National Library of Energy BETA

Sample records for obtain finer spatial

  1. Bimodal sensory discrimination is finer than dual single modality discrimination

    E-Print Network [OSTI]

    Johnston, Alan

    Bimodal sensory discrimination is finer than dual single modality discrimination Department of Psychology and Complex, University College London, London, U.KAlan Johnston Here we show that discriminating the first or second samples. We propose that the bimodal signal discrimination advantage arises from

  2. Tracking of Transgene Expression in Soybean using Robotics and GFP John James Finer

    E-Print Network [OSTI]

    Finer, John J.

    Tracking of Transgene Expression in Soybean using Robotics and GFP John James Finer Department system that is composed of a 2-dimensional robotics platform, a Leica MZFLIII fluorescence dissecting on the robotics platform. The platform contains docking centers for 16 Petri dishes, which are secured

  3. On an economic prediction of the finer resolution level wavelet coefficients in electron structure calculations

    E-Print Network [OSTI]

    Szilvia Nagy; János Pipek

    2015-02-28

    In wavelet based electron structure calculations introducing a new, finer resolution level is usually an expensive task, this is why often a two-level approximation is used with very fine starting resolution level. This process results in large matrices to calculate with and a large number of coefficients to be stored. In our previous work we have developed an adaptively refining solution scheme that determines the indices, where refined basis functions are to be included, and later a method for predicting the next, finer resolution coefficients in a very economic way. In the present contribution we would like to determine, whether the method can be applied for predicting not only the first, but also the other, higher resolution level coefficients. Also the energy expectation values of the predicted wave functions are studied, as well as the scaling behaviour of the coefficients in the fine resolution limit.

  4. An iterative procedure to obtain inverse response functions for thick-target correction of measured charged-particle spectra

    E-Print Network [OSTI]

    S. Pomp; U. Tippawan

    2006-08-25

    A new method for correcting charged-particle spectra for thick target effects is described. Starting with a trial function, inverse response functions are found by an iterative procedure. The variances corresponding to the measured spectrum are treated similiarly and in parallel. Oscillations of the solution are avoided by rebinning the data to finer bins during a correction iteration and back to the original or wider binning after each iteration. This thick-target correction method has been used for data obtained with the MEDLEY facility at the The Svedberg Laboratory, Uppsala, Sweden, and is here presented in detail and demonstrated for two test cases.

  5. Spatial Statistical Procedures to Validate Input Data in Energy Models

    SciTech Connect (OSTI)

    Johannesson, G.; Stewart, J.; Barr, C.; Brady Sabeff, L.; George, R.; Heimiller, D.; Milbrandt, A.

    2006-01-01

    Energy modeling and analysis often relies on data collected for other purposes such as census counts, atmospheric and air quality observations, economic trends, and other primarily non-energy related uses. Systematic collection of empirical data solely for regional, national, and global energy modeling has not been established as in the abovementioned fields. Empirical and modeled data relevant to energy modeling is reported and available at various spatial and temporal scales that might or might not be those needed and used by the energy modeling community. The incorrect representation of spatial and temporal components of these data sets can result in energy models producing misleading conclusions, especially in cases of newly evolving technologies with spatial and temporal operating characteristics different from the dominant fossil and nuclear technologies that powered the energy economy over the last two hundred years. Increased private and government research and development and public interest in alternative technologies that have a benign effect on the climate and the environment have spurred interest in wind, solar, hydrogen, and other alternative energy sources and energy carriers. Many of these technologies require much finer spatial and temporal detail to determine optimal engineering designs, resource availability, and market potential. This paper presents exploratory and modeling techniques in spatial statistics that can improve the usefulness of empirical and modeled data sets that do not initially meet the spatial and/or temporal requirements of energy models. In particular, we focus on (1) aggregation and disaggregation of spatial data, (2) predicting missing data, and (3) merging spatial data sets. In addition, we introduce relevant statistical software models commonly used in the field for various sizes and types of data sets.

  6. Scaling impacts on environmental controls and spatial heterogeneity of soil organic carbon stocks

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

    Mishra, U.; Riley, W. J.

    2015-07-02

    The spatial heterogeneity of land surfaces affects energy, moisture, and greenhouse gas exchanges with the atmosphere. However, representing the heterogeneity of terrestrial hydrological and biogeochemical processes in Earth system models (ESMs) remains a critical scientific challenge. We report the impact of spatial scaling on environmental controls, spatial structure, and statistical properties of soil organic carbon (SOC) stocks across the US state of Alaska. We used soil profile observations and environmental factors such as topography, climate, land cover types, and surficial geology to predict the SOC stocks at a 50 m spatial scale. These spatially heterogeneous estimates provide a data setmore »with reasonable fidelity to the observations at a sufficiently high resolution to examine the environmental controls on the spatial structure of SOC stocks. We upscaled both the predicted SOC stocks and environmental variables from finer to coarser spatial scales (s = 100, 200, and 500 m and 1, 2, 5, and 10 km) and generated various statistical properties of SOC stock estimates. We found different environmental factors to be statistically significant predictors at different spatial scales. Only elevation, temperature, potential evapotranspiration, and scrub land cover types were significant predictors at all scales. The strengths of control (the median value of geographically weighted regression coefficients) of these four environmental variables on SOC stocks decreased with increasing scale and were accurately represented using mathematical functions (R2 = 0.83–0.97). The spatial structure of SOC stocks across Alaska changed with spatial scale. Although the variance (sill) and unstructured variability (nugget) of the calculated variograms of SOC stocks decreased exponentially with scale, the correlation length (range) remained relatively constant across scale. The variance of predicted SOC stocks decreased with spatial scale over the range of 50 m to ~ 500 m, and remained constant beyond this scale. The fitted exponential function accounted for 98 % of variability in the variance of SOC stocks. We found moderately accurate linear relationships between mean and higher-order moments of predicted SOC stocks (R2 ? 0.55–0.63). Current ESMs operate at coarse spatial scales (50–100 km), and are therefore unable to represent environmental controllers and spatial heterogeneity of high-latitude SOC stocks consistent with observations. We conclude that improved understanding of the scaling behavior of environmental controls and statistical properties of SOC stocks could improve ESM land model benchmarking and perhaps allow representation of spatial heterogeneity of biogeochemistry at scales finer than those currently resolved by ESMs.« less

  7. Scaling impacts on environmental controls and spatial heterogeneity of soil organic carbon stocks

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

    Mishra, U.; Riley, W. J.

    2015-01-27

    The spatial heterogeneity of land surfaces affects energy, moisture, and greenhouse gas exchanges with the atmosphere. However, representing heterogeneity of terrestrial hydrological and biogeochemical processes in earth system models (ESMs) remains a critical scientific challenge. We report the impact of spatial scaling on environmental controls, spatial structure, and statistical properties of soil organic carbon (SOC) stocks across the US state of Alaska. We used soil profile observations and environmental factors such as topography, climate, land cover types, and surficial geology to predict the SOC stocks at a 50 m spatial scale. These spatially heterogeneous estimates provide a dataset with reasonablemore »fidelity to the observations at a sufficiently high resolution to examine the environmental controls on the spatial structure of SOC stocks. We upscaled both the predicted SOC stocks and environmental variables from finer to coarser spatial scales (s = 100, 200, 500 m, 1, 2, 5, 10 km) and generated various statistical properties of SOC stock estimates. We found different environmental factors to be statistically significant predictors at different spatial scales. Only elevation, temperature, potential evapotranspiration, and scrub land cover types were significant predictors at all scales. The strengths of control (the median value of geographically weighted regression coefficients) of these four environmental variables on SOC stocks decreased with increasing scale and were accurately represented using mathematical functions (R2 = 0.83–0.97). The spatial structure of SOC stocks across Alaska changed with spatial scale. Although the variance (sill) and unstructured variability (nugget) of the calculated variograms of SOC stocks decreased exponentially with scale, the correlation length (range) remained relatively constant across scale. The variance of predicted SOC stocks decreased with spatial scale over the range of 50 to ~ 500 m, and remained constant beyond this scale. The fitted exponential function accounted for 98% of variability in the variance of SOC stocks. We found moderately-accurate linear relationships between mean and higher-order moments of predicted SOC stocks (R2 ~ 0.55–0.63). Current ESMs operate at coarse spatial scales (50–100 km), and are therefore unable to represent environmental controllers and spatial heterogeneity of high-latitude SOC stocks consistent with observations. We conclude that improved understanding of the scaling behavior of environmental controls and statistical properties of SOC stocks can improve ESM land model benchmarking and perhaps allow representation of spatial heterogeneity of biogeochemistry at scales finer than those currently resolved by ESMs.« less

  8. Truncated states obtained by iteration

    E-Print Network [OSTI]

    W. B. Cardoso; N. G. de Almeida

    2007-01-06

    Quantum states of the electromagnetic field are of considerable importance, finding potential application in various areas of physics, as diverse as solid state physics, quantum communication and cosmology. In this paper we introduce the concept of truncated states obtained via iterative processes (TSI) and study its statistical features, making an analogy with dynamical systems theory (DST). As a specific example, we have studied TSI for the doubling and the logistic functions, which are standard functions in studying chaos. TSI for both the doubling and logistic functions exhibit certain similar patterns when their statistical features are compared from the point of view of DST. A general method to engineer TSI in the running-wave domain is employed, which includes the errors due to the nonidealities of detectors and photocounts.

  9. Two-wavelength spatial-heterodyne holography

    DOE Patents [OSTI]

    Hanson, Gregory R. (Clinton, TN); Bingham, Philip R. (Knoxville, TN); Simpson, John T. (Knoxville, TN); Karnowski, Thomas P. (Knoxville, TN); Voelkl, Edgar (Austin, TX)

    2007-12-25

    Systems and methods are described for obtaining two-wavelength differential-phase holograms. A method includes determining a difference between a filtered analyzed recorded first spatially heterodyne hologram phase and a filtered analyzed recorded second spatially-heterodyned hologram phase.

  10. Spatially DistributedSpatially Distributed Experimentation toExperimentation to

    E-Print Network [OSTI]

    Rubloff, Gary W.

    : Spatially distributed atomic layer deposition Spatially Distributed Atomic LayerSpatially Distributed Atomic properties Significance Atomic layer deposition (ALD) is widely sought for its atomic-scale thickness control, MKS Instruments #12;Rubloff: Spatially distributed atomic layer deposition Spatially Distributed

  11. Plasmonics in the near-infrared : spatial, spectral, and temporal studies of surface plasmon polaritons

    E-Print Network [OSTI]

    Tetz, Kevin

    2006-01-01

    of SPP pulse provides additional electromagnetic ?eldpulses using a time-resolved spatial heterodyne imaging technique to obtain spatial distributions of the electromagnetic ?pulses using a time-resolved spatial heterodyne imaging (TRSHI) technique to obtain spatial distributions of the electromagnetic ?

  12. Digitales Video 1 Spatial Transformations

    E-Print Network [OSTI]

    spatial transformations derived for digital image warping applications in computer vision and computerDigitales Video 1 Spatial Transformations 2. SPATIAL TRANSFORMATIONS This chapter describes common graphics. A spatial transformation is a mapping function that establishes a spatial correspondence between

  13. Spatially-Heterodyned Holography

    DOE Patents [OSTI]

    Thomas, Clarence E [Knoxville, TN; Hanson, Gregory R [Clinton, TN

    2006-02-21

    A method of recording a spatially low-frequency heterodyne hologram, including spatially heterodyne fringes for Fourier analysis, includes: splitting a laser beam into a reference beam and an object beam; interacting the object beam with an object; focusing the reference beam and the object beam at a focal plane of a digital recorder to form a spatially low-frequency heterodyne hologram including spatially heterodyne fringes for Fourier analysis; digital recording the spatially low-frequency heterodyne hologram; Fourier transforming axes of the recorded spatially low-frequency heterodyne hologram including spatially heterodyne fringes in Fourier space to sit on top of a heterodyne carrier frequency defined by an angle between the reference beam and the object beam; cutting off signals around an origin; and performing an inverse Fourier transform.

  14. Robustness of Spatial Micronetworks

    E-Print Network [OSTI]

    McAndrew, Thomas C; Bagrow, James P

    2015-01-01

    Power lines, roadways, pipelines and other physical infrastructure are critical to modern society. These structures may be viewed as spatial networks where geographic distances play a role in the functionality and construction cost of links. Traditionally, studies of network robustness have primarily considered the connectedness of large, random networks. Yet for spatial infrastructure physical distances must also play a role in network robustness. Understanding the robustness of small spatial networks is particularly important with the increasing interest in microgrids, small-area distributed power grids that are well suited to using renewable energy resources. We study the random failures of links in small networks where functionality depends on both spatial distance and topological connectedness. By introducing a percolation model where the failure of each link is proportional to its spatial length, we find that, when failures depend on spatial distances, networks are more fragile than expected. Accounting...

  15. Completely distinguishable projections of spatial graphs

    E-Print Network [OSTI]

    Nikkuni, Ryo

    . 1.1. We can obtain the eight spatial embeddings g1, g2, . . . , g8 of G from ^f as illustrated 2 3 4 5 6 g1 g2 g3 g4 g5 g6 g7 g8 Fig. 1.2. 2 #12;2. Completely distinguishable projections

  16. A multivariate spatial interpolation of airborne -ray data using the geological constraints

    E-Print Network [OSTI]

    Roma "La Sapienza", Università di

    A multivariate spatial interpolation of airborne -ray data using the geological constraints Enrico: Multivariate analysis Airborne -ray spectrometry Collocated cokriging interpolator Elba Island Natural (Italy) obtained with a multivariate spatial interpolation of airborne -ray data using the constraints

  17. Treatment of biomass to obtain ethanol

    DOE Patents [OSTI]

    Dunson, Jr., James B. (Newark, DE); Elander, Richard T. (Evergreen, CO); Tucker, III, Melvin P. (Lakewood, CO); Hennessey, Susan Marie (Avondale, PA)

    2011-08-16

    Ethanol was produced using biocatalysts that are able to ferment sugars derived from treated biomass. Sugars were obtained by pretreating biomass under conditions of high solids and low ammonia concentration, followed by saccharification.

  18. Spatial Search, Final Report

    E-Print Network [OSTI]

    Ballatore, Andrea; Hegarty, Mary; Kuhn, Werner; Parsons, Ed

    2015-01-01

    linked open data is also an important challenge. Deep web .Tapping the deep web spatially can unleash resources,exist to delve into the deep web. The geospatial dimension

  19. Mapping spatial relations

    E-Print Network [OSTI]

    Kasturirangan, Rajesh, 1971-

    2004-01-01

    One of the fundamental issues in cognitive science is the problem of grounding concepts in the perceptual world. In this thesis, I present a computational theory for how spatial relations are grounded in the perceptual ...

  20. Classification of Ding's Schubert Varieties: Finer Rook Equivalence

    E-Print Network [OSTI]

    Develin, Mike; Martin, Jeremy L.; Reiner, Victor

    2007-02-01

    manifolds, indexed by integer partitions A and in bijection with dominant permutations. He observed that the Schubert cell structure ofX,\\ is indexed by maximal rook placements on the Ferrers board B\\, and that the integral cohomology groups H* (X^; Z), H..., the number Rk(B) of /c-rook placements is the same as Foata and Schiitzenberger [4] solved the problem for the well-behaved subclass of Ferrers boards B\\; these are the usual Ferrers diagrams associated with partitions1 (1) A=(0< Xx <•••< A„), having all...

  1. Unit 9: Spatial Data Conversion

    E-Print Network [OSTI]

    9, CCTP; Dodson, Rustin

    1998-01-01

    UNIT 9: SPATIAL DATA CONVERSION Written by Rustin Dodson,Programs Page 1 Unit 9: Spatial Data Conversion freezingPrograms Page 2 Unit 9: Spatial Data Conversion Export USGS

  2. Obtaining Disaster Assistance for Public Infrastructure 

    E-Print Network [OSTI]

    Taylor, Greg

    2005-10-10

    stream_source_info pdf_2241.pdf.txt stream_content_type text/plain stream_size 7983 Content-Encoding ISO-8859-1 stream_name pdf_2241.pdf.txt Content-Type text/plain; charset=ISO-8859-1 ER-031 5-06 Obtaining Disaster... and Recov- ery Grant http://www.orca.state.tx.us/whatsNew/pdf Rural%20Health%20Disaster%20Relief% 2%20Recovery%20Grant.pdf Those eligible for this program include: ? rural hospitals in counties with popula- tions of 150,000 or fewer and that have...

  3. HOW TO OBTAIN EIA PRODUCTS AND SERVICES

    Gasoline and Diesel Fuel Update (EIA)

    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 Natural GasAdjustments (Billion Cubic Feet)DecadeYear Jan Feb Mar Apr MayYear Jan FebMississippi119,456 111,949HOW TO OBTAIN

  4. Obtaining Reliable Feedback for Sanctioning Reputation Mechanisms

    E-Print Network [OSTI]

    Faltings, B; 10.1613/jair.2243

    2011-01-01

    Reputation mechanisms offer an effective alternative to verification authorities for building trust in electronic markets with moral hazard. Future clients guide their business decisions by considering the feedback from past transactions; if truthfully exposed, cheating behavior is sanctioned and thus becomes irrational. It therefore becomes important to ensure that rational clients have the right incentives to report honestly. As an alternative to side-payment schemes that explicitly reward truthful reports, we show that honesty can emerge as a rational behavior when clients have a repeated presence in the market. To this end we describe a mechanism that supports an equilibrium where truthful feedback is obtained. Then we characterize the set of pareto-optimal equilibria of the mechanism, and derive an upper bound on the percentage of false reports that can be recorded by the mechanism. An important role in the existence of this bound is played by the fact that rational clients can establish a reputation for...

  5. Particle detector spatial resolution

    DOE Patents [OSTI]

    Perez-Mendez, V.

    1992-12-15

    Method and apparatus for producing separated columns of scintillation layer material, for use in detection of X-rays and high energy charged particles with improved spatial resolution is disclosed. A pattern of ridges or projections is formed on one surface of a substrate layer or in a thin polyimide layer, and the scintillation layer is grown at controlled temperature and growth rate on the ridge-containing material. The scintillation material preferentially forms cylinders or columns, separated by gaps conforming to the pattern of ridges, and these columns direct most of the light produced in the scintillation layer along individual columns for subsequent detection in a photodiode layer. The gaps may be filled with a light-absorbing material to further enhance the spatial resolution of the particle detector. 12 figs.

  6. Particle detector spatial resolution

    DOE Patents [OSTI]

    Perez-Mendez, Victor (Berkeley, CA)

    1992-01-01

    Method and apparatus for producing separated columns of scintillation layer material, for use in detection of X-rays and high energy charged particles with improved spatial resolution. A pattern of ridges or projections is formed on one surface of a substrate layer or in a thin polyimide layer, and the scintillation layer is grown at controlled temperature and growth rate on the ridge-containing material. The scintillation material preferentially forms cylinders or columns, separated by gaps conforming to the pattern of ridges, and these columns direct most of the light produced in the scintillation layer along individual columns for subsequent detection in a photodiode layer. The gaps may be filled with a light-absorbing material to further enhance the spatial resolution of the particle detector.

  7. Proposed Curriculum in Spatial Sciences

    E-Print Network [OSTI]

    Proposed Curriculum in Spatial Sciences Catalog 14-15 University Core Curriculum Required Courses...............................................................................................................(3-2) 4 39 #12;Spatial Sciences Core Curriculum ESSM 444 Remote Sensing of the Environment

  8. Systems and methods for knowledge discovery in spatial data

    DOE Patents [OSTI]

    Obradovic, Zoran; Fiez, Timothy E.; Vucetic, Slobodan; Lazarevic, Aleksandar; Pokrajac, Dragoljub; Hoskinson, Reed L.

    2005-03-08

    Systems and methods are provided for knowledge discovery in spatial data as well as to systems and methods for optimizing recipes used in spatial environments such as may be found in precision agriculture. A spatial data analysis and modeling module is provided which allows users to interactively and flexibly analyze and mine spatial data. The spatial data analysis and modeling module applies spatial data mining algorithms through a number of steps. The data loading and generation module obtains or generates spatial data and allows for basic partitioning. The inspection module provides basic statistical analysis. The preprocessing module smoothes and cleans the data and allows for basic manipulation of the data. The partitioning module provides for more advanced data partitioning. The prediction module applies regression and classification algorithms on the spatial data. The integration module enhances prediction methods by combining and integrating models. The recommendation module provides the user with site-specific recommendations as to how to optimize a recipe for a spatial environment such as a fertilizer recipe for an agricultural field.

  9. Influence of current mass on the spatially inhomogeneous chiral condensate

    E-Print Network [OSTI]

    Shinji Maedan

    2009-12-18

    It is known that, in the chiral limit, spatially inhomogeneous chiral condensate occurs in the Nambu-Jona-Lasinio (NJL) model at finite density within a mean-field approximation. We study here how an introduction of current quark mass affects the ground state with the spatially inhomogeneous chiral condensate. Numerical calculations show that, even if the current quark mass is introduced, the spatially inhomogeneous chiral condensate can take place. In order to obtain the ground state, the thermodynamic potential is calculated with a mean-field approximation. The influence of finite current mass on the thermodynamic potential consists of following two parts. One is a part coming from the field energy of the condensate, which favors inhomogeneous chiral condensate. The other is a part coming from the Dirac sea and the Fermi sea, which favors homogeneous chiral condensate. We also find that when the spatially inhomogeneous chiral condensate occurs, the baryon number density becomes spatially inhomogeneous.

  10. Power-law Spatial Dispersion from Fractional Liouville Equation

    E-Print Network [OSTI]

    Vasily E. Tarasov

    2013-07-18

    A microscopic model in the framework of fractional kinetics to describe spatial dispersion of power-law type is suggested. The Liouville equation with the Caputo fractional derivatives is used to obtain the power-law dependence of the absolute permittivity on the wave vector. The fractional differential equations for electrostatic potential in the media with power-law spatial dispersion are derived. The particular solutions of these equations for the electric potential of point charge in this media are considered.

  11. Power-law spatial dispersion from fractional Liouville equation

    SciTech Connect (OSTI)

    Tarasov, Vasily E. [Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow 119991 (Russian Federation)] [Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow 119991 (Russian Federation)

    2013-10-15

    A microscopic model in the framework of fractional kinetics to describe spatial dispersion of power-law type is suggested. The Liouville equation with the Caputo fractional derivatives is used to obtain the power-law dependence of the absolute permittivity on the wave vector. The fractional differential equations for electrostatic potential in the media with power-law spatial dispersion are derived. The particular solutions of these equations for the electric potential of point charge in this media are considered.

  12. Synchronization in networks of spatially extended systems

    SciTech Connect (OSTI)

    Filatova, Anastasiya E.; Hramov, Alexander E.; Koronovskii, Alexey A.; Boccaletti, Stefano

    2008-06-15

    Synchronization processes in networks of spatially extended dynamical systems are analytically and numerically studied. We focus on the relevant case of networks whose elements (or nodes) are spatially extended dynamical systems, with the nodes being connected with each other by scalar signals. The stability of the synchronous spatio-temporal state for a generic network is analytically assessed by means of an extension of the master stability function approach. We find an excellent agreement between the theoretical predictions and the data obtained by means of numerical calculations. The efficiency and reliability of this method is illustrated numerically with networks of beam-plasma chaotic systems (Pierce diodes). We discuss also how the revealed regularities are expected to take place in other relevant physical and biological circumstances.

  13. High spatial resolution brain functional MRI using submillimeter balanced steady-state free precession acquisition

    SciTech Connect (OSTI)

    Wu, Pei-Hsin; Chung, Hsiao-Wen; Tsai, Ping-Huei; Wu, Ming-Long; Chuang, Tzu-Chao; Shih, Yi-Yu; Huang, Teng-Yi

    2013-12-15

    Purpose: One of the technical advantages of functional magnetic resonance imaging (fMRI) is its precise localization of changes from neuronal activities. While current practice of fMRI acquisition at voxel size around 3 × 3 × 3 mm{sup 3} achieves satisfactory results in studies of basic brain functions, higher spatial resolution is required in order to resolve finer cortical structures. This study investigated spatial resolution effects on brain fMRI experiments using balanced steady-state free precession (bSSFP) imaging with 0.37 mm{sup 3} voxel volume at 3.0 T. Methods: In fMRI experiments, full and unilateral visual field 5 Hz flashing checkerboard stimulations were given to healthy subjects. The bSSFP imaging experiments were performed at three different frequency offsets to widen the coverage, with functional activations in the primary visual cortex analyzed using the general linear model. Variations of the spatial resolution were achieved by removing outerk-space data components. Results: Results show that a reduction in voxel volume from 3.44 × 3.44 × 2 mm{sup 3} to 0.43 × 0.43 × 2 mm{sup 3} has resulted in an increase of the functional activation signals from (7.7 ± 1.7)% to (20.9 ± 2.0)% at 3.0 T, despite of the threefold SNR decreases in the original images, leading to nearly invariant functional contrast-to-noise ratios (fCNR) even at high spatial resolution. Activation signals aligning nicely with gray matter sulci at high spatial resolution would, on the other hand, have possibly been mistaken as noise at low spatial resolution. Conclusions: It is concluded that the bSSFP sequence is a plausible technique for fMRI investigations at submillimeter voxel widths without compromising fCNR. The reduction of partial volume averaging with nonactivated brain tissues to retain fCNR is uniquely suitable for high spatial resolution applications such as the resolving of columnar organization in the brain.

  14. Spatial Information and Intelligence http://spatial.ist.psu.edu

    E-Print Network [OSTI]

    Squicciarini, Anna Cinzia

    -Computer Interaction. He conducts research in the areas of geographical information systems, geocollaboration, human approaches toward natural, multi-modal, multi-user dialogue-enabled interfaces to geographic information. OVERVIEW Current computing systems for spatial information and spatial intelligence restrict human

  15. Spatial consistency of Chinook salmon redd distribution within and among years in the Cowlitz River, Washington

    SciTech Connect (OSTI)

    Klett, Katherine J.; Torgersen, Christian; Henning, Julie; Murray, Christopher J.

    2013-04-28

    We investigated the spawning patterns of Chinook salmon Oncorhynchus tshawytscha on the lower Cowlitz River, Washington (USA) using a unique set of fine- and coarse-scale 35 temporal and spatial data collected during bi-weekly aerial surveys conducted in 1991-2009 (500 m to 28 km resolution) and 2008-2009 (100-500 m resolution). Redd locations were mapped from a helicopter during 2008 and 2009 with a hand-held global positioning system (GPS) synchronized with in-flight audio recordings. We examined spatial patterns of Chinook salmon redd reoccupation among and within years in relation to segment-scale geomorphic features. Chinook salmon spawned in the same sections each year with little variation among years. On a coarse scale, five years (1993, 1998, 2000, 2002, and 2009) were compared for reoccupation. Redd locations were highly correlated among years resulting in a minimum correlation coefficient of 0.90 (adjusted P = 0.002). Comparisons on a fine scale (500 m) between 2008 and 2009 also revealed a high degree of consistency among redd locations (P < 0.001). On a finer temporal scale, we observed that salmon spawned in the same sections during the first and last week (2008: P < 0.02; and 2009: P < 0.001). Redds were clustered in both 2008 and 2009 (P < 0.001). Regression analysis with a generalized linear model at the 500-m scale indicated that river kilometer and channel bifurcation were positively associated with redd density, whereas sinuosity was negatively associated with redd density. Collecting data on specific redd locations with a GPS during aerial surveys was logistically feasible and cost effective and greatly enhanced the spatial precision of Chinook salmon spawning surveys.

  16. Faster processing of multiple spatially-heterodyned direct to digital holograms

    DOE Patents [OSTI]

    Hanson, Gregory R.; Bingham, Philip R.

    2006-10-03

    Systems and methods are described for faster processing of multiple spatially-heterodyned direct to digital holograms. A method includes of obtaining multiple spatially-heterodyned holograms, includes: digitally recording a first spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; digitally recording a second spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; Fourier analyzing the recorded first spatially-heterodyned hologram by shifting a first original origin of the recorded first spatially-heterodyned hologram including spatial heterodyne fringes in Fourier space to sit on top of a spatial-heterodyne carrier frequency defined as a first angle between a first reference beam and a first, object beam; applying a first digital filter to cut off signals around the first original origin and performing an inverse Fourier transform on the result; Fourier analyzing the recorded second spatially-heterodyned hologram by shifting a second original origin of the recorded second spatially-heterodyned hologram including spatial heterodyne fringes in Fourier space to sit on top of a spatial-heterodyne carrier frequency defined as a second angle between a second reference beam and a second object beam; and applying a second digital filter to cut off signals around the second original origin and performing an inverse Fourier transform on the result, wherein digitally recording the first spatially-heterodyned hologram is completed before digitally recording the second spatially-heterodyned hologram and a single digital image includes both the first spatially-heterodyned hologram and the second spatially-heterodyned hologram.

  17. Faster processing of multiple spatially-heterodyned direct to digital holograms

    DOE Patents [OSTI]

    Hanson, Gregory R [Clinton, TN; Bingham, Philip R [Knoxville, TN

    2008-09-09

    Systems and methods are described for faster processing of multiple spatially-heterodyned direct to digital holograms. A method includes of obtaining multiple spatially-heterodyned holograms, includes: digitally recording a first spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; digitally recording a second spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; Fourier analyzing the recorded first spatially-heterodyned hologram by shifting a first original origin of the recorded first spatially-heterodyned hologram including spatial heterodyne fringes in Fourier space to sit on top of a spatial-heterodyne carrier frequency defined as a first angle between a first reference beam and a first object beam; applying a first digital filter to cut off signals around the first original origin and performing an inverse Fourier transform on the result; Fourier analyzing the recorded second spatially-heterodyned hologram by shifting a second original origin of the recorded second spatially-heterodyned hologram including spatial heterodyne fringes in Fourier space to sit on top of a spatial-heterodyne carrier frequency defined as a second angle between a second reference beam and a second object beam; and applying a second digital filter to cut off signals around the second original origin and performing an inverse Fourier transform on the result, wherein digitally recording the first spatially-heterodyned hologram is completed before digitally recording the second spatially-heterodyned hologram and a single digital image includes both the first spatially-heterodyned hologram and the second spatially-heterodyned hologram.

  18. Wind Energy and Spatial Technology

    E-Print Network [OSTI]

    Schweik, Charles M.

    2/3/2011 1 Wind Energy and Spatial Technology Lori Pelech Why Wind Energy? A clean, renewable 2,600 tons of carbon emissions annually ­ The economy · Approximately 85,000 wind energy workers to Construct a Wind Farm... Geo-Spatial Components of Wind Farm Development Process Selecting a Project Site

  19. Microfluidics Using Spatially Defined Arrays

    E-Print Network [OSTI]

    Ismagilov, Rustem F.

    Microfluidics Using Spatially Defined Arrays of Droplets in One, Two, and Three Dimensions Rebecca: MICROFLUIDIC COMPARTMENTALIZATION This review describes the microfluidic generation and manipulation of excellent reviews on formation, manipulation, and applications of droplets (1­8). Microfluidics

  20. Analyzing spatially-varying blur

    E-Print Network [OSTI]

    Chakrabarti, Ayan

    Blur is caused by a pixel receiving light from multiple scene points, and in many cases, such as object motion, the induced blur varies spatially across the image plane. However, the seemingly straight-forward task of ...

  1. Effect of gis learning on spatial ability 

    E-Print Network [OSTI]

    Lee, Jong Won

    2006-08-16

    This research used a spatial skills test and cognitive-mapping test to examine the effect of GIS learning on the spatial ability and spatial problem solving of college students. A total of 80 participants, undergraduate students at Texas A...

  2. Unit  045 - Non-Spatial Database Models

    E-Print Network [OSTI]

    045, CC in GIScience; Meyer, Thomas H.

    2000-01-01

    25 Unit 045 - Non-Spatial Database Models Core Curriculum -26 Unit 045 - Non-Spatial Database Models Core Curriculum -27 Unit 045 - Non-Spatial Database Models Core Curriculum -

  3. Unit 11 - Spatial Objects and Database Models

    E-Print Network [OSTI]

    Unit 11, CC in GIS; Nyerges, Timothy L.

    1990-01-01

    Spatial Objects and Database Models NCGIA Core Curriculum inSpatial Objects and Database Models NCGIA Core Curriculum inSpatial Objects and Database Models NCGIA Core Curriculum in

  4. Future Directions in Spatial Demography, Position Papers

    E-Print Network [OSTI]

    Center for Spatial Studies (UCSB), Population Research Institute (Pennsylvania State University)

    2011-01-01

    2011 Specialist Meeting—Future Directions in Spatial3–13. 2011 Specialist Meeting—Future Directions in SpatialInc. 2011 Specialist Meeting—Future Directions in Spatial

  5. Structural Interactions in Spatial Panels

    E-Print Network [OSTI]

    Bhattacharjee, Arnab; Holly, Sean

    , the ele- ments of this matrix represent the direction and strength of spillovers between each pair of units. Alternatively, multifactor approaches which assume cross section dependence can be explained by a …nite number of unobserved com- mon factors... on an application to cross-member interactions within a committee setting. The idea behind spatial weights matrix is that there are spillover e¤ects across the economic agents because of spatial or other forms of local cross section dependence. Such a matrix, W...

  6. Multivariate analysis of spatial patterns: a unified approach to local and global structures

    E-Print Network [OSTI]

    Thioulouse, Jean

    Multivariate analysis of spatial patterns: a unified approach to local and global structures JEAN structures. The introduction of the D-centring (centring with respect to the neighbouring weights) allows us obtained on both simulated and real data sets, showing how spatial structure can be detected and analysed

  7. Upstream entrainment in numerical simulations of spatially evolving Pradeep C. Babu and Krishnan Mahesha)

    E-Print Network [OSTI]

    Mahesh, Krishnan

    Upstream entrainment in numerical simulations of spatially evolving round jets Pradeep C. Babu) Direct numerical simulation is used to study the effect of entrainment near the inflow nozzle on spatially evolving round jets. Inflow entrainment is obtained by providing a buffer region upstream

  8. Search for Spatially Extended Fermi-LAT Sources Using Two Years of Data

    SciTech Connect (OSTI)

    Lande, Joshua; Ackermann, Markus; Allafort, Alice; Ballet, Jean; Bechtol, Keith; Burnett, Toby; Cohen-Tanugi, Johann; Drlica-Wagner, Alex; Funk, Stefan; Giordano, Francesco; Grondin, Marie-Helene; Kerr, Matthew; Lemoine-Goumard, Marianne

    2012-07-13

    Spatial extension is an important characteristic for correctly associating {gamma}-ray-emitting sources with their counterparts at other wavelengths and for obtaining an unbiased model of their spectra. We present a new method for quantifying the spatial extension of sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi). We perform a series of Monte Carlo simulations to validate this tool and calculate the LAT threshold for detecting the spatial extension of sources. We then test all sources in the second Fermi -LAT catalog (2FGL) for extension. We report the detection of seven new spatially extended sources.

  9. Policy Flash 2013-24 Fee Determinations: Requirement to Obtain...

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

    Requirement to Obtain Acquisition Executive's Input. Questions concerning this policy flash should be directed to Michael Righi of the Contract and Financial Assistance...

  10. Integrated storage and querying of spatially varying data quality information in a relational spatial database

    E-Print Network [OSTI]

    Duckham, Matt

    spatial database M.G.S.M Zaffar Sadiq and Matt Duckham Department of Geomatics, University of Melbourne Variation in Quality Keywords Spatial data quality; spatial database; relational database management system for storing and retrieving spatially varying data quality information in a relational spatial database. Rather

  11. Generator for gallium-68 and compositions obtained therefrom

    DOE Patents [OSTI]

    Neirinckx, Rudi D. (Medfield, MA); Davis, Michael A. (Westwood, MA)

    1981-01-01

    A generator for obtaining radioactive gallium-68 from germanium-68 bound in a resin containing unsubstituted phenolic hydroxyl groups. The germanium-68 is loaded into the resin from an aqueous solution of the germanium-68. A physiologically acceptable solution of gallium-68 having an activity of 0.1 to 50 millicuries per milliliter of gallium-68 solution is obtained. The solution is obtained from the bound germanium-68 which forms gallium-68 in situ by eluting the column with a hydrochloric acid solution to form an acidic solution of gallium-68. The acidic solution of gallium-68 can be neutralized.

  12. An important challenge in magnetic fusion research is to obtain...

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

    control of edge transport barriers on Alcator C-Mod A crucial challenge in magnetic fusion is to obtain high energy confinement in a stationary plasma that is compatible with...

  13. Treatment of biomass to obtain a target chemical

    DOE Patents [OSTI]

    Dunson, Jr., James B. (Newark, DE); Tucker, III, Melvin P. (Lakewood, CO); Elander, Richard T. (Evergreen, CO); Hennessey, Susan Marie (Avondale, PA)

    2010-08-24

    Target chemicals were produced using biocatalysts that are able to ferment sugars derived from treated biomass. Sugars were obtained by pretreating biomass under conditions of high solids and low ammonia concentration, followed by saccharification.

  14. Earthquake spatial distribution: the correlation dimension

    E-Print Network [OSTI]

    Kagan, Yan Y

    2007-01-01

    Spatial distribution of earthquakes: The three-point momentSpatial distribution of earthquakes: The four-point momentStochastic model of earthquake fault geom- etry, Geophys. J.

  15. Multi-model adaptive spatial hypertext 

    E-Print Network [OSTI]

    Francisco-Revilla, Luis

    2005-02-17

    Information delivery on the Web often relies on general purpose Web pages that require the reader to adapt to them. This limitation is addressed by approaches such as spatial hypermedia and adaptive hypermedia. Spatial hypermedia augments...

  16. Spatial Analysis of Kansas Farm Ponds

    E-Print Network [OSTI]

    Callihan, Ryan Andrew

    2011-11-16

    RYAN CALLIHAN, GEOGRAPHY A Spatial Analysis of Kansas Farm Ponds Regression Modeling and Outlier Detection Small Reservoirs (ponds...

  17. Multicriteria Spatial Price Networks: Statics and Dynamics

    E-Print Network [OSTI]

    Nagurney, Anna

    Multicriteria Spatial Price Networks: Statics and Dynamics Anna Nagurney Department of Finance: In this paper, we develop a spatial price network equilibrium model in which consumers at the demand markets commodity. We provide the governing equilibrium conditions for the multicriteria spatial price problem

  18. Spatial periphery of lithium isotopes

    SciTech Connect (OSTI)

    Galanina, L. I., E-mail: galan_lidiya@mail.ru; Zelenskaja, N. S. [Moscow State University, Skobeltsyn Institute of Nuclear Physics (Russian Federation)

    2013-12-15

    The spatial structure of lithium isotopes is studied with the aid of the charge-exchange and (t, p) reactions on lithium nuclei. It is shown that an excited isobaric-analog state of {sup 6}Li (0{sup +}, 3.56MeV) has a halo structure formed by a proton and a neutron, that, in the {sup 9}Li nucleus, there is virtually no neutron halo, and that {sup 11}Li is a Borromean nucleus formed by a {sup 9}Li core and a two-neutron halo manifesting itself in cigar-like and dineutron configurations.

  19. An Intelligent System For Effective Forest Fire Detection Using Spatial Data

    E-Print Network [OSTI]

    Angayarkkani, K

    2010-01-01

    The explosive growth of spatial data and extensive utilization of spatial databases emphasize the necessity for the automated discovery of spatial knowledge. In modern times, spatial data mining has emerged as an area of voluminous research. Forest fires are a chief environmental concern, causing economical and ecological damage while endangering human lives across the world. The fast or early detection of forest fires is a vital element for controlling such phenomenon. The application of remote sensing is at present a significant method for forest fires monitoring, particularly in vast and remote areas. Different methods have been presented by researchers for forest fire detection. The motivation behind this research is to obtain beneficial information from images in the forest spatial data and use the same in the determination of regions at the risk of fires by utilizing Image Processing and Artificial Intelligence techniques. This paper presents an intelligent system to detect the presence of forest fires ...

  20. ANDI~E TRETIAKOFF RESULTS OBTAINED WITH A NEW METHOD

    E-Print Network [OSTI]

    as it is based on a preliminary knowledge of the language. We will show later how the results of the analysis can are suppressed. We will call now "words" these symbols. 2. DICTIONARY OF STRINGS The second step . . . . . . . . . . . . . . . . . . . 85 04 Each string is obtained by suppressing the first word ·ing string. of the preced- #12;AUTOMATIC

  1. Brain Mapping Using Topology Graphs Obtained by Surface Segmentation

    E-Print Network [OSTI]

    Linsen, Lars

    Brain Mapping Using Topology Graphs Obtained by Surface Segmentation Fabien Vivodtzev1 , Lars@ucdavis.edu Summary. Brain mapping is a technique used to alleviate the tedious and time- consuming process of annotating brains by mapping existing annotations from brain atlases to individual brains. We introduce

  2. Ph.D. Thesis defended to obtain the

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    traditional communication systems by more human oriented solutions based on virtual reality technology Facial animation has become an active research topic in telecommunications. This field aims at replacing from monocular video sequences. The obtained motion data are suitable to animate the realistic head

  3. Microstructured Porous Silica Obtained via Colloidal Crystal Templates

    E-Print Network [OSTI]

    Velev, Orlin D.

    Microstructured Porous Silica Obtained via Colloidal Crystal Templates O. D. Velev,* T. A. Jede, R modified colloidal crystals as templates for silica polymerization is reported. 3D close-packed crystals, representing a negative replica of the original colloidal crystal. The size of the pores can be controlled

  4. Hydrodesulfurization and hydrodenitrogenation catalysts obtained from coal mineral matter

    DOE Patents [OSTI]

    Liu, Kindtoken H. D. (Newark, DE); Hamrin, Jr., Charles E. (Lexington, KY)

    1982-01-01

    A hydrotreating catalyst is prepared from coal mineral matter obtained by low temperature ashing coals of relatively low bassanite content by the steps of: (a) depositing on the low temperature ash 0.25-3 grams of an iron or nickel salt in water per gram of ash and drying a resulting slurry; (b) crushing and sizing a resulting solid; and (c) heating the thus-sized solid powder in hydrogen.

  5. Disaggregation of spatial rainfall fields for hydroloigcal modelling Hydrology and Earth System Sciences, 5(2), 165173 (2001) EGS

    E-Print Network [OSTI]

    Boyer, Edmond

    2001-01-01

    to investigate the evolution of the climate (DOE, 1996) while at the regional scale, mesoscale models are weather. In the case of rainfall forecasting, some combination of the mesoscale forecast and a finer scale advection

  6. Future Directions in Spatial Demography, Final Report

    E-Print Network [OSTI]

    Matthews, Stephen A.; Janelle, Donald G.; Goodchild, Michael F.

    2012-01-01

    the meeting’s final reception. Future Directions in SpatialH. (2007) Five Minds for the Future. Cambridge, MA: Harvardhorizons, envisioning the future. Social Science and

  7. Designing a Language for Spatial Computing

    E-Print Network [OSTI]

    Kuhn, Werner; Ballatore, Andrea

    2015-01-01

    solar energy collection potentials as a test domain of spatial information, a typical resource consists of Shapefiles with detailed vector data

  8. How to obtain the National Energy Modeling System (NEMS)

    Reports and Publications (EIA)

    2013-01-01

    The National Energy Modeling System (NEMS) NEMS is used by the modelers at the U. S. Energy Information Administration (EIA) who understand its structure and programming. NEMS has only been used by a few organizations outside of the EIA, because most people that requested NEMS found out that it was too difficult or rigid to use. NEMS is not typically used for state-level analysis and is poorly suited for application to other countries. However, many do obtain the model simply to use the data in its input files or to examine the source code.

  9. Criticality of environmental information obtainable by dynamically controlled quantum probes

    E-Print Network [OSTI]

    Analia Zwick; Gonzalo A. Alvarez; Gershon Kurizki

    2015-09-22

    A universal approach to decoherence control combined with quantum estimation theory reveals a critical behavior, akin to a phase transition, of the information obtainable by a qubit probe concerning the memory time of environmental fluctuations. This criticality emerges only when the probe is subject to dynamical control. It gives rise to a sharp transition between two dynamical phases characterized by either a short or long memory time compared to the probing time. This phase-transition of the environmental information is a fundamental feature that facilitates the attainment of the highest estimation precision of the environment memory-time and the characterization of probe dynamics.

  10. Spatial and temporal resolution of fluid flows: LDRD final report

    SciTech Connect (OSTI)

    Tieszen, S.R.; O`Hern, T.J.; Schefer, R.W.; Perea, L.D.

    1998-02-01

    This report describes a Laboratory Directed Research and Development (LDRD) activity to develop a diagnostic technique for simultaneous temporal and spatial resolution of fluid flows. The goal is to obtain two orders of magnitude resolution in two spatial dimensions and time simultaneously. The approach used in this study is to scale up Particle Image Velocimetry (PIV) and Planar Laser Induced Fluorescence (PLIF) to acquire meter-size images at up to 200 frames/sec. Experiments were conducted in buoyant, fully turbulent, non-reacting and reacting plumes with a base diameter of one meter. The PIV results were successful in the ambient gas for all flows, and in the plume for non-reacting helium and reacting methane, but not reacting hydrogen. No PIV was obtained in the hot combustion product region as the seed particles chosen vaporized. Weak signals prevented PLIF in the helium. However, in reacting methane flows, PLIF images speculated to be from Poly-Aromatic-Hydrocarbons were obtained which mark the flame sheets. The results were unexpected and very insightful. A natural fluorescence from the seed particle vapor was also noted in the hydrogen tests.

  11. Hybrid nuclear reactor grey rod to obtain required reactivity worth

    DOE Patents [OSTI]

    Miller, John V. (Munhall, PA); Carlson, William R. (Scott Township, Allegheny County, PA); Yarbrough, Michael B. (Hempfield Township, Westmoreland County, PA)

    1991-01-01

    Hybrid nuclear reactor grey rods are described, wherein geometric combinations of relatively weak neutron absorber materials such as stainless steel, zirconium or INCONEL, and relatively strong neutron absorber materials, such as hafnium, silver-indium cadmium and boron carbide, are used to obtain the reactivity worths required to reach zero boron change load follow. One embodiment includes a grey rod which has combinations of weak and strong neutron absorber pellets in a stainless steel cladding. The respective pellets can be of differing heights. A second embodiment includes a grey rod with a relatively thick stainless steel cladding receiving relatively strong neutron absorber pellets only. A third embodiment includes annular relatively weak netron absorber pellets with a smaller diameter pellet of relatively strong absorber material contained within the aperture of each relatively weak absorber pellet. The fourth embodiment includes pellets made of a homogeneous alloy of hafnium and a relatively weak absorber material, with the percentage of hafnium chosen to obtain the desired reactivity worth.

  12. TeachSpatial: A Portal to Instructional Resources on Spatial Concepts for STEM Education, Final Report

    E-Print Network [OSTI]

    Janelle, Donald G.; Grossner, Karl; Lenaburg, Lubella

    2012-01-01

    the TeachSpatial NSDL resource portal III. Phase Three Building a spatial web portal A. Technical integration with Benchmarks II. The Web Portal A PPENDIX  A—S URVEY  R

  13. Fostering a Spatially Literate Generation: Explicit Instruction in Spatial Thinking for Preservice Teachers 

    E-Print Network [OSTI]

    Jo, Injeong

    2012-02-14

    was developed as the intervention of this study. The primary focus of the workshop was to provide an explicit opportunity to learn about spatial thinking and to practice skills required to incorporate spatial thinking into participants' classrooms. Three...

  14. Spatialization Spatialization is the transformation of high-dimensional data into lower-dimensional, geometric

    E-Print Network [OSTI]

    Skupin, André

    Spatialization Spatialization is the transformation of high-dimensional data into lower of traditional visual transformations developed largely within cartography can powerfully support involving dozens of attributes. Stock market analysts stand to gain from noticing unusual market movements

  15. Spatial Data Mining, Michael May, Fraunhofer AIS 1 Spatial Data Mining for Customer

    E-Print Network [OSTI]

    Morik, Katharina

    Spatial Data Mining, Michael May, Fraunhofer AIS 1 Spatial Data Mining for Customer Segmentation Data Mining in Practice Seminar, Dortmund, 2003 Dr. Michael May Fraunhofer Institut Autonome Intelligente Systeme #12;Spatial Data Mining, Michael May, Fraunhofer AIS 2 Introduction: a classic example

  16. Spatial mode properties of plasmon assisted transmission

    E-Print Network [OSTI]

    Xi-Feng Ren; Guo-Ping Guo; Yun-Feng Huang; Zhi-Wei Wang; Guang-Can Guo

    2006-09-11

    Orbital angular momentum of photons is explored to study the spatial mode properties of plasmon assisted transmission process. We found that photons carrying different orbital angular momentums have different transmission efficiencies, while the coherence between these spatial modes can be preserved.

  17. Exporting Spatial Externalities Andrew J. Cassey

    E-Print Network [OSTI]

    Keywords: agglomeration, exports, distance, spatial econometrics,Russia Cassey: cassey@wsu.edu; 101 HulbertExporting Spatial Externalities Andrew J. Cassey School of Economic Sciences Washington State of externalities generated by neighbors' ex- ports on place-level exports, explicitly modeling the distance

  18. Spatial Data Types: Conceptual Foundation for

    E-Print Network [OSTI]

    Güting, Ralf Hartmut

    are necessary to model geometry and to suitably represent geometric data in data- base systems. These data types. Their definition is to a large degree responsible for a successful design of spatial data models-oriented, or some other kind of data model. Hence, the definition and implementation of spatial data types

  19. A Statistical Framework for Spatial Comparative Genomics

    E-Print Network [OSTI]

    A Statistical Framework for Spatial Comparative Genomics Rose Hoberman May 2007 CMU-CS-07, or the U.S. Government. #12;Keywords: spatial comparative genomics, comparative genomics, gene clusters, max-gap clusters, gene teams, whole genome duplication, paralogons, synteny, ortholog detection #12

  20. Building Analysis from a Spatial Cognition Perspective

    E-Print Network [OSTI]

    Building Analysis from a Spatial Cognition Perspective Georg Vrachliotis 1 , Christoph Hölscher 2 on the application of concepts and methods of Spatial Cognition to building analysis. We investigate the close comments and behavioral data. Based on an empirical study in a complex multi-level-building two main aspect

  1. SPATIAL CLIMATE CHANGE VULNERABILITY ASSESSMENTS: A REVIEW

    E-Print Network [OSTI]

    Columbia University

    SPATIAL CLIMATE CHANGE VULNERABILITY ASSESSMENTS: A REVIEW OF DATA, METHODS, AND ISSUES AUGUST 2014: A Review of Data, Methods, and Issues i SPATIAL CLIMATE CHANGE VULNERABILITY ASSESSMENTS: A REVIEW OF DATA Climate Change Vulnerability Assessments: A Review of Data, Methods, and Issues ii TABLE OF CONTENTS

  2. Mass and the creation of spatial volume

    E-Print Network [OSTI]

    C. L. Herzenberg

    2011-05-13

    The distortion of space by the presence of mass in general relativity appears to be capable of increasing three dimensional spatial volume. We examine excess volume effects associated with an isolated mass described by the Schwarzschild solution to the field equations. Fractional differential excess spatial volume in the vicinity of a mass is shown to be a direct measure of gravitational potential which can be easily visualized. The total amount of excess spatial volume associated with an isolated mass is evaluated and shown to be appreciable. Summing over the excess spatial volume contributions from individual masses present throughout the universe leads to an overall excess spatial volume comparable in magnitude to the volume of the observable universe. Interpretations of these results are discussed, including the possibility that this excess volume might contribute to clarifying the issue of missing matter in the contemporary universe. Alternatively, it is proposed speculatively that mass, rather than simply distorting preexisting space, might actually create it.

  3. TI: Can coarse surface layers in gravel-bedded rivers be mobilized by finer gravel bedload?

    E-Print Network [OSTI]

    Nelson, Peter

    are depleted from upstream reaches. Coarse, degraded river reaches are commonly observed downstream of dams across the Western United States. Following dam closure, these riverbeds become immobile under the surface and bedload. Pulses composed of the fine tail of the surface grain size distribution are capable

  4. FeaFiner: Biomarker Identification from Medical Data through Feature Generalization and Selection

    E-Print Network [OSTI]

    Lu, Zhaosong

    .J. Watson Research Center, Yorktown Heights, NY ABSTRACT Traditionally, feature construction and feature-convexity objective and non-smoothness penal- ties. We apply a recently developed augmented Lagrangian method to solve this formulation in which each subprob- lem is solved by a non-monotone spectral projected gradi- ent method. Our

  5. Finite quantum dissipation: the challenge of obtaining specific heat

    E-Print Network [OSTI]

    Peter Hänggi; Gert-Ludwig Ingold; Peter Talkner

    2008-05-26

    We consider a free particle coupled with finite strength to a bath and investigate the evaluation of its specific heat. A harmonic oscillator bath of Drude type with cutoff frequency omega_D is employed to model an ohmic friction force with dissipation strength gamma. Two scenarios for obtaining specific heat are presented. The first one uses the measurement of the kinetic energy of the free particle while the second one is based on the reduced partition function. Both descriptions yield results which are consistent with the Third Law of thermodynamics. Nevertheless, the two methods produce different results that disagree even in their leading quantum corrections at high temperatures. We also consider the regime where the cutoff frequency is smaller than the friction strength, i.e. omega_Dspecific heat based on the thermodynamic prescription becomes negative. This anomaly is rooted in an ill-defined density of states of the damped free particle which assumes unphysical negative values when gamma/omega_D>1.

  6. Noise correction of turbulent spectra obtained from Acoustic Doppler Velocimeters

    SciTech Connect (OSTI)

    Durgesh, Vibhav; Thomson, Jim; Richmond, Marshall C.; Polagye, Brian

    2014-03-02

    Accurately estimated auto-spectral density functions are essential for characterization of turbulent flows, and they also have applications in computational fluid dynamics modeling, site and inflow characterization for hydrokinetic turbines, and inflow turbulence generation. The Acoustic Doppler Velocimeter (ADV) provides single-point temporally resolved data, that are used to characterize turbulent flows in rivers, seas, and oceans. However, ADV data are susceptible to contamination from various sources, including instrument noise, which is the intrinsic limit to the accuracy of acoustic velocity measurements. Due to the presence of instrument noise, the spectra obtained are altered at high frequencies. The focus of this study is to develop a robust and effective method for accurately estimating auto-spectral density functions from ADV data by reducing or removing the spectral contribution derived from instrument noise. For this purpose, the “Noise Auto-Correlation” (NAC) approach was developed, which exploits the correlation properties of instrument noise to identify and remove its contribution from spectra. The spectra estimated using the NAC approach exhibit increased fidelity and a slope of -5/3 in the inertial range, which is typically observed for turbulent flows. Finally, this study also compares the effectiveness of low-pass Gaussian filters in removing instrument noise with that of the NAC approach. For the data used in this study, both the NAC and Gaussian filter approaches are observed to be capable of removing instrument noise at higher frequencies from the spectra. However, the NAC results are closer to the expected frequency power of -5/3 in the inertial sub-range.

  7. Assessing spatial variability of soil water content through Thermal Inertia and NDVI

    E-Print Network [OSTI]

    Poggi, Davide

    Assessing spatial variability of soil water content through Thermal Inertia and NDVI Pierluigi of the soil/canopy water content at the short time-scale. This is obtained by means of an indirect approach monitoring (McVicar and Jupp, 1998)3 or for the management of water resources in wide irrigation schemes

  8. BUILDING DETECTION USING DIRECTIONAL SPATIAL CONSTRAINTS H. Gokhan Akcay, Selim Aksoy

    E-Print Network [OSTI]

    Aksoy, Selim

    BUILDING DETECTION USING DIRECTIONAL SPATIAL CONSTRAINTS H. G¨okhan Akc¸ay, Selim Aksoy Department,saksoy}@cs.bilkent.edu.tr ABSTRACT We propose an algorithm for automatic detection of buildings with complex shapes and roof is obtained. Then, candidate building regions are found using shadow and sun azimuth angle information. Fi

  9. Spatial migration of earthquakes within seismic clusters in Southern California: Evidence for fluid diffusion

    E-Print Network [OSTI]

    Abercrombie, Rachel E.

    Spatial migration of earthquakes within seismic clusters in Southern California: Evidence for fluid to migrate slowly with time, which may reflect event triggering due to slow fault slip or fluid flow. We event migration within 69 previously observed seismicity bursts. We obtain best-fitting migration

  10. Spatialization: Spatial Metaphors and Methods for Handling Non-Spatial Data Submitted by UCGIS member institution University of California Santa Barbara, Department of Geography

    E-Print Network [OSTI]

    Fabrikant, Sara Irina

    as a GIScience priority will encourage the infusion of GIScience expertise into spatialization resea

  11. ReportSiberia : deconstructing spatialized ideologies

    E-Print Network [OSTI]

    Strobel, Eva Christine

    2011-01-01

    The Siberian condition is an exaggerated one with many layers: its history of settlement created unconventional spatial conditions that are emphasized by extreme geography and climate. Observations from a visit describe ...

  12. Spatial variation decomposition via sparse regression

    E-Print Network [OSTI]

    Zhang, Wangyang

    In this paper, we briefly discuss the recent development of a novel sparse regression technique that aims to accurately decompose process variation into two different components: (1) spatially correlated variation, and (2) ...

  13. Spatial dispersion of multilayer fishnet metamaterials

    E-Print Network [OSTI]

    Spatial dispersion of multilayer fishnet metamaterials Sergey S. Kruk, David A. Powell, Alexander the anisotropic properties of multilayer fishnet optical metamaterials and describe topological transitions fishnet metamaterials may have negative components not only in the effective permittivity tensor but also

  14. Spatial Scaling of Land Cover Networks

    E-Print Network [OSTI]

    Small, Christopher

    2015-01-01

    Spatial networks of land cover are well-described by power law rank-size distributions. Continuous field proxies for human settlements, agriculture and forest cover have similar spatial scaling properties spanning 4 to 5 orders of magnitude. Progressive segmentation of these continuous fields yields spatial networks with rank-size distributions having slopes near -1 for a wide range of thresholds. We consider a general explanation for this scaling that does not require different processes for each type of land cover. The same conditions that give rise to scale-free networks in general can produce power law distributions of component sizes for bounded spatial networks confined to a plane or surface. Progressive segmentation of a continuous field naturally results in growth of the network while the increasing perimeters of the growing components result in preferential attachment to the larger components with the longer perimeters. Progressive segmentation of two types of random continuous field results in progr...

  15. Nonparametric methods of assessing spatial isotropy 

    E-Print Network [OSTI]

    Guan, Yong Tao

    2004-11-15

    A common requirement for spatial analysis is the modeling of the second-order structure. While the assumption of isotropy is often made for this structure, it is not always appropriate. A conventional practice to check for ...

  16. Scalable spatially aware media sharing display system

    E-Print Network [OSTI]

    Menard, Patrick, 1981-

    2004-01-01

    The scalable spatially aware media sharing display system provides an efficient and convenient means of harnessing media messaging in global communications. A three- tiered system of input, control, and output creates a ...

  17. Spatial Concepts in GIS and Design, Agenda

    E-Print Network [OSTI]

    Center for Spatial Studies, UCSB; National Center for Geographic Information and Analysis; Esri

    2008-01-01

    Meeting on Spatial Concepts in GIS and Design Santa Barbara,design more fully into GIS, and over the development ofconcepts that lie behind GIS relevant in design?" or "To

  18. SPATIAL DATABASE MODELING WITH PICTOGRAMMIC LANGUAGES Yvan Bdard, Suzie Larrive

    E-Print Network [OSTI]

    SPATIAL DATABASE MODELING WITH PICTOGRAMMIC LANGUAGES Yvan Bédard, Suzie Larrivée Dept of Geomatics Sciences Centre for Research in Geomatics Canada NSERC Industrial Research Chair in Geospatial Databases language extension, Spatial data modeling, Perceptory pictograms. DEFINITION "Spatial databases" consist

  19. Menstrual cycle effects on spatial location tasks 

    E-Print Network [OSTI]

    Andrew, Sarah

    2013-02-22

    abilities (Halpem, 1992; Voyer et al. , 1995). However, there is one spatial ability test where women demonstrate an advantage over men. This female advantage spatial ability is known as spaflal location memory (Eals & Silvermen, 1994; Silverman & Eals..., Mock & Erbaugh, 1961) and a brief daily diary, which recorded subjective moods (i. e. , anxiety, sadness, anger, happiness, and energy level). The participants recorded their daily moods in the daily diary by marking a spot on a 10 cm visual analogue...

  20. Spatial localization of resistive drift wave structure in tokamak...

    Office of Scientific and Technical Information (OSTI)

    Spatial localization of resistive drift wave structure in tokamak edge plasmas with an embedded magnetic island Citation Details In-Document Search Title: Spatial localization of...

  1. Radiochromic Film Measurement of Spatial Uniformity for a Laser...

    Office of Scientific and Technical Information (OSTI)

    Radiochromic Film Measurement of Spatial Uniformity for a Laser Generated X-ray Environment Citation Details In-Document Search Title: Radiochromic Film Measurement of Spatial...

  2. Spatial structure of a collisionally inhomogeneous Bose-Einstein...

    Office of Scientific and Technical Information (OSTI)

    Spatial structure of a collisionally inhomogeneous Bose-Einstein condensate Citation Details In-Document Search Title: Spatial structure of a collisionally inhomogeneous...

  3. Spatial atomic layer deposition on flexible substrates using...

    Office of Scientific and Technical Information (OSTI)

    Spatial atomic layer deposition on flexible substrates using a modular rotating cylinder reactor Citation Details In-Document Search Title: Spatial atomic layer deposition on...

  4. The Sensitivity of DPF Performance to the Spatial Distribution...

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

    The Sensitivity of DPF Performance to the Spatial Distribution of Ash Generated from Six Lubricant Formulations The Sensitivity of DPF Performance to the Spatial Distribution of...

  5. Computation of the spectrum of spatial Lyapunov exponents for the spatially extended beam-plasma systems and electron-wave devices

    SciTech Connect (OSTI)

    Hramov, Alexander E. [Faculty of Nonlinear Processes, Saratov State University, Astrakhanskaya str., 83, Saratov 410012 (Russian Federation); Saratov State Technical University, Politechnicheskaja str., 77, Saratov 410054 (Russian Federation); Koronovskii, Alexey A.; Maximenko, Vladimir A.; Moskalenko, Olga I. [Faculty of Nonlinear Processes, Saratov State University, Astrakhanskaya str., 83, Saratov 410012 (Russian Federation)

    2012-08-15

    The spectrum of Lyapunov exponents is powerful tool for the analysis of the complex system dynamics. In the general framework of nonlinear dynamics, a number of the numerical techniques have been developed to obtain the spectrum of Lyapunov exponents for the complex temporal behavior of the systems with a few degree of freedom. Unfortunately, these methods cannot be applied directly to analysis of complex spatio-temporal dynamics of plasma devices which are characterized by the infinite phase space, since they are the spatially extended active media. In the present paper, we propose the method for the calculation of the spectrum of the spatial Lyapunov exponents (SLEs) for the spatially extended beam-plasma systems. The calculation technique is applied to the analysis of chaotic spatio-temporal oscillations in three different beam-plasma model: (1) simple plasma Pierce diode, (2) coupled Pierce diodes, and (3) electron-wave system with backward electromagnetic wave. We find an excellent agreement between the system dynamics and the behavior of the spectrum of the spatial Lyapunov exponents. Along with the proposed method, the possible problems of SLEs calculation are also discussed. It is shown that for the wide class of the spatially extended systems, the set of quantities included in the system state for SLEs calculation can be reduced using the appropriate feature of the plasma systems.

  6. TeachSpatial: A Portal to Instructional Resources on Spatial Concepts for STEM Education, Proposal

    E-Print Network [OSTI]

    Janelle, Donald G.; Grossner, Karl

    2010-01-01

    of science: A geographic portal. Annals of the Association2010    TeachSpatial: A Portal to Instructional Resources enhance an existing web portal (http://teachspatial.org) by

  7. Future geodesic completeness of some spatially homogeneous solutions of the vacuum Einstein equations in higher dimensions

    E-Print Network [OSTI]

    Arne Goedeke; Alan D. Rendall

    2010-02-21

    It is known that all spatially homogeneous solutions of the vacuum Einstein equations in four dimensions which exist for an infinite proper time towards the future are future geodesically complete. This paper investigates whether the analogous statement holds in higher dimensions. A positive answer to this question is obtained for a large class of models which can be studied with the help of Kaluza-Klein reduction to solutions of the Einstein-scalar field equations in four dimensions. The proof of this result makes use of a criterion for geodesic completeness which is applicable to more general spatially homogeneous models.

  8. Integrating Brain Data Spatially: Spatial Data Infrastructure and Atlas Environment for Online

    E-Print Network [OSTI]

    Gupta, Amarnath

    Integrating Brain Data Spatially: Spatial Data Infrastructure and Atlas Environment for Online Federation and Analysis of Brain Images Ilya Zaslavsky1 , Haiyun He2 , Joshua Tran1 , Maryann E. Martone2 Numerous digital atlases of the brain have been developed for different species through the efforts

  9. Optical vortex array in spatially varying lattice

    E-Print Network [OSTI]

    Kapoor, Amit; Senthilkumaran, P; Joseph, Joby

    2015-01-01

    We present an experimental method based on a modified multiple beam interference approach to generate an optical vortex array arranged in a spatially varying lattice. This method involves two steps which are: numerical synthesis of a consistent phase mask by using two-dimensional integrated phase gradient calculations and experimental implementation of produced phase mask by utilizing a phase only spatial light modulator in an optical 4f Fourier filtering setup. This method enables an independent variation of the orientation and period of the vortex lattice. As working examples, we provide the experimental demonstration of various spatially variant optical vortex lattices. We further confirm the existence of optical vortices by formation of fork fringes. Such lattices may find applications in size dependent trapping, sorting, manipulation and photonic crystals.

  10. Measuring spatial variability in soil characteristics

    DOE Patents [OSTI]

    Hoskinson, Reed L. (Rigby, ID); Svoboda, John M. (Idaho Falls, ID); Sawyer, J. Wayne (Hampton, VA); Hess, John R. (Ashton, ID); Hess, J. Richard (Idaho Falls, ID)

    2002-01-01

    The present invention provides systems and methods for measuring a load force associated with pulling a farm implement through soil that is used to generate a spatially variable map that represents the spatial variability of the physical characteristics of the soil. An instrumented hitch pin configured to measure a load force is provided that measures the load force generated by a farm implement when the farm implement is connected with a tractor and pulled through or across soil. Each time a load force is measured, a global positioning system identifies the location of the measurement. This data is stored and analyzed to generate a spatially variable map of the soil. This map is representative of the physical characteristics of the soil, which are inferred from the magnitude of the load force.

  11. Statistical Physics of the Spatial Prisoner's Dilemma

    E-Print Network [OSTI]

    Javarone, Marco Alberto

    2015-01-01

    We introduce an analytical model to study the evolution towards equilibrium in spatial games. In particular, we focus our attention on the spatial Prisoner's Dilemma, as it constitutes an emblematic example of a game whose Nash equilibrium is defection. Previous investigations showed that, under opportune conditions, it is possible to reach, in the evolutionary Prisoner's Dilemma, an equilibrium of cooperation. Notably, it seems that mechanisms like motion may lead a population to become cooperative. In the proposed model, we map agents to particles of a gas so that, on varying the system temperature, they randomly move. In doing so, we are able to identify a relation between the temperature and the final equilibrium of the population, explaining how it is possible to break the classical Nash equilibrium in the spatial Prisoner's Dilemma. Moreover, we introduce a formalism to study order-disorder phase transitions in these dynamics. As result, we highlight that the proposed model allows to explain analyticall...

  12. Emergence of spatial structure from causal sets

    E-Print Network [OSTI]

    David Rideout; Petros Wallden

    2009-04-30

    There are numerous indications that a discrete substratum underlies continuum spacetime. Any fundamentally discrete approach to quantum gravity must provide some prescription for how continuum properties emerge from the underlying discreteness. The causal set approach, in which the fundamental relation is based upon causality, finds it easy to reproduce timelike distances, but has a more difficult time with spatial distance, due to the unique combination of Lorentz invariance and discreteness within that approach. We describe a method to deduce spatial distances from a causal set. In addition, we sketch how one might use an important ingredient in deducing spatial distance, the `$n$-link', to deduce whether a given causal set is likely to faithfully embed into a continuum spacetime.

  13. Spatial network surrogates for disentangling complex system structure from spatial embedding of nodes

    E-Print Network [OSTI]

    Wiedermann, Marc; Kurths, Jürgen; Donner, Reik V

    2015-01-01

    Networks with nodes embedded in a metric space have gained increasing interest in recent years. The effects of spatial embedding on the networks' structural characteristics, however, are rarely taken into account when studying their macroscopic properties. Here, we propose a hierarchy of null models to generate random surrogates from a given spatially embedded network that can preserve global and local statistics associated with the nodes' embedding in a metric space. Comparing the original network's and the resulting surrogates' global characteristics allows to quantify to what extent these characteristics are already predetermined by the spatial embedding of the nodes and links. We apply our framework to various real-world spatial networks and show that the proposed models capture macroscopic properties of the networks under study much better than standard random network models that do not account for the nodes' spatial embedding. Depending on the actual performance of the proposed null models, the networks...

  14. TECHNOLOGIES AND STANDARDS ON SPATIAL DATA SHARING Jianya Gong1

    E-Print Network [OSTI]

    sharing and introduces the technical and standardization systems for spatial data sharing. 1. INTRODUCTIONTECHNOLOGIES AND STANDARDS ON SPATIAL DATA SHARING Jianya Gong1 , Lite Shi1 , Daosheng Du1 , Rolf A KEY WORDS: Spatial data, Sharing, Interoperability, Standards ABSTRACT: The issue of geo-spatial data

  15. Spatial Augmented Reality Support for Design of Complex Physical Environments

    E-Print Network [OSTI]

    Thomas, Bruce

    , and animations) and the physical space (physical prototypes and 3D printing). Spatial Augmented Reality (SAR

  16. Spatial Relationship between Solar Flares and Coronal Mass Ejections

    E-Print Network [OSTI]

    S. Yashiro; G. Michalek; S. Akiyama; N. Gopalswamy; R. A. Howard

    2007-10-16

    We report on the spatial relationship between solar flares and coronal mass ejections (CMEs) observed during 1996-2005 inclusive. We identified 496 flare-CME pairs considering limb flares (distance from central meridian > 45 deg) with soft X-ray flare size > C3 level. The CMEs were detected by the Large Angle and Spectrometric Coronagraph (LASCO) on board the Solar and Heliospheric Observatory (SOHO). We investigated the flare positions with respect to the CME span for the events with X-class, M-class, and C-class flares separately. It is found that the most frequent flare site is at the center of the CME span for all the three classes, but that frequency is different for the different classes. Many X-class flares often lie at the center of the associated CME, while C-class flares widely spread to the outside of the CME span. The former is different from previous studies, which concluded that no preferred flare site exists. We compared our result with the previous studies and conclude that the long-term LASCO observation enabled us to obtain the detailed spatial relation between flares and CMEs. Our finding calls for a closer flare-CME relationship and supports eruption models typified by the CSHKP magnetic reconnection model.

  17. Spatial Modulation and Conductivities in Effective Holographic Theories

    E-Print Network [OSTI]

    Mukund Rangamani; Moshe Rozali; Darren Smyth

    2015-08-02

    We analyze a class of bottom-up holographic models for low energy thermo-electric transport. The models we focus on belong to a family of Einstein-Maxwell-dilaton theories parameterized by two scalar functions, characterizing the dilaton self-interaction and the gauge coupling function. We impose spatially inhomogeneous lattice boundary conditions for the dilaton on the AdS boundary and study the resulting phase structure attained at low energies. We find that as we dial the scalar functions at our disposal (changing thus the theory under consideration), we obtain either (i) coherent metallic, or (ii) insulating, or (iii) incoherent metallic phases. We chart out the domain where the incoherent metals appear in a restricted parameter space of theories. We also analyze the optical conductivity, noting that non-trivial scaling behaviour at intermediate frequencies appears to only be possible for very narrow regions of parameter space.

  18. Spatial Data Structures Spatial data structures describe the rules that are used to represent geographic data in geographic

    E-Print Network [OSTI]

    Stock, Kristin

    Spatial Data Structures Spatial data structures describe the rules that are used to represent are represented in a database management system (for example, as database tables). · Spatial data structures. Spatial data structures are the core of a GIS and fundamentally affect its performance and capabilities

  19. Spatial Sciences Program University of Southern California

    E-Print Network [OSTI]

    Zhou, Xianghong Jasmine

    information. These views of the world are supported by Geographic Information Systems (GIS) and the related constitutes a Geographic Information System and how they would know one if they saw it; and Explain how: PRINCIPLES OF GEOGRAPHIC INFORMATION SCIENCE Spring Semester 2014 1. Introduction The spatial sciences focus

  20. GIS, SPATIAL STATISTICAL GRAPHICS, AND FOREST HEALTH.

    E-Print Network [OSTI]

    Symanzik, Jürgen

    1 GIS, SPATIAL STATISTICAL GRAPHICS, AND FOREST HEALTH. James J. Majure, Noel Cressie, Dianne Cook, and Jürgen Symanzik ABSTRACT This paper discusses the use of a geographic information systems (GIS), Arcview, into a geographic information system (GIS), Arcview 2.1 (ESRI 1995), and its use in the statistical analysis of spa

  1. Regulation mechanisms in spatial stochastic development models

    E-Print Network [OSTI]

    Dmitri Finkelshtein; Yuri Kondratiev

    2008-09-04

    The aim of this paper is to analyze different regulation mechanisms in spatial continuous stochastic development models. We describe the density behavior for models with global mortality and local establishment rates. We prove that the local self-regulation via a competition mechanism (density dependent mortality) may suppress a unbounded growth of the averaged density if the competition kernel is superstable.

  2. Lithographically Patterned Channels Spatially Segregate Kinesin Motor

    E-Print Network [OSTI]

    Hancock, William O.

    Lithographically Patterned Channels Spatially Segregate Kinesin Motor Activity and Effectively Received March 25, 2003 ABSTRACT To extract useful work from biological motor proteins, it is necessary microfabrication to construct 1.5-µm-deep channels in SU-8 photoresist patterned on glass. Although motor proteins

  3. The Computational Fundamentals of Spatial Cycloidal Gearing

    E-Print Network [OSTI]

    Nawratil, Georg

    The Computational Fundamentals of Spatial Cycloidal Gearing Giorgio Figliolini, Universit`a degli 2. Reuleaux's principle of gearing in the plane 3. Reuleaux's principle of gearing in 3-space 4. Consequences for skew gearing 5. Conclusion Computational Kinematics 2009, May 6­9, Duisburg/Germany 1 #12

  4. The Computational Fundamentals of Spatial Cycloidal Gearing

    E-Print Network [OSTI]

    Nawratil, Georg

    The Computational Fundamentals of Spatial Cycloidal Gearing Giorgio Figliolini, Hellmuth Stachel and Jorge Angeles Abstract The tooth flanks of bevel gears with involute teeth are still cut using known. The modeling of the tooth flanks of gears with skew axes, however, still represents a challenge

  5. An electronically addressed spatial light modulator 

    E-Print Network [OSTI]

    McKnight, Douglas J

    pixelated binary spatial light modulator operating in reflection. Each pixel contains a memory element which stores the programmed logical state of the pixel. The addressing and pixel circuits were fabricated in a 1.5m nMOS technology on a 10 mm square chip...

  6. Knowledge Discovery in Spatial Databases Martin Ester

    E-Print Network [OSTI]

    Ester, Martin

    and their interactions with each other. Most companies, governmental agencies and scientific organizations use DBMS with ex­ isting DBMS. Thus, the second goal is to propose methods of efficiently supporting spatial data mining algorithms by a DBMS. Our approach centers around a new set of database primitives for mining

  7. Bayesian Analysis for Large Spatial Data 

    E-Print Network [OSTI]

    Park, Jincheol

    2012-10-19

    The Gaussian geostatistical model has been widely used in Bayesian modeling of spatial data. A core difficulty for this model is at inverting the n x n covariance matrix, where n is a sample size. The computational complexity of matrix inversion...

  8. Spatial Inference of Nitrate Concentrations in Groundwater

    E-Print Network [OSTI]

    Woodard, Dawn B.

    Spatial Inference of Nitrate Concentrations in Groundwater DAWN B. WOODARD, ROBERT L. WOLPERT in groundwater over the mid-Atlantic states, using measurements gathered during a pe- riod of ten years. A map- trations in air, pesticide concentrations in groundwater, or any other quantity that varies over

  9. Spatial distribution maps for benthic communities

    E-Print Network [OSTI]

    of multivariate statistics. The object of the thesis is the preparation of maps depicting spatial distribution of geostatistics, image analysis and multivariate statistics in an appropriate data processing scheme has been would like to acknowledge the enthusiasm and energy provided by my marine biologist colleague and close

  10. Quantum Search on the Spatial Grid

    E-Print Network [OSTI]

    Matthew Falk

    2013-03-18

    This paper explores Quantum Search on the two dimensional spatial grid. Recent exploration into the topic has devised a solution that runs in O(sqrt(n*ln(n))). This paper explores a new algorithm that gives promise for the O(sqrt(n)) result that is the lower bound off of the grid.

  11. Digital spatially incoherent Fresnel holography Joseph Rosen*

    E-Print Network [OSTI]

    Rosen, Joseph

    Digital spatially incoherent Fresnel holography Joseph Rosen* Department of Biology, Integrated, such that the result is a complex-valued Fresnel hologram. When this hologram is reconstructed in the computer, the 3D types of holograms,1,3­9 including Fourier1,4 and Fresnel holograms.5,6 The process of beam interfering

  12. Spatial properties of entangled photon pairs generated in nonlinear layered structures

    E-Print Network [OSTI]

    Jan Perina Jr

    2011-11-07

    A spatial quantum model of spontaneous parametric down-conversion in nonlinear layered structures is developed expanding the interacting vectorial fields into monochromatic plane waves. A two-photon spectral amplitude depending on the signal- and idler-field frequencies and propagation directions is used to derive transverse profiles of the emitted fields as well as their spatial correlations. Intensity spatial profiles and their spatial correlations are mainly determined by the positions of transmission peaks formed in these structures with photonic bands. A method for geometry optimization of the structures with respect to efficiency of the nonlinear process is suggested. Several structures composed of GaN/AlN layers are analyzed as typical examples. They allow the generation of photon pairs correlated in several emission directions. Photon-pair generation rates increasing better than the second power of the number of layers can be reached. Also structures efficiently generated photon pairs showing anti-bunching and anti-coalescence can be obtained. Three reasons for splitting the correlated area in photonic-band-gap structures are revealed: zig-zag movement of photons inside the structure, spatial symmetry and polarization-dependent properties. Also spectral splitting can be observed in these structures.

  13. General Methods for Syntheses MODIFY AS APPROPRIATE All chemicals were obtained from commercial suppliers and used

    E-Print Network [OSTI]

    Burgess, Kevin

    suppliers and used without further purification. Dichloromethane was obtained anhydrous by distillation over indicated. All chemicals were obtained from commercial suppliers and used without further purification. N2

  14. Probing the Room Temperature Spatial Distribution of Hydrogen in Nanoporous Carbon by Use of Small-Angle Neutron Scattering

    SciTech Connect (OSTI)

    Tsao, Cheng-Si [Massachusetts Institute of Technology (MIT); Li, Mingda [ORNL; Zhang, Yang [ORNL; Leao, Juscelino B [ORNL; Chiang, Wei-Shan [ORNL; Chung, Tsui-Yun [Institute of Nuclear Energy Research, Taiwan; Tzeng, Yi-Ren [Institute of Nuclear Energy Research, Taiwan; Chen, Sow-hsin H [ORNL

    2010-01-01

    The spatial distribution of hydrogen physically adsorbed in a nanoporous carbon at room temperature (RT) as a function of H2 gas pressure is investigated for the first time using small-angle neutron scattering (SANS). A hierarchical pore structure consisting of micropores and a fractal mesopore network of the used activated carbon is also studied to correlate the relationship between the spatial distribution of hydrogen and the pore confinement. The cylinder-like cluster of aggregated hydrogen is formed and is confined in the disklike micropore. The evolution of spatial structures of adsorbed hydrogen with hydrogen pressure is elucidated. A direct experimental observation of the spatial distribution and the behavior of hydrogen adsorbed in the porous materials at RT is still scarce to date. The analysis results obtained by SANS provide new information for the future investigations of the RT storage mechanism of hydrogen in the nanoporous materials developed for the purpose of on-board hydrogen storage.

  15. Cooperation percolation in spatial prisoner's dilemma game

    E-Print Network [OSTI]

    Yang, Han-Xin; Wang, Wen-Xu

    2015-01-01

    The paradox of cooperation among selfish individuals still puzzles scientific communities. Although a large amount of evidence has demonstrated that cooperator clusters in spatial games are effective to protect cooperators against the invasion of defectors, we continue to lack the condition for the formation of a giant cooperator cluster that assures the prevalence of cooperation in a system. Here, we study the dynamical organization of cooperator clusters in spatial prisoner's dilemma game to offer the condition for the dominance of cooperation, finding that a phase transition characterized by the emergence of a large spanning cooperator cluster occurs when the initial fraction of cooperators exceeds a certain threshold. Interestingly, the phase transition belongs to different universality classes of percolation determined by the temptation to defect $b$. Specifically, on square lattices, $1

  16. Multicriteria optimization of the spatial dose distribution

    SciTech Connect (OSTI)

    Schlaefer, Alexander; Viulet, Tiberiu; Muacevic, Alexander; Fürweger, Christoph

    2013-12-15

    Purpose: Treatment planning for radiation therapy involves trade-offs with respect to different clinical goals. Typically, the dose distribution is evaluated based on few statistics and dose–volume histograms. Particularly for stereotactic treatments, the spatial dose distribution represents further criteria, e.g., when considering the gradient between subregions of volumes of interest. The authors have studied how to consider the spatial dose distribution using a multicriteria optimization approach.Methods: The authors have extended a stepwise multicriteria optimization approach to include criteria with respect to the local dose distribution. Based on a three-dimensional visualization of the dose the authors use a software tool allowing interaction with the dose distribution to map objectives with respect to its shape to a constrained optimization problem. Similarly, conflicting criteria are highlighted and the planner decides if and where to relax the shape of the dose distribution.Results: To demonstrate the potential of spatial multicriteria optimization, the tool was applied to a prostate and meningioma case. For the prostate case, local sparing of the rectal wall and shaping of a boost volume are achieved through local relaxations and while maintaining the remaining dose distribution. For the meningioma, target coverage is improved by compromising low dose conformality toward noncritical structures. A comparison of dose–volume histograms illustrates the importance of spatial information for achieving the trade-offs.Conclusions: The results show that it is possible to consider the location of conflicting criteria during treatment planning. Particularly, it is possible to conserve already achieved goals with respect to the dose distribution, to visualize potential trade-offs, and to relax constraints locally. Hence, the proposed approach facilitates a systematic exploration of the optimal shape of the dose distribution.

  17. The Spatial Structure of Transnational Human Activity

    E-Print Network [OSTI]

    Deutschmann, Emanuel

    2015-01-01

    Recent studies have shown that the spatial structures of animal displacements and local-scale human motion follow L\\'{e}vy flights. Whether transnational human activity (THA) also exhibits such a pattern has however not been thoroughly examined as yet. To fill this gap, this article examines the planet-scale spatial structure of THA (a) across eight types of mobility and communication and (b) in its development over time. Combining data from various sources, it is shown that the spatial structure of THA can indeed be approximated by L\\'{e}vy flights with heavy tails that obey power laws. Scaling exponent and power-law fit differ by type of THA, being highest in refuge-seeking and tourism and lowest in student exchange. Variance in the availability of resources and opportunities for satisfying associated needs appears to explain these differences. Over time, the L\\'{e}vy-flight pattern remains intact and remarkably stable, contradicting the popular idea that socio-technological trends lead to a "death of dista...

  18. Estimating Wireless Network Properties with Spatial Statistics and Models

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Estimating Wireless Network Properties with Spatial Statistics and Models Janne Riihij statistics and models for different estimation problems related to wireless networks. We focus specifically wireless networks. We provide a concise survey of existing techniques from the spatial statistics

  19. The spatial and temporal organization of soil moisture 

    E-Print Network [OSTI]

    Vogel, Gregor Klaus

    1995-01-01

    . The spatial correlation remains unchanged with the scale and follows a power law decay typical of scaling processes. Soil moisture also shows clear scaling properties on its spatial clustering patterns. A well-defined organization of statistical character...

  20. IMPLEMENTING SPATIAL DATA WAREHOUSE HIERARCHIES IN OBJECT-RELATIONAL DBMSs

    E-Print Network [OSTI]

    Libre de Bruxelles, Université

    - sented using traditional DBMS data types, e.g., inte- ger, string. The spatial component includes its-relational (0R) implementation of SDW hierarchies. As an exam- ple of a DBMS we use Oracle 10g Spatial. We also

  1. VTA neurons coordinate with the hippocampal reactivation of spatial experience

    E-Print Network [OSTI]

    Kloosterman, Fabian

    Spatial learning requires the hippocampus, and the replay of spatial sequences during hippocampal sharp wave-ripple (SPW-R) events of quiet wakefulness and sleep is believed to play a crucial role. To test whether the ...

  2. College Students‘ GIS Spatial Concept Knowledge Assessed by Concept Maps 

    E-Print Network [OSTI]

    Oda, Katsuhiko

    2012-07-16

    The development of spatial thinking proficiency has been increasingly demanded in Geographic Information System (GIS) education. Despite this educational trend, there is little empirical research on college students' spatial ...

  3. Spatial gradient of protein phosphorylation underlies replicative bacterium

    E-Print Network [OSTI]

    Chen, Y. Erin

    Spatial asymmetry is crucial to development. One mechanism for generating asymmetry involves the localized synthesis of a key regulatory protein that diffuses away from its source, forming a spatial gradient. Although ...

  4. Nonparametric Multivariate Descriptive Measures Based on Spatial Quantiles

    E-Print Network [OSTI]

    Serfling, Robert

    Nonparametric Multivariate Descriptive Measures Based on Spatial Quantiles Robert Serfling1. Here we consider the multivariate context and utilize the "spatial quantiles", a recent vector introduce and study nonparametric measures of multivariate location, spread, skewness and kurtosis

  5. U.S. Metropolitan Spatial Structure and Employment Growth 

    E-Print Network [OSTI]

    Huang, Xiaoyan

    2014-08-13

    This study explores the influence of US metropolitan spatial structure evolution on regional employment growth rate. The first part of this study investigates the evolution of US metropolitan spatial structures from 2000 to 2010. At the macro level...

  6. Snowpack spatial variability: towards understanding its effect on remote sensing

    E-Print Network [OSTI]

    Marshall, Hans-Peter

    Snowpack spatial variability: towards understanding its effect on remote sensing measurements spatial variability: towards understanding its effect on remote sensing mea- surements and snow slope large errors in these basin estimates. Remote sensing measurements offer a promising alternative, due

  7. Probing Structural Dynamics with High Spatial and Temporal Resolution Research Team: Nigel Browning, James Evans, Patricia Abellan, Russell Tonkyn

    E-Print Network [OSTI]

    -corrected dynamic TEM (DTEM), where a photoemission source will enable these time-resolved images to be obtained at/near atomic resolution Expected Outcomes Single-shot imaging with atomic spatial resolution for in situ gas operational 10/13 Application of in situ methods in the DTEM and development of new capabilities for battery

  8. Spatially resolved heat release rate measurements in turbulent premixed flames

    SciTech Connect (OSTI)

    Ayoola, B.O.; Kaminski, C.F.; Balachandran, R.; Mastorakos, E.; Frank, J.H.

    2006-01-01

    Heat release rate is a fundamental property of great importance for the theoretical and experimental elucidation of unsteady flame behaviors such as combustion noise, combustion instabilities, and pulsed combustion. Investigations of such thermoacoustic interactions require a reliable indicator of heat release rate capable of resolving spatial structures in turbulent flames. Traditionally, heat release rate has been estimated via OH or CH radical chemiluminescence; however, chemiluminescence suffers from being a line-of-sight technique with limited capability for resolving small-scale structures. In this paper, we report spatially resolved two-dimensional measurements of a quantity closely related to heat release rate. The diagnostic technique uses simultaneous OH and CH{sub 2}O planar laser-induced fluorescence (PLIF), and the pixel-by-pixel product of the OH and CH{sub 2}O PLIF signals has previously been shown to correlate well with local heat release rates. Results from this diagnostic technique, which we refer to as heat release rate imaging (HR imaging), are compared with traditional OH chemiluminescence measurements in several flames. Studies were performed in lean premixed ethylene flames stabilized between opposed jets and with a bluff body. Correlations between bulk strain rates and local heat release rates were obtained and the effects of curvature on heat release rate were investigated. The results show that the heat release rate tends to increase with increasing negative curvature for the flames investigated for which Lewis numbers are greater than unity. This correlation becomes more pronounced as the flame gets closer to global extinction.

  9. SPATIAL POINT PROCESSES AND GRAPH BASED STATISTICAL FEATURES

    E-Print Network [OSTI]

    Jyväskylä, University of

    2010 2000 Mathematics Subject Classification. 60G55, 62-07, 62M30. ISSN 1457-9235 #12;SPATIAL POINT Classification. 60G55, 62-07, 62M30. 1 #12;Spatial point processes and graph based statistical features Tuomas library has been developed for the computation of the graph-based summaries. Keywords: Spatial point

  10. GIS and Spatial Analysis: Report on the Specialist Meeting

    E-Print Network [OSTI]

    California at Santa Barbara, University of

    GIS and Spatial Analysis: Report on the Specialist Meeting Edited by A. Stewart Fotheringham-sponsored initiative on GIS and Spatial Analysis was first submitted to the Scientific Policy Committee of the NCGIA for initiatives on "GIS and Statistical Analysis" and "GIS and Spatial Modeling". The essence of the former

  11. Environmental and Pollution Spatial Data Classification with Support Vector Machines

    E-Print Network [OSTI]

    Gilardi, Nicolas

    Environmental and Pollution Spatial Data Classification with Support Vector Machines and pollution spatial data analysis and modeling. The main attention is paid to classification of spatially be chosen by minimizing testing error. Real data on sediments pollution in the Geneva lake are used. 1

  12. EESA: 802.11ac MU-MIMO spatial stream

    E-Print Network [OSTI]

    Bahk, Saewoong

    @snu.ac.kr EESA: Energy efficient spatial stream allocation technique in 802.11ac network Heo Jeong Ryun, Bahk Sae (1), (2) (1) . . spatial stream . 1 3. EESA(Energy Efficient 2014 EESA: 802.11ac MU-MIMO spatial stream , * jrheo@netlab.snu.ac.kr, sbahk

  13. 3 Fundamentals of spatial data warehousing for geographic

    E-Print Network [OSTI]

    extensions of universal servers, in spatial engine software components, in GIS web servers, in analytical on a stand- alone GIS' (Bédard 1999). In fact, this evolution of the GIS market follows the general trends into the man- agement and exploitation of spatial databases is a major trend as it is for non- spatial

  14. Spatially addressable design of gradient index structures through spatial light modulator based holographic lithography

    SciTech Connect (OSTI)

    Ohlinger, Kris; Lutkenhaus, Jeff [Department of Physics, University of North Texas, Denton, Texas 76203 (United States); Arigong, Bayaner; Zhang, Hualiang [Department of Electrical Engineering, University of North Texas, Denton, Texas 76203 (United States); Lin, Yuankun, E-mail: yuankun.lin@unt.edu [Department of Physics, University of North Texas, Denton, Texas 76203 (United States); Department of Electrical Engineering, University of North Texas, Denton, Texas 76203 (United States)

    2013-12-07

    In this paper, we present an achievable gradient refractive index in bi-continuous holographic structures that are formed through five-beam interference. We further present a theoretic approach for the realization of gradient index devices by engineering the phases of the interfering beams with a pixelated spatial light modulator. As an example, the design concept of a gradient index Luneburg lens is verified through full-wave electromagnetic simulations. These five beams with desired phases can be generated through programming gray level super-cells in a diffractive spatial light modulator. As a proof-of-concept, gradient index structures are demonstrated using synthesized and gradient phase patterns displayed in the spatial light modulator.

  15. A Parallel Formulation of the Spatial Auto-Regression Model for Mining Large Geo-Spatial Datasets

    E-Print Network [OSTI]

    Boley, Daniel

    , Parallel Formulation, Spatial Data Mining 1 Introduction. Explosive growth in the size of spatial databases-spatial datasets is important for many application domains such as regional economics, ecology and environmental Supercomputing Institute. Electrical and Computer Engineering Department, University of Minnesota, Twin

  16. Obtaining parsimonious hydraulic conductivity fields using head and transport observations: A Bayesian

    E-Print Network [OSTI]

    Barrash, Warren

    Obtaining parsimonious hydraulic conductivity fields using head and transport observations parameter values (hydraulic conductivity in this case) which, in turn, determine flow paths. This work (2009), Obtaining parsimonious hydraulic conductivity fields using head and transport observations

  17. How to Obtain Authorization to Import and/or Export Natural Gas...

    Energy Savers [EERE]

    How to Obtain Authorization to Import andor Export Natural Gas and LNG How to Obtain Authorization to Import andor Export Natural Gas and LNG LNG Exports | Long Terms | Blanket...

  18. Gravity from the extension of spatial diffeomorphisms

    E-Print Network [OSTI]

    Szilard Farkas; Emil J. Martinec

    2010-02-24

    The possibility of the extension of spatial diffeomorphisms to a larger family of symmetries in a class of classical field theories is studied. The generator of the additional local symmetry contains a quadratic kinetic term and a potential term which can be a general (not necessarily local) functional of the metric. From the perspective of the foundation of Einstein's gravity our results are positive: The extended constraint algebra is either that of Einstein's gravity, or ultralocal gravity. If our goal is a simple modification of Einstein's gravity that for example makes it perturbatively renormalizable, as has recently been suggested, then our results show that there is no such theory within this class.

  19. Spatial Adiabatic Passage for Interacting Particles

    E-Print Network [OSTI]

    Gillet, Jeremie; Busch, Thomas

    2015-01-01

    Control over the quantum state of interacting particles to a high degree of fidelity is an important ability to have in the quest for understanding fundamental properties of non-classical states. However, the quickly increasing density of the spectrum, together with the appearance of crossings in time-dependent processes, makes any effort to control the system hard and resource intensive. Here we show that in trapped systems regimes can exist, in which isolated energy bands appear that allow to easily generalize known single-particle techniques. We demonstrate this for the well known spatial adiabatic passage effect, which can control the centre-of-mass state of atoms with high fidelity.

  20. Spatial Adiabatic Passage for Interacting Particles

    E-Print Network [OSTI]

    Jeremie Gillet; Albert Benseny; Thomas Busch

    2015-05-15

    Control over the quantum state of interacting particles to a high degree of fidelity is an important ability to have in the quest for understanding fundamental properties of non-classical states. However, the quickly increasing density of the spectrum, together with the appearance of crossings in time-dependent processes, makes any effort to control the system hard and resource intensive. Here we show that in trapped systems regimes can exist, in which isolated energy bands appear that allow to easily generalize known single-particle techniques. We demonstrate this for the well known spatial adiabatic passage effect, which can control the centre-of-mass state of atoms with high fidelity.

  1. Property:SpatialResolution | 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:QAsource HistoryPotentialRuralUtilityScalePVGeneration Jump to:SpatialResolution Jump to: navigation, search This is

  2. U-017: HP MFP Digital Sending Software Lets Local Users Obtain Potentially Sensitive Information

    Broader source: Energy.gov [DOE]

    A vulnerability was reported in HP MFP Digital Sending Software. A local user can obtain potentially sensitive information.

  3. FIRST SOLAR CELLS ON SILICON RIBBONS OBTAINED BY FAST CVD FROM SILANE

    E-Print Network [OSTI]

    Lisbon, University of

    FIRST SOLAR CELLS ON SILICON RIBBONS OBTAINED BY FAST CVD FROM SILANE C. R. Pinto, J. M. Serra, M on solar cells made on silicon ribbons obtained by a two-step process: pre-ribbons obtained by CVD followed be doped to make them suitable as base material for solar cells. To this purpose the ribbons were

  4. Damage spreading in spatial and small-world random boolean networks

    SciTech Connect (OSTI)

    Lu, Qiming [Los Alamos National Laboratory; Teuscher, Christof [Los Alamos National Laboratory

    2008-01-01

    Random Boolean Networks (RBNs) are often used as generic models for certain dynamics of complex systems, ranging from social networks, neural networks, to gene or protein interaction networks. Traditionally, RBNs are interconnected randomly and without considering any spatial arrangement of the links and nodes. However, most real-world networks are spatially extended and arranged with regular, small-world, or other non-random connections. Here we explore the RBN network topology between extreme local connections, random small-world, and random networks, and study the damage spreading with small perturbations. We find that spatially local connections change the scaling of the relevant component at very low connectivities ({bar K} << 1) and that the critical connectivity of stability K{sub s} changes compared to random networks. At higher {bar K}, this scaling remains unchanged. We also show that the relevant component of spatially local networks scales with a power-law as the system size N increases, but with a different exponent for local and small-world networks. The scaling behaviors are obtained by finite-size scaling. We further investigate the wiring cost of the networks. From an engineering perspective, our new findings provide the key trade-offs between damage spreading (robustness), the network wiring cost, and the network's communication characteristics.

  5. Designing a Language for Spatial Computing

    E-Print Network [OSTI]

    Kuhn, Werner; Ballatore, Andrea

    2015-01-01

    detailed vector data representing building roofs and otherbuilding footprint obtained from aerial photography by comparing it to ground survey data.building block for our domain-specific language consists of its ab- stract data

  6. Spatially inhomogeneous condensate in asymmetric nuclear matter

    E-Print Network [OSTI]

    A. Sedrakian

    2001-01-03

    We study the isospin singlet pairing in asymmetric nuclear matter with nonzero total momentum of the condensate Cooper pairs. The quasiparticle excitation spectrum is fourfold split compared to the usual BCS spectrum of the symmetric, homogeneous matter. A twofold splitting of the spectrum into separate branches is due to the finite momentum of the condensate, the isospin asymmetry, or the finite quasiparticle lifetime. The coupling of the isospin singlet and triplet paired states leads to further twofold splitting of each of these branches. We solve the gap equation numerically in the isospin singlet channel in the case where the pairing in the isospin triplet channel is neglected and find nontrivial solutions with finite total momentum of the pairs. The corresponding phase assumes a periodic spatial structure which carries a isospin density wave at constant total number of particles. The phase transition from the BCS to the inhomogeneous superconducting phase is found to be first order and occurs when the density asymmetry is increased above 0.25. The transition from the inhomogeneous superconducting to the unpaired normal state is second order. The maximal values of the critical total momentum (in units of the Fermi momentum) and the critical density asymmetry at which condensate disappears are $P_c/p_F = 0.3$ and $\\alpha_c = 0.41$. The possible spatial forms of the ground state of the inhomogeneous superconducting phase are briefly discussed.

  7. Spatial data analysis and environmental justice

    SciTech Connect (OSTI)

    Bahadur, R.; Samuels, W.B.; Williams, J.W.; Zeitoun, A.H.

    1997-08-01

    Evaluations of environmental justice for government actions concerned with the transportation of hazardous materials over cross country routes presents a significant challenge in spatial data analysis. The sheer volume of data required for accurate identification of minority and low-income populations along the routes and at the endpoints can be formidable. Managing and integrating large volumes of information with state-of-the-art tools is essential in the analysis of environmental justice and equity concerns surrounding transportation of hazardous materials. This paper discusses the role and limitations of geographical information systems in the analysis and visualization of populations potentially affected by the transportation of hazardous materials over transcontinental ground and water routes. Case studies are used to demonstrate the types of data and analyses needed for evaluations of environmental justice for cross country routes and end points. Inherent capabilities and limitations in spatial resolution are evaluated for environmental assessments in which potentially affected areas are quantified based on the physical characteristics of the hazardous cargo.

  8. Spatially dependent Rabi oscillations: An approach to sub-diffraction-limited coherent anti-Stokes Raman-scattering microscopy

    SciTech Connect (OSTI)

    Beeker, Willem P.; Lee, Chris J.; Boller, Klaus-Jochen; Gross, Petra; Cleff, Carsten; Fallnich, Carsten; Offerhaus, Herman L.; Herek, Jennifer L.

    2010-01-15

    We present a theoretical investigation of coherent anti-Stokes Raman scattering (CARS) that is modulated by periodically depleting the ground-state population through Rabi oscillations driven by an additional control laser. We find that such a process generates optical sidebands in the CARS spectrum and that the frequency of the sidebands depends on the intensity of the control laser light field. We show that analyzing the sideband frequency upon scanning the beams across the sample allows one to spatially resolve emitter positions where a spatial resolution of 65 nm, which is well below the diffraction limit, can be obtained.

  9. Effects of a GIS Course on Three Components of Spatial Literacy 

    E-Print Network [OSTI]

    Kim, Minsung

    2012-02-14

    This research investigated whether completing an introductory GIS course affects college students' spatial literacy as defined by spatial habits of mind, spatial concepts and thinking skills, and critical spatial thinking. This study employed three...

  10. Spatially indirect excitons in coupled quantum wells

    SciTech Connect (OSTI)

    Lai, Chih-Wei Eddy

    2004-03-01

    Microscopic quantum phenomena such as interference or phase coherence between different quantum states are rarely manifest in macroscopic systems due to a lack of significant correlation between different states. An exciton system is one candidate for observation of possible quantum collective effects. In the dilute limit, excitons in semiconductors behave as bosons and are expected to undergo Bose-Einstein condensation (BEC) at a temperature several orders of magnitude higher than for atomic BEC because of their light mass. Furthermore, well-developed modern semiconductor technologies offer flexible manipulations of an exciton system. Realization of BEC in solid-state systems can thus provide new opportunities for macroscopic quantum coherence research. In semiconductor coupled quantum wells (CQW) under across-well static electric field, excitons exist as separately confined electron-hole pairs. These spatially indirect excitons exhibit a radiative recombination time much longer than their thermal relaxation time a unique feature in direct band gap semiconductor based structures. Their mutual repulsive dipole interaction further stabilizes the exciton system at low temperature and screens in-plane disorder more effectively. All these features make indirect excitons in CQW a promising system to search for quantum collective effects. Properties of indirect excitons in CQW have been analyzed and investigated extensively. The experimental results based on time-integrated or time-resolved spatially-resolved photoluminescence (PL) spectroscopy and imaging are reported in two categories. (i) Generic indirect exciton systems: general properties of indirect excitons such as the dependence of exciton energy and lifetime on electric fields and densities were examined. (ii) Quasi-two-dimensional confined exciton systems: highly statistically degenerate exciton systems containing more than tens of thousands of excitons within areas as small as (10 micrometer){sup 2} were observed. The spatial and energy distributions of optically active excitons were used as thermodynamic quantities to construct a phase diagram of the exciton system, demonstrating the existence of distinct phases. Optical and electrical properties of the CQW sample were examined thoroughly to provide deeper understanding of the formation mechanisms of these cold exciton systems. These insights offer new strategies for producing cold exciton systems, which may lead to opportunities for the realization of BEC in solid-state systems.

  11. Spatially Resolved Observations of the Galactic Center Source, IRS 21

    E-Print Network [OSTI]

    Tanner, A; Morris, M; Becklin, E E; Cotera, A S; Ressler, M E; Werner, M; Wizinowich, P

    2002-01-01

    We present diffraction-limited 2-25 micron images obtained with the W. M. Keck 10-m telescopes that spatially resolve the cool source, IRS 21, one of a small group of enigmatic objects in the central parsec of our Galaxy that have eluded classification. Modeled as a Gaussian, the azimuthally-averaged intensity profile of IRS 21 has a half-width half-maximum (HWHM) size of 650+/-80 AU at 2.2 microns and an average HWHM size of 1600+/-200 AU at mid-infrared wavelengths. These large apparent sizes imply an extended distribution of dust. The mid-infrared color map indicates that IRS 21 is a self-luminous source rather than an externally heated dust clump as originally suggested. The spectral energy distribution has distinct near- and mid-infrared components. A simple radiative transfer code, which simultaneously fits the near- and mid- infrared photometry and intensity profiles, supports a model in which the near-infrared radiation is scattered and extincted light from an embedded central source, while the mid-in...

  12. Simulations of the spatial and temporal invariance in the spectra of gradual solar energetic particle events

    E-Print Network [OSTI]

    Wang, Yang

    2015-01-01

    The spatial and temporal invariance in the spectra of energetic particles in the gradual solar events is reproduced in the simulations. Based on a numerical solution of the focused transport equation, we obtain the intensity time profiles of solar energetic particles (SEPs) accelerated by an interplanetary shock in the three-dimensional interplanetary space. The shock is treated as a moving source of energetic particles with a distribution function. The time profiles of particle flux with different energies are calculated in the ecliptic at $1$ AU. We find that the spatial and temporal invariance in SEP spectra are the results of the effects of perpendicular diffusion and adiabatic cooling in the interplanetary space in our model. Furthermore, a spectra invariant region, which agrees with observations but is different than the one suggested by Reames and co-workers, is proposed based on our simulations.

  13. Quantifying Spatial Correlations of General Quantum Dynamics

    E-Print Network [OSTI]

    Ángel Rivas; Markus Müller

    2015-07-15

    Understanding the role of correlations in quantum systems is both a fundamental challenge as well as of high practical relevance for the control of multi-particle quantum systems. Whereas a lot of research has been devoted to study the various types of correlations that can be present in the states of quantum systems, in this work we introduce a general and rigorous method to quantify the amount of correlations in the dynamics of quantum systems. Using a resource-theoretical approach, we introduce a suitable quantifier and characterize the properties of correlated dynamics. Furthermore, we benchmark our method by applying it to the paradigmatic case of two atoms weakly coupled to the electromagnetic radiation field, and illustrate its potential use to detect and assess spatial noise correlations in quantum computing architectures.

  14. Spatial filters for high power lasers

    DOE Patents [OSTI]

    Erlandson, Alvin Charles; Bayramian, Andrew James

    2014-12-02

    A spatial filter includes a first filter element and a second filter element overlapping with the first filter element. The first filter element includes a first pair of cylindrical lenses separated by a first distance. Each of the first pair of cylindrical lenses has a first focal length. The first filter element also includes a first longitudinal slit filter positioned between the first pair of cylindrical lenses. The second filter element includes a second pair of cylindrical lenses separated by a second distance. Each of the second pair of cylindrical lenses has a second focal length. The second filter element also includes a second longitudinal slit filter positioned between the second pair of cylindrical lenses.

  15. Spatial organization of bacterial transcription and translation

    E-Print Network [OSTI]

    Michele Castellana; Ned S. Wingreen

    2015-10-29

    In bacteria such as $\\textit{Escherichia coli}$, DNA is compacted into a nucleoid near the cell center, while ribosomes - molecular complexes that translate messenger RNAs (mRNAs) into proteins - are mainly localized at the poles. We study the impact of this spatial organization using a minimal reaction-diffusion model for the cellular transcriptional-translational machinery. Our model predicts that $\\sim90\\%$ of mRNAs are segregated to the poles and reveals a "circulation" of ribosomes driven by the flux of mRNAs, from synthesis in the nucleoid to degradation at the poles. To address the existence of non-specific, transient interactions between ribosomes and mRNAs, we developed a novel method to efficiently incorporate such transient interactions into reaction-diffusion equations, which allowed us to quantify the biological implications of such non-specific interactions, e.g. for ribosome efficiency.

  16. Influence of spatial correlation for directed polymers

    E-Print Network [OSTI]

    Hubert Lacoin

    2010-12-09

    In this paper, we study a model of a Brownian polymer in $\\mathbb {R}_+\\times \\mathbb {R}^d$, introduced by Rovira and Tindel [J. Funct. Anal. 222 (2005) 178--201]. Our investigation focuses mainly on the effect of strong spatial correlation in the environment in that model in terms of free energy, fluctuation exponent and volume exponent. In particular, we prove that under some assumptions, very strong disorder and superdiffusivity hold at all temperatures when $d\\ge3$ and provide a novel approach to Petermann's superdiffusivity result in dimension one [Superdiffusivity of directed polymers in random environment (2000) Ph.D. thesis]. We also derive results for a Brownian model of pinning in a nonrandom potential with power-law decay at infinity.

  17. Spatial-heterodyne interferometry for transmission (SHIFT) measurements

    DOE Patents [OSTI]

    Bingham, Philip R.; Hanson, Gregory R.; Tobin, Ken W.

    2006-10-10

    Systems and methods are described for spatial-heterodyne interferometry for transmission (SHIFT) measurements. A method includes digitally recording a spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis using a reference beam, and an object beam that is transmitted through an object that is at least partially translucent; Fourier analyzing the digitally recorded spatially-heterodyned hologram, by shifting an original origin of the digitally recorded spatially-heterodyned hologram to sit on top of a spatial-heterodyne carrier frequency defined by an angle between the reference beam and the object beam, to define an analyzed image; digitally filtering the analyzed image to cut off signals around the original origin to define a result; and performing an inverse Fourier transform on the result.

  18. Probing Spatial, Electronic Structures with X-ray Scattering...

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

    Probing Spatial, Electronic Structures with X-ray Scattering, Spectroscopic Techniques Wednesday, September 5, 2012 - 10:45am SLAC, Bldg. 137, Room 226 Gang Chen Seminar:...

  19. Ecospace: Prediction of Mesoscale Spatial Patterns in Trophic

    E-Print Network [OSTI]

    Pauly, Daniel

    Ecospace: Prediction of Mesoscale Spatial Patterns in Trophic Relationships of Exploited Ecosystems Springer-Verlag 539 Walters, C., D. Pauly and V. Christensen. 1999. Ecospace: Prediction of mesoscale

  20. Spatial and temporal variations in indoor environmental conditions...

    Office of Scientific and Technical Information (OSTI)

    conditions, human occupancy, and operational characteristics in a new hospital building Prev Next Title: Spatial and temporal variations in indoor environmental...

  1. Multiscale modeling of spatially variable water and energy balance processes

    E-Print Network [OSTI]

    Famiglietti, J. S; Wood, E. F

    1994-01-01

    MULTISCALE WATER AND ENERGY BALANCE MODELING Wood, E. F. ,spatially variable water and energy balance processes J. S.modeling. Water and energy balance models are developed at

  2. In Search of Spatial Opportunities for Sustainable Bioenergy...

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

    Search of Spatial Opportunities for Sustainable Bioenergy Production Apr 17 2014 03:30 PM - 04:30 PM Yetta Jager, National Institute for Mathematical and Biological Syntheses ,...

  3. Spatial and Temporal Diffusion of House Prices in the UK

    E-Print Network [OSTI]

    Holly, Sean; Pesaran, M. Hashem; Yamagata, Takashi

    series of characteristics, and incorporates both spatial spillover e¤ects and spatial parametric drift. More recently Fingleton (2008) has developed a GMM estimator for a spatial house price model with spatial moving average errors. However, both... the importance of dynamic spill-over e¤ects from the neighbouring 17These are available from the authors on request. 16 regions. The contemporaneous e¤ect of London house prices are sizeable and statistically sig- ni?cant in all regions. The size of this e...

  4. Multiscale modeling of spatially variable water and energy balance processes

    E-Print Network [OSTI]

    Famiglietti, J. S; Wood, E. F

    1994-01-01

    AND WOOD: MULTISCALE WATER AND ENERGY BALANCE MODELING Wood,of spatially variable water and energy balance processes J.hydrological modeling. Water and energy balance models are

  5. Characterization of spatially resolved high resolution x-ray...

    Office of Scientific and Technical Information (OSTI)

    Characterization of spatially resolved high resolution x-ray spectrometers for high energy density physics and light source experiments Citation Details In-Document Search Title:...

  6. The chemistry of minerals obtained from the combustion of Jordanian oil shale

    E-Print Network [OSTI]

    Shawabkeh, Reyad A.

    The chemistry of minerals obtained from the combustion of Jordanian oil shale Awni Y. Al was performed on the spent oil shale (oil shale ash) obtained from the combustion of Jordanian oil shale process, minimal fragmentation was encountered since Jordanian oil shale contains large proportions of ash

  7. Method and apparatus for obtaining enhanced production rate of thermal chemical reactions

    DOE Patents [OSTI]

    Tonkovich, Anna Lee Y.; Wang, Yong; Wegeng, Robert S.; Gao, Yufei

    2003-09-09

    Reactors and processes are disclosed that can utilize high heat fluxes to obtain fast, steady-state reaction rates. Porous catalysts used in conjunction with microchannel reactors to obtain high rates of heat transfer are also disclosed. Reactors and processes that utilize short contact times, high heat flux and low pressure drop are described. Improved methods of steam reforming are also provided.

  8. Method and apparatus for obtaining enhanced production rate of thermal chemical reactions

    DOE Patents [OSTI]

    Tonkovich, Anna Lee Y. (Pasco, WA); Wang, Yong (Richland, WA); Wegeng, Robert S. (Richland, WA); Gao, Yufei (Kennewick, WA)

    2006-05-16

    Reactors and processes are disclosed that can utilize high heat fluxes to obtain fast, steady-state reaction rates. Porous catalysts used in conjunction with microchannel reactors to obtain high rates of heat transfer are also disclosed. Reactors and processes that utilize short contact times, high heat flux and low pressure drop are described. Improved methods of steam reforming are also provided.

  9. Human nature is finer: John Keats's use of the pathetic fallacy in the 1820 volume of poetry 

    E-Print Network [OSTI]

    Pharis, Mary Jane Fleming

    1979-01-01

    'S PATHETIC FALLACIES IN THE FIVE 39 ODES AND THE MINOR POEMS 47 Introduction "Ode to a Nightingale" "Ode on a Grecian Urn" "Ode to Psyche" " T o Au turn n " 49 51 53 54 "Ode on Melancholy" "Fancy" "Lines on the Mermaid Tavern" "Robin Hood" 55... by what he ex- periences according to his mood: "gay, " "enthusiastic, " "melancholy, " or "passionate, " and, therefore, uses the pathetic fallacy (p. 210). Ruskin claims, further dis- tinguishing the two orders, that "the greatest poets do not often...

  10. "No finer site for a University can be imagined than the present campus of our Alma Mater. Bounded

    E-Print Network [OSTI]

    Matrajt, Graciela

    in glass blowing or see a modern dance performance, they have an abundance of artistic opportunities

  11. Spatial Data Algorithm Extension To TRAKLA2 Environment

    E-Print Network [OSTI]

    spatial data algorithms (SDA) in the field of geoinformatics. Geoinformatics is a branch of science spatial data algorithms taught to geoinformatics stu- dents at Helsinki University of Technology, and is designed to be used on the SDA course arranged by the Institute of Cartography and Geoinformatics

  12. Efficient method for controlling the spatial coherence of a laser

    E-Print Network [OSTI]

    Cao, Hui

    variation in the total output power is presented. It is based on varying the diameter of a spatial filter from 1 to 320,000, with less than a 50% change in the total output power. We show that a degenerate- hibiting very high spatial coherence and thermal sources or light emitting diodes (LEDs) having very low

  13. Construction and Evaluation of a High Spatial Resolution Wavefront Sensor

    E-Print Network [OSTI]

    Construction and Evaluation of a High Spatial Resolution Wavefront Sensor MARTIN BUSCHBECK Bachelor.3. Analysis program 3 Evaluation of the Hartmann-Shack sensor 3.1 Calibration of the sensor 3.1.1 Reference eyes. In this thesis a high spatial resolution Hartmann-Shack wavefront sensor, which allows the study

  14. Competing Sound Sources Reveal Spatial Effects in Cortical Processing

    E-Print Network [OSTI]

    Shinn-Cunningham, Barbara

    (an analog of mammalian primary auditory cortex) encode source identity. We find that the location, these results suggest that although spatial information is available, it is not the primary feature representedCompeting Sound Sources Reveal Spatial Effects in Cortical Processing Ross K. Maddox1,2 *, Cyrus P

  15. Spatial Outage Probability Formula for CDMA Jean-Marc Kelif

    E-Print Network [OSTI]

    Coupechoux, Marceau

    Spatial Outage Probability Formula for CDMA Networks Jean-Marc Kelif France Telecom R&D Issy networks called the fluid model and we derive from this model analytical formulas for interference, outage probability, and spatial outage probability. The key idea of the fluid model is to consider the discrete base

  16. Spatial Outage Probability for Cellular Networks Jean-Marc Kelif

    E-Print Network [OSTI]

    Coupechoux, Marceau

    Spatial Outage Probability for Cellular Networks Jean-Marc Kelif France Telecom R&D Issy networks called the fluid model and we derive from this model analytical formulas for interference, outage probability, and spatial outage probability. The key idea of the fluid model is to consider the discrete base

  17. Homogenization of linear spatially periodic electronic Michel Lenczner

    E-Print Network [OSTI]

    Homogenization of linear spatially periodic electronic circuits Michel Lenczner January 20, 2006 Abstract: In this paper we establish a simplified model of general spatially periodic linear electronic is reported. 1 Introduction It is well known that when the size of an analog electronic network increases too

  18. Text and spatial data mining Finn Arup Nielsen

    E-Print Network [OSTI]

    Nielsen, Finn Årup

    Text and spatial data mining Finn °Arup Nielsen Lundbeck Foundation Center for Integrated Molecular data mining Parcellation of the human brain Parcellation of the human brain by combining text min- ing and spatial data min- ing within a neuroinformatics database. Text mining: Analysis of sci- entific abstracts

  19. 10 Leveraging the Power of Spatial Data Mining to

    E-Print Network [OSTI]

    Malerba, Donato

    ...................................................................... 261 10.3 INGENS 2.0 Architecture and Spatial Data Model....................................263 10.4 Spatial Data Mining Process in INGENS 2.0.............................................267 10-in-glove fit between GIS and data mining facilities. INGENS 2.0 is a prototype GIS which resorts to emerging

  20. Spatial Models for Groundwater Behavioral Analysis in Regions of Maharashtra

    E-Print Network [OSTI]

    Sohoni, Milind

    Spatial Models for Groundwater Behavioral Analysis in Regions of Maharashtra M.Tech Dissertation In this project we have performed spatial analysis of groundwater data in Thane and Latur districts of Maharashtra Groundwater Survey and Development Agency, Maharashtra), shape files for watershed boundaries and drainage

  1. SPATIAL VARIABILITY OF DIELECTRIC PROPERTIES IN FIELD SOILS

    E-Print Network [OSTI]

    Borchers, Brian

    SPATIAL VARIABILITY OF DIELECTRIC PROPERTIES IN FIELD SOILS J.M.H. Hendrickx, B. Borchers and J detection sensors are affected by soil properties such as water content, temperature, electrical measurements in the Netherlands, Panama, and New Mexico on spatial variability of soil water content. We also

  2. Software Integration for Multivariate Exploratory Spatial Data Analysis

    E-Print Network [OSTI]

    Symanzik, Jürgen

    Software Integration for Multivariate Exploratory Spatial Data Analysis JË?urgen Symanzik 1 software to support exploratory spatial data analysis (ESDA) where there are multiple measured attributes. In the first part, we review early experiments in software linking for ESDA, which used XGobi, di

  3. Spatial variability of magnetic soil properties Remke L. van Dama

    E-Print Network [OSTI]

    Borchers, Brian

    sensors for land mine detection. In this paper we aim to study the spatial variability of iron oxides. Keywords: land mine detection, UXO detection, iron oxides, magnetic soils, spatial variability 1 of magnetic iron oxides in the soil can seriously hamper the performance of electromagnetic sensors

  4. Ground surface temperatures in Canada: Spatial and temporal variability

    E-Print Network [OSTI]

    Long, Bernard

    show that the ground has warmed about 0.7 K in the last 100 years. Spatial variability is significant temperatures in Canada: Spatial and temporal variability, Geophys. Res. Lett., 30(10), 1499, doi:10.1029/2003GL inferred from geothermal data have shown that the study of perturbations to the Earth's energy balance

  5. Spatial Patterns and Temporal Trajectories of the Bog Ground Layer

    E-Print Network [OSTI]

    Benscoter, Brian W.

    Spatial Patterns and Temporal Trajectories of the Bog Ground Layer Along a Post-Fire Chronosequence following fire is poorly understood. Here we assess spatial and temporal changes in community composition along a chronosequence of post-fire bogs (1­105 years since fire) in north central Alberta, Canada. We

  6. Issues on Modeling Spatial Granularities Elena Camossi1

    E-Print Network [OSTI]

    Bennett, Brandon

    characteristics of spatial information. In this paper we discuss some of these issues, and we propose a formal level of detail, is crucial when integrating spatial information from heterogeneous sources, since it is often the case that information at different sources are stored at different levels of detail

  7. Wind spatial variability and topographic wave frequency Elad Shilo*1

    E-Print Network [OSTI]

    Ashkenazy, Yossi "Yosef"

    Wind spatial variability and topographic wave frequency Elad Shilo*1 , Yosef Ashkenazy2 , Alon of topographic waves with wind action has been documented in several natural lakes throughout the world. However, the influence of the wind's spatial variability (wind stress curl) on the frequency of topographic waves has

  8. Routing of spatial solitons by interaction with rod microelectrodes

    E-Print Network [OSTI]

    knowledge, the first experimental observation of spatial soliton interaction with charged conductive configurations for voltage-driven steering of spatial solitons were demonstrated using electrically conducting with two parallel polycarbonate plates 50 m apart. The inner surfaces of the plates are rubbed to align

  9. Mining Spatially Cohesive Itemsets in Protein Molecular Structures

    E-Print Network [OSTI]

    Antwerpen, Universiteit

    of amino acids in spatial proxim- ity within a set of proteins based on their atomic coordinates and ex- plore its potential to find interesting amino acid patterns within a set of proteins based item- set miner contain amino acids that frequently co-occur in the spatial structure, even

  10. Robust quantum spatial coherence near a classical environment

    E-Print Network [OSTI]

    Zhou, Shuyu; Keil, Mark; Japha, Yonathan; Folman, Ron

    2015-01-01

    In quantum physics spatial coherence allows a massive object to be present in two locations at the same time. Such spatial coherence is easily lost in the presence of a classical environment, making it unobservable in our day-to-day experience. Here we report the persistence of spatial coherence for ultra-cold atoms held only 5$\\,\\mu$m from a room temperature surface, reducing substantially the distance previously achieved between trapped atoms exhibiting spatial coherence and their classical environment. At this distance, the environment would normally destroy spatial coherence over any length greater than a few micrometers, but we nevertheless observe coherence over a length of 30$\\,\\mu$m. We show that no observable dephasing is taking place, even on a time scale on the order of one second. From a technological point of view, this may enable quantum devices based on atomic circuits.

  11. Obtaining phonetic transcriptions: a comparison between expert listeners and a continuous speech recognizer. 

    E-Print Network [OSTI]

    Wester, Mirjam; Kessens, Judith M; Cucchiarini, Catia; Strik, Helmer

    2001-01-01

    In this article, we address the issue of using a continuous speech recognition tool to obtain phonetic or phonological representations of speech. Two experiments were carried out in which the performance of a continuous ...

  12. Supporting Information All analytical expressions were obtained starting from Equation 3, the tQSSA approximation

    E-Print Network [OSTI]

    Mirny, Leonid

    information. All numerical analysis was done in Matlab, starting from the full MAK description of the cycle equations for the given inputs using the ODE23s Matlab function. Finally, the data in Figure 6 was obtained

  13. Temperatures and Natural Gamma-Ray Logs Obtained in 1986 from...

    Open Energy Info (EERE)

    and following drilling and possibly to ground shaking associated with present and past seismic activity in the Long Valley region.Natural gamma-ray logs obtained on four...

  14. Investigation of various ways of obtaining output waveforms of CMOS digital circuits by explicit methods 

    E-Print Network [OSTI]

    Ong, Lian Wah

    1989-01-01

    INVESTIGATION OF VARIOUS WAYS OF OBTAINING OUTPUT WAVEFORMS OF CMOS DIGITAL CIRCUITS BY EXPLICIT METHODS A Thesis by LIAN WAH ONG Submitted to the Office of Graduate Studies of Texas Agi. M University in partial fulfillment... of the requirement for the degree of iMASTER OF SCIENCE December 1989 Major Subject: Electrical Engineering INVESTIGATION OF VARIOUS WAYS OF OBTAINING OUTPUT WAVEFORMS OF CMOS DIGITAL CIRCUITS BY EXPLICIT METHODS A Thesis by LIAN-WAH ONG Approved...

  15. Obtaining statistics of cascading line outages spreading in an electric transmission network from standard utility data

    E-Print Network [OSTI]

    Dobson, Ian

    2015-01-01

    We show how to use standard transmission line outage historical data to obtain the network topology in such a way that cascades of line outages can be easily located on the network. Then we obtain statistics quantifying how cascading outages typically spread on the network. Processing real outage data is fundamental for understanding cascading and for evaluating the validity of the many different models and simulations that have been proposed for cascading in power networks.

  16. Spatial Spectral Estimation forSpatial Spectral Estimation for Reactor Modeling and ControlReactor Modeling and Control

    E-Print Network [OSTI]

    Scarrott, Carl

    in Magnox nuclear reactors l Establish safe operating limits l Issues: ­ Subset of measurements ­ ControlSpatial Spectral Estimation forSpatial Spectral Estimation for Reactor Modeling and ControlReactor Modeling and Control Carl Scarrott Granville Tunnicliffe-Wilson Lancaster University, UK c

  17. Reflection and transmission of light waves from the air-magnetoplasma interface: Spatial and angular Imbert-Fedorov shifts

    SciTech Connect (OSTI)

    Borhanian, Jafar

    2015-03-15

    We have investigated the reflection and transmission of an electromagnetic wave from the air-magnetoplasma interface. The reflection and transmission coefficients are obtained for an arbitrary polarized incident wave. The spatial and angular Imbert-Fedorov (IF) shifts are discussed. The numerical results are presented to study the dependence of the reflection and transmission coefficients and IF shifts on relevant parameters of the system. The plasma and wave parameters can be used to control the reflection coefficients and IF shifts.

  18. Extending the SAND Spatial Database System for the Visualization of Three-

    E-Print Network [OSTI]

    Samet, Hanan

    Extending the SAND Spatial Database System for the Visualization of Three- Dimensional Scientific of the SAND (Spatial and Nonspatial Data) spatial database system is described as is its use for data found supported by SAND involve locating spatial objects in the order of their distance from other spatial objects

  19. M. Flierl: Adaptive Spatial Wavelets for Motion-Compensated Orthogonal Video Transforms, IEEE ICIP, Cairo, Egypt, Nov. 2009. 1 ADAPTIVE SPATIAL WAVELETS FOR MOTION-COMPENSATED

    E-Print Network [OSTI]

    Flierl, Markus

    , Cairo, Egypt, Nov. 2009. 1 ADAPTIVE SPATIAL WAVELETS FOR MOTION-COMPENSATED ORTHOGONAL VIDEO TRANSFORMS

  20. Bulletin of the Seismological Society of America, 90, 6, pp. 15281534, December 2000 Spatial Correlation of Seismic Slip at the HDR-Soultz Geothermal Site

    E-Print Network [OSTI]

    Correlation of Seismic Slip at the HDR-Soultz Geothermal Site: Qualitative Approach by Peter Starzec, Michael injection well at Soultz-sou-Fore^ts Hot Dry Rock geothermal site (Alsace, France). Variograms obtained of fractures in a borehole. We found that variograms exhibiting spatial dependency correlated well with zones

  1. Quantum algorithm for obtaining the energy spectrum of a physical system

    E-Print Network [OSTI]

    Hefeng Wang; S. Ashhab; Franco Nori

    2012-06-21

    We present a polynomial-time quantum algorithm for obtaining the energy spectrum of a physical system, i.e. the differences between the eigenvalues of the system's Hamiltonian, provided that the spectrum of interest contains at most a polynomially increasing number of energy levels. A probe qubit is coupled to a quantum register that represents the system of interest such that the probe exhibits a dynamical response only when it is resonant with a transition in the system. By varying the probe's frequency and the system-probe coupling operator, any desired part of the energy spectrum can be obtained. The algorithm can also be used to deterministically prepare any energy eigenstate. As an example, we have simulated running the algorithm and obtained the energy spectrum of the water molecule.

  2. Quantitative comparison of fuel spray images obtained using ultrafast coherent and incoherent double-pulsed illumination

    E-Print Network [OSTI]

    Purwar, Harsh; Idlahcen, Saïd; Rozé, Claude; Blaisot, Jean-Bernard; Ménard, Thibault

    2015-01-01

    We present a quantitative comparison between the high-pressure fuel spray images obtained experimentally using classical imaging with coherent and incoherent ultrafast illuminations recorded using a compatible CMOS camera. The ultrafast, incoherent illumination source was extracted from the supercontinuum generated by tightly focusing the femtosecond laser pulses in water. The average velocity maps computed using time-correlated image-pairs and spray edge complexity computed using the average curvature scale space maps are compared for the spray images obtained with the two illumination techniques and also for the numerically simulated spray using the coupled volume of fluid and level set method for interface tracking (direct numerical simulation or DNS). The spray images obtained with supercontinuum-derived, incoherent, ultrafast illumination are clearer, since the artifacts arising due to laser speckles and multiple diffraction effects are largely reduced and show a better correlation with the DNS results.

  3. Process For Cutting Polymers Electrolyte Multi-Layer Batteries And Batteries Obtained Thereby

    DOE Patents [OSTI]

    Gauthier, Michel (La Prairie, CA); Lessard, Ginette (Longueuil, CA); Dussault, Gaston (St-Benoit-de-Mirabel, CA); Rouillard, Roger (Beloeil, CA); Simoneau, Martin (Montreal, CA); Miller, Alan Paul (Woodbury, MN)

    2003-09-09

    A stacking of battery laminate is prepared, each battery consisting of anode, polymer electrolyte, cathode films and possibly an insulating film, under conditions suitable to constitute a rigid monoblock assembly, in which the films are unitary with one another. The assembly obtained is thereafter cut in predetermined shape by using a mechanical device without macroscopic deformation of the films constituting the assembly and without inducing permanent short circuits. The battery which is obtained after cutting includes at least one end which appears as a uniform cut, the various films constituting the assembly having undergone no macroscopic deformation, the edges of the films of the anode including an electronically insulating passivation film.

  4. ORIGINAL PAPER Social dominance, seasonal movements, and spatial

    E-Print Network [OSTI]

    Getz, Wayne M.

    ORIGINAL PAPER Social dominance, seasonal movements, and spatial segregation in African elephants system radio telemetry provide data to evaluate the influence of social relationships on population elephant social groups despite the infrequent occur- rence of contests over resources and lack

  5. Rapid Spatial Distribution Seismic Loss Analysis for Multistory Buildings 

    E-Print Network [OSTI]

    Deshmukh, Pankaj Bhagvatrao

    2012-07-16

    Tall building frames that respond to large seismic ground motions tend to have significant spatial variability of damage over their height, often with a concentration of that damage in the lower stories. In spite of this ...

  6. Planning support systems for spatial planning through social learning

    E-Print Network [OSTI]

    Goodspeed, Robert (Robert Charles)

    2013-01-01

    This dissertation examines new professional practices in urban planning that utilize new types of spatial planning support systems (PSS) based on geographic information systems (GIS) software. Through a mixed-methods ...

  7. SPECTRAL-SPATIAL CLASSIFICATION OF HYPERSPECTRAL IMAGES USING HIERARCHICAL OPTIMIZATION

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    classified. In this work, we propose to use a Hierarchical Step-Wise Optimization (HSWO) method for including spatial depen- dencies into a classification procedure. HSWO is a segmen- tation approach, which

  8. Spatial control in the heterogeneous nucleation of water

    E-Print Network [OSTI]

    Varanasi, Kripa K.

    Heterogeneous nucleation of water plays an important role in a wide range of natural and industrial processes. Though heterogeneous nucleation of water is ubiquitous and an everyday experience, spatial control of this ...

  9. Advancing the Spatially Enabled Smart Campus, Position Papers

    E-Print Network [OSTI]

    Center for Spatial Studies, UCSB

    2013-01-01

    do we move beyond our home-based smart campus to the globalsmart technologies in cities that connect the infrastructures with our public spaces, streets, homes,home campus. 2013 Specialist Meeting— Advancing the Spatially Enabled Smart

  10. Practical Multi-antenna Spatial Reuse in Sriram Lakshmanan1

    E-Print Network [OSTI]

    Sivakumar, Raghupathy

    Practical Multi-antenna Spatial Reuse in WLANs Sriram Lakshmanan1 , Karthik Sundaresan2 , Mohammad suppression. #12;2 Sriram Lakshmanan et al. Although smart antennas have been shown to significantly improve

  11. Interaction between flow, transport and vegetation spatial structure

    E-Print Network [OSTI]

    Luhar, Mitul

    This paper summarizes recent advances in vegetation hydrodynamics and uses the new concepts to explore not only how vegetation impacts flow and transport, but also how flow feedbacks can influence vegetation spatial ...

  12. Wireless Communication Systems Based on Spatial Modulation MIMO 

    E-Print Network [OSTI]

    Wu, Xiping

    2015-01-01

    Spatial modulation (SM) is a unique single-stream, multiple-input multiple-output (MIMO) transmission technique. Unlike traditional MIMO schemes, SM sends out signals through a single active antenna, and achieves ...

  13. 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.

  14. A spatial analysis of tuberculosis in Mexico, 1990-1996 

    E-Print Network [OSTI]

    Elmore, Anita Marie

    2000-01-01

    This study describes the spatial distributions of Tuberculosis (TB) incidence and mortality rates in Mexico over the period 1990-1996. As well, it establishes the strength of association between TB incidence and mortality ...

  15. Spatial Valuation of Open Space Externalities in Baltimore County, Maryland 

    E-Print Network [OSTI]

    Gurung, Kushal

    2012-11-08

    Different open space types are assumed to be valued in different ways by the public. This thesis analyzes four spatially explicit hedonic models of Baltimore County, Maryland to examine the effect of six different open spaces types on house value...

  16. A multisensory observer model for human spatial orientation perception

    E-Print Network [OSTI]

    Newman, Michael C. (Michael Charles)

    2009-01-01

    Quantitative "observer" models for spatial orientation and eye movements have been developed based on 1-G data from humans and animals (e.g. Oman 1982, 1991, Merfeld, et al 1993, 2002; Haslwanter 2000, Vingerhoets 2006). ...

  17. Bayesian Uncertainty Quantification for Large Scale Spatial Inverse Problems 

    E-Print Network [OSTI]

    Mondal, Anirban

    2012-10-19

    and Discrete Cosine transform were used for dimension reduction of the random spatial field. Furthermore, we used a hierarchical Bayes model to inject multiscale data in the modeling framework. In this Bayesian framework, we have shown that this inverse problem...

  18. Spatial and Temporal Dynamics of Salt Marsh Vegetation across Scales 

    E-Print Network [OSTI]

    Kim, Daehyun

    2010-10-12

    of submergence and, hence, waterlogging of marsh soils and plants, which has retarded ecological succession. At the mid-scale, spatial patterns of vegetation and environmental factors were examined across tidal creeks. Sites closer to tidal creeks, compared...

  19. Explicit Graphs in a Functional Model for Spatial Databases

    E-Print Network [OSTI]

    Güting, Ralf Hartmut

    in the area affected by the fail­ ure of a power plant?'' The second issue concerns queries on distinct planes, ... -- electricity, telephone, gas, water, sewage, ... Current spatial database systems support

  20. Analysis of Spatial Performance of Meteorological Drought Indices 

    E-Print Network [OSTI]

    Patil, Sandeep 1986-

    2013-01-14

    Meteorological drought indices are commonly calculated from climatic stations that have long-term historical data and then converted to a regular grid using spatial interpolation methods. The gridded drought indices are mapped to aid decision making...

  1. Spatial correlation structure estimation using geophysical and hydrogeological data

    E-Print Network [OSTI]

    Hubbard, Susan

    and sufficient hydraulic property measurements using conventional sampling techniques, render estimation the spatial correlation structure of these properties using these conventional field sampling techniques) hydrological techniques require drilling, and the installed wells change the nature of the flow processes

  2. Spectral Analysis of Spatial Series + W.R. Tobler*

    E-Print Network [OSTI]

    Tobler, Waldo

    series. There are many examples: stock market prices, weather records, population of a city over a number, if there are such interpretations, why has this method of analysis not already been applied to spatial series? Taking the first

  3. Modernity of Chinese urban neighborhoods : toward new spatial forms

    E-Print Network [OSTI]

    Yi, Qian, 1973-

    2002-01-01

    There is always a general dilemma about how to balance technology and humanity in urban neighborhood development. Modem technology creates many new spatial forms for Chinese urban neighborhoods, but it also destroys many ...

  4. A training methodology for spatial orientation in spacecraft

    E-Print Network [OSTI]

    Buckland, Daniel Aaron

    2006-01-01

    This thesis investigates a way to use virtual reality techniques to teach space vehicle inhabitants about the configuration of their craft so that their performance in orientation and spatial memory tasks is improved. An ...

  5. Aspects of spatial thinking in geography textbook questions 

    E-Print Network [OSTI]

    Jo, Injeong

    2009-05-15

    This study examined questions embedded in four high school world geography textbooks to evaluate the degree to which the three components of spatial thinking were incorporated: concepts of space, tools of representation, and processes of reasoning...

  6. Spatial Concepts in GIS and Design, Position Papers

    E-Print Network [OSTI]

    Center for Spatial Studies, UCSB; National Center for Geographical Information and Analysis; Esri

    2008-01-01

    Fisher, P. F. (1998). Is GIS Hidebound by the Legacy ofand R. McMaster (Eds. ) GIS & Society Research . SageMeeting— Spatial Concepts in GIS and Design Sui—62 Lidwell,

  7. Combining Spatial Statistical and Ensemble Information in Probabilistic Weather Forecasts

    E-Print Network [OSTI]

    Raftery, Adrian

    Combining Spatial Statistical and Ensemble Information in Probabilistic Weather Forecasts VERONICA ensembles that generates calibrated probabilistic forecast products for weather quantities at indi- vidual perturbation (GOP) method, and extends BMA to generate calibrated probabilistic forecasts of whole weather

  8. Spatial damping of propagating sausage waves in coronal cylinders

    E-Print Network [OSTI]

    Guo, Ming-Zhe; Li, Bo; Xia, Li-Dong; Yu, Hui

    2015-01-01

    Sausage modes are important in coronal seismology. Spatially damped propagating sausage waves were recently observed in the solar atmosphere. We examine how wave leakage influences the spatial damping of sausage waves propagating along coronal structures modeled by a cylindrical density enhancement embedded in a uniform magnetic field. Working in the framework of cold magnetohydrodynamics, we solve the dispersion relation (DR) governing sausage waves for complex-valued longitudinal wavenumber $k$ at given real angular frequencies $\\omega$. For validation purposes, we also provide analytical approximations to the DR in the low-frequency limit and in the vicinity of $\\omega_{\\rm c}$, the critical angular frequency separating trapped from leaky waves. In contrast to the standing case, propagating sausage waves are allowed for $\\omega$ much lower than $\\omega_{\\rm c}$. However, while able to direct their energy upwards, these low-frequency waves are subject to substantial spatial attenuation. The spatial damping ...

  9. Spatial and temporal modulation of internal waves and thermohaline structure

    E-Print Network [OSTI]

    Cole, Sylvia T

    2010-01-01

    of outward internal wave energy and dissipation was 17 GW.timescale, the internal wave energy cascade that concludes2 addresses the internal wave energy cascade and its spatial

  10. An information-theoretic approach for obtaining property PDFs from macro specifications of microstructural variability

    E-Print Network [OSTI]

    Zabaras, Nicholas J.

    statistics of their homogenized plastic properties. This procedure is summarized in Fig. 1 for the case of estimating plastic properties of two-dimensional Al microstructures using grain size and orientation microstructures are interrogated using [1] and the bounds of plastic properties are obtained. The principle

  11. Administrative Procedures for Obtaining Unescorted Access to Radioactive Materials of Concern

    E-Print Network [OSTI]

    Jia, Songtao

    -related need". These mandates include fingerprint submission and a Federal Bureau of Investigation ("FBI to the FBI. The information received back from the FBI will be reviewed and confidentially considered that individual obtained from the FBI for the purpose of assuring correct and complete information. Columbia

  12. Interfacial and colloidal behavior of asphaltenes obtained from Brazilian crude oils

    E-Print Network [OSTI]

    Loh, Watson

    Interfacial and colloidal behavior of asphaltenes obtained from Brazilian crude oils Anto and crude oils and discuss the implications of these data on the aggregation, adsorption on solid surfaces Brazilian crude oils. Surface tension measurements in solutions formed by any of these two types

  13. Campus Building Location of centrally owned lockers Contact to obtain a centrally

    E-Print Network [OSTI]

    Qu, Rong

    Campus Building Location of centrally owned lockers Contact to obtain a centrally owned locker Number of centrally owned lockers Notes Jubilee Institute of Mental Health Shower room (A11) Building Taylor (Facilities Manager) 6 Drying cabinet next to lockers King's Meadow Main Building Locker rooms

  14. ENERGY SPECTRUM OF PRIMARY COSMIC RAYS ABOVE 1017 OBTAINED USING AKENO 20 KM2

    E-Print Network [OSTI]

    OG 6.3-3 ENERGY SPECTRUM OF PRIMARY COSMIC RAYS ABOVE 1017 EV OBTAINED USING AKENO 20 KM2 ARRAY M, Tokyo Institute of Technology, Tokyo 152, Japan . Institute of High Energy Physics, Academia Sinica these showers, 60 of them are initiated by primaries with energies larger than 1019 eV. The energy spectrum

  15. An offer you cannot refuse: obtaining efficiency and fairness in preplay

    E-Print Network [OSTI]

    Goranko, Valentin

    An offer you cannot refuse: obtaining efficiency and fairness in preplay negotiation games with conditional offers Valentin Goranko1 and Paolo Turrini2 1 Technical University of Denmark and University can make binding offers for payments of utility to the other players after the play of the game

  16. Taming Wild Behavior: The Input Observer for Obtaining Text Entry and Mouse Pointing Measures from

    E-Print Network [OSTI]

    Wobbrock, Jacob O.

    Taming Wild Behavior: The Input Observer for Obtaining Text Entry and Mouse Pointing Measures from that can run quietly in the background of users' computers and measure their text entry and mouse pointing to segment text entry and mouse pointing input streams into "trials." We are the first to measure errors

  17. PROPERTIES OF RELATIVELY-DILUTEPLASMAS IN PULSED-POWER SYSTEMS OBTAINED FROM HIGH-ACCURACY LASER

    E-Print Network [OSTI]

    PROPERTIES OF RELATIVELY-DILUTEPLASMAS IN PULSED-POWER SYSTEMS OBTAINED FROM HIGH-ACCURACY LASER plasmas under high-power pulses at the nanosecond time scale. The method is based on resonant laser application of laser-spectroscopy to investigate the electric fields and the properties of relatively dilute

  18. Benzene Increases Aneuploidy in the Lymphocytes of Exposed Workers: A Comparison of Data Obtained by

    E-Print Network [OSTI]

    California at Berkeley, University of

    Benzene Increases Aneuploidy in the Lymphocytes of Exposed Workers: A Comparison of Data Obtained Benzene is an established human leukemogen that increases the level of chromosome aberrations in lym and 8 in healthy benzene-exposed human subjects. Metaphase and interphase cells from the peripheral

  19. Apparatus for direct-to-digital spatially-heterodyned holography

    DOE Patents [OSTI]

    Thomas, Clarence E.; Hanson, Gregory R.

    2006-12-12

    An apparatus operable to record a spatially low-frequency heterodyne hologram including spatially heterodyne fringes for Fourier analysis includes: a laser; a beamsplitter optically coupled to the laser; an object optically coupled to the beamsplitter; a focusing lens optically coupled to both the beamsplitter and the object; a digital recorder optically coupled to the focusing lens; and a computer that performs a Fourier transform, applies a digital filter, and performs an inverse Fourier transform. A reference beam and an object beam are focused by the focusing lens at a focal plane of the digital recorder to form a spatially low-frequency heterodyne hologram including spatially heterodyne fringes for Fourier analysis which is recorded by the digital recorder, and the computer transforms the recorded spatially low-frequency heterodyne hologram including spatially heterodyne fringes and shifts axes in Fourier space to sit on top of a heterodyne carrier frequency defined by an angle between the reference beam and the object beam and cuts off signals around an original origin before performing the inverse Fourier transform.

  20. Spatial autocorrelation approaches to testing residuals from least squares regression

    E-Print Network [OSTI]

    Chen, Yanguang

    2015-01-01

    In statistics, the Durbin-Watson test is always employed to detect the presence of serial correlation of residuals from a least squares regression analysis. However, the Durbin-Watson statistic is only suitable for ordered time or spatial series. If the variables comprise cross-sectional data coming from spatial random sampling, the Durbin-Watson will be ineffectual because the value of Durbin-Watson's statistic depends on the sequences of data point arrangement. Based on the ideas from spatial autocorrelation, this paper presents two new statistics for testing serial correlation of residuals from least squares regression based on spatial samples. By analogy with the new form of Moran's index, an autocorrelation coefficient is defined with a standardized residual vector and a normalized spatial weight matrix. Then on the analogy of the Durbin-Watson statistic, a serial correlation index is constructed. As a case, the two statistics are applied to the spatial sample of 29 China's regions. These results show th...

  1. Implementing Strategic Environmental Assessment of spatial planning tools

    SciTech Connect (OSTI)

    De Montis, Andrea

    2013-07-15

    After more than a decade from the publication of the European Directive 2001/42/CE (Directive) on Strategic Environmental Assessment (SEA), the design and construction of the interested spatial planning instruments has gone through a variety of changes and integrations in European and in world states. This inhomogeneous panorama can be explained with a pattern of institutional structures that have so far affected the implementation of the Directive. The aim of this paper is to investigate the level of implementation of the Directive in Italy by developing a comparative analysis of the quality of integration of SEA within the design of the spatial coordination plan of a set of Italian provinces. Italian practice is analyzed in the framework of a comparative study of worldwide SEA implementation within spatial and land use planning. The results reveal strengths and weaknesses in SEA implementation at the provincial level and, in particular, the emergence of critical areas of research concerning institutional context, public participation, monitoring, and observatory of the spatial transformations. -- Highlights: • This is a comparative analysis of SEA in strategic spatial planning in Italy. • The adhesion of Provinces to the study is remarkable. • SEA implementation and integration into spatial planning is still moderate. • Participation via consultations should be more widespread. • Monitoring and institution of observatories are still in an infancy stage.

  2. Building a Scalable GeoSpatial DBMS: Technology, Implementation, and Evaluation

    E-Print Network [OSTI]

    Bertini, Robert L.

    Building a Scalable Geo­Spatial DBMS: Technology, Implementation, and Evaluation Jignesh Patel, Jie describe new techniques for building a parallel geo­ spatial DBMS, discuss our implementation

  3. Spatial Data Analysis with GIS: An Introduction to Application in the Social Sciences (92-10)

    E-Print Network [OSTI]

    Anselin, Luc

    1992-01-01

    of spatial analysis and GIS, Computers, Environment andof spatial data analysis and GIS thus provides insights thatand L.T. Steyaert (Eds. ), GIS and Environmental Modeling (

  4. Spatial Data Analysis and GIS: Interfacing GIS and Econometric Software (93-7)

    E-Print Network [OSTI]

    Anselin, Luc; Hudak, Sheri; Dodson, Rustin

    1993-01-01

    Sheri Hudak, 1993. Linking GIS and spatial data analysis inRustin, 1993. Integrating GIS and spatial analysis: anatial data analysis with GIS: an introduction to application

  5. Experimentally Attainable Optimal Pulse Shapes Obtained with the Aid of Genetic Algorithms

    E-Print Network [OSTI]

    Ruben D. Guerrero; Carlos A. Arango; Andres Reyes

    2015-05-07

    We propose a methodology to design optimal pulses for achieving quantum optimal control on molecular systems. Our approach constrains pulse shapes to linear combinations of a fixed number of experimentally relevant pulse functions. Quantum optimal control is obtained by maximizing a multi-target fitness function with genetic algorithms. As a first application of the methodology we generated an optimal pulse that successfully maximized the yield on a selected dissociation channel of a diatomic molecule. Our pulse is obtained as a linear combination of linearly chirped pulse functions. Data recorded along the evolution of the genetic algorithm contained important information regarding the interplay between radiative and diabatic processes. We performed a principal component analysis on these data to retrieve the most relevant processes along the optimal path. Our proposed methodology could be useful for performing quantum optimal control on more complex systems by employing a wider variety of pulse shape functions.

  6. Obtaining of SmS based semiconducting material and investigation of its electrical properties

    SciTech Connect (OSTI)

    Kaminskii, V. V., E-mail: Vladimir.Kaminski@mail.ioffe.ru [Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation); Hirai, Shinji; Kuzuya, Toshihiro [Muroran Institute of Technology (Japan)] [Muroran Institute of Technology (Japan); Solov'ev, S. M.; Stepanov, N. N.; Sharenkova, N. V. [Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation)] [Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation)

    2013-10-15

    Semiconductor samarium monosulfide polycrystals obtained by reaction between samarium trihydride (SmH{sub 3}) and its sesquisulfide were studied. The temperature, baric and frequency dependences of the resistivity and structural features of the samples were investigated. It is shown that the value of X-ray coherent scattering region is extremely small for SmS samples, 320 A; critical pressure of semiconductor-metal phase transition is higher than in the samples, obtained by other methods, 0.88 GPa; the temperature dependence of the resistivity has metallic behavior. Hopping mechanism of electron transport was found. All these features are explained by more defective structure of the polycrystalline SmS samples.

  7. Hydrodynamic equations for electrons in graphene obtained from the maximum entropy principle

    SciTech Connect (OSTI)

    Barletti, Luigi

    2014-08-15

    The maximum entropy principle is applied to the formal derivation of isothermal, Euler-like equations for semiclassical fermions (electrons and holes) in graphene. After proving general mathematical properties of the equations so obtained, their asymptotic form corresponding to significant physical regimes is investigated. In particular, the diffusive regime, the Maxwell-Boltzmann regime (high temperature), the collimation regime and the degenerate gas limit (vanishing temperature) are considered.

  8. SPECKLE INTERFEROMETRY AT THE USNO FLAGSTAFF STATION: OBSERVATIONS OBTAINED IN 2008 AND NINE NEW ORBITS

    SciTech Connect (OSTI)

    Hartkopf, William I.; Mason, Brian D. E-mail: bdm@usno.navy.mil

    2011-08-15

    Results are presented for 299 speckle interferometric observations of double stars, obtained in 2008 at the USNO Flagstaff Station using the 1.55 m Kaj Strand Astrometric Reflector. Separations range from 0.''15 to 9.''88, with a median of 2.''22. This observing run concentrated on neglected systems, as well as systems in need of improved orbital elements; new orbital solutions have been determined for nine systems as a result.

  9. Method for making graded I-III-VI.sub.2 semiconductors and solar cell obtained thereby

    DOE Patents [OSTI]

    Devaney, Walter E. (Seattle, WA)

    1987-08-04

    Improved cell photovoltaic conversion efficiencies are obtained by the simultaneous elemental reactive evaporation process of Mickelsen and Chen for making semiconductors by closer control of the evaporation rates and substrate temperature during formation of the near contact, bulk, and near junction regions of a graded I-III-VI.sub.2, thin film, semiconductor, such as CuInSe.sub.2 /(Zn,Cd)S or another I-III-VI.sub.2 /II-VI heterojunction.

  10. Possibility of Gravitational Tempering in Colloidal Epitaxy to Obtain a Perfect Crystal

    E-Print Network [OSTI]

    Mori, Atsushi; Matsuo, Shigeki

    2012-01-01

    We have performed Monte Carlo simulations of hard spheres on a pattern under gravity. We have found that a crystal formed at a moderate gravity strength contains essentially no defects while one formed at a higher strength gravity contains a significant amount of defects. This result suggests the possibility of using gravitational-tempering in a colloidal epitaxy to reduce the number of defects in colloidal crystals. Moreover, we wish to emphasize the possibility to obtain a perfect crystal.

  11. Communication with spatially modulated Light through turbulent Air across Vienna

    E-Print Network [OSTI]

    Mario Krenn; Robert Fickler; Matthias Fink; Johannes Handsteiner; Mehul Malik; Thomas Scheidl; Rupert Ursin; Anton Zeilinger

    2014-11-12

    The transverse spatial modes of light offer a large state-space with interesting physical properties. For exploiting it in future long-distance experiments, spatial modes will have to be transmitted over turbulent free-space links. Numerous recent lab-scale experiments have found significant degradation in the mode quality after transmission through simulated turbulence and consecutive coherent detection. Here we experimentally analyze the transmission of one prominent class of spatial modes, the orbital-angular momentum (OAM) modes, through 3 km of strong turbulence over the city of Vienna. Instead of performing a coherent phase-dependent measurement, we employ an incoherent detection scheme which relies on the unambiguous intensity patterns of the different spatial modes. We use a pattern recognition algorithm (an artificial neural network) to identify the characteristic mode pattern displayed on a screen at the receiver. We were able to distinguish between 16 different OAM mode superpositions with only ~1.7% error, and use them to encode and transmit small grey-scale images. Moreover, we found that the relative phase of the superposition modes is not affected by the atmosphere, establishing the feasibility for performing long-distance quantum experiments with the OAM of photons. Our detection method works for other classes of spatial modes with unambiguous intensity patterns as well, and can further be improved by modern techniques of pattern recognition.

  12. Elimination of Chaos in Multimode, Intracavity-doubled Lasers in the Presence of Spatial Hole-burning

    E-Print Network [OSTI]

    Monika E. Pietrzyk; Miltcho B. Danailov

    2000-12-22

    In this paper possibilities of a stabilization of large amplitude fluctuations in an intracavity-doubled solid-state laser are studied. The modification of the cross-saturation coefficient by the effect of spatial hole-burning is taken into account. The stabilization of the laser radiation by an increase of the number of modes, as proposed by James et al. (1990) and Magni et al. (1993), is analyzed. It is found that when the cross-saturation coefficient is modulated by the spatial hole-burning the stabilization is not always possible. We propose a new way of obtaining a stable steady-state configuration based on an increase of the strength of nonlinearity, which leads to a strong cancellation of modes, so that during the evolution all of the modes, but a single one, are canceled. Such a steady-state solution is found to be stable with respect to small perturbations.

  13. Spatially resolved determination of the short-circuit current density of silicon solar cells via lock-in thermography

    SciTech Connect (OSTI)

    Fertig, Fabian Greulich, Johannes; Rein, Stefan

    2014-05-19

    We present a spatially resolved method to determine the short-circuit current density of crystalline silicon solar cells by means of lock-in thermography. The method utilizes the property of crystalline silicon solar cells that the short-circuit current does not differ significantly from the illuminated current under moderate reverse bias. Since lock-in thermography images locally dissipated power density, this information is exploited to extract values of spatially resolved current density under short-circuit conditions. In order to obtain an accurate result, one or two illuminated lock-in thermography images and one dark lock-in thermography image need to be recorded. The method can be simplified in a way that only one image is required to generate a meaningful short-circuit current density map. The proposed method is theoretically motivated, and experimentally validated for monochromatic illumination in comparison to the reference method of light-beam induced current.

  14. JFIT: a framework to obtain combined experimental results through joint fits

    E-Print Network [OSTI]

    Eli Ben-Haim; René Brun; Bertrand Echenard; Thomas E. Latham

    2015-01-18

    A framework is presented for obtaining combined experimental results through joint fits of datasets from several experiments. The JFIT framework allows such fits to be performed keeping the data separated, in its original format, and using independent fitting environments, thus simplifying the process with respect to data access policies. It is based on a master-server architecture, using the network communication classes from ROOT. The framework provides an optimal way to exploit data from several experiments: it ensures that correlations are correctly taken into account and results in a better determination of nuisance parameters. Its advantages are discussed and illustrated by two examples from the domain of high energy physics.

  15. Results of the 2013 UT modeling benchmark obtained with models implemented in CIVA

    SciTech Connect (OSTI)

    Toullelan, Gwénaël; Raillon, Raphaële; Chatillon, Sylvain; Lonne, Sébastien

    2014-02-18

    The 2013 Ultrasonic Testing (UT) modeling benchmark concerns direct echoes from side drilled holes (SDH), flat bottom holes (FBH) and corner echoes from backwall breaking artificial notches inspected with a matrix phased array probe. This communication presents the results obtained with the models implemented in the CIVA software: the pencilmodel is used to compute the field radiated by the probe, the Kirchhoff approximation is applied to predict the response of FBH and notches and the SOV (Separation Of Variables) model is used for the SDH responses. The comparison between simulated and experimental results are presented and discussed.

  16. Idaho How to Obtain EPA ID Number Webpage | 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:QAsource History View NewTexas: Energy Resources JumpNewTexas:HydrothermallyIFB Agro|How to Obtain EPA ID Number

  17. Coherence area profiling in multi-spatial-mode squeezed states

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

    Lawrie, Benjamin J.; Pooser, Raphael C.; Otterstrom, Nils T.

    2015-09-12

    The presence of multiple bipartite entangled modes in squeezed states generated by four-wave mixing enables ultra-trace sensing, imaging, and metrology applications that are impossible to achieve with single-spatial-mode squeezed states. For Gaussian seed beams, the spatial distribution of these bipartite entangled modes, or coherence areas, across each beam is largely dependent on the spatial modes present in the pump beam, but it has proven difficult to map the distribution of these coherence areas in frequency and space. We demonstrate an accessible method to map the distribution of the coherence areas within these twin beams. We also show that the pumpmore »shape can impart different noise properties to each coherence area, and that it is possible to select and detect coherence areas with optimal squeezing with this approach.« less

  18. Is there further evidence for spatial variation of fundamental constants?

    SciTech Connect (OSTI)

    Berengut, J. C.; Flambaum, V. V.; King, J. A.; Curran, S. J.; Webb, J. K.

    2011-06-15

    Indications of spatial variation of the fine-structure constant, {alpha}, based on study of quasar absorption systems have recently been reported [J. K. Webb, J. A. King, M. T. Murphy, V. V. Flambaum, R. F. Carswell, and M. B. Bainbridge, arXiv:1008.3907.]. The physics that causes this {alpha}-variation should have other observable manifestations, and this motivates us to look for complementary astrophysical effects. In this paper we propose a method to test whether spatial variation of fundamental constants existed during the epoch of big bang nucleosynthesis and study existing measurements of deuterium abundance for a signal. We also examine existing quasar absorption spectra data that are sensitive to variation of the electron-to-proton mass ratio {mu} and x={alpha}{sup 2{mu}}g{sub p} for spatial variation.

  19. Spatial Evidence for Transition Radiation in a Solar Radio Burst

    E-Print Network [OSTI]

    Gelu M. Nita; Dale E. Gary; Gregory D. Fleishman

    2005-07-10

    Microturbulence, i.e. enhanced fluctuations of plasma density, electric and magnetic fields, is of great interest in astrophysical plasmas, but occurs on spatial scales far too small to resolve by remote sensing, e.g., at ~ 1-100 cm in the solar corona. This paper reports spatially resolved observations that offer strong support for the presence in solar flares of a suspected radio emission mechanism, resonant transition radiation, which is tightly coupled to the level of microturbulence and provides direct diagnostics of the existence and level of fluctuations on decimeter spatial scales. Although the level of the microturbulence derived from the radio data is not particularly high, /n^2 ~ 10^{-5}$, it is large enough to affect the charged particle diffusion and give rise to effective stochastic acceleration. This finding has exceptionally broad astrophysical implications since modern sophisticated numerical models predict generation of much stronger turbulence in relativistic objects, e.g., in gamma-ray burst sources.

  20. A Frequency-Shift based CMOS Magnetic Biosensor with Spatially Uniform Sensor Transducer Gain

    E-Print Network [OSTI]

    Hajimiri, Ali

    the spatially uniform gain. II. SENSOR MECHANIMS AND SENSOR TRANSDUCER GAIN MODELING Magnetic biosensors

  1. Female-Specific Effects on Age-Related Spatial Learning Decline in Songbirds

    E-Print Network [OSTI]

    Kosarussavadi, Saritha

    2015-01-01

    sexual dimorphism in spatial cognition could be generalized not only among mammals but also across birds.

  2. Predictive Scheduling for Spatial-dependent Tasks in Wireless Sensor Networks

    E-Print Network [OSTI]

    Wu, Jie

    --Vehicle scheduling, spatial dependency, wireless charging I. INTRODUCTION Sensor networks are deployed for various

  3. Small-scale spatial variation of benthic algal assemblages in a peat bog Katerina Cerna n

    E-Print Network [OSTI]

    - dispersal factors (Soininen et al., 2004). On a mesoscale (tens of meters or greater), spatial heterogeneity

  4. Spatial-temporal mesoscale modelling of rainfall intensity using gage and radar data

    E-Print Network [OSTI]

    Reich, Brian J.

    values. We use spatial logistic regression to model the probability of rain for both sources of data modelling, spatial logistic regression, spatial temporal models. 1 #12;and allows the temporal evolution detailed spatial structure of rain fields is costly and their maintenance is time-consuming. Remote sensing

  5. Equalization of Modal Dispersion in Multimode Fiber using Spatial Light Modulators

    E-Print Network [OSTI]

    be eliminated. We can achieve this by using spatial light modulators (SLMs) to perform adaptive spatial adaptive spatial filtering on the fields of the light such that only the desired modes are excited (Fig. 1 the use of SLMs allows the filtering to be adapted to an arbitrary, unknown fiber. Spatial Light Modulator

  6. IEEE TRANSACTIONS ON MOBILE COMPUTING 1 Road Network-Aware Spatial Alarms

    E-Print Network [OSTI]

    Liu, Ling

    IEEE TRANSACTIONS ON MOBILE COMPUTING 1 Road Network-Aware Spatial Alarms Kisung Lee, Ling Liu, Balaji Palanisamy, and Emre Yigitoglu Abstract--Road network-aware spatial alarms extend the concept of time-based alarms to spatial dimension and remind us when we travel on spatially constrained road

  7. Obtaining accurate amounts of mercury from mercury compounds via electrolytic methods

    DOE Patents [OSTI]

    Grossman, M.W.; George, W.A.

    1987-07-07

    A process is described for obtaining pre-determined, accurate rate amounts of mercury. In one embodiment, predetermined, precise amounts of Hg are separated from HgO and plated onto a cathode wire. The method for doing this involves dissolving a precise amount of HgO which corresponds to a pre-determined amount of Hg desired in an electrolyte solution comprised of glacial acetic acid and H[sub 2]O. The mercuric ions are then electrolytically reduced and plated onto a cathode producing the required pre-determined quantity of Hg. In another embodiment, pre-determined, precise amounts of Hg are obtained from Hg[sub 2]Cl[sub 2]. The method for doing this involves dissolving a precise amount of Hg[sub 2]Cl[sub 2] in an electrolyte solution comprised of concentrated HCl and H[sub 2]O. The mercurous ions in solution are then electrolytically reduced and plated onto a cathode wire producing the required, pre-determined quantity of Hg. 1 fig.

  8. A new method to obtain the broad line region size of high redshift quasars

    SciTech Connect (OSTI)

    Negrete, C. Alenka [Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico); Dultzin, Deborah [Instituto de Astronomía, Universidad Nacional Autónoma de México (Mexico); Marziani, Paola [INAF, Astronomical Observatory of Padova (Italy); Sulentic, Jack W., E-mail: cnegrete@inaoep.mx, E-mail: deborah@astro.unam.mx, E-mail: paola.marziani@oapd.inaf.it, E-mail: sulentic@iaa.es [Instituto de Astrofísica de Andalucía (Spain)

    2014-10-10

    We present high signal-to-noise ratio UV spectra for eight quasars at z ? 3 obtained with Very Large Telescope/FORS. The spectra enable us to analyze in detail the strong and weak emission features in the rest frame range 1300-2000 Å of each source (C III] ?1909, Si III] ?1892, Al III ?1860, Si II ?1814, C IV ?1549 and blended Si IV ?1397+O IV] ?1402). The flux ratios Al III ?1860/Si III] ?1892, C IV ?1549/Al III ?1860, Si IV ?1397+O IV] ?1402/Si III] ?1892 and Si IV ?1397+O IV] ?1402/C IV ?1549 strongly constrain ionizing photon flux and metallicity through the use of diagnostic maps built from CLOUDY simulations. The radius of the broad line region is then derived from the ionizing photon flux applying the definition of the ionization parameter. The r {sub BLR} estimate and the width of a virial component isolated in prominent UV lines yields an estimate of black hole mass. We compare our results with previous estimates obtained from the r {sub BLR}-luminosity correlation customarily employed to estimate the black hole masses of high redshift quasars.

  9. Covariant formulation of spatially non-symmetric kinetic equilibria in magnetized astrophysical plasmas

    SciTech Connect (OSTI)

    Cremaschini, Claudio, E-mail: claudiocremaschini@gmail.com; Stuchlík, Zden?k [Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezru?ovo nám.13, CZ-74601 Opava (Czech Republic)] [Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezru?ovo nám.13, CZ-74601 Opava (Czech Republic); Tessarotto, Massimo [Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezru?ovo nám.13, CZ-74601 Opava (Czech Republic) [Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezru?ovo nám.13, CZ-74601 Opava (Czech Republic); Department of Mathematics and Geosciences, University of Trieste, Via Valerio 12, 34127 Trieste (Italy)

    2014-05-15

    Astrophysical plasmas in the surrounding of compact objects and subject to intense gravitational and electromagnetic fields are believed to give rise to relativistic regimes. Theoretical and observational evidences suggest that magnetized plasmas of this type are collisionless and can persist for long times (e.g., with respect to a distant observer, coordinate, time), while exhibiting geometrical structures characterized by the absence of well-defined spatial symmetries. In this paper, the problem is posed whether such configurations can correspond to some kind of kinetic equilibrium. The issue is addressed from a theoretical perspective in the framework of a covariant Vlasov statistical description, which relies on the method of invariants. For this purpose, a systematic covariant variational formulation of gyrokinetic theory is developed, which holds without requiring any symmetry condition on the background fields. As a result, an asymptotic representation of the relativistic particle magnetic moment is obtained from its formal exact solution, in terms of a suitably defined invariant series expansion parameter (perturbative representation). On such a basis, it is shown that spatially non-symmetric kinetic equilibria can actually be determined, an example being provided by Gaussian-like distributions. As an application, the physical mechanisms related to the occurrence of a non-vanishing equilibrium fluid 4-flow are investigated.

  10. Spatial adiabatic passage processes in sonic crystals with linear defects

    E-Print Network [OSTI]

    Ricard Menchon-Enrich; Jordi Mompart; Veronica Ahufinger

    2014-02-19

    We investigate spatial adiabatic passage processes for sound waves propagation in sonic crystals, consisting of steel cylinders embedded in a water host medium, that present two linear defects. This work constitutes an extension of the well-known quantum optical rapid adiabatic passage technique to the field of sound propagation. Several spatial adiabatic passage devices are proposed, by appropriately designing the geometry of the two linear defects along the propagation direction, to work as a coherent multifrequency adiabatic splitter, a phase difference analyzer and a coherent multifrequency adiabatic coupler. These devices are robust in front of fluctuations of the geometric parameter values.

  11. Teleparallel Energy-Momentum Distribution of Spatially Homogeneous Rotating Spacetimes

    E-Print Network [OSTI]

    M. Sharif; M. Jamil Amir

    2007-12-08

    The energy-momentum distribution of spatially homogeneous rotating spacetimes in the context of teleparallel theory of gravity is investigated. For this purpose, we use the teleparallel version of Moller prescription. It is found that the components of energy-momentum density are finite and well-defined but are different from General Relativity. However, the energy-momentum density components become the same in both theories under certain assumptions. We also analyse these quantities for some special solutions of the spatially homogeneous rotating spacetimes.

  12. Spatial and temporal evolution of filamentation instability in a current-carrying plasma

    SciTech Connect (OSTI)

    Mohammadhosseini, B. [Laser-Plasma Research Institute, Shahid Beheshti University, G. C., Evin, Tehran 19839-63113 (Iran, Islamic Republic of); Department of Physics, Imam Khomeini International University, Qazvin 34149-16818 (Iran, Islamic Republic of); Niknam, A. R. [Laser-Plasma Research Institute, Shahid Beheshti University, G. C., Evin, Tehran 19839-63113 (Iran, Islamic Republic of); Shokri, B. [Laser-Plasma Research Institute, Shahid Beheshti University, G. C., Evin, Tehran 19839-63113 (Iran, Islamic Republic of); Department of Physics, Shahid Beheshti University, G. C., Evin, Tehran 19839-63113 (Iran, Islamic Republic of)

    2010-12-15

    The spatial and temporal evolution of the electric and magnetic fields in a current-carrying plasma is investigated in the nonlinear regime. Using the magnetohydrodynamic equations, a nonlinear diffusion equation for the magnetic field in the plasma is obtained. This nonlinear equation is numerically solved and the spatiotemporal evolution of the electric and magnetic fields and the electron density distribution are plotted. It is shown that as the time passes, the profile of the electric and magnetic fields changes from a sinusoidal shape to a saw-tooth one and the electron density distribution becomes very steepened. Also, the mechanism of the filament formation is then discussed. Furthermore, the effects of the thermal motion, collisions, and ion mass on growth rate of filaments as well as the saturation time are argued. Finally, it is found that the energy dissipation is associated with the aforementioned effects and strong plasma density gradient.

  13. Microphysical Consequences of the Spatial Distribution of Ice Nucleation in Mixed-Phase Stratiform Clouds

    SciTech Connect (OSTI)

    Yang, Fan; Ovchinnikov, Mikhail; Shaw, Raymond A.

    2014-07-28

    Mixed-phase stratiform clouds can persist even with steady ice precipitation fluxes, and the origin and microphysical properties of the ice crystals are of interest. Vapor deposition growth and sedimentation of ice particles along with a uniform volume source of ice nucleation, leads to a power law relation between ice water content wi and ice number concentration ni with exponent 2.5. The result is independent of assumptions about the vertical velocity structure of the cloud and is therefore more general than the related expression of Yang et al. [2013]. The sensitivity of the wi-ni relationship to the spatial distribution of ice nucleation is confirmed by Lagrangian tracking and ice growth with cloud-volume, cloud-top, and cloud-base sources of ice particles through a time-dependent cloud field. Based on observed wi and ni from ISDAC, a lower bound of 0.006 m^3/s is obtained for the ice crystal formation rate.

  14. Imaging of the spatial distribution of atoms in an optical-breakdown plasma with one-dimensional coherent hyper-Raman scattering

    SciTech Connect (OSTI)

    Akimov, Denis A; Zheltikov, Aleksei M; Koroteev, Nikolai I; Naumov, A N; Fedotov, Andrei B; Miles, R B; Sidorov-Biryukov, D A

    1998-12-31

    A technique based on coherent four-wave mixing with a hyper-Raman resonance in wide beams was developed for line-by-line reconstruction of the spatial distribution of excited atoms in a laser-produced plasma. This method was used to study the spatial distribution of excited lead atoms in an optical-breakdown plasma formed on a metal target. A comparison was made of the technique of constructing plasma images line-by-line with a four-photon technique of point-by-point measurements. Estimates were obtained of the spatial resolution of the proposed technique. Potential applications of this approach in plasma diagnostics were analysed. (interaction of laser radiation with matter. laser plasma)

  15. On Flue-dust and its Composition as Obtained in Roasting Argentiferous Ores

    E-Print Network [OSTI]

    Welin, John Eric

    1904-01-01

    , and of metals and t h e i r compounds that have been v o l a t i l i z e d i n the lower parts of the furnace and not condensed again In i t , but c a r r i e d along with the strong d r a f t Into the f l u e . The v o l a t i l i z e d metals or vapor... that the contact process w i l l i n the near future m o s t l y ^ i f not e n t i r e l y ^ replace the o l d leaden chamber process. The sample of fluedust i n hand was, as stated, above, obtained 10 from the f l u e of the s u l f u r i c acid plant...

  16. Process and apparatus for obtaining samples of liquid and gas from soil

    DOE Patents [OSTI]

    Rossabi, J.; May, C.P.; Pemberton, B.E.; Shinn, J.; Sprague, K.

    1999-03-30

    An apparatus and process for obtaining samples of liquid and gas from subsurface soil is provided having filter zone adjacent an external expander ring. The expander ring creates a void within the soil substrate which encourages the accumulation of soil-borne fluids. The fluids migrate along a pressure gradient through a plurality of filters before entering a first chamber. A one-way valve regulates the flow of fluid into a second chamber in further communication with a collection tube through which samples are collected at the surface. A second one-way valve having a reverse flow provides additional communication between the chambers for the pressurized cleaning and back-flushing of the apparatus. 8 figs.

  17. Quantum correlations in bulk properties of solids obtained from neutron scattering

    E-Print Network [OSTI]

    Ben-Qiong Liu; Lian-Ao Wu; Guo-Mo Zeng; Jian-Ming Song; Wei Luo; Yang Lei; Guang-Ai Sun; Bo Chen; Shu-Ming Peng

    2014-07-02

    We demonstrate that inelastic neutron scattering technique can be used to indirectly detect and measure the macroscopic quantum correlations quantified by both entanglement and discord in a quantum magnetic material, VODPO4 . 1D2O. The amount of quantum correlations is obtained 2 by analyzing the neutron scattering data of magnetic excitations in isolated V4+ spin dimers. Our quantitative analysis shows that the critical temperature of this material can reach as high as Tc = 82.5 K, where quantum entanglement drops to zero. Significantly, quantum discord can even survive at Tc = 300 K and may be used in room temperature quantum devices. Taking into account the spin-orbit (SO) coupling, we also predict theoretically that entanglement can be significantly enhanced and the critical temperature Tc increases with the strength of spin-orbit coupling.

  18. Process and apparatus for obtaining samples of liquid and gas from soil

    DOE Patents [OSTI]

    Rossabi, Joseph (105 Michael Ct., Aiken, SC 29801); May, Christopher P. (5002 Hesperus Dr., Columbia, MD 21044); Pemberton, Bradley E. (131 Glencarin Dr., Aiken, SC 29803); Shinn, Jim (Box 65, RFD. #1, South Royalton, VT 05068); Sprague, Keith (Box 234 Rte. 14, Brookfield, VT 05036)

    1999-01-01

    An apparatus and process for obtaining samples of liquid and gas from subsurface soil is provided having filter zone adjacent an external expander ring. The expander ring creates a void within the soil substrate which encourages the accumulation of soil-borne fluids. The fluids migrate along a pressure gradient through a plurality of filters before entering a first chamber. A one-way valve regulates the flow of fluid into a second chamber in further communication with a collection tube through which samples are collected at the surface. A second one-way valve having a reverse flow provides additional communication between the chambers for the pressurized cleaning and back-flushing of the apparatus.

  19. Characterization of measurement uncertainties using the correlations between local outcomes obtained from maximally entangled pairs

    E-Print Network [OSTI]

    Shota Kino; Taiki Nii; Holger F. Hofmann

    2015-08-13

    Joint measurements of non-commuting observables are characterized by unavoidable measurement uncertainties that can be described in terms of the error statistics for input states with well-defined values for the target observables. However, a complete characterization of measurement errors must include the correlations between the errors of the two observables. Here, we show that these correlations appear in the experimentally observable measurement statistics obtained by performing the joint measurement on maximally entangled pairs. For two-level systems, the results indicate that quantum theory requires imaginary correlations between the measurement errors of X and Y since these correlations are represented by the operator product XY=iZ in the measurement operators. Our analysis thus reveals a directly observable consequence of non-commutativity in the statistics of quantum measurements.

  20. Towards obtaining Green functions for a Casimir cavity in de Sitter spacetime

    E-Print Network [OSTI]

    Giampiero Esposito; George M. Napolitano

    2014-12-02

    Recent work in the literature has studied rigid Casimir cavities in a weak gravitational field, or in de Sitter spacetime, or yet other spacetime models. The present review paper studies the difficult problem of direct evaluation of scalar Green functions for a Casimir-type apparatus in de Sitter spacetime. Working to first order in the small parameter of the problem, i.e. twice the gravity acceleration times the plates' separation divided by the speed of light in vacuum, suitable coordinates are considered for which the differential equations obeyed by the zeroth- and first-order Green functions can be solved in terms of special functions. This result can be used, in turn, to obtain, via the point-split method, the regularized and renormalized energy-momentum tensor both in the scalar case and in the physically more relevant electromagnetic case.

  1. Composition and microstructure of zirconium and hafnium germanates obtained by different chemical routes

    SciTech Connect (OSTI)

    Utkin, A.V. Prokip, V.E.; Baklanova, N.I.

    2014-01-15

    The phase composition and morphology of zirconium and hafnium germanates synthesized by ceramic and co-precipitation routes were studied. The products were characterized using high-temperature X-ray diffraction analysis (XRD), Raman spectroscopy, scanning electron microscopy (SEM) and thermal (TG/DTA) analysis. To investigate the phase composition and stoichiometry of compounds the unit cell parameters were refined by full-profile Rietveld XRD analysis. The morphology of products and its evolution during high-temperature treatment was examined by SEM analysis. It was stated that there is the strong dependence of the phase composition and morphology of products on the preparation route. The ceramic route requires a multi-stage high-temperature treatment to obtain zirconium and hafnium germanates of 95% purity or more. Also, there are strong diffusion limitations to obtain hafnium germanate Hf{sub 3}GeO{sub 8} by ceramic route. On the contrary, the co-precipitation route leads to the formation of nanocrystalline single phase germanates of stoichiometric composition at a relatively low temperatures (less than 1000 °C). The results of quantitative XRD analysis showed the hafnium germanates are stoichiometric compounds in contrast to zirconium germanates that form a set of solid solutions. This distinction may be related to the difference in the ion radii of Zr and Hf. - Graphical abstract: The phase composition and morphology of zirconium and hafnium germanates synthesized by ceramic and co-precipitation routes were studied. It was stated that there is the strong dependence of the phase composition and morphology of products on the preparation route. Display Omitted - Highlights: • Zr and Hf germanates were synthesized by ceramic and co-precipitation routes. • The morphology of products depends on the synthesis parameters. • Zirconium germanates forms a set of solid solutions. • Hafnium germanates are stoichiometric compounds.

  2. Analysis of the Quality of Information Obtained About Uterine Artery Embolization From the Internet

    SciTech Connect (OSTI)

    Tavare, Aniket N.; Alsafi, Ali Hamady, Mohamad S.

    2012-12-15

    Purpose: The Internet is widely used by patients to source health care-related information. We sought to analyse the quality of information available on the Internet about uterine artery embolization (UAE). Materials and Methods: We searched three major search engines for the phrase 'uterine artery embolization' and compiled the top 50 results from each engine. After excluding repeated sites, scientific articles, and links to documents, the remaining 50 sites were assessed using the LIDA instrument, which scores sites across the domains of accessibility, usability, and reliability. The Fleisch reading ease score (FRES) was calculated for each of the sites. Finally, we checked the country of origin and the presence of certification by the Health On the Net Foundation (HONcode) as well as their effect on LIDA and FRES scores.ResultsThe following mean scores were obtained: accessibility 48/60 (80%), usability 42/54 (77%), reliability 20/51 (39%), total LIDA 110/165 (67%), and FRES 42/100 (42%). Nine sites had HONcode certification, and this was associated with significantly greater (p < 0.05) reliability and total LIDA and FRES scores. When comparing sites between United Kingdom and United States, there was marked variation in the quality of results obtained when searching for information on UAE (p < 0.05). Conclusion: In general, sites were well designed and easy to use. However, many scored poorly on the reliability of their information either because they were produced in a non-evidence-based way or because they lacking currency. It is important that patients are guided to reputable, location-specific sources of information online, especially because prominent search engine rank does not guarantee reliability of information.

  3. Image-Based Reconstruction of Spatially Varying Materials

    E-Print Network [OSTI]

    Heidrich, Wolfgang

    Image-Based Reconstruction of Spatially Varying Materials Hendrik P. A. Lensch1 Jan Kautz1 Michael material properties is an important step towards photorealistic rendering. Many real-world objects are composed of a number of materials that often show subtle changes even within a single material. Thus

  4. Information Analysis of a Spatial Database for Ecological Land classification

    E-Print Network [OSTI]

    Dozier, Jeff

    Information Analysis of a Spatial Database for Ecological Land classification Frank W. Davis:An ecologicalland classification was developed for a complex region in southern California using geographic. The analysis was weakened by map errors, especially errors in the digital elevation data. Nevertheless

  5. A Spatial Analysis of Multivariate Output from Regional Climate Models

    E-Print Network [OSTI]

    Sain, Steve

    , Columbus, OH 43210, ncressie@stat.osu.edu. 1 #12;1 Introduction Many processes in the Earth system cannot, etc. Climate models attempt to represent this system, as well as to incorporate anthropogenic forcingsA Spatial Analysis of Multivariate Output from Regional Climate Models Stephan R. Sain,1 Reinhard

  6. SST spatial anisotropic covariances from METOP-AVHRR data

    E-Print Network [OSTI]

    Boyer, Edmond

    of SST data to track, characterize and reconstruct mesoscale dynamics (cf. Klein et al. (2009); Isern et and modeling of mesoscale SST variability appears crucial to provide interpolation priors. The temporal)). However, to our knowledge, no study has explored thor- oughly at a global-scale these mesoscale spatial

  7. Spatial Reuse Enhanced MAC for Wireless Dense Networks

    E-Print Network [OSTI]

    Bahk, Saewoong

    1 Spatial Reuse Enhanced MAC for Wireless Dense Networks Sunheui Ryoo and Saewoong Bahk School) scheme in [4] uses the busy tone to inform neighbor nodes of channel usage, and exchanges Request control for energy efficient communication. It transmits CTS with stronger power to alleviate the hidden

  8. Alexandria Digital Library Project Spatial Search, Ranking, and

    E-Print Network [OSTI]

    Janée, Greg

    #12;Alexandria Digital Library Project 11 Proposed solution Geodetic box Defined by N/S/E/W edgesAlexandria Digital Library Project Spatial Search, Ranking, and Interoperability Greg Janée and James Frew University of California, Santa Barbara #12;Alexandria Digital Library Project 2 Background

  9. Climate Multi-model Regression Using Spatial Smoothing Karthik Subbian

    E-Print Network [OSTI]

    Banerjee, Arindam

    Climate Multi-model Regression Using Spatial Smoothing Karthik Subbian Arindam Banerjee Abstract There are several Global Climate Models (GCMs) reported by var- ious countries to the Intergovernmental Panel on Climate Change (IPCC). Due to the varied nature of the GCM assumptions, the fu- ture projections

  10. Beyond Desktop GIS A Family of Portable Spatial Information Technologies

    E-Print Network [OSTI]

    Egenhofer, Max J.

    Beyond Desktop GIS A Family of Portable Spatial Information Technologies Max J. EGENHOFER), moving GISs from the office desktops into the users' hands. Current GIS architectures focus on a static into their daily lives, opening GIS to the mass markets of day-to-day use. Mobile GISs will differ significantly

  11. Scalable Spatial Crowdsourcing: A study of distributed algorithms

    E-Print Network [OSTI]

    Shahabi, Cyrus

    , especially when the number of incoming workers and tasks increases. Hence, we propose a class of approaches in order to perform the corresponding task. An example of a spatial task is to take a picture to maximize his assignments while minimizing the cost. In the server-assigned mode, the assignment

  12. Scalable Spatial Crowdsourcing: A study of distributed algorithms

    E-Print Network [OSTI]

    Shahabi, Cyrus

    the corresponding task. · Example: take a picture of a particular building ·Given a set of spatial tasks and workers amount of time. ·Current studies focused on the maximization of assigned tasks rather than the runtime in the distribution and handling of the incoming data. · Incoming Workers are replicated to all M-Servers · Incoming

  13. Catchment hydrological responses to forest harvest amount and spatial pattern

    E-Print Network [OSTI]

    Pan, Feifei

    ] by decreasing evapotranspiration [Bosch and Hewlett, 1982]; (2) regrowth after harvest decreases water yield a large variability in the relationship between harvest amount and annual water yield within eachCatchment hydrological responses to forest harvest amount and spatial pattern Alex Abdelnour,1 Marc

  14. TEMPORAL AND SPATIAL PREDICTION OF RADIOCAESIUM TRANSFER TO FOOD PRODUCTS

    E-Print Network [OSTI]

    Crout, Neil

    1 TEMPORAL AND SPATIAL PREDICTION OF RADIOCAESIUM TRANSFER TO FOOD PRODUCTS A.G. GILLETT1 , N #12;2 ABSTRACT A recently developed semi-mechanistic temporal model to is used predict food product (exchangeable K, pH, % clay and % organic matter content). A raster database of soil characteristics

  15. Spatial Cluster Detection for Longitudinal Outcomes using Administrative Regions

    E-Print Network [OSTI]

    Li, Yi

    which are are defined as sets of administrative regions, such as a town, or group of administrative or town boundaries. Of- ten it is of interest to detect such spatial clusters because individuals residing in a town may have similar environmental exposures or socioeconomic backgrounds due to administrative

  16. Modeling and Querying Vague Spatial Objects Using Shapelets

    E-Print Network [OSTI]

    Gertz, Michael

    that provide building blocks for versatile high-level operations on vague spatial objects. In addition, we Endowment, ACM 978-1-59593-649-3/07/09. localized and have metadata that should be associated with distinct objects, such as agricultural chemical applications, sensor coverage maps, and vegetation levels. Together

  17. Radiative forcing from surface NOx emissions: spatial and seasonal variations

    E-Print Network [OSTI]

    Stevenson, David

    Radiative forcing from surface NOx emissions: spatial and seasonal variations R. G. Derwent & D. S distributions of methane CH4 and ozone O3 following the emission of pulses of the oxides of nitrogen NOx. Month-long emission pulses of NOx produce deficits in CH4 mixing ratios that bring about negative radiative forcing

  18. SPATIAL CHAOS, BREATHERS AND PHONOBREATHERS IN A PINNED MECHANICAL LATTICE

    E-Print Network [OSTI]

    Scheichl, Robert

    of a finite, pinned lattice system of interest in structural mechanics. We see that of all the many static, the multitude of static solutions mentioned above Centre for Nonlinear Mechanics, University of Bath, Bath, BA2SPATIAL CHAOS, BREATHERS AND PHONOBREATHERS IN A PINNED MECHANICAL LATTICE S.C.GREEN, C

  19. Spatially-Resolved Structure and Electronic Properties of Graphene on

    E-Print Network [OSTI]

    Pohl, Karsten

    Spatially-Resolved Structure and Electronic Properties of Graphene on Polycrystalline Ni Jiebing method for producing large, continuous graphene films.1,2 One of the earliest approaches involves segregating carbon from the saturated bulk of a Ni thin film.3 The segregated carbon forms graphene

  20. Describing Spatial Relations using Informal Semantics Kristin Stock1

    E-Print Network [OSTI]

    Stock, Kristin

    Describing Spatial Relations using Informal Semantics Kristin Stock1 1 University of Nottingham, NG7 2RD, Nottingham Tel. +44(0)787 299 3270 Email: kristin.stock@nottingham.ac.uk Web address: http, people tend to think in terms of informal semantics. Informal semantics take the form of cognitive models

  1. JAVA GIS, Exploratory Spatial Data Analysis and Precision Farming

    E-Print Network [OSTI]

    Cook, Di

    JAVA GIS, Exploratory Spatial Data Analysis and Precision Farming Nicholas Lewin Dept of Statistics XGobi to JAVA, as a new implementation JGobi, as a companion to this package we would like to develop our own map applica­ tion, also in JAVA that would over come platform dependencies, as well

  2. A positive mass theorem for two spatial dimensions

    E-Print Network [OSTI]

    Willie Wai-Yeung Wong

    2012-03-01

    We observe that an analogue of the Positive Mass Theorem in the time-symmetric case for three-space-time-dimensional general relativity follows trivially from the Gauss-Bonnet theorem. In this case we also have that the spatial slice is diffeomorphic to $\\Real^2$.

  3. Asynchronous Stochastic Dynamics and the Spatial Prisoner's Dilemma Game

    E-Print Network [OSTI]

    Grilo, Carlos

    Asynchronous Stochastic Dynamics and the Spatial Prisoner's Dilemma Game Carlos Grilo1 and Lu modeled as a game and the Prisoner's Dilemma game is one of the most used metaphors to study the evolution. Grilo and L. Correia C D C R, R S, T D T, S P, P Fig. 1. Payoff matrix for the Prisoner's Dilemma game

  4. Graph-based Navigation Strategies for Heterogeneous Spatial Data Sets

    E-Print Network [OSTI]

    Rodríguez-Tastets, Maria Andrea

    Graph-based Navigation Strategies for Heterogeneous Spatial Data Sets Andrea Rodr´iguez1 the information contribution of data sets based on correspondence relations outperform a strategy that considers- base representation, this work describes strategies that optimize the navigation of data sets

  5. Spatial Standard Observer for Visual Technology Andrew B. Watson

    E-Print Network [OSTI]

    , acuity, discrimination, model, modelfest, standard observer. 1 Definition The Spatial Standard Observer at a specific viewing distance, and the pixels have a known relation to luminance. The output of the metric of log contrast energy. The horizontal axis indicates ModelFest stimulus number. Miniature versions

  6. Transformation of spatial and perturbation derivatives of travel time

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Transformation of spatial and perturbation derivatives of travel time at a general interface and perturbation parameters. We derive the explicit equations for transforming these travel­time derivatives Hamiltonian function and are applicable to the transformation of travel­time derivatives in both isotropic

  7. Time-spatial drift of decelerating electromagnetic pulses

    E-Print Network [OSTI]

    Nerukh, Dmitry

    Time-spatial drift of decelerating electromagnetic pulses Alexander G. Nerukh1* and Dmitry A dependent electromagnetic pulse generated by a current running laterally to the direction of the pulse propagation is considered in paraxial approximation. It is shown that the pulse envelope moves in the time

  8. Software Integration for Multivariate Exploratory Spatial Data Analysis

    E-Print Network [OSTI]

    Symanzik, Jürgen

    Software Integration for Multivariate Exploratory Spatial Data Analysis Jurgen Symanzik1, Deborah F@iastate.edu Abstract This paper describes a decade's worth of evolution of integrating software to support exploratory, we review early experiments in software linking for ESDA, which used XGobi, di erent Geographic

  9. Software Integration for Multivariate Exploratory Spatial Data Analysis

    E-Print Network [OSTI]

    Symanzik, Jürgen

    Software Integration for Multivariate Exploratory Spatial Data Analysis J¨urgen Symanzik1 , Deborah@iastate.edu Abstract This paper describes a decade's worth of evolution of integrating software to support exploratory, we review early experiments in software linking for ESDA, which used XGobi, different Geographic

  10. Spatial dynamics of ecological public goods Joe Yuichiro Wakanoa

    E-Print Network [OSTI]

    Hauert, Christoph

    March 16, 2009 (received for review December 11, 2008) The production, consumption, and exploitation-changing configurations. The local environment of cooperators and defectors is shaped by the pro- duction or consumption of common resources. Hence, diffusion- induced self-organization into spatial patterns not only enhances

  11. The Variational Inequality Approach for Solving Spatial Auction ...

    E-Print Network [OSTI]

    2007-03-23

    Mar 23, 2007 ... y(k) = (yj)j?Jk , the i-th seller (j-th buyer) determines his price gi = gi(xi) ..... The simplest projection method applied to problem (7) can be described ... [1] J.Y. Wei and Y. Smeers, Spatial oligopolistic electricity models with.

  12. Clustering Spatial Data when Facing Physical Constraints Osmar R. Zaiane

    E-Print Network [OSTI]

    Zaiane, Osmar R.

    of arbitrary shape and is insensitive to noise and the input order. Its average run- ning complexity is O spatial data. In a GIS application studying the movement of pedestrians to identify optimal bank machine to solve the prob- lem of clustering in the presence of physical obstacles to cross such as rivers

  13. Organization of Data in Non-Convex Spatial Domains

    E-Print Network [OSTI]

    Kazhdan, Michael

    discovery and analysis of the observational and model data sets of the Chesapeake Bay Environmental are long and skinny with a large number of winding, tendril-like tributaries. Non- convexity arises in many scientific databases [1, 2] and geo-spatial services, such as geotagging, urban computing [3

  14. Low Complexity Spatial Interpolation For Cellular Coverage Analysis

    E-Print Network [OSTI]

    Fort, Gersende

    was first introduced in [2] as an integrated database for Cognitive Radio systems and one application] and [3], it consists of building a coverage map based on the MDT measurements for an automated coverage to build the whole coverage map using a spatial interpolation technique originating from geo

  15. Bayesian Comparison of Spatially Regularised General Linear Models

    E-Print Network [OSTI]

    Penny, Will

    Bayesian Comparison of Spatially Regularised General Linear Models Will Penny,1* Guillaume Flandin, London WC1N 3BG 2 Cuban Neuroscience Center, Havana, Cuba Abstract: In previous work (Penny et al., [2005. In neuroimaging, BMC is used in the analysis of func- tional integration [Penny et al., 2004]. This allows infer

  16. Miniature eye movements enhance fine spatial detail Michele Rucci1

    E-Print Network [OSTI]

    Rucci, Michele

    retinal image motion is eliminated in the laboratory5­9 . However, it has long been debated whether a new method of retinal image sta- bilization18 , we selectively eliminated the motion of the retinal to constitute an effective sampling strategy by which the visual system enhances the processing of spatial

  17. Spatial Modeling of Geographic Patterns in Biodiversity and Biofuel Production

    E-Print Network [OSTI]

    Spatial Modeling of Geographic Patterns in Biodiversity and Biofuel Production How can the US for increasing biofuel production have already come under fire because of real and perceived threats.S. will be to ensure that bioenergy supplies meet sustainable production standards that include consideration

  18. Precipitation event distribution in Central Argentina: spatial and temporal patterns

    E-Print Network [OSTI]

    Nacional de San Luis, Universidad

    Precipitation event distribution in Central Argentina: spatial and temporal patterns Patricio N, C1417DSE Buenos Aires, Argentina ABSTRACT The annual amount of precipitation inputs received, these inputs have to escape runoff, favoured by large and less frequent precipitation events, and evaporation

  19. DIFFERENCE OF THE AVERAGE SINGLE-PARTICLE ENERGY SUMS OBTAINED BY SMOOTHING IN ENERGY AND PARTICLE-NUMBER SPACE

    E-Print Network [OSTI]

    Pomorska, Bozena

    .p. energy space (e-folding). An alternative way of obtaining of the smooth energy by folding of the singleDIFFERENCE OF THE AVERAGE SINGLE-PARTICLE ENERGY SUMS OBTAINED BY SMOOTHING IN ENERGY AND PARTICLE the smooth energy of nucleus is obtained by folding of the single-particle (s.p.) energy density in the s

  20. Direct asymmetry measurement of temperature and density spatial distributions in inertial confinement fusion plasmas from pinhole space-resolved spectra

    E-Print Network [OSTI]

    Nagayama, T; Florido, R; Mayes, D; Tommasini, R; Koch, J A; Delettrez, J A; Regan, S P; Smalyuk, V A

    2014-01-01

    Two-dimensional space-resolved temperature and density images of an inertial confinement fusion (ICF) implosion core have been diagnosed for the first time. Argon-doped, direct-drive ICF experiments were performed at the Omega Laser Facility and a collection of two-dimensional space-resolved spectra were obtained from an array of gated, spectrally resolved pinhole images recorded by a multi-monochromatic x-ray imager. Detailed spectral analysis revealed asymmetries of the core not just in shape and size but in the temperature and density spatial distributions, thus characterizing the core with an unprecedented level of detail.

  1. Direct asymmetry measurement of temperature and density spatial distributions in inertial confinement fusion plasmas from pinhole space-resolved spectra

    SciTech Connect (OSTI)

    Nagayama, T.; Mancini, R. C.; Florido, R.; Mayes, D. [Physics Department, University of Nevada, Reno, Nevada 89557 (United States)] [Physics Department, University of Nevada, Reno, Nevada 89557 (United States); Tommasini, R.; Koch, J. A. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)] [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Delettrez, J. A.; Regan, S. P.; Smalyuk, V. A. [Laboratory for Laser Energetics, University of Rochester, New York 14623 (United States)] [Laboratory for Laser Energetics, University of Rochester, New York 14623 (United States)

    2014-05-15

    Two-dimensional space-resolved temperature and density images of an inertial confinement fusion (ICF) implosion core have been diagnosed for the first time. Argon-doped, direct-drive ICF experiments were performed at the Omega Laser Facility and a collection of two-dimensional space-resolved spectra were obtained from an array of gated, spectrally resolved pinhole images recorded by a multi-monochromatic x-ray imager. Detailed spectral analysis revealed asymmetries of the core not just in shape and size but in the temperature and density spatial distributions, thus characterizing the core with an unprecedented level of detail.

  2. Title: Spatial analysis in R Part 1, Getting data from the ACS into R and Exploratory Spatial Data Analysis.

    E-Print Network [OSTI]

    Bermúdez, José Luis

    scientists. R itself is a statistical programming language, and has an enormous capacity for different types of numerical and statistical analysis. I leave the reader to download and install R on their computers teach a course in spatial statistics in our applied demography doctoral program, and many

  3. Qualification of data obtained during a severe accident. Illustrative examples from TMI-2 evaluations

    SciTech Connect (OSTI)

    Rempe, Joy L.; Knudson, Darrell L.

    2015-02-01

    The accidents at the Three Mile Island Unit 2 (TMI-2) Pressurized Water Reactor (PWR) and the Daiichi Units 1, 2, and 3 Boiling Water Reactors (BWRs) provide unique opportunities to evaluate instrumentation exposed to severe accident conditions. Conditions associated with the release of coolant and the hydrogen burn that occurred during the TMI-2 accident exposed instrumentation to harsh conditions, including direct radiation, radioactive contamination, and high humidity with elevated temperatures and pressures. Post-TMI-2 instrumentation evaluation programs focused on data required by TMI-2 operators to assess the condition of the reactor and containment and the effect of mitigating actions taken by these operators. Prior efforts also focused on sensors providing data required for subsequent forensic evaluations and accident simulations. This paper provides additional details related to the formal process used to develop a qualified TMI-2 data base and presents data qualification details for three parameters: reactor coolant system (RCS) pressure; containment building temperature; and containment pressure. These selected examples illustrate the types of activities completed in the TMI-2 data qualification process and the importance of such a qualification effort. These details are described to facilitate implementation of a similar process using data and examinations at the Daiichi Units 1, 2, and 3 reactors so that BWR-specific benefits can be obtained.

  4. Porous acicular mullite obtained by controlled oxidation of waste molybdenum disilicide

    SciTech Connect (OSTI)

    Bu?evac, Dušan, E-mail: bucevac@vinca.rs [Vin?a Institute of Nuclear Sciences, University of Belgrade, Belgrade 11001 (Serbia); Dap?evi?, Aleksandra [Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade 11120 (Serbia); Maksimovi?, Vesna [Vin?a Institute of Nuclear Sciences, University of Belgrade, Belgrade 11001 (Serbia)

    2014-02-01

    Highlights: • Waste MoSi{sub 2} heating elements were used as starting material for fabrication of porous acicular mullite. • Calcined MoSi{sub 2} powder was source of SiO{sub 2} and pore former at the same time. • Porous acicular mullite is promising material for filtration of diesel engine exhaust. • Samples with decent mechanical integrity and porosity of more than 60% were fabricated. - Abstract: Porous acicular mullite was fabricated by using waste MoSi{sub 2} heating element and Al{sub 2}O{sub 3}. Careful calcination of the pulverized heating element led to the formation of a mixture of MoO{sub 3} and amorphous SiO{sub 2}. This mixture was employed as both SiO{sub 2} precursor and pore former. The oxidation of MoSi{sub 2} and mullite formation were studied. The effect of fabrication temperature on phase composition, porosity, grain morphology, and compressive strength of sintered mullite was examined. Pure mullite with porosity of more than 60% and compressive strength of ?20 MPa was obtained at temperature as low as 1300 °C. The microstructure consisted of elongated, rectangular, prism-like grains which are known to be effective in filtration of diesel engine exhaust. The increase in sintering temperature caused the change of grain morphology and reduction in compressive strength.

  5. The component groups structure of DPPC bilayers obtained by specular neutron reflectometry

    E-Print Network [OSTI]

    Michal Beli?ka; Yuri Gerelli; Norbert Ku?erka; Giovanna Fragneto

    2014-12-16

    Specular neutron reflectometry (SNR) was measured on a system of a floating bilayer consisting of 1,2-dipalmitoyl-d62-\\textit{sn}-glycero-3-phosphocholine (d62-diC16:0PC) deposited over a 1,2-dibehenoyl-\\textit{sn}-glycero-3-phosphocholine (diC22:0PC) bilayer at 25 and 55 {\\deg}C. The internal structure of lipid bilayers was described by a one dimensional scattering length density profile (SLDP) model, originally developed for the evaluation of small angle scattering data. The corresponding model reflectivity curves successfully describe the experimental reflectivity curves of a supported bilayer in the gel phase and a system of a floating bilayer in the liquid crystalline phase. The reflectivity data from the supported bilayer were evaluated individually and served further as an input by the data treatment of floating bilayer reflectivity curves. The results yield internal structure of a deposited and floating bilayer on the level of component groups of lipid molecules. The obtained structure of the floating d62-diC16:0PC bilayer displays high resemblance to the bilayer structure in the form of unilamellar vesicles, however, simultaneously it shows rate of fluctuations in comparison to unilamellar vesicle bilayers.

  6. Casingless down-hole for sealing an ablation volume and obtaining a sample for analysis

    DOE Patents [OSTI]

    Noble, D.T.; Braymen, S.D.; Anderson, M.S.

    1996-10-01

    A casing-less down hole sampling system for acquiring a subsurface sample for analysis using an inductively coupled plasma system is disclosed. The system includes a probe which is pushed into the formation to be analyzed using a hydraulic ram system. The probe includes a detachable tip member which has a soil point and a barb, with the soil point aiding the penetration of the earth, and the barb causing the tip member to disengage from the probe and remain in the formation when the probe is pulled up. The probe is forced into the formation to be tested, and then pulled up slightly, to disengage the tip member and expose a column of the subsurface formation to be tested. An instrumentation tube mounted in the probe is then extended outward from the probe to longitudinally extend into the exposed column. A balloon seal mounted on the end of the instrumentation tube allows the bottom of the column to be sealed. A source of laser radiation is emitted from the instrumentation tube to ablate a sample from the exposed column. The instrumentation tube can be rotated in the probe to sweep the laser source across the surface of the exposed column. An aerosol transport system carries the ablated sample from the probe to the surface for testing in an inductively coupled plasma system. By testing at various levels in the down-hole as the probe is extracted from the soil, a profile of the subsurface formation may be obtained. 9 figs.

  7. Apparatus for transmitting power obtained by converting the exhaust energy of an engine

    SciTech Connect (OSTI)

    Miyajima, H.

    1988-08-30

    This patent describes an apparatus for transmitting power obtained by converting the exhaust energy of a primary engine, the primary engine having a crank shaft and an exhaust passage for passing exhaust gas from the engine. The apparatus consists of: an output turbine having an output shaft and an intake port coupled to the exhaust passage; a compressor mounted on the output shaft of the turbine and including an outlet port; a rotary type engine having a double jointed trochoidal shaped rotor housing, the housing having an expansion chamber with an intake port and an outlet port and a compression chamber, the engine further comprising an eccentrically rotatable generally triangular shaped rotor mounted within the housing and a rotor shaft coupled to the rotor. The outlet port of the compressor is coupled to the intake port of the expansion chamber, the outlet port of the expansion chamber being coupled to the intake port of the output turbine; and power transmitting means connected between the crank shaft of the primary engine and the rotor shaft of the rotary engine whereby auxiliary power is provided to the primary engine.

  8. Assessment of national systems for obtaining local acceptance of waste management siting and routing activities

    SciTech Connect (OSTI)

    Paige, H.W.; Lipman, D.S.; Owens, J.E.

    1980-07-01

    There is a rich mixture of formal and informal approaches being used in our sister nuclear democracies in their attempts to deal with the difficulties of obtaining local acceptance for siting of waste management facilities and activities. Some of these are meeting with a degree of success not yet achieved in the US. Although this survey documents and assesses many of these approaches, time did not permit addressing in any detail their relevance to common problems in the US. It would appear the US could benefit from a periodic review of the successes and failures of these efforts, including analysis of their applicability to the US system. Of those countries (Germany, Sweden, Switzerland, Japan, Belgium, and the US) who are working to a time table for the preparation of a high-level waste (HLW) repository, Germany is the only country to have gained local siting acceptance for theirs. With this (the most difficult of siting problems) behind them they appear to be in the best overall condition relative to waste management progress and plans. This has been achieved without a particularly favorable political structure, made up for by determination on the part of the political leadership. Of the remaining three countries studied (France, UK and Canada) France, with its AVM production facility, is clearly the world leader in the HLW immobilization aspect of waste management. France, Belgium and the UK appear to have the least favorable political structures and environments for arriving at waste management decisions. US, Switzerland and Canada appear to have the least favorable political structures and environments for arriving at waste management decisions.

  9. Development of a general method for obtaining the geometry of microfluidic networks

    SciTech Connect (OSTI)

    Razavi, Mohammad Sayed Salimpour, M. R.; Shirani, Ebrahim

    2014-01-15

    In the present study, a general method for geometry of fluidic networks is developed with emphasis on pressure-driven flows in the microfluidic applications. The design method is based on general features of network's geometry such as cross-sectional area and length of channels. Also, the method is applicable to various cross-sectional shapes such as circular, rectangular, triangular, and trapezoidal cross sections. Using constructal theory, the flow resistance, energy loss and performance of the network are optimized. Also, by this method, practical design strategies for the fabrication of microfluidic networks can be improved. The design method enables rapid prediction of fluid flow in the complex network of channels and is very useful for improving proper miniaturization and integration of microfluidic networks. Minimization of flow resistance of the network of channels leads to universal constants for consecutive cross-sectional areas and lengths. For a Y-shaped network, the optimal ratios of consecutive cross-section areas (A{sub i+1}/A{sub i}) and lengths (L{sub i+1}/L{sub i}) are obtained as A{sub i+1}/A{sub i} = 2{sup ?2/3} and L{sub i+1}/L{sub i} = 2{sup ?1/3}, respectively. It is shown that energy loss in the network is proportional to the volume of network. It is also seen when the number of channels is increased both the hydraulic resistance and the volume occupied by the network are increased in a similar manner. Furthermore, the method offers that fabrication of multi-depth and multi-width microchannels should be considered as an integral part of designing procedures. Finally, numerical simulations for the fluid flow in the network have been performed and results show very good agreement with analytic results.

  10. HIGH SPATIAL RESOLUTION OBSERVATIONS OF LOOPS IN THE SOLAR CORONA

    SciTech Connect (OSTI)

    Brooks, David H.; Ugarte-Urra, Ignacio [College of Science, George Mason University, 4400 University Drive, Fairfax, VA 22030 (United States); Warren, Harry P. [Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States); Winebarger, Amy R. [NASA Marshall Space Flight Center, ZP 13, Huntsville, AL 35812 (United States)

    2013-08-01

    Understanding how the solar corona is structured is of fundamental importance to determine how the Sun's upper atmosphere is heated to high temperatures. Recent spectroscopic studies have suggested that an instrument with a spatial resolution of 200 km or better is necessary to resolve coronal loops. The High Resolution Coronal Imager (Hi-C) achieved this performance on a rocket flight in 2012 July. We use Hi-C data to measure the Gaussian widths of 91 loops observed in the solar corona and find a distribution that peaks at about 270 km. We also use Atmospheric Imaging Assembly data for a subset of these loops and find temperature distributions that are generally very narrow. These observations provide further evidence that loops in the solar corona are often structured at a scale of several hundred kilometers, well above the spatial scale of many proposed physical mechanisms.

  11. Spatial-temporal event detection in climate parameter imagery.

    SciTech Connect (OSTI)

    McKenna, Sean Andrew; Gutierrez, Karen A.

    2011-10-01

    Previously developed techniques that comprise statistical parametric mapping, with applications focused on human brain imaging, are examined and tested here for new applications in anomaly detection within remotely-sensed imagery. Two approaches to analysis are developed: online, regression-based anomaly detection and conditional differences. These approaches are applied to two example spatial-temporal data sets: data simulated with a Gaussian field deformation approach and weekly NDVI images derived from global satellite coverage. Results indicate that anomalies can be identified in spatial temporal data with the regression-based approach. Additionally, la Nina and el Nino climatic conditions are used as different stimuli applied to the earth and this comparison shows that el Nino conditions lead to significant decreases in NDVI in both the Amazon Basin and in Southern India.

  12. Revealing spatially heterogeneous relaxation in a model nanocomposite

    E-Print Network [OSTI]

    Cheng, Shiwang; Carrillo, Jan-Michael Y; Bocharova, Vera; Sumpter, Bobby G; Schweizer, Kenneth S; Sokolov, Alexei P

    2015-01-01

    The detailed nature of spatially heterogeneous dynamics of glycerol-silica nanocomposites is unraveled by combining dielectric spectroscopy with atomistic simulation and statistical mechanical theory. Analysis of the spatial mobility gradient shows no 'glassy' layer, but the alpha relaxation time near the nanoparticle grows with cooling faster than the alpha relaxation time in the bulk, and is ~ 20 times longer at low temperatures. The interfacial layer thickness increases from ~ 1.8 nm at higher temperatures to ~ 3.5 nm upon cooling to near Tg. A real space microscopic description of the mobility gradient is constructed by synergistically combining high temperature atomistic simulation with theory. Our analysis suggests that the interfacial slowing down arises mainly due to an increase of the local cage scale barrier for activated hopping induced by enhanced packing and densification near the nanoparticle surface. The theory is employed to predict how local surface densification can be manipulated to control...

  13. The extreme vulnerability of interdependent spatially embedded networks

    E-Print Network [OSTI]

    Bashan, Amir; Buldyrev, Sergey V; Havlin, Shlomo

    2015-01-01

    Recent studies show that in interdependent networks a very small failure in one network may lead to catastrophic consequences. Above a critical fraction of interdependent nodes, even a single node failure can invoke cascading failures that may abruptly fragment the system, while below this "critical dependency" (CD) a failure of few nodes leads only to small damage to the system. So far, the research has been focused on interdependent random networks without space limitations. However, many real systems, such as power grids and the Internet, are not random but are spatially embedded. Here we analytically and numerically analyze the stability of systems consisting of interdependent spatially embedded networks modeled as lattice networks. Surprisingly, we find that in lattice systems, in contrast to non-embedded systems, there is no CD and \\textit{any} small fraction of interdependent nodes leads to an abrupt collapse. We show that this extreme vulnerability of very weakly coupled lattices is a consequence of t...

  14. Determining biological tissue optical properties via integrating sphere spatial measurements

    DOE Patents [OSTI]

    Baba, Justin S. (Knoxville, TN); Letzen, Brian S. (Coral Springs, FL)

    2011-01-11

    An optical sample is mounted on a spatial-acquisition apparatus that is placed in or on an enclosure. An incident beam is irradiated on a surface of the sample and the specular reflection is allowed to escape from the enclosure through an opening. The spatial-acquisition apparatus is provided with a light-occluding slider that moves in front of the sample to block portions of diffuse scattering from the sample. As the light-occluding slider moves across the front of the sample, diffuse light scattered into the area of the backside of the light-occluding slider is absorbed by back side surface of the light-occluding slider. By measuring a baseline diffuse reflectance without a light-occluding slider and subtracting measured diffuse reflectance with a light-occluding slider therefrom, diffuse reflectance for the area blocked by the light-occluding slider can be calculated.

  15. First MR images obtained during megavoltage photon irradiation from a prototype integrated linac-MR system

    SciTech Connect (OSTI)

    Fallone, B. G.; Murray, B.; Rathee, S.; Stanescu, T.; Steciw, S.; Vidakovic, S.; Blosser, E.; Tymofichuk, D. [Department of Medical Physics, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2 (Canada) and Department of Oncology, Medical Physics Division, University of Alberta, 11560 University Avenue, Edmonton, Alberta T6G 1Z2 (Canada); Department of Medical Physics, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2 (Canada); Department of Medical Physics, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2 (Canada) and Department of Oncology, Medical Physics Division, University of Alberta, 11560 University Avenue, Edmonton, Alberta T6G 1Z2 (Canada); Department of Medical Physics, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2 (Canada)

    2009-06-15

    The authors report the first magnetic resonance (MR) images produced by their prototype MR system integrated with a radiation therapy source. The prototype consists of a 6 MV linac mounted onto the open end of a biplanar 0.2 T permanent MR system which has 27.9 cm pole-to-pole opening with flat gradients (40 mT/m) running under a TMX NRC console. The distance from the magnet isocenter to the linac target is 80 cm. The authors' design has resolved the mutual interferences between the two devices such that the MR magnetic field does not interfere with the trajectory of the electron in the linac waveguide, and the radiofrequency (RF) signals from each system do not interfere with the operation of the other system. Magnetic and RF shielding calculations were performed and confirmed with appropriate measurements. The prototype is currently on a fixed gantry; however, in the very near future, the linac and MR magnet will rotate in unison such that the linac is always aimed through the opening in the biplanar magnet. MR imaging was found to be fully operational during linac irradiation and proven by imaging a phantom with conventional gradient echo sequences. Except for small changes in SNR, MR images produced during irradiation were visually and quantitatively very similar to those taken with the linac turned off. This prototype system provides proof of concept that the design has decreased the mutual interferences sufficiently to allow the development of real-time MR-guided radiotherapy. Low field-strength systems (0.2-0.5 T) have been used clinically as diagnostic tools. The task of the linac-MR system is, however, to provide MR guidance to the radiotherapy beam. Therefore, the 0.2 T field strength would provide adequate image quality for this purpose and, with the addition of fast imaging techniques, has the potential to provide 4D soft-tissue visualization not presently available in image-guided radiotherapy systems. The authors' initial design incorporates a permanent magnet; however, other types of magnets and field strengths could also be incorporated. Usable MR images were obtained during linac irradiation from the linac-MR prototype. The authors' prototype design can be used as the functional starting point in developing real-time MR guidance offering soft-tissue contrast that can be coupled with tumor tracking for real-time adaptive radiotherapy.

  16. Terahertz relativistic spatial solitons in doped graphene metamaterials

    E-Print Network [OSTI]

    Haiming Dong; Claudio Conti; Fabio Biancalana

    2011-07-28

    We propose an electrically tunable graphene-based metamaterial showing a large nonlinear optical response at THz frequencies, which we calculate analytically for the first time to our knowledge and arises from the intraband current. The structure sustains a novel type of stable two-dimensional spatial solitary wave, a relativistic version of the Townes soliton. These results can be also applied to any material exhibiting a conical dispersion with massless Dirac fermions.

  17. Use of Spatial Archetypes for Optimized Energy Performance 

    E-Print Network [OSTI]

    Primikiri, E.; Kokkolaras, M.; Papalambros, P. Y.

    2005-01-01

    .C. Winkelmann, C.O. Pedersen, “Energyplus: Energy Simulation Program.” ASHRAE Journal. 42, no. 4 (April 2000): 49-56. De Chiara, Joseph , Time-saver standards for building, McGraw-Hill 4th edition, New York 2001. Fellini R., A Model-Based Methodology... USE OF SPATIAL ARCHETYPES FOR OPTIMIZED ENERGY PERFORMANCE Eleni Primikiri, Department of Architecture, University Campus, University of Patras, Rion, Greece, 26500 Michael Kokkolaras, Panos Papalambros, Department of Mechanical...

  18. Local thermal observables in spatially open FRW spaces

    E-Print Network [OSTI]

    Slava Emelyanov

    2014-10-27

    Certain local thermal observables are considered in well-known examples of spatially open FRW spaces: Milne, open de Sitter and anti de Sitter as well as Einstein static universes. Another value for fixing the ambiguity in defining the Wick square and, hence, the local temperature is motivated in the last example. Physical consequences of that choice are discussed for static and conformal vacua in those spaces.

  19. Fluctuations of Spatial Patterns as a Measure of Classical Chaos

    E-Print Network [OSTI]

    Zhen Cao; Rudolph C. Hwa

    1997-02-10

    In problems where the temporal evolution of a nonlinear system cannot be followed, a method for studying the fluctuations of spatial patterns has been developed. That method is applied to well-known problems in deterministic chaos (the logistic map and the Lorenz model) to check its effectiveness in characterizing the dynamical behaviors. It is found that the indices $\\mu _q$ are as useful as the Lyapunov exponents in providing a quantitative measure of chaos.

  20. Wide band focusing x-ray spectrograph with spatial resolution

    SciTech Connect (OSTI)

    Pikuz, S. A.; Douglass, J. D.; Shelkovenko, T. A.; Sinars, D. B.; Hammer, D. A.

    2008-01-15

    A new, wide spectral bandwidth x-ray spectrograph, the wide-bandwidth focusing spectrograph with spatial resolution (WB-FSSR), based on spherically bent mica crystals, is described. The wide bandwidth is achieved by combining three crystals to form a large aperture dispersive element. Since the WB-FSSR covers a wide spectral band, it is very convenient for application as a routine diagnostic tool in experiments in which the desired spectral coverage is different from one test to the next. The WB-FSSR has been tested in imploding wire-array experiments on a 1 MA pulsed power machine, and x-ray spectra were recorded in the 1-20 A spectral band using different orders of mica crystal reflection. Using a two mirror-symmetrically placed WB-FSSR configuration, it was also possible to distinguish between a real spectral shift and a shift of recorded spectral lines caused by the spatial distribution of the radiating plasma. A spectral resolution of about 2000 was demonstrated and a spatial resolution of {approx}100 {mu}m was achieved in the spectral band of 5-10 A in second order of mica reflection. A simple method of numerical analysis of spectrograph capability is proposed.

  1. Methods for spectral image analysis by exploiting spatial simplicity

    DOE Patents [OSTI]

    Keenan, Michael R.

    2010-05-25

    Several full-spectrum imaging techniques have been introduced in recent years that promise to provide rapid and comprehensive chemical characterization of complex samples. One of the remaining obstacles to adopting these techniques for routine use is the difficulty of reducing the vast quantities of raw spectral data to meaningful chemical information. Multivariate factor analysis techniques, such as Principal Component Analysis and Alternating Least Squares-based Multivariate Curve Resolution, have proven effective for extracting the essential chemical information from high dimensional spectral image data sets into a limited number of components that describe the spectral characteristics and spatial distributions of the chemical species comprising the sample. There are many cases, however, in which those constraints are not effective and where alternative approaches may provide new analytical insights. For many cases of practical importance, imaged samples are "simple" in the sense that they consist of relatively discrete chemical phases. That is, at any given location, only one or a few of the chemical species comprising the entire sample have non-zero concentrations. The methods of spectral image analysis of the present invention exploit this simplicity in the spatial domain to make the resulting factor models more realistic. Therefore, more physically accurate and interpretable spectral and abundance components can be extracted from spectral images that have spatially simple structure.

  2. Methods for spectral image analysis by exploiting spatial simplicity

    DOE Patents [OSTI]

    Keenan, Michael R. (Albuquerque, NM)

    2010-11-23

    Several full-spectrum imaging techniques have been introduced in recent years that promise to provide rapid and comprehensive chemical characterization of complex samples. One of the remaining obstacles to adopting these techniques for routine use is the difficulty of reducing the vast quantities of raw spectral data to meaningful chemical information. Multivariate factor analysis techniques, such as Principal Component Analysis and Alternating Least Squares-based Multivariate Curve Resolution, have proven effective for extracting the essential chemical information from high dimensional spectral image data sets into a limited number of components that describe the spectral characteristics and spatial distributions of the chemical species comprising the sample. There are many cases, however, in which those constraints are not effective and where alternative approaches may provide new analytical insights. For many cases of practical importance, imaged samples are "simple" in the sense that they consist of relatively discrete chemical phases. That is, at any given location, only one or a few of the chemical species comprising the entire sample have non-zero concentrations. The methods of spectral image analysis of the present invention exploit this simplicity in the spatial domain to make the resulting factor models more realistic. Therefore, more physically accurate and interpretable spectral and abundance components can be extracted from spectral images that have spatially simple structure.

  3. Feature Shape and Elevation Based Road Classification and Extraction on High Spatial

    E-Print Network [OSTI]

    Carbonara, Joaquin

    Feature Shape and Elevation Based Road Classification and Extraction on High Spatial Resolution #12; 2 Abstract: Classification and extraction of geospatial features from high spatial resolution. However, the conventional method of human interpretation and digitizing cannot fulfill the requirements

  4. Spatial qualities of innovation districts : how Third Places are changing the innovation ecosystem of Kendall Square

    E-Print Network [OSTI]

    Kim, Minjee

    2013-01-01

    This thesis analyzes the spatial dimensions of an urban high-tech cluster in the changing socio-economic landscape of American cities. Using Kendall Square as the primary case study, I analyzed the spatial qualities and ...

  5. Decentralized spatial data mining for geosensor Patrick Laube and Matt Duckham

    E-Print Network [OSTI]

    Duckham, Matt

    Decentralized spatial data mining for geosensor networks Patrick Laube and Matt Duckham Department data. Conventional spatiotemporal data mining procedures, however, are based on centralized models four strategies for decentralized spatial data mining, illustrating the concept of decentralization

  6. Self-Organizing Map and Axial Spatial Arrangement Topological Mapping of Alternative Designs

    E-Print Network [OSTI]

    Self-Organizing Map and Axial Spatial Arrangement Topological Mapping of Alternative Designs and Axial Spatial Arrangement:Topological Mapping of Alternative Designs properties of the objects alternatives, make it difficult to compare alternatives, and require tedious user intervention. One

  7. GIS and Spatial Analysis: Report on the Specialist Meeting (92-11)

    E-Print Network [OSTI]

    Fotheringham, A. Stewart; Rogerson, Peter editors

    1992-01-01

    Proposals. 1. How can spatial analysis assist GIS? 2.How can GIS assist spatial analysis? To give a sense of theunit problem and how can a GIS help in better understanding

  8. Spatial Data Management for Computer-Aided Design Hans-Peter Kriegel1

    E-Print Network [OSTI]

    Kriegel, Hans-Peter

    }@informatik.uni-muenchen.de 2 Volkswagen AG andreas5.mueller@volkswagen.de Abstract This demonstration presents a spatial

  9. A Problem of Powers and the Product of Spatial Product Systems

    E-Print Network [OSTI]

    Bhat, B V Rajarama; Skeide, Michael

    2008-01-01

    In the 2002 AMS summer conference on ``Advances in Quantum Dynamics'' in Mount Holyoke Robert Powers proposed a sum operation for spatial E0-semigroups. Still during the conference Skeide showed that the Arveson system of that sum is the product of spatial Arveson systems. This product may but need not coincide with the tensor product of Arveson systems. The Powers sum of two spatial E0-semigroups is, therefore, up to cocycle conjugacy Skeide's product of spatial noises.

  10. The Sensitivity of DPF Performance to the Spatial Distribution of Ash Generated from Six Lubricant Formulations

    Broader source: Energy.gov [DOE]

    Discusses potential of DPF pressure drop reduction by optimizing the spatial distribution of ash inside DPF inlet channel

  11. Generation region of pulsating aurora obtained simultaneously by the FAST satellite and a Syowa-Iceland conjugate pair of observatories

    E-Print Network [OSTI]

    California at Berkeley, University of

    Generation region of pulsating aurora obtained simultaneously by the FAST satellite and a Syowa-Iceland), with reference to simultaneous data obtained by a Syowa-Iceland conjugate pair of observatories. The aurora simultaneously by the FAST satellite and a Syowa-Iceland conjugate pair of observatories, J. Geophys. Res., 109

  12. Algorithm for obtaining the gradient expansion of the local density of states and the free energy of a superconductor

    E-Print Network [OSTI]

    Algorithm for obtaining the gradient expansion of the local density of states and the free energy for obtaining the gauge-invariant gradient expansion of the local density of states and the free energy confirm a recent calculation of the fourth order correction to the free energy by Kosztin, Kos, Stone

  13. Spatially resolved characterization of biogenic manganese oxideproduction within a bacterial biofilm

    SciTech Connect (OSTI)

    Toner, Brandy; Fakra, Sirine; Villalobos, Mario; Warwick, Tony; Sposito, Garrison

    2004-10-01

    Pseudomonas putida strain MnB1, a biofilm forming bacteria, was used as a model for the study of bacterial Mn oxidation in freshwater and soil environments. The oxidation of Mn{sub (aq)}{sup +2} by P. putida was characterized by spatially and temporally resolving the oxidation state of Mn in the presence of a bacterial biofilm using scanning transmission x-ray microscopy (STXM) combined with near edge x-ray absorption fine structure (NEXAFS) spectroscopy at the Mn-L{sub 2,3} absorption edges. Subsamples were collected from growth flasks containing 0.1 mM and 1 mM total Mn at 16, 24, 36 and 48 hours after inoculation. Immediately after collection, the unprocessed hydrated subsamples were imaged at 40 nm resolution. Manganese NEXAFS spectra were extracted from x-ray energy sequences of STXM images (stacks) and fit with linear combinations of well characterized reference spectra to obtain quantitative relative abundances of Mn(II), Mn(III) and Mn(IV). Careful consideration was given to uncertainty in the normalization of the reference spectra, choice of reference compounds, and chemical changes due to radiation damage. The STXM results confirm that Mn{sub (aq)}{sup +2} was removed from solution by P. putida and was concentrated as Mn(III) and Mn(IV) immediately adjacent to the bacterial cells. The Mn precipitates were completely enveloped by bacterial biofilm material. The distribution of Mn oxidation states was spatially heterogeneous within and between the clusters of bacterial cells. Scanning transmission x-ray microscopy is a promising tool to advance the study of hydrated interfaces between minerals and bacteria, particularly in cases where the structure of bacterial biofilms needs to be maintained.

  14. Autologistic Regression Analysis of Spatial-Temporal Binary Data via Monte Carlo

    E-Print Network [OSTI]

    Aukema, Brian

    Autologistic Regression Analysis of Spatial-Temporal Binary Data via Monte Carlo Maximum Likelihood regression analysis of binary data that are measured on a spatial lattice and repeatedly over discrete time points. We propose a spatial- temporal autologistic regression model and draw statistical inference via

  15. Some Dynamic Graphics for Spatial Data with Multiple Attributes in a GIS

    E-Print Network [OSTI]

    Symanzik, Jürgen

    Some Dynamic Graphics for Spatial Data with Multiple Attributes in a GIS Dianne Cook1, Noel Cressie, USA 2 GIS Support and Research Facility, Iowa State University dicook@iastate.edu Abstract. This paper with the spatial data base management and spatial functionalities of a Geographic Information System GIS. A GIS

  16. GIS and Spatial Agent-Based Model Simulations for Sustainable Development

    E-Print Network [OSTI]

    George Mason University

    1 GIS and Spatial Agent-Based Model Simulations for Sustainable Development Claudio Cioffi-Revilla1 and climate. This paper explains the needs and demand for GIS in these types of agent-based models with GIS for representing spatial features. Keywords: geographic information systems (GIS), spatial agent

  17. Preparing photon pairs entangled in any desired spatial modes via interference

    E-Print Network [OSTI]

    Galvez, Enrique J. "Kiko"

    Department of Physics and Astronomy, Colgate University, 13 Oak Drive, Hamilton, New York 13346, U in energy-momentum,1 polarization,2,3 and spatial mode.4 Spatial-mode entanglement involves the use high, but not the only alternative. After the spatial filter the pairs are in a product state: |u = |u0 1|u0 2. (2

  18. Sensitivity of Harmonic Injection and its Spatial Evolution for Nonlinear Distortion Suppression in a TWT

    E-Print Network [OSTI]

    Singh, Aarti

    Sensitivity of Harmonic Injection and its Spatial Evolution for Nonlinear Distortion Suppression presents an experimental investigation of the spatial evolution and sensitivity of third-order nonlinear injection without injection (d) Output Fig. 1 Spatial evolution of the wave spectrum along the TWT axis

  19. G E O M A T I C A VISUAL MODELLING OF SPATIAL DATABASES

    E-Print Network [OSTI]

    G E O M A T I C A VISUAL MODELLING OF SPATIAL DATABASES: TOWARDS SPATIAL PVL AND UML - Yvan Bédard of the art in spatial database modelling. In particular, it discusses visual languages and related research of visual database modelling. Visual database modelling helps us to under- stand and to describe more

  20. DISSERTATION Investigation of Spatial Variations in Collection Efficiency of Solar Cells

    E-Print Network [OSTI]

    Sites, James R.

    DISSERTATION Investigation of Spatial Variations in Collection Efficiency of Solar Cells Submitted BY JASON F. HILTNER ENTITLED INVESTIGATION OF SPATIAL VARIATIONS IN COLLECTION EFFICIENCY OF SOLAR CELLS OF SOLAR CELLS In an effort to investigate spatial variations in solar cells, an apparatus which is capable

  1. Author's personal copy Temporal and spatial trends of total petroleum hydrocarbons in the seawater

    E-Print Network [OSTI]

    Ma, Lena

    Author's personal copy Temporal and spatial trends of total petroleum hydrocarbons in the seawater hydrocarbons Bohai Bay Temporal and spatial trends Seawater a b s t r a c t The temporal and spatial distribution of total petroleum hydrocarbons (TPH) in the seawater of Tianjin Bohai Bay during 1996

  2. Generalized Multivariate Rank Type Test Statistics via Spatial U-Quantiles

    E-Print Network [OSTI]

    Serfling, Robert

    Generalized Multivariate Rank Type Test Statistics via Spatial U-Quantiles Weihua Zhou1 University for location have been extended over the years to the multivariate setting, including recent robust rotation invariant "spatial" versions. Here we introduce a broad class of rotation invariant multivariate spatial

  3. ECOGRAPHY 25: 601615, 2002 The consequences of spatial structure for the design and analysis

    E-Print Network [OSTI]

    Fortin, Marie Josee

    ECOGRAPHY 25: 601­615, 2002 The consequences of spatial structure for the design and analysis. 2002. The consequences of spatial structure for the design and analysis of ecological field surveys taught to rely on systematic or random sampling designs. If there is prior knowledge about the spatial

  4. Fourier based statistics for irregular spaced spatial data Suhasini Subba Rao

    E-Print Network [OSTI]

    Subba Rao, Suhasini

    Fourier based statistics for irregular spaced spatial data Suhasini Subba Rao Department A class of Fourier based statistics for irregular spaced spatial data is introduced, examples include. The Fourier based statistic is a quadratic form of a discrete Fourier- type transform of the spatial data

  5. Spatial Equilibrium Modeling with Imperfectly Competitive Markets: An Application to Rice Trade

    E-Print Network [OSTI]

    McCarl, Bruce A.

    when all trading countries comply with the free trade agreement. #12;1 Spatial Equilibrium ModelingSpatial Equilibrium Modeling with Imperfectly Competitive Markets: An Application to Rice Trade Chi: An Application to Rice Trade Abstract A general imperfect competition spatial equilibrium model is developed

  6. Beam control in multiphoton microscopy using a MEMS spatial light Thomas Bifano*, Hari Paudel

    E-Print Network [OSTI]

    Bifano, Thomas

    . The combination of MPM and a fast microelectromechanical spatial light modulator (MEMS SLM) offers a compellingBeam control in multiphoton microscopy using a MEMS spatial light modulator Thomas Bifano*, Hari instrument. S-MPM's imaging advantages are enabled by a high-speed, microelectromechanical spatial light

  7. Four-Dimensional Spatial Reasoning in Humans T. N. Aflalo and M. S. A. Graziano

    E-Print Network [OSTI]

    Graziano, Michael

    University Human subjects practiced navigation in a virtual, computer-generated maze that contained 4 spatial on the species of animal. In humans, the ability to perform mental spatial rotation has long been establishedFour-Dimensional Spatial Reasoning in Humans T. N. Aflalo and M. S. A. Graziano Princeton

  8. SPATIAL PRECIPITATION TRENDS AND EFFECTS OF CLIMATE CHANGE ON THE HAWAI'IAN HUALALAI AQUIFER

    E-Print Network [OSTI]

    Anderson, Charles W.

    THESIS SPATIAL PRECIPITATION TRENDS AND EFFECTS OF CLIMATE CHANGE ON THE HAWAI'IAN HUALALAI AQUIFER;Copyright by Alyssa Danielle Hendricks 2015 All Rights Reserved #12;ii ABSTRACT SPATIAL PRECIPITATION TRENDS and understood spatially and temporally at a multitude of scales, trends in precipitation are less understood

  9. SU-E-T-354: Peak Temperature Ratio of TLD Glow Curves to Investigate the Spatial Dependence of LET in a Clinical Proton Beam

    SciTech Connect (OSTI)

    Reft, C [UniversityChicago, Chicago, IL (United States); Pankuch, M; Ramirez, H [ProCure Treatment Centers, Warrenville, IL (United States)

    2014-06-01

    Purpose: Use the ratio of the two high temperature peaks (HTR) in TLD 700 glow curves to investigate spatial dependence of the linear energy transfer (LET) in proton beams. Studies show that the relative biological effectiveness (RBE) depends upon the physical dose as well as its spatial distribution. Although proton therapy uses a spatially invariant RBE of 1.1, studies suggest that the RBE increases in the distal edge of a spread out Bragg peak (SOBP) due to the increased LET. Methods: Glow curve studies in TLD 700 show that the 280 C temperature peak is more sensitive to LET radiation than the 210 C temperature peak. Therefore, the areas under the individual temperature peaks for TLDs irradiated in a proton beam normalized to the peak ratio for 6 MV photons are used to determine the HTR to obtain information on its LET. TLD 700 chips with dimensions 0.31×0.31×0.038 cc are irradiated with 90 MeV protons at varying depths in a specially designed blue wax phantom to investigate LET spatial dependence. Results: Five TLDs were placed at five different depths of the percent depth dose curve (PDD) of range 16.2 cm: center of the SOPB and approximately at the 99% distal edge, 90%, 75% and 25% of the PDD, respectively. HTR was 1.3 at the center of the SOBP and varied from 2.2 to 3.9 which can be related to an LET variation from 0.5 to 18 KeV/? via calibration with radiation beams of varying LET. Conclusion: HTR data show a spatially invariant LET slightly greater than the 6 MV radiations in the SOBP, but a rapidly increasing LET at the end of the proton range. These results indicate a spatial variation in RBE with potential treatment consequences when selecting treatment margins to minimize the uncertainties in proton RBE.

  10. Spatial statistics for predicting flow through a rock fracture

    SciTech Connect (OSTI)

    Coakley, K.J.

    1989-03-01

    Fluid flow through a single rock fracture depends on the shape of the space between the upper and lower pieces of rock which define the fracture. In this thesis, the normalized flow through a fracture, i.e. the equivalent permeability of a fracture, is predicted in terms of spatial statistics computed from the arrangement of voids, i.e. open spaces, and contact areas within the fracture. Patterns of voids and contact areas, with complexity typical of experimental data, are simulated by clipping a correlated Gaussian process defined on a N by N pixel square region. The voids have constant aperture; the distance between the upper and lower surfaces which define the fracture is either zero or a constant. Local flow is assumed to be proportional to local aperture cubed times local pressure gradient. The flow through a pattern of voids and contact areas is solved using a finite-difference method. After solving for the flow through simulated 10 by 10 by 30 pixel patterns of voids and contact areas, a model to predict equivalent permeability is developed. The first model is for patterns with 80% voids where all voids have the same aperture. The equivalent permeability of a pattern is predicted in terms of spatial statistics computed from the arrangement of voids and contact areas within the pattern. Four spatial statistics are examined. The change point statistic measures how often adjacent pixel alternate from void to contact area (or vice versa ) in the rows of the patterns which are parallel to the overall flow direction. 37 refs., 66 figs., 41 tabs.

  11. Dynamical Analysis of Scalar Field Cosmologies with Spatial Curvature

    E-Print Network [OSTI]

    Mateja Gosenca; Peter Coles

    2015-02-13

    We explore the dynamical behaviour of cosmological models involving a scalar field (with an exponential potential and a canonical kinetic term) and a matter fluid with spatial curvature included in the equations of motion. Using appropriately defined parameters to describe the evolution of the scalar field energy in this situation, we find that there are two extra fixed points that are not present in the case without curvature. We also analyse the evolution of the effective equation-of-state parameter for different initial values of the curvature.

  12. Solid phases of spatially nanoconfined oxygen: A neutron scattering study

    SciTech Connect (OSTI)

    Kojda, Danny [Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 14109 Berlin (Germany) [Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 14109 Berlin (Germany); Freie Universität Berlin, 14195 Berlin (Germany); Wallacher, Dirk; Hofmann, Tommy, E-mail: tommy.hofmann@helmholtz-berlin.de [Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 14109 Berlin (Germany)] [Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 14109 Berlin (Germany); Baudoin, Simon; Hansen, Thomas [Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9 (France)] [Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9 (France); Huber, Patrick [Technische Universität Hamburg-Harburg, 21073 Hamburg (Germany)] [Technische Universität Hamburg-Harburg, 21073 Hamburg (Germany)

    2014-01-14

    We present a comprehensive neutron scattering study on solid oxygen spatially confined in 12 nm wide alumina nanochannels. Elastic scattering experiments reveal a structural phase sequence known from bulk oxygen. With decreasing temperature cubic ?-, orthorhombic ?- and monoclinic ?-phases are unambiguously identified in confinement. Weak antiferromagnetic ordering is observed in the confined monoclinic ?-phase. Rocking scans reveal that oxygen nanocrystals inside the tubular channels do not form an isotropic powder. Rather, they exhibit preferred orientations depending on thermal history and the very mechanisms, which guide the structural transitions.

  13. Thin film solar cell including a spatially modulated intrinsic layer

    DOE Patents [OSTI]

    Guha, Subhendu (Troy, MI); Yang, Chi-Chung (Troy, MI); Ovshinsky, Stanford R. (Bloomfield Hills, MI)

    1989-03-28

    One or more thin film solar cells in which the intrinsic layer of substantially amorphous semiconductor alloy material thereof includes at least a first band gap portion and a narrower band gap portion. The band gap of the intrinsic layer is spatially graded through a portion of the bulk thickness, said graded portion including a region removed from the intrinsic layer-dopant layer interfaces. The band gap of the intrinsic layer is always less than the band gap of the doped layers. The gradation of the intrinsic layer is effected such that the open circuit voltage and/or the fill factor of the one or plural solar cell structure is enhanced.

  14. Assessing Cloud Spatial and Vertical Distribution with Infrared Cloud Analyzer

    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 WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B L O O DBiomass and Biofuels BiomassAssembly of aCloud Spatial and

  15. Single beam write and/or replay of spatial heterodyne holograms

    DOE Patents [OSTI]

    Thomas, Clarence E. (Knoxville, TN); Hanson, Gregory R. (Clinton, TN)

    2007-11-20

    A method of writing a spatially heterodyne hologram having spatially heterodyne fringes includes: passing a single write beam through a spatial light modulator that digitally modulates said single write beam; and focusing the single write beam at a focal plane of a lens to impose a holographic diffraction grating pattern on the photorefractive crystal, the holographic diffraction grating pattern including the spatially heterodyne hologram having spatially heterodyne fringes, wherein only said single write beam is incident on said photorefractive crystal without a reference beam. A method of replaying a spatially heterodyne hologram having spatially heterodyne fringes at a replay angle includes: illuminating a photorefractive crystal having a holographic diffraction grating with a beam from a laser at an illumination angle, the holographic diffraction grating pattern including the spatially heterodyne hologram having spatially heterodyne fringes, wherein a difference between said illumination angle and said replay angle defines a diffraction angle .alpha. that is a function of a plane wave mathematically added to original object wave phase and amplitude data of said spatially heterodyne hologram having spatially heterodyne fringes.

  16. Quantum Brachistochrone Curves as Geodesics: Obtaining Accurate Minimum-Time Protocols for the Control of Quantum Systems

    E-Print Network [OSTI]

    Wang, Xiaoting

    Most methods of optimal control cannot obtain accurate time-optimal protocols. The quantum brachistochrone equation is an exception, and has the potential to provide accurate time-optimal protocols for a wide range of ...

  17. For economic energy, we need: tritium, large size to obtain hot fusing plasma; high fields and large currents

    E-Print Network [OSTI]

    11 For economic energy, we need: tritium, large size to obtain hot fusing plasma; high fields: a Component Test Facility is much needed; ST appears simplest and most economic in tritium: BUT the high cost

  18. Abstract. The use of object-orientation for both spatial data and spatial process models facilitates their integration, which can allow exploration

    E-Print Network [OSTI]

    Brown, Daniel G.

    process and data models: Toward integration of agent-based models and GIS Daniel G. Brown1,3 , Rick Riolo3Abstract. The use of object-orientation for both spatial data and spatial process models (fields and objects) and agent-based process models can interact: identity, causal, temporal

  19. System for obtaining smooth laser beams where intensity variations are reduced by spectral dispersion of the laser light (SSD)

    DOE Patents [OSTI]

    Skupsky, S.; Kessler, T.J.; Short, R.W.; Craxton, S.; Letzring, S.A.; Soures, J.

    1991-09-10

    In an SSD (smoothing by spectral dispersion) system which reduces the time-averaged spatial variations in intensity of the laser light to provide uniform illumination of a laser fusion target, an electro-optic phase modulator through which a laser beam passes produces a broadband output beam by imposing a frequency modulated bandwidth on the laser beam. A grating provides spatial and angular spectral dispersion of the beam. Due to the phase modulation, the frequencies (''colors'') cycle across the beam. The dispersed beam may be amplified and frequency converted (e.g., tripled) in a plurality of beam lines. A distributed phase plate (DPP) in each line is irradiated by the spectrally dispersed beam and the beam is focused on the target where a smooth (uniform intensity) pattern is produced. The color cycling enhances smoothing and the use of a frequency modulated laser pulse prevents the formation of high intensity spikes which could damage the laser medium in the power amplifiers. 8 figures.

  20. Spatial confinement of the IBEX Ribbon: A dominant turbulence mechanism

    SciTech Connect (OSTI)

    Isenberg, Philip A.

    2014-05-20

    The narrow ribbon of enhanced energetic neutral atom flux observed by the Interstellar Boundary Explorer spacecraft has prompted numerous ideas to explain its structure and properties. One of these ideas is the 'neutral solar wind' scenario, which identifies the source particles as pickup protons in the local interstellar medium originating in solar wind charge-exchange interactions. This scenario has been thought to require unrealistically weak pitch-angle scattering of the pickup protons to explain the narrow structure. Recently, Schwadron and McComas suggested that this structure could result from a spatial retention of the pickup protons, rather than from a restricted pitch-angle distribution. Here, we present a physically motivated, quantitative mechanism to produce such a spatial configuration. This mechanism is based on the 'dominant turbulence' assumption, which can be applied where the production of new pickup protons is slow, and has been used to successfully explain the level of turbulent heating observed in the outer solar wind. This formalism predicts a pickup isotropization process which adds or subtracts energy from the ambient turbulent fluctuations, depending on the initial pitch angle of the pickup protons. We show that a simple model of this process can yield a ribbon structure in qualitative agreement with the observations. The results of this simple model are not yet quantitatively satisfactory, but we suggest several improvements which may reduce the quantitative discrepancy.

  1. Spatially-resolved microstructure in shear banding wormlike micellar solutions

    SciTech Connect (OSTI)

    Helgeson, Matthew E.; Reichert, Matthew D.; Wagner, Norman J.; Kaler, Eric W. [Department of Chemical Engineering, University of Delaware, Newark, DE 19716 (United States)

    2008-07-07

    Recently proposed theories for shear banding in wormlike micellar solutions (WLMs) rely on a shear-induced isotropic-nematic (I-N) phase separation as the mechanism for banding. Critical tests of such theories require spatially-resolved measurements of flow-kinematics and local mesoscale microstructure within the shear bands. We have recently developed such capabilities using a short gap Couette cell for flow-small angle neutron scattering (flow-SANS) measurements in the 1-2 plane of shear with collaborators at the NIST Center for Neutron Research. This work combines flow-SANS measurements with rheology, rheo-optics and velocimetry measurements to present the first complete spatially-resolved study of WLMs through the shear banding transition for a model shear banding WLM solution near the I-N phase boundary. The shear rheology is well-modeled by the Giesekus constitutive equation, with incorporated stress diffusion to predict shear banding. By fitting the stress diffusivity at the onset of banding, the model enables prediction of velocity profiles in the shear banded state which are in quantitative agreement with measured flow-kinematics. Quantitative analysis of the flow-SANS measurements shows a critical segmental alignment for banding and validates the Giesekus model predictions, linking segmental orientation to shear banding and providing the first rigorous evidence for the shear-induced I-N transition mechanism for shear banding.

  2. Optimization of collective enzyme activity via spatial localization

    E-Print Network [OSTI]

    Alexander Buchner; Filipe Tostevin; Florian Hinzpeter; Ulrich Gerland

    2013-10-11

    The spatial organization of enzymes often plays a crucial role in the functionality and efficiency of enzymatic pathways. To fully understand the design and operation of enzymatic pathways, it is therefore crucial to understand how the relative arrangement of enzymes affects pathway function. Here we investigate the effect of enzyme localization on the flux of a minimal two-enzyme pathway within a reaction-diffusion model. We consider different reaction kinetics, spatial dimensions, and loss mechanisms for intermediate substrate molecules. Our systematic analysis of the different regimes of this model reveals both universal features and distinct characteristics in the phenomenology of these different systems. In particular, the distribution of the second pathway enzyme that maximizes the reaction flux undergoes a generic transition from co-localization with the first enzyme when the catalytic efficiency of the second enzyme is low, to an extended profile when the catalytic efficiency is high. However, the critical transition point and the shape of the extended optimal profile is significantly affected by specific features of the model. We explain the behavior of these different systems in terms of the underlying stochastic reaction and diffusion processes of single substrate molecules.

  3. Low Voltage High Precision Spatial Light ModulatorsFinal Report

    SciTech Connect (OSTI)

    Papavasiliou, A P

    2005-02-09

    The goal of this project was to make LLNL a leader in Spatial Light Modulators (SLMs) by developing the technology that will be needed by the next generation of SLMs. We would use new lower voltage actuators and bond those actuators directly to controlling circuitry to break the fundamental limitations that constrain current SLM technology. This three-year project was underfunded in the first year and not funded in the second year. With the funding that was available, we produced actuators and designs for the controlling circuitry that would have been integrated in the second year. Spatial light modulators (SLMs) are arrays of tiny movable mirrors that modulate the wave-fronts of light. SLMs can correct aberrations in incoming light for adaptive optics or modulate light for beam control, optical communication and particle manipulation. MicroElectroMechanical Systems (MEMS) is a technology that utilizes the microfabrication tools developed by the semiconductor industry to fabricate a wide variety of tiny machines. The first generation of MEMS SLMs have improved the functionality of SLMs while drastically reducing per pixel cost making arrays on the order of 1000 pixels readily available. These MEMS SLMs however are limited by the nature of their designs to be very difficult to scale above 1000 pixels and have very limited positioning accuracy. By co-locating the MEMS mirrors with CMOS electronics, we will increase the scalability and positioning accuracy. To do this we will have to make substantial advances in SLM actuator design, and fabrication.

  4. The effect of different annealing temperatures on tin and cadmium telluride phases obtained by a modified chemical route

    SciTech Connect (OSTI)

    Mesquita, Anderson Fuzer; Porto, Arilza de Oliveira; Magela de Lima, Geraldo; Paniago, Roberto; Ardisson, José Domingos

    2012-11-15

    Graphical abstract: Display Omitted Highlights: ? Synthesis of cadmium and tin telluride. ? Chemical route to obtain pure crystalline cadmium and tin telluride. ? Effect of the annealing temperature on the crystalline phases. ? Removal of tin oxide as side product through thermal treatment. -- Abstract: In this work tin and cadmium telluride were prepared by a modification of a chemical route reported in the literature to obtain metallacycles formed by oxidative addition of tin-tellurium bonds to platinum (II). Through this procedure it was possible to obtain tin and cadmium telluride. X-ray diffraction and X-ray photoelectron spectroscopy were used to identify the crystalline phases obtained as well as the presence of side products. In the case of tin telluride it was identified potassium chloride, metallic tellurium and tin oxide as contaminants. The tin oxidation states were also monitored by {sup 119}Sn Mössbauer spectroscopy. The annealing in hydrogen atmosphere was chosen as a strategy to reduce the tin oxide and promote its reaction with the excess of tellurium present in the medium. The evolution of this tin oxide phase was studied through the annealing of the sample at different temperatures. Cadmium telluride was obtained with high degree of purity (98.5% relative weight fraction) according to the Rietveld refinement of X-ray diffraction data. The modified procedure showed to be very effective to obtain amorphous tin and cadmium telluride and the annealing at 450 °C has proven to be useful to reduce the amount of oxide produced as side product.

  5. Obtaining Disaster Assistance (Spanish) 

    E-Print Network [OSTI]

    Cavanagh, Joyce

    2008-09-24

    se le indique c?mo utilizar el dinero (por ejemplo, reparaciones y alquiler). Si FEMA determina que usted no resulta elegible para recibir asistencia, recibir? una carta en la que se le expliquen los motivos por los que le fue denegada la...

  6. Recording multiple spatially-heterodyned direct to digital holograms in one digital image

    DOE Patents [OSTI]

    Hanson, Gregory R. (Clinton, TN); Bingham, Philip R. (Knoxville, TN)

    2008-03-25

    Systems and methods are described for recording multiple spatially-heterodyned direct to digital holograms in one digital image. A method includes digitally recording, at a first reference beam-object beam angle, a first spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; Fourier analyzing the recorded first spatially-heterodyned hologram by shifting a first original origin of the recorded first spatially-heterodyned hologram to sit on top of a first spatial-heterodyne carrier frequency defined by the first reference beam-object beam angle; digitally recording, at a second reference beam-object beam angle, a second spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; Fourier analyzing the recorded second spatially-heterodyned hologram by shifting a second original origin of the recorded second spatially-heterodyned hologram to sit on top of a second spatial-heterodyne carrier frequency defined by the second reference beam-object beam angle; applying a first digital filter to cut off signals around the first original origin and define a first result; performing a first inverse Fourier transform on the first result; applying a second digital filter to cut off signals around the second original origin and define a second result; and performing a second inverse Fourier transform on the second result, wherein the first reference beam-object beam angle is not equal to the second reference beam-object beam angle and a single digital image includes both the first spatially-heterodyned hologram and the second spatially-heterodyned hologram.

  7. THE SPATIALLY RESOLVED H{alpha}-EMITTING WIND STRUCTURE OF P CYGNI

    SciTech Connect (OSTI)

    Balan, Aurelian; Tycner, C. [Department of Physics, Central Michigan University, Mount Pleasant, MI 48859 (United States); Zavala, R. T.; Benson, J. A.; Hutter, D. J. [US Naval Observatory, Flagstaff Station, 10391 W. Naval Observatory Rd., Flagstaff, AZ 86001 (United States); Templeton, M., E-mail: abalan@delta.ed, E-mail: c.tycner@cmich.ed, E-mail: bzavala@nofs.navy.mi, E-mail: jbenson@nofs.navy.mi, E-mail: djh@nofs.navy.mi, E-mail: matthewt@aavso.or [American Association of Variable Star Observers, 49 Bay State Road, Cambridge, MA 02138 (United States)

    2010-06-15

    High spatial resolution observations of the H{alpha}-emitting wind structure associated with the luminous blue variable star P Cygni were obtained with the Navy Prototype Optical Interferometer. These observations represent the most comprehensive interferometric data set on P Cyg to date. We demonstrate how the apparent size of the H{alpha}-emitting region of the wind structure of P Cyg compares between the 2005, 2007, and 2008 observing seasons and how this relates to the H{alpha} line spectroscopy. Using the data sets from 2005, 2007, and 2008 observing seasons, we fit a circularly symmetric Gaussian model to the interferometric signature from the H{alpha}-emitting wind structure of P Cyg. Based on our results, we conclude that the radial extent of the H{alpha}-emitting wind structure around P Cyg is stable at the 10% level. We also show how the radial distribution of the H{alpha} flux from the wind structure deviates from a Gaussian shape, whereas a two-component Gaussian model is sufficient to fully describe the H{alpha}-emitting region around P Cyg.

  8. Spatially distributed flame transfer functions for predicting combustion dynamics in lean premixed gas turbine combustors

    SciTech Connect (OSTI)

    Kim, K.T.; Lee, J.G.; Quay, B.D.; Santavicca, D.A.

    2010-09-15

    The present paper describes a methodology to improve the accuracy of prediction of the eigenfrequencies and growth rates of self-induced instabilities and demonstrates its application to a laboratory-scale, swirl-stabilized, lean-premixed, gas turbine combustor. The influence of the spatial heat release distribution is accounted for using local flame transfer function (FTF) measurements. The two-microphone technique and CH{sup *} chemiluminescence intensity measurements are used to determine the input (inlet velocity perturbation) and the output functions (heat release oscillation), respectively, for the local flame transfer functions. The experimentally determined local flame transfer functions are superposed using the flame transfer function superposition principle, and the result is incorporated into an analytic thermoacoustic model, in order to predict the linear stability characteristics of a given system. Results show that when the flame length is not acoustically compact the model prediction calculated using the local flame transfer functions is better than the prediction made using the global flame transfer function. In the case of a flame in the compact flame regime, accurate predictions of eigenfrequencies and growth rates can be obtained using the global flame transfer function. It was also found that the general response characteristics of the local FTF (gain and phase) are qualitatively the same as those of the global FTF. (author)

  9. Probe diagnostics of electron distributions in plasma with spatial and angular resolution

    SciTech Connect (OSTI)

    Demidov, V. I.; Kudryavtsev, A. A. [St. Petersburg State University, St. Petersburg 199034, Russia and ITMO University, Kronverkskiy pr. 49, St. Petersburg 197101 (Russian Federation)

    2014-09-15

    This paper discusses the spatial resolution that is required to study inhomogeneous, low-temperature plasmas and is based on a review of low-temperature plasma electron kinetics and methods for probe measurements of electron energy distribution functions (EEDFs). It is stated that EEDFs can be extracted from probe measurements by applying an appropriate probe theory. The Druyvesteyn formula is most commonly used for this extraction and has been used in numerous publications, but more general theory can be used for a wider range of gas pressures. It is demonstrated that the Druyvesteyn formula can be obtained from the general theory as a limiting case. This paper justifies the application of wall probes in plasma studies of an energetic part of EEDFs. This justification is made for an idealized probe. We briefly review the methods for studying anisotropic plasmas and their usefulness in plasma research. It is demonstrated that to determine anisotropic electron energy distribution functions, a planar, one-sided probe is most convenient.

  10. Determination and optimization of spatial samples for distributed measurements.

    SciTech Connect (OSTI)

    Huo, Xiaoming (Georgia Institute of Technology, Atlanta, GA); Tran, Hy D.; Shilling, Katherine Meghan; Kim, Heeyong (Georgia Institute of Technology, Atlanta, GA)

    2010-10-01

    There are no accepted standards for determining how many measurements to take during part inspection or where to take them, or for assessing confidence in the evaluation of acceptance based on these measurements. The goal of this work was to develop a standard method for determining the number of measurements, together with the spatial distribution of measurements and the associated risks for false acceptance and false rejection. Two paths have been taken to create a standard method for selecting sampling points. A wavelet-based model has been developed to select measurement points and to determine confidence in the measurement after the points are taken. An adaptive sampling strategy has been studied to determine implementation feasibility on commercial measurement equipment. Results using both real and simulated data are presented for each of the paths.

  11. Spatially Inhomogeneous Bimodal Inherent Structure in Simulated Liquid Water

    E-Print Network [OSTI]

    K. T. Wikfeldt; A. Nilsson; L. G. M. Pettersson

    2011-06-24

    In the supercooled regime at elevated pressure two forms of liquid water, high-density (HDL) and low-density (LDL), have been proposed to be separated by a coexistence line ending at a critical point, but a connection to ambient conditions has been lacking. Here we perform large-scale molecular dynamics simulations and demonstrate that the underlying potential energy surface gives a strictly bimodal characterization of the molecules at all temperatures as spatially inhomogeneous either LDL- or HDL-like with a 3:1 predominance for HDL at ambient conditions. The Widom line, indicating maximum fluctuations, coincides with a 1:1 distribution. Our results indicate a unified description of liquid water covering supercooled to ambient conditions in agreement with recent x-ray spectroscopy and scattering data.

  12. Ordering in spatial evolutionary games for pairwise collective strategy updates

    E-Print Network [OSTI]

    Szabo, Gyorgy; Varga, Melinda; Hanusovszky, Livia

    2010-01-01

    Evolutionary $2 \\times 2$ games are studied with players located on a square lattice. During the evolution the randomly chosen neighboring players try to maximize their collective income by adopting a random strategy pair with a probability dependent on the difference of their summed payoffs between the final and initial state assuming quenched strategies in their neighborhood. In the case of the anti-coordination game this system behaves alike an anti-ferromagnetic kinetic Ising model. Within a wide region of social dilemmas this dynamical rule supports the formation of similar spatial arrangement of the cooperators and defectors ensuring the optimum total payoff if the temptation to choose defection exceeds a threshold value dependent on the sucker's payoff. The comparison of the results with those achieved for pairwise imitation and myopic strategy updates has indicated the relevant advantage of pairwise collective strategy update in the maintenance of cooperation.

  13. Boosting cooperation by involving extortion in spatial Prisoner's dilemma

    E-Print Network [OSTI]

    Wu, Zhi-Xi

    2014-01-01

    We study the evolution of cooperation in spatial Prisoner's dilemma games with and without extortion by adopting aspiration-driven strategy updating rule. We focus explicitly on how the strategy updating manner (whether synchronous or asynchronous) and also the introduction of extortion strategy affect the collective outcome of the games. By means of Monte Carlo (MC) simulations as well as dynamical cluster techniques, we find that the involvement of extortioners facilitates the boom of cooperators in the population (and whom can always dominate the population if the temptation to defect is not too large) for both synchronous and asynchronous strategy updating, in stark contrast to the otherwise case, where cooperation is promoted for intermediate aspiration level with synchronous strategy updating, but is remarkably inhibited if the strategy updating is implemented asynchronously. We explain the results by configurational analysis and find that the presence of extortion leads to the checkerboard-like orderin...

  14. Laser beam temporal and spatial tailoring for laser shock processing

    DOE Patents [OSTI]

    Hackel, Lloyd (Livermore, CA); Dane, C. Brent (Livermore, CA)

    2001-01-01

    Techniques are provided for formatting laser pulse spatial shape and for effectively and efficiently delivering the laser energy to a work surface in the laser shock process. An appropriately formatted pulse helps to eliminate breakdown and generate uniform shocks. The invention uses a high power laser technology capable of meeting the laser requirements for a high throughput process, that is, a laser which can treat many square centimeters of surface area per second. The shock process has a broad range of applications, especially in the aerospace industry, where treating parts to reduce or eliminate corrosion failure is very important. The invention may be used for treating metal components to improve strength and corrosion resistance. The invention has a broad range of applications for parts that are currently shot peened and/or require peening by means other than shot peening. Major applications for the invention are in the automotive and aerospace industries for components such as turbine blades, compressor components, gears, etc.

  15. Using seismic inversions to obtain an internal mixing processes indicator for main-sequence solar-like stars

    E-Print Network [OSTI]

    Buldgen, G; Dupret, M A

    2015-01-01

    Determining accurate and precise stellar ages is a major problem in astrophysics. These determinations are either obtained through empirical relations or model-dependent approaches. Currently, seismic modelling is one of the best ways of providing accurate ages. However, current methods are affected by simplifying assumptions concerning mixing processes. In this context, providing new structural indicators which are less model-dependent and more sensitive to such processes is crucial. We build a new indicator for core conditions on the main sequence, which should be more sensitive to structural differences and applicable to older stars than the indicator t presented in a previous paper. We also wish to analyse the importance of the number and type of modes for the inversion, as well as the impact of various constraints and levels of accuracy in the forward modelling process that is used to obtain reference models for the inversion. First, we present a method to obtain new structural kernels and use them to bu...

  16. For graduation, students must obtain a grade of "C" or better in each mathematics course, each science course, and each Mechanical Engineering core course. Students must obtain a 2.0 GPA

    E-Print Network [OSTI]

    Fernandez, Eduardo

    science course, and each Mechanical Engineering core course. Students must obtain a 2.0 GPA in all Mechanical Engineering courses attempted. The department maintains a flowchart that lists all Mechanical Engineering courses (statics, dynamics, strength of materials, thermodynamics, fluid mechanics

  17. Received 12 Jul 2014 | Accepted 18 Dec 2014 | Published 22 Jan 2015 Ferroelectrically driven spatial carrier density

    E-Print Network [OSTI]

    Rappe, Andrew M.

    driven spatial carrier density modulation in graphene Christoph Baeumer1, Diomedes Saldana-Greco2, John

  18. Using Spatial Augment Reality for Appliance Design Stewart Von Itzstein, Bruce H.Thomas, Ross T. Smith

    E-Print Network [OSTI]

    Thomas, Bruce

    , and animations) and the physical space (physical prototypes and 3D printing). Spatial Augmented Reality (SAR

  19. Studies on design of a process for organo-refining of coal to obtain super clean coal

    SciTech Connect (OSTI)

    Sharma, C.S.; Sharma, D.K. [Indian Inst. of Tech., New Delhi (India). Centre for Energy Studies

    1999-08-01

    Organo-refining of coal results in refining the coal to obtain super clean coal and residual coal. Super clean coal may be used to obtain value added chemicals, products, and cleaner fuels from coal. In the present work, studies on the design of a semicontinuous process for organo-refining of one ton of coal have been made. The results are reported. This is only a cursory attempt for the design, and further studies may be required for designing this process for use in the development of a scaled-up process of organo-refining of coal.

  20. A Study of the Yield of Camphor and of Camphor Oil Obtained from the Laurus Camphora of Jamaica

    E-Print Network [OSTI]

    Weidlein, Edward Ray

    1910-05-15

    KU ScholarWorks | The University of Kansas Pre-1923 Dissertations and Theses Collection A Study of the Yield of Camphor and of Camphor Oil Obtained from the Laurus Camphora of Jamaica 1910 by Edward Ray Weidlein This work was digitized... of Master of Arts A STUDY OP THE YIELD OP CAMPHOR AND OP CAMPHOR OIL OBTAINED PROM THE LAURUS CAMPHORA OP JAMAICA A Thesis Presented to the Paeulty of the University of Kansas. By EDWARD R. WE1DLEIN, Candidate for the Degree of Master of Arts. R...

  1. A Simple Efficient Method for Obtaining the Binding Energy of Lithium Nucleus under the Hulthén and Inversely Quadratic Yukawa Potentials

    E-Print Network [OSTI]

    Nasrin. Salehi; Mahsa. Ghazvini

    2015-04-28

    In this paper, the binding energy of Lithium nucleus in a nonrelativistic model is obtained for the Hulth\\'en and the Inversely Quadratic Yukawa Potential. In order to that, we used the concept of supersymmetry to solving the Schr\\"odinger equation exact analytically. These potentials, due to their physical interpretations, are of interest within many areas of theoretical physics. The results of our model for all calculations show that the ground state binding energy of Lithium nucleus with these potentials are very close to the ones obtained in experiments.

  2. Multiscale spatial density smoothing: an application to large-scale radiological survey and anomaly detection

    E-Print Network [OSTI]

    Tansey, Wesley; Reinhart, Alex; Scott, James G

    2015-01-01

    We consider the problem of estimating a spatially varying density function, motivated by problems that arise in large-scale radiological survey and anomaly detection. In this context, the density functions to be estimated are the background gamma-ray energy spectra at sites spread across a large geographical area, such as nuclear production and waste-storage sites, military bases, medical facilities, university campuses, or the downtown of a city. Several challenges combine to make this a difficult problem. First, the spectral density at any given spatial location may have both smooth and non-smooth features. Second, the spatial correlation in these density functions is neither stationary nor locally isotropic. Third, the spatial correlation decays at different length scales at different locations in the support of the underlying density. Finally, at some spatial locations, there is very little data. We present a method called multiscale spatial density smoothing that successfully addresses these challenges. ...

  3. Smoothing effect for spatially distributed renewable resources and its impact on power grid robustness

    E-Print Network [OSTI]

    Nagata, Motoki; Fujiwara, Naoya; Tanaka, Gouhei; Suzuki, Hideyuki; Aihara, Kazuyuki

    2015-01-01

    In this paper, we show that spatial correlation of renewable energy outputs greatly influences the robustness of power grids. First, we propose a new index for the spatial correlation among renewable energy outputs. We find that the spatial correlation of renewable energy outputs in a short time-scale is as weak as that caused by independent random variables and that in a long time-scale is as strong as that under perfect synchronization. Then, by employing the topology of the power grid in eastern Japan, we analyze the robustness of the power grid with spatial correlation of renewable energy outputs. The analysis is performed by using a realistic differential-algebraic equations model and the result shows that the spatial correlation of the energy resources strongly degrades the robustness of the power grid. Our result suggests that the spatial correlation of the renewable energy outputs should be taken into account when estimating the stability of power grids.

  4. Response of flame thickness and propagation speed under intense turbulence in spatially developing lean premixed methane–air jet flames

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

    Sankaran, Ramanan; Hawkes, Evatt R.; Yoo, Chun Sang; Chen, Jacqueline H.

    2015-06-22

    Direct numerical simulations of three-dimensional spatially-developing turbulent Bunsen flames were performed at three different turbulence intensities. We performed these simulations using a reduced methane–air chemical mechanism which was specifically tailored for the lean premixed conditions simulated here. A planar-jet turbulent Bunsen flame configuration was used in which turbulent preheated methane–air mixture at 0.7 equivalence ratio issued through a central jet and was surrounded by a hot laminar coflow of burned products. The turbulence characteristics at the jet inflow were selected such that combustion occured in the thin reaction zones (TRZ) regime. At the lowest turbulence intensity, the conditions fall onmore »the boundary between the TRZ regime and the corrugated flamelet regime, and progressively moved further into the TRZ regime by increasing the turbulent intensity. The data from the three simulations was analyzed to understand the effect of turbulent stirring on the flame structure and thickness. Furthermore, statistical analysis of the data showed that the thermal preheat layer of the flame was thickened due to the action of turbulence, but the reaction zone was not significantly affected. A global and local analysis of the burning velocity of the flame was performed to compare the different flames. Detailed statistical averages of the flame speed were also obtained to study the spatial dependence of displacement speed and its correlation to strain rate and curvature.« less

  5. Response of flame thickness and propagation speed under intense turbulence in spatially developing lean premixed methane air jet flames

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

    Sankaran, Ramanan; Hawkes, Evatt R.; Yoo, Chun Sang; Chen, Jacqueline H.

    2015-06-22

    Direct numerical simulations of three-dimensional spatially-developing turbulent Bunsen flames were performed at three different turbulence intensities. We performed these simulations using a reduced methane–air chemical mechanism which was specifically tailored for the lean premixed conditions simulated here. A planar-jet turbulent Bunsen flame configuration was used in which turbulent preheated methane–air mixture at 0.7 equivalence ratio issued through a central jet and was surrounded by a hot laminar coflow of burned products. The turbulence characteristics at the jet inflow were selected such that combustion occured in the thin reaction zones (TRZ) regime. At the lowest turbulence intensity, the conditions fall onmore »the boundary between the TRZ regime and the corrugated flamelet regime, and progressively moved further into the TRZ regime by increasing the turbulent intensity. The data from the three simulations was analyzed to understand the effect of turbulent stirring on the flame structure and thickness. Furthermore, statistical analysis of the data showed that the thermal preheat layer of the flame was thickened due to the action of turbulence, but the reaction zone was not significantly affected. A global and local analysis of the burning velocity of the flame was performed to compare the different flames. Detailed statistical averages of the flame speed were also obtained to study the spatial dependence of displacement speed and its correlation to strain rate and curvature.« less

  6. System for generating pluralities of optical pulses with predetermined frequencies in a temporally and spatially overlapped relationship

    DOE Patents [OSTI]

    Meyerhofer, D.D.; Schmid, A.W.; Chuang, Y.

    1992-03-10

    Ultrashort (pico second and shorter) laser pulses having components of different frequency which are overlapped coherently in space and with a predetermined constant relationship in time, are generated and may be used in applications where plural spectrally separate, time-synchronized pulses are needed as in wave-length resolved spectroscopy and spectral pump probe measurements for characterization of materials. A Chirped Pulse Amplifier (CPA), such as a regenerative amplifier, which provides amplified, high intensity pulses at the output thereof which have the same spatial intensity profile, is used to process a series of chirped pulses, each with a different central frequency (the desired frequencies contained in the output pulses). Each series of chirped pulses is obtained from a single chirped pulse by spectral windowing with a mask in a dispersive expansion stage ahead of the laser amplifier. The laser amplifier amplifies the pulses and provides output pulses with like spatial and temporal profiles. A compression stage then compresses the amplified pulses. All the individual pulses of different frequency, which originated in each single chirped pulse, are compressed and thereby coherently overlapped in space and time. The compressed pulses may be used for the foregoing purposes and other purposes wherien pulses having a plurality of discrete frequency components are required. 4 figs.

  7. Providing Automated Semantic Support for Software Agents in Spatial Decision Support Systems 

    E-Print Network [OSTI]

    Li, Sen

    2008-12-05

    Spatial Decision Support System(SDSS) is a software system that aimed at assisting decision-makers generate and evaluate alternative solutions to semi and unstructured spatial problems through the integration of spatial data and geo... method to build the software system. The evaluated outcome highlighted the system with a sound autonomy and flexibility to (i)implement accurate service discovering (ii)generate alternative solutions for the use case and (iii)export the result in an easy...

  8. Canonical quantization of electromagnetic field in the presence of nonlinear anisotropic magnetodielectric medium with spatial-temporal dispersion

    E-Print Network [OSTI]

    Majid Amooshahi

    2015-10-17

    Modeling a nonlinear anisotropic magnetodielectric medium with spatial-temporal dispersion by two continuum collections of three dimensional harmonic oscillators, a fully canonical quantization of the electromagnetic field is demonstrated in the presence of such a medium. Some coupling tensors of various ranks are introduced that couple the magnetodielectric medium with the electromagnetic field. The polarization and magnetization fields of the medium are defined in terms of the coupling tensors and the oscillators modeling the medium. The electric and magnetic susceptibility tensors of the medium are obtained in terms of the coupling tensors. It is shown that the electric field satisfy an integral equation in frequency domain. The integral equation is solved by an iteration method and the electric field is found up to an arbitrary accuracy.

  9. An Evaluation of Acoustic Doppler Velocimeters as Sensors to Obtain the Concentration of Suspended Mass in Water

    E-Print Network [OSTI]

    Boss, Emmanuel S.

    An Evaluation of Acoustic Doppler Velocimeters as Sensors to Obtain the Concentration of Suspended, acoustic Doppler velocimeters (ADVs) and other acoustic sensors have been used by researchers in the ocean than optical turbidity sensors, and the high-frequency velocity measurements allow for a direct

  10. with Earth's Theia component; thus, it is present-ly not possible to obtain information on D17

    E-Print Network [OSTI]

    Napp, Nils

    with Earth's Theia component; thus, it is present- ly not possible to obtain information on D17 O of the proto-Earth. An alternative explanation for the isotope difference between Earth and the Moon is that the D17 O value of Earth was modified by late- accreting material (late veneer) after the for- mation

  11. Power electronics Slobodan Cuk came to Caltech in 1974 and obtained his PhD degree in Power Electronics in

    E-Print Network [OSTI]

    Levi, Anthony F. J.

    Power electronics Slobodan Cuk came to Caltech in 1974 and obtained his PhD degree in Power Electronics in 1976. From 1977 until December, 1999 he was at the California Institute of Technology where he conducted research and taught courses in Power Electronics and Fundamentals of Energy Processing. During his

  12. Planar waveguide obtained by burying a Ge22As20Se58 fiber in As2S3 glass

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Planar waveguide obtained by burying a Ge22As20Se58 fiber in As2S3 glass Quentin Coulombier glasses. Two highly mature chalcogenide glasses are used for these experiments. GASIR glass from Umicore IR Glass, Olen, Belgium, with the composition of Ge22As20Se58 is used to draw fibers

  13. Iron-based soft magnetic composites with MnZn ferrite nanoparticles coating obtained by solgel method

    E-Print Network [OSTI]

    Volinsky, Alex A.

    Iron-based soft magnetic composites with Mn­Zn ferrite nanoparticles coating obtained by sol nanoparticles to coat iron powder. The nanocrystalline iron powders, with an average particle diameter of 20 nm­Zn ferrites. Mn­Zn ferrite uniformly coated the surface of the powder particles, resulting in a reduced

  14. Assessing Uncertainty in Spatial Exposure Models for Air Pollution Health Effects Assessment

    E-Print Network [OSTI]

    2007-01-01

    Spatial analysis of air pollution and mor- tality in Losin studies linking chronic air pollution exposure to health2006. Bayesian modeling of air pollution health effects with

  15. Reenvisioning cross-sectional at-a-station hydraulic geometry as spatially explicit hydraulic topography

    E-Print Network [OSTI]

    Gonzalez, R.L.; Pasternack, G.B.

    2015-01-01

    creating prescribed topography for form-process inquiry andVirtual manipulation of topography to test potential pool-spatially explicit hydraulic topography R.L. Gonzalez* and

  16. Over 150 years of long-term fertilization alters spatial scaling...

    Office of Scientific and Technical Information (OSTI)

    Prev Next Title: Over 150 years of long-term fertilization alters spatial scaling of microbial biodiversity You are accessing a document from the Department of Energy's...

  17. LARGE REAL ESTATE DEVELOPMENTS, SPATIAL UNCERTAINTY, AND INTEGRATED LAND USE AND TRANSPORTATION MODELING

    E-Print Network [OSTI]

    Clay, Michael J; Johnston, Robert A.

    2008-01-01

    LARGE REAL ESTATE DEVELOPMENTS, SPATIAL UNCERTAINTY, ANDfor than others)? Large real estate construction projectsneed to model large real estate developments, several types

  18. Assessing Uncertainty in Spatial Exposure Models for Air Pollution Health Effects Assessment

    E-Print Network [OSTI]

    2007-01-01

    assessing air pollution exposure within cities as a priorityof air pollution exposure within cities or the associ- atedpollution levels are spatially autocorrelated within cities, and

  19. The role of spatial attention in the selection of real and illusory objects

    E-Print Network [OSTI]

    Martinez, Antigona; Ramanathan, Dhakshin S.; Foxe, John J.; Javitt, Daniel C.; Hillyard, Steven A.

    2007-01-01

    pairs (see Table 4 for Talairach coordinates). Both sets ofcortical Table 4. Talairach coordinates and residualon the left). Table 5. Talairach coordinates of spatial and

  20. Book Review: Lloyd, Christopher D. 2014. Exploring Spatial Scale in Geography. Chichester, England, Wiley.

    E-Print Network [OSTI]

    O'Sullivan, David

    2015-01-01

    O’Sullivan,  Department  of  Geography,  University  of  Spatial  Scale  in  Geography.  John  Wiley  &  Sons,  general  concept  in  geography  or   other  disciplines,  

  1. EGR Spatial Uniformity & Cylinder-Resolved Transients-Measurements using an Absorption Spectroscopy Probe

    Office of Energy Efficiency and Renewable Energy (EERE)

    This poster describes development and application of an EGR probe for assessing steady-state spatial uniformity and cylinder-resolved EGR dynamics.

  2. Collective Excitations in Nanostructures: Towards Spatially-Resolved EELS

    E-Print Network [OSTI]

    Botti, Silvana

    microscopic structure + design new materials. macro micro Introduction Electron Energy-Loss Spectroscopy #12 structure + design new materials. macro micro How can we obtain information about nanostructures? Introduction Electron Energy-Loss Spectroscopy #12;Material Physics Dream of the Materials Physicist

  3. UCL CENTRE FOR ADVANCED SPATIAL ANALYSIS Centre for Advanced Spatial Analysis University College London 1 -19 Torrington Place Gower St London WC1E 7HB

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    is examined, and noteworthy applications are discussed. Geographical Information Systems (GIS / spatially explicit modelling, verification, calibration, validation, Geographical Information Systems (GIS a particular system for a modelling endeavour. Information pertaining to a selection of simulation / modelling

  4. GABAergic neurones control the activity of spatial coding and synchronous network activity in the hippocampal-entorhinal formation thereby affecting spatial learning

    E-Print Network [OSTI]

    Fukai, Tomoki

    GABAergic neurones control the activity of spatial coding and synchronous network activity Abstract GABAergic interneurons are crucially involved in the generation and maintenance of rhythmic synchronous activity in many forebrain regions, including the hippocampal-entorhinal formation. Genetic

  5. Utilizing of protein splicing phenomenon for optimization of obtaining and purification of the recombinant human growth hormone

    E-Print Network [OSTI]

    P. L. Starokadomskyy; O. V. Okunev; L. V. Dubey

    2006-12-05

    Protein splicing is a post-translational autocatalystic excision of internal protein sequence (intein) with the subsequent ligation of the flanking polypeptides (exteins). The high specificity of excision ensured by intein makes it possible to use a phenomenon of protein splicing for the biotechnology purposes. The aim of this work was optimization of obtaining and purification of the recombinant human growth hormone using the protein splicing. It was experimentally demonstrated that the use of modified intein as auto-removal affine marker makes it possible to perform the rapid and cheap isolation of the recombinant protein Hgh. Furthermore, this approach allows to obtain the human growth hormone with native N-terminus, without formyl-metionine. Key words: intein, human growth hormone, protein splicing

  6. Preliminary Results of Nb Thin Film Coating for HIE-ISOLDE SRF Cavities Obtained by Magnetron Sputtering

    E-Print Network [OSTI]

    Sublet, A; Calatroni, S; D'Elia, A; Jecklin, N; Mondino, I; Prunet, S; Therasse, M; Venturini Delsolaro, W; Zhang, P

    2013-01-01

    In the context of the HIE-ISOLDE upgrade at CERN, several new facilities for the niobium sputter coating of QWR-type superconducting RF accelerating cavities have been developed, built, and successfully operated. In order to further optimize the production process of these cavities the magnetron sputtering technique has been further investigated and continued as an alternative to the already successfully operational DC bias diode sputtering method. The purpose of this poster is to present the results obtained with this technique. The Nb thickness profile along the cavity and its correlation with the electro-magnetic field distribution inside the cavity are discussed. Film structure, morphology and Residual Resistivity Ratio (RRR) will be considered as well and compared with films obtained by DC bias diode sputtering. Finally these results will be compared with RF measurement of a production-like magnetron-coated cavity.

  7. Development of the laser isotope separation method (AVLIS) for obtaining weight amounts of highly enriched {sup 150}Nd isotope

    SciTech Connect (OSTI)

    Babichev, A P; Grigoriev, Igor' S; Grigoriev, A I; Dorovskii, A P; D'yachkov, Aleksei B; Kovalevich, S K; Kochetov, V A; Kuznetsov, V A; Labozin, Valerii P; Matrakhov, A V; Mironov, Sergei M; Nikulin, Sergei A; Pesnya, A V; Timofeev, N I; Firsov, Valerii A; Tsvetkov, G O; Shatalova, G G

    2005-10-31

    Results obtained at the first stage of development of the experimental technique for obtaining weight amounts of the highly enriched {sup 150}Nd isotope by laser photoionisation are presented. The vaporiser and the laser are designed, and various methods of irradiation of neodymium vapour and extraction of photoions are tested. The product yield {approx}40 mg h{sup -1} for the {approx}60% enrichment and 25 mg h{sup -1} for the {approx}65% enrichment is achieved for a vaporiser of length 27 cm. The cost of constructing the facility for preparing 50 kg of the {sup 150}Nd isotope, intended for determining the neutrino mass, is estimated. This estimate shows that the cost of production can be lowered by a factor of 5-7 compared to the electromagnetic method. (invited paper)

  8. Validation and Comparison of Carbon Sequestration Project Cost Models with Project Cost Data Obtained from the Southwest Partnership

    SciTech Connect (OSTI)

    Robert Lee; Reid Grigg; Brian McPherson

    2011-04-15

    Obtaining formal quotes and engineering conceptual designs for carbon dioxide (CO{sub 2}) sequestration sites and facilities is costly and time-consuming. Frequently, when looking at potential locations, managers, engineers and scientists are confronted with multiple options, but do not have the expertise or the information required to quickly obtain a general estimate of what the costs will be without employing an engineering firm. Several models for carbon compression, transport and/or injection have been published that are designed to aid in determining the cost of sequestration projects. A number of these models are used in this study, including models by J. Ogden, MIT's Carbon Capture and Sequestration Technologies Program Model, the Environmental Protection Agency and others. This report uses the information and data available from several projects either completed, in progress, or conceptualized by the Southwest Regional Carbon Sequestration Partnership on Carbon Sequestration (SWP) to determine the best approach to estimate a project's cost. The data presented highlights calculated versus actual costs. This data is compared to the results obtained by applying several models for each of the individual projects with actual cost. It also offers methods to systematically apply the models to future projects of a similar scale. Last, the cost risks associated with a project of this scope are discussed, along with ways that have been and could be used to mitigate these risks.

  9. SU-E-I-53: Variation in Measurements of Breast Skin Thickness Obtained Using Different Imaging Modalities

    SciTech Connect (OSTI)

    Nguyen, U; Kumaraswamy, N; Markey, M

    2014-06-01

    Purpose: To investigate variation in measurements of breast skin thickness obtained using different imaging modalities, including mammography, computed tomography (CT), ultrasound, and magnetic resonance imaging (MRI). Methods: Breast skin thicknesses as measured by mammography, CT, ultrasound, and MRI were compared. Mammographic measurements of skin thickness were obtained from published studies that utilized standard positioning (upright) and compression. CT measurements of skin thickness were obtained from a published study of a prototype breast CT scanner in which the women were in the prone position and the breast was uncompressed. Dermatological ultrasound exams of the breast skin were conducted at our institution, with the subjects in the upright position and the breast uncompressed. Breast skin thickness was calculated from breast MRI exams at our institution, with the patient in the prone position and the breast uncompressed. Results: T tests for independent samples demonstrated significant differences in the mean breast skin thickness as measured by different imaging modalities. Repeated measures ANOVA revealed significant differences in breast skin thickness across different quadrants of the breast for some modalities. Conclusion: The measurement of breast skin thickness is significantly different across different imaging modalities. Differences in the amount of compression and differences in patient positioning are possible reasons why measurements of breast skin thickness vary by modality.

  10. SPATIAL RETENTION OF IONS PRODUCING THE IBEX RIBBON

    SciTech Connect (OSTI)

    Schwadron, N. A.; McComas, D. J.

    2013-02-10

    The ribbon observed by the Interstellar Boundary Explorer (IBEX) mission is a narrow, {approx}20 Degree-Sign wide feature that stretches across much of the sky in the global flux of energetic neutral atoms from the outer heliosphere. The ribbon remains an enigma despite its persistence after 3 years of IBEX observations and after almost a dozen theories that attempt to explain it. While each theory that has been posed has its strengths, each one also contradicts IBEX observations or demonstrates significant flaws in internal consistency. Here, we present a new theory that is different than any of the existing ideas and yet accounts for many of the key observations. We argue that the ribbon could be produced by a spatial region in the local interstellar medium where newly ionized atoms are temporarily contained through increased rates of scattering by locally generated waves in the electromagnetic fields. The particles in the ribbon are created predominantly from neutralized solar wind and neutralized pickup ions from inside the solar wind termination shock.

  11. Plasmons in spatially separated double-layer graphene nanoribbons

    SciTech Connect (OSTI)

    Bagheri, Mehran, E-mail: mh-bagheri@sbu.ac.ir [Laser and Plasma Research Institute, Shahid Beheshti University, G. C., Evin, Tehran 19835-63113 (Iran, Islamic Republic of); Bahrami, Mousa [ICFO-Institut de Ciencies Fotoniques, Parc Mediterrani de la Tecnologia, 08860 Castelldefels (Barcelona) (Spain)

    2014-05-07

    Motivated by innovative progresses in designing multi-layer graphene nanostructured materials in the laboratory, we theoretically investigate the Dirac plasmon modes of a spatially separated double-layer graphene nanoribbon system, made up of a vertically offset armchair and metallic graphene nanoribbon pair. We find striking features of the collective excitations in this novel Coulomb correlated system, where both nanoribbons are supposed to be either intrinsic (undoped/ungated) or extrinsic (doped/gated). In the former, it is shown the low-energy acoustical and the high-energy optical plasmon modes are tunable only by the inter-ribbon charge separation. In the later, the aforementioned plasmon branches are modified by the added doping factor. As a result, our model could be useful to examine the existence of a linear Landau-undamped low-energy acoustical plasmon mode tuned via the inter-ribbon charge separation as well as doping. This study might also be utilized for devising novel quantum optical waveguides based on the Coulomb coupled graphene nanoribbons.

  12. Spatiotemporal electromagnetic soliton and spatial ring formation in nonlinear metamaterials

    SciTech Connect (OSTI)

    Zhang Jinggui; Wen Shuangchun; Xiang Yuanjiang; Wang Youwen; Luo Hailu [Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education, School of Computer and Communication, Hunan University, Changsha 410082 (China)

    2010-02-15

    We present a systematic investigation of ultrashort electromagnetic pulse propagation in metamaterials (MMs) with simultaneous cubic electric and magnetic nonlinearity. We predict that spatiotemporal electromagnetic solitons may exist in the positive-index region of a MM with focusing nonlinearity and anomalous group velocity dispersion (GVD), as well as in the negative-index region of the MM with defocusing nonlinearity and normal GVD. The experimental circumstances for generating and manipulating spatiotemporal electromagnetic solitons can be created by elaborating appropriate MMs. In addition, we find that, in the negative-index region of a MM, a spatial ring may be formed as the electromagnetic pulse propagates for focusing nonlinearity and anomalous GVD; while the phenomenon of temporal splitting of the electromagnetic pulse may appear for the same case except for the defocusing nonlinearity. Finally, we demonstrate that the nonlinear magnetization makes the sign of effective electric nonlinear effect switchable due to the combined action of electric and magnetic nonlinearity, exerting a significant influence on the propagation of electromagnetic pulses.

  13. Spatial nonlocality of the small-scale solar dynamo

    SciTech Connect (OSTI)

    Lamb, D. A.; Howard, T. A.; DeForest, C. E.

    2014-06-10

    We explore the nature of the small-scale solar dynamo by tracking magnetic features. We investigate two previously explored categories of the small-scale solar dynamo: shallow and deep. Recent modeling work on the shallow dynamo has produced a number of scenarios for how a strong network concentration can influence the formation and polarity of nearby small-scale magnetic features. These scenarios have measurable signatures, for which we test using magnetograms from the Narrowband Filter Imager (NFI) on board Hinode. We find no statistical tendency for newly formed magnetic features to cluster around or away from network concentrations, nor do we find any statistical relationship between their polarities. We conclude that there is no shallow or 'surface' dynamo on the spatial scales observable by Hinode/NFI. In light of these results, we offer a scenario in which the subsurface field in a deep solar dynamo is stretched and distorted via turbulence, allowing the small-scale field to emerge at random locations on the photosphere.

  14. S4: A spatial-spectral model for speckle suppression

    SciTech Connect (OSTI)

    Fergus, Rob; Hogg, David W.; Oppenheimer, Rebecca; Brenner, Douglas; Pueyo, Laurent

    2014-10-20

    High dynamic range imagers aim to block or eliminate light from a very bright primary star in order to make it possible to detect and measure far fainter companions; in real systems, a small fraction of the primary light is scattered, diffracted, and unocculted. We introduce S4, a flexible data-driven model for the unocculted (and highly speckled) light in the P1640 spectroscopic coronagraph. The model uses principal components analysis (PCA) to capture the spatial structure and wavelength dependence of the speckles, but not the signal produced by any companion. Consequently, the residual typically includes the companion signal. The companion can thus be found by filtering this error signal with a fixed companion model. The approach is sensitive to companions that are of the order of a percent of the brightness of the speckles, or up to 10{sup –7} times the brightness of the primary star. This outperforms existing methods by a factor of two to three and is close to the shot-noise physical limit.

  15. Spatial Dispersion of Peering Clusters in the European Internet

    E-Print Network [OSTI]

    D'Ignazio, Alessio; Giovannetti, Emanuele

    2006-03-14

    to three forces: a pooled labour market, greater provision of non-traded inputs, and knowledge spillovers. Glaeser, Kallal, Scheinkman and Schleifer (1992) stressed the importance of geographic proximity in defining the extent of knowledge spillovers within... the decision to peer at the IXP is independent from the location choice of the ISPs with respect to end users. Some centripetal forces considered in the literature, such as knowledge spillovers obtained through interactions with peers, may be moderately active...

  16. G E O M A T I C A SPATIAL DATA UNCERTAINTY

    E-Print Network [OSTI]

    G E O M A T I C A SPATIAL DATA UNCERTAINTY IN THE VGI WORLD: GOING FROM CONSUMER TO PRODUCER Joel discuss the concept of "perceived qualities" as, in a Volunteered Geographic Information (VGI) context, a classification framework is proposed of various types of spatial data usage. Then, we address uncertainty and VGI

  17. Comparison of four machine learning algorithms for spatial data Nicolas Gilardi Samy Bengio

    E-Print Network [OSTI]

    Gilardi, Nicolas

    1 Comparison of four machine learning algorithms for spatial data analysis Nicolas Gilardi Samy methodology on how to use machine learning algorithms for spatial data analysis in order to avoid any bias algorithms are presented, namely multilayer perceptrons (MLP), mixture of experts (ME), support vector

  18. Endogenous Spatial Attention: Evidence for Intact Functioning in Adults With Autism

    E-Print Network [OSTI]

    Behrmann, Marlene

    Endogenous Spatial Attention: Evidence for Intact Functioning in Adults With Autism Michael A aspect of human cognition, and previous research on spatial attention in individuals with autism spectrum stimulus). We found that high-functioning adults with autism exhibited slower reaction times overall

  19. Improving fisheries co-management through ecosystem-based spatial management: The Galapagos Marine Reserve

    E-Print Network [OSTI]

    Charles, Anthony

    t Ecosystem-based spatial management (EBSM) can provide a mechanism for a strategic and integrated planImproving fisheries co-management through ecosystem-based spatial management: The Galapagos Marine Febrero, Santa Cruz, Galapagos, Ecuador c Management Science/Environmental Science, Saint Mary

  20. Evaluation of Spatial Displays for Navigation without Sight JAMES R. MARSTON and JACK M. LOOMIS

    E-Print Network [OSTI]

    Loomis, Jack M.

    realities, Evaluation/methodology; Ergonomics, Auditory I/O, User-Centered Design, Voice I/O, Haptic IEvaluation of Spatial Displays for Navigation without Sight JAMES R. MARSTON and JACK M. LOOMIS, Pages 110­124. #12;Evaluation of Spatial Displays for Navigation without Sight · 111 systems, visual map

  1. Spatial analysis of air pollution and cancer incidence rates in Haifa Bay, Israel Ori Eitan a

    E-Print Network [OSTI]

    Spatial analysis of air pollution and cancer incidence rates in Haifa Bay, Israel Ori Eitan with historically high air pollution levels. This work tests whether persistent spatial patterns of metrics of chronic exposure to air pollutants are associated with the observed patterns of cancer incidence rates

  2. Motivation sharpens exogenous spatial attention Jan B. Engelmann(1) and Luiz Pessoa(2)

    E-Print Network [OSTI]

    Pessoa, Luiz

    1 Motivation sharpens exogenous spatial attention Jan B. Engelmann(1) and Luiz Pessoa(2) (1) Jan B (lpessoa@indiana.edu). #12;2 ABSTRACT Although both attention and motivation affect behavior, how these two participants performed a spatially-cued forced-choice localization task under varying levels of motivation

  3. SAFIR: LOW-COST SPATIAL SOUND FOR INSTRUMENTED ENVIRONMENTS Michael Schmitz1

    E-Print Network [OSTI]

    SAFIR: LOW-COST SPATIAL SOUND FOR INSTRUMENTED ENVIRONMENTS Michael Schmitz1 and Andreas Butz2 1, instrumented environments. INTRODUCTION Real-time 3D sound rendering has proven to be valuable across a wide. In this work, we present SAFIR (Spatial Audio Framework for Instrumented Rooms), an API that allows

  4. Spatial release from energetic and informational masking in a divided speech identification taska)

    E-Print Network [OSTI]

    Shinn-Cunningham, Barbara G.

    , performance generally improves with spatial separation of the sources. The current study explores the role that of the fixed-level message. Results demonstrate that spatial separation of the competing messages improved of the less-intense talker. Moreover, performance generally improved as the broadband energy ratio

  5. Multiple regression on distance matrices: a multivariate spatial analysis tool Jeremy W. Lichstein

    E-Print Network [OSTI]

    Lichstein, Jeremy W.

    Multiple regression on distance matrices: a multivariate spatial analysis tool Jeremy W. Lichstein, Spatial autocorrelation Abstract I explore the use of multiple regression on distance matrices (MRM regression of a response matrix on any number of explanatory matrices, where each matrix contains distances

  6. Spatial model coupling -an efficient scheme to combine hydraulic and geomechanic simulations

    E-Print Network [OSTI]

    Cirpka, Olaf Arie

    Spatial model coupling - an efficient scheme to combine hydraulic and geomechanic simulations present a spatial coupling approach with two subdomains [1]: Hydro-geomechanical model full model approach-field (geomechanics are neglected) hydro-geomechanical subdomain el2p model hydraulic subdomain 2p model hydraulic

  7. HIGH SPATIAL RESOLUTION SOLAR ATLAS IN PROVENCE-ALPES-CTE D'AZUR

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , realized the Solar Atlas project thanks to the support and funding of local and regional organizationsHIGH SPATIAL RESOLUTION SOLAR ATLAS IN PROVENCE-ALPES-CÔTE D'AZUR Philippe Blanc 1 , Bella Espinar) 1. Introduction Most existing solar atlases cover a continent or a country with a spatial resolution

  8. Role of high-order aberrations in senescent changes in spatial vision

    SciTech Connect (OSTI)

    Elliot, S; Choi, S S; Doble, N; Hardy, J L; Evans, J W; Werner, J S

    2009-01-06

    The contributions of optical and neural factors to age-related losses in spatial vision are not fully understood. We used closed-loop adaptive optics to test the visual benefit of correcting monochromatic high-order aberrations (HOAs) on spatial vision for observers ranging in age from 18-81 years. Contrast sensitivity was measured monocularly using a two-alternative forced choice (2AFC) procedure for sinusoidal gratings over 6 mm and 3 mm pupil diameters. Visual acuity was measured using a spatial 4AFC procedure. Over a 6 mm pupil, young observers showed a large benefit of AO at high spatial frequencies, whereas older observers exhibited the greatest benefit at middle spatial frequencies, plus a significantly larger increase in visual acuity. When age-related miosis is controlled, young and old observers exhibited a similar benefit of AO for spatial vision. An increase in HOAs cannot account for the complete senescent decline in spatial vision. These results may indicate a larger role of additional optical factors when the impact of HOAs is removed, but also lend support for the importance of neural factors in age-related changes in spatial vision.

  9. Development of spatial pattern in large woody debris and debris dams in streams

    E-Print Network [OSTI]

    Kraft, Clifford E.

    The spatial distribution of large woody debris (LWD) in streams was evaluated using Neighbor K statistics years after wood deposition, we surveyed individual pieces of LWD in one stream and surveyed debris dam) distributions of wood were identified. Individual pieces of LWD were aggregated at spatial extents ranging from

  10. ON MIMO CHANNEL CAPACITY, SPATIAL SAMPLING AND THE LAWS OF ELECTROMAGNETISM

    E-Print Network [OSTI]

    Loyka, Sergey

    ON MIMO CHANNEL CAPACITY, SPATIAL SAMPLING AND THE LAWS OF ELECTROMAGNETISM Sergey Loyka School by the laws of electromagnetism on achievable MIMO channel capacity in its general form. Our approach is a two expansion of a generic electromagnetic wave combined with Nyquist sampling theorem in the spatial domain, we

  11. JOURNAL OF THE INTERNATIONAL ASSOCIATION FOR SHELL AND SPATIAL STRUCTURES: IASS EXPANDABLE "BLOB" STRUCTURES

    E-Print Network [OSTI]

    Pellegrino, Sergio

    #12;#12;JOURNAL OF THE INTERNATIONAL ASSOCIATION FOR SHELL AND SPATIAL STRUCTURES: IASS 151 EXPANDABLE "BLOB" STRUCTURES F. JENSEN AND S. PELLEGRINO Department of Engineering, University of Cambridge and Spatial Structures ­ From Models to Realization, held in September 2004 in Montpellier, France. SUMMARY

  12. Using CO2 spatial variability to quantify representation errors of satellite CO2 retrievals

    E-Print Network [OSTI]

    Michalak, Anna M.

    global data of column- averaged CO2 dry-air mole fraction (XCO2) at high spatial resolutions. These dataUsing CO2 spatial variability to quantify representation errors of satellite CO2 retrievals A. A 2008; published 29 August 2008. [1] Satellite measurements of column-averaged CO2 dry- air mole

  13. THE SOCIO-SPATIAL SYNERGY IN LAND GOVERNANCE: A CASE OF INFORMAL

    E-Print Network [OSTI]

    governance that can be harnessed to aid monitoring of the post-2015 global developmental agenda. 15 #12;MANYTHE SOCIO-SPATIAL SYNERGY IN LAND GOVERNANCE: A CASE OF INFORMAL SETTLEMENTS IN BAHIR DAR, ETHIOPIA relationships between social and spatial processes are key drivers of the economic, cultural and environmental

  14. Dynamic Graphics in a GIS: Exploring and An-alyzing Multivariate Spatial Data Using Linked

    E-Print Network [OSTI]

    Symanzik, Jürgen

    Dynamic Graphics in a GIS: Exploring and An- alyzing Multivariate Spatial Data Using Linked State University, Ames IA 50011-1210 2GIS Support and Research Facility, Iowa State University Summary and displaying spatial data and concomitant geographic variables. Critical to any good GIS are database storage

  15. Agent-based modeling of human decision-making behavior within Spatial Decision Support Systems

    E-Print Network [OSTI]

    Sengupta, Raja

    on modeling humans as spatial "agents" that impact the landscape in some fashion. For example, considerable characteristics of the individual, such as age and income, and spatial characteristics of their land holdings for a period of ten years. Modeling Farmers as Agents Traditionally, neoclassical economic theories and profit-maximizing

  16. Spatial pattern and temporal dynamics of northern bobwhite abundance and agricultural landuse, and potential casual factors 

    E-Print Network [OSTI]

    Okay, Atiye Zeynep

    2006-04-12

    recognizable periods in the spatial and temporal dynamics of NBW abundance between 1920 and 1990. Severe weather conditions and habitat loss due to land use change appeared to be the most important factors influencing the long-term trends and spatial patterns...

  17. Spatial involute gearing -a new type of skew gears Hellmuth Stachel

    E-Print Network [OSTI]

    Nawratil, Georg

    Spatial involute gearing - a new type of skew gears Hellmuth Stachel Institute of Discrete stachel@dmg.tuwien.ac.at Abstract This is a geometric approach to spatial involute gearing which has recently been developed by Jack Phillips [4]. Due to Phillips' fundamental theorems helical involute gears

  18. Radiation dose reduction in computed tomography perfusion using spatial-temporal Bayesian methods

    E-Print Network [OSTI]

    Chen, Tsuhan

    in mean-square-error (MSE) of 40% at low dose radiation of 43mA. Keywords: spatial-temporal, BayesianRadiation dose reduction in computed tomography perfusion using spatial-temporal Bayesian methods-ray radiation dose is of significant concern to patients and operators, especially CT perfusion (CTP) imaging

  19. SPATIAL VARIABILITY OF SNOW DEPTH MEASUREMENTS AT TWO MOUNTAIN PASS SNOW TELEMETRY STATIONS

    E-Print Network [OSTI]

    Anderson, Charles W.

    THESIS SPATIAL VARIABILITY OF SNOW DEPTH MEASUREMENTS AT TWO MOUNTAIN PASS SNOW SPATIAL VARIABILITY OF SNOW DEPTH MEASUREMENTS AT TWO MOUNTAIN PASS SNOW TELEMETRY STATIONS Much of the Western United States relies heavily on spring snow melt runoff to meet its industrial, agricultural

  20. Journal of Electroanalytical Chemistry 522 (2002) 7585 A study of spatially coupled bipolar electrochemistry on the

    E-Print Network [OSTI]

    Mittal, Aditya

    2002-01-01

    electrochemistry on the sub-micrometer scale: colloidal particles on surfaces and cylinders in nuclear-track etched the feasibility of applying spatially coupled bipolar electrochemistry to the sub-micrometer regime­acetonitrile, spatially coupled bipolar electrochemistry (SCBE) reaches a practical limit for structures between 200

  1. A simple bioclogging model that accounts for spatial spreading of bacteria

    E-Print Network [OSTI]

    Demaret, Laurent

    A simple bioclogging model that accounts for spatial spreading of bacteria HJ Eberla , L Demaretb is presented that accounts for spatial expansion of the bacterial popu- lation in the soil. The bacteria move harmful environ- mental factors and mechanical washout. Naturally occurring bacteria are a major

  2. Finding the Efficient Frontier of a Bi-Criteria, Spatially-explicit, Harvest Scheduling Problem

    E-Print Network [OSTI]

    Brown, Sally

    Finding the Efficient Frontier of a Bi-Criteria, Spatially-explicit, Harvest Scheduling Problem frontier for a bi-criteria, spatially-explicit harvest scheduling problem. The problem is to find all resources than merely timber production. Increasingly, values such as wildlife habitat, recreation, water

  3. 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

  4. Simulated Longwave Clearsky Irradiance over the Ocean: Spatial and Temporal Variability 19791993

    E-Print Network [OSTI]

    Allan, Richard P.

    Simulated Long­wave Clear­sky Irradiance over the Ocean: Spatial and Temporal Variability 1979.: OA8038 First author: Allan 1 Simulated Long­wave Clear­sky Irradiance over the Ocean: Spatial­wave irradiances calculated by a wide­band radiation code applied to the ECMWF re­analysis are used to investigate

  5. Cmara et al.Cmara et al.Cmara et al.Cmara et al. A Unified Framework For Spatial Data MoA Unified Framework For Spatial Data MoA Unified Framework For Spatial Data MoA Unified Framework For Spatial Data Moddddelselselsels Towards A Unified Framework ForTo

    E-Print Network [OSTI]

    de Figueiredo, Luiz Henrique

    , interoperabilty issues and language proposal. Keywords: Geographical Information Systems,Spatial Databases into a GIS (geographical information system) is a process which includes: · An informal description- eral in any information system, these decisions are cru- cially important in the case of spatial data

  6. Analyzing Energy Behavior of Spatial Access Methods for Memory-Resident Data

    E-Print Network [OSTI]

    Huang, Wei

    resources, storage capacity, battery energy, and connectivity, that are a consequence of design implications of spatial data storage and access methods for memory resident datasets. While there has been- formance trade-offs of different storage organizations for spatial data on resource-constrained mobile

  7. SPATIAL MODELS FOR LOCALIZATION OF IMAGE TAMPERING USING DISTRIBUTED SOURCE CODES

    E-Print Network [OSTI]

    Girod, Bernd

    SPATIAL MODELS FOR LOCALIZATION OF IMAGE TAMPERING USING DISTRIBUTED SOURCE CODES Yao-Chung Lin to distinguish the legitimate diversity of encoded images from tampering but also lo- calize the tampered regions extend the localization decoder with 1D and 2D spatial mod- els to exploit the contiguity of the tampered

  8. Mapping the geogenic radon potential: methodology and spatial analysis for central Hungary

    E-Print Network [OSTI]

    Horváth, Ákos

    Mapping the geogenic radon potential: methodology and spatial analysis for central Hungary Katalin 2013 Available online Keywords: Hungarian geogenic radon potential Soil gas radon Soil gas permeability Spatial modeling a b s t r a c t A detailed geogenic radon potential (GRP) mapping based on field soil gas

  9. Parametric spatial solitary waves due to type II second-harmonic generation

    E-Print Network [OSTI]

    Parametric spatial solitary waves due to type II second-harmonic generation Alexander V. Buryak either 1 or 2 is generated). A particular case of this three-wave interaction, formally described analyze (1 1)- and (2 1)-dimensional self-guided beams (spatial solitons) due to three-wave para- metric

  10. Synthetic spatial coherence function for optical tomography and profilometry: simultaneous realization of longitudinal coherence

    E-Print Network [OSTI]

    Rosen, Joseph

    Laboratory for Information Photonics and Wave Signal Processing 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585, Japan, E-mail: takeda@ice.uec.ac.jp ABSTRACT A new scheme for synthesizing three-monochromatic spatially incoherent source with a spatial light modulator, we generated a special optical field

  11. Spatial Resolution for Processing Seismic Data: Type-2 Methods for Finding the Relevant Granular Structure

    E-Print Network [OSTI]

    Kreinovich, Vladik

    Spatial Resolution for Processing Seismic Data: Type-2 Methods for Finding the Relevant Granular. NEED TO FIND GRANULARITY (SPATIAL RESOLUTION) OF THE RESULTS OF SEISMIC DATA PROCESSING In evaluations--One of the main methods of determining the Earth structure is the analysis of the seismic data. Based

  12. SPATIAL PREDICTION OF NONLINEAR RANDOM OCEAN WAVES: IDENTIFICATION OF GAUSSIAN AND NONGAUSSIAN CONTRIBUTIONS

    E-Print Network [OSTI]

    Sweetman, Bert

    , is shown to produce unstable spatial wave statistics, producing more nearly Gaussian behavior after spatial­sided) wave spectrum S(!) at the discrete frequencies ! k , while the mutually independent phases #18; k(t)---has a JONSWAP power spectrum, with significant w

  13. Iodine in groundwater of the North China Plain: Spatial patterns and hydrogeochemical processes of enrichment

    E-Print Network [OSTI]

    Zhan, Hongbin

    Iodine in groundwater of the North China Plain: Spatial patterns and hydrogeochemical processes online xxxx Keywords: Iodine Groundwater Spatial patterns Hydrogeochemistry North China Plain The North/L) and low-iodine (b10 g/L) groundwater regions that frequently result in iodine excess or deficien- cy

  14. Study of spatial scaling in braided river patterns using synthetic aperture radar imagery

    E-Print Network [OSTI]

    Foufoula-Georgiou, Efi

    imagery was used to extract braided river patterns such that their spatial scaling characteristics could to build bridges across sections of braided rivers, to harvest the rich mineral deposits left on their bars, determin- istic approach of water flow over a cohesionless bed. Their model reproduced the main spatial

  15. A SPATIAL OVERCONSTRAINED MECHANISM THAT CAN BE USED IN PRACTICAL APPLICATIONS

    E-Print Network [OSTI]

    Mavroidis, Constantinos

    A SPATIAL OVERCONSTRAINED MECHANISM THAT CAN BE USED IN PRACTICAL APPLICATIONS Constantinos Mavroidis, Assistant Professor Michael Beddows, Research Assistant Department of Mechanical and Aerospace mechanism is presented that can be used in many practical applications. It is a 5 link 4R1P spatial

  16. Spatial and temporal variations of the Kuroshio east of Taiwan, 19822005: A numerical study

    E-Print Network [OSTI]

    Wu, Chau-Ron

    Spatial and temporal variations of the Kuroshio east of Taiwan, 1982­2005: A numerical study Yi the spatial and temporal variations of the Kuroshio east of Taiwan. Between 22 and 25°N, the mean state of Taiwan and the branching of the Kuroshio northeast of Taiwan, are well reproduced by the model. Southeast

  17. Detection of forest stand-level spatial structure in ectomycorrhizal fungal communities

    E-Print Network [OSTI]

    Detection of forest stand-level spatial structure in ectomycorrhizal fungal communities Erik A First published online 10 May 2004 Abstract Ectomycorrhizal fungal (EMF) communities are highly diverse, we investigated the spatial structure of these communities. We used EMF community data from a number

  18. Information Engineering for the Development of Spatial Information Systems: a Research Agenda

    E-Print Network [OSTI]

    Spatial Information Systems (SIS) involves much more than technology. It also involves the coordinationInformation Engineering for the Development of Spatial Information Systems: a Research Agenda Y. Bédard Proceedings of the 27th Annual Conference of the Urban and Regional Information Systems

  19. Spin wave propagation in spatially nonuniform magnetic fields Kevin R. Smith,1,2,a

    E-Print Network [OSTI]

    Spin wave propagation in spatially nonuniform magnetic fields Kevin R. Smith,1,2,a Michael J August 2008 Spin wave pulse propagation in a magnetic thin film under static, spatially nonuniform strip. Spin wave pulses were excited with a microstrip transducer at one end of the film strip. The spin

  20. Induced patterning of organic and inorganic materials by spatially discrete surface energy Walter Hu,a)

    E-Print Network [OSTI]

    Hu, Wenchuang "Walter"

    Induced patterning of organic and inorganic materials by spatially discrete surface energy Walter surface energies on the substrate induce microfluidic self-patterning of materials that are deposited but spatially organized nanostructures both in organic and inorganic materials. Available methods are mainly