Leuven, Leuven (Belgium)] [Department of Radiation Oncology, Leuven Cancer Institute, University Hospitals Leuven, Leuven (Belgium); Poortmans, Philip M.P. [Institute Verbeeten, Tilburg (Netherlands)] [Institute Verbeeten, Tilburg (Netherlands)

    2013-02-01

    Purpose: To evaluate the performance and safety of a radiation therapy positioning system (RealEye) based on tracking a radioactive marker (Tracer) implanted in patients with localized prostate cancer. Methods and Materials: We performed a single-arm multi-institutional trial in 20 patients. The iridium-192 ({sup 192}Ir)-containing Tracer was implanted in the patient together with 4 standard gold seed fiducials. Patient prostate-related symptoms were evaluated with the International Prostate Symptom Score (IPSS) questionnaire. Computed tomography (CT) was performed for treatment planning, during treatment, and after treatment to evaluate the migration stability of the Tracer. At 5 treatment sessions, cone beam CT was performed to test the positioning accuracy of the RealEye. Results: The Tracer was successfully implanted in all patients. No device or procedure-related adverse events occurred. Changes in IPSS scores were limited. The difference between the mean change in Tracer-fiducial distance and the mean change in fiducial-fiducial distance was -0.39 mm (95% confidence interval [CI] upper boundary, -0.22 mm). The adjusted mean difference between Tracer position according to RealEye and the Tracer position on the CBCT for all patients was 1.34 mm (95% CI upper boundary, 1.41 mm). Conclusions: Implantation of the Tracer is feasible and safe. Migration stability of the Tracer is good. Prostate patients can be positioned and monitored accurately by using RealEye.

  6. A passive transmitter for quantum key distribution with coherent light

    E-Print Network [OSTI]

    Marcos Curty; Marc Jofre; Valerio Pruneri; Morgan W. Mitchell

    2011-08-03

    Signal state preparation in quantum key distribution schemes can be realized using either an active or a passive source. Passive sources might be valuable in some scenarios; for instance, in those experimental setups operating at high transmission rates, since no externally driven element is required. Typical passive transmitters involve parametric down-conversion. More recently, it has been shown that phase-randomized coherent pulses also allow passive generation of decoy states and Bennett-Brassard 1984 (BB84) polarization signals, though the combination of both setups in a single passive source is cumbersome. In this paper, we present a complete passive transmitter that prepares decoy-state BB84 signals using coherent light. Our method employs sum-frequency generation together with linear optical components and classical photodetectors. In the asymptotic limit of an infinite long experiment, the resulting secret key rate (per pulse) is comparable to the one delivered by an active decoy-state BB84 setup with an infinite number of decoy settings.

  7. Laboratory testing and modeling to evaluate perfluorocarbon compounds as tracers in geothermal systems

    SciTech Connect (OSTI)

    Reimus, Paul W [Los Alamos National Laboratory

    2011-01-21

    The thermal stability and adsorption characteristics of three perfluorinated hydrocarbon compounds were evaluated under geothermal conditions to determine the potential to use these compounds as conservative or thermally-degrading tracers in Engineered (or Enhanced) Geothermal Systems (EGS). The three compounds tested were perfluorodimethyl-cyclobutane (PDCB), perfluoromethylcyclohexane (PMCH), and perfluorotrimethylcyclohexane (PTCH), which are collectively referred to as perfluorinated tracers, or PFTs. Two sets of duplicate tests were conducted in batch mode in gold-bag reactors, with one pair of reactors charged with a synthetic geothermal brine containing the PFTs and a second pair was charged with the brine-PFT mixture plus a mineral assemblage chosen to be representative of activated fractures in an EGS reservoir. A fifth reactor was charged with deionized water containing the three PFTs. The experiments were conducted at {approx}100 bar, with temperatures ranging from 230 C to 300 C. Semi-analytical and numerical modeling was also conducted to show how the PFTs could be used in conjunction with other tracers to interrogate surface area to volume ratios and temperature profiles in EGS reservoirs. Both single-well and cross-hole tracer tests are simulated to illustrate how different suites of tracers could be used to accomplish these objectives. The single-well tests are especially attractive for EGS applications because they allow the effectiveness of a stimulation to be evaluated without drilling a second well.

  8. Hot scatterers and tracers for the transfer of heat in collisional dynamics

    E-Print Network [OSTI]

    Raphael Lefevere; Lorenzo Zambotti

    2009-03-31

    We introduce stochastic models for the transport of heat in systems described by local collisional dynamics. The dynamics consists of tracer particles moving through an array of hot scatterers describing the effect of heat baths at fixed temperatures. Those models have the structure of Markov renewal processes. We study their ergodic properties in details and provide a useful formula for the cumulant generating function of the time integrated energy current. We observe that out of thermal equilibrium, the generating function is not analytic. When the set of temperatures of the scatterers is fixed by the condition that in average no energy is exchanged between the scatterers and the system, different behaviours may arise. When the tracer particles are allowed to travel freely through the whole array of scatterers, the temperature profile is linear. If the particles are locked in between scatterers, the temperature profile becomes nonlinear. In both cases, the thermal conductivity is interpreted as a frequency of collision between tracers and scatterers.

  9. Interpretations of Tracer Tests Performed in the Culebra Dolomite at the Waste Isolation Pilot Plant Site

    SciTech Connect (OSTI)

    MEIGS,LUCY C.; BEAUHEIM,RICHARD L.; JONES,TOYA L.

    2000-08-01

    This report provides (1) an overview of all tracer testing conducted in the Culebra Dolomite Member of the Rustler Formation at the Waste Isolation Pilot Plant (WPP) site, (2) a detailed description of the important information about the 1995-96 tracer tests and the current interpretations of the data, and (3) a summary of the knowledge gained to date through tracer testing in the Culebra. Tracer tests have been used to identify transport processes occurring within the Culebra and quantify relevant parameters for use in performance assessment of the WIPP. The data, especially those from the tests performed in 1995-96, provide valuable insight into transport processes within the Culebra. Interpretations of the tracer tests in combination with geologic information, hydraulic-test information, and laboratory studies have resulted in a greatly improved conceptual model of transport processes within the Culebra. At locations where the transmissivity of the Culebra is low (< 4 x 10{sup -6} m{sup 2}/s), we conceptualize the Culebra as a single-porosity medium in which advection occurs largely through the primary porosity of the dolomite matrix. At locations where the transmissivity of the Culebra is high (> 4 x 10{sup -6} m{sup 2}/s), we conceptualize the Culebra as a heterogeneous, layered, fractured medium in which advection occurs largely through fractures and solutes diffuse between fractures and matrix at multiple rates. The variations in diffusion rate can be attributed to both variations in fracture spacing (or the spacing of advective pathways) and matrix heterogeneity. Flow and transport appear to be concentrated in the lower Culebra. At all locations, diffusion is the dominant transport process in the portions of the matrix that tracer does not access by flow.

  10. An Integrated Approach to Characterizing Bypassed Oil in Heterogeneous and Fractured Reservoirs Using Partitioning Tracers

    SciTech Connect (OSTI)

    Akhil Datta-Gupta

    2006-12-31

    We explore the use of efficient streamline-based simulation approaches for modeling partitioning interwell tracer tests in hydrocarbon reservoirs. Specifically, we utilize the unique features of streamline models to develop an efficient approach for interpretation and history matching of field tracer response. A critical aspect here is the underdetermined and highly ill-posed nature of the associated inverse problems. We have investigated the relative merits of the traditional history matching ('amplitude inversion') and a novel travel time inversion in terms of robustness of the method and convergence behavior of the solution. We show that the traditional amplitude inversion is orders of magnitude more non-linear and the solution here is likely to get trapped in local minimum, leading to inadequate history match. The proposed travel time inversion is shown to be extremely efficient and robust for practical field applications. The streamline approach is generalized to model water injection in naturally fractured reservoirs through the use of a dual media approach. The fractures and matrix are treated as separate continua that are connected through a transfer function, as in conventional finite difference simulators for modeling fractured systems. A detailed comparison with a commercial finite difference simulator shows very good agreement. Furthermore, an examination of the scaling behavior of the computation time indicates that the streamline approach is likely to result in significant savings for large-scale field applications. We also propose a novel approach to history matching finite-difference models that combines the advantage of the streamline models with the versatility of finite-difference simulation. In our approach, we utilize the streamline-derived sensitivities to facilitate history matching during finite-difference simulation. The use of finite-difference model allows us to account for detailed process physics and compressibility effects. The approach is very fast and avoids much of the subjective judgments and time-consuming trial-and-errors associated with manual history matching. We demonstrate the power and utility of our approach using a synthetic example and two field examples. We have also explored the use of a finite difference reservoir simulator, UTCHEM, for field-scale design and optimization of partitioning interwell tracer tests. The finite-difference model allows us to include detailed physics associated with reactive tracer transport, particularly those related with transverse and cross-streamline mechanisms. We have investigated the potential use of downhole tracer samplers and also the use of natural tracers for the design of partitioning tracer tests. Finally, we discuss several alternative ways of using partitioning interwell tracer tests (PITTs) in oil fields for the calculation of oil saturation, swept pore volume and sweep efficiency, and assess the accuracy of such tests under a variety of reservoir conditions.

  11. in Integrated Passive Component Technology, R. Ulrich and L. Schaper editors, Wiley-IEEE Press, 2003. 13. The Economics of Embedded Passives

    E-Print Network [OSTI]

    Sandborn, Peter

    1 in Integrated Passive Component Technology, R. Ulrich and L. Schaper editors, Wiley-IEEE Press, 2003. 13. The Economics of Embedded Passives Peter A. Sandborn CALCE Electronic Products and Systems, testing, marketing, sustainment, and end-of-life of the product. The decision to convert discrete passives

  12. Passive-matrix-driven field-sequential-color displays Abstract --Passive-matrix-driven field-sequential-color (FSC) displays were successfully fabricated.

    E-Print Network [OSTI]

    Passive-matrix-driven field-sequential-color displays Y. W. Li L. Tan H. S. Kwok Abstract -- Passive-matrix-driven field-sequential-color (FSC) displays were successfully fabricated. It makes use of the display. Keywords -- Passive matrix, field-sequential color. 1 Introduction Field-sequential-color (FSC

  13. PICs Implementation Plan

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeeding access| Department of EnergyOpenGovTrackingDOE/WIPP 04-2301 Passive

  14. Passive solar design handbooks: Vol III: passive solar design analysis and supplement

    SciTech Connect (OSTI)

    Balcomb, J.D.; Jones, R.W.; Kosciewicz, C.E.; Lazarus, G.S.; McFarland, R.D.; Wray, W.O.

    1983-01-01

    This book applies the Los Alamos Solar Load Ratio (SLR) method to the design of passive solar heating systems, with an emphasis on the average annual heating energy consumption. Recommendations are given on minimizing heating energy consumption by appropriate choices of conservation level and solar system parameters. Analytical methods and supporting tables are presented which enable simple, fast estimates of the heating energy consumption as part of the design process. Topics considered include SLR correlations, the load collector ratio (LCR) method, sensitivity data, cooling considerations, conservation formulas, design procedure, life-cycle costs, high-mass direct gain buildings, low-mass sun-tempered buildings, sunspaces, off-reference night insulation, correlation equations, and mixed systems.

  15. Isotopic and geochemical tracers for U(VI) reduction and U mobility at an in situ recovery U mine

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Basu, Anirban; Brown, Shaun T.; Christensen, John N.; DePaolo, Donald J.; Reimus, Paul W.; Heikoop, Jeffrey M.; Woldegabriel, Giday; Simmons, Ardyth M.; House, Brian M.; Hartmann, Matt; et al

    2015-05-19

    In situ recovery (ISR) uranium (U) mining mobilizes U in its oxidized hexavalent form (U(VI)) by oxidative dissolution of U from the roll-front U deposits. Post-mining natural attenuation of residual U(VI) at ISR mines is a potential remediation strategy. Detection and monitoring of naturally occurring reducing subsurface environments are important for successful implementation of this remediation scheme. We used the isotopic tracers ?U/?U (??U), ?U/?U activity ratio, and ?S/S (??S), and geochemical measurements of U ore and groundwater collected from 32 wells located within, upgradient, and downgradient of a roll-front U deposit to detect U(VI) reduction and U mobility atmorean ISR mining site at Rosita, TX, USA. The ??U in Rosita groundwater varies from 0.61 to -2.49, with a trend toward lower ??U in downgradient wells. The concurrent decrease in U(VI) concentration and ??U with an ? of 0.48 0.08 is indicative of naturally occurring reducing environments conducive to U(VI) reduction. Additionally, characteristic ?U/?U activity ratio and ??S values may also be used to trace the mobility of the ore zone groundwater after mining has ended. These results support the use of U isotope-based detection of natural attenuation of U(VI) at Rosita and other similar ISR mining sites.less

  16. High performance photonic reservoir computer based on a coherently driven passive cavity

    E-Print Network [OSTI]

    Vinckier, Quentin; Smerieri, Anteo; Vandoorne, Kristof; Bienstman, Peter; Haelterman, Marc; Massar, Serge

    2015-01-01

    Reservoir computing is a recent bio-inspired approach for processing time-dependent signals. It has enabled a breakthrough in analog information processing, with several experiments, both electronic and optical, demonstrating state-of-the-art performances for hard tasks such as speech recognition, time series prediction and nonlinear channel equalization. A proof-of-principle experiment using a linear optical circuit on a photonic chip to process digital signals was recently reported. Here we present the first implementation of a photonic reservoir computer based on a coherently driven passive fiber cavity processing analog signals. Our experiment surpasses all previous experiments on a wide variety of tasks, and also has lower power consumption. Furthermore, the analytical model describing our experiment is also of interest, as it arguably constitutes the simplest high performance reservoir computer algorithm introduced so far. The present experiment, given its remarkable performances, low energy consumption...

  17. Using Thermally-Degrading, Partitioning, and Nonreactive Tracers to Determine Temperature Distribution and Fracture/Heat Transfer Surface Area in Geothermal Reservoirs

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Project Summary. The goal of this project is to provide integrated tracer and tracer interpretation tools to facilitate quantitative characterization of temperature distributions and surface area available for heat transfer in EGS.

  18. Cooperative Self-Propulsion of Active and Passive Rotors

    E-Print Network [OSTI]

    Yaouen Fily; Aparna Baskaran; M. Cristina Marchetti

    2011-10-26

    Using minimal models for low Reynolds number passive and active rotors in a fluid, we characterize the hydrodynamic interactions among rotors and the resulting dynamics of a pair of interacting rotors. This allows us to treat in a common framework passive or externally driven rotors, such as magnetic colloids driven by a rotating magnetic field, and active or internally driven rotors, such as sperm cells confined at boundaries. The hydrodynamic interaction of passive rotors is known to contain an azimuthal component \\sim 1/r^2 to dipolar order that can yield the recently discovered "cooperative self-propulsion" of a pair of rotors of opposite vorticity. While this interaction is identically zero for active rotors as a consequence of torque balance, we show that a \\sim 1/r^4 azimuthal component of the interaction arises in active systems to octupolar order. Cooperative self-propulsion, although weaker, can therefore also occur for pairs of active rotors.

  19. Carbon-13 Labeled Polymers: An Alternative Tracer for Depth Profiling of Polymer Films and

    E-Print Network [OSTI]

    Carbon-13 Labeled Polymers: An Alternative Tracer for Depth Profiling of Polymer Films profiling of polymer films and multilayers using secondary ion mass spectrometry (SIMS). Deuterium substitution has traditionally been used in depth profiling of polymers but can affect the phase behavior

  20. Controls on soil methane fluxes: Tests of biophysical mechanisms using stable isotope tracers

    E-Print Network [OSTI]

    Controls on soil methane fluxes: Tests of biophysical mechanisms using stable isotope tracers November 2006; published 4 May 2007. [1] Understanding factors that control methane exchange between soils-scale variations in soil methane emissions: (1) consumption of methane by methanotrophic bacteria, (2) quantity

  1. Using chemical tracers in hillslope soils to estimate the importance of chemical denudation under

    E-Print Network [OSTI]

    Mudd, Simon Marius

    Using chemical tracers in hillslope soils to estimate the importance of chemical denudation under mass. The model includes both sediment transport and chemical denudation. A simplified two-phase model is developed; the two phases are a chemically immobile phase, which has far lower solubility than the bulk soil

  2. Argon as a Tracer of Cross-Isopycnal Mixing in the Thermocline CARA C. HENNING

    E-Print Network [OSTI]

    Argon as a Tracer of Cross-Isopycnal Mixing in the Thermocline CARA C. HENNING University (Kelley and Van Scoy 1999), and observations of temperature or velocity microstructure measurements (e 1999), there is a consensus that the local cross-isopycnal diffusivity is on the order of 13 ( 10 5 m2

  3. Plumbing the Depths: Testing Natural Tracers of Subsurface CO2 Origin and

    E-Print Network [OSTI]

    Gilfillan, Stuart

    to be added to the CO2 at the time of injec- tion. This will marginally increase the cost of storagePlumbing the Depths: Testing Natural Tracers of Subsurface CO2 Origin and Migration, Utah Mark storage of fluid CO2 in porous subsurface rock will re- quire the ability to track, and identify

  4. New Tracers Identify Hydraulic Fracturing Fluids and Accidental Releases from Oil and Gas Operations

    E-Print Network [OSTI]

    Jackson, Robert B.

    New Tracers Identify Hydraulic Fracturing Fluids and Accidental Releases from Oil and Gas produced waters sampled from conventional oil and gas wells. We posit that boron isotope geochemistry can tool is validated by examining the composition of effluent discharge from an oil and gas brine

  5. Isotopic Tracer Studies of Reaction Pathways for Propane Oxidative Dehydrogenation on Molybdenum Oxide Catalysts

    E-Print Network [OSTI]

    Iglesia, Enrique

    Isotopic Tracer Studies of Reaction Pathways for Propane Oxidative Dehydrogenation on Molybdenum of propane over ZrO2-supported MoOx catalysts. Competitive reactions of C3H6 and CH3 13 CH2CH3 showed combustion of propene, or by direct combustion of propane. A mixture of C3H8 and C3D8 undergoes oxidative

  6. 6.7 GHZ METHANOL MASERS: PROPERTIES, ASSOCIATIONS AND TRACERS OF GALACTIC

    E-Print Network [OSTI]

    Richardson Jr., James E.

    6.7 GHZ METHANOL MASERS: PROPERTIES, ASSOCIATIONS AND TRACERS OF GALACTIC STRUCTURE A Dissertation Jagadheep Dhanasekara Pandian ALL RIGHTS RESERVED #12;6.7 GHZ METHANOL MASERS: PROPERTIES, ASSOCIATIONS transition of methanol is the strongest of methanol masers, and is the second strongest maser transition ever

  7. Chaotic Mixing of Tracer and Vorticity by Modulated Traveling Rossby Waves

    E-Print Network [OSTI]

    ,-- even though the physics of the present case is very different. We have produced two independent of subtler aspects of the mixing. It is shown the chaotic advection produces very nonlocal mixing which cannot be represented by eddy diffusivity. Also, the power spectrum of the tracer field is found to be k

  8. Tracer transport in the presence of steady zonal jets in a forced and viscous barotropic model

    E-Print Network [OSTI]

    Collier, Jonathan Craig

    2000-01-01

    to the time since release, and in the long-time limit, to the square root of the time. Tracers released into a fluid which was anisotropic and contained steady zonal jets, exhibited an inhibition of meridional excursion. However, the length scale associated...

  9. Analysis of Pollutant and Tracer Dispersion During a Prescribed Forest Burn

    E-Print Network [OSTI]

    Collins, Gary S.

    Analysis of Pollutant and Tracer Dispersion During a Prescribed Forest Burn Y. Wu1, G. Allwine1, X the potential for catastrophic wildfires and to improve the health of forests, however, emissions of pollutants from prescribed fires contribute to local and regional air quality issues and health impacts. Emissions

  10. TRACER: A Trace Replay Tool to Evaluate Energy-Efficiency of Mass Storage Systems

    E-Print Network [OSTI]

    Qin, Xiao

    TRACER: A Trace Replay Tool to Evaluate Energy-Efficiency of Mass Storage Systems Zhuo Liu1 , Fei for Optoelectronics 1 Key Laboratory of Data Storage Systems,Ministry of Education of China 1 School of Computer Sci://www.eng.auburn.edu/xqin * Corresponding Author: wufei@hust.edu.cn Abstract--Improving energy efficiency of mass storage systems has become

  11. Verification of flow processes in soils with combined sprinkling and dye tracer experiments

    E-Print Network [OSTI]

    Weiler, Markus

    1 Verification of flow processes in soils with combined sprinkling and dye tracer experiments. Water flow in soils is influenced by macropores, by the heterogeneity of the soil matrix, and by the exchange of water between macropores and the soil matrix (interaction). The degree of interaction

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

    SciTech Connect (OSTI)

    Mitchell A. Plummer; Carl D. Palmer; Earl D. Mattson; George D. Redden; Laurence C. Hull

    2010-10-01

    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.

  13. Marine Chemistry special issue: The renaissance of radium isotopic tracers in marine processes studies

    E-Print Network [OSTI]

    by the Marine Environment Laboratories, International Atomic Energy Agency (IAEA-MEL). There were 26Editorial Marine Chemistry special issue: The renaissance of radium isotopic tracers in marine interpretation and modeling of radium measurements in marine systems as well as perspectives on special

  14. Tracer Gas as a Practical Field Diagnostic Tool for Assessing Duct System Leaks

    E-Print Network [OSTI]

    Cummings, J. B.

    1989-01-01

    diagnostic tools for detecting and locating leaks in the air distribution system. The tracer gas tests described are a good complement to these tools in the detection, location, and measurement of duct leakage. Testing for house infiltration once with the air...

  15. Cigarette, cigar and pipe smoking, passive smoke exposure, and risk of pancreatic cancer: a population-based study in the San Francisco Bay Area

    E-Print Network [OSTI]

    Tranah, Gregory J; Holly, Elizabeth A; Wang, Furong; Bracci, Paige M

    2011-01-01

    cigarette smoking, household passive smoke exposure, and theb 1.0 (Ref. ) Passive exposure to household and workplaceIn this study, passive exposure to household and workplace

  16. Passive magnetic bearing element with minimal power losses

    DOE Patents [OSTI]

    Post, R.F.

    1998-12-08

    Systems employing passive magnetic bearing elements having minimal power losses are provided. Improved stabilizing elements are shown, employing periodic magnet arrays and inductively loaded circuits, but with improved characteristics compared to the elements disclosed in US Patent No. 5,495,221 entitled ``Dynamically Stable Magnetic Suspension/Bearing System.`` The improvements relate to increasing the magnitude of the force derivative, while at the same time reducing the power dissipated during the normal operation of the bearing system, to provide a passive bearing system that has virtually no losses under equilibrium conditions, that is, when the supported system is not subject to any accelerations except those of gravity. 8 figs.

  17. Passive magnetic bearing element with minimal power losses

    DOE Patents [OSTI]

    Post, Richard F. (Walnut Creek, CA)

    1998-01-01

    Systems employing passive magnetic bearing elements having minimal power losses are provided. Improved stabilizing elements are shown, employing periodic magnet arrays and inductively loaded circuits, but with improved characteristics compared to the elements disclosed in U.S. Patent No. 5,495,221 entitled "Dynamically Stable Magnetic Suspension/Bearing System." The improvements relate to increasing the magnitude of the force derivative, while at the same time reducing the power dissipated during the normal operation of the bearing system, to provide a passive bearing system that has virtually no losses under equilibrium conditions, that is, when the supported system is not subject to any accelerations except those of gravity.

  18. The development of a passive dosimeter for chlorine gas

    E-Print Network [OSTI]

    Montier, Earl Woodson

    1981-01-01

    I'HE DEVELOPMENT OF A PASSIVE DOSIMETER FOR CHLORINE GAS A Thesis EARL WOODSON MONTIER, JR. Submitt* d to the Graduate College of Texas A&M Cniversity in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE December 198... Major Subject: Industrial Hygiene THE DEVELOPNENT CF A PASSIVE DOSII'%TER FOR CHLORINE GAS A Tbesis EARL %GODSON NONTIER JR. Appcoved as to style and content by: Chainman Co ttee ad of Depart ent 7 g Herbe' i'iembe December 981 ABSTRA CT...

  19. The development of a passive dosimeter for airborne aniline vapors

    E-Print Network [OSTI]

    Campbell, James Evan

    1977-01-01

    and Gunnison applied the laws of passive diffusion in 3 the development of a quantitative personal monitoring device for SO and stated that this principle should be applicable to other gases and vapors in the industrial as well as the community environment... The purpose of this investigation was to determine the most effective tube length of a passive diffusion dosimeter for aniline, similar to that developed by Palmes for SO 3 In order to calibrate any air sampling device a reliable and known concentration...

  20. October 2008 Implementation Manual

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    original implementation budget (i.e., budget at start of rate period) LED Light-emitting diode Low-income Low income household eligibility is defined in the Federal...

  1. Implementing Motor Management

    E-Print Network [OSTI]

    Colip, R. L.

    2002-01-01

    PRESIDENT-SALES, BALDOR ELECTRlC COMPANY, FORT SMITH, ARKANSAS IMPLEMENTING MOTOR MANAGEMENT ABSTRACT Electric motors account for sixty five percent of industrial energy consumed today. There are many opportunities to conserve electricity by using more...

  2. GEOMETRIC DESIGN OF A PASSIVE MECHANICAL KNEE FOR LOWER EXTREMITY WEARABLE DEVICES BASED ON ANTHROPOMORPHIC FOOT TASK GEOMETRY SCALING

    E-Print Network [OSTI]

    Ghosh, S; Robson, N; McCarthy, JM

    2015-01-01

    2004. On the modeling of passive motion of the human kneeGEOMETRIC DESIGN OF A PASSIVE MECHANICAL KNEE FOR LOWERsynthesis of a planar passive four-bar linkage that can be

  3. Identity of Passive Film Formed on Aluminum in Li-ion Battery Electrolytes with LiPF6

    E-Print Network [OSTI]

    Zhang, Xueyuan; Devine, T.M.

    2008-01-01

    Influence Formation of AlF 3 Passive Film on Aluminum in Li-Identity of Passive Film Formed on Aluminum in Li-ionEngineering Abstract The passive film that forms on aluminum

  4. SOME ANALYTIC MODELS OF PASSIVE SOLAR BUILDING PERFORMANCE: A THEORETICAL APPROACH TO THE DESIGN OF ENERGY-CONSERVING BUILDINGS

    E-Print Network [OSTI]

    Goldstein, David Baird

    2011-01-01

    performance of 5 passive buildings. 3a. See Ref. 3a and thewell-performing passive building requires the use of anwork for unmanaged passive buildings; that is, buildings

  5. A Study Plan for Determining Recharge Rates at the Hanford Site Using Environmental Tracers

    SciTech Connect (OSTI)

    Murphy,, E. M.; Szecsody,, J. E.; Phillips,, S. J.

    1991-02-01

    This report presents a study plan tor estimating recharge at the Hanford Site using environmental tracers. Past operations at the Hanford Site have led to both soil and groundwater contamination, and recharge is one of the primary mechanisms for transporting contaminants through the vadose zone and into the groundwater. The prediction of contaminant movement or transport is one aspect of performance assessment and an important step in the remedial investigation/feasibility study (RI/FS) process. In the past, recharge has been characterized by collecting lysimeter data. Although lysimeters can generate important and reliable data, their limitations include 1) fixed location, 2) fixed sediment contents, 3) edge effects, 4) low rates, and 5) relatively short duration of measurement. These limitations impact the ability to characterize the spatial distribution of recharge at the Hanford Site, and thus the ability to predict contaminant movement in the vadose zone. An alternative to using fixed lysimeters for determining recharge rates in the vadose zone is to use environmental tracers. Tracers that have been used to study water movement in the vadose zone include total chloride, {sup 36}CI, {sup 3}H, and {sup 2}H/{sup 18}O. Atmospheric levels of {sup 36}CI and {sup 3}H increased during nuclear bomb testing in the Pacific, and the resulting "bomb pulse" or peak concentration can be measured in the soil profile. Locally, past operations at the Hanford Site have resu~ed in the atmospheric release of numerous chemical and isotopic tracers, including nitrate, {sup 129}I, and {sup 99}Tc. The radionuclides, in particular, reached a well-defined atmospheric peak in 1945. Atmospheric releases of {sup 129}I and {sup 99}Tc were greatly reduced by mid-1946, but nitrogen oxides continued to be released from the uranium separations facilities. As a result, the nitrate concentrations probably peaked in the mid-1950s, when the greatest number of separations facilities were operating. Seven study sites on the Hanford Site have been selected, in two primary soil types that are believed to represent the extremes in recharge, the Quincy sand and the Warden silt loam. An additional background study site upwind of the Hanford facilities has been chosen at the Yakima Firing Center. Study sites at Hanford were chosen close to micrometeorology stations on downwind transects from the operational facilities. Initial testing will be done on sites that lack perennial vegetation. Six tracer techniques (total chlortde, {sup 36}Cl, {sup 3}H, nitrate, {sup 129}I, and {sup 99}Tc) will be tested on at least one site in the Quincy sand, one site in the Warden si~ loam, and the background site, to determine which combination of tracers wortks best for a given soil type. In subsequent years, additional sites will be investigated to determine the effect of vegetation on recharge estimates and on the performance of individual tracers. The use of environmental tracers is perhaps the only cost-effective method for estimating the spatial vartability of recharge at a site as large as Hanford. The tracer techniques used at Hanford have wide applicability at other and sites operated by the U.S. Department of Energy as well as at low-level radioactive waste disposal sites.

  6. Prototype Passive Solar Buildings in Louisiana - A Hot-Humid Climate

    E-Print Network [OSTI]

    Shih, J. C.

    1986-01-01

    This paper on prototype passive solar buildings in Louisiana presents state of the art passive solar design. According to U.S. Department of Energy report, the annual energy consumption for a single family detached dwelling ...

  7. Catalyst Design for Urea-less Passive Ammonia SCR Lean-Burn SIDI...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Design for Urea-less Passive Ammonia SCR Lean-Burn SIDI Aftertreatment System Catalyst Design for Urea-less Passive Ammonia SCR Lean-Burn SIDI Aftertreatment System Lean-burn SIDI...

  8. THE PASSIVE SOLAR DESIGN PROCESS FOR A SMALL OFFICE/LABORATORY BUILDING

    E-Print Network [OSTI]

    Andersson, Brandt

    2011-01-01

    22-26. 1979 THE PASSIVE SOLAR DESIGN PROCESS FOR A SMALLof California. THE PASSIVE SOLAR DESIGN PROCESS FOR A SMALLadvantages of pas- sive solar design for a small cornmercial

  9. AEROSPACE TECHNOLOGY REVIEW FOR LBL WINDOW/PASSIVE SOLAR PROGRAM FINAL REPORT

    E-Print Network [OSTI]

    Viswanathan, R.

    2011-01-01

    Section 4) A. PASSIVE SOLAR DESIGN B. HEA T PIPES C. INSU LAreviews). D-15 A. PASSIVE SOLAR DESIGN J D, Balcomb, J. Cois valuable for pas- sive solar designs of buried or bermed

  10. Optimal self assembly of modular manipulators with active and passive modules

    E-Print Network [OSTI]

    Yun, Seung-kook

    2009-01-01

    In this thesis, we describe algorithms to build self-assembling robot systems composed of active modular robots and passive bars. The robotic module is the Shady3D robot and the passive component is a rigid bar with embedded ...

  11. The accuracy of three passive dosimeters as compared to charcoal tubes

    E-Print Network [OSTI]

    Junco, Lynnea Goodley

    1995-01-01

    Passive monitors have become increasingly popular for monitoring airborne contaminants because they are lightweight, inexpensive, and easy to use. A passive or diffusive sampler is a device which is capable of taking samples of gas or vapor...

  12. Effect of passivation on stress relaxation in electroplated copper films

    E-Print Network [OSTI]

    Huang, Rui

    Effect of passivation on stress relaxation in electroplated copper films Dongwen Gan and Paul S. Ho of interfacial mass transport by measuring stress relaxation in electroplated Cu films with four different cap examined.3,4 In particular, Hu et al.3 demonstrated a significant improvement in the EM lifetime by coating

  13. AEROSOL ABSORPTION IN CLOUDY SCENES USING PASSIVE SATELLITE INSTRUMENTS

    E-Print Network [OSTI]

    Graaf, Martin de

    AEROSOL ABSORPTION IN CLOUDY SCENES USING PASSIVE SATELLITE INSTRUMENTS M. de Graaf, L.G. Tilstra information has become available from active space-based sensors and some dedicated field campaigns on aerosol-absorption, is the Absorbing Aerosol Index (AAI), which can indicate absorbing aerosols overlying clouds. The AAI is available

  14. Performance Benefits in Passive Vehicle Suspensions Employing Inerters1

    E-Print Network [OSTI]

    Cambridge, University of

    element in networks has the disadvantage that electrical circuits with ungrounded capacitors do not have different measures in a quarter-car model is demonstrated here in comparison with a conventional passive suspension strut. A study of a full-car model is also undertaken where performance improvements are also

  15. GLOBAL AEROSOL EFFECT RETRIEVAL FROM PASSIVE HYPERSPECTRAL MEASUREMENTS

    E-Print Network [OSTI]

    Graaf, Martin de

    that can be detected using UV reflectance measurements. Since the aerosol extinction optical thickness any instrument, or a combination of instruments, that measures UV, visible and SWIR reflectancesGLOBAL AEROSOL EFFECT RETRIEVAL FROM PASSIVE HYPERSPECTRAL MEASUREMENTS M. de Graaf1,2 , L. G

  16. Passivhus Norden 2008 1st Nordic passive house conference

    E-Print Network [OSTI]

    Hansen, Ren Rydhof

    :00 Jrn Stene CO2 Heat Pump System for Space Heating and Hot Water Heating in Low-Energy Houses-Efficiency Heat Pump Water Heater System for Apartment Buildings of Passive House Standard...........57 SESSION 3, Bengt Perers, Bjrn Karlsson Performance of a multifunctional PV/T hybrid solar window

  17. Passive cooling system for nuclear reactor containment structure

    DOE Patents [OSTI]

    Gou, Perng-Fei (Saratoga, CA); Wade, Gentry E. (Saratoga, CA)

    1989-01-01

    A passive cooling system for the contaminant structure of a nuclear reactor plant providing protection against overpressure within the containment attributable to inadvertent leakage or rupture of the system components. The cooling system utilizes natural convection for transferring heat imbalances and enables the discharge of irradiation free thermal energy to the atmosphere for heat disposal from the system.

  18. Natural circulating passive cooling system for nuclear reactor containment structure

    DOE Patents [OSTI]

    Gou, Perng-Fei (Saratoga, CA); Wade, Gentry E. (Saratoga, CA)

    1990-01-01

    A passive cooling system for the contaminant structure of a nuclear reactor plant providing protection against overpressure within the containment attributable to inadvertent leakage or rupture of the system components. The cooling system utilizes natural convection for transferring heat imbalances and enables the discharge of irradiation free thermal energy to the atmosphere for heat disposal from the system.

  19. Entirely passive heat pipe apparatus capable of operating against gravity

    DOE Patents [OSTI]

    Koenig, Daniel R. (Santa Fe, NM)

    1982-01-01

    The disclosure is directed to an entirely passive heat pipe apparatus capable of operating against gravity for vertical distances in the order of 3 to 7 meters and more. A return conduit into which an inert gas is introduced is used to lower the specific density of the working fluid so that it may be returned a greater vertical distance from condenser to evaporator.

  20. Gaussian state interferometry with passive and active elements

    E-Print Network [OSTI]

    Carlo Sparaciari; Stefano Olivares; Matteo G. A. Paris

    2015-10-28

    We address precision of optical interferometers fed by Gaussian states and involving passive and/or active elements, such as beam splitters, photodetectors and optical parametric amplifiers. We first address the ultimate bounds to precision by discussing the behaviour of the quantum Fisher information. We then consider photodetection at the output and calculate the sensitivity of the interferometers taking into account the non unit quantum efficiency of the detectors. Our results show that in the ideal case of photon number detectors with unit quantum efficiency the best configuration is the symmetric one, namely, passive (active) interferometer with passive (active) detection stage: in this case one may achieve Heisenberg scaling of sensitivity by suitably optimizing over Gaussian states at the input. On the other hand, in the realistic case of detectors with non unit quantum efficiency, the performances of passive scheme are unavoidably degraded, whereas detectors involving optical parametric amplifiers allow to fully compensate the presence of loss in the detection stage, thus restoring the Heisenberg scaling.

  1. Ultra-Low Power Time Synchronization Using Passive Radio Receivers

    E-Print Network [OSTI]

    Amir, Yair

    Ultra-Low Power Time Synchronization Using Passive Radio Receivers Yin Chen Qiang Wang Marcus Chang. In this pa- per, we present an inexpensive and ultra-low power ( of elapsed seconds. The universal time sig- nal receiver combines an off-the-shelf radio chip with an ultra-low

  2. PASSIVE ACOUSTIC SENSOR NETWORK LOCALIZATION; APPLICATION TO STRUCTURE GEOMETRY MONITORING

    E-Print Network [OSTI]

    Boyer, Edmond

    work in passive identification was conducted in structural health monitoring [6], acoustic [17] and seismology [2]. In structural health monitoring, applications were released to deter- mine structural and discussed. Experimental 7th European Workshop on Structural Health Monitoring July 8-11, 2014. La Cit

  3. Optimization of a Fully-Passive Flapping-Airfoil Turbine

    E-Print Network [OSTI]

    Optimization of a Fully-Passive Flapping-Airfoil Turbine Mmoire Jean-Christophe Veilleux Matrise. De telles oscillations pourraient ^etre utilisees afin de developper un nouveau type de turbine Reynolds de 500 000, ce type de turbine est optimise et amplement etudie afin de developper une

  4. Passive-Solar-Heating Analysis: a new ASHRAE manual

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1983-01-01

    The forthcoming ASHRAE book, Passive Solar Heating Analysis, is described. ASHRAE approval procedures are discussed. An overview of the contents is given. The development of the solar load ratio correlations is described, and the applicability of the analysis method is discussed.

  5. Thermal performance of an earth-sheltered passive solar residence

    SciTech Connect (OSTI)

    LaVigne, A.B. (Puget Sound Power and Light Co., Bellevue, WA); Schuldt, M.A.

    1981-01-01

    Results are presented of the measured thermal performance of a direct gain, passive solar residence in the Pacific Northwest. The east, west, and north exterior walls of the house are bermed to within 12 inches (30 cm) of the ceiling; sliding interior insulated panels cover the double glazed, south facing windows when appropriate. The cost of the house construction was kept modest.

  6. Automated Target Recognition Using Passive Radar and Coordinated Flight Models

    E-Print Network [OSTI]

    Lanterman, Aaron

    of altitude and range. The Numerical Electromagnetic Code (NEC2) computes the antenna gain pattern, so Georgia Institute of Technology, Atlanta, GA 30332, USA ABSTRACT Rather than emitting pulses, passive system is in the transmitter, whereas designers of "hitchhiking" or "parasitic" radars have high

  7. Passive Synthetic Aperture Radar Imaging of Ground Moving Targets

    E-Print Network [OSTI]

    Yazici, Birsen

    waves due to illuminating sources of opportunity such as commercial television, radio, and cell phone of opportunity such as radio, cell phone, and television transmission towers. The absence of active signal synthetic aperture radar. A passive radar imaging system uses small, mobile receivers that do not radiate

  8. Simple procedure for schematic design of passive solar buildings

    SciTech Connect (OSTI)

    Wray, W.O.; Kosiewicz, C.E.

    1984-01-01

    A simple procedure for use during the schematic phase of passive solar building design is presented in this article. The procedure is quantitative and accurate enough to insure that designs based on the provided starting point values of the primary building parameters will be cost effective.

  9. Passive Neutron Detection in Ports for Homeland Security Applications

    E-Print Network [OSTI]

    Pedicini, Eowyn E

    2013-05-07

    for the detection of SNM being carried on small, personal watercraft. Previous work examined the possibility of using active neutron detectors to induce fission in SNM and detect the response. This thesis examines the possibility of detecting SNM using passive 3He...

  10. Tracking and disturbance rejection for passive nonlinear systems Bayu Jayawardhana

    E-Print Network [OSTI]

    Sontag, Eduardo

    signals of frequency . If the reference and disturbance signals are periodic, then the internal modelTracking and disturbance rejection for passive nonlinear systems Bayu Jayawardhana Abstract tracking of constant reference signal and disturbance rejection of a finite superposition of sine waves

  11. Risk-informed design changes for a passive cooling system

    E-Print Network [OSTI]

    Patalano, Giovanbattista

    2007-01-01

    The failure probability of a passive decay heat removal system after a LOCA is evaluated as part of a risk-informed design process for a helium-cooled fast reactor. The system was modeled using RELAP5-3D. The epistemic ...

  12. Calculating failure probabilities of passive systems during transients

    E-Print Network [OSTI]

    Mackay, Francisco J

    2007-01-01

    A time-dependent reliability evaluation of a two-loop passive Decay Heat Removal (DHR) system was performed as part of the iterative design process for a helium-cooled fast reactor. The system was modeled using RELAP5-3D. ...

  13. THE PASSIVE SOLAR DESIGN PROCESS FOR A SMALL OFFICE/LABORATORY BUILDING

    E-Print Network [OSTI]

    Andersson, Brandt

    2011-01-01

    and underground thermal storage), the passive solar redesignCollec- tion, storage, and distribution of solar energy in

  14. KinSpace: Passive Obstacle Detection via Kinect Chris Greenwood1

    E-Print Network [OSTI]

    Stankovic, John A.

    to household objects left in open spaces. We present KinSpace, a passive obstacle detection system for the homeKinSpace: Passive Obstacle Detection via Kinect Chris Greenwood1 , Shahriar Nirjon1 , JohnSpace: Passive Obstacle Detection via Kinect This gives clear motivation for the development of a system

  15. Journal of Power Sources 160 (2006) 10581064 Passive direct formic acid microfabricated fuel cells

    E-Print Network [OSTI]

    Kenis, Paul J. A.

    2006-01-01

    Journal of Power Sources 160 (2006) 10581064 Passive direct formic acid microfabricated fuel cells on microscale silicon-based direct formic acid fuel cells (Si-DFAFCs) in which the fuel and the oxidant are supplied to the electrodes in a passive manner. Passive delivery of fuel and oxidant eliminates the need

  16. Bio-implantable passive on-chip RF-MEMS strain sensing resonators for orthopaedic applications

    E-Print Network [OSTI]

    Demir, Hilmi Volkan

    Bio-implantable passive on-chip RF-MEMS strain sensing resonators for orthopaedic applications. Micromech. Microeng. 18 (2008) 115017 (9pp) doi:10.1088/0960-1317/18/11/115017 Bio-implantable passive on designed novel, bio-implantable, passive, on-chip, RF-MEMS strain sensors that rely on the resonance

  17. Active and Passive Learning in Agent-based Financial Markets Blake LeBaron

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    Active and Passive Learning in Agent-based Financial Markets Blake LeBaron International Business of learning which are present in most agent-based financial markets. First, passive learning refers to a form active and passive learning dynamics. I will define and argue that both these forms of learning

  18. Analysis of passive scalar advection in parallel shear flows: Sorting of modes at intermediate time scales

    E-Print Network [OSTI]

    Camassa, Roberto

    Analysis of passive scalar advection in parallel shear flows: Sorting of modes at intermediate time; published online 4 November 2010 The time evolution of a passive scalar advected by parallel shear flows. INTRODUCTION The advection-diffusion of a passive scalar is a pivotal problem in mathematical physics

  19. Scalable, Server-Passive, User-Anonymous Timed Release Public Key Encryption from Bilinear Pairing

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Scalable, Server-Passive, User-Anonymous Timed Release Public Key Encryption from Bilinear Pairing- able, server-passive and user-anonymous timed release public-key encryption scheme which allows precise in our scheme is completely passive -- no interaction between it and the sender or receiver is needed

  20. Passive trapped modes in the water wave problem for a floating structure

    E-Print Network [OSTI]

    Passive trapped modes in the water wave problem for a floating structure C. J. Fitzgerald and P. Mc. These "passive trapped modes" are such that the net force on the structure exerted by the fluid oscillation to float freely. In the paper, methods are given for the construction of passive trapping structures

  1. Passive Cryptanalysis of the UnConditionally Secure Authentication Protocol for RFID

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Passive Cryptanalysis of the UnConditionally Secure Authentication Protocol for RFID Systems(observing) about 90 runs of the protocol. Finding a nonce enables a passive attacker to recover all five secret. Key words: : RFID, Authentication Protocol, Passive Attack 1 Introduction As of today, RFID (Radio

  2. Combining Passive Haptics with Redirected Walking luv@cs.unc.edu

    E-Print Network [OSTI]

    Pollefeys, Marc

    Combining Passive Haptics with Redirected Walking Luv Kohli luv@cs.unc.edu Eric Burns burns of haptic feedback and constraints imposed by limited tracker space. Passive haptic feedback has been used introduce a method by which they can be combined to address both problems simultaneously. Key words: passive

  3. Understanding Passive and Active Service Discovery (Extended) ISI-TR-642, May 30, 2007

    E-Print Network [OSTI]

    Heidemann, John

    Understanding Passive and Active Service Discovery (Extended) ISI-TR-642, May 30, 2007 Genevieve and passive monitoring. Active probing finds all ser- vices currently on the network, except services administrative boundaries. Passive monitoring is typically much slower and can find transient services

  4. Active and passive fields face to face Antonio Celani1,5

    E-Print Network [OSTI]

    Cencini, Massimo

    Active and passive fields face to face Antonio Celani1,5 , Massimo Cencini2 , Andrea Mazzino3 of active and passive scalar fields transported by the same turbulent flow are investigated. Four examples is akin to that of its co- evolving passive counterpart. The two other cases indicate that this similarity

  5. Passive scalar evolution in peripheral regions V. V. Lebedev1,2

    E-Print Network [OSTI]

    Lebedev, Vladimir

    Passive scalar evolution in peripheral regions V. V. Lebedev1,2 and K. S. Turitsyn1 1 Landau the evolution of a passive scalar concentration of pollutants or temperature in a chaotic turbulent flow. A universal asymptotic behavior of the passive scalar decay homogenization related to peripheral regions near

  6. PASSIVE SENSOR IMAGING USING CROSS CORRELATIONS OF NOISY SIGNALS IN A SCATTERING MEDIUM

    E-Print Network [OSTI]

    Garnier, Josselin

    PASSIVE SENSOR IMAGING USING CROSS CORRELATIONS OF NOISY SIGNALS IN A SCATTERING MEDIUM JOSSELIN's function between two passive sensors can be estimated from the cross correlation of recorded signal source region. We extend this analysis to passive sensor imaging of reflectors with different ambient

  7. DETECTING PASSIVE EAVESDROPPERS IN THE MIMO WIRETAP CHANNEL Amitav Mukherjee and A. Lee Swindlehurst

    E-Print Network [OSTI]

    Swindlehurst, A. Lee

    DETECTING PASSIVE EAVESDROPPERS IN THE MIMO WIRETAP CHANNEL Amitav Mukherjee and A. Lee.mukherjee;swindle}@uci.edu ABSTRACT The MIMO wiretap channel comprises a passive eavesdropper that attempts to intercept antennas. In a dynamic network, it is imperative that the presence of a passive eavesdropper be determined

  8. On the Security of Non-Linear HB (NLHB) Protocol Against Passive Attack

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    On the Security of Non-Linear HB (NLHB) Protocol Against Passive Attack Mohammad Reza Sohizadeh against passive attacks, Madhavan et al. presented Non-Linear HB(NLHB) pro- tocol. In contrast to HB, NLHB relies on the complexity of decoding a class of non-linear codes to render the passive attacks proposed

  9. Passive spatial and temporal integration of excitatory synaptic inputs in cerebellar Purkinje cells of young rats

    E-Print Network [OSTI]

    Passive spatial and temporal integration of excitatory synaptic inputs in cerebellar Purkinje cells linearly independent of the spatial and temporal separation of inputs. Summation of inputs in a passive. Keywords: Dendritic integration; Parallel fiber; Excitation; Timing; Synchrony; Rat Based on a passive

  10. Passive margins getting squeezed in the mantle convection vice Philippe Yamato,1

    E-Print Network [OSTI]

    Becker, Thorsten W.

    Passive margins getting squeezed in the mantle convection vice Philippe Yamato,1 Laurent Husson,1 2013. [1] Passive margins often exhibit uplift, exhumation, and tectonic inversion. We speculate passive margins. In order to address this issue, we design a 2-D viscous numerical model wherein

  11. Passive scalar in a large-scale velocity field I. Kolokolov

    E-Print Network [OSTI]

    Lebedev, Vladimir

    Passive scalar in a large-scale velocity field I. Kolokolov Budker Institute of Nuclear Physics advection of a passive scalar (t,r) by an incompressible large-scale turbulent flow. In the framework of and for the passive scalar difference (r1) (r2) for separations r1 r2 lying in the convective interval are found

  12. Modeling of passive microwave responses in convective situations using output from mesoscale models

    E-Print Network [OSTI]

    Chaboureau, Jean-Pierre

    Modeling of passive microwave responses in convective situations using output from mesoscale models 2003; revised 27 January 2004; accepted 5 February 2004; published 30 March 2004. [1] Passive microwave, which essentially sense cloud tops. Therefore passive microwave observations are a very promising tool

  13. Context Passive gathering of information Experiments Integrated behavioral dvfs method Hydrasim Measuring and Characterizing HPC applications

    E-Print Network [OSTI]

    Lefèvre, Laurent

    Context Passive gathering of information Experiments Integrated behavioral dvfs method Hydrasim applications and CPU/GPU simulation #12;Context Passive gathering of information Experiments Integrated behavioral dvfs method Hydrasim Plan 1 Context 2 Passive gathering of information 3 Experiments 4 Integrated

  14. From Passive to Covert Security at Low Cost Ivan Damgard, Martin Geisler, and Jesper Buus Nielsen

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    From Passive to Covert Security at Low Cost Ivan Damgard, Martin Geisler, and Jesper Buus Nielsen to compile a passively secure protocol for honest majority into one that is secure against covert attacks categorized as being either semi-honest (passive) or malicious (ac- tive). A semi-honest adversary will only

  15. Model for passive mode locking in semiconductor lasers Andrei G. Vladimirov*

    E-Print Network [OSTI]

    Vladimirov, Andrei G.

    Model for passive mode locking in semiconductor lasers Andrei G. Vladimirov* Weierstrass Institute 11 May 2005; published 12 September 2005 We derive and study a model describing passive mode locking.65.Pc INTRODUCTION Passive mode locking ML is a powerful method to gen- erate high-quality short pulses

  16. Passive Tele-operation of Pneumatic Powered Robotic Rescue Crawler Proc. of 6th

    E-Print Network [OSTI]

    Li, Perry Y.

    Passive Tele-operation of Pneumatic Powered Robotic Rescue Crawler ________________________________________________________________________________________________________________________ Proc. of 6th FPNI-PhD Symp. West Lafayette 2010, pp. 451-466 451 PASSIVE TELE-OPERATION OF PNEUMATIC, a passive bilateral tele-operation of a pneumatic powered robotic crawler is presented. The crawler

  17. Active and passive social support in families of greylag geese (Anser anser)

    E-Print Network [OSTI]

    Richner, Heinz

    Active and passive social support in families of greylag geese (Anser anser) Isabella B.R. Scheiber ally in agonistic encounters, and (ii) `passive social support' in which the mere presence of a social to study support by social allies. We investigated the effects of active and passive social support in ten

  18. Passive film-induced stress and mechanical properties of a-Ti in methanol solution

    E-Print Network [OSTI]

    Volinsky, Alex A.

    Passive film-induced stress and mechanical properties of a-Ti in methanol solution Zhi Qin 2013 Accepted 7 October 2013 Available online 14 October 2013 Keywords: A. Titanium C. Passive films C. Stress corrosion C. Effects of strain C. Interfaces a b s t r a c t Passive films play an important role

  19. Three-dimensional scapulothoracic motion during active and passive arm elevation

    E-Print Network [OSTI]

    Karduna, Andrew

    Three-dimensional scapulothoracic motion during active and passive arm elevation D. David Ebaugh a (active versus passive arm elevation) on three-dimensional scapulothoracic motion. Methods. Twenty during active and passive arm elevation. Muscle activity was recorded from surface electrodes over

  20. Highly Integrated Millimeter-Wave Passive Components Using 3-D LTCC System-on-Package

    E-Print Network [OSTI]

    Tentzeris, Manos

    miniaturized easy-to-design passive circuits that can be used as critical building blocks for millimetre building blocks enabling a complete passive solution for compact, low cost wireless front-end modulesHighly Integrated Millimeter-Wave Passive Components Using 3-D LTCC System-on-Package (SOP

  1. LITHOSPHERE | | www.gsapubs.org Formation of passive-roof duplexes in the Colombian

    E-Print Network [OSTI]

    Bookhagen, Bodo

    with a passive-roof duplex on its hinterland side if surface mass transport is combined with efficient sedimentLITHOSPHERE | | www.gsapubs.org Formation of passive-roof duplexes in the Colombian SubandesSANTA BARBARA, 1832 ELLISON HALL, SANTA BARBARA, CALIFORNIA 93106-4060, USA ABSTRACT Passive-roof duplexes

  2. Spin switches for compact implementation of neuron and synapse

    SciTech Connect (OSTI)

    Quang Diep, Vinh, E-mail: vdiep@purdue.edu; Sutton, Brian; Datta, Supriyo [School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907 (United States); Behin-Aein, Behtash [GLOBALFOUNDRIES, Inc., Sunnyvale, California 94085 (United States)

    2014-06-02

    Nanomagnets driven by spin currents provide a natural implementation for a neuron and a synapse: currents allow convenient summation of multiple inputs, while the magnet provides the threshold function. The objective of this paper is to explore the possibility of a hardware neural network implementation using a spin switch (SS) as its basic building block. SS is a recently proposed device based on established technology with a transistor-like gain and input-output isolation. This allows neural networks to be constructed with purely passive interconnections without intervening clocks or amplifiers. The weights for the neural network are conveniently adjusted through analog voltages that can be stored in a non-volatile manner in an underlying CMOS layer using a floating gate low dropout voltage regulator. The operation of a multi-layer SS neural network designed for character recognition is demonstrated using a standard simulation model based on coupled Landau-Lifshitz-Gilbert equations, one for each magnet in the network.

  3. Constraining ultra large-scale cosmology with multiple tracers in optical and radio surveys

    E-Print Network [OSTI]

    Alonso, David

    2015-01-01

    Multiple tracers of the cosmic density field, with different bias, number and luminosity evolution, can be used to measure the large-scale properties of the Universe. We show how an optimal combination of tracers can be used to detect general-relativistic effects in the observed density of sources. We forecast for the detectability of these effects, as well as measurements of primordial non-Gaussianity and large-scale lensing magnification with current and upcoming large-scale structure experiments. In particular we quantify the significance of these detections in the short term with experiments such as the Dark Energy Survey (DES), and in the long term with the Large Synoptic Survey Telescope (LSST) and the Square Kilometre Array (SKA). We review the main observational challenges that must be overcome to carry out these measurements.

  4. Appraisal of transport and deformation in shale reservoirs using natural noble gas tracers

    SciTech Connect (OSTI)

    Heath, Jason E.; Kuhlman, Kristopher L.; Robinson, David G.; Bauer, Stephen J.; Gardner, William Payton

    2015-09-01

    This report presents efforts to develop the use of in situ naturally-occurring noble gas tracers to evaluate transport mechanisms and deformation in shale hydrocarbon reservoirs. Noble gases are promising as shale reservoir diagnostic tools due to their sensitivity of transport to: shale pore structure; phase partitioning between groundwater, liquid, and gaseous hydrocarbons; and deformation from hydraulic fracturing. Approximately 1.5-year time-series of wellhead fluid samples were collected from two hydraulically-fractured wells. The noble gas compositions and isotopes suggest a strong signature of atmospheric contribution to the noble gases that mix with deep, old reservoir fluids. Complex mixing and transport of fracturing fluid and reservoir fluids occurs during production. Real-time laboratory measurements were performed on triaxially-deforming shale samples to link deformation behavior, transport, and gas tracer signatures. Finally, we present improved methods for production forecasts that borrow statistical strength from production data of nearby wells to reduce uncertainty in the forecasts.

  5. Quantitative measurement of binary liquid distributions using multiple-tracer x-ray fluorescence and radiography

    SciTech Connect (OSTI)

    Halls, Benjamin R.; Meyer, Terrence R.; Kastengren, Alan L.

    2015-01-01

    The complex geometry and large index-of-refraction gradients that occur near the point of impingement of binary liquid jets present a challenging environment for optical interrogation. A simultaneous quadruple-tracer x-ray fluorescence and line-of-sight radiography technique is proposed as a means of distinguishing and quantifying individual liquid component distributions prior to, during, and after jet impact. Two different pairs of fluorescence tracers are seeded into each liquid stream to maximize their attenuation ratio for reabsorption correction and differentiation of the two fluids during mixing. This approach for instantaneous correction of x-ray fluorescence reabsorption is compared with a more time-intensive approach of using stereographic reconstruction of x-ray attenuation along multiple lines of sight. The proposed methodology addresses the need for a quantitative measurement technique capable of interrogating optically complex, near-field liquid distributions in many mixing systems of practical interest involving two or more liquid streams.

  6. Quantitative measurement of binary liquid distributions using multiple-tracer x-ray fluorescence and radiography

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Halls, Benjamin R.; Meyer, Terrence R.; Kastengren, Alan L.

    2015-01-23

    The complex geometry and large index-of-refraction gradients that occur near the point of impingement of binary liquid jets present a challenging environment for optical interrogation. A simultaneous quadruple-tracer x-ray fluorescence and line-of-sight radiography technique is proposed as a means of distinguishing and quantifying individual liquid component distributions prior to, during, and after jet impact. Two different pairs of fluorescence tracers are seeded into each liquid stream to maximize their attenuation ratio for reabsorption correction and differentiation of the two fluids during mixing. This approach for instantaneous correction of x-ray fluorescence reabsorption is compared with a more time-intensive approach of usingmorestereographic reconstruction of x-ray attenuation along multiple lines of sight. The proposed methodology addresses the need for a quantitative measurement technique capable of interrogating optically complex, near-field liquid distributions in many mixing systems of practical interest involving two or more liquid streams.less

  7. Flux Measurements of Volatile Organic Compounds from an Urban Tower Platform in Houston, Texas: Trends and Tracers

    E-Print Network [OSTI]

    Hale, Martin C

    2014-05-08

    and traffic counts except during variable working hours. To assign measured fluxes to local sources, we tested a bulk flux footprint model (Kormann and Meixner model) designed for uniform emission surface areas in this urban, heterogeneous landscape. Tracer...

  8. Thorium-234 as a tracer of spatial, temporal and vertical variability in particle flux in the North Pacific

    E-Print Network [OSTI]

    Siegel, David A.

    Thorium-234 as a tracer of spatial, temporal and vertical variability in particle flux in the North Available online 16 April 2009 Keywords: Thorium-234 Particle flux Sediment trap Scavenging North Pacific

  9. Integrated Approach to Use Natural Chemical and Isotopic Tracers to Estimate Fracture Spacing and Surface Area in EGS Systems

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. This objective of this project is to develop an innovative approach to estimate fracture surface area and spacing through interpretation of signals of natural chemical and isotopic tracers.

  10. A Modified Tracer-Gas-Concentration Decay Method for Ventilation Rate Measurements in Large, Long, and Narrow Spaces

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    obtained by the CO2-concentration decay method. However, this method requires a large amount of tracer method for ventilation rate measurements in large, long, and narrow spaces," Indoor and Built Environment

  11. Semianalytical Solutions of Radioactive or Reactive Tracer Transport in Layered Fractured Media

    SciTech Connect (OSTI)

    G.J. Moridis; G. S. Bodvarsson

    2001-10-01

    In this paper, semianalytical solutions are developed for the problem of transport of radioactive or reactive tracers (solutes or colloids) through a layered system of heterogeneous fractured media with misaligned fractures. The tracer transport equations in the matrix account for (a) diffusion, (b) surface diffusion (for solutes only), (c) mass transfer between the mobile and immobile water fractions, (d) linear kinetic or equilibrium physical, chemical, or combined solute sorption or colloid filtration, and (e) radioactive decay or first order chemical reactions. Any number of radioactive decay daughter products (or products of a linear, first-order reaction chain) can be tracked. The tracer-transport equations in the fractures account for the same processes, in addition to advection and hydrodynamic dispersion. Additionally, the colloid transport equations account for straining and velocity adjustments related to the colloidal size. The solutions, which are analytical in the Laplace space, are numerically inverted to provide the solution in time and can accommodate any number of fractured and/or porous layers. The solutions are verified using analytical solutions for limiting cases of solute and colloid transport through fractured and porous media. The effect of important parameters on the transport of {sup 3}H, {sup 237}Np and {sup 239}Pu (and its daughters) is investigated in several test problems involving layered geological systems of varying complexity. {sup 239}Pu colloid transport problems in multilayered systems indicate significant colloid accumulations at straining interfaces but much faster transport of the colloid than the corresponding strongly sorbing solute species.

  12. Beyond-Design-Basis-Accidents Passive Containment-Cooling Spray System

    SciTech Connect (OSTI)

    Karameldin, Aly; Temraz, Hassan M. Elsawy; Ibrahim, Nady Attia [Atomic Energy Authority (Egypt)

    2001-10-15

    The proposed safety feature considered in this study aims to increase the safety margins of nuclear power plants by proposed water tanks located inside or outside the upper zone of the containment to be utilized for (a) residual heat removal of the reactor in case of station blackout or in case of normal reactor shutdown and (b) beyond-design-basis accidents, in which core melt and debris-concrete interaction take place, associated with accumulative containment pressure increase and partial loss of the active systems. The proposed passive containment system can be implemented by a special mechanism, which can allow the pressurization of the water in the tanks and therefore can enable an additional spray system to start in case of increasing the containment pressure over a certain value just below the design pressure. A conservative case study is that of a Westinghouse 3411-MW(thermal) power station, where the proposed passive containment cooling spray system (PCCSS) will start at a pressure of 6 bars and terminate at a pressure of 3 bars. A one-dimensional lumped model is postulated to describe the thermal and hydraulic process behavior inside the containment after a beyond-design-basis accident. The considered parameters are the spray mass flow rate, the initial droplet diameters, fuel-cooling time, and the ultimate containment pressure. The overall heat and mass balance inside the containment are carried out, during both the containment depressurization (by the spraying system) and pressurization (by the residual energies). The results show that the design of the PCCSS is viable and has a capability to maintain the containment below the design pressure passively for the required grace period of 72 h. Design curves of the proposed PCCSS indicate the effect of the spray flow rate and cooling time on the total sprayed volume during the grace period of 72 h. From these curves it can be concluded that for the grace period of 72 h, the required tank volumes are 3800 and 4700 m{sup 3}, corresponding to fuel-cooling times (time after shutdown) of two weeks and one week, respectively. This large quantity of water serves as an ultimate heat sink available for the residual heat removal in the case of station blackout. The optimal spraying droplet diameter, travel, and mass flow rate are 3 mm, 30 m, and 100 to 125 kg/s, respectively.

  13. Plans, Implementation, and Results

    Broader source: Energy.gov [DOE]

    The Bioenergy Technologies Office carries out technology research, development, and deployment through an ongoing process of planning and analysis, implementation, and review. This Web page includes links to documents that support and document the program management process, and the results and public benefits that derive from it.

  14. Transition Implementation Guide

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2001-04-24

    This Guide was prepared to aid in the development, planning, and implementation of requirements and activities during the transition phase at Department of Energy (DOE) facilities that have been declared or are forecast to become excess to any future mission requirements.

  15. Research & Technology Implementation

    E-Print Network [OSTI]

    Azevedo, Ricardo

    Research & Technology Implementation TxDOT RTI OFFICE #12;REVIEW OF ADMINISTRATIVE REQUIREMENTS of Instructions from RFP Message2 Administrative Components of a Proposal3 RTI Templates & Forms for Universities4 the current forms sent with the RFP. The RTI goal is to acknowledge receipt of your Project Agreement within

  16. Implementing the Interplanetary Internet

    E-Print Network [OSTI]

    Wood, Lloyd

    Implementing the Interplanetary Internet differing approaches Lloyd Wood Surrey Space Centre guest lecture Tuesday 17 February 2009. #12;22Interplanetary Internet Lloyd Wood How did it all begin?How did Internet Lloyd Wood VintVintVintVint sets up an Internet Society SIGsets up an Internet Society SIGsets

  17. Heat as a Tracer to Examine Hydraulic Conductance Near the RussianRiver Bank Filtration Facility, Sonoma County, CA

    SciTech Connect (OSTI)

    Constantz, Jim; Su, Grace; Hatch, Christine

    2004-08-01

    Both the measurement of temperature and the simulation of heat and water transport have benefited from significant recent advances in data acquisition and computer resources. This has afforded the opportunity for routine use of heat as a tracer in a variety of hydrological regimes. Heat is particularly well suited for investigations of stream/groundwater exchanges. Dynamic temperature patterns between the stream and underlying sediments are typical, due to large stream surface area to volume ratios relative to other surface water bodies. Heat is a naturally occurring tracer, free from (real or perceived) issues of contamination associated with use of chemical tracers in stream environments. The use of heat as a tracer relies on the measurement of temperature gradients, and temperature is an extremely robust parameter to monitor. Temperature data is immediately available as opposed to chemical tracers, which often require significant laboratory analysis. In this work, we report on the progress in the use of heat as a tracer to determine the hydraulic conductance of the streambed along the middle reaches of the Russian River, located west of Santa Rosa, CA. The general hydrological setting is described and the unique matter in which the water resources are managed in an environment of increasing population, a rapid shift to agricultural crops requiring more irrigation, and a series of fishery related mandates.

  18. Effect of Hydrogen Passivation on the Electronic Structure of Ionic Semiconductor Nanostructures

    SciTech Connect (OSTI)

    Deng, H. X.; Li, S. S.; Li, J. B.; Wei, S. H.

    2012-05-15

    In theoretical studies of thin film and nanostructured semiconductors, pseudohydrogen (PH) is widely used to passivate the surface dangling bonds. Based on these calculations, it is often believed that nanostructured semiconductors, due to quantum confinement, have a larger band gap than their bulk counterparts. Using first-principles band structure theory calculation and comparing systematically the differences between PH-passivated and real-hydrogen-passivated (RH-passivated) semiconductor surfaces and nanocrystals, we show that, unlike PH passivation that always increases the band gap with respect to the bulk value, RH passivation of the nanostructured semiconductors can either increase or decrease the band gap, depending on the ionicity of the nanocompounds. The differences between PH and RH passivations decreases when the covalency of the semiconductor increases and can be explained using a band coupling model. This observation greatly increases the tunability of nanostructured semiconductor properties, especially for wide-gap ionic semiconductors.

  19. Solution-processed amorphous silicon surface passivation layers

    SciTech Connect (OSTI)

    Mews, Mathias Sontheimer, Tobias; Korte, Lars; Rech, Bernd; Mader, Christoph; Traut, Stephan; Wunnicke, Odo

    2014-09-22

    Amorphous silicon thin films, fabricated by thermal conversion of neopentasilane, were used to passivate crystalline silicon surfaces. The conversion is investigated using X-ray and constant-final-state-yield photoelectron spectroscopy, and minority charge carrier lifetime spectroscopy. Liquid processed amorphous silicon exhibits high Urbach energies from 90 to 120?meV and 200?meV lower optical band gaps than material prepared by plasma enhanced chemical vapor deposition. Applying a hydrogen plasma treatment, a minority charge carrier lifetime of 1.37?ms at an injection level of 10{sup 15}/cm{sup 3} enabling an implied open circuit voltage of 724?mV was achieved, demonstrating excellent silicon surface passivation.

  20. Comprehensive figures of merit for passive and active plasmonic circuits

    E-Print Network [OSTI]

    Krasavin, Alexey V

    2015-01-01

    In this article a comprehensive figures of merit for both passive and active plasmonic circuit components are introduced, benchmarking their performance for the realisation of high-bandwidth optical data communication in electronic chips. For the first time the figure of merit for passive plasmonic interconnects has been derived in terms of ultimate global characteristics of the plasmonic circuitry, particularly bandwidth and power consumption densities. Then, these parameters were linked to the local waveguide characteristics, such as mode propagation length, bending radius, etc. The figure has been applied to provide a comprehensive comparison to the main types of the plasmonics waveguides and can serve as an excellent benchmark for future designs. Completing the development of broadband optical on-chip data communication, we developed an all-inclusive figure of merit for active photonic- or plasmonic-based electro-optic modulators, establishing the communication between electronic and photonic chip domains...

  1. Nonequilibrium Glass Transition in Mixtures of Active-Passive Particles

    E-Print Network [OSTI]

    Huai Ding; Mengkai Feng; Huijun Jiang; Zhonghuai Hou

    2015-06-09

    We develop a mode coupling theory(MCT) to study the nonequilibrium glass transition behavior of a mono-disperse mixture of active-passive hard-sphere particles. The MCT equations clearly demonstrate that the glass transition is shifted to higher values of total volume fraction when doping a passive system with active particles. Interestingly, we find that the glass transition point may show a non-monotonic dependence on the effective diffusivity of the active component, indicating a nontrivial type of activity induced reentrance behavior. Analysis based on the nonergodic parameters suggest that the glassy state at small activity is due to the caging effect, while that at high activity could result from activity induced dynamic clustering.

  2. Phase segregation of passive advective particles in an active medium

    E-Print Network [OSTI]

    Amit Das; Anirban Polley; Madan Rao

    2015-06-23

    Localized contractile configurations or asters spontaneously appear and disappear as emergent structures in the collective stochastic dynamics of active polar actomyosin filaments. Passive parti- cles which (un)bind to the active filaments get advected into the asters, forming transient clusters. We study the phase segregation of such passive advective scalars in a medium of dynamic asters, as a function of the aster density and the ratio of the rates of aster remodeling to particle diffusion. The dynamics of coarsening shows strong violation of Porod behaviour, suggesting diffuse interfaces. The phase segregated steady state shows strongly fluctuations characterized by multiscaling and in- termittency. We expect these unique nonequilibrium features to manifest in the actin-dependent molecular clustering at the cell surface.

  3. Passive hybrid sensing tag with flexible substrate saw device

    DOE Patents [OSTI]

    Skinner, Jack L.; Chu, Eric Y.; Ho, Harvey

    2012-12-25

    The integration of surface acoustic wave (SAW) filters, microfabricated transmission lines, and sensors onto polymer substrates in order to enable a passive wireless sensor platform is described herein. Incident microwave pulses on an integrated antenna are converted to an acoustic wave via a SAW filter and transmitted to an impedance based sensor, which for this work is a photodiode. Changes in the sensor state induce a corresponding change in the impedance of the sensor resulting in a reflectance profile. Data collected at a calibrated receiver is used to infer the state of the sensor. Based on this principal, light levels were passively and wirelessly demonstrated to be sensed at distances of up to about 12 feet.

  4. Passive heat-transfer means for nuclear reactors. [LMFBR

    DOE Patents [OSTI]

    Burelbach, J.P.

    1982-06-10

    An improved passive cooling arrangement is disclosed for maintaining adjacent or related components of a nuclear reactor within specified temperature differences. Specifically, heat pipes are operatively interposed between the components, with the vaporizing section of the heat pipe proximate the hot component operable to cool it and the primary condensing section of the heat pipe proximate the other and cooler component operable to heat it. Each heat pipe further has a secondary condensing section that is located outwardly beyond the reactor confinement and in a secondary heat sink, such as air ambient the containment, that is cooler than the other reactor component. By having many such heat pipes, an emergency passive cooling system is defined that is operative without electrical power.

  5. Nonequilibrium Glass Transition in Mixtures of Active-Passive Particles

    E-Print Network [OSTI]

    Ding, Huai; Jiang, Huijun; Hou, Zhonghuai

    2015-01-01

    We develop a mode coupling theory(MCT) to study the nonequilibrium glass transition behavior of a mono-disperse mixture of active-passive hard-sphere particles. The MCT equations clearly demonstrate that the glass transition is shifted to higher values of total volume fraction when doping a passive system with active particles. Interestingly, we find that the glass transition point may show a non-monotonic dependence on the effective diffusivity of the active component, indicating a nontrivial type of activity induced reentrance behavior. Analysis based on the nonergodic parameters suggest that the glassy state at small activity is due to the caging effect, while that at high activity could result from activity induced dynamic clustering.

  6. 100-NR-2 Apatite Treatability Test: Fall 2010 Tracer Infiltration Test (White Paper)

    SciTech Connect (OSTI)

    Vermeul, Vincent R.; Fritz, Brad G.; Fruchter, Jonathan S.; Greenwood, William J.; Johnson, Timothy C.; Horner, Jacob A.; Strickland, Christopher E.; Szecsody, James E.; Williams, Mark D.

    2011-04-14

    The primary objectives of the tracer infiltration test were to 1) determine whether field-scale hydraulic properties for the compacted roadbed materials and underlying Hanford fm. sediments comprising the zone of water table fluctuation beneath the site are consistent with estimates based laboratory-scale measurements on core samples and 2) characterize wetting front advancement and distribution of soil moisture achieved for the selected application rate. These primary objectives were met. The test successfully demonstrated that 1) the remaining 2 to 3 ft of compacted roadbed material below the infiltration gallery does not limit infiltration rates to levels that would be expected to eliminate near surface application as a viable amendment delivery approach and 2) the combined aqueous and geophysical monitoring approaches employed at this site, with some operational adjustments based on lessons learned, provides an effective means of assessing wetting front advancement and the distribution of soil moisture achieved for a given solution application. Reasonably good agreement between predicted and observed tracer and moisture front advancement rates was observed. During the first tracer infiltration test, which used a solution application rate of 0.7 cm/hr, tracer arrivals were observed at the water table (10 to 12 ft below the bottom of the infiltration gallery) after approximately 5 days, for an advancement rate of approximately 2 ft/day. This advancement rate is generally consistent with pre-test modeling results that predicted tracer arrival at the water table after approximately 5 days (see Figure 8, bottom left panel). This agreement indicates that hydraulic property values specified in the model for the compacted roadbed materials and underlying Hanford formation sediments, which were based on laboratory-scale measurements, are reasonable estimates of actual field-scale conditions. Additional work is needed to develop a working relationship between resistivity change and the associated change in moisture content so that 4D images of moisture content change can be generated. Results from this field test will be available for any future Ca-citrate-PO4 amendment infiltration tests, which would be designed to evaluate the efficacy of using near surface application of amendments to form apatite mineral phases in the upper portion of the zone of water table fluctuation.

  7. Implementing Advances in Transport Security Technologies | Department...

    Office of Environmental Management (EM)

    Implementing Advances in Transport Security Technologies Implementing Advances in Transport Security Technologies Implementing Advances in Transport Security Technologies More...

  8. Passive Tamper Indicating Enclosures Incorporating Embedded Optical Fibre

    SciTech Connect (OSTI)

    Wynn, Paul; White, Helen; Allen, Keir; Simmons, Kevin L.; Sliva, Paul; Benz, Jacob M.; Tanner, Jennifer E.

    2011-08-14

    AWE and PNNL are engaged in a technical collaboration investigating techniques to enhance continuity of knowledge over Accountable Items within a verified nuclear weapons dismantlement process. Tamper Indicating Enclosures (TIE) will likely be deployed as part of a chain of custody regime to indicate an unauthorised attempt to access an Accountable Item. This paper looks at the use of passive TIEs incorporating embedded optical fibre; concepts relating to deployment, tamper indication and unique identification will be discussed.

  9. Evaluating the performance of passive-solar-heated buildings

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1983-01-01

    Methods of evaluating the thermal performance of passive-solar buildings are reviewed. Instrumentation and data logging requirements are outlined. Various methodologies that have been used to develop an energy balance for the building and various performance measures are discussed. Methods for quantifying comfort are described. Subsystem and other special-purpose monitoring are briefly reviewed. Summary results are given for 38 buildings that have been monitored.

  10. Heat storage and distribution inside passive-solar buildings

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1983-05-01

    Passive solar buildings are investigated from the viewpoint of the storage of solar heat in materials of the building: walls, floors, ceilings, and furniture. The effects of the location, material, thickness, and orientation of each internal building surface are investigated. The concept of diurnal heat capacity is introduced and a method of using this parameter to estimate clear-day temperature swings is developed. Convective coupling to remote rooms within a building is discussed. Design guidelines are given.

  11. Tips: Passive Solar Heating and Cooling | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data CenterFinancialInvestingRenewableTeach and Learn5 BudgetHistoryPassive

  12. Prognostics Health Management for Advanced Small Modular Reactor Passive Components

    SciTech Connect (OSTI)

    Meyer, Ryan M.; Ramuhalli, Pradeep; Coble, Jamie B.; Mitchell, Mark R.; Wootan, David W.; Hirt, Evelyn H.; Berglin, Eric J.; Bond, Leonard J.; Henager, Charles H.

    2013-10-18

    In the United States, sustainable nuclear power to promote energy security is a key national energy priority. Advanced small modular reactors (AdvSMR), which are based on modularization of advanced reactor concepts using non-light-water reactor (LWR) coolants such as liquid metal, helium, or liquid salt may provide a longer-term alternative to more conventional LWR-based concepts. The economics of AdvSMRs will be impacted by the reduced economy-of-scale savings when compared to traditional LWRs and the controllable day-to-day costs of AdvSMRs are expected to be dominated by operations and maintenance costs. Therefore, achieving the full benefits of AdvSMR deployment requires a new paradigm for plant design and management. In this context, prognostic health management of passive components in AdvSMRs can play a key role in enabling the economic deployment of AdvSMRs. In this paper, the background of AdvSMRs is discussed from which requirements for PHM systems are derived. The particle filter technique is proposed as a prognostics framework for AdvSMR passive components and the suitability of the particle filter technique is illustrated by using it to forecast thermal creep degradation using a physics-of-failure model and based on a combination of types of measurements conceived for passive AdvSMR components.

  13. Passive and low energy research and development: a global view

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1984-01-01

    Passive and low energy applications in buildings have become a topic of worldwide interest within the last few years. It has now been demonstrated very clearly that indoor comfort can be maintained with an expenditure of only 10 to 20% of the energy often required by modern buildings. This is accomplished through a combination of conservation measures to minimize the load, passive use of solar energy for heating, natural cooling, and daylighting. The major research emphasis has been on devising mathematical models to characterize heat flow within buildings, on the validation of these models by comparison with test results, and on the subsequent use of the models to investigate the influence of both design parameters and weather on system performance. Design guidelines have been developed, and simplified methods of analysis have been promulgated. Performance has been monitored in test modules, test buildings, and many residential and commercial buildings. The results both confirm good performance and establish the accuracy of model predictions. A significant change in the research picture has been seen in the last 4 years; whereas the major effort was originally in the United States, research is now being conducted in many countries throughout the world as many people have realized that passive and low energy methods are appropriate in virtually every climate and are well suited to economic, convenient, and reliable building construction and operation.

  14. Passive solar heated energy conserving biosphere home. Final report

    SciTech Connect (OSTI)

    Piekarski, R.

    1985-01-01

    ''Warm Gold'' is an original design of a passive solar heated energy conserving biosphere home. It has been owner-built with financial help from the US Department of Energy through its Appropriate Technology Small Grants Program of 1980. The home incorporates the six major components of passive solar design: appropriate geometry and orientation, glazing, light levels and reflective surfaces, ventilation, thermal storage, and insulation. Warm Gold is an earth-sheltered home with earth cover on the roof as well as on the two opaque north leg walls. It is of durable and efficient masonry construction which included stone masonry with on-site materials and cement block and ready mix concrete. Excavation, backfill, and drainage were necessary aspects of earth sheltered construction together with the all-important Bentonite waterproofing system. Warm Gold is a house which meets all the national building code standards of HUD. The home has two bedrooms, one bathroom, living room, dining room-kitchen, greenhouse, and utility annex, all of which are incorporated with the earth-sheltered, passive solar systems to be a comfortable, energy-efficient living environment.

  15. Passive film formation on 316L stainless steel

    SciTech Connect (OSTI)

    Lee, S.; Pitt, C.H.; Wadsworth, M.E.

    1981-10-01

    The polarization behavior of 316L stainless steel has been studied in deaerated sodium sulfate solutions of various pH values. Potentiodynamic, potentiostatic and galvanostatic methods were used for a kinetic study of the formation and growth of passive films. For the film composition analysis, Auger Electron Spectroscopy (AES) and ESCA techniques were also employed. Anodic polarization curves show that current increases as pH decreases and temperature increases. The activation energy for the reaction in the active region was determined to be 10.8 Kcal/mole. From potentiostatic experiments, three stages for passive film formation were observed: the initial active-passive transition, the logarithmic growth of the film and the parabolic growth of the film. The logarithmic relation is expressed and the parabolic relation written. The depth profile concentration of elements in the film by AES showed chromium enrichment at the surface except for the specimen treated at 0.9V (SCE), where iron was the dominant element in the film. The relative amount of Fe/sup 2 +/ and Fe/sup 3 +/ on the film surface analyzed by ESCA was not different for specimens anodized at 0.18V and 0.58V.

  16. CMR Shuffler System: Passive Mode Calibration and Certification Report

    SciTech Connect (OSTI)

    Frame, Katherine C. [Los Alamos National Laboratory; Gomez, Cipriano D. [Retired CMR-OPS: OPERATIONS; Salazar, William R. [Los Alamos National Laboratory; Mayo, Douglas R. [Los Alamos National Laboratory; Vigil, Georgiana M. [Los Alamos National Laboratory; Crooks, William J. [Los Alamos National Laboratory; Stange, Sy [Los Alamos National Laboratory

    2012-07-20

    Los Alamos National Laboratory has a number of spherical confinement vessels (CVs) remaining from tests involving nuclear materials. These vessels have an inner diameter of 6 feet with 1 to 2 inch thick steel walls. The goal of the Confinement Vessel Disposition (CVD) project is to remove debris and reduce contamination inside the vessels. As debris is removed from the vessels, material will be placed in waste drums. Far-field gamma ray assay will be used to determine when a drum is nearing a {sup 239}Pu equivalent mass of less than 200 g. The drum will then be assayed using a waste drum shuffler operated in passive mode using a neutron coincidence counting method for accountability. This report focuses on the testing and calibration of the CMR waste drum shuffler in passive mode operation. Initial testing was performed to confirm previously accepted measurement parameters. The system was then calibrated using a set of weapons grade Pu (WGPu, {sup 239}Pu > 93%) oxide standards placed inside a 55 gallon drum. The calibration data ranges from Pu mass of 0.5 g to 188.9 g. The CMR waste drum shuffler has been tested and calibrated in passive mode in preparation for safeguards accountability measurements of waste drums containing material removed from CVs for the CVD project.

  17. Filtering a statistically exactly solvable test model for turbulent tracers from partial observations

    E-Print Network [OSTI]

    Majda, Andrew J.

    as climate change problems concerning the transport of greenhouse gases such as carbon dioxide with strongly observations B. Gershgorin , A.J. Majda Department of Mathematics and Center for Atmosphere and Ocean Science Nonlinear Kalman filter Data assimilation a b s t r a c t A statistically exactly solvable model for passive

  18. Semi-Passive Replication in the Presence of Byzantine Faults HariGovind V. Ramasamy Adnan Agbaria William H. Sanders

    E-Print Network [OSTI]

    Sanders, William H.

    Semi-Passive Replication in the Presence of Byzantine Faults HariGovind V. Ramasamy Adnan Agbaria {ramasamy, adnan, whs}@crhc.uiuc.edu Abstract Semi-passive replication is a variant of passive replication that does not rely on a group membership service. D´efago et al. [4] defined the semi-passive replication

  19. 978-1-4244-1674-5/08 /$25.00 2008 IEEE CIS 2008 Propagation Modeling of Passive Worms

    E-Print Network [OSTI]

    Tokarchuk, Laurissa

    978-1-4244-1674-5/08 /$25.00 ©2008 IEEE CIS 2008 Propagation Modeling of Passive Worms in P2P with the study of active worm propagation, passive worm propagation has been less highlighted. Passive worms propagate slowly in Internet, but P2P system can be a potential vehicle to fast the propagation of passive

  20. 238 IEEE ELECTRON DEVICE LETTERS, VOL. 25, NO. 5, MAY 2004 Polyimide Passivated AlGaNGaN HFETs With

    E-Print Network [OSTI]

    Shen, Shyh-Chiang

    238 IEEE ELECTRON DEVICE LETTERS, VOL. 25, NO. 5, MAY 2004 Polyimide Passivated AlGaNGaN HFETs, degrading RF performance. A passivation scheme utilizing a polyimide film as the passivating layer. This data suggests that polyimide can be an effective passivation film for reducing surface states. Index

  1. Implementation of Sustainability at

    E-Print Network [OSTI]

    Johansen, Tom Henning

    0 Assessing Implementation of Sustainability at UiO Grnt UiO S u s t a i n a b i l i t y i n R e sustainability commitment among universities and proposed Best Green University Practices in 2010. It presents the current status of UiO Environmental Sustainability. #12;1 If you cannot measure it, you cannot manage it

  2. Use of DRACS to Enhance HTGRs Passive Safety and Economy

    SciTech Connect (OSTI)

    Haihua Zhao; Hongbin Zhang; Ling Zou

    2011-06-01

    This paper discusses the use of DRACS to Enhance HTGRs Passive Safety and Economy. One of the important requirements for Gen. IV High Temperature Gas Cooled Reactors (HTGR) is passive safety. Currently all the HTGR designs use Reactor Vessel Auxiliary Cooling System (RVACS) for passive decay heat removal. [1] The decay heat first is transferred to core barrel by conduction and radiation, and then to reactor vessel by thermal radiation and convection; finally the decay heat is transferred to natural circulated air or water systems. RVACS can be characterized as a surface based decay heat removal system. Similar concepts have been widely used in sodium cooled fast reactor (SFR) designs, advanced light water reactors like AP1000. The RVACS is especially suitable for smaller power reactors since small systems have relatively larger surface area. RVACS tends to be less expensive. However, it limits the largest achievable power level for modular HTGRs due to the mismatch between the reactor power (proportional to volume) and decay heat removal capability (proportional to surface). When the relative decay heat removal capability is reduced, the peak fuel temperature increases, even close to the design limit. Annual designs with internal reflector can mitigate this effect therefore further increase the power. Another way to increase power is to increase power density. However, it is also limited by the decay heat removal capability. Besides safety, HTGRs also need to be economical in order to compete with other reactor designs. The limit of decay heat removal capability set by using RVACS has affected the economy of HTGRs. Forsberg [2] pointed out other disadvantages of using RVACS such as conflicting functional requirements for the reactor vessel and scaling distortion for integral effect test of the system performance. A potential alternative solution is to use a volume based passive decay removal system, call Direct Reactor Auxiliary Cooling Systems (DRACS), to remove or mitigate the limitation on decay heat removal capability. DRACS has been widely used in SFR designs and in liquid salt cooled high temperature reactors. The containment cooling system in BWR is another example of volume based decay removal systems. DRACS composes of natural circulation loops with two sets of heat exchangers, one in reactor side and another is in environment side. DRACS has the benefits of increasing the power as needed (scalability) and modularity. This paper introduces the concept of using DRACS to enhance HTGRs passive safety and economy.

  3. Using {sup 222}Rn as a tracer of geophysical processes in underground environments

    SciTech Connect (OSTI)

    Lacerda, T.; Anjos, R. M.; Silva, A. A. R. da; Yoshimura, E. M.

    2014-11-11

    Radon levels in two old mines in San Luis, Argentina, are reported and analyzed. These mines are today used for touristic visitation. Our goal was to assess the potential use of such radioactive noble gas as tracer of geological processes in underground environments. CR-39 nuclear track detectors were used during the winter and summer seasons. The findings show that the significant radon concentrations reported in this environment are subject to large seasonal modulations, due to the strong dependence of natural ventilation on the variations of outside temperature. The results also indicate that radon pattern distribution appear as a good method to localize unknown ducts, fissures or secondary tunnels in subterranean environments.

  4. Analysis of volatile phase transport in soils using natural radon gas as a tracer

    SciTech Connect (OSTI)

    Chen, C.; Thomas, D.M.

    1992-12-31

    We have conducted a field study of soil gas transport processes using radon gas as a naturally occurring tracer. The .experiment monitored soil gas radon activity, soil moisture, and soil temperature at three depths in the shallow soil column; barometric pressure, rainfall and wind speed were monitored at the soil surface. Linear and multiple regression analysis of the data sets has shown that the gas phase radon activities under natural environmental conditions are influenced by soil moisture content, barometric pressure variations, soil temperature and soil structure. The effect of wind speed on subsurface radon activities under our field conditions has not been demonstrated.

  5. Analysis of volatile phase transport in soils using natural radon gas as a tracer

    SciTech Connect (OSTI)

    Chen, C.; Thomas, D.M.

    1992-01-01

    We have conducted a field study of soil gas transport processes using radon gas as a naturally occurring tracer. The .experiment monitored soil gas radon activity, soil moisture, and soil temperature at three depths in the shallow soil column; barometric pressure, rainfall and wind speed were monitored at the soil surface. Linear and multiple regression analysis of the data sets has shown that the gas phase radon activities under natural environmental conditions are influenced by soil moisture content, barometric pressure variations, soil temperature and soil structure. The effect of wind speed on subsurface radon activities under our field conditions has not been demonstrated.

  6. Passive cooling system for top entry liquid metal cooled nuclear reactors

    DOE Patents [OSTI]

    Boardman, Charles E. (Saratoga, CA); Hunsbedt, Anstein (Los Gatos, CA); Hui, Marvin M. (Cupertino, CA)

    1992-01-01

    A liquid metal cooled nuclear fission reactor plant having a top entry loop joined satellite assembly with a passive auxiliary safety cooling system for removing residual heat resulting from fuel decay during shutdown, or heat produced during a mishap. This satellite type reactor plant is enhanced by a backup or secondary passive safety cooling system which augments the primary passive auxiliary cooling system when in operation, and replaces the primary cooling system when rendered inoperative.

  7. Passive cooling system for liquid metal cooled nuclear reactors with backup coolant flow path

    DOE Patents [OSTI]

    Hunsbedt, Anstein (Los Gatos, CA); Boardman, Charles E. (Saratoga, CA)

    1993-01-01

    A liquid metal cooled nuclear fission reactor plant having a passive auxiliary safety cooling system for removing residual heat resulting from fuel decay during reactor shutdown, or heat produced during a mishap. This reactor plant is enhanced by a backup or secondary passive safety cooling system which augments the primary passive auxiliary cooling system when in operation, and replaces the primary system when rendered inoperable.

  8. Double dielectric passivation layer on InAs

    E-Print Network [OSTI]

    Egley, James Lee

    1985-01-01

    quality and the dielectric layer of an InAs sample with an anodic oxide/SiOz passivation layer. KOH was the electrolyte used for anodization and the SiOz was deposited by RF sputtering. The equipment that was built for testing of the samples at 77K... is briefly described. The processing steps required for the fabrication of a MOSFET and a mobility measurement device utilizing an anodic oxide/SisNq dielectric layer are explained. The anodic oxides grown here are shown to be semiconductors. Methods...

  9. Erbium-based magnetic refrigerant (regenerator) for passive cryocooler

    DOE Patents [OSTI]

    Gschneidner, Jr., Karl A. (Ames, IA); Pecharsky, Vitalij K. (Ames, IA)

    1996-07-23

    A two stage Gifford-McMahon cryocooler having a low temperature stage for reaching approximately 10K, wherein the low temperature stage includes a passive magnetic heat regenerator selected from the group consisting of Er.sub.6 Ni.sub.2 Sn, Er.sub.6 Ni.sub.2 Pb, Er.sub.6 Ni.sub.2 (Sn.sub.0.75 Ga.sub.0.25), and Er.sub.9 Ni.sub.3 Sn comprising a mixture of Er.sub.3 Ni and Er.sub.6 Ni.sub.2 Sn in the microstructure.

  10. Large Spin Entangled Current from a Passive Device

    E-Print Network [OSTI]

    Avinash Kolli; Simon C. Benjamin; Jose Garcia Coello; Sougato Bose; Brendon W. Lovett

    2008-08-25

    We show that a large entangled current can be produced from a very simple passive device: a cluster of three resonant quantum dots, tunnel coupled to one input lead and two output leads. The device can function in a `clean' mode, when almost all emitted electrons are paired in Bell states, or a `dirty' mode with a far higher emission rate but a significant portion of non-entangled electrons. Subsequent charge detection can enhance performance by identifying the pairs that are most likely to be entangled. The device is robust to specific choice of system parameters and therefore lends itself to immediate experimental demonstration. Applications include quantum repeaters and unconditionally secure interfaces.

  11. Passive states optimize the output of bosonic Gaussian quantum channels

    E-Print Network [OSTI]

    Giacomo De Palma; Dario Trevisan; Vittorio Giovannetti

    2015-11-01

    An ordering between the quantum states emerging from a single mode gauge-covariant bosonic Gaussian channel is proven. Specifically, we show that within the set of input density matrices with the same given spectrum, the element passive with respect to the Fock basis (i.e. diagonal with decreasing eigenvalues) produces an output which majorizes all the other outputs emerging from the same set. When applied to pure input states, our finding includes as a special case the result of A. Mari, et al., Nat. Comm. 5, 3826 (2014) which implies that the output associated to the vacuum majorizes the others.

  12. Passive Exposure to Mobile Phones: Enhancement of Intensity by Reflection

    E-Print Network [OSTI]

    Tsuyoshi Hondou; Takenori Ueda; Yasuhiro Sakata; Nobuto Tanigawa; Tetsu Suzuki; Taizo Kobayashi; Kensuke Ikeda

    2007-03-12

    In a recent Letter [J. Phys. Soc. Jpn. 71, 432 (2002)], we reported a preliminary calculation and concluded that public exposure to mobile phones can be enhanced by microwave reflection in public spaces. In this paper, we confirm the significance of microwave reflection reported in our previous Letter by experimental and numerical studies. Furthermore, we show that "hot spots" often emerge in reflective areas, where the local exposure level is much higher than average. Such places include elevators, and we discuss other possible environments including trains, buses, cars, and airplanes. Our results indicate the risk of "passive exposure" to microwaves.

  13. Natural air motion and stratification in passive buildings

    SciTech Connect (OSTI)

    Balcomb, J.D.; Jones, G.F.; Yamaguchi, Kenjiro

    1984-01-01

    Natural convection is a major mechanism for heat distribution in many passive solar buildings, especially those with sunspaces. To better understand this mechanism, observations of air velocities and temperatures have been made in 13 different houses that encompass a wide variety of one- and two-story geometries. This paper extends previous reports. Results from one house are described in detail, and some generalizations are drawn from the large additional mass of data taken. A simple mathematical model is presented that describes the general nature of airflow and energy flow through an aperture.

  14. Heat storage and distribution inside passive-solar buildings

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1983-01-01

    Passive-solar buildings are investigated from the viewpoint of the storage of solar heat in materials of the building: walls, floors, ceilings, and furniture. The effects of the location, material, thickness, and orientation of each internal building surface are investigated. The concept of diurnal heat capacity is introduced and a method of using this parameter to estimate clear-day temperature swings is developed. Convective coupling to remote rooms within a building is discussed, including both convection through single doorways and convective loops that may exist involving a sunspace. Design guidelines are given.

  15. Erbium-based magnetic refrigerant (regenerator) for passive cryocooler

    DOE Patents [OSTI]

    Gschneidner, K.A. Jr.; Pecharsky, V.K.

    1996-07-23

    A two stage Gifford-McMahon cryocooler is disclosed having a low temperature stage for reaching approximately 10K, wherein the low temperature stage includes a passive magnetic heat regenerator selected from the group consisting of Er{sub 6}Ni{sub 2}Sn, Er{sub 6}Ni{sub 2}Pb, Er{sub 6}Ni{sub 2}(Sn{sub 0.75}Ga{sub 0.25}), and Er{sub 9}Ni{sub 3}Sn comprising a mixture of Er{sub 3}Ni and Er{sub 6}Ni{sub 2}Sn in the microstructure. 14 figs.

  16. Analysis of passive dosimeter samples by thermal desorption

    E-Print Network [OSTI]

    Schultz, Sherryl Anne

    1981-01-01

    described in this paper, the passive dosimeter was de- sorbed with carbon disulfide and thermal desorpt1on had only been reported for the analysis of sorbent tubes. The proposed technique avoided the problems associated with both the toxic, flammable... carbon d1sulfide and the battery-operated pumps used for the analysis of sorbent tubes. This research project was designed to assess the technical feasibility of the thermal desorption of passi ve dosimeters; not to optimize cond1t1ons, nor to survey...

  17. Category:Passive Seismic Techniques | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmentalBowerbank,CammackFLIR Jump to: navigation,GroundNear InfraredOpenEI JumpPassive

  18. Passive Corrosion Sensor Development. (Conference) | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTech ConnectSpeeding access to(Conference)Connect Passivation Effects in Copper

  19. Passive Vector Geoacoustic Inversion in Coastal Areas Using a sequential

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTech ConnectSpeeding access to(Conference)Connect Passivation Effects in

  20. Passive Vector Geoacoustic Inversion in Coastal Areas Using a sequential

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTech ConnectSpeeding access to(Conference)Connect Passivation Effects inUnscented