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Sample records for groundvehicle simulation update

  1. Reliability analysis and updating of deteriorating systems with subset simulation

    DEFF Research Database (Denmark)

    Schneider, Ronald; Thöns, Sebastian; Straub, Daniel

    2017-01-01

    Bayesian updating of the system deterioration model. The updated system reliability is then obtained through coupling the updated deterioration model with a probabilistic structural model. The underlying high-dimensional structural reliability problems are solved using subset simulation, which...

  2. QCWAVE, a Mathematica quantum computer simulation update

    CERN Document Server

    Tabakin, Frank

    2011-01-01

    This Mathematica 7.0/8.0 package upgrades and extends the quantum computer simulation code called QDENSITY. Use of the density matrix was emphasized in QDENSITY, although that code was also applicable to a quantum state description. In the present version, the quantum state version is stressed and made amenable to future extensions to parallel computer simulations. The add-on QCWAVE extends QDENSITY in several ways. The first way is to describe the action of one, two and three- qubit quantum gates as a set of small ($2 \\times 2, 4\\times 4$ or $8\\times 8$) matrices acting on the $2^{n_q}$ amplitudes for a system of $n_q$ qubits. This procedure was described in our parallel computer simulation QCMPI and is reviewed here. The advantage is that smaller storage demands are made, without loss of speed, and that the procedure can take advantage of message passing interface (MPI) techniques, which will hopefully be generally available in future Mathematica versions. Another extension of QDENSITY provided here is a mu...

  3. Status update of the BWR cask simulator

    Energy Technology Data Exchange (ETDEWEB)

    Lindgren, Eric R. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Durbin, Samuel G. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2015-09-01

    The performance of commercial nuclear spent fuel dry storage casks are typically evaluated through detailed numerical analysis of the system's thermal performance. These modeling efforts are performed by the vendor to demonstrate the performance and regulatory compliance and are independently verified by the Nuclear Regulatory Commission (NRC). Carefully measured data sets generated from testing of full sized casks or smaller cask analogs are widely recognized as vital for validating these models. Numerous studies have been previously conducted. Recent advances in dry storage cask designs have moved the storage location from above ground to below ground and significantly increased the maximum thermal load allowed in a cask in part by increasing the canister helium pressure. Previous cask performance validation testing did not capture these parameters. The purpose of the investigation described in this report is to produce a data set that can be used to test the validity of the assumptions associated with the calculations presently used to determine steady-state cladding temperatures in modern dry casks. These modern cask designs utilize elevated helium pressure in the sealed canister or are intended for subsurface storage. The BWR cask simulator (BCS) has been designed in detail for both the above ground and below ground venting configurations. The pressure vessel representing the canister has been designed, fabricated, and pressure tested for a maximum allowable pressure (MAWP) rating of 24 bar at 400 C. An existing electrically heated but otherwise prototypic BWR Incoloy-clad test assembly is being deployed inside of a representative storage basket and cylindrical pressure vessel that represents the canister. The symmetric single assembly geometry with well-controlled boundary conditions simplifies interpretation of results. Various configurations of outer concentric ducting will be used to mimic conditions for above and below ground storage configurations

  4. Updated Simulation Studies of Damage Limit of LHC Tertiary Collimators

    CERN Document Server

    AUTHOR|(CDS)2085459; Bertarelli, Alessandro; Bruce, Roderik; Carra, Federico; Cerutti, Francesco; Gradassi, Paolo; Lechner, Anton; Redaelli, Stefano; Skordis, Eleftherios

    2015-01-01

    The tertiary collimators (TCTs) in the LHC, installed in front of the experiments, in standard operation intercept fractions of 10−3 halo particles. However, they risk to be hit by high-intensity primary beams in case of asynchronous beam dump. TCT damage thresholds were initially inferred from results of destructive tests on a TCT jaw, supported by numerical simulations, assuming simplified impact scenarios with one single bunch hitting the jaw with a given impact parameter. In this paper, more realistic failure conditions, including a train of bunches and taking into account the full collimation hierarchy, are used to derive updated damage limits. The results are used to update the margins in the collimation hierarchy and could thus potentially have an influence on the LHC performance.

  5. Real-time, interactive, visually updated simulator system for telepresence

    Science.gov (United States)

    Schebor, Frederick S.; Turney, Jerry L.; Marzwell, Neville I.

    1991-01-01

    Time delays and limited sensory feedback of remote telerobotic systems tend to disorient teleoperators and dramatically decrease the operator's performance. To remove the effects of time delays, key components were designed and developed of a prototype forward simulation subsystem, the Global-Local Environment Telerobotic Simulator (GLETS) that buffers the operator from the remote task. GLETS totally immerses an operator in a real-time, interactive, simulated, visually updated artificial environment of the remote telerobotic site. Using GLETS, the operator will, in effect, enter into a telerobotic virtual reality and can easily form a gestalt of the virtual 'local site' that matches the operator's normal interactions with the remote site. In addition to use in space based telerobotics, GLETS, due to its extendable architecture, can also be used in other teleoperational environments such as toxic material handling, construction, and undersea exploration.

  6. Improving precipitation simulation from updated surface characteristics in South America

    Science.gov (United States)

    Pereira, Gabriel; Silva, Maria Elisa Siqueira; Moraes, Elisabete Caria; Chiquetto, Júlio Barboza; da Silva Cardozo, Francielle

    2017-07-01

    Land use and land cover maps and their physical-chemical and biological properties are important variables in the numerical modeling of Earth systems. In this context, the main objective of this study is to analyze the improvements resulting from the land use and land cover map update in numerical simulations performed using the Regional Climate Model system version 4 (RegCM4), as well as the seasonal variations of physical parameters used by the Biosphere Atmosphere Transfer Scheme (BATS). In general, the update of the South America 2007 land use and land cover map, used by the BATS, improved the simulation of precipitation by 10 %, increasing the mean temporal correlation coefficient, compared to observed data, from 0.84 to 0.92 (significant at p < 0.05, Student's t test). Correspondingly, the simulations performed with adjustments in maximum fractional vegetation cover, in visible and shortwave infrared reflectance, and in the leaf area index, showed a good agreement for maximum and minimum temperature, with values closer to observed data. The changes in physical parameters and land use updating in BATS/RegCM4 reduced overestimation of simulated precipitation from 19 to 7 % (significant at p < 0.05, Student's t test). Regarding evapotranspiration and precipitation, the most significant differences due to land use updating were located (1) in the Amazon deforestation arc; (2) around the Brazil-Bolivia border (in the Brazilian Pantanal wetlands); (3) in the Northeast region of Brazil; (4) in northwestern Paraguay; and (5) in the River Plate Basin, in Argentina. Moreover, the main precipitation differences between sensitivity and control experiments occurred during the rainy months in central-north South America (October to March). These were associated with a displacement in the South Atlantic convergence zone (SACZ) positioning, presenting a spatial pattern of alternated areas with higher and lower precipitation rates. These important differences occur due to the

  7. Improving precipitation simulation from updated surface characteristics in South America

    Science.gov (United States)

    Pereira, Gabriel; Silva, Maria Elisa Siqueira; Moraes, Elisabete Caria; Chiquetto, Júlio Barboza; da Silva Cardozo, Francielle

    2016-04-01

    Land use and land cover maps and their physical-chemical and biological properties are important variables in the numerical modeling of Earth systems. In this context, the main objective of this study is to analyze the improvements resulting from the land use and land cover map update in numerical simulations performed using the Regional Climate Model system version 4 (RegCM4), as well as the seasonal variations of physical parameters used by the Biosphere Atmosphere Transfer Scheme (BATS). In general, the update of the South America 2007 land use and land cover map, used by the BATS, improved the simulation of precipitation by 10 %, increasing the mean temporal correlation coefficient, compared to observed data, from 0.84 to 0.92 (significant at p Pantanal wetlands); (3) in the Northeast region of Brazil; (4) in northwestern Paraguay; and (5) in the River Plate Basin, in Argentina. Moreover, the main precipitation differences between sensitivity and control experiments occurred during the rainy months in central-north South America (October to March). These were associated with a displacement in the South Atlantic convergence zone (SACZ) positioning, presenting a spatial pattern of alternated areas with higher and lower precipitation rates. These important differences occur due to the replacement of tropical rainforest for pasture and agriculture and the replacement of agricultural areas for pasture, scrubland, and deciduous forest.

  8. Electromagnetic Simulation Seminar and Opera/Tosca update Seminar

    CERN Multimedia

    IT Department

    2012-01-01

    9 May 2012 Kjell Johnsen Auditorium – Room 30-7-018 Electromagnetic Simulation Seminar & Opera/Tosca update Seminar By Cobham Technical Services – Vector Fields Software Virtual prototyping using electromagnetic simulation software plays an important role in the design stage of many devices and the Opera software has been in use for this purpose at CERN for over a decade. A technical seminar will take place concerning the latest developments in electromagnetic design, analysis and multi-physics applications for large scientific experiments.  Information will be presented on applications such as superconducting magnets and ion-beam sources. The seminar will be presented by engineers/physicists from Cobham Technical Services – Vector Fields Software who develop the Opera program.  It is FREE to attend and is open to both current Opera software users and also those who wish to expand their knowledge and understand better the capabilities on offer. Prog...

  9. Lazy Updating of hubs can enable more realistic models by speeding up stochastic simulations

    Energy Technology Data Exchange (ETDEWEB)

    Ehlert, Kurt; Loewe, Laurence, E-mail: loewe@wisc.edu [Laboratory of Genetics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States); Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, Wisconsin 53715 (United States)

    2014-11-28

    To respect the nature of discrete parts in a system, stochastic simulation algorithms (SSAs) must update for each action (i) all part counts and (ii) each action's probability of occurring next and its timing. This makes it expensive to simulate biological networks with well-connected “hubs” such as ATP that affect many actions. Temperature and volume also affect many actions and may be changed significantly in small steps by the network itself during fever and cell growth, respectively. Such trends matter for evolutionary questions, as cell volume determines doubling times and fever may affect survival, both key traits for biological evolution. Yet simulations often ignore such trends and assume constant environments to avoid many costly probability updates. Such computational convenience precludes analyses of important aspects of evolution. Here we present “Lazy Updating,” an add-on for SSAs designed to reduce the cost of simulating hubs. When a hub changes, Lazy Updating postpones all probability updates for reactions depending on this hub, until a threshold is crossed. Speedup is substantial if most computing time is spent on such updates. We implemented Lazy Updating for the Sorting Direct Method and it is easily integrated into other SSAs such as Gillespie's Direct Method or the Next Reaction Method. Testing on several toy models and a cellular metabolism model showed >10× faster simulations for its use-cases—with a small loss of accuracy. Thus we see Lazy Updating as a valuable tool for some special but important simulation problems that are difficult to address efficiently otherwise.

  10. Real time hybrid simulation with online model updating: An analysis of accuracy

    Science.gov (United States)

    Ou, Ge; Dyke, Shirley J.; Prakash, Arun

    2017-02-01

    In conventional hybrid simulation (HS) and real time hybrid simulation (RTHS) applications, the information exchanged between the experimental substructure and numerical substructure is typically restricted to the interface boundary conditions (force, displacement, acceleration, etc.). With additional demands being placed on RTHS and recent advances in recursive system identification techniques, an opportunity arises to improve the fidelity by extracting information from the experimental substructure. Online model updating algorithms enable the numerical model of components (herein named the target model), that are similar to the physical specimen to be modified accordingly. This manuscript demonstrates the power of integrating a model updating algorithm into RTHS (RTHSMU) and explores the possible challenges of this approach through a practical simulation. Two Bouc-Wen models with varying levels of complexity are used as target models to validate the concept and evaluate the performance of this approach. The constrained unscented Kalman filter (CUKF) is selected for using in the model updating algorithm. The accuracy of RTHSMU is evaluated through an estimation output error indicator, a model updating output error indicator, and a system identification error indicator. The results illustrate that, under applicable constraints, by integrating model updating into RTHS, the global response accuracy can be improved when the target model is unknown. A discussion on model updating parameter sensitivity to updating accuracy is also presented to provide guidance for potential users.

  11. Geant4 electromagnetic physics updates for space radiation effects simulation

    Science.gov (United States)

    Ivantchenko, Anton; Nieminen, Petteri; Incerti, Sebastien; Santin, Giovanni; Ivantchenko, Vladimir; Grichine, Vladimir; Allison, John; Karamitos, Mathiew

    The Geant4 toolkit is used in many applications including space science studies. The new Geant4 version 10.0 released in December 2013 includes a major revision of the toolkit and offers multi-threaded mode for event level parallelism. At the same time, Geant4 electromagnetic and hadronic physics sub-libraries have been significantly updated. In order to validate the new and updated models Geant4 verification tests and benchmarks were extended. Part of these developments was sponsored by the European Space Agency in the context of research aimed at modelling radiation biological end effects. In this work, we present an overview of results of several benchmarks for electromagnetic physics models relevant to space science. For electromagnetic physics, recently Compton scattering, photoelectric effect, and Rayleigh scattering models have been improved and extended down to lower energies. Models of ionization and fluctuations have also been improved; special micro-dosimetry models for Silicon and liquid water were introduced; the main multiple scattering model was consolidated; and the atomic de-excitation module has been made available to all models. As a result, Geant4 predictions for space radiation effects obtained with different Physics Lists are in better agreement with the benchmark data than previous Geant4 versions. Here we present results of electromagnetic tests and models comparison in the energy interval 10 eV - 10 MeV.

  12. A fast and efficient algorithm for Slater determinant updates in quantum Monte Carlo simulations.

    Science.gov (United States)

    Nukala, Phani K V V; Kent, P R C

    2009-05-28

    We present an efficient low-rank updating algorithm for updating the trial wave functions used in quantum Monte Carlo (QMC) simulations. The algorithm is based on low-rank updating of the Slater determinants. In particular, the computational complexity of the algorithm is O(kN) during the kth step compared to traditional algorithms that require O(N(2)) computations, where N is the system size. For single determinant trial wave functions the new algorithm is faster than the traditional O(N(2)) Sherman-Morrison algorithm for up to O(N) updates. For multideterminant configuration-interaction-type trial wave functions of M+1 determinants, the new algorithm is significantly more efficient, saving both O(MN(2)) work and O(MN(2)) storage. The algorithm enables more accurate and significantly more efficient QMC calculations using configuration-interaction-type wave functions.

  13. ROMI 4.0: Updated Rough Mill Simulator

    Science.gov (United States)

    Timo Grueneberg; R. Edward Thomas; Urs. Buehlmann

    2012-01-01

    In the secondary hardwood industry, rough mills convert hardwood lumber into dimension parts for furniture, cabinets, and other wood products. ROMI 4.0, the US Department of Agriculture Forest Service's ROugh-MIll simulator, is a software package designed to simulate the cut-up of hardwood lumber in rough mills in such a way that a maximum possible component yield...

  14. An Update on Simulating Imaging, Spectroscopic, and Coronagraphic PSFs for JWST (and WFIRST too!)

    Science.gov (United States)

    Perrin, Marshall D.; Long, Joseph D.; Zimmerman, Neil T.; Van Gorkom, Kyle

    2016-06-01

    Simulated point spread functions (PSFs) are an essential tool in preparing for future space telescopes, supporting pre-launch science simulations, observation planning, and analysis software development. The open-source Python package WebbPSF provides simulated PSFs for all of JWST's instruments and observing modes. We present the latest updates to WebbPSF based on both updated models ofthe assembled telescope optics and recent cryo-test data for the science instruments. Outputs from this latest version of WebbPSF will support the JWST Exposure Time Calculator and the first calls for proposals in the year ahead, among many other uses by the community. Furthermore, the same toolkit also now provides support for simulating PSFs for both the WFI and CGI instruments planned for WFIRST.

  15. [Simulation in healthcare in North America: update and evolution after two decades].

    Science.gov (United States)

    Boet, S; Jaffrelot, M; Naik, V N; Brien, S; Granry, J-C

    2014-05-01

    Update on simulation-based education and its evolution in North America. Main articles including those published within the last five years and indexed in Medline, and unpublished data from the Royal College of Physicians and Surgeons of Canada have been analyzed. After a review of historical development of simulation in North America, this article draw the place of simulation in healthcare, for medical education, research and assessment. Funding and accreditation of simulation centres are also discussed. Simulation is fully integrated in healthcare in North America and represents one of the main elements for healthcare professional education. Simulation is also a symbol of excellence for health and teaching institutions. The evolution of simulation in North America is likely to inform the future of simulation in France. Copyright © 2014 Société française d’anesthésie et de réanimation (Sfar). Published by Elsevier SAS. All rights reserved.

  16. Update on Healthcare Modeling and Simulation Certificate Program

    OpenAIRE

    Kennedy, Quinn; Walsh, Wendy; Sullivan, Joe

    2012-01-01

    MOVES Research & Education Systems Seminar: Presentation; Session 1: Educational Initiatives and Status, Moderator: Chris Darken; Medical Sim Certificate, Speaker Quinn Kennedy Overview: What is healthcare simulation and why is important?, The players, Program objectives and curriculum, Who are our target students, Progress report

  17. Model update and variability assessment for automotive crash simulations

    NARCIS (Netherlands)

    Sun, J.; He, J.; Vlahopoulos, N.; Ast, P. van

    2007-01-01

    In order to develop confidence in numerical models which are used for automotive crash simulations, results are often compared with test data, and in some cases the numerical models are adjusted in order to improve the correlation. Comparisons between the time history of acceleration responses from

  18. Polarized positrons for the ILC - update on simulations

    CERN Document Server

    Staufenbiel, F

    2012-01-01

    To achieve the extremely high luminosity for colliding electron-positron beams at the future International Linear Collider (ILC) an undulator-based source with about 230 meters helical undulator and a thin titanium-alloy target rim rotated with tangential velocity of about 100 meters per second are foreseen. The very high density of heat deposited in the target has to be analyzed carefully. The energy deposited by the photon beam in the target has been calculated in FLUKA. The resulting stress in the target material after one bunch train has been simulated in ANSYS.

  19. Updated vegetation information in high resolution WRF simulations

    DEFF Research Database (Denmark)

    Nielsen, Joakim Refslund; Dellwik, Ebba; Hahmann, Andrea N.

    2013-01-01

    modify the energy distribution at the land surface. In weather and climate models it is important to represent the vegetation variability accurately to obtain reliable results. The weather research and forecasting (WRF) model uses green vegetation fraction (GVF) time series to represent vegetation...... seasonality. The GVF of each grid cell is additionally used to scale other parameters such as LAI, roughness, emissivity and albedo within predefined intervals. However, the default GYP used by WRF does not reflect recent climatic changes or change in management practices since it was derived more than 20...... to a control run using the default GVF data and their performances are quantified against gridded data. The verification includes 2-m temperature and precipitation. The results show that although the simulation using the new GYP product performs well, it does not significantly improve performance compared...

  20. Updated aerosol module and its application to simulate secondary organic aerosols during IMPACT campaign May 2008

    Directory of Open Access Journals (Sweden)

    Y. P. Li

    2013-03-01

    Full Text Available The formation of Secondary organic aerosol (SOA was simulated with the Secondary ORGanic Aerosol Model (SORGAM by a classical gas-particle partitioning concept, using the two-product model approach, which is widely used in chemical transport models. In this study, we extensively updated SORGAM including three major modifications: firstly, we derived temperature dependence functions of the SOA yields for aromatics and biogenic VOCs, based on recent chamber studies within a sophisticated mathematic optimization framework; secondly, we implemented the SOA formation pathways from photo oxidation (OH initiated of isoprene; thirdly, we implemented the SOA formation channel from NO3-initiated oxidation of reactive biogenic hydrocarbons (isoprene and monoterpenes. The temperature dependence functions of the SOA yields were validated against available chamber experiments. Moreover, the whole updated SORGAM module was validated against ambient SOA observations represented by the summed oxygenated organic aerosol (OOA concentrations abstracted from Aerosol Mass Spectrometer (AMS measurements at a rural site near Rotterdam, the Netherlands, performed during the IMPACT campaign in May 2008. In this case, we embedded both the original and the updated SORGAM module into the EURopean Air pollution and Dispersion-Inverse Model (EURAD-IM, which showed general good agreements with the observed meteorological parameters and several secondary products such as O3, sulfate and nitrate. With the updated SORGAM module, the EURAD-IM model also captured the observed SOA concentrations reasonably well especially those during nighttime. In contrast, the EURAD-IM model before update underestimated the observations by a factor of up to 5. The large improvements of the modeled SOA concentrations by updated SORGAM were attributed to the mentioned three modifications. Embedding the temperature dependence functions of the SOA yields, including the new pathways from isoprene photo

  1. Updated aerosol module and its application to simulate secondary organic aerosols during IMPACT campaign May 2008

    Directory of Open Access Journals (Sweden)

    Y. P. Li

    2013-07-01

    Full Text Available The formation of Secondary organic aerosol (SOA was simulated with the Secondary ORGanic Aerosol Model (SORGAM by a classical gas-particle partitioning concept, using the two-product model approach, which is widely used in chemical transport models. In this study, we extensively updated SORGAM including three major modifications: firstly, we derived temperature dependence functions of the SOA yields for aromatics and biogenic VOCs (volatile organic compounds, based on recent chamber studies within a sophisticated mathematic optimization framework; secondly, we implemented the SOA formation pathways from photo oxidation (OH initiated of isoprene; thirdly, we implemented the SOA formation channel from NO3-initiated oxidation of reactive biogenic hydrocarbons (isoprene and monoterpenes. The temperature dependence functions of the SOA yields were validated against available chamber experiments, and the updated SORGAM with temperature dependence functions was evaluated with the chamber data. Good performance was found with the normalized mean error of less than 30%. Moreover, the whole updated SORGAM module was validated against ambient SOA observations represented by the summed oxygenated organic aerosol (OOA concentrations abstracted from aerosol mass spectrometer (AMS measurements at a rural site near Rotterdam, the Netherlands, performed during the IMPACT campaign in May 2008. In this case, we embedded both the original and the updated SORGAM module into the EURopean Air pollution and Dispersion-Inverse Model (EURAD-IM, which showed general good agreements with the observed meteorological parameters and several secondary products such as O3, sulfate and nitrate. With the updated SORGAM module, the EURAD-IM model also captured the observed SOA concentrations reasonably well especially those during nighttime. In contrast, the EURAD-IM model before update underestimated the observations by a factor of up to 5. The large improvements of the modeled

  2. Updated aerosol module and its application to simulate secondary organic aerosols during IMPACT campaign May 2008

    Science.gov (United States)

    Li, Y. P.; Elbern, H.; Lu, K. D.; Friese, E.; Kiendler-Scharr, A.; Mentel, Th. F.; Wang, X. S.; Wahner, A.; Zhang, Y. H.

    2013-07-01

    The formation of Secondary organic aerosol (SOA) was simulated with the Secondary ORGanic Aerosol Model (SORGAM) by a classical gas-particle partitioning concept, using the two-product model approach, which is widely used in chemical transport models. In this study, we extensively updated SORGAM including three major modifications: firstly, we derived temperature dependence functions of the SOA yields for aromatics and biogenic VOCs (volatile organic compounds), based on recent chamber studies within a sophisticated mathematic optimization framework; secondly, we implemented the SOA formation pathways from photo oxidation (OH initiated) of isoprene; thirdly, we implemented the SOA formation channel from NO3-initiated oxidation of reactive biogenic hydrocarbons (isoprene and monoterpenes). The temperature dependence functions of the SOA yields were validated against available chamber experiments, and the updated SORGAM with temperature dependence functions was evaluated with the chamber data. Good performance was found with the normalized mean error of less than 30%. Moreover, the whole updated SORGAM module was validated against ambient SOA observations represented by the summed oxygenated organic aerosol (OOA) concentrations abstracted from aerosol mass spectrometer (AMS) measurements at a rural site near Rotterdam, the Netherlands, performed during the IMPACT campaign in May 2008. In this case, we embedded both the original and the updated SORGAM module into the EURopean Air pollution and Dispersion-Inverse Model (EURAD-IM), which showed general good agreements with the observed meteorological parameters and several secondary products such as O3, sulfate and nitrate. With the updated SORGAM module, the EURAD-IM model also captured the observed SOA concentrations reasonably well especially those during nighttime. In contrast, the EURAD-IM model before update underestimated the observations by a factor of up to 5. The large improvements of the modeled SOA

  3. A stochastic model updating strategy-based improved response surface model and advanced Monte Carlo simulation

    Science.gov (United States)

    Zhai, Xue; Fei, Cheng-Wei; Choy, Yat-Sze; Wang, Jian-Jun

    2017-01-01

    To improve the accuracy and efficiency of computation model for complex structures, the stochastic model updating (SMU) strategy was proposed by combining the improved response surface model (IRSM) and the advanced Monte Carlo (MC) method based on experimental static test, prior information and uncertainties. Firstly, the IRSM and its mathematical model were developed with the emphasis on moving least-square method, and the advanced MC simulation method is studied based on Latin hypercube sampling method as well. And then the SMU procedure was presented with experimental static test for complex structure. The SMUs of simply-supported beam and aeroengine stator system (casings) were implemented to validate the proposed IRSM and advanced MC simulation method. The results show that (1) the SMU strategy hold high computational precision and efficiency for the SMUs of complex structural system; (2) the IRSM is demonstrated to be an effective model due to its SMU time is far less than that of traditional response surface method, which is promising to improve the computational speed and accuracy of SMU; (3) the advanced MC method observably decrease the samples from finite element simulations and the elapsed time of SMU. The efforts of this paper provide a promising SMU strategy for complex structure and enrich the theory of model updating.

  4. Simulation and analyses of the aeroassist flight experiment attitude update method

    Science.gov (United States)

    Carpenter, J. R.

    1991-06-01

    A method which will be used to update the alignment of the Aeroassist Flight Experiment's Inertial Measuring Unit is simulated and analyzed. This method, the Star Line Maneuver, uses measurements from the Space Shuttle Orbiter star trackers along with an extended Kalman filter to estimate a correction to the attitude quaternion maintained by an Inertial Measuring Unit in the Orbiter's payload bay. This quaternion is corrupted by on-orbit bending of the Orbiter payload bay with respect to the Orbiter navigation base, which is incorporated into the payload quaternion when it is initialized via a direct transfer of the Orbiter attitude state. The method of updating this quaternion is examined through verification of baseline cases and Monte Carlo analysis using a simplified simulation, The simulation uses nominal state dynamics and measurement models from the Kalman filter as its real world models, and is programmed on Microvax minicomputer using Matlab, and interactive matrix analysis tool. Results are presented which confirm and augment previous performance studies, thereby enhancing confidence in the Star Line Maneuver design methodology.

  5. Simulating atmospheric transport of the 2011 Grímsvötn ash cloud using a data insertion update scheme

    Science.gov (United States)

    Wilkins, K. L.; Western, L. M.; Watson, I. M.

    2016-09-01

    Effective modelling of atmospheric volcanic ash dispersion is important to ensure aircraft safety, and has been the subject of much study since the Eyjafjallajökull ash crisis in Europe in 2010. In this paper, a novel modelling method is presented, where the atmospheric transport of the 2011 Grímsvötn ash cloud is simulated using a data insertion update scheme. Output from the volcanic ash transport and dispersion model, NAME, is updated using satellite retrievals and the results of a probabilistic ash, cloud and clear sky classification algorithm. A range of configurations of the scheme are compared with each other, in addition to a simple data insertion method presented in a previous study. Results show that simulations in which ash layer heights and depths are updated using the model output generally perform worse in relation to satellite derived ash coverage and ash column loading than simulations that use satellite-retrieved heights and an assumed layer depth of 1.0 km. Simulated ash column loading and concentration tends to be under-predicted using this update scheme, but the timing of the arrival of the ash cloud at Stockholm is well captured, as shown by comparison with lidar-derived mass concentration profiles. Most of the updated simulations in this comparison make small gains in skill on the simple data insertion scheme.

  6. Simulation-based Estimation of Thermal Behavior of Direct Feed Drive Mechanism with Updated Finite Element Model

    Institute of Scientific and Technical Information of China (English)

    LIN Xiankun; LI Yanjun; LI Haolin

    2014-01-01

    Linear motors generate high heat and cause significant deformation in high speed direct feed drive mechanisms. It is relevant to estimate their deformation behavior to improve their application in precision machine tools. This paper describes a method to estimate its thermal deformation based on updated finite element(FE) model methods. Firstly, a FE model is established for a linear motor drive test rig that includes the correlation between temperature rise and its resulting deformation. The relationship between the input and output variables of the FE model is identified with a modified multivariate input/output least square support vector regression machine. Additionally, the temperature rise and displacements at some critical points on the mechanism are obtained experimentally by a system of thermocouples and an interferometer. The FE model is updated through intelligent comparison between the experimentally measured values and the results from the regression machine. The experiments for testing thermal behavior along with the updated FE model simulations is conducted on the test rig in reciprocating cycle drive conditions. The results show that the intelligently updated FE model can be implemented to analyze the temperature variation distribution of the mechanism and to estimate its thermal behavior. The accuracy of the thermal behavior estimation with the optimally updated method can be more than double that of the initial theoretical FE model. This paper provides a simulation method that is effective to estimate the thermal behavior of the direct feed drive mechanism with high accuracy.

  7. A gradual update method for simulating the steady-state solution of stiff differential equations in metabolic circuits.

    Science.gov (United States)

    Shiraishi, Emi; Maeda, Kazuhiro; Kurata, Hiroyuki

    2009-02-01

    Numerical simulation of differential equation systems plays a major role in the understanding of how metabolic network models generate particular cellular functions. On the other hand, the classical and technical problems for stiff differential equations still remain to be solved, while many elegant algorithms have been presented. To relax the stiffness problem, we propose new practical methods: the gradual update of differential-algebraic equations based on gradual application of the steady-state approximation to stiff differential equations, and the gradual update of the initial values in differential-algebraic equations. These empirical methods show a high efficiency for simulating the steady-state solutions for the stiff differential equations that existing solvers alone cannot solve. They are effective in extending the applicability of dynamic simulation to biochemical network models.

  8. Explicit incremental-update algorithm for modeling crystal elasto-viscoplastic response in finite element simulation

    Institute of Scientific and Technical Information of China (English)

    LI Hong-wei; YANG He; SUN Zhi-chao

    2006-01-01

    Computational stability and efficiency are the key problems for numerical modeling of crystal plasticity,which will limit its development and application in finite element (FE) simulation evidently. Since implicit iterative algorithms are inefficient and have difficulty to determine initial values,an explicit incremental-update algorithm for the elasto-viscoplastic constitutive relation was developed in the intermediate frame by using the second Piola-Kirchoff (P-K) stress and Green stain. The increment of stress and slip resistance were solved by a calculation loop of linear equations sets. The reorientation of the crystal as well as the elastic strain can be obtained from a polar decomposition of the elastic deformation gradient. User material subroutine VUMAT was developed to combine crystal elasto-viscoplastic constitutive model with ABAQUS/Explicit. Numerical studies were performed on a cubic upset model with OFHC material (FCC crystal). The comparison of the numerical results with those obtained by implicit iterative algorithm and those from experiments demonstrates that the explicit algorithm is reliable. Furthermore,the effect rules of material anisotropy,rate sensitivity coefficient (RSC) and loading speeds on the deformation were studied. The numerical studies indicate that the explicit algorithm is suitable and efficient for large deformation analyses where anisotropy due to texture is important.

  9. LightForce Photon-Pressure Collision Avoidance: Updated Efficiency Analysis Utilizing a Highly Parallel Simulation Approach

    Science.gov (United States)

    Stupl, J.; Faber, N.; Foster, C.; Yang, F.; Nelson, B.; Aziz, J.; Nuttall, A.; Henze, C.; Levit, C.

    2014-09-01

    This paper provides an updated efficiency analysis of the LightForce space debris collision avoidance scheme. LightForce aims to prevent collisions on warning by utilizing photon pressure from ground based, commercial off the shelf lasers. Past research has proven that a few ground-based systems consisting of 10 kW class lasers directed by 1.5 m telescopes with adaptive optics could lower the expected number of collisions in Low Earth Orbit (LEO) by an order of magnitude. Our simulation approach utilizes the entire Two Line Element (TLE) catalogue in LEO for a given day as initial input. Least-squares fitting of a TLE time series is used for an improved orbit estimate. We then calculate the probability of collision for all LEO objects in the catalogue for a time step of the simulation. The conjunctions that exceed a threshold probability of collision are then engaged by a simulated network of laser ground stations. After those engagements, the perturbed orbits are used to re-assess the probability of collision and evaluate the efficiency. This paper describes new simulations with three updated aspects: 1) By utilizing a highly parallel simulation approach employing hundreds of processors, we have extended our analysis to a much broader dataset. The simulation time is extended to one year. 2) We analyze not only the efficiency of LightForce on conjunctions that naturally occur, but also take into account conjunctions caused by orbit perturbations due to LightForce engagements. 3) We use a new simulation approach that is regularly updating the LightForce engagement strategy, as it would be during actual operations. In this paper we present both our simulation approach to parallelize the efficiency analysis, its computational performance and the resulting expected efficiency of the LightForce collision avoidance system.

  10. Recent updates of a GPM Radar Simulator using CRM data with Bulk Microphysics

    Science.gov (United States)

    Kim, H.; Meneghini, R.; Jones, J.; Liao, L.

    2012-12-01

    The goal of Global Precipitation Measurement (GPM) mission is to provide more accurate global precipitation information within ±65° latitude every 2~4 hour. GPM core satellite which carries the Dual-frequency Precipitation Radar (DPR) operating at Ku- and Ka-band will be launched in February, 2014. A number of radar precipitation retrieval algorithms are being developed for Level-2 radar processing. To support radar algorithm developers who need test data to evaluate the performance of their algorithm, a GPM radar simulator has been developed to generate synthetic Level-1 products which include the most important component, the received echo power, as well as radar parameters required for Level-2 algorithm processing. The GPM radar simulator consists of two modules. One is the DPR scanning geometry module that specifies the characteristics of the DPR sensor and emulates the scan and antenna geometry of the DPR. The other module is the forward calculation module that takes as input the prognostic variables (mixing ratio of hydrometeors) of high resolution cloud-resolving model data, using a one moment bulk microphysics scheme, and computes radar scattering parameters consistent with the microphysical assumptions of the hydrometeors. The forward calculation module also includes a surface scattering model to compute the radar return power from the illuminated surface area by means of a model for the normalized radar cross section (σ0 or NRCS), given as a function of incidence angle and surface type (land/ocean). The simulation of the surface return power plays an important role for one of primary DPR retrieval algorithms, the Surface Reference Technique (SRT), that estimates path-integrated attenuation (PIA) from the surface returns under rain and no-rain condition. Recently, we have completed an update of the surface scattering model for land. Like the NRCS over ocean, the NRCS over land is modeled by taking realizations from a jointly Gaussian random variable

  11. LightForce Photon-Pressure Collision Avoidance: Updated Efficiency Analysis Utilizing a Highly Parallel Simulation Approach

    Science.gov (United States)

    Stupl, Jan; Faber, Nicolas; Foster, Cyrus; Yang, Fan Yang; Nelson, Bron; Aziz, Jonathan; Nuttall, Andrew; Henze, Chris; Levit, Creon

    2014-01-01

    This paper provides an updated efficiency analysis of the LightForce space debris collision avoidance scheme. LightForce aims to prevent collisions on warning by utilizing photon pressure from ground based, commercial off the shelf lasers. Past research has shown that a few ground-based systems consisting of 10 kilowatt class lasers directed by 1.5 meter telescopes with adaptive optics could lower the expected number of collisions in Low Earth Orbit (LEO) by an order of magnitude. Our simulation approach utilizes the entire Two Line Element (TLE) catalogue in LEO for a given day as initial input. Least-squares fitting of a TLE time series is used for an improved orbit estimate. We then calculate the probability of collision for all LEO objects in the catalogue for a time step of the simulation. The conjunctions that exceed a threshold probability of collision are then engaged by a simulated network of laser ground stations. After those engagements, the perturbed orbits are used to re-assess the probability of collision and evaluate the efficiency of the system. This paper describes new simulations with three updated aspects: 1) By utilizing a highly parallel simulation approach employing hundreds of processors, we have extended our analysis to a much broader dataset. The simulation time is extended to one year. 2) We analyze not only the efficiency of LightForce on conjunctions that naturally occur, but also take into account conjunctions caused by orbit perturbations due to LightForce engagements. 3) We use a new simulation approach that is regularly updating the LightForce engagement strategy, as it would be during actual operations. In this paper we present our simulation approach to parallelize the efficiency analysis, its computational performance and the resulting expected efficiency of the LightForce collision avoidance system. Results indicate that utilizing a network of four LightForce stations with 20 kilowatt lasers, 85% of all conjunctions with a

  12. Large deformation simulation of anisotropic material using an updated Lagrangian finite element method

    NARCIS (Netherlands)

    Thije, ten R.H.W.; Akkerman, R.; Huetink, J.

    2007-01-01

    Large deformation finite element (FE) simulations of anisotropic material often show slow convergence or break down with increasing anisotropy and deformation. Large deformations are generally approximated by multiple small linearised steps. This leads to poor performance and contradicting formulati

  13. Migrating to a real-time distributed parallel simulator architecture- An update

    CSIR Research Space (South Africa)

    Duvenhage, B

    2007-09-01

    Full Text Available A legacy non-distributed logical time simulator was previously migrated to a distributed architecture to parallelise execution. The existing Discrete Time System Specification (DTSS) modelling formalism was retained to simplify the reuse of existing...

  14. Update on three-dimensional image reconstruction for preoperative simulation in thoracic surgery

    Science.gov (United States)

    Chen-Yoshikawa, Toyofumi F.

    2016-01-01

    Background Three-dimensional computed tomography (3D-CT) technologies have been developed and refined over time. Recently, high-speed and high-quality 3D-CT technologies have also been introduced to the field of thoracic surgery. The purpose of this manuscript is to demonstrate several examples of these 3D-CT technologies in various scenarios in thoracic surgery. Methods A newly-developed high-speed and high-quality 3D image analysis software system was used in Kyoto University Hospital. Simulation and/or navigation were performed using this 3D-CT technology in various thoracic surgeries. Results Preoperative 3D-CT simulation was performed in most patients undergoing video-assisted thoracoscopic surgery (VATS). Anatomical variation was frequently detected preoperatively, which was useful in performing VATS procedures when using only a monitor for vision. In sublobar resection, 3D-CT simulation was more helpful. In small lung lesions, which were supposedly neither visible nor palpable, preoperative marking of the lesions was performed using 3D-CT simulation, and wedge resection or segmentectomy was successfully performed with confidence. This technique also enabled virtual-reality endobronchial ultrasonography (EBUS), which made the procedure more safe and reliable. Furthermore, in living-donor lobar lung transplantation (LDLLT), surgical procedures for donor lobectomy were simulated preoperatively by 3D-CT angiography, which also affected surgical procedures for recipient surgery. New surgical techniques such as right and left inverted LDLLT were also established using 3D models created with this technique. Conclusions After the introduction of 3D-CT technology to the field of thoracic surgery, preoperative simulation has been developed for various thoracic procedures. In the near future, this technique will become more common in thoracic surgery, and frequent use by thoracic surgeons will be seen in worldwide daily practice. PMID:27014477

  15. An Updated Geophysical Model for AMSR-E and SSMIS Brightness Temperature Simulations over Oceans

    Directory of Open Access Journals (Sweden)

    Elizaveta Zabolotskikh

    2014-03-01

    Full Text Available In this study, we considered the geophysical model for microwave brightness temperature (BT simulation for the Atmosphere-Ocean System under non-precipitating conditions. The model is presented as a combination of atmospheric absorption and ocean emission models. We validated this model for two satellite instruments—for Advanced Microwave Sounding Radiometer-Earth Observing System (AMSR-E onboard Aqua satellite and for Special Sensor Microwave Imager/Sounder (SSMIS onboard F16 satellite of Defense Meteorological Satellite Program (DMSP series. We compared simulated BT values with satellite BT measurements for different combinations of various water vapor and oxygen absorption models and wind induced ocean emission models. A dataset of clear sky atmospheric and oceanic parameters, collocated in time and space with satellite measurements, was used for the comparison. We found the best model combination, providing the least root mean square error between calculations and measurements. A single combination of models ensured the best results for all considered radiometric channels. We also obtained the adjustments to simulated BT values, as averaged differences between the model simulations and satellite measurements. These adjustments can be used in any research based on modeling data for removing model/calibration inconsistencies. We demonstrated the application of the model by means of the development of the new algorithm for sea surface wind speed retrieval from AMSR-E data.

  16. Disability Simulations: Using the Social Model of Disability to Update an Experiential Educational Practice

    Science.gov (United States)

    Barney, Keith W.

    2012-01-01

    Disability simulation as a form of experiential learning has been a popular way for students to "learn what it is like to have a disability" in many different educational curricula from nursing to recreation. There is a lack of research detailing the efficacy of such activities, and some researchers have noted the possibility of negative results.…

  17. Update on 3D Moving Mesh Simulations of Galactic Center Cloud G2

    CERN Document Server

    Fragile, P Chris; Murray, Stephen D

    2014-01-01

    Using three-dimensional, moving-mesh simulations, we investigate the future evolution of the recently discovered gas cloud G2 traveling through the galactic center. From our simulations we expect an average feeding rate onto Sgr A* in the range of $(5-19) \\times 10^{-8} M_\\odot\\mathrm{~yr}^{-1}$ beginning in 2014. This accretion varies by less than a factor of three on timescales of about 1 month, and shows no more than a factor of 10 difference between the maximum and minimum observed rates within any given model. These rates are comparable to the current estimated accretion rate in the immediate vicinity of Sgr A*, although they represent only a small (<10%) increase over the current expected feeding rate at the effective inner boundary of our simulations $(r_\\mathrm{acc} = 750 R_S \\sim 10^{15} \\mathrm{cm})$. We also explore multiple possible equations of state to describe the gas. In examining the Br-$\\gamma$ light curves produced from our simulations, we find that all of our isothermal models predict s...

  18. Disability Simulations: Using the Social Model of Disability to Update an Experiential Educational Practice

    Science.gov (United States)

    Barney, Keith W.

    2012-01-01

    Disability simulation as a form of experiential learning has been a popular way for students to "learn what it is like to have a disability" in many different educational curricula from nursing to recreation. There is a lack of research detailing the efficacy of such activities, and some researchers have noted the possibility of negative results.…

  19. Intermediate-mass black holes in globular clusters: observations and simulations - Update

    Science.gov (United States)

    Lützgendorf, Nora; Kissler-Patig, Markus; Gebhardt, Karl; Baumgardt, Holger; Kruijssen, Diederik; Noyola, Eva; Neumayer, Nadine; de Zeeuw, Tim; Feldmeier-Krause, Anja; van der Helm, Edwin; Pelupessy, Inti; Zwart, Simon Portegies

    2017-03-01

    The study of intermediate-mass black holes (IMBHs) is a young and promising field of research. If IMBH exist, they could explain the rapid growth of supermassive black holes by acting as seeds in the early stage of galaxy formation. Formed by runaway collisions of massive stars in young and dense stellar clusters, intermediate-mass black holes could still be present in the centers of globular clusters, today. We measured the inner kinematic profiles with integral-field spectroscopy for 10 Galactic globular cluster and determined masses or upper limits of central black holes. In combination with literature data we further studied the positions of our results on known black-hole scaling relations (such as M • - σ) and found a similar but flatter correlation for IMBHs. Applying cluster evolution codes, the change in the slope could be explained with the stellar mass loss occurring in clusters in a tidal field over its life time. Furthermore, we present results from several numerical simulations on the topic of IMBHs and integral field units (IFUs). N-body simulations were used to simulate IFU data cubes. For the specific case of NGC 6388 we simulated two different IFU techniques and found that velocity dispersion measurements from individual velocities are strongly biased towards lower values due to blends of neighbouring stars and background light. In addition, we use the Astrophysical Multipurpose Software Environment (AMUSE) to combine gravitational physics, stellar evolution and hydrodynamics to simulate the accretion of stellar winds onto a black hole. We find that the S-stars need to provide very strong winds in order to explain the accretion rate in the galactic center.

  20. Updated vegetation information in high resolution regional climate simulations using WRF

    DEFF Research Database (Denmark)

    Nielsen, Joakim Refslund; Dellwik, Ebba; Hahmann, Andrea N.

    modify the energy distribution at the land surface. In weather and climate models it is important to represent the vegetation variability accurately to obtain reliable results. The weather research and forecasting (WRF) model uses a green vegetation fraction (GVF) climatology to represent the seasonal...... or changes in management practice since it is derived more than twenty years ago. In this study, a new high resolution, high quality GVF product is applied in a WRF climate simulation over Denmark during the 2006 heat wave year. The new GVF product reflects the year 2006 and it was previously tested...... in a climate run at low spatial resolution showing good performance. The new simulations are carried out at higher resolution and the performance is quantified against (1) a control run using the default GVF data and (2) two gridded data sets (E-OBS and DMI Climate grid) at lower resolution for which...

  1. Hypocenter determination using simulated annealing, updated 1D seismic velocity model and focal mechanism analysis

    Science.gov (United States)

    Akbar, Akhmad Fanani; Nugraha, Andri Dian; Sule, Rachmat; Juanda, Aditya Abdurrahman

    2013-09-01

    Hypocenter determination of micro-earthquakes of Mount "X-1" geothermal field has been conducted using simulated annealing and guided error search method using a 1D seismic velocity model. In order to speed up the hypocenter determination process a three-circle intersection method has been used to guide the simulated annealing and guided error search process. We used P and S arrival time's microseismic data. In the simulated annealing and guided error search processes, the minimum travel time from a source to a receiver has been calculated by employing ray tracing with shooting method. The resulting hypocenters from the above process occurred at depths of 3-4 km below mean sea level. These hypocenter distributions are correlated with previous study which was concluded that the most active microseismic area in which the site of many fractures and also vertical circulation place. Later on, resulting hypocenters location was used as input to determine 1-D seismic velocity using joint hypocenter determination method. The results of VELEST indicate show low Vp/Vs ratio value at depths of 3-4 km. Our interpretation is this anomaly may be related to a rock layer which is saturated by vapor (gas or steam). Another feature is high Vp/Vs ratio value at depths of 1-3 km that may related to a rock layer which is saturated by fluid or partial melting. We also analyze the focal mechanism of microseismic using ISOLA method to determine the source characteristic of this event.

  2. An Updated Coupled Model for Land-Atmosphere Interaction. Part Ⅰ: Simulations of Physical Processes

    Institute of Scientific and Technical Information of China (English)

    ZENG Hongling; WANG Zaizhi; JI Jinjun; WU Guoxiong

    2008-01-01

    A new two-way land-atmosphere interaction model (R42_AVIM) is fulfilled by coupling the spectral at- mospheric model (SAMIL_R42L9) developed at the State Key Laboratory of Numerical Modeling for Atmo- spheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sci- ences (LASG/IAP/CAS) with the land surface model, Atmosphere-Vegetation-Interaction-Model (AVIM). In this coupled model, physical and biological components of AVIM are both included. Climate base state and land surface physical fluxes simulated by R42_AVIM are analyzed and compared with the results of R42_SSIB [which is coupled by SAMIL_R42L9 and Simplified Simple Biosphere (SSIB) models]. The results show the performance of the new model is closer to the observations. It can basically guarantee that the land surface energy budget is balanced, and can simulate June-July-August (JJA) and December-January- February (DJF) land surface air temperature, sensible heat flux, latent heat flux, precipitation, sea level pressure and other variables reasonably well. Compared with R42_SSIB, there are obvious improvements in the JJA simulations of surface air temperature and surface fluxes. Thus, this land-atmosphere coupled model will offer a good experiment platform for land-atmosphere interaction research.

  3. Update: Advancement of Contact Dynamics Modeling for Human Spaceflight Simulation Applications

    Science.gov (United States)

    Brain, Thomas A.; Kovel, Erik B.; MacLean, John R.; Quiocho, Leslie J.

    2017-01-01

    Pong is a new software tool developed at the NASA Johnson Space Center that advances interference-based geometric contact dynamics based on 3D graphics models. The Pong software consists of three parts: a set of scripts to extract geometric data from 3D graphics models, a contact dynamics engine that provides collision detection and force calculations based on the extracted geometric data, and a set of scripts for visualizing the dynamics response with the 3D graphics models. The contact dynamics engine can be linked with an external multibody dynamics engine to provide an integrated multibody contact dynamics simulation. This paper provides a detailed overview of Pong including the overall approach and modeling capabilities, which encompasses force generation from contact primitives and friction to computational performance. Two specific Pong-based examples of International Space Station applications are discussed, and the related verification and validation using this new tool are also addressed.

  4. Update on single-screw expander geometry model integrated into an open-source simulation tool

    Science.gov (United States)

    Ziviani, D.; Bell, I. H.; De Paepe, M.; van den Broek, M.

    2015-08-01

    In this paper, a mechanistic steady-state model of a single-screw expander is described with emphasis on the geometric description. Insights into the calculation of the main parameters and the definition of the groove profile are provided. Additionally, the adopted chamber model is discussed. The model has been implemented by means of the open-source software PDSim (Positive Displacement SIMulation), written in the Python language, and the solution algorithm is described. The single-screw expander model is validated with a set of steady-state measurement points collected from a 11 kWe organic Rankine cycle test-rig with SES36 and R245fa as working fluid. The overall performance and behavior of the expander are also further analyzed.

  5. Updated evaluation of the migration of styrene monomer and oligomers from polystyrene food contact materials to foods and food simulants.

    Science.gov (United States)

    Genualdi, Susan; Nyman, Patricia; Begley, Timothy

    2014-04-01

    Due to the 2011 labelling of styrene monomer as "reasonably anticipated to be a human carcinogen" by the National Institutes of Health's National Toxicology Program (NTP) and the controversy over whether styrene oligomers mimic the physiological effects of estrogen, an updated review of styrene monomer and oligomers in food and food contact materials (FCMs) was performed. The concentrations of styrene monomer and oligomers were determined in 24 polystyrene (PS) products and ranged from 9.3 to 3100 mg kg(-1) for the styrene monomer, 130-2900 mg kg(-1) for the sum of three styrene dimers, and 220-16,000 mg kg(-1) for the sum of six styrene trimers. Foods in contact with PS packaging had styrene monomer concentrations ranging from 2.6 to 163 ng g(-1); dimer concentrations from the limit of quantitation (LOQ) to 4.8 ng g(-1) and trimer concentrations were all below the LOQ (2 ng g(-1)). Diffusion coefficients (Dp) and partition coefficients (K) were also calculated for styrene dimers and trimers. The results presented here indicate that styrene monomer concentrations in foods have not significantly changed since the 1980s and monomer concentrations in food packaging quantified in this study were all below USFDA limits. Although styrene dimers and trimers are present in higher concentrations in PS FCMs than the monomer, their migration to food is limited because of their high K values (4 × 10(2) to 2 × 10(6)) and their low diffusion coefficients in PS products. Additionally, diffusion coefficients calculated using USFDA-recommended food simulants and Arrhenius plots describing the temperature dependence of styrene dimers and trimers can be used in future calculations of dietary intake of the styrene oligomers.

  6. Evaluation of the groundwater flow model for southern Utah and Goshen Valleys, Utah, updated to conditions through 2011, with new projections and groundwater management simulations

    Science.gov (United States)

    Brooks, Lynette E.

    2013-01-01

    The U.S. Geological Survey (USGS), in cooperation with the Southern Utah Valley Municipal Water Association, updated an existing USGS model of southern Utah and Goshen Valleys for hydrologic and climatic conditions from 1991 to 2011 and used the model for projection and groundwater management simulations. All model files used in the transient model were updated to be compatible with MODFLOW-2005 and with the additional stress periods. The well and recharge files had the most extensive changes. Discharge to pumping wells in southern Utah and Goshen Valleys was estimated and simulated on an annual basis from 1991 to 2011. Recharge estimates for 1991 to 2011 were included in the updated model by using precipitation, streamflow, canal diversions, and irrigation groundwater withdrawals for each year. The model was evaluated to determine how well it simulates groundwater conditions during recent increased withdrawals and drought, and to determine if the model is adequate for use in future planning. In southern Utah Valley, the magnitude and direction of annual water-level fluctuation simulated by the updated model reasonably match measured water-level changes, but they do not simulate as much decline as was measured in some locations from 2000 to 2002. Both the rapid increase in groundwater withdrawals and the total groundwater withdrawals in southern Utah Valley during this period exceed the variations and magnitudes simulated during the 1949 to 1990 calibration period. It is possible that hydraulic properties may be locally incorrect or that changes, such as land use or irrigation diversions, occurred that are not simulated. In the northern part of Goshen Valley, simulated water-level changes reasonably match measured changes. Farther south, however, simulated declines are much less than measured declines. Land-use changes indicate that groundwater withdrawals in Goshen Valley are possibly greater than estimated and simulated. It is also possible that irrigation

  7. Challenges while Updating Planning Parameters of an ERP System and How a Simulation-Based Support System Can Support Material Planners

    Directory of Open Access Journals (Sweden)

    Ulrike Stumvoll

    2016-01-01

    Full Text Available In an Enterprise Resource Planning (ERP system, production planning is influenced by a variety of parameters. Previous investigations show that setting parameter values is highly relevant to a company’s target system. Parameter settings should be checked and adjusted, e.g., after a change in environmental factors, by material planners. In practice, updating the parameters is difficult due to several reasons. This paper presents a simulation-based decision support system, which helps material planners in all stages of decision-making processes. It will present the system prototype’s user interface and the results of applying the system to a case study.

  8. The New Numerical Galaxy Catalog (ν2GC): An updated semi-analytic model of galaxy and active galactic nucleus formation with large cosmological N-body simulations

    Science.gov (United States)

    Makiya, Ryu; Enoki, Motohiro; Ishiyama, Tomoaki; Kobayashi, Masakazu A. R.; Nagashima, Masahiro; Okamoto, Takashi; Okoshi, Katsuya; Oogi, Taira; Shirakata, Hikari

    2016-04-01

    We present a new cosmological galaxy formation model, ν2GC, as an updated version of our previous model νGC. We adopt the so-called "semi-analytic" approach, in which the formation history of dark matter halos is computed by N-body simulations, while the baryon physics such as gas cooling, star formation, and supernova feedback are simply modeled by phenomenological equations. Major updates of the model are as follows: (1) the merger trees of dark matter halos are constructed in state-of-the-art N-body simulations, (2) we introduce the formation and evolution process of supermassive black holes and the suppression of gas cooling due to active galactic nucleus (AGN) activity, (3) we include heating of the intergalactic gas by the cosmic UV background, and (4) we tune some free parameters related to the astrophysical processes using a Markov chain Monte Carlo method. Our N-body simulations of dark matter halos have unprecedented box size and mass resolution (the largest simulation contains 550 billion particles in a 1.12 Gpc h-1 box), enabling the study of much smaller and rarer objects. The model was tuned to fit the luminosity functions of local galaxies and mass function of neutral hydrogen. Local observations, such as the Tully-Fisher relation, the size-magnitude relation of spiral galaxies, and the scaling relation between the bulge mass and black hole mass were well reproduced by the model. Moreover, the model also reproduced well the cosmic star formation history and redshift evolution of rest-frame K-band luminosity functions. The numerical catalog of the simulated galaxies and AGNs is publicly available on the web.

  9. Documentation of the dynamic parameter, water-use, stream and lake flow routing, and two summary output modules and updates to surface-depression storage simulation and initial conditions specification options with the Precipitation-Runoff Modeling System (PRMS)

    Science.gov (United States)

    Regan, R. Steve; LaFontaine, Jacob H.

    2017-10-05

    This report documents seven enhancements to the U.S. Geological Survey (USGS) Precipitation-Runoff Modeling System (PRMS) hydrologic simulation code: two time-series input options, two new output options, and three updates of existing capabilities. The enhancements are (1) new dynamic parameter module, (2) new water-use module, (3) new Hydrologic Response Unit (HRU) summary output module, (4) new basin variables summary output module, (5) new stream and lake flow routing module, (6) update to surface-depression storage and flow simulation, and (7) update to the initial-conditions specification. This report relies heavily upon U.S. Geological Survey Techniques and Methods, book 6, chapter B7, which documents PRMS version 4 (PRMS-IV). A brief description of PRMS is included in this report.

  10. Website updates

    Data.gov (United States)

    National Aeronautics and Space Administration — Updates to Website: (Please add new items at the top of this description with the date of the website change) May 9, 2012: Uploaded experimental data in matlab...

  11. Circular Updates

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Circular Updates are periodic sequentially numbered instructions to debriefing staff and observers informing them of changes or additions to scientific and specimen...

  12. Cybersecurity Update

    CERN Document Server

    Heagerty, Denise

    2008-01-01

    An update on recent security issues and vulnerabilities affecting Windows, Linux and Mac platforms. This talk is based on contributions and input from a range of colleagues both within and outside CERN. It covers clients, servers and control systems.

  13. Update on ORNL TRANSFORM Tool: Simulating Multi-Module Advanced Reactor with End-to-End I&C

    Energy Technology Data Exchange (ETDEWEB)

    Hale, Richard Edward [ORNL; Fugate, David L [ORNL; Cetiner, Sacit M [ORNL; Qualls, A L [ORNL

    2015-05-01

    The Small Modular Reactor (SMR) Dynamic System Modeling Tool project is in the fourth year of development. The project is designed to support collaborative modeling and study of various advanced SMR (non-light water cooled reactor) concepts, including the use of multiple coupled reactors at a single site. The focus of this report is the development of a steam generator and drum system model that includes the complex dynamics of typical steam drum systems, the development of instrumentation and controls for the steam generator with drum system model, and the development of multi-reactor module models that reflect the full power reactor innovative small module design concept. The objective of the project is to provide a common simulation environment and baseline modeling resources to facilitate rapid development of dynamic advanced reactor models; ensure consistency among research products within the Instrumentation, Controls, and Human-Machine Interface technical area; and leverage cross-cutting capabilities while minimizing duplication of effort. The combined simulation environment and suite of models are identified as the TRANSFORM tool. The critical elements of this effort include (1) defining a standardized, common simulation environment that can be applied throughout the Advanced Reactors Technology program; (2) developing a library of baseline component modules that can be assembled into full plant models using available geometry, design, and thermal-hydraulic data; (3) defining modeling conventions for interconnecting component models; and (4) establishing user interfaces and support tools to facilitate simulation development (i.e., configuration and parameterization), execution, and results display and capture.

  14. Updates to the Generation of Physics Data Inputs for MAMMOTH Simulations of the Transient Reactor Test Facility - FY2016

    Energy Technology Data Exchange (ETDEWEB)

    Ortensi, Javier [Idaho National Lab. (INL), Idaho Falls, ID (United States); Baker, Benjamin Allen [Idaho National Lab. (INL), Idaho Falls, ID (United States); Schunert, Sebastian [Idaho National Lab. (INL), Idaho Falls, ID (United States); Wang, Yaqi [Idaho National Lab. (INL), Idaho Falls, ID (United States); Gleicher, Frederick Nathan [Idaho National Lab. (INL), Idaho Falls, ID (United States); DeHart, Mark David [Idaho National Lab. (INL), Idaho Falls, ID (United States)

    2016-06-01

    The INL is currently evolving the modeling and simulation (M&S) capability that will enable improved core operation as well as design and analysis of TREAT experiments. This M&S capability primarily uses MAMMOTH, a reactor physics application being developed under Multi-physics Object Oriented Simulation Environment (MOOSE) framework. MAMMOTH allows the coupling of a number of other MOOSE-based applications. This second year of work has been devoted to the generation of a deterministic reference solution for the full core, the preparation of anisotropic diffusion coefficients, the testing of the SPH equivalence method, and the improvement of the control rod modeling. In addition, this report includes the progress made in the modeling of the M8 core configuration and experiment vehicle since January of this year.

  15. The updated algorithm of the Energy Consumption Program (ECP): A computer model simulating heating and cooling energy loads in buildings

    Science.gov (United States)

    Lansing, F. L.; Strain, D. M.; Chai, V. W.; Higgins, S.

    1979-01-01

    The energy Comsumption Computer Program was developed to simulate building heating and cooling loads and compute thermal and electric energy consumption and cost. This article reports on the new additional algorithms and modifications made in an effort to widen the areas of application. The program structure was rewritten accordingly to refine and advance the building model and to further reduce the processing time and cost. The program is noted for its very low cost and ease of use compared to other available codes. The accuracy of computations is not sacrificed however, since the results are expected to lie within + or - 10% of actual energy meter readings.

  16. Update on design simulations for NIF ignition targets, and the rollup of all specifications into an error budget

    Science.gov (United States)

    Haan, S. W.; Herrmann, M. C.; Salmonson, J. D.; Amendt, P. A.; Callahan, D. A.; Dittrich, T. R.; Edwards, M. J.; Jones, O. S.; Marinak, M. M.; Munro, D. H.; Pollaine, S. M.; Spears, B. K.; Suter, L. J.

    2007-08-01

    Targets intended to produce ignition on NIF are being simulated and the simulations are used to set specifications for target fabrication and other program elements. Recent design work has focused on designs that assume only 1.0 MJ of laser energy instead of the previous 1.6 MJ. To perform with less laser energy, the hohlraum has been redesigned to be more efficient than previously, and the capsules are slightly smaller. Three hohlraum designs are being examined: gas fill, SiO2 foam fill, and SiO2 lined. All have a cocktail wall, and shields mounted between the capsule and the laser entrance holes. Two capsule designs are being considered. One has a graded doped Be(Cu) ablator, and the other graded doped CH(Ge). Both can perform acceptably with recently demonstrated ice layer quality, and with recently demonstrated outer surface roughness. Complete tables of specifications are being prepared for both targets, to be completed this fiscal year. All the specifications are being rolled together into an error budget indicating adequate margin for ignition with the new designs. The dominant source of error is hohlraum asymmetry at intermediate modes 4 8, indicating the importance of experimental techniques to measure and control this asymmetry.

  17. CATL Update

    Science.gov (United States)

    2011-03-24

    2010 Report sent NATC CATL 1922 20K Treadwear Bridgestone 2 LT235/85R16 (L/R E) GMC 2500 (2WD) Awaiting new control tire NATC CATL 1922 20K Treadwear...1 DSCC Annual Tire Conference CATL UPDATE March 24, 2011 UNCLASSIFIED: Dist A. Approved for public release Report Documentation Page...A 3. DATES COVERED - 4. TITLE AND SUBTITLE CATL Update 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d

  18. Ukraine Poverty Update

    OpenAIRE

    2007-01-01

    Ukraine recorded one of the sharpest declines in poverty of any transition economy in recent years. The poverty rate, measured against an absolute poverty line, fell from a high of 32 percent in 2001 to 14 percent in 2004, and then again to 8 percent in 2005. This Update presents simulations of the direct influence of an increase in energy prices on the poverty rate. Using 2005 as a base p...

  19. The 6 and 130 kyr BP climates as simulated by an updated version of LOVECLIM1.2

    Science.gov (United States)

    Loutre, M.-F.; Fichefet, T.; Goosse, H.; Barriat, P.-Y.; Sallaz-Damaz, Y.; Timmermann, A.; Laurian, A.; Barthélemy, A.

    2012-04-01

    New modules are included in LOVECLIM1.2 (Goosse et al, 2010). First, a modified atmospheric balance equation is implemented. It links the computed changes of the atmospheric streamfunction with the geopotential height at each level (ABEL) by representing the effect of divergent winds on the streamfunction (Timmermann, 2011, personnal communication). Second, a parameterisation of katabatic winds is implemented (KATA). Their impact on the Antarctic sea ice is represented through constant corrections applied to the ice transport in the vicinity of the coast (Barthelemy, 2011). Third, an empirical diagnostic cloud scheme, based on the ERA-40 reanalysis data (Uppala et al., 2005), is introduced in LOVECLIM to address cloud feedbacks (Timmermann, 2011, personnal communication) (CLOU). This modified version of LOVECLIM has been tested under pre-industrial, mid-holocene (6 kyr BP) and last interglacial (130 kyr BP) forcing conditions. Two setups were used and compared to LOVECLIM1.2, i.e. AK01, which includes both ABEL and KATA, and AK02, which also includes CLOU. First, AK01 and AK02 simulated climates are compared to the LOVECLIM1.2 one. Both AK01 and AK02 induce a global annual mean cooling of 0.4C for the pre-industrial period, and of 0.3C at 6 kyr and at 130 kyr BP. In summer (JJAS) the cooling is mostly located over continents and tropical areas. There is also a strong cooling off Antarctica in the Weddell Sea, while the Pacific sector of the Southern Ocean experiences a warming. In both cases (AK01 and AK02), summer precipitation is reduced in equatorial regions (mostly over the Indian and Pacific Oceans) and enhanced in tropical regions, especially over North Africa. Second, the simulated Holocene (6 kyr BP) and pre-industrial (present) climate are compared. On global annual mean, the surface temperature is 0.3C higher at 6 kyr BP than at present. The warming in summer (JJAS) is the largest in the high northern latitudes, especially over Greenland and North America

  20. Fully iterative scatter corrected digital breast tomosynthesis using GPU-based fast Monte Carlo simulation and composition ratio update

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Kyungsang; Ye, Jong Chul, E-mail: jong.ye@kaist.ac.kr [Bio Imaging and Signal Processing Laboratory, Department of Bio and Brain Engineering, KAIST 291, Daehak-ro, Yuseong-gu, Daejeon 34141 (Korea, Republic of); Lee, Taewon; Cho, Seungryong [Medical Imaging and Radiotherapeutics Laboratory, Department of Nuclear and Quantum Engineering, KAIST 291, Daehak-ro, Yuseong-gu, Daejeon 34141 (Korea, Republic of); Seong, Younghun; Lee, Jongha; Jang, Kwang Eun [Samsung Advanced Institute of Technology, Samsung Electronics, 130, Samsung-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 443-803 (Korea, Republic of); Choi, Jaegu; Choi, Young Wook [Korea Electrotechnology Research Institute (KERI), 111, Hanggaul-ro, Sangnok-gu, Ansan-si, Gyeonggi-do, 426-170 (Korea, Republic of); Kim, Hak Hee; Shin, Hee Jung; Cha, Joo Hee [Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro, 43-gil, Songpa-gu, Seoul, 138-736 (Korea, Republic of)

    2015-09-15

    Purpose: In digital breast tomosynthesis (DBT), scatter correction is highly desirable, as it improves image quality at low doses. Because the DBT detector panel is typically stationary during the source rotation, antiscatter grids are not generally compatible with DBT; thus, a software-based scatter correction is required. This work proposes a fully iterative scatter correction method that uses a novel fast Monte Carlo simulation (MCS) with a tissue-composition ratio estimation technique for DBT imaging. Methods: To apply MCS to scatter estimation, the material composition in each voxel should be known. To overcome the lack of prior accurate knowledge of tissue composition for DBT, a tissue-composition ratio is estimated based on the observation that the breast tissues are principally composed of adipose and glandular tissues. Using this approximation, the composition ratio can be estimated from the reconstructed attenuation coefficients, and the scatter distribution can then be estimated by MCS using the composition ratio. The scatter estimation and image reconstruction procedures can be performed iteratively until an acceptable accuracy is achieved. For practical use, (i) the authors have implemented a fast MCS using a graphics processing unit (GPU), (ii) the MCS is simplified to transport only x-rays in the energy range of 10–50 keV, modeling Rayleigh and Compton scattering and the photoelectric effect using the tissue-composition ratio of adipose and glandular tissues, and (iii) downsampling is used because the scatter distribution varies rather smoothly. Results: The authors have demonstrated that the proposed method can accurately estimate the scatter distribution, and that the contrast-to-noise ratio of the final reconstructed image is significantly improved. The authors validated the performance of the MCS by changing the tissue thickness, composition ratio, and x-ray energy. The authors confirmed that the tissue-composition ratio estimation was quite

  1. Fully iterative scatter corrected digital breast tomosynthesis using GPU-based fast Monte Carlo simulation and composition ratio update.

    Science.gov (United States)

    Kim, Kyungsang; Lee, Taewon; Seong, Younghun; Lee, Jongha; Jang, Kwang Eun; Choi, Jaegu; Choi, Young Wook; Kim, Hak Hee; Shin, Hee Jung; Cha, Joo Hee; Cho, Seungryong; Ye, Jong Chul

    2015-09-01

    In digital breast tomosynthesis (DBT), scatter correction is highly desirable, as it improves image quality at low doses. Because the DBT detector panel is typically stationary during the source rotation, antiscatter grids are not generally compatible with DBT; thus, a software-based scatter correction is required. This work proposes a fully iterative scatter correction method that uses a novel fast Monte Carlo simulation (MCS) with a tissue-composition ratio estimation technique for DBT imaging. To apply MCS to scatter estimation, the material composition in each voxel should be known. To overcome the lack of prior accurate knowledge of tissue composition for DBT, a tissue-composition ratio is estimated based on the observation that the breast tissues are principally composed of adipose and glandular tissues. Using this approximation, the composition ratio can be estimated from the reconstructed attenuation coefficients, and the scatter distribution can then be estimated by MCS using the composition ratio. The scatter estimation and image reconstruction procedures can be performed iteratively until an acceptable accuracy is achieved. For practical use, (i) the authors have implemented a fast MCS using a graphics processing unit (GPU), (ii) the MCS is simplified to transport only x-rays in the energy range of 10-50 keV, modeling Rayleigh and Compton scattering and the photoelectric effect using the tissue-composition ratio of adipose and glandular tissues, and (iii) downsampling is used because the scatter distribution varies rather smoothly. The authors have demonstrated that the proposed method can accurately estimate the scatter distribution, and that the contrast-to-noise ratio of the final reconstructed image is significantly improved. The authors validated the performance of the MCS by changing the tissue thickness, composition ratio, and x-ray energy. The authors confirmed that the tissue-composition ratio estimation was quite accurate under a variety of

  2. Decentralized Consistent Updates in SDN

    KAUST Repository

    Nguyen, Thanh Dang

    2017-04-10

    We present ez-Segway, a decentralized mechanism to consistently and quickly update the network state while preventing forwarding anomalies (loops and blackholes) and avoiding link congestion. In our design, the centralized SDN controller only pre-computes information needed by the switches during the update execution. This information is distributed to the switches, which use partial knowledge and direct message passing to efficiently realize the update. This separation of concerns has the key benefit of improving update performance as the communication and computation bottlenecks at the controller are removed. Our evaluations via network emulations and large-scale simulations demonstrate the efficiency of ez-Segway, which compared to a centralized approach, improves network update times by up to 45% and 57% at the median and the 99th percentile, respectively. A deployment of a system prototype in a real OpenFlow switch and an implementation in P4 demonstrate the feasibility and low overhead of implementing simple network update functionality within switches.

  3. Regular database update logics

    NARCIS (Netherlands)

    Spruit, Paul; Wieringa, Roel; Meyer, John-Jules

    2001-01-01

    We study regular first-order update logic (FUL), which is a variant of regular dynamic logic in which updates to function symbols as well as to predicate symbols are possible. We fi1rst study FUL without making assumptions about atomic updates. Second, we look at relational algebra update logic (RAU

  4. Varieties of update

    Directory of Open Access Journals (Sweden)

    Sarah E Murray

    2014-03-01

    Full Text Available This paper discusses three potential varieties of update: updates to the common ground, structuring updates, and updates that introduce discourse referents. These different types of update are used to model different aspects of natural language phenomena. Not-at-issue information directly updates the common ground. The illocutionary mood of a sentence structures the context. Other updates introduce discourse referents of various types, including propositional discourse referents for at-issue information. Distinguishing these types of update allows a unified treatment of a broad range of phenomena, including the grammatical evidentials found in Cheyenne (Algonquian as well as English evidential parentheticals, appositives, and mood marking. An update semantics that can formalize all of these varieties of update is given, integrating the different kinds of semantic contributions into a single representation of meaning. http://dx.doi.org/10.3765/sp.7.2 BibTeX info

  5. Simulations

    CERN Document Server

    Ngada, N M

    2015-01-01

    The complexity and cost of building and running high-power electrical systems make the use of simulations unavoidable. The simulations available today provide great understanding about how systems really operate. This paper helps the reader to gain an insight into simulation in the field of power converters for particle accelerators. Starting with the definition and basic principles of simulation, two simulation types, as well as their leading tools, are presented: analog and numerical simulations. Some practical applications of each simulation type are also considered. The final conclusion then summarizes the main important items to keep in mind before opting for a simulation tool or before performing a simulation.

  6. MEMS Stirling Cooler Development Update

    Science.gov (United States)

    Moran, Matthew E.; Wesolek, Danielle

    2003-01-01

    This presentation provides an update on the effort to build and test a prototype unit of the patented MEMS Stirling cooler concept. A micro-scale regenerator has been fabricated by Polar Thermal Technologies and is currently being integrated into a Stirling cycle simulator at Johns Hopkins University Applied Physics Laboratory. A discussion of the analysis, design, assembly, and test plans for the prototype will be presented.

  7. Breast Cancer Research Update

    Science.gov (United States)

    ... JavaScript on. Feature: Breast Cancer Breast Cancer Research Update Winter 2017 Table of Contents National Cancer Institute ... Addressing Breast Cancer's Unequal Burden / Breast Cancer Research Update Winter 2017 Issue: Volume 11 Number 4 Page ...

  8. 热载流子效应对GaAs光电导天线仿真的DD模型修正%DD Model Updating for Hot-carrier Effects on the Simulation Study of GaAs Photoconductive Antenna

    Institute of Scientific and Technical Information of China (English)

    张李伟; 尚丽平; 唐金龙; 夏祖学; 邓琥

    2013-01-01

    研究了光电导天线辐射产生的太赫兹电场强度与外加偏置电场的关系.利用太赫兹时域光谱系统对34μm孔径GaAs偶极子光电导天线进行了测量,得到了外加16.2 kV/cm电场时,辐射太赫兹电场趋于饱和.理论分析了热载流子效应是使光电导天线辐射太赫兹电场趋于饱和的主要原因.同时用热载流子效应修正的扩散-漂移模型结合时域有限差分方法对该天线进行了仿真,仿真与实测数据吻合,表明:考虑飞秒激光照射强场条件下GaAs材料,修正的扩散-漂移模型热载流子效应对漂移速度的影响能准确仿真偏置电场与光电导天线辐射场强的关系.%The relationship between photoconductive antenna terahertz electric-field strength and the applied bias-electric field was studied. Hot-carrier effects were the main reasons to make the photoconductive antenna radiation terahertz electric-field into saturation, while applied 16. 2 kV/cm of bias-electric field. 34 μm aperture GaAs dipole photoconductive antenna was simulated. The simulation method was diffusion-drift model updating for hot-carrier effects combined with the finite difference time domain (FDTD) method. Terahertz time domain spectroscopy system (THz -TDS) was used to measure this photoconductive antenna as well. The simulation data was agreed with the measurement data very well. When applied bias-field increased to about 16.2 kV/cm, the photoconductive antenna terahertz radiation electric-field reached into saturation. The results show that, considered GaAs material under the strong field of the femtosecond laser irradiation conditions, the diffusion-drift updating model for hot-carrier effects on the drift velocity can accurately reflect the relationship between bias electric and photoconductive antenna radiated field strength.

  9. An updated numerical simulation of the ground-water flow system for the Castle Lake debris dam, Mount St. Helens, Washington, and implications for dam stability against heave

    Science.gov (United States)

    Roeloffs, Evelyn A.

    1994-01-01

    A numerical simulation of the ground-water flow system in the Castle Lake debris dam, calibrated to data from the 1991 and 1992 water years, was used to estimate factors of safety against heave and internal erosion. The Castle Lake debris dam, 5 miles northwest of the summit of Mount St. Helens, impounds 19,000 acre-ft of water that could pose a flood hazard in the event of a lake breakout. A new topographic map of the Castle Lake area prior to the 1980 eruption of Mount St. Helens was prepared and used to calculate the thickness of the debris avalanche deposits that compose the dam. Water levels in 22 piezometers and discharges from seeps on the dam face measured several times per year beginning in 1990 supplemented measurements in 11 piezometers and less frequent seep discharge measurements made since 1983. Observations in one group of piezometers reveal heads above the land surface and head gradients favoring upward flow that correspond to factors of safety only slightly greater than 2. The steady-state ground-water flow system in the debris dam was simulated using a threedimensional finite difference computer program. A uniform, isotropic model having the same shape as the dam and a hydraulic conductivity of 1.55 ft/day simulates the correct water level at half the observation points, but is in error by 10 ft or more at other points. Spatial variations of hydraulic conductivity were required to calibrate the model. The model analysis suggests that ground water flows in both directions between the debris dam and Castle Lake. Factors of safety against heave and internal erosion were calculated where the model simulated upward flow of ground water. A critical gradient analysis yields factors of safety as low as 2 near the piezometers where water level observations indicate low factors of safety. Low safety factors are also computed near Castle Creek where slumping was caused by a storm in January, 1990. If hydraulic property contrasts are present in areas of the

  10. Country Update: Israel 2005

    Science.gov (United States)

    Marar, Marianne Maurice

    2005-01-01

    Country Updates is a new section of "Intercultural Education." Starting in "Intercultural Education," Volume 16 No. 5, this column will focus on recent developments during the last two to three years in the field of intercultural education in one particular country. These updates can include recent policy decisions, the main…

  11. Simulation

    DEFF Research Database (Denmark)

    Gould, Derek A; Chalmers, Nicholas; Johnson, Sheena J

    2012-01-01

    Recognition of the many limitations of traditional apprenticeship training is driving new approaches to learning medical procedural skills. Among simulation technologies and methods available today, computer-based systems are topical and bring the benefits of automated, repeatable, and reliable p...... performance assessments. Human factors research is central to simulator model development that is relevant to real-world imaging-guided interventional tasks and to the credentialing programs in which it would be used.......Recognition of the many limitations of traditional apprenticeship training is driving new approaches to learning medical procedural skills. Among simulation technologies and methods available today, computer-based systems are topical and bring the benefits of automated, repeatable, and reliable...

  12. Simulation

    CERN Document Server

    Ross, Sheldon

    2006-01-01

    Ross's Simulation, Fourth Edition introduces aspiring and practicing actuaries, engineers, computer scientists and others to the practical aspects of constructing computerized simulation studies to analyze and interpret real phenomena. Readers learn to apply results of these analyses to problems in a wide variety of fields to obtain effective, accurate solutions and make predictions about future outcomes. This text explains how a computer can be used to generate random numbers, and how to use these random numbers to generate the behavior of a stochastic model over time. It presents the statist

  13. PUMA: The Positional Update and Matching Algorithm

    Science.gov (United States)

    Line, J. L. B.; Webster, R. L.; Pindor, B.; Mitchell, D. A.; Trott, C. M.

    2017-01-01

    We present new software to cross-match low-frequency radio catalogues: the Positional Update and Matching Algorithm. The Positional Update and Matching Algorithm combines a positional Bayesian probabilistic approach with spectral matching criteria, allowing for confusing sources in the matching process. We go on to create a radio sky model using Positional Update and Matching Algorithm based on the Murchison Widefield Array Commissioning Survey, and are able to automatically cross-match 98.5% of sources. Using the characteristics of this sky model, we create simple simulated mock catalogues on which to test the Positional Update and Matching Algorithm, and find that Positional Update and Matching Algorithm can reliably find the correct spectral indices of sources, along with being able to recover ionospheric offsets. Finally, we use this sky model to calibrate and remove foreground sources from simulated interferometric data, generated using OSKAR (the Oxford University visibility generator). We demonstrate that there is a substantial improvement in foreground source removal when using higher frequency and higher resolution source positions, even when correcting positions by an average of 0.3 arcmin given a synthesised beam-width of 2.3 arcmin.

  14. Simulation of colloidal fouling by coupling a dynamically updating velocity profile and electric field interactions with Force Bias Monte Carlo methods for membrane filtration.

    Science.gov (United States)

    Boyle, Paul M; Houchens, Brent C; Kim, Albert S

    2013-06-01

    Pressure-driven flow through a channel with membrane walls is modeled for high particulate volume fractions of 10%. Particle transport is influenced by Brownian diffusion, shear-induced diffusion, and convection due to the axial crossflow. The particles are also subject to electrostatic double layer repulsion and van der Waals attraction, from both particle-particle and particle-membrane interactions. Force Bias Monte Carlo (FBMC) simulations predict the deposition of the particles onto the membranes, where both hydrodynamics and the change in particle potentials determine the probability that a proposed move is accepted. The particle volume fraction is used to determine an apparent local viscosity observed by the continuum flow. As particles migrate, the crossflow velocity field evolves in quasi-steady fashion with each time instance appearing fully developed in the downstream direction. Particles subject to combined hydrodynamic and electric effects (electrostatic double layer repulsion and van der Waals attraction) reach a more stable steady-state as compared to systems with only hydrodynamic effects considered. As expected, at higher crossflow Reynolds numbers more particles remain in the crossflow free stream.

  15. Assessment of stochastically updated finite element models using reliability indicator

    Science.gov (United States)

    Hua, X. G.; Wen, Q.; Ni, Y. Q.; Chen, Z. Q.

    2017-01-01

    Finite element (FE) model updating techniques have been a viable approach to correcting an initial mathematical model based on test data. Validation of the updated FE models is usually conducted by comparing model predictions with independent test data that have not been used for model updating. This approach of model validation cannot be readily applied in the case of a stochastically updated FE model. In recognizing that structural reliability is a major decision factor throughout the lifecycle of a structure, this study investigates the use of structural reliability as a measure for assessing the quality of stochastically updated FE models. A recently developed perturbation method for stochastic FE model updating is first applied to attain the stochastically updated models by using the measured modal parameters with uncertainty. The reliability index and failure probability for predefined limit states are computed for the initial and the stochastically updated models, respectively, and are compared with those obtained from the 'true' model to assess the quality of the two models. Numerical simulation of a truss bridge is provided as an example. The simulated modal parameters involving different uncertainty magnitudes are used to update an initial model of the bridge. It is shown that the reliability index obtained from the updated model is much closer to true reliability index than that obtained from the initial model in the case of small uncertainty magnitude; in the case of large uncertainty magnitude, the reliability index computed from the initial model rather than from the updated model is closer to the true value. The present study confirms the usefulness of measurement-calibrated FE models and at the same time also highlights the importance of the uncertainty reduction in test data for reliable model updating and reliability evaluation.

  16. Globally coupled maps with asynchronous updating

    CERN Document Server

    Abramson, G; Abramson, Guillermo; Zanette, Damian H.

    1998-01-01

    We analyze a system of globally coupled logistic maps with asynchronous updating. We show that its dynamics differs considerably from that of the synchronous case. For growing values of the coupling intensity, an inverse bifurcation cascade replaces the structure of clusters and ordering in the phase diagram. We present numerical simulations and an analytical description based on an effective single-element dynamics affected by internal fluctuations. Both of them show how global coupling is able to suppress the complexity of the single-element evolution. We find that, in contrast to systems with synchronous update, internal fluctuations satisfy the law of large numbers.

  17. ACS Updates Environmental Report.

    Science.gov (United States)

    Chemical and Engineering News, 1978

    1978-01-01

    Describes a new publication of a report prepared by the American Chemical Society's Committee on Environmental Improvement. This is a new version that updates a 1969 report and contains additional material and expanded recommendations. (GA)

  18. Veterinary medicines update.

    Science.gov (United States)

    2017-03-11

    The following information has been produced for Veterinary Record by the Veterinary Medicines Directorate (VMD) to provide an update for veterinary surgeons on recent changes to marketing authorisations for veterinary medicines in the UK and on other relevant issues.

  19. ACS Updates Environmental Report.

    Science.gov (United States)

    Chemical and Engineering News, 1978

    1978-01-01

    Describes a new publication of a report prepared by the American Chemical Society's Committee on Environmental Improvement. This is a new version that updates a 1969 report and contains additional material and expanded recommendations. (GA)

  20. Updated Core Libraries of the ALPS Project

    CERN Document Server

    Gaenko, A; Carcassi, G; Chen, T; Chen, X; Dong, Q; Gamper, L; Gukelberger, J; Igarashi, R; Iskakov, S; Könz, M; LeBlanc, J P F; Levy, R; Ma, P N; Paki, J E; Shinaoka, H; Todo, S; Troyer, M; Gull, E

    2016-01-01

    The open source ALPS (Algorithms and Libraries for Physics Simulations) project provides a collection of physics libraries and applications, with a focus on simulations of lattice models and strongly correlated systems. The libraries provide a convenient set of well-documented and reusable components for developing condensed matter physics simulation code, and the applications strive to make commonly used and proven computational algorithms available to a non-expert community. In this paper we present an updated and refactored version of the core ALPS libraries geared at the computational physics software development community, rewritten with focus on documentation, ease of installation, and software maintainability.

  1. GPGPU for orbital function evaluation with a new updating scheme.

    Science.gov (United States)

    Uejima, Yutaka; Maezono, Ryo

    2013-01-15

    We have accelerated an ab initio quantum Monte Carlo electronic structure calculation using general purpose computing on graphical processing units (GPGPU). The part of the code causing the bottleneck for extended systems is replaced by Compute Unified Device Architecture-GPGPU subroutine kernels which build up spline basis set expansions of electronic orbital functions at each Monte Carlo step. We have achieved a speedup of a factor of 30 for the bottleneck for a simulation of solid TiO(2) with 1536 electrons. To improve the performance with GPGPU we propose a new updating scheme for Monte Carlo sampling, quasi-simultaneous updating, which is intermediate between configuration-by-configuration updating and the widely used particle-by-particle updating. The error in the energy due to by the single precision treatment and the new updating scheme is found to be within the required accuracy of ~10(-3) hartree per primitive cell.

  2. Two-step measurement update for extended Kalman filtering

    Institute of Scientific and Technical Information of China (English)

    Zhang Yong'an; Zhou Di; Duan Guangren

    2005-01-01

    The nonlinear filtering for a class of discrete-time stochastic dynamic systems whose measurement equations contain linear (or universal linearizable) components and nonlinear components which are mutually statistical independent is investigated. A two-step measurement update is proposed for the filtering of the systems. The first-step update is a linear (or universal linearization) measurement correction which introduces an intermediate estimate, while the second-step nonlinear linearization update produces the final posterior estimate based on the first-step estimate.Since the first measurement correction is a linear or universal linearization update, it provides an accurate linearization reference point for the second nonlinear measurement update. Two simulation examples show superiority of the new estimation method.

  3. Update of European bioethics

    DEFF Research Database (Denmark)

    Rendtorff, Jacob Dahl

    2015-01-01

    This paper presents an update of the research on European bioethics undertaken by the author together with Professor Peter Kemp since the 1990s, on Basic ethical principles in European bioethics and biolaw. In this European approach to basic ethical principles in bioethics and biolaw, the princip......This paper presents an update of the research on European bioethics undertaken by the author together with Professor Peter Kemp since the 1990s, on Basic ethical principles in European bioethics and biolaw. In this European approach to basic ethical principles in bioethics and biolaw......, the principles of autonomy, dignity, integrity and vulnerability are proposed as the most important ethical principles for respect for the human person in biomedical and biotechnological development. This approach to bioethics and biolaw is presented here in a short updated version that integrates the earlier...

  4. Multiple Sclerosis: An Update.

    Science.gov (United States)

    Faguy, Kathryn

    2016-05-01

    Multiple sclerosis (MS) is the most common disabling neurologic condition in young adults and imposes high financial and quality of life costs on patients, their families, and society. Yet, developments in the battle against MS include new treatments to slow its progression and updated diagnostic criteria that can accelerate diagnosis and effective treatment. This article offers a review and update on the disease, focusing on risk factors and possible causes, symptoms, forms of MS, diagnostic criteria and tools, and the expanding array of approved treatments. It also reports on the skyrocketing cost of MS drugs, misdiagnosis, and special patient populations with MS.

  5. XLMR genes: update 2000.

    NARCIS (Netherlands)

    Chiurazzi, P.; Hamel, B.C.J.; Neri, G.

    2001-01-01

    This is the sixth edition of the catalogue of XLMR genes, ie X-linked genes whose malfunctioning causes mental retardation. The cloning era is not yet concluded, actually much remains to be done to account for the 202 XLMR conditions listed in this update. Many of these may eventually prove to be du

  6. Updating Older Fume Hoods.

    Science.gov (United States)

    Saunders, G. Thomas

    1985-01-01

    Provides information on updating older fume hoods. Areas addressed include: (1) adjustment of the hood's back baffle; (2) hood air leakage; (3) light level; (4) hood location in relation to room traffic and room air; and (5) establishing and maintaining hood performance. (JN)

  7. Update of telephone exchange

    CERN Multimedia

    2006-01-01

    As part of the upgrade of telephone services, the CERN switching centre will be updated on between Monday 23 October 8.00 p.m. and Tuesday 24 October 2.00 a.m. Telephone services may be disrupted and possibly even interrupted during this operation. We apologise in advance for any inconvenience this may cause. CERN TELECOM Service

  8. Update of telephone exchange

    CERN Multimedia

    2006-01-01

    As part of the upgrade of telephone services, the CERN switching centre will be updated on Monday 3 July between 8.00 p.m. and 3.00 a.m. Telephone services may be disrupted and possibly even interrupted during this operation. We apologise in advance for any inconvenience this may cause. CERN TELECOM Service

  9. Update of telephone exchange

    CERN Multimedia

    2006-01-01

    As part of the upgrade of telephone services, the CERN switching centre will be updated on Wednesday 14 June between 8.00 p.m. and midnight. Telephone services may be disrupted and possibly even interrupted during this operation. We apologise in advance for any inconvenience this may cause. CERN TELECOM Service

  10. Update of telephone exchange

    CERN Multimedia

    2006-01-01

    As part of the upgrade of telephone services, the CERN switching centre will be updated on Monday 3 July between 8.00 p.m. and 3.00 a.m. Telephone services may be disrupted and possibly even interrupted during this operation.We apologise in advance for any inconvenience this may cause. CERN TELECOM Service

  11. Sugammadex: An Update

    Directory of Open Access Journals (Sweden)

    Ezri Tiberiu

    2016-01-01

    Full Text Available The purpose of this update is to provide recent knowledge and debates regarding the use of sugammadex in the fields of anesthesia and critical care. The review is not intended to provide a comprehensive description of sugammadex and its clinical use.

  12. NXE pellicle: development update

    Science.gov (United States)

    Brouns, Derk; Bendiksen, Aage; Broman, Par; Casimiri, Eric; Colsters, Paul; de Graaf, Dennis; Harrold, Hilary; Hennus, Piet; Janssen, Paul; Kramer, Ronald; Kruizinga, Matthias; Kuntzel, Henk; Lafarre, Raymond; Mancuso, Andrea; Ockwell, David; Smith, Daniel; van de Weg, David; Wiley, Jim

    2016-09-01

    ASML introduced the NXE pellicle concept, a removable pellicle solution that is compatible with current and future patterned mask inspection methods. We will present results of how we have taken the idea from concept to a demonstrated solution enabling the use of EUV pellicle by the industry for high volume manufacturing. We will update on the development of the next generation of pellicle films with higher power capability. Further, we will provide an update on top level requirements for pellicles and external interface requirements needed to support NXE pellicle adoption at a mask shop. Finally, we will present ASML's pellicle handling equipment to enable pellicle use at mask shops and our NXE pellicle roadmap outlining future improvements.

  13. Recycling, Canadian update

    Energy Technology Data Exchange (ETDEWEB)

    Lakshmanan, V. I. [Process Research ORTECH Inc., Mississauga, ON (Canada); Shaw, L. [Canadian Association of Recycling Industries, Almonte, ON (Canada)

    2001-07-01

    An update on the recycling industry in Canada is provided by way of selected examples involving the recovery of gallium from electronic scrap, magnesium recovery from mine tailings and energy recovery from metal industry processes. These examples have been selected to illustrate the synergy between major mining, metallurgical and utility industries with end users in the building materials, automotive and electronic industries. 1 tab., 1 fig.

  14. Annual Pension Fund Update

    CERN Multimedia

    Pension Fund

    2011-01-01

    All members and beneficiaries of the Pension Fund are invited to attend the Annual Pension Fund Update to be held in the CERN Council Chamber on Tuesday 20 September 2011 from 10-00 to 12-00 a.m. Copies of the 2010 Financial Statements are available from departmental secretariats. Coffee and croissants will be served prior to the meeting as of 9-30 a.m.

  15. Space shuttle engineering and operations support: Study of the effects of multiple ground updates on the accuracy of the onboard state vector with IMU only navigation

    Science.gov (United States)

    Killen, R.

    1977-01-01

    There are six cases considered: (1) no updates made during the flight, (2) one ground update in the vertical components only at the first practice separation minus 15 minutes, (3) one ground update in all components at the first practice separation minus 5 minutes, (4) updates 2 and 3 applied successively, (5) Case 4 plus an update in all components at the second separation attempt minus 3 minutes, and (6) one ground update at first separation attempt minus 5 minutes and a second update at second separation minus two minutes. The mission control simulation program, GROPER, was run using as radar input a tape containing radar derived state vectors for the trajectory.

  16. How Documentalists Update SIMBAD

    Science.gov (United States)

    Buga, M.; Bot, C.; Brouty, M.; Bruneau, C.; Brunet, C.; Cambresy, L.; Eisele, A.; Genova, F.; Lesteven, S.; Loup, C.; Neuville, M.; Oberto, A.; Ochsenbein, F.; Perret, E.; Siebert, A.; Son, E.; Vannier, P.; Vollmer, B.; Vonflie, P.; Wenger, M.; Woelfel, F.

    2015-04-01

    The Strasbourg astronomical Data Center (CDS) was created in 1972 and has had a major role in astronomy for more than forty years. CDS develops a service called SIMBAD that provides basic data, cross-identifications, bibliography, and measurements for astronomical objects outside the solar system. It brings to the scientific community an added value to content which is updated daily by a team of documentalists working together in close collaboration with astronomers and IT specialists. We explain how the CDS staff updates SIMBAD with object citations in the main astronomical journals, as well as with astronomical data and measurements. We also explain how the identification is made between the objects found in the literature and those already existing in SIMBAD. We show the steps followed by the documentalist team to update the database using different tools developed at CDS, like the sky visualizer Aladin, and the large catalogues and survey database VizieR. As a direct result of this teamwork, SIMBAD integrates almost 10.000 bibliographic references per year. The service receives more than 400.000 queries per day.

  17. Effect of display update interval, update type, and background on perception of aircraft separation on a cockpit display on traffic information

    Science.gov (United States)

    Jago, S.; Baty, D.; Oconnor, S.; Palmer, E.

    1981-01-01

    The concept of a cockpit display of traffic information (CDTI) includes the integration of air traffic, navigation, and other pertinent information in a single electronic display in the cockpit. Concise display symbology was developed for use in later full-mission simulator evaluations of the CDTI concept. Experimental variables used included the update interval motion of the aircraft, the update type, (that is, whether the two aircraft were updated at the same update interval or not), the background (grid pattern or no background), and encounter type (straight or curved). Only the type of encounter affected performance.

  18. CNGS: Update on secondary beam layout.

    CERN Document Server

    Ball, A E; Falaleev, V P; Grant, A L; Guglielmi, A M; Maire, G; Maugain, J M; Meddahi, M; Palladino, V; Pietropaolo, F; Rangod, Stephane; Sala, P; Vassilopoulos, N; Vincke, H H; CERN. Geneva. SPS and LEP Division

    2000-01-01

    The conceptual technical design of the CNGS (CERN neutrino beam to Gran Sasso) facility has been presented in the report CERN 98-02 / INFN-AE/98-05. An updated beam design, in particular a revised neutrino beam optimised for nu_mu - nu_tau appearance experiments, has been described in an addendum (CERN-SL/99-034(DI) / INFN-AE/99-05). In this note, a slightly modified version of the CNGS secondary beam and an update of the parameter lists is given. The changes aim at technical improvements in the CNGS secondary beam components, without compromising on the expected lifetime of the components. A slight increase of expected nu_tau charged current events at Gran Sasso has been achieved in the simulations.

  19. Integration of a Star Tracker and Inertial Sensors Using an Attitude Update

    Science.gov (United States)

    2014-09-18

    GPS, star tracker, and barometer . GPS measurements are used to update the INS position and velocity for a small duration in the beginning of the...vehicle’s flight time. Star tracker and barometer measurements are used to update the INS attitude and altitude, respectively. This research uses a...and barometer bias) using the three types of measurement updates. The simulation results show that the star tracker was able to improve the performance

  20. GPGPU for orbital function evaluation with a new updating scheme

    CERN Document Server

    Uejima, Yutaka

    2012-01-01

    We accelerated an {\\it ab-initio} QMC electronic structure calculation by using GPGPU. The bottleneck of the calculation for extended solid systems is replaced by CUDA-GPGPU subroutine kernels which build up spline basis set expansions of electronic orbital functions at each Monte Carlo step. We achieved 30.8 times faster evaluation for the bottleneck, confirmed on the simulation of TiO$_2$ solid with 1,536 electrons. To achieve better performance in GPGPU we propose a new updating scheme for Monte Carlo sampling, quasi-simultaneous updating, which is in between the configuration-by-configuration updating and the widely-used particle-by-particle one. The energy deviation caused both by the single precision treatment and the new updating scheme is found to be within the accuracy required in the calculation, $\\sim 10^{-3}$ hartree per primitive cell.

  1. Cohort Profile Update

    DEFF Research Database (Denmark)

    Omland, Lars Haukali; Ahlström, Magnus Glindvad; Obel, Niels

    2014-01-01

    The DHCS is a cohort of all HIV-infected individuals seen in one of the eight Danish HIV centres after 31 December 1994. Here we update the 2009 cohort profile emphasizing the development of the cohort. Every 12-24 months, DHCS is linked with the Danish Civil Registration System (CRS) in order...... of Causes of Death, the Danish National Prescription Registry, the Attainment Register and the Integrated Database for Labour Market Research to get information on vital status, migration, cancer, hospital contacts, causes of death, dispensed prescriptions, education and employment. Using this design, rates...

  2. Context updates are hierarchical

    Directory of Open Access Journals (Sweden)

    Anton Karl Ingason

    2016-10-01

    Full Text Available This squib studies the order in which elements are added to the shared context of interlocutors in a conversation. It focuses on context updates within one hierarchical structure and argues that structurally higher elements are entered into the context before lower elements, even if the structurally higher elements are pronounced after the lower elements. The crucial data are drawn from a comparison of relative clauses in two head-initial languages, English and Icelandic, and two head-final languages, Korean and Japanese. The findings have consequences for any theory of a dynamic semantics.

  3. Updates in pediatric endocrinology.

    Science.gov (United States)

    Kamboj, Manmohan K

    2013-04-01

    There are rapid advances being made in the field of medicine! New research continues to investigate etiopathogenic mechanisms underlying many endocrine disorders, new tests to facilitate diagnosis, and newer treatment options. The discussion in this article focuses on a few of the important concerns in adolescent endocrinology and highlights some recent concepts that are important for the physicians taking care of these adolescents. This article also includes a brief update on diabetes mellitus types 1 and 2, obesity, and polycystic ovarian syndrome; new thoughts and controversies about vitamin D and current management of the common thyroid disorders; adrenal insufficiency; and concerns with disorders of puberty in adolescents.

  4. Lodging Update: Greater Boston

    Directory of Open Access Journals (Sweden)

    Rachel Roginsky

    2012-09-01

    Full Text Available Pinnacle Advisory Group provides an update of lodging industry performance in New England and Boston for the first half of 2012. While the New England region outpaced the nation, the specific story varies from state to state. Only Massachusetts and Vermont achieved REVPAR performance better than the national average. A review of the Greater Boston lodging market reveals that a healthy local economy and strong convention calendar, combined with a number of one-time events and limited new supply, boosted the local market in 2012. The outlook for 2013 in Greater Boston remains positive, with expectations of a 4.7% growth in REVPAR.

  5. Craniosynostosis update 1987.

    Science.gov (United States)

    Cohen, M M

    1988-01-01

    Information on craniosynostosis in this paper updates "Craniosynostosis: Diagnosis, Evaluation, and Management" (Cohen MM Jr: New York: Raven Press, 1986). It also discusses recent developments that were included in the book but need further explanation or emphasis. Subjects discussed are: epidemiology, etiology, sutural biology, growth and development, neurological and psychosocial aspects, surgery, cloverleaf skulls, craniosynostosis syndromes, and prenatal diagnosis. Under the subject of etiology, fetal head constraint, maternal thyroid disease, calcified cephalohematoma, teratogens, and delayed suture closure and Wormian bones are considered. An updating of 15 cloverleaf skull conditions includes four monogenic disorders, two chromosomal disorders, one disruption, one iatrogenic condition, and seven syndromes of unknown cause. Newly recognized disorders with cloverleaf skull include Beare-Stevenson cutis gyratum syndrome and Say-Poznanski syndrome. Craniosynostosis syndromes and associations discussed include acrocraniofacial dysostosis, Apert syndrome, Beare-Stevenson cutis gyratum syndrome, Calabro syndrome, calvarial hyperostosis, chromosomal craniostenosis, Cole-Carpenter type osteogenesis imperfecta, Crouzon syndrome, Curry-Jones syndrome, Curry variant of Carpenter syndrome, cutis aplasia and cranial stenosis, Fontaine-Farriaux syndrome, Gomex-López-Hernández syndrome, Hersh syndrome, hyper-IgE syndrome and craniostenosis, hypomandibular faciocranial dysostosis, Marfanoid features and craniostenosis, Pfeiffer-type cardiocranial syndrome, Pfeiffer-type dolichocephalosyndactyly, and Say-Barber syndrome.

  6. Titan's gravity: An update

    Science.gov (United States)

    Durante, D.; Iess, L.; Racioppa, P.; Armstrong, J. W.; Lunine, J. I.; Stevenson, D. J.; Tortora, P.

    2016-12-01

    Since its arrival at Saturn in 2004, Cassini performed nine flybys devoted to the determination of Titan's gravity field and its tidal variations. The last gravity flyby of the mission (T122) took place on Aug. 10, 2016. We will present an updated gravity solution, based on all available data. These include also an additional flyby (T110, March 2015, primarily devoted to the imaging Titan's north polar lakes) carried out with the low gain antenna. This flyby was particularly valuable because closest approach occurred at high latitude (75°N), over an area not previously sampled. Published gravity results (Iess et al., 2012) indicated that Titan is subject to large eccentricity tides in response to Saturn's time varying forcing field. The magnitude of the response quadrupole field, controlled by the Love number k2, was used to infer the existence of an internal ocean. The new gravity field determination provides a better estimate of k2, to a level of a few percent. In addition to a full 3x3 field, the new solution includes also higher degree and order harmonic coefficients (such as J4) and offers an improved map of gravity anomalies. The updated geoid and its associated uncertainty could be used to refine the gravity-altimetry correlative analysis and for improved interpretation of radar altimetric data.

  7. Working Memory Updating Latency Reflects the Cost of Switching between Maintenance and Updating Modes of Operation

    Science.gov (United States)

    Kessler, Yoav; Oberauer, Klaus

    2014-01-01

    Updating and maintenance of information are 2 conflicting demands on working memory (WM). We examined the time required to update WM (updating latency) as a function of the sequence of updated and not-updated items within a list. Participants held a list of items in WM and updated a variable subset of them in each trial. Four experiments that vary…

  8. Importance of land use update during the calibration period and simulation of water balance response to land use change in the upper Rio das Mortes Catchment (Cerrado Biome, Central-Western Brazil)

    Science.gov (United States)

    Lamparter, Gabriele; Kovacs, Kristof; Nobrega, Rodolfo; Gerold, Gerhard

    2015-04-01

    Changes in the hydrological balance and following degradation of the water ecosystem services due to large scale land use changes are reported from agricultural frontiers all over the world. Traditionally, hydrological models including vegetation and land use as a part of the hydrological cycle use a fixed distribution of land use for the calibration period. We believe that a meaningful calibration - especially when investigating the effects of land use change on hydrology - demands the inclusion of land use change during the calibration period into the calibration procedure. The SWAT (Soil and Water Assessment Tool) model is a process-based, semi-distributed model calculating the different components of the water balance. The model bases on the definition of hydrological response units (HRUs) which are based on soil, vegetation and slope distribution. It specifically emphasises the role of land use and land management on the water balance. The Central-Western region of Brazil is one of the leading agricultural frontiers, which experienced rapid and radical deforestation and agricultural intensification in the last 40 years (from natural Cerrado savannah to cattle grazing to intensive corn and soya cropland). The land use history of the upper Rio das Mortes catchment (with 17500 km²) is reasonably well documented since the 1970th. At the same time there are almost continuous climate and runoff data available for the period between 1988 and 2011. Therefore, the work presented here shows the model calibration and validation of the SWAT model with the land use update function for three different periods (1988 to 1998, 1998 to 2007 and 2007 to 2011) in comparison with the same calibration periods using a steady state land use distribution. The use of the land use update function allows a clearer identification which changes in the discharge are due to climatic variability and which are due to changes in the vegetation cover. With land use update included into the

  9. Memory updating and mental arithmetic

    Directory of Open Access Journals (Sweden)

    Cheng-Ching eHan

    2016-02-01

    Full Text Available Is domain-general memory updating ability predictive of calculation skills or are such skills better predicted by the capacity for updating specifically numerical information? Here, we used multidigit mental multiplication (MMM as a measure for calculating skill as this operation requires the accurate maintenance and updating of information in addition to skills needed for arithmetic more generally. In Experiment 1, we found that only individual differences with regard to a task updating numerical information following addition (MUcalc could predict the performance of MMM, perhaps owing to common elements between the task and MMM. In Experiment 2, new updating tasks were designed to clarify this: a spatial updating task with no numbers, a numerical task with no calculation, and a word task. The results showed that both MUcalc and the spatial task were able to predict the performance of MMM but only with the more difficult problems, while other updating tasks did not predict performance. It is concluded that relevant processes involved in updating the contents of working memory support mental arithmetic in adults.

  10. Adjustment or updating of models

    Indian Academy of Sciences (India)

    D J Ewins

    2000-06-01

    In this paper, first a review of the terminology used in the model adjustment or updating is presented. This is followed by an outline of the major updating algorithms cuurently available, together with a discussion of the advantages and disadvantages of each, and the current state-of-the-art of this important application and part of optimum design technology.

  11. Empirical testing of forecast update procedure forseasonal products

    DEFF Research Database (Denmark)

    Wong, Chee Yew; Johansen, John

    2008-01-01

    of a toy supply chain. The theoretical simulation involves historical weekly consumer demand data for 122 toy products. The empirical test is then carried out in real-time with 291 toy products. The results show that the proposed forecast updating procedure: 1) reduced forecast errors of the annual...

  12. Improving Mantel-Haenszel DIF Estimation through Bayesian Updating

    Science.gov (United States)

    Zwick, Rebecca; Ye, Lei; Isham, Steven

    2012-01-01

    This study demonstrates how the stability of Mantel-Haenszel (MH) DIF (differential item functioning) methods can be improved by integrating information across multiple test administrations using Bayesian updating (BU). The authors conducted a simulation that showed that this approach, which is based on earlier work by Zwick, Thayer, and Lewis,…

  13. Updates in ophthalmic pathology.

    Science.gov (United States)

    Mendoza, Pia R; Grossniklaus, Hans E

    2017-05-01

    Ophthalmic pathology has a long history and rich heritage in the field of ophthalmology. This review article highlights updates in ophthalmic pathology that have developed significantly through the years because of the efforts of committed individuals and the confluence of technology such as molecular biology and digital pathology. This is an exciting period in the history of ocular pathology, with cutting-edge techniques paving the way for new developments in diagnostics, therapeutics, and research. Collaborations between ocular oncologists and pathologists allow for improved and comprehensive patient care. Ophthalmic pathology continues to be a relevant specialty that is important in the understanding and clinical management of ocular disease, education of eye care providers, and overall advancement of the field.

  14. Amblyopia update: new treatments.

    Science.gov (United States)

    Vagge, Aldo; Nelson, Leonard B

    2016-09-01

    This review article is an update on the current treatments for amblyopia. In particular, the authors focus on the concepts of brain plasticity and their implications for novel treatment strategies for both children and adults affected by amblyopia. A variety of strategies has been developed to treat amblyopia in children and adults. New evidence on the pathogenesis of amblyopia has been obtained both in animal models and in clinical trials. Mainly, these studies have challenged the classical concept that amblyopia becomes untreatable after the 'end' of the sensitive or critical period of visual development, because of a lack of sufficient plasticity in the adult brain. New treatments for amblyopia in children and adults are desirable and should be encouraged. However, further studies should be completed before such therapies are widely accepted into clinical practice.

  15. Update on Parkinson disease.

    Science.gov (United States)

    Siderowf, Andrew; Stern, Matthew

    2003-04-15

    This Update reviews developments in the pathophysiology and treatment of Parkinson disease during the past several years. In the area of pathophysiology, studies have addressed the contribution of environmental factors such as caffeine and pesticides. Large-scale epidemiologic studies have also expanded the role genetic factors are thought to play. Detailed studies of kindreds with familial Parkinson disease due to alpha-synuclein and parkin have catalyzed basic science investigations into the pathologic mechanisms of the disease. These studies have led to the development of a pathophysiologic model of Parkinson disease that emphasizes abnormal protein aggregation. Studies of treatment have clarified the relative roles of l-dopa and dopamine agonists in early Parkinson disease and shown the potential for surgical interventions, particularly deep-brain stimulation, to relieve the symptoms of advanced, medically refractory disease.

  16. Y2K UPDATE

    CERN Multimedia

    Sverre JARP

    1999-01-01

    Concerning Y2K preparation, please note the following:Everybody, who has a NICE installation on his/her PC, needs to log in to NICE at least once before Xmas to get the Y2K update installed. This applies especially to dual boot systems.The test schedule on Y2Kplus.cern.ch will be prolonged. The last restart took place on 10 November and two more will take place on 24 November and 8 December, respectively. The Oracle users responsible for the maintenance of Oracle Forms applications which include PL/SQL blocks where date fields are handled with the default format are requested to contact oracle.support@cern.ch at their earliest convenience.Sverre Jarp (CERN Y2K co-ordinator, phone: 74944)

  17. ILRS Website Update

    Science.gov (United States)

    Noll, Carey E.; Torrence, Mark H.; Pollack, Nathan H.; Tyahla, Lori J.

    2013-01-01

    The ILRS website, http://ilrs.gsfc.nasa.gov, is the central source of information for all aspects of the service. The website provides information on the organization and operation of the ILRS and descriptions of ILRS components data, and products. Furthermore, the website provides an entry point to the archive of these data products available through the data centers. Links are provided to extensive information on the ILRS network stations including performance assesments and data quality evaluations. Descriptions of suported satellite missions (current, future, and past) are provided to aid in station acquisition and data analysis. The website was reently redesigned. Content was reviewed during the update process, ensuring information is current and useful. This poster will provide specific examples of key sections, applicaitons, and webpages.

  18. Securing Binding Updates in Routing Optimizaton of Mobile IPv6

    Directory of Open Access Journals (Sweden)

    S. Rajkumar

    2012-06-01

    Full Text Available Mobile IPv6 (mipv6 is an internet protocol that allows mobile nodes to have continuous network connectivity to the internet without changing their ip addresses while moving to other networks. The packets sent from Correspondent Node (CN to a Mobile Node (MN go first through the mobile node’s Home Agent (HA. Then the HA tunnels them to the MN’s foreign network. This process of delivering the packets to CN is called triangle routing. Triangle routing problem appears when the indirect path between CN and MN through the HA is longer than the direct path. To overcome triangle routing, Route Optimization (RO method is added in mobile Pv6. In route optimization, when MN changes its location, it sends a Binding Update (BU to CN informing its CoA. To secure these Binding Updates, we present a new protocol called “Certificate Based Inquisition Approach” for securing Binding Updates in RO. Performance analysis of this shows that it is computationally efficient than RR protocol and is not susceptible to any security attacks. To show the effectiveness of the proposed technique, it is compared with the state of art of other RO protocols. Simulation results presented in this study are based on the ns2 mobility software on linux platform. The simulations results show that our proposed technique achieves better performance than the Return Routability (RR, Certificate Based Binding Update protocol (CBU, Hierarchical Certificate Based Binding Update protocol (HCBU.

  19. Update rules and interevent time distributions: slow ordering versus no ordering in the voter model.

    Science.gov (United States)

    Fernández-Gracia, J; Eguíluz, V M; San Miguel, M

    2011-07-01

    We introduce a general methodology of update rules accounting for arbitrary interevent time (IET) distributions in simulations of interacting agents. We consider in particular update rules that depend on the state of the agent, so that the update becomes part of the dynamical model. As an illustration we consider the voter model in fully connected, random, and scale-free networks with an activation probability inversely proportional to the time since the last action, where an action can be an update attempt (an exogenous update) or a change of state (an endogenous update). We find that in the thermodynamic limit, at variance with standard updates and the exogenous update, the system orders slowly for the endogenous update. The approach to the absorbing state is characterized by a power-law decay of the density of interfaces, observing that the mean time to reach the absorbing state might be not well defined. The IET distributions resulting from both update schemes show power-law tails.

  20. Update rules and interevent time distributions: Slow ordering versus no ordering in the voter model

    Science.gov (United States)

    Fernández-Gracia, J.; Eguíluz, V. M.; San Miguel, M.

    2011-07-01

    We introduce a general methodology of update rules accounting for arbitrary interevent time (IET) distributions in simulations of interacting agents. We consider in particular update rules that depend on the state of the agent, so that the update becomes part of the dynamical model. As an illustration we consider the voter model in fully connected, random, and scale-free networks with an activation probability inversely proportional to the time since the last action, where an action can be an update attempt (an exogenous update) or a change of state (an endogenous update). We find that in the thermodynamic limit, at variance with standard updates and the exogenous update, the system orders slowly for the endogenous update. The approach to the absorbing state is characterized by a power-law decay of the density of interfaces, observing that the mean time to reach the absorbing state might be not well defined. The IET distributions resulting from both update schemes show power-law tails.

  1. Update of CERN exchange network

    CERN Multimedia

    2003-01-01

    An update of the CERN exchange network will be done next April. Disturbances or even interruptions of telephony services may occur from 4th to 24th April during evenings from 18:30 to 00:00 but will not exceed more than 4 consecutive hours (see tentative planning below). CERN divisions are invited to avoid any change requests (set-ups, move or removals) of telephones and fax machines from 4th to 25th April. Everything will be done to minimize potential inconveniences which may occur during this update. There will be no loss of telephone functionalities. CERN GSM portable phones won't be affected by this change. Should you need more details, please send us your questions by email to Standard.Telephone@cern.ch. DateChange typeAffected areas April 11 Update of switch in LHC 4 LHC 4 Point April 14 Update of switch in LHC 5 LHC 5 Point April 15 Update of switches in LHC 3 and LHC 2 Points LHC 3 and LHC 2 April 22 Update of switch N4 Meyrin Ouest April 23 Update of switch  N6 Prévessin Site Ap...

  2. Multiplicative updates for the LASSO

    DEFF Research Database (Denmark)

    Mørup, Morten; Clemmensen, Line Katrine Harder

    2007-01-01

    .e. least squares minimization with $L_1$-norm regularization, since the multiplicative updates (MU) can efficiently exploit the structure of the problem traditionally solved using quadratic programming (QP). We derive an algorithm based on MU for the LASSO and compare the performance to Matlabs standard QP......Multiplicative updates have proven useful for non-negativity constrained optimization. Presently, we demonstrate how multiplicative updates also can be used for unconstrained optimization. This is for instance useful when estimating the least absolute shrinkage and selection operator (LASSO), i...

  3. PUMA: The Positional Update and Matching Algorithm

    CERN Document Server

    Line, J L B; Pindor, B; Mitchell, D A; Trott, C M

    2016-01-01

    We present new software to cross-match low-frequency radio catalogues: the Positional Update and Matching Algorithm (PUMA). PUMA combines a positional Bayesian probabilistic approach with spectral matching criteria, allowing for confusing sources in the matching process. We go on to create a radio sky model using PUMA based on the Murchison Widefield Array Commissioning Survey, and are able to automatically cross-match 98.5% of sources. Using the characteristics of this sky model, we create simple simulated mock catalogues on which to test PUMA, and find that PUMA can reliably find the correct spectral indices of sources, along with being able to recover ionospheric offsets. Finally, we use this sky model to calibrate and remove foreground sources from simulated interferometric data, generated using OSKAR (the Oxford University visibility generator). We demonstrate that there is a substantial improvement in foreground source removal when using higher frequency and higher resolution source positions, even when...

  4. Update of the SPS Impedance Model

    CERN Document Server

    Salvant, B; Zannini, C; Arduini, G; Berrig, O; Caspers, F; Grudiev, A; Métral, E; Rumolo, G; Shaposhnikova, E; Zotter, B; Migliorati, M; Spataro, B

    2010-01-01

    The beam coupling impedance of the CERN SPS is expected to be one of the limitations to an intensity upgrade of the LHC complex. In order to be able to reduce the SPS impedance, its main contributors need to be identified. An impedance model for the SPS has been gathered from theoretical calculations, electromagnetic simulations and bench measurements of single SPS elements. The current model accounts for the longitudinal and transverse impedance of the kickers, the horizontal and vertical electrostatic beam position monitors, the RF cavities and the 6.7 km beam pipe. In order to assess the validity of this model, macroparticle simulations of a bunch interacting with this updated SPS impedance model are compared to measurements performed with the SPS beam.

  5. DSN Simulator

    Science.gov (United States)

    Fijany, Amir; Vatan, Farrokh; Barrett, Anthony; James, Mark; Mackey, Ryan; Williams, Colin

    2009-01-01

    The DSN Simulator (wherein DSN signifies NASA's Deep Space Network) is an updated version of the software described in DSN Array Simulator (NPO-44506), Software Tech Briefs (Special supplement to NASA Tech Briefs), Vol. 32, No. 9 (September 2008), page 26. To recapitulate: This software is used for computational modeling of proposed DSN facilities comprising arrays of antennas and transmitting and receiving equipment for microwave communication with spacecraft on interplanetary missions. Such modeling is performed to estimate facility performance, evaluate requirements that govern facility design, and evaluate proposed improvements in hardware and/or software. The software includes a Monte Carlo simulation component that enables rapid generation of key mission-set metrics (e.g., numbers of links, data rates, and data volumes), and statistical distributions thereof as functions of time. The prior version of the software could model only one DSN facility at a time and included hard-coded, unconfigurable metrics. The present updated version is capable of modeling the entire DSN and provides for configurable metrics, making it possible to perform loading analyses for alternative future DSN architectures and mission-set scenarios. The present version also features an improved user interface and interfaces for exchange of data with other DSN software and with a DSN mission model database.

  6. Update in Internal Medicine

    Science.gov (United States)

    López-Jiménez, Francisco; Brito, Máximo; Aude, Y. Wady; Scheinberg, Phillip; Kaplan, Mariana; Dixon, Denise A.; Schneiderman, Neil; Trejo, Jorge F.; López-Salazar, Luis Humberto; Ramírez-Barba, Ector Jaime; Kalil, Roberto; Ortiz, Carmen; Goyos, José; Buenaño, Alvaro; Kottiech, Samer; Lamas, Gervasio A.

    2009-01-01

    More than 500,000 new medical articles are published every year and available time to keep updated is scarcer every day. Nowadays, the task of selecting useful, consistent, and relevant information for clinicians is a priority in many major medical journals. This review has the aim of gathering the results of the most important findings in clinical medicine in the last few years. It is focused on results from randomized clinical trials and well-designed observational research. Findings were included preferentially if they showed solid results, and we avoided as much as possible including only preliminary data, or results that included only non-clinical outcomes. Some of the most relevant findings reported here include the significant benefit of statins in patients with coronary artery disease even with mean cholesterol level. It also provides a substantial review of the most significant trials assessing the effectiveness of IIb/IIIa receptor blockers. In gastroenterology many advances have been made in the H. pylori eradication, and the finding that the cure of H. pylori infection may be followed by gastroesophageal reflux disease. Some new antivirals have shown encouraging results in patients with chronic hepatitis. In the infectious disease arena, the late breaking trials in anti-retroviral disease are discussed, as well as the new trends regarding antibiotic resistance. This review approaches also the role of leukotriene modifiers in the treatment of asthma and discusses the benefit of using methylprednisolone in patients with adult respiratory distress syndrome, among many other advances in internal medicine. PMID:11068074

  7. Advanced Stirling Convertor Update

    Science.gov (United States)

    Wood, J. Gary; Carroll, Cliff; Matejczyk, Dan; Penswick, L. B.; Soendker, E.

    2006-01-01

    This paper reports on the 88 We Advanced Stirling Convertor (ASC) currently being developed under Phase II of a NASA NRA program for possible use in advanced high specific power radioisotope space power systems. An early developmental unit, the Frequency Test Bed (FTB) which was built and tested in Phase I demonstrated 36% efficiency. The ASC-1 currently being developed under Phase II, uses a high temperature heater head to allow for operation at 850 °C and is expected to have an efficiency approaching 40% (based on AC electrical out) at a temperature ratio of 3.1. The final lightweight ASC-2 convertor to be developed in Phase III is expected to have a mass of approximately 1 kg. The implementation of the ASC would allow for much higher specific power radioisotope power systems, requiring significantly less radioisotope fuel than current systems. The first run of the ASC-1 occurred in September 2005, and full temperature operation was achieved in early October 2005. Presented is an update on progress on the ASC program as well as the plans for future development. Also presented are efforts being performed to ensure the ASC has the required long life already demonstrated in free-piston Stirling cryocoolers.

  8. Gearbox Reliability Collaborative Update (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Sheng, S.; Keller, J.; Glinsky, C.

    2013-10-01

    This presentation was given at the Sandia Reliability Workshop in August 2013 and provides information on current statistics, a status update, next steps, and other reliability research and development activities related to the Gearbox Reliability Collaborative.

  9. Email Updates: MedlinePlus

    Science.gov (United States)

    ... of this page: https://medlineplus.gov/listserv.html Email Updates To use the sharing features on this ... view your email history or unsubscribe. Prevent MedlinePlus emails from being marked as "spam" or "junk" To ...

  10. 77 FR 13198 - Product List Update

    Science.gov (United States)

    2012-03-06

    ...] Product List Update AGENCY: Postal Regulatory Commission. ACTION: Final rule. SUMMARY: The Commission is... adopted in a recent Commission order. The referenced policy assumes periodic updates. The updates are... these updates. DATES: Effective Date: March 6, 2012. Applicability Dates: February 23, 2012...

  11. 75 FR 39629 - FOIA Fee Schedule Update

    Science.gov (United States)

    2010-07-12

    ... 1703 FOIA Fee Schedule Update AGENCY: Defense Nuclear Facilities Safety Board. ACTION: Establishment of... Information Act (FOIA) Fee Schedule Update pursuant to 10 CFR 1703.107(b)(6) of the Board's regulations. DATES... update the FOIA Fee Schedule once every 12 months. The previous Fee Schedule Update was published in...

  12. Communication technology update and fundamentals

    CERN Document Server

    Grant, August E

    2008-01-01

    New communication technologies are being introduced at an astonishing rate. Making sense of these technologies is increasingly difficult. Communication Technology Update is the single best source for the latest developments, trends, and issues in communication technology. Now in its 11th edition, Communication Technology Update has become an indispensable information resource for business, government, and academia. As always, every chapter has been completely rewritten to reflect the latest developments and market statistics, and now covers mobile computing, dig

  13. Communication technology update and fundamentals

    CERN Document Server

    Grant, August E

    2010-01-01

    New communication technologies are being introduced at an astonishing rate. Making sense of these technologies is increasingly difficult. Communication Technology Update and Fundamentals is the single best source for the latest developments, trends, and issues in communication technology. Featuring the fundamental framework along with the history and background of communication technologies, Communication Technology Update and Fundamentals, 12th edition helps you stay ahead of these ever-changing and emerging technologies.As always, every chapter ha

  14. Episodic fieldwork, updating, and sociability

    DEFF Research Database (Denmark)

    Whyte, M.

    2013-01-01

    on these relationships. I draw on Simmel's concept of sociability to explore the significance of the recurring updates that are so much a part of long-term and thus episodic fieldwork. Updating suggests participation, positionality, and transformation-as well as play and familiarity. The presumption of familiarity......, which is at the heart of sociability, becomes a tool for exploring time and new social experiences and the ways in which chronology is interwoven with shifting social positions....

  15. Recovery rate affects the effective epidemic threshold with synchronous updating

    CERN Document Server

    Shu, Panpan; Tang, Ming; Zhao, Pengcheng; Zhang, Yi-Cheng

    2016-01-01

    Accurate identification of effective epidemic threshold is essential for understanding epidemic dynamics on complex networks. The existing studies on the effective epidemic threshold of the susceptible-infected-removed (SIR) model generally assume that all infected nodes immediately recover after the infection process, which more or less does not conform to the realistic situation of disease. In this paper, we systematically study the effect of arbitrary recovery rate on the SIR spreading dynamics on complex networks. We derive the theoretical effective epidemic threshold and final outbreak size based on the edge-based compartmental theory. To validate the proposed theoretical predictions, extensive numerical experiments are implemented by using asynchronous and synchronous updating methods. When asynchronous updating method is used in simulations, recovery rate does not affect the final state of spreading dynamics. But with synchronous updating, we find that the effective epidemic threshold decreases with re...

  16. Online Updating of Statistical Inference in the Big Data Setting.

    Science.gov (United States)

    Schifano, Elizabeth D; Wu, Jing; Wang, Chun; Yan, Jun; Chen, Ming-Hui

    2016-01-01

    We present statistical methods for big data arising from online analytical processing, where large amounts of data arrive in streams and require fast analysis without storage/access to the historical data. In particular, we develop iterative estimating algorithms and statistical inferences for linear models and estimating equations that update as new data arrive. These algorithms are computationally efficient, minimally storage-intensive, and allow for possible rank deficiencies in the subset design matrices due to rare-event covariates. Within the linear model setting, the proposed online-updating framework leads to predictive residual tests that can be used to assess the goodness-of-fit of the hypothesized model. We also propose a new online-updating estimator under the estimating equation setting. Theoretical properties of the goodness-of-fit tests and proposed estimators are examined in detail. In simulation studies and real data applications, our estimator compares favorably with competing approaches under the estimating equation setting.

  17. Secure Geographical routing in MANET using the Adaptive Position Update

    Directory of Open Access Journals (Sweden)

    Aruna Rao S.L

    2014-09-01

    Full Text Available MANETs are infrastructure free network, hence are mostly vulnerable to attacks and maintaining the anonymity of the nodes is also becoming a major concern. Most of the existing geographical routing methodology in Mobile Ad Hoc Networks (MANET does not include any position update mechanism for anonymous mobile nodes. In this paper, we propose a secure geographical routing which uses an adaptive position update technique for MANET. When source wants to transmit the data to destination, it establishes a secured geographical route using group signature. Then a position update technique is used to dynamically adjust the position of nodes based on mobility and network forwarding patterns. The malicious node detection technique is used to detect the malicious node. By simulation results, we show that the proposed technique reduces packet dropping and enhances the packet delivery ratio.

  18. Inherently irrational? A computational model of escalation of commitment as Bayesian Updating.

    Science.gov (United States)

    Gilroy, Shawn P; Hantula, Donald A

    2016-06-01

    Monte Carlo simulations were performed to analyze the degree to which two-, three- and four-step learning histories of losses and gains correlated with escalation and persistence in extended extinction (continuous loss) conditions. Simulated learning histories were randomly generated at varying lengths and compositions and warranted probabilities were determined using Bayesian Updating methods. Bayesian Updating predicted instances where particular learning sequences were more likely to engender escalation and persistence under extinction conditions. All simulations revealed greater rates of escalation and persistence in the presence of heterogeneous (e.g., both Wins and Losses) lag sequences, with substantially increased rates of escalation when lags comprised predominantly of losses were followed by wins. These methods were then applied to human investment choices in earlier experiments. The Bayesian Updating models corresponded with data obtained from these experiments. These findings suggest that Bayesian Updating can be utilized as a model for understanding how and when individual commitment may escalate and persist despite continued failures.

  19. Optimistic update bias holds firm: Three tests of robustness following Shah et al.

    Science.gov (United States)

    Garrett, Neil; Sharot, Tali

    2017-04-01

    A diverse body of research has demonstrated that people update their beliefs to a greater extent when receiving good news compared to bad news. Recently, a paper by Shah et al. claimed that this asymmetry does not exist. Here we carefully examine the experiments and simulations described in Shah et al. and follow their analytic approach on our data sets. After correcting for confounds we identify in the experiments of Shah et al., an optimistic update bias for positive life events is revealed. Contrary to claims made by Shah et al., we observe that participants update their beliefs in a more Bayesian manner after receiving good news than bad. Finally, we show that the parameters Shah et al. pre-selected for simulations are at odds with participants' data, making these simulations irrelevant to the question asked. Together this report makes a strong case for a true optimistic asymmetry in belief updating.

  20. VIIP 2017 Clinical Update

    Science.gov (United States)

    Tarver, William

    2017-01-01

    INTRODUCTION: NASA's Space Medicine community knowledge regarding the "Vision Impairment Intracranial Pressure", or VIIP.has been evolving over time.. Various measures of occupational health related to this condition had to be determined and then plans/processes put into place. The most robust of these processes were inititated in 2010. This presentation will provide a clinic update of the astronaut occupational health data related to VIIP. METHODS: NASA and its international partners require its astronauts to undergo routine health measures deemed important to monitoring VIIP. The concern is that the spaceflight environment aboard ISS could cause some astronauts to have physiologic changes detrimental to either ongoing mission operations or long-term health related to the ocular system and possibly the CNS. Specific medical tests include but are not limited to brain/orbit MRI (NASA unique protocol), OCT, fundoscopy and ocular ultrasound. Measures are taken prior to spaceflight, in-flight and post-flight. Measures to be reported include incidence of disc edema, globe flattening, choroidal folds, ONSD and change in refractive error. RESULTS: 73 ISS astronauts have been evaluated at least partially for VIIP related measures. Of these individuals, approximately 1 in 7 have experienced disc edema. The prevalence of the other findings is more complicated as the medical testing has changed over time. Overall, 26 separate individuals have experienced at least one of the findings NASA has associated with VIIP Another confounding factor is most of the astronauts have prior spaceflight experience at the time of the "pre-flight" testing. DISCUSSION: In 2010 NASA and its US operating segment (USOS) partners (CSA, ESA and JAXA) began routine occupational monitoring and data collection for most VIIP related changes. Interpretation of that data is extremely challenging for several reasons. For example, the determination of disc edema is the most complete finding as we have had

  1. Finite Element Model Updating Using Response Surface Method

    CERN Document Server

    Marwala, Tshilidzi

    2007-01-01

    This paper proposes the response surface method for finite element model updating. The response surface method is implemented by approximating the finite element model surface response equation by a multi-layer perceptron. The updated parameters of the finite element model were calculated using genetic algorithm by optimizing the surface response equation. The proposed method was compared to the existing methods that use simulated annealing or genetic algorithm together with a full finite element model for finite element model updating. The proposed method was tested on an unsymmetri-cal H-shaped structure. It was observed that the proposed method gave the updated natural frequen-cies and mode shapes that were of the same order of accuracy as those given by simulated annealing and genetic algorithm. Furthermore, it was observed that the response surface method achieved these results at a computational speed that was more than 2.5 times as fast as the genetic algorithm and a full finite element model and 24 ti...

  2. How to Green Windows Update?

    Directory of Open Access Journals (Sweden)

    Seifedine Kadry

    2012-11-01

    Full Text Available The most important challenges facing the earth in the future are energy, water, environment and food security, Green IT contributes in significant role in finding solutions because it consume energy more efficient and reduce pollution in water, air and soil in addition to improving economy because Green IT is manage energy sources by reducing energy consumption with good performance. Most of energy consumed around the world depends on non-renewable energy and part of this energy consumed to update technologies In this paper ,we will study one of the most important tools in Microsoft, which is used in order to help users to get updates of Microsoft's products, which is called windows server update services (WSUS, which is helping to reduce energy consumption, we will study this tool and then try to make it more green by reducing the send / receive between Microsoft Update (MU and WSUS, which will reduce energy consumption, and we will propose algorithm and compared the energy consumption in the current design with energy consumption in the proposed design. This design will open the way for future work in order to make sending updates in MU less energy consumption by apply conditional sending and that will help to improve the performance of MU added to improve the network performance with more efficient consumption of energy.

  3. Finite-element-model updating using computational intelligence techniques applications to structural dynamics

    CERN Document Server

    Marwala, Tshilidzi

    2010-01-01

    Finite element models (FEMs) are widely used to understand the dynamic behaviour of various systems. FEM updating allows FEMs to be tuned better to reflect measured data and may be conducted using two different statistical frameworks: the maximum likelihood approach and Bayesian approaches. Finite Element Model Updating Using Computational Intelligence Techniques applies both strategies to the field of structural mechanics, an area vital for aerospace, civil and mechanical engineering. Vibration data is used for the updating process. Following an introduction a number of computational intelligence techniques to facilitate the updating process are proposed; they include: • multi-layer perceptron neural networks for real-time FEM updating; • particle swarm and genetic-algorithm-based optimization methods to accommodate the demands of global versus local optimization models; • simulated annealing to put the methodologies into a sound statistical basis; and • response surface methods and expectation m...

  4. Update rules and interevent time distributions: Slow ordering vs. no ordering in the Voter Model

    CERN Document Server

    Fernández-Gracia, Juan; Miguel, M San

    2011-01-01

    We introduce a general methodology of update rules accounting for arbitrary interevent time distributions in simulations of interacting agents. In particular we consider update rules that depend on the state of the agent, so that the update becomes part of the dynamical model. As an illustration we consider the voter model in fully-connected, random and scale free networks with an update probability inversely proportional to the persistence, that is, the time since the last event. We find that in the thermodynamic limit, at variance with standard updates, the system orders slowly. The approach to the absorbing state is characterized by a power law decay of the density of interfaces, observing that the mean time to reach the absorbing state might be not well defined.

  5. Updated safety analysis of ITER

    Energy Technology Data Exchange (ETDEWEB)

    Taylor, Neill, E-mail: neill.taylor@iter.org [ITER Organization, CS 90 046, 13067 St Paul Lez Durance Cedex (France); Baker, Dennis; Ciattaglia, Sergio; Cortes, Pierre; Elbez-Uzan, Joelle; Iseli, Markus; Reyes, Susana; Rodriguez-Rodrigo, Lina; Rosanvallon, Sandrine; Topilski, Leonid [ITER Organization, CS 90 046, 13067 St Paul Lez Durance Cedex (France)

    2011-10-15

    An updated version of the ITER Preliminary Safety Report has been produced and submitted to the licensing authorities. It is revised and expanded in response to requests from the authorities after their review of an earlier version in 2008, to reflect enhancements in ITER safety provisions through design changes, to incorporate new and improved safety analyses and to take into account other ITER design evolution. The updated analyses show that changes to the Tokamak cooling water system design have enhanced confinement and reduced potential radiological releases as well as removing decay heat with very high reliability. New and updated accident scenario analyses, together with fire and explosion risk analyses, have shown that design provisions are sufficient to minimize the likelihood of accidents and reduce potential consequences to a very low level. Taken together, the improvements provided a stronger demonstration of the very good safety performance of the ITER design.

  6. Nephrogenic systemic fibrosis: epidemiology update

    DEFF Research Database (Denmark)

    Marckmann, P.

    2008-01-01

    Purpose of review The aim of this article is to outline the history of nephrogenic systemic fibrosis, a new and serious disease of patients with renal failure, and to give an update on its aetiology and prevalence. Recent findings Epidemiological and histochemical studies demonstrated that gadoli......Purpose of review The aim of this article is to outline the history of nephrogenic systemic fibrosis, a new and serious disease of patients with renal failure, and to give an update on its aetiology and prevalence. Recent findings Epidemiological and histochemical studies demonstrated...

  7. Can model updating tell the truth?

    Energy Technology Data Exchange (ETDEWEB)

    Hemez, F.M.

    1998-02-01

    This paper discusses to which extent updating methods may be able to correct finite element models in such a way that the test structure is better simulated. After having unified some of the most popular modal residues used as the basis for optimization algorithms, the relationship between modal residues and model correlation is investigated. This theoretical approach leads to an error estimator that may be implemented to provide an a priori upper bound of a model`s predictive quality relative to test data. These estimates however assume that a full measurement set is available. Finally, an application example is presented that illustrates the effectiveness of the estimator proposed when less measurement points than degrees of freedom are available.

  8. Resource Tracking Model Updates and Trade Studies

    Science.gov (United States)

    Chambliss, Joe; Stambaugh, Imelda; Moore, Michael

    2016-01-01

    The Resource Tracking Model has been updated to capture system manager and project manager inputs. Both the Trick/General Use Nodal Network Solver Resource Tracking Model (RTM) simulator and the RTM mass balance spreadsheet have been revised to address inputs from system managers and to refine the way mass balance is illustrated. The revisions to the RTM included the addition of a Plasma Pyrolysis Assembly (PPA) to recover hydrogen from Sabatier Reactor methane, which was vented in the prior version of the RTM. The effect of the PPA on the overall balance of resources in an exploration vehicle is illustrated in the increased recycle of vehicle oxygen. Case studies have been run to show the relative effect of performance changes on vehicle resources.

  9. CT colonography: an update

    Energy Technology Data Exchange (ETDEWEB)

    Aschoff, Andrik J.; Ernst, Andrea S.; Brambs, Hans-Juergen; Juchems, Markus S. [University Hospitals of Ulm, Diagnostic and Interventional Radiology, Ulm (Germany)

    2008-03-15

    Computed tomographic (CT) colonography (CTC) - also known as ''virtual colonoscopy'' - was first described more than a decade ago. As advancements in scanner technology and three-dimensional (3D) postprocessing helped develop this method to mature into a potential option in screening for colorectal cancer, the fundamentals of the examination remained the same. It is a minimally invasive, CT-based procedure that simulates conventional colonoscopy using 2D and 3D computerized reconstructions. The primary aim of CTC is the detection of colorectal polyps and carcinomas. However, studies reveal a wide performance variety in regard to polyp detection, especially for smaller polyps. This article reviews the available literature, discusses established indications as well as open issues and highlights potential future developments of CTC. (orig.)

  10. CTL Model Update for System Modifications

    CERN Document Server

    Ding, Yulin; Zhang, Yan; Zhang, Y; 10.1613/jair.2420

    2011-01-01

    Model checking is a promising technology, which has been applied for verification of many hardware and software systems. In this paper, we introduce the concept of model update towards the development of an automatic system modification tool that extends model checking functions. We define primitive update operations on the models of Computation Tree Logic (CTL) and formalize the principle of minimal change for CTL model update. These primitive update operations, together with the underlying minimal change principle, serve as the foundation for CTL model update. Essential semantic and computational characterizations are provided for our CTL model update approach. We then describe a formal algorithm that implements this approach. We also illustrate two case studies of CTL model updates for the well-known microwave oven example and the Andrew File System 1, from which we further propose a method to optimize the update results in complex system modifications.

  11. "Updates to Model Algorithms & Inputs for the Biogenic Emissions Inventory System (BEIS) Model"

    Science.gov (United States)

    We have developed new canopy emission algorithms and land use data for BEIS. Simulations with BEIS v3.4 and these updates in CMAQ v5.0.2 are compared these changes to the Model of Emissions of Gases and Aerosols from Nature (MEGAN) and evaluated the simulations against observatio...

  12. Stability of Boolean networks: The joint effects of topology and update rules

    Science.gov (United States)

    Squires, Shane; Pomerance, Andrew; Girvan, Michelle; Ott, Edward

    2014-08-01

    We study the stability of orbits in large Boolean networks. We treat the case in which the network has a given complex topology, and we do not assume a specific form for the update rules, which may be correlated with local topological properties of the network. While recent past work has addressed the separate effects of complex network topology and certain classes of update rules on stability, only crude results exist about how these effects interact. We present a widely applicable solution to this problem. Numerical simulations confirm our theory and show that local correlations between topology and update rules can have profound effects on the qualitative behavior of these systems.

  13. The influence of learning and updating speed on the growth of commercial websites

    Science.gov (United States)

    Wan, Xiaoji; Deng, Guishi; Bai, Yang; Xue, Shaowei

    2012-08-01

    In this paper, we study the competition model of commercial websites with learning and updating speed, and further analyze the influence of learning and updating speed on the growth of commercial websites from a nonlinear dynamics perspective. Using the center manifold theory and the normal form method, we give the explicit formulas determining the stability and periodic fluctuation of commercial sites. Numerical simulations reveal that sites periodically fluctuate as the speed of learning and updating crosses one threshold. The study provides reference and evidence for website operators to make decisions.

  14. Flow Forecasting in Urban Drainage Systems using Deterministic Updating of Water Levels in Distributed Hydraulic Models

    DEFF Research Database (Denmark)

    Hansen, Lisbeth S.; Borup, Morten; Møller, A.;

    2011-01-01

    the performance of the updating procedure for flow forecasting. Measured water levels in combination with rain gauge input are used as basis for the evaluation. When compared to simulations without updating, the results show that it is possible to obtain an improvement in the 20 minute forecast of the water level...... to eliminate some of the unavoidable discrepancies between model and reality. The latter can partly be achieved by using the commercial tool MOUSE UPDATE, which is capable of inserting measured water levels from the system into the distributed, physically based MOUSE model. This study evaluates and documents...

  15. Spread and Quote-Update Frequency of the Limit-Order Driven Sergei Maslov Model

    Institute of Scientific and Technical Information of China (English)

    QIU Tian; CHEN Guang

    2007-01-01

    @@ We perform numerical simulations of the limit-order driven Sergei Maslov (SM) model and investigate the probability distribution and autocorrelation function of the bid-ask spread S and the quote-update frequency U.For the probability distribution, the model successfully reproduces the power law decay of the spread and the exponential decay of the quote-update frequency. For the autocorrelation function, both the spread and the quote-update frequency of the model decay by a power law, which is consistent with the empirical study. We obtain the power law exponent 0.54 for the spread, which is in good agreement with the real financial market.

  16. Wind turbine reliability database update.

    Energy Technology Data Exchange (ETDEWEB)

    Peters, Valerie A.; Hill, Roger Ray; Stinebaugh, Jennifer A.; Veers, Paul S.

    2009-03-01

    This report documents the status of the Sandia National Laboratories' Wind Plant Reliability Database. Included in this report are updates on the form and contents of the Database, which stems from a fivestep process of data partnerships, data definition and transfer, data formatting and normalization, analysis, and reporting. Selected observations are also reported.

  17. Upgrade trigger: Biannual performance update

    CERN Document Server

    Aaij, Roel; Couturier, Ben; Esen, Sevda; De Cian, Michel; De Vries, Jacco Andreas; Dziurda, Agnieszka; Fitzpatrick, Conor; Fontana, Marianna; Grillo, Lucia; Hasse, Christoph; Jones, Christopher Rob; Le Gac, Renaud; Matev, Rosen; Neufeld, Niko; Nikodem, Thomas; Polci, Francesco; Del Buono, Luigi; Quagliani, Renato; Schwemmer, Rainer; Seyfert, Paul; Stahl, Sascha; Szumlak, Tomasz; Vesterinen, Mika Anton; Wanczyk, Joanna; Williams, Mark Richard James; Yin, Hang; Zacharjasz, Emilia Anna

    2017-01-01

    This document presents the performance of the LHCb Upgrade trigger reconstruction sequence, incorporating changes to the underlying reconstruction algorithms and detector description since the Trigger and Online Upgrade TDR. An updated extrapolation is presented using the most recent example of an Event Filter Farm node.

  18. Mozambique Economic Update, December 2016

    OpenAIRE

    2016-01-01

    This Mozambique economic update brief for 2016 includes a section on recent economic developments and a discussion of Mozambique’s economic outlook, followed by focus section(s) analyzing issues of particular importance.This has been a testing year for Mozambique. An ongoing downturn, brought about by low commodity prices, drought and conflict, was compounded by the fallout from the discov...

  19. Bangladesh Development Update, October 2016

    OpenAIRE

    2016-01-01

    This update introduces Bangladesh's new poverty numbers at $1.90 per capita per day in 2011 purchasing power parity (PPP) prices, followed by an account of recent economic development, the outlook, risks, and policy responses. The revised poverty rates are significantly lower, but follow the same downward historical trend seen when using the 2005 international extreme poverty line. Banglad...

  20. Anterior cruciate ligament - updating article

    Directory of Open Access Journals (Sweden)

    Marcus Vinicius Malheiros Luzo

    2016-08-01

    Full Text Available ABSTRACT This updating article on the anterior cruciate ligament (ACL has the aim of addressing some of the most interesting current topics in this field. Within this stratified approach, it contains the following sections: ACL remnant; anterolateral ligament and combined intra and extra-articular reconstruction; fixation devices; and ACL femoral tunnel creation techniques.

  1. Evidence-based guideline update

    DEFF Research Database (Denmark)

    Tfelt-Hansen, Peer Carsten

    2013-01-01

    Peer Carsten Tfelt-Hansen, Glostrup, Denmark: According to the recent American Academy of Neurology (AAN) guideline update, a drug can be recommended as possibly effective for migraine prevention if it had demonstrated efficacy in one Class II study.(1) Eight drugs are recommended as possibly...

  2. Update of CERN exchange network

    CERN Multimedia

    2003-01-01

    An update of the CERN exchange network will be done next April. Disturbances or even interruptions of telephony services may occur from 4th to 24th April during evenings from 18:30 to 00:00 but will not exceed more than 4 consecutive hours (see tentative planning below). In addition, the voice messaging system will be shut down on March, 26th April from 18:00 to 00:00. Calls supposed to be routed to the voice messaging system will not be possible during the shutdown. CERN divisions are invited to avoid any change requests (set-ups, move or removals) of telephones and fax machines from 4th to 25th April. Everything will be done to minimize potential inconveniences which may occur during this update. There will be no loss of telephone functionalities. CERN GSM portable phones won't be affected by this change. Should you need more details, please send us your questions by email to Standard.Telephone@cern.ch. Date Change type Affected areas April 8 Update of switch in LHC 7 LHC 7 Point April 9 Update of...

  3. Update of CERN exchange network

    CERN Multimedia

    2003-01-01

    An update of the CERN exchange network will be done next April. Disturbances or even interruptions of telephony services may occur from 4th to 24th April during evenings from 18:30 to 00:00 but will not exceed more than 4 consecutive hours (see tentative planning below). In addition, the voice messaging system will be shut down on March, 26th April from 18:00 to 00:00. Calls supposed to be routed to the voice messaging system will not be possible during the shutdown. CERN divisions are invited to avoid any change requests (set-ups, move or removals) of telephones and fax machines from 4th to 25th April. Everything will be done to minimize potential inconveniences which may occur during this update. There will be no loss of telephone functionalities. CERN GSM portable phones won't be affected by this change. Should you need more details, please send us your questions by email to Standard.Telephone@cern.ch. DateChange typeAffected areas March 26Update of the voice messaging systemAll CERN sites April 4Updat...

  4. AMDIS and CHART update. 1

    Energy Technology Data Exchange (ETDEWEB)

    Murakami, I.; Kato, T. [National Inst. for Fusion Science, Toki, Gifu (Japan); Igarashi, A. [Miyazaki Univ., Miyazaki (JP)] [and others

    2002-10-01

    A working group for updating atomic and molecular collision data in the NIFS database AMDIS (electron scattering) and CHART (ion scattering) has been organized. This group has searched and reviewed literatures for collecting relevant atomic data with are to be included into the database. This is a summary report of the activities of this working group. (author)

  5. A Mathematics Software Database Update.

    Science.gov (United States)

    Cunningham, R. S.; Smith, David A.

    1987-01-01

    Contains an update of an earlier listing of software for mathematics instruction at the college level. Topics are: advanced mathematics, algebra, calculus, differential equations, discrete mathematics, equation solving, general mathematics, geometry, linear and matrix algebra, logic, statistics and probability, and trigonometry. (PK)

  6. Legal Update of Gifted Education

    Science.gov (United States)

    Zirkel, Perry A.

    2016-01-01

    This update of the legislation/regulations and case law specific to pre-K-12 gifted students since a cluster of publications in 2004-2005 primarily focuses on the "gifted alone" category, with only secondary attention to twice-exceptional and other students in the "gifted plus" category. For the gifted-alone category, the…

  7. Eczema and ceramides: an update

    DEFF Research Database (Denmark)

    Jungersted, Jakob Mutanu; Agner, Tove

    2013-01-01

    types of treatment. We also consider the genetic influence on stratum corneum lipids. The review is an update on research indexed in PubMed following the discovery of the filaggrin mutations in atopic dermatitis in 2006, but when newer publications cannot stand alone, we include publications from before...

  8. NACRE Update and Extension Project

    Science.gov (United States)

    Aikawa, Masayuki; Arai, Koji; Arnould, Marcel; Takahashi, Kohji; Utsunomiya, Hiroaki

    2006-04-01

    NACRE, the `nuclear astrophysics compilation of reaction rates', has been widely utilized in stellar evolution and nucleosynthesis studies since its publication in 1999. We describe here the current status of a Konan-Université Libre de Bruxelles (ULB) joint project that aims at its update and extension.

  9. Anterior cruciate ligament - updating article.

    Science.gov (United States)

    Luzo, Marcus Vinicius Malheiros; Franciozi, Carlos Eduardo da Silveira; Rezende, Fernando Cury; Gracitelli, Guilherme Conforto; Debieux, Pedro; Cohen, Moisés

    2016-01-01

    This updating article on the anterior cruciate ligament (ACL) has the aim of addressing some of the most interesting current topics in this field. Within this stratified approach, it contains the following sections: ACL remnant; anterolateral ligament and combined intra and extra-articular reconstruction; fixation devices; and ACL femoral tunnel creation techniques.

  10. Model validation: Correlation for updating

    Indian Academy of Sciences (India)

    D J Ewins

    2000-06-01

    In this paper, a review is presented of the various methods which are available for the purpose of performing a systematic comparison and correlation between two sets of vibration data. In the present case, the application of interest is in conducting this correlation process as a prelude to model correlation or updating activity.

  11. Belief update as social choice

    NARCIS (Netherlands)

    van Benthem, J.; Girard, P.; Roy, O.; Marion, M.

    2011-01-01

    Dynamic epistemic-doxastic logics describe the new knowledge or new beliefs indexBelief of agents after some informational event has happened. Technically, this requires an update rule that turns a doxastic-epistemic modelM(recording the current information state of the agents) and a dynamic ‘event

  12. Warthog: Coupling Status Update

    Energy Technology Data Exchange (ETDEWEB)

    Hart, Shane W. D. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Reardon, Bradley T. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2017-06-30

    The Warthog code was developed to couple codes that are developed in both the Multi-Physics Object-Oriented Simulation Environment (MOOSE) from Idaho National Laboratory (INL) and SHARP from Argonne National Laboratory (ANL). The initial phase of this work, focused on coupling the neutronics code PROTEUS with the fuel performance code BISON. The main technical challenge involves mapping the power density solution determined by PROTEUS to the fuel in BISON. This presents a challenge since PROTEUS uses the MOAB mesh format, but BISON, like all other MOOSE codes, uses the libMesh format. When coupling the different codes, one must consider that Warthog is a light-weight MOOSE-based program that uses the Data Transfer Kit (DTK) to transfer data between the various mesh types. Users set up inputs for the codes they want to run, and then Warthog transfers the data between them. Currently Warthog supports XSProc from SCALE or the Sub-Group Application Programming Interface (SGAPI) in PROTEUS for generating cross sections. It supports arbitrary geometries using PROTEUS and BISON. DTK will transfer power densities and temperatures between the codes where the domains overlap. In the past fiscal year (FY), much work has gone into demonstrating two-way coupling for simple pin cells of various materials. XSProc was used to calculate the cross sections, which were then passed to PROTEUS in an external file. PROTEUS calculates the fission/power density, and Warthog uses DTK to pass this information to BISON, where it is used as the heat source. BISON then calculates the temperature profile of the pin cell and sends it back to XSProc to obtain the temperature corrected cross sections. This process is repeated until the convergence criteria (tolerance on BISON solve, or number of time steps) is reached. Models have been constructed and run for both uranium oxide and uranium silicide fuels. These models demonstrate a clear difference in power shape that is not accounted for in a

  13. RELAP-7 Pressurizer Component Development Updates

    Energy Technology Data Exchange (ETDEWEB)

    Zhao, Haihua [Idaho National Lab. (INL), Idaho Falls, ID (United States); Zhang, Hongbin [Idaho National Lab. (INL), Idaho Falls, ID (United States); Zou, Ling [Idaho National Lab. (INL), Idaho Falls, ID (United States); Martineau, Richard [Idaho National Lab. (INL), Idaho Falls, ID (United States); Holten, Michael [Oregon State Univ., Corvallis, OR (United States). Dept. of Nuclear Engineering and Radiation Health Physics; Wu, Qiao [Oregon State Univ., Corvallis, OR (United States). Dept. of Nuclear Engineering and Radiation Health Physics

    2016-03-01

    RELAP-7 is a nuclear systems safety analysis code being developed at the Idaho National Laboratory (INL). RELAP-7 development began in 2011 to support the Risk Informed Safety Margins Characterization (RISMC) Pathway of the Light Water Reactor Sustainability (LWRS) program. The overall design goal of RELAP-7 is to take advantage of the previous thirty years of advancements in computer architecture, software design, numerical methods, and physical models in order to provide capabilities needed for the RISMC methodology and to support nuclear power safety analysis. The code is being developed based on Idaho National Laboratory’s modern scientific software development framework – MOOSE (the Multi-Physics Object-Oriented Simulation Environment). The initial development goal of the RELAP-7 approach focused primarily on the development of an implicit algorithm capable of strong (nonlinear) coupling of the dependent hydrodynamic variables contained in the 1-D/2-D flow models with the various 0-D system reactor components that compose various boiling water reactor (BWR) and pressurized water reactor nuclear power plants (NPPs). As part of the efforts to expand the capability for PWR simulation, an equilibrium single-region pressurizer model has been implemented in RELAP-7. The pressurizer component can simulate pressure and water level change through insurge, spray, and heating processes. Two simple tests – one for insurge process and another for outsurge process – have been reported to demonstrate and verify the functions of the pressurizer model. The typical single-phase PWR system model presented in the first RELAP-7 milestone report has been updated, as part of system level test for the new pressurizer model. The updated PWR system model with the pressurizer component can be used for more realistic transient simulations. The addition of the equilibrium single-region pressurizer model represents the first step of developing a suite of pressurizer models with

  14. 75 FR 70124 - Product List Update

    Science.gov (United States)

    2010-11-17

    ... 30 CFR Part 3020 Product List Update AGENCY: Postal Regulatory Commission. ACTION: Final rule... Commission order. The referenced policy assumes periodic updates. The updates are identified in the body of this document. The product lists, which are re-published in their entirety, include these...

  15. 76 FR 1357 - Product List Update

    Science.gov (United States)

    2011-01-10

    ... 30 CFR Part 3020 Product List Update AGENCY: Postal Regulatory Commission. ACTION: Final rule... Commission order. The referenced policy assumes periodic updates. The updates are identified in the body of this document. The product lists, which are re-published in their entirety, include these...

  16. 77 FR 41258 - FOIA Fee Schedule Update

    Science.gov (United States)

    2012-07-13

    ... SAFETY BOARD 10 CFR Part 1703 FOIA Fee Schedule Update AGENCY: Defense Nuclear Facilities Safety Board... publishing its Freedom of Information Act (FOIA) Fee Schedule Update pursuant to the Board's regulations..., the Board's General Manager will update the FOIA Fee Schedule once every 12 months. The previous...

  17. 75 FR 81037 - Waste Confidence Decision Update

    Science.gov (United States)

    2010-12-23

    ... COMMISSION 10 CFR Part 51 Waste Confidence Decision Update AGENCY: Nuclear Regulatory Commission. ACTION: Update and final revision of Waste Confidence Decision. SUMMARY: The U.S. Nuclear Regulatory Commission... update to the Decision were products of rulemaking proceedings designed to assess the degree of...

  18. 76 FR 43819 - FOIA Fee Schedule Update

    Science.gov (United States)

    2011-07-22

    ... SAFETY BOARD 10 CFR Part 1703 FOIA Fee Schedule Update AGENCY: Defense Nuclear Facilities Safety Board... publishing its Freedom of Information Act (FOIA) Fee Schedule Update pursuant to the Board's regulations... General Manager will update the FOIA Fee Schedule once every 12 months. The previous Fee Schedule...

  19. 76 FR 9648 - Product List Update

    Science.gov (United States)

    2011-02-22

    ... 39 CFR Part 3020 Product List Update AGENCY: Postal Regulatory Commission. ACTION: Final rule... Commission order. The referenced policy assumes periodic updates. The updates are identified in the body of this document. The product lists, which are re-published in their entirety, include these...

  20. 77 FR 75377 - Product List Update

    Science.gov (United States)

    2012-12-20

    ... 39 CFR Part 3020 Product List Update AGENCY: Postal Regulatory Commission. ACTION: Final rule... Commission order. The referenced policy assumes periodic updates. The updates are identified in the body of this document. The product lists, which are re-published in their entirety, include these...

  1. Flow Forecasting using Deterministic Updating of Water Levels in Distributed Hydrodynamic Urban Drainage Models

    Directory of Open Access Journals (Sweden)

    Lisbet Sneftrup Hansen

    2014-07-01

    Full Text Available There is a growing requirement to generate more precise model simulations and forecasts of flows in urban drainage systems in both offline and online situations. Data assimilation tools are hence needed to make it possible to include system measurements in distributed, physically-based urban drainage models and reduce a number of unavoidable discrepancies between the model and reality. The latter can be achieved partly by inserting measured water levels from the sewer system into the model. This article describes how deterministic updating of model states in this manner affects a simulation, and then evaluates and documents the performance of this particular updating procedure for flow forecasting. A hypothetical case study and synthetic observations are used to illustrate how the Update method works and affects downstream nodes. A real case study in a 544 ha urban catchment furthermore shows that it is possible to improve the 20-min forecast of water levels in an updated node and the three-hour forecast of flow through a downstream node, compared to simulations without updating. Deterministic water level updating produces better forecasts when implemented in large networks with slow flow dynamics and with measurements from upstream basins that contribute significantly to the flow at the forecast location.

  2. Recovery rate affects the effective epidemic threshold with synchronous updating.

    Science.gov (United States)

    Shu, Panpan; Wang, Wei; Tang, Ming; Zhao, Pengcheng; Zhang, Yi-Cheng

    2016-06-01

    Accurate identification of effective epidemic threshold is essential for understanding epidemic dynamics on complex networks. In this paper, we systematically study how the recovery rate affects the susceptible-infected-removed spreading dynamics on complex networks, where synchronous and asynchronous updating processes are taken into account. We derive the theoretical effective epidemic threshold and final outbreak size based on the edge-based compartmental theory. To validate the proposed theoretical predictions, extensive numerical experiments are implemented by using asynchronous and synchronous updating methods. When asynchronous updating method is used in simulations, recovery rate does not affect the final state of spreading dynamics. But with synchronous updating, we find that the effective epidemic threshold decreases with recovery rate, and final outbreak size increases with recovery rate. A good agreement between the theoretical predictions and the numerical results are observed on both synthetic and real-world networks. Our results extend the existing theoretical studies and help us to understand the phase transition with arbitrary recovery rate.

  3. DSN Array Simulator

    Science.gov (United States)

    Tikidjian, Raffi; Mackey, Ryan

    2008-01-01

    The DSN Array Simulator (wherein 'DSN' signifies NASA's Deep Space Network) is an updated version of software previously denoted the DSN Receive Array Technology Assessment Simulation. This software (see figure) is used for computational modeling of a proposed DSN facility comprising user-defined arrays of antennas and transmitting and receiving equipment for microwave communication with spacecraft on interplanetary missions. The simulation includes variations in spacecraft tracked and communication demand changes for up to several decades of future operation. Such modeling is performed to estimate facility performance, evaluate requirements that govern facility design, and evaluate proposed improvements in hardware and/or software. The updated version of this software affords enhanced capability for characterizing facility performance against user-defined mission sets. The software includes a Monte Carlo simulation component that enables rapid generation of key mission-set metrics (e.g., numbers of links, data rates, and date volumes), and statistical distributions thereof as functions of time. The updated version also offers expanded capability for mixed-asset network modeling--for example, for running scenarios that involve user-definable mixtures of antennas having different diameters (in contradistinction to a fixed number of antennas having the same fixed diameter). The improved version also affords greater simulation fidelity, sufficient for validation by comparison with actual DSN operations and analytically predictable performance metrics.

  4. RELAP-7 Development Updates

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Hongbin [Idaho National Lab. (INL), Idaho Falls, ID (United States); Zhao, Haihua [Idaho National Lab. (INL), Idaho Falls, ID (United States); Gleicher, Frederick Nathan [Idaho National Lab. (INL), Idaho Falls, ID (United States); DeHart, Mark David [Idaho National Lab. (INL), Idaho Falls, ID (United States); Zou, Ling [Idaho National Lab. (INL), Idaho Falls, ID (United States); Andrs, David [Idaho National Lab. (INL), Idaho Falls, ID (United States); Martineau, Richard Charles [Idaho National Lab. (INL), Idaho Falls, ID (United States)

    2015-09-01

    RELAP-7 is a nuclear systems safety analysis code being developed at the Idaho National Laboratory, and is the next generation tool in the RELAP reactor safety/systems analysis application series. RELAP-7 development began in 2011 to support the Risk Informed Safety Margins Characterization (RISMC) Pathway of the Light Water Reactor Sustainability (LWRS) program. The overall design goal of RELAP-7 is to take advantage of the previous thirty years of advancements in computer architecture, software design, numerical methods, and physical models in order to provide capabilities needed for the RISMC methodology and to support nuclear power safety analysis. The code is being developed based on Idaho National Laboratory’s modern scientific software development framework – MOOSE (the Multi-Physics Object-Oriented Simulation Environment). The initial development goal of the RELAP-7 approach focused primarily on the development of an implicit algorithm capable of strong (nonlinear) coupling of the dependent hydrodynamic variables contained in the 1-D/2-D flow models with the various 0-D system reactor components that compose various boiling water reactor (BWR) and pressurized water reactor nuclear power plants (NPPs). During Fiscal Year (FY) 2015, the RELAP-7 code has been further improved with expanded capability to support boiling water reactor (BWR) and pressurized water reactor NPPs analysis. The accumulator model has been developed. The code has also been coupled with other MOOSE-based applications such as neutronics code RattleSnake and fuel performance code BISON to perform multiphysics analysis. A major design requirement for the implicit algorithm in RELAP-7 is that it is capable of second-order discretization accuracy in both space and time, which eliminates the traditional first-order approximation errors. The second-order temporal is achieved by a second-order backward temporal difference, and the one-dimensional second-order accurate spatial discretization

  5. [Preoperative fasting guidelines: an update].

    Science.gov (United States)

    López Muñoz, A C; Busto Aguirreurreta, N; Tomás Braulio, J

    2015-03-01

    Anesthesiology societies have issued various guidelines on preoperative fasting since 1990, not only to decrease the incidence of lung aspiration and anesthetic morbidity, but also to increase patient comfort prior to anesthesia. Some of these societies have been updating their guidelines, as such that, since 2010, we now have 2 evidence-based preoperative fasting guidelines available. In this article, an attempt is made to review these updated guidelines, as well as the current instructions for more controversial patients such as infants, the obese, and a particular type of ophthalmic surgery. Copyright © 2014 Sociedad Española de Anestesiología, Reanimación y Terapéutica del Dolor. Publicado por Elsevier España, S.L.U. All rights reserved.

  6. Nonparametric methods in actigraphy: An update

    Directory of Open Access Journals (Sweden)

    Bruno S.B. Gonçalves

    2014-09-01

    Full Text Available Circadian rhythmicity in humans has been well studied using actigraphy, a method of measuring gross motor movement. As actigraphic technology continues to evolve, it is important for data analysis to keep pace with new variables and features. Our objective is to study the behavior of two variables, interdaily stability and intradaily variability, to describe rest activity rhythm. Simulated data and actigraphy data of humans, rats, and marmosets were used in this study. We modified the method of calculation for IV and IS by modifying the time intervals of analysis. For each variable, we calculated the average value (IVm and ISm results for each time interval. Simulated data showed that (1 synchronization analysis depends on sample size, and (2 fragmentation is independent of the amplitude of the generated noise. We were able to obtain a significant difference in the fragmentation patterns of stroke patients using an IVm variable, while the variable IV60 was not identified. Rhythmic synchronization of activity and rest was significantly higher in young than adults with Parkinson׳s when using the ISM variable; however, this difference was not seen using IS60. We propose an updated format to calculate rhythmic fragmentation, including two additional optional variables. These alternative methods of nonparametric analysis aim to more precisely detect sleep–wake cycle fragmentation and synchronization.

  7. Nonparametric methods in actigraphy: An update

    Science.gov (United States)

    Gonçalves, Bruno S.B.; Cavalcanti, Paula R.A.; Tavares, Gracilene R.; Campos, Tania F.; Araujo, John F.

    2014-01-01

    Circadian rhythmicity in humans has been well studied using actigraphy, a method of measuring gross motor movement. As actigraphic technology continues to evolve, it is important for data analysis to keep pace with new variables and features. Our objective is to study the behavior of two variables, interdaily stability and intradaily variability, to describe rest activity rhythm. Simulated data and actigraphy data of humans, rats, and marmosets were used in this study. We modified the method of calculation for IV and IS by modifying the time intervals of analysis. For each variable, we calculated the average value (IVm and ISm) results for each time interval. Simulated data showed that (1) synchronization analysis depends on sample size, and (2) fragmentation is independent of the amplitude of the generated noise. We were able to obtain a significant difference in the fragmentation patterns of stroke patients using an IVm variable, while the variable IV60 was not identified. Rhythmic synchronization of activity and rest was significantly higher in young than adults with Parkinson׳s when using the ISM variable; however, this difference was not seen using IS60. We propose an updated format to calculate rhythmic fragmentation, including two additional optional variables. These alternative methods of nonparametric analysis aim to more precisely detect sleep–wake cycle fragmentation and synchronization. PMID:26483921

  8. Biofeedback and Performance: An Update

    Science.gov (United States)

    1984-12-01

    non- biofeedback meditation procedure; a single control was a group untrained in relaxation. It is not clear what instructions if any were given to...and meditation in the treatment of generalized anxiety. Proceedings of the 14th Annual Meeting of the Biofeedback Society of America, 187-189...A Technical Report 658 N BIOFEEDBACK AND PERFORMANCE: Cq AN UPDATE In George H. Lawrence BASIC RESEARCH 6 U.I.S. Army _ Research Institute for the

  9. An update on percutaneous nephrolithotomy

    DEFF Research Database (Denmark)

    Tefekli, A; Cordeiro, E; de la Rosette, J J M C H

    2013-01-01

    Since its introduction in late 1970's, percutaneous nephrolithotomy (PNL) has undergone an evolution in both equipment and technique. This evolution still continues today in the era of minimally invasive treatment options, and is evidenced by the numerous publications. PNL is generally advantageo...... patients managed with PNL worldwide and analyzed the data in detail, producing more than 25 scientific papers. And this update focuses on the lessons learned from the CROES PCNL Global Study....

  10. Post-16 update

    Science.gov (United States)

    1999-01-01

    . It requires good use of computers. Other examples: use modern imaging methods to teach information processing and optics; study `designer materials' to reflect both the inventiveness and the curiosity of physicists. Tell stories from fundamental efforts to understand the world: forces and motion, waves and photons, the structure of the Universe, a hint of relativity. The new AS course has to fit QCA criteria, but should also look beyond them to suggest how to shape the future of A-level physics. Jon Ogborn Director, Institute of Physics Post-16 Initiative The study of matter The study of matter is as central to pure physics as it is to technological applications. Currently Advanced GNVQ Science requires much more detailed knowledge of materials than most A-level courses. But in every case, what 16 - 19 year-old students experience is a rather dated study of engineering materials, with an emphasis on mechanical properties. Almost entirely absent is the notion of our new ability to design materials. Recently, new techniques of visualization, modelling the hierarchy of structures inside a material and simulating the resulting changes in properties, have all dramatically changed the nature of materials science. Post-16 physics courses should mention some new classes of materials responsible for major industrial and social changes. For example, let's look at `soft matter' such as polymers, liquid crystals and emulsions. These are the stuff of Nature, which we are only now learning to imitate. The continuing miniaturization of computer chips and sensors is based on functional properties - optical, electrical, thermal or magnetic. If students are to understand and perhaps later to contribute to developments such as these, they deserve a better introduction. Careful thinking needs to go into deciding what a basic course might entail. But what topic could be better suited to coursework in the form of student research? Teaching about matter in an up-to-date way may sound too

  11. Updated SAO OMI formaldehyde retrieval

    Directory of Open Access Journals (Sweden)

    G. González Abad

    2014-01-01

    Full Text Available We present and discuss the Smithsonian Astrophysical Observatory (SAO formaldehyde (H2CO retrieval algorithm for the Ozone Monitoring Instrument (OMI which is the operational retrieval for NASA OMI H2CO. The version of the algorithm described here includes relevant changes with respect to the operational one, including differences in the reference spectra for H2CO, the fit of O2-O2 collisional complex, updates in the high resolution solar reference spectrum, the use of a model reference sector over the remote Pacific Ocean to normalize the retrievals, an updated Air Mass Factor (AMF calculation scheme, and the inclusion of scattering weights and vertical H2CO profile in the level 2 products. The theoretical basis of the retrieval is discussed in detail. Typical values for retrieved vertical columns are between 4 × 1015 and 4 × 1016 molecules cm−2 with typical fitting uncertainties ranging between 40% and 100%. In high concentration regions the errors are usually reduced to 30%. The detection limit is estimated at 3 × 1015 molecules cm−2. These updated retrievals are compared with previous ones.

  12. Update of CERN exchange network

    CERN Multimedia

    2003-01-01

    An update of the CERN exchange network will be done next April. Disturbances or even interruptions of telephony services may occur from 4th to 24th April during evenings from 18:30 to 00:00 but will not exceed more than 4 consecutive hours (see tentative planning below). In addition, the voice messaging system will be shut down on March, 26th April from 18:00 to 00:00. Calls supposed to be routed to the voice messaging system will not be possible during the shutdown. CERN divisions are invited to avoid any change requests (set-ups, move or removals) of telephones and fax machines from 4th to 25th April. Everything will be done to minimize potential inconveniences which may occur during this update. There will be no loss of telephone functionalities. CERN GSM portable phones won't be affected by this change. Should you need more details, please send us your questions by email to Standard.Telephone@cern.ch. Date Change type Affected areas March 26 Update of the voice messaging system All CERN sites April...

  13. Research on Topographic Map Updating

    Directory of Open Access Journals (Sweden)

    Ivana Javorović

    2013-04-01

    Full Text Available The investigation of interpretability of panchromatic satellite image IRS-1C integrated with multispectral Landsat TM image with the purpose of updating the topographic map sheet at the scale of 1:25 000 has been described. The geocoding of source map was based on trigonometric points of the map sheet. Satellite images were geocoded using control points selected from the map. The contents of map have been vectorized and topographic database designed. The digital image processing improved the interpretability of images. Then, the vectorization of new contents was made. The change detection of the forest and water area was defined by using unsupervised classification of spatial and spectral merged images. Verification of the results was made using corresponding aerial photographs. Although this methodology could not insure the complete updating of topographic map at the scale of 1:25 000, the database has been updated with huge amount of data. Erdas Imagine 8.3. software was used. 

  14. Parallel updating and weighting of multiple spatial maps for visual stability during whole body motion.

    Science.gov (United States)

    Tramper, J J; Medendorp, W P

    2015-12-01

    It is known that the brain uses multiple reference frames to code spatial information, including eye-centered and body-centered frames. When we move our body in space, these internal representations are no longer in register with external space, unless they are actively updated. Whether the brain updates multiple spatial representations in parallel, or whether it restricts its updating mechanisms to a single reference frame from which other representations are constructed, remains an open question. We developed an optimal integration model to simulate the updating of visual space across body motion in multiple or single reference frames. To test this model, we designed an experiment in which participants had to remember the location of a briefly presented target while being translated sideways. The behavioral responses were in agreement with a model that uses a combination of eye- and body-centered representations, weighted according to the reliability in which the target location is stored and updated in each reference frame. Our findings suggest that the brain simultaneously updates multiple spatial representations across body motion. Because both representations are kept in sync, they can be optimally combined to provide a more precise estimate of visual locations in space than based on single-frame updating mechanisms.

  15. Variance analysis for model updating with a finite element based subspace fitting approach

    Science.gov (United States)

    Gautier, Guillaume; Mevel, Laurent; Mencik, Jean-Mathieu; Serra, Roger; Döhler, Michael

    2017-07-01

    Recently, a subspace fitting approach has been proposed for vibration-based finite element model updating. The approach makes use of subspace-based system identification, where the extended observability matrix is estimated from vibration measurements. Finite element model updating is performed by correlating the model-based observability matrix with the estimated one, by using a single set of experimental data. Hence, the updated finite element model only reflects this single test case. However, estimates from vibration measurements are inherently exposed to uncertainty due to unknown excitation, measurement noise and finite data length. In this paper, a covariance estimation procedure for the updated model parameters is proposed, which propagates the data-related covariance to the updated model parameters by considering a first-order sensitivity analysis. In particular, this propagation is performed through each iteration step of the updating minimization problem, by taking into account the covariance between the updated parameters and the data-related quantities. Simulated vibration signals are used to demonstrate the accuracy and practicability of the derived expressions. Furthermore, an application is shown on experimental data of a beam.

  16. A last updating evolution model for online social networks

    Science.gov (United States)

    Bu, Zhan; Xia, Zhengyou; Wang, Jiandong; Zhang, Chengcui

    2013-05-01

    As information technology has advanced, people are turning to electronic media more frequently for communication, and social relationships are increasingly found on online channels. However, there is very limited knowledge about the actual evolution of the online social networks. In this paper, we propose and study a novel evolution network model with the new concept of “last updating time”, which exists in many real-life online social networks. The last updating evolution network model can maintain the robustness of scale-free networks and can improve the network reliance against intentional attacks. What is more, we also found that it has the “small-world effect”, which is the inherent property of most social networks. Simulation experiment based on this model show that the results and the real-life data are consistent, which means that our model is valid.

  17. Timing matters: Lessons From The CA Literature On Updating

    CERN Document Server

    Radax, Wolfgang

    2010-01-01

    In the present article we emphasize the importance of modeling time in the context of agent-based models. To this end, we present a (selective) survey of the Cellular Automata-literature on updating and draw parallels to the issue of agent activation in agent-based models. By means of two simple models, Schelling's segregation model and Epstein's demographic prisoner's dilemma we investigate the influence of choosing different regimes of agent activation. Our experiments indicate that timing is not a critical issue for very simple models but bears huge influence on model behavior and results as soon as the degree of complexity increases only so slightly. After a brief review of the way commonly used ABM simulation environments handle the issue of timing, we draw some tentative conclusions about the importance of timing and the need for more research towards that direction, similar to the concerted effort on updating in cellular automata.

  18. Timing Interactions in Social Simulations: The Voter Model

    Science.gov (United States)

    Fernández-Gracia, Juan; Eguíluz, Víctor M.; Miguel, Maxi San

    The recent availability of huge high resolution datasets on human activities has revealed the heavy-tailed nature of the interevent time distributions. In social simulations of interacting agents the standard approach has been to use Poisson processes to update the state of the agents, which gives rise to very homogeneous activity patterns with a well defined characteristic interevent time. As a paradigmatic opinion model we investigate the voter model and review the standard update rules and propose two new update rules which are able to account for heterogeneous activity patterns. For the new update rules each node gets updated with a probability that depends on the time since the last event of the node, where an event can be an update attempt (exogenous update) or a change of state (endogenous update). We find that both update rules can give rise to power law interevent time distributions, although the endogenous one more robustly. Apart from that for the exogenous update rule and the standard update rules the voter model does not reach consensus in the infinite size limit, while for the endogenous update there exist a coarsening process that drives the system toward consensus configurations.

  19. The role of anti-resonance frequencies from operational modal analysis in finite element model updating

    Science.gov (United States)

    Hanson, D.; Waters, T. P.; Thompson, D. J.; Randall, R. B.; Ford, R. A. J.

    2007-01-01

    Finite element model updating traditionally makes use of both resonance and modeshape information. The mode shape information can also be obtained from anti-resonance frequencies, as has been suggested by a number of researchers in recent years. Anti-resonance frequencies have the advantage over mode shapes that they can be much more accurately identified from measured frequency response functions. Moreover, anti-resonance frequencies can, in principle, be estimated from output-only measurements on operating machinery. The motivation behind this paper is to explore whether the availability of anti-resonances from such output-only techniques would add genuinely new information to the model updating process, which is not already available from using only resonance frequencies. This investigation employs two-degree-of-freedom models of a rigid beam supported on two springs. It includes an assessment of the contribution made to the overall anti-resonance sensitivity by the mode shape components, and also considers model updating through Monte Carlo simulations, experimental verification of the simulation results, and application to a practical mechanical system, in this case a petrol generator set. Analytical expressions are derived for the sensitivity of anti-resonance frequencies to updating parameters such as the ratio of spring stiffnesses, the position of the centre of gravity, and the beam's radius of gyration. These anti-resonance sensitivities are written in terms of natural frequency and mode shape sensitivities so their relative contributions can be assessed. It is found that the contribution made by the mode shape sensitivity varies considerably depending on the value of the parameters, contributing no new information for significant combinations of parameter values. The Monte Carlo simulations compare the performance of the update achieved when using information from: the resonances only; the resonances and either anti-resonance; and the resonances and both

  20. Experimental model updating using frequency response functions

    Science.gov (United States)

    Hong, Yu; Liu, Xi; Dong, Xinjun; Wang, Yang; Pu, Qianhui

    2016-04-01

    In order to obtain a finite element (FE) model that can more accurately describe structural behaviors, experimental data measured from the actual structure can be used to update the FE model. The process is known as FE model updating. In this paper, a frequency response function (FRF)-based model updating approach is presented. The approach attempts to minimize the difference between analytical and experimental FRFs, while the experimental FRFs are calculated using simultaneously measured dynamic excitation and corresponding structural responses. In this study, the FRF-based model updating method is validated through laboratory experiments on a four-story shear-frame structure. To obtain the experimental FRFs, shake table tests and impact hammer tests are performed. The FRF-based model updating method is shown to successfully update the stiffness, mass and damping parameters of the four-story structure, so that the analytical and experimental FRFs match well with each other.

  1. Updating systematic reviews: an international survey.

    Directory of Open Access Journals (Sweden)

    Chantelle Garritty

    Full Text Available BACKGROUND: Systematic reviews (SRs should be up to date to maintain their importance in informing healthcare policy and practice. However, little guidance is available about when and how to update SRs. Moreover, the updating policies and practices of organizations that commission or produce SRs are unclear. METHODOLOGY/PRINCIPAL FINDINGS: The objective was to describe the updating practices and policies of agencies that sponsor or conduct SRs. An Internet-based survey was administered to a purposive non-random sample of 195 healthcare organizations within the international SR community. Survey results were analyzed using descriptive statistics. The completed response rate was 58% (n = 114 from across 26 countries with 70% (75/107 of participants identified as producers of SRs. Among responders, 79% (84/107 characterized the importance of updating as high or very-high and 57% (60/106 of organizations reported to have a formal policy for updating. However, only 29% (35/106 of organizations made reference to a written policy document. Several groups (62/105; 59% reported updating practices as irregular, and over half (53/103 of organizational respondents estimated that more than 50% of their respective SRs were likely out of date. Authors of the original SR (42/106; 40% were most often deemed responsible for ensuring SRs were current. Barriers to updating included resource constraints, reviewer motivation, lack of academic credit, and limited publishing formats. Most respondents (70/100; 70% indicated that they supported centralization of updating efforts across institutions or agencies. Furthermore, 84% (83/99 of respondents indicated they favoured the development of a central registry of SRs, analogous to efforts within the clinical trials community. CONCLUSIONS/SIGNIFICANCE: Most organizations that sponsor and/or carry out SRs consider updating important. Despite this recognition, updating practices are not regular, and many organizations lack

  2. Airborne Network Optimization with Dynamic Network Update

    Science.gov (United States)

    2015-03-26

    AIRBORNE NETWORK OPTIMIZATION WITH DYNAMIC NETWORK UPDATE THESIS Bradly S. Paul, Capt, USAF AFIT-ENG-MS-15-M-030 DEPARTMENT OF THE AIR FORCE AIR...to copyright protection in the United States. AFIT-ENG-MS-15-M-030 AIRBORNE NETWORK OPTIMIZATION WITH DYNAMIC NETWORK UPDATE THESIS Presented to the...NETWORK OPTIMIZATION WITH DYNAMIC NETWORK UPDATE Bradly S. Paul, B.S.C.P. Capt, USAF Committee Membership: Maj Thomas E. Dube Chair Dr. Kenneth M. Hopkinson

  3. Updates

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    Chinese Academy of Social Sciences released the "China Industry Competitiveness Report (2012) NO.2", Guo Chaoxian, deputy director of Industrial Organization Office of Academy of Social Sciences Institute of Industrial Economics, said that textile and garmentindustry was China's most competitive industries, product market share ranked the second in the world, while productivity was 14 times of the United States. Guo Chaoxian noted that China's textile and garment industry was the most competitive national industry, no matter in terms of international market share, trade competitiveness index, the real index of comparative advantage, all were regarded as the strongest in the world. China's textile and garment industry's market share came in the second in the world, six times of Italy, seven times of Germany and twelve times of the United States.

  4. Updates

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    China's middle and low textile export situation remains grim. India's ban on cotton exports is to improve the competitiveness of the terminal textiles in the international market. In recent years, India has become the opponent of the Chinese textile exports in the international market, especially in the low-end textiles. India relies on the advantages of raw material and labor cost to continue to erode China's international market share. Though the overall technical level of the domestic textile industry and transport conditions are not as good as China, its current price advantage pose a large threat to China's low-end textile and garment exports.

  5. Updates

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    2011 Chinese online shopping industry continues the momentum of rapid development in 2010, gradually narrowing the gap of the online shopping environment in the region, online shopping growth in some of the second and third tier provinces performed outstandingly. According to the iResearch ECPlus monitoring data,

  6. An update on chemistry analyzers.

    Science.gov (United States)

    Vap, L M; Mitzner, B

    1996-09-01

    This update of six chemistry analyzers available to the clinician discusses several points that should be considered prior to the purchase of equipment. General topics include how to best match an instrument to clinic needs and the indirect costs associated with instrument operation. Quality assurance recommendations are discussed and common terms are defined. Specific instrument features, principles of operation, performance, and costs are presented. The information provided offers potential purchasers an objective approach to the evaluation of a chemistry analyzer for the veterinary clinic.

  7. Update on biosimilars in rheumatology.

    Science.gov (United States)

    Rischin, Adam; Östör, Andrew J K

    2017-04-01

    Biologic agents have become indispensable in the management of autoimmune disease particularly rheumatological conditions. The lives of countless individuals have been improved following treatment with these drugs. Unfortunately, their cost prohibits more widespread use around the globe. This critical issue has been addressed by the introduction of biosimilars into the market. These therapies have been developed to resemble the originator molecule as closely as possible and to increase competition in the therapy area thus allowing costs to be reduced. Our review is intended to offer an update on biosimilars including logistic considerations on their introduction into routine practice.

  8. Los Alamos Climatology 2016 Update

    Energy Technology Data Exchange (ETDEWEB)

    Bruggeman, David Alan [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2017-02-10

    The Los Alamos National Laboratory (LANL or the Laboratory) operates a meteorology monitoring network to support LANL emergency response, engineering designs, environmental compliance, environmental assessments, safety evaluations, weather forecasting, environmental monitoring, research programs, and environmental restoration. Weather data has been collected in Los Alamos since 1910. Bowen (1990) provided climate statistics (temperature and precipitation) for the 1961– 1990 averaging period, and included other analyses (e.g., wind and relative humidity) based on the available station locations and time periods. This report provides an update to the 1990 publication Los Alamos Climatology (Bowen 1990).

  9. Primary Anorectal Melanoma: An Update

    Directory of Open Access Journals (Sweden)

    P Carcoforo, M.T Raiji, G.M Palini, M Pedriali, U Maestroni, G Soliani, A Detroia, M.V Zanzi, A.L Manna, J.G Crompton, R.C Langan, A Stojadinovic, I Avital

    2012-01-01

    Full Text Available The anorectum is a rare anatomic location for primary melanoma. Mucosal melanoma is a distinct biological and clinical entity from the more common cutaneous melanoma. It portrays worse prognosis than cutaneous melanoma, with distant metastases being the overwhelming cause of morbidity and mortality. Surgery is the treatment of choice, but significant controversy exists over the extent of surgical resection. We present an update on the state of the art of anorectal mucosal melanoma. To illustrate the multimodality approach to anorectal melanoma, we present a typical patient.

  10. Communication technology update and fundamentals

    CERN Document Server

    Grant, August E

    2014-01-01

    A classic now in its 14th edition, Communication Technology Update and Fundamentals is the single best resource for students and professionals looking to brush up on how these technologies have developed, grown, and converged, as well as what's in store for the future. It begins by developing the communication technology framework-the history, ecosystem, and structure-then delves into each type of technology, including everything from mass media, to computers and consumer electronics, to networking technologies. Each chapter is written by faculty and industry experts who p

  11. Cushing syndrome: update on testing.

    Science.gov (United States)

    Raff, Hershel

    2015-03-01

    Endogenous hypercortisolism (Cushing syndrome) is one of the most enigmatic diseases in clinical medicine. The diagnosis and differential diagnosis of Cushing syndrome depend on proper laboratory evaluation. In this review, an update is provided on selected critical issues in the diagnosis and differential diagnosis of Cushing syndrome: the use of late-night salivary cortisol in initial diagnosis and for postoperative surveillance, and the use of prolactin measurement to improve the performance of inferior petrosal sinus sampling to distinguish Cushing disease from ectopic adrenocorticotropic hormone (ACTH) syndrome during differential diagnosis of ACTH-dependent Cushing syndrome. Copyright © 2015 Elsevier Inc. All rights reserved.

  12. Nordic MCL2 trial update

    DEFF Research Database (Denmark)

    Geisler, Christian H; Kolstad, Arne; Laurell, Anna

    2012-01-01

    Mantle cell lymphoma (MCL) is a heterogenic non-Hodgkin lymphoma entity, with a median survival of about 5 years. In 2008 we reported the early - based on the median observation time of 4 years - results of the Nordic Lymphoma Group MCL2 study of frontline intensive induction immunochemotherapy...... and autologous stem cell transplantation (ASCT), with more than 60% event-free survival at 5 years, and no subsequent relapses reported. Here we present an update after a median observation time of 6·5 years. The overall results are still excellent, with median overall survival and response duration longer than...

  13. Model Updating Nonlinear System Identification Toolbox Project

    Data.gov (United States)

    National Aeronautics and Space Administration — ZONA Technology (ZONA) proposes to develop an enhanced model updating nonlinear system identification (MUNSID) methodology that utilizes flight data with...

  14. An Update on Planet Nine

    Science.gov (United States)

    Kohler, Susanna

    2016-07-01

    Whats the news coming from the research world on the search for Planet Nine? Read on for an update from a few of the latest studies.Artists illustration of Planet Nine, a hypothesized Neptune-sized planet orbiting in the distant reaches of our solar system. [Caltech/Robert Hurt]What is Planet Nine?In January of this year, Caltech researchers Konstantin Batygin and Mike Brown presented evidence of a distant ninth planet in our solar system. They predicted this planet to be of a mass and volume consistent with a super-Earth, orbiting on a highly eccentric pathwith a period of tens of thousands of years.Since Batygin and Browns prediction, scientists have been hunting for further signs of Planet Nine. Though we havent yet discovered an object matching its description, we have come up with new strategies for finding it, we set some constraints on where it might be, and we made some interesting theoretical predictions about its properties.Visualizations of the resonant orbits of the four longest-period Kuiper belt objects, depicted in a frame rotating with the mean angular velocity of Planet Nine. Planet Nines position is on the right (with the trace of possible eccentric orbits e=0.17 and e=0.4 indicated in red). [Malhotra et al 2016]Here are some of the newest constraints on Planet Nine from studies published just within the past two weeks.Resonant OrbitsRenu Malhotra (University of Arizonas Lunar and Planetary Laboratory) and collaborators present further evidence of the shaping of solar system orbits by the hypothetical Planet Nine. The authors point out that the four longest-period Kuiper belt objects (KBOs) have orbital periods close to integer ratios with each other. Could it be that these outer KBOs have become locked into resonant orbits with a distant, massive body?The authors find that a distant planet orbiting with a period of ~17,117 years and a semimajor axis ~665 AU would have N/1 and N/2 period ratios with these four objects. If this is correct, it

  15. Alternative energies. Updates on progress

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, German (ed.) [CIRCE - Centre of Research for Energy Resources and Consumption, Zaragoza (Spain)

    2013-07-01

    Presents fundamental and applied research of alternative energies. Address key pillars in the alternative energy field, such as: biomass energy, hydrogen energy, solar energy, wind energy, hydroelectric power, geothermal energy and their environmental implications, with the most updated progress. Includes the life cycle assessment and thermoeconomic analysis as tools for evaluating and optimising environmental and cost subjects. This book presents nine chapters based on fundamental and applied research of alternative energies. At the present time, the challenge is that technology has to come up with solutions that can provide environmentally friendly energy supply options that are able to cover the current world energy demand. Experts around the world are working on these issues for providing new solutions that will break the existing technological barriers. This book aims to address key pillars in the alternative energy field, such as: biomass energy, hydrogen energy, solar energy, wind energy, hydroelectric power, geothermal energy and their environmental implications, with the most updated progress for each pillar. It also includes the life cycle assessment (LCA) and thermoeconomic analysis (TA) as tools for evaluating and optimising environmental and cost subjects. Chapters are organized into fundamental research, applied research and future trends; and written for engineers, academic researches and scientists.

  16. Updated Peach Bottom Model for MELCOR 1.8.6: Description and Comparisons

    Energy Technology Data Exchange (ETDEWEB)

    Robb, Kevin R [ORNL

    2014-09-01

    A MELCOR 1.8.5 model of the Peach Bottom Unit 2 or 3 has been updated for MELCOR 1.8.6. Primarily, this update involved modification of the lower head modeling. Three additional updates were also performed. First, a finer nodalization of the containment wet well was employed. Second, the pressure differential used by the logic controlling the safety relief valve actuation was modified. Finally, an additional stochastic failure mechanism for the safety relief valves was added. Simulation results from models with and without the modifications were compared. All the analysis was performed by comparing key figures of merit from simulations of a long-term station blackout scenario. This report describes the model changes and the results of the comparisons.

  17. Operational modal analysis by updating autoregressive model

    Science.gov (United States)

    Vu, V. H.; Thomas, M.; Lakis, A. A.; Marcouiller, L.

    2011-04-01

    This paper presents improvements of a multivariable autoregressive (AR) model for applications in operational modal analysis considering simultaneously the temporal response data of multi-channel measurements. The parameters are estimated by using the least squares method via the implementation of the QR factorization. A new noise rate-based factor called the Noise rate Order Factor (NOF) is introduced for use in the effective selection of model order and noise rate estimation. For the selection of structural modes, an orderwise criterion called the Order Modal Assurance Criterion (OMAC) is used, based on the correlation of mode shapes computed from two successive orders. Specifically, the algorithm is updated with respect to model order from a small value to produce a cost-effective computation. Furthermore, the confidence intervals of each natural frequency, damping ratio and mode shapes are also computed and evaluated with respect to model order and noise rate. This method is thus very effective for identifying the modal parameters in case of ambient vibrations dealing with modern output-only modal analysis. Simulations and discussions on a steel plate structure are presented, and the experimental results show good agreement with the finite element analysis.

  18. MARMOT update for oxide fuel modeling

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Yongfeng [Idaho National Lab. (INL), Idaho Falls, ID (United States); Schwen, Daniel [Idaho National Lab. (INL), Idaho Falls, ID (United States); Chakraborty, Pritam [Idaho National Lab. (INL), Idaho Falls, ID (United States); Jiang, Chao [Idaho National Lab. (INL), Idaho Falls, ID (United States); Aagesen, Larry [Idaho National Lab. (INL), Idaho Falls, ID (United States); Ahmed, Karim [Idaho National Lab. (INL), Idaho Falls, ID (United States); Jiang, Wen [Idaho National Lab. (INL), Idaho Falls, ID (United States); Biner, Bulent [Idaho National Lab. (INL), Idaho Falls, ID (United States); Bai, Xianming [Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States); Tonks, Michael [Pennsylvania State Univ., University Park, PA (United States); Millett, Paul [Univ. of Arkansas, Fayetteville, AR (United States)

    2016-09-01

    This report summarizes the lower-length-scale research and development progresses in FY16 at Idaho National Laboratory in developing mechanistic materials models for oxide fuels, in parallel to the development of the MARMOT code which will be summarized in a separate report. This effort is a critical component of the microstructure based fuel performance modeling approach, supported by the Fuels Product Line in the Nuclear Energy Advanced Modeling and Simulation (NEAMS) program. The progresses can be classified into three categories: 1) development of materials models to be used in engineering scale fuel performance modeling regarding the effect of lattice defects on thermal conductivity, 2) development of modeling capabilities for mesoscale fuel behaviors including stage-3 gas release, grain growth, high burn-up structure, fracture and creep, and 3) improved understanding in material science by calculating the anisotropic grain boundary energies in UO$_2$ and obtaining thermodynamic data for solid fission products. Many of these topics are still under active development. They are updated in the report with proper amount of details. For some topics, separate reports are generated in parallel and so stated in the text. The accomplishments have led to better understanding of fuel behaviors and enhance capability of the MOOSE-BISON-MARMOT toolkit.

  19. An updated subgrid orographic parameterization for global atmospheric forecast models

    Science.gov (United States)

    Choi, Hyun-Joo; Hong, Song-You

    2015-12-01

    A subgrid orographic parameterization (SOP) is updated by including the effects of orographic anisotropy and flow-blocking drag (FBD). The impact of the updated SOP on short-range forecasts is investigated using a global atmospheric forecast model applied to a heavy snowfall event over Korea on 4 January 2010. When the SOP is updated, the orographic drag in the lower troposphere noticeably increases owing to the additional FBD over mountainous regions. The enhanced drag directly weakens the excessive wind speed in the low troposphere and indirectly improves the temperature and mass fields over East Asia. In addition, the snowfall overestimation over Korea is improved by the reduced heat fluxes from the surface. The forecast improvements are robust regardless of the horizontal resolution of the model between T126 and T510. The parameterization is statistically evaluated based on the skill of the medium-range forecasts for February 2014. For the medium-range forecasts, the skill improvements of the wind speed and temperature in the low troposphere are observed globally and for East Asia while both positive and negative effects appear indirectly in the middle-upper troposphere. The statistical skill for the precipitation is mostly improved due to the improvements in the synoptic fields. The improvements are also found for seasonal simulation throughout the troposphere and stratosphere during boreal winter.

  20. COMPASS: status update and long term development plan

    Science.gov (United States)

    Gratadour, D.; Ferreira, F.; Sevin, A.; Doucet, N.; Clénet, Y.; Gendron, E.; Lainé, M.; Vidal, F.; Brulé, J.; Puech, M.; Vérinaud, C.; Carlotti, A.

    2016-07-01

    The goal of the COMPASS project was to bring together the efforts of the actors from the French AO community (PHASE partnership), with the participation of the Maison de la Simulation, around the collaborative development of a numerical platform for AO, optimized and based on the use of graphics processing units (GPU). This platform allows today to lead the design studies of AO modules addressing all of the first generation instrumentation of the E-ELT. In this paper, we provide a status update of the platform and the long term maintenance and development plan.

  1. Update on Advection-Diffusion Purge Flow Model

    Science.gov (United States)

    Brieda, Lubos

    2015-01-01

    Gaseous purge is commonly used in sensitive spacecraft optical or electronic instruments to prevent infiltration of contaminants and/or water vapor. Typically, purge is sized using simplistic zero-dimensional models that do not take into account instrument geometry, surface effects, and the dependence of diffusive flux on the concentration gradient. For this reason, an axisymmetric computational fluid dynamics (CFD) simulation was recently developed to model contaminant infiltration and removal by purge. The solver uses a combined Navier-Stokes and Advection-Diffusion approach. In this talk, we report on updates in the model, namely inclusion of a particulate transport model.

  2. Modelling and Simulation: An Overview

    NARCIS (Netherlands)

    M.J. McAleer (Michael); F. Chan (Felix); L. Oxley (Les)

    2013-01-01

    textabstractThe papers in this special issue of Mathematics and Computers in Simulation cover the following topics: improving judgmental adjustment of model-based forecasts, whether forecast updates are progressive, on a constrained mixture vector autoregressive model, whether all estimators are bor

  3. Efficient compensation handling via subjective updates

    NARCIS (Netherlands)

    J. Dedeić (Jovana); J. Pantović (Jovanka); J.A. Pérez Parra (Jorge)

    2017-01-01

    textabstractProgramming abstractions for compensation handling and dynamic update are crucial in specifying reliable interacting systems, such as Collective Adaptive Systems (CAS). Compensations and updates both specify how a system reacts in response to exceptional events. Prior work showed that

  4. 76 FR 22618 - Product List Update

    Science.gov (United States)

    2011-04-22

    ... From the Federal Register Online via the Government Publishing Office ] POSTAL REGULATORY COMMISSION 39 CFR Part 3020 Product List Update AGENCY: Postal Regulatory Commission. ACTION: Final rule. SUMMARY: The Commission is updating the postal product lists. This action reflects the disposition of...

  5. Non-Linear Approximation of Bayesian Update

    KAUST Repository

    Litvinenko, Alexander

    2016-06-23

    We develop a non-linear approximation of expensive Bayesian formula. This non-linear approximation is applied directly to Polynomial Chaos Coefficients. In this way, we avoid Monte Carlo sampling and sampling error. We can show that the famous Kalman Update formula is a particular case of this update.

  6. 10 CFR 26.57 - Authorization update.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 1 2010-01-01 2010-01-01 false Authorization update. 26.57 Section 26.57 Energy NUCLEAR REGULATORY COMMISSION FITNESS FOR DUTY PROGRAMS Granting and Maintaining Authorization § 26.57 Authorization update. (a) Before granting authorization to an individual whose authorization has been interrupted...

  7. 34 CFR 668.55 - Updating information.

    Science.gov (United States)

    2010-07-01

    ... 34 Education 3 2010-07-01 2010-07-01 false Updating information. 668.55 Section 668.55 Education... Information § 668.55 Updating information. (a)(1) Unless the provisions of paragraph (a)(2) or (a)(3) of this... applicant to verify the information contained in his or her application for assistance in an award year...

  8. Census in Schools Educator Update, March 2009

    Science.gov (United States)

    US Census Bureau, 2009

    2009-01-01

    The "Census in Schools Educator Update" is sent to educators and educational organizations periodically to keep them informed about current and upcoming census data and to provide ideas about how to use data in the classroom. This issue of the "Census in Schools Educator Update" newsletter focuses on the following topics: (1)…

  9. Better Plants Progress Update Fall 2013

    Energy Technology Data Exchange (ETDEWEB)

    none,

    2013-09-23

    This Progress Update summarizes the significant energy saving achievements and cumulative cost savings made by these industry leaders from 2010-2012. The update also shares the plans and priorities over the next year for the Better Plants Program to continue to advance energy efficiency in the industrial sector.

  10. Timing interactions in social simulations: The voter model

    CERN Document Server

    Fernández-Gracia, Juan; Miguel, Maxi San

    2013-01-01

    The recent availability of huge high resolution datasets on human activities has revealed the heavy-tailed nature of the interevent time distributions. In social simulations of interacting agents the standard approach has been to use Poisson processes to update the state of the agents, which gives rise to very homogeneous activity patterns with a well defined characteristic interevent time. As a paradigmatic opinion model we investigate the voter model and review the standard update rules and propose two new update rules which are able to account for heterogeneous activity patterns. For the new update rules each node gets updated with a probability that depends on the time since the last event of the node, where an event can be an update attempt (exogenous update) or a change of state (endogenous update). We find that both update rules can give rise to power law interevent time distributions, although the endogenous one more robustly. Apart from that for the exogenous update rule and the standard update rules...

  11. Situation Update: Summary of Weekly FluView

    Science.gov (United States)

    ... Seasonal Avian Swine/Variant Pandemic Other Get Email Updates To receive email updates about this page, enter ... Submit What's this? Submit Button Past Newsletters Situation Update: Summary of Weekly FluView Report Language: English Españ ...

  12. Evolution of Word-updating Dynamical Systems (WDS) on Directed Graphs

    Institute of Scientific and Technical Information of China (English)

    ZHENG Jie

    2009-01-01

    This paper continues the research on theoretical foundations for computer simulation. We introduce the concept of word-updating dynamical systems (WDS) on directed graphs, which is a kind of generalization of sequential dynamical systems (SDS) on graphs. Some properties on WDS, especially some results on NOR -WDS,which are different from that on NOR -SDS, are obtained.

  13. SPHINX v 1.1 Monte Carlo Program for Polarized Nucleon-Nucleon Collisions (update)

    CERN Document Server

    Güllenstern, S; Górnicki, P; Mankiewicz, L; Schäfer, A; Güllenstern, Stefan; Martin, Oliver; Gornicki, Pawel; Mankiewicz, Lech; Schäfer, Andreas

    1996-01-01

    We present the updated long write-up for version 1.1 of the SPHINX Monte Carlo. The program can be used to simulate polarized nucleon - nucleon collisions at high energies. Spins of colliding particles are taken into account. The program allows the calculation of cross sections for various processes.

  14. MODELING THE EFFECTS OF UPDATING THE INFLUENZA VACCINE ON THE EFFICACY OF REPEATED VACCINATION.

    Energy Technology Data Exchange (ETDEWEB)

    D. SMITH; A. LAPEDES; ET AL

    2000-11-01

    The accumulated wisdom is to update the vaccine strain to the expected epidemic strain only when there is at least a 4-fold difference [measured by the hemagglutination inhibition (HI) assay] between the current vaccine strain and the expected epidemic strain. In this study we investigate the effect, on repeat vaccines, of updating the vaccine when there is a less than 4-fold difference. Methods: Using a computer model of the immune response to repeated vaccination, we simulated updating the vaccine on a 2-fold difference and compared this to not updating the vaccine, in each case predicting the vaccine efficacy in first-time and repeat vaccines for a variety of possible epidemic strains. Results: Updating the vaccine strain on a 2-fold difference resulted in increased vaccine efficacy in repeat vaccines compared to leaving the vaccine unchanged. Conclusions: These results suggest that updating the vaccine strain on a 2-fold difference between the existing vaccine strain and the expected epidemic strain will increase vaccine efficacy in repeat vaccines compared to leaving the vaccine unchanged.

  15. Self-Position Update For Geographic Routing For Mobile Ad Hoc Networks

    Directory of Open Access Journals (Sweden)

    G.PRAVEEN

    2013-06-01

    Full Text Available In geographic routing nodes will periodic broadcasting the beacon packet to their neighboring nodes at a equal interval of time that beacon packet contain the nodes present geographic location, but in this process it will increase the update cost and performance of the router will be also will be low. To eliminate this problem we propose this Self-Position Update. SPU works on two principles: (i nodes whose movements are harder to predict update their positions more frequently (and vice versa, (ii nodes which are static and closer to the forwarded path update their position more frequently (and vice versa. Our theoretical analysis, which is validated by NS2 simulations of a well known geographic routing protocol, (DSR Protocol, shows that SPU can significantly reduce the update cost and improve the routing performance in terms of packet delivery ratio and average end-to-end delay in comparison with periodic beaconing and other recently proposed updating schemes. The benefits of SPU are further confirmed by undertaking evaluations in realistic network scenarios, which account for localization error, realistic radio propagation and sparse network.

  16. Updated Starshade Technology Gap List

    Science.gov (United States)

    Crill, Brendan P.; Siegler, Nicholas

    2017-01-01

    NASA's Exoplanet Exploration Program (ExEP) guides the development of technology that enables the direct imaging and characterization of exo-Earths in the habitable zone of their stars, for future space observatories. Here we present the Starshade portion of the 2017 ExEP Enabling Technology Gap List, an annual update to ExEP's list of of technology to be advanced in the next 1-5 years. A Starshade is an external occulter on an independent spacecraft, allowing a space telescope to achieve exo-Earth imaging contrast requirements by blocking starlight before it enters the telescope. Building and operating a Starshade requires new technology: the occulter is a structure tens of meters in diameter that must be positioned precisely at a distance of tens of thousands of kilometers from the telescope. We review the current state-of-the-art performance and the performance level that must be achieved for a Starshade.

  17. [An update on Lassa virus].

    Science.gov (United States)

    Leparc-Goffart, I; Emonet, S F

    2011-12-01

    Lassa virus, the etiologic agent of Lassa hemorrhagic fever, infects 100,000 to 300,000 people every year in West Africa with an overall mortality rate ranging from 1 to 2%. It was discovered in 1969 and remains a significant public health risk in endemic areas. Because airborne transmission is possible and mortality can be high under certain conditions, Lassa virus has been classified as a category A bioterrorism agent. Early diagnosis is difficult due to insidious non-specific onset and to the great genetic divergence of the virus that makes RT-PCR assays unreliable. The lack of proper diagnostic tools promotes nosocomial infection and diminishes the efficacy of treatment. Recently, numerous advances have been made in the development of both diagnostic and vaccination techniques. The purpose of this review is to present an update on that research as well as the current epidemiology of Lassa virus.

  18. Update in pulmonary arterial hypertension.

    Science.gov (United States)

    Mejía Chew, C R; Alcolea Batres, S; Ríos Blanco, J J

    2016-11-01

    Pulmonary arterial hypertension is a rare and progressive disease that mainly affects the pulmonary arterioles (precapillary), regardless of the triggering aetiology. The prevalence of pulmonary hypertension and pulmonary arterial hypertension in Spain is estimated at 19.2 and 16 cases per million inhabitants, respectively. The diagnosis of pulmonary arterial hypertension is based on haemodynamic criteria (mean pulmonary artery pressure ≥25mmHg, pulmonary capillary wedge pressure ≤15mmHg and pulmonary vascular resistance >3 Wood units) and therefore requires the implementation of right cardiac catheterisation. Sequential therapy with a single drug has been used in clinical practice. However, recent European guidelines recommend combined initial therapy in some situations. This review conducts a critical update of our knowledge of this disease according to the latest guidelines and recommendations.

  19. Sepsis: An update in management.

    Science.gov (United States)

    Galen, Benjamin T; Sankey, Christopher

    2015-11-01

    Hospitalists are a critical link in providing evidence-based care for patients with sepsis across the disease spectrum, from early recognition to recovery. The past decade of sepsis research has led to significant findings that will change clinical practice for hospital medicine practitioners. Although the incidence of severe sepsis in the United States has continued to rise, in-hospital mortality has declined. Management of the spectrum of sepsis disorders is no longer restricted to the intensive care unit (ICU). This review article will provide an update in the management of sepsis for hospitalists based on recently published pivotal studies. The expanding evidence base in sepsis includes early goal-directed therapy/clinical endpoints/sepsis bundles, antibiotics and source control, volume resuscitation, ICU considerations (including the use of insulin and corticosteroids), mortality/complications, and the newly recognized condition of "sepsis survivorship".

  20. Office Operative Hysteroscopy - an Update.

    Science.gov (United States)

    Salazar, Christina Alicia; Isaacson, Keith

    2017-08-10

    Hysteroscopy is considered the gold standard for evaluation of intracavitary pathology associated with both pre- and postmenopausal patients with abnormal uterine bleeding as well as part of the evaluation of infertility patients with suspected cavity abnormalities. Office-based operative hysteroscopy allows patients to resume activities immediately and successfully integrates clinical practice into a "see and treat" modality, avoiding the added risks of undergoing anesthesia and the inconvenience of going to the operating room. For 2017, the Center for Medicare and Medical Services has incorporated a substantial increase in the reimbursement for a select number of office-based hysteroscopic procedures. This review provides an update on office hysteroscopy indications, equipment, and procedures as well as reviews management of complications that may arise within an office-based practice. Copyright © 2017. Published by Elsevier Inc.

  1. [Antiphospholipid syndrome diagnosis: an update].

    Science.gov (United States)

    Visseaux, Benoit; Masliah-Planchon, Julien; Fischer, Anne-Marie; Darnige, Luc

    2011-01-01

    The antiphospholipid syndrome (APS) is characterized by arterial and/or venous thrombosis and pregnancy morbidity in association with the persistent presence of autoantibodies called antiphospholipid antibodies (APAs). APAs are a heterogeneous group of circulating autoantibodies that can be detected either by phospholipid-dependent coagulation test for lupus anticoagulant (LA) or ELISA test for anticardiolipin and anti-β2GPI antibodies. In 2006, the revised criteria for the diagnosis of APS introduce the anti-β2GPI antibodies as a new biological criterion and highlight the necessity to increase the interval between two positive APA test from 6 to 12 weeks. However, despite these updated criteria, the diagnosis of APS remains challenging and we proposed here to make an overview of the latest evolution in the diagnosis of this syndrome.

  2. Malnutrition and infection: an update.

    Science.gov (United States)

    Solomons, Noel W

    2007-10-01

    The original Scrimshaw, Taylor and Gordon conceptual framework for the interaction of nutrition and infection has well served the scientific community for almost half a century. At its core is the notion of synergistic (mutually reinforcing) and antagonistic (mutually nullifying) influences of the malnourished state on infectious conditions and vice versa. Research on a series of advancing fronts, however, has allowed the incorporation of both relevant public health issues (parasitosis, emerging infectious diseases, obesity and overweight, etc.) and advancing science (molecular immunology, oxidation biology, multiple micronutrient deficiencies, etc.). The present review is an interpretative update on close to 50 years of demographic and epidemiological evolution in the field of human nutrition and the implications for the interaction in the context of microbiological and immunological developments on the infectious side of the dialectic.

  3. An Update on Radio Supernovae

    Science.gov (United States)

    van Dyk, Schuyler D.; Sramek, Richard A.; Weiler, Kurt W.; Montes, Marcos J.; Panagia, Nino

    The radio emission from supernovae (SNe) is nonthermal synchrotron radiation of high brightness temperature, with a ``turn-on'' delay at longer wavelengths, power-law decline after maximum with index beta, and spectral index alpha asymptotically decreasing with time to a final, optically thin value. Radio supernovae (RSNe) are best described by the Chevalier (1982) ``mini-shell'' model, with modifications by Weiler \\etal\\ (1990). RSNe observations provide a valuable probe of the SN circumstellar environment and constraints on progenitor masses. We present a progress report on a number of recent RSNe, as well as on new behavior from RSNe 1979C and 1980K, and on RSNe as potential distance indicators. In particular, we present updated radio light curves for SN 1993J in M81.

  4. Coronary microvascular dysfunction: an update

    Science.gov (United States)

    Crea, Filippo; Camici, Paolo G.; Bairey Merz, Cathleen Noel

    2014-01-01

    Many patients undergoing coronary angiography because of chest pain syndromes, believed to be indicative of obstructive atherosclerosis of the epicardial coronary arteries, are found to have normal angiograms. In the past two decades, a number of studies have reported that abnormalities in the function and structure of the coronary microcirculation may occur in patients without obstructive atherosclerosis, but with risk factors or with myocardial diseases as well as in patients with obstructive atherosclerosis; furthermore, coronary microvascular dysfunction (CMD) can be iatrogenic. In some instances, CMD represents an epiphenomenon, whereas in others it is an important marker of risk or may even contribute to the pathogenesis of cardiovascular and myocardial diseases, thus becoming a therapeutic target. This review article provides an update on the clinical relevance of CMD in different clinical settings and also the implications for therapy. PMID:24366916

  5. Sprucing up the site - update

    CERN Multimedia

    2009-01-01

    As mentioned in a previous article the Bulletin will be publishing regular short updates following the consolidation work going on around the CERN sites: All internal lighting is being replaced in the office buildings on the Prevessin site. Work has started in building 866 and will move to 864 and 865 later. New energy-efficient lights are being installed, which will reduce electricity consumption by 30 -50%, and in the common areas like corridors the lighting will be switched on by motion sensors. Also in the Prevessin site, the lines in the car parks are being repainted. This will continue in the Meyrin site later. Work has started in Building 30 to completely refurbish the AT Auditorium.

  6. User's guide to the MESOI diffusion model and to the utility programs UPDATE and LOGRVU

    Energy Technology Data Exchange (ETDEWEB)

    Athey, G.F.; Allwine, K.J.; Ramsdell, J.V.

    1981-11-01

    MESOI is an interactive, Lagrangian puff trajectory diffusion model. The model is documented separately (Ramsdell and Athey, 1981); this report is intended to provide MESOI users with the information needed to successfully conduct model simulations. The user is also provided with guidance in the use of the data file maintenance and review programs; UPDATE and LOGRVU. Complete examples are given for the operaton of all three programs and an appendix documents UPDATE and LOGRVU.

  7. A New Strategy to Improve Proactive Route Updates in Mobile Ad Hoc Networks

    Directory of Open Access Journals (Sweden)

    Abolhasan Mehran

    2005-01-01

    Full Text Available This paper presents two new route update strategies for performing proactive route discovery in mobile ad hoc networks (MANETs. The first strategy is referred to as minimum displacement update routing (MDUR. In this strategy, the rate at which route updates are sent into the network is controlled by how often a node changes its location by a required distance. The second strategy is called minimum topology change update (MTCU. In this strategy, the route updating rate is proportional to the level of topology change each node experiences. We implemented MDUR and MTCU on top of the fisheye state routing (FSR protocol and investigated their performance by simulation. The simulations were performed in a number of different scenarios, with varied network mobility, density, traffic, and boundary. Our results indicate that both MDUR and MTCU produce significantly lower levels of control overhead than FSR and achieve higher levels of throughput as the density and the level of traffic in the network are increased.

  8. Buffer Management Simulation in ATM Networks

    Science.gov (United States)

    Yaprak, E.; Xiao, Y.; Chronopoulos, A.; Chow, E.; Anneberg, L.

    1998-01-01

    This paper presents a simulation of a new dynamic buffer allocation management scheme in ATM networks. To achieve this objective, an algorithm that detects congestion and updates the dynamic buffer allocation scheme was developed for the OPNET simulation package via the creation of a new ATM module.

  9. Buffer Management Simulation in ATM Networks

    Science.gov (United States)

    Yaprak, E.; Xiao, Y.; Chronopoulos, A.; Chow, E.; Anneberg, L.

    1998-01-01

    This paper presents a simulation of a new dynamic buffer allocation management scheme in ATM networks. To achieve this objective, an algorithm that detects congestion and updates the dynamic buffer allocation scheme was developed for the OPNET simulation package via the creation of a new ATM module.

  10. Precipitation and Runoff Simulations of the Carson Range and Pine Nut Mountains, and Updated Estimates of Ground-Water Inflow and the Ground-Water Budgets for Basin-Fill Aquifers of Carson Valley, Douglas County, Nevada, and Alpine County, California

    Science.gov (United States)

    Jeton, Anne E.; Maurer, Douglas K.

    2007-01-01

    Recent estimates of ground-water inflow to the basin-fill aquifers of Carson Valley, Nevada, and California, from the adjacent Carson Range and Pine Nut Mountains ranged from 22,000 to 40,000 acre-feet per year using water-yield and chloride-balance methods. In this study, watershed models were developed for watersheds with perennial streams and for watersheds with ephemeral streams in the Carson Range and Pine Nut Mountains to provide an independent estimate of ground-water inflow. This report documents the development and calibration of the watershed models, presents model results, compares the results with recent estimates of ground-water inflow to the basin-fill aquifers of Carson Valley, and presents updated estimates of the ground-water budget for basin-fill aquifers of Carson Valley. The model used for the study was the Precipitation-Runoff Modeling System, a physically based, distributed-parameter model designed to simulate precipitation and snowmelt runoff as well as snowpack accumulation and snowmelt processes. Geographic Information System software was used to manage spatial data, characterize model drainages, and to develop Hydrologic Response Units. Models were developed for * Two watersheds with gaged perennial streams in the Carson Range and two watersheds with gaged perennial streams in the Pine Nut Mountains using measured daily mean runoff, * Ten watersheds with ungaged perennial streams using estimated daily mean runoff, * Ten watershed with ungaged ephemeral streams in the Carson Range, and * A large area of ephemeral runoff near the Pine Nut Mountains. Models developed for the gaged watersheds were used as index models to guide the calibration of models for ungaged watersheds. Model calibration was constrained by daily mean runoff for 4 gaged watersheds and for 10 ungaged watersheds in the Carson Range estimated in a previous study. The models were further constrained by annual precipitation volumes estimated in a previous study to provide

  11. Updating Recursive XML Views of Relations

    Institute of Scientific and Technical Information of China (English)

    Byron Choi; Gao Cong; Wenfei Fan; Stratis D. Viglas

    2008-01-01

    This paper investigates the view update problem for XML views published from relational data. We consider XML views defined in terms of mappings directed by possibly recursive DTDs compressed into DAGs and stored in relations.We provide new techniques to efficiently support XML view updates specified in terms of Xpath expressions with recursion and complex filters. The interaction between Xpath recursion and DAG compression of XML views makes the analysis of the XML view update problem rather intriguing. Furthermore, many issues are still open even for relational view updates,and need to be explored. In response to these, on the XML side, we revise the notion of side effects and update semantics based on the semantics of XML views, and present efficient algorithms to translate XML updates to relational view updates.On the relational side, we propose a mild condition on SPJ views, and show that under this condition the analysis of deletions on relational views becomes PTIME while the insertion analysis is NP-complete. We develop an efficient algorithm to process relational view deletions, and a heuristic algorithm to handle view insertions. Finally, we present an experimental study to verify the effectiveness of our techniques.

  12. Dynamic Model Updating Using Virtual Antiresonances

    Directory of Open Access Journals (Sweden)

    Walter D’Ambrogio

    2004-01-01

    Full Text Available This paper considers an extension of the model updating method that minimizes the antiresonance error, besides the natural frequency error. By defining virtual antiresonances, this extension allows the use of previously identified modal data. Virtual antiresonances can be evaluated from a truncated modal expansion, and do not correspond to any physical system. The method is applied to the Finite Element model updating of the GARTEUR benchmark, used within an European project on updating. Results are compared with those previously obtained by estimating actual antiresonances after computing low and high frequency residuals, and with results obtained by using the correlation (MAC between identified and analytical mode shapes.

  13. Progressive collapse analysis using updated models for alternate path analysis after a blast

    Science.gov (United States)

    Eskew, Edward; Jang, Shinae; Bertolaccini, Kelly

    2016-04-01

    Progressive collapse is of rising importance within the structural engineering community due to several recent cases. The alternate path method is a design technique to determine the ability of a structure to sustain the loss of a critical element, or elements, and still resist progressive collapse. However, the alternate path method only considers the removal of the critical elements. In the event of a blast, significant damage may occur to nearby members not included in the alternate path design scenarios. To achieve an accurate assessment of the current condition of the structure after a blast or other extreme event, it may be necessary to reduce the strength or remove additional elements beyond the critical members designated in the alternate path design method. In this paper, a rapid model updating technique utilizing vibration measurements is used to update the structural model to represent the real-time condition of the structure after a blast occurs. Based upon the updated model, damaged elements will either have their strength reduced, or will be removed from the simulation. The alternate path analysis will then be performed, but only utilizing the updated structural model instead of numerous scenarios. After the analysis, the simulated response from the analysis will be compared to failure conditions to determine the buildings post-event condition. This method has the ability to incorporate damage to noncritical members into the analysis. This paper will utilize numerical simulations based upon a unified facilities criteria (UFC) example structure subjected to an equivalent blast to validate the methodology.

  14. Improved Lunar and Martian Regolith Simulant Production Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The technical objective of the Phase II project is to provide a more complete investigation of the long-term needs of the simulant community based on the updated...

  15. System Oriented Runway Management: A Research Update

    Science.gov (United States)

    Lohr, Gary W.; Brown, Sherilyn A.; Stough, Harry P., III; Eisenhawer, Steve; Atkins, Stephen; Long, Dou

    2011-01-01

    The runway configuration used by an airport has significant implications with respect to its capacity and ability to effectively manage surface and airborne traffic. Aircraft operators rely on runway configuration information because it can significantly affect an airline's operations and planning of their resources. Current practices in runway management are limited by a relatively short time horizon for reliable weather information and little assistance from automation. Wind velocity is the primary consideration when selecting a runway configuration; however when winds are below a defined threshold, discretion may be used to determine the configuration. Other considerations relevant to runway configuration selection include airport operator constraints, weather conditions (other than winds) traffic demand, user preferences, surface congestion, and navigational system outages. The future offers an increasingly complex landscape for the runway management process. Concepts and technologies that hold the potential for capacity and efficiency increases for both operations on the airport surface and in terminal and enroute airspace are currently under investigation. Complementary advances in runway management are required if capacity and efficiency increases in those areas are to be realized. The System Oriented Runway Management (SORM) concept has been developed to address this critical part of the traffic flow process. The SORM concept was developed to address all aspects of runway management for airports of varying sizes and to accommodate a myriad of traffic mixes. SORM, to date, addresses the single airport environment; however, the longer term vision is to incorporate capabilities for multiple airport (Metroplex) operations as well as to accommodate advances in capabilities resulting from ongoing research. This paper provides an update of research supporting the SORM concept including the following: a concept of overview, results of a TRCM simulation, single

  16. Updating neutrino magnetic moment constraints

    CERN Document Server

    Canas, B C; Parada, A; Tortola, M; Valle, J W F

    2015-01-01

    In this paper we provide an updated analysis of the neutrino magnetic moments (NMMs), discussing both the constraints on the magnitudes of the three transition moments Lambda_i as well as the role of the CP violating phases present both in the mixing matrix and in the NMM matrix. The scattering of solar neutrinos off electrons in Borexino provides the most stringent restrictions, due to its robust statistics and the low energies observed, below 1 MeV. Our new limit on the effective neutrino magnetic moment which follows from the most recent Borexino data is 3.1 x 10^-11 mu_B at 90% C.L. This corresponds to the individual transition magnetic moment constraints: |Lambda_1| < 5.6 x10^-11 mu_B, |Lambda_2| < 4.0 x 10^-11 mu_B, and |Lambda_3| < 3.1 x 10^-11 mu_B (90% C.L.), irrespective of any complex phase. Indeed, the incoherent admixture of neutrino mass eigenstates present in the solar flux makes Borexino insensitive to the Majorana phases present in the NMM matrix. For this reason we also provide a gl...

  17. CONSULTATION ON UPDATED METHODOLOGY FOR ...

    Science.gov (United States)

    The National Academy of Sciences (NAS) expects to publish the Biological Effects of Ionizing Radiation (BEIR) committee's report (BEIR VII) on risks from ionizing radiation exposures in calendar year 2005. The committee is expected to have analyzed the most recent epidemiology from the important exposed cohorts and to have factored in any changes resulting from the updated analysis of dosimetry for the Japanese atomic bomb survivors. To the extent practical, the Committee will also consider any relevant radiobiological data, including those from the Department of Energy's low dose effects research program. Based on their evaluation of relevant information, the Committee is then expected to propose a set of models for estimating risks from low-dose ionizing radiation. ORIA will review the BEIR VII report and consider revisions to the Agency's methodology for estimating cancer risks from exposure to ionizing radiation in light of this report and other relevant information. This will be the subject of the Consultation. This project supports a major risk management initiative to improve the basis on which radiation risk decisions are made. This project, funded by several Federal Agencies, reflects an attempt to characterize risks where there are substantial uncertainties. The outcome will improve our ability to assess risks well into the future and will strengthen EPAs overall capability for assessing and managing radiation risks. the BEIR VII report is funde

  18. Stuttering: Clinical and research update.

    Science.gov (United States)

    Perez, Hector R; Stoeckle, James H

    2016-06-01

    To provide an update on the epidemiology, genetics, pathophysiology, diagnosis, and treatment of developmental stuttering. The MEDLINE and Cochrane databases were searched for past and recent studies on the epidemiology, genetics, pathophysiology, diagnosis, and treatment of developmental stuttering. Most recommendations are based on small studies, limited-quality evidence, or consensus. Stuttering is a speech disorder, common in persons of all ages, that affects normal fluency and time patterning of speech. Stuttering has been associated with differences in brain anatomy, functioning, and dopamine regulation thought to be due to genetic causes. Attention to making a correct diagnosis or referral in children is important because there is growing consensus that early intervention with speech therapy for children who stutter is critical. For adults, stuttering can be associated with substantial psychosocial morbidity including social anxiety and low quality of life. Pharmacologic treatment has received attention in recent years, but clinical evidence is limited. The mainstay of treatment for children and adults remains speech therapy. A growing body of research has attempted to uncover the pathophysiology of stuttering. Referral for speech therapy remains the best option for children and adults. Copyright© the College of Family Physicians of Canada.

  19. IDSA releases updated coccidioidomycosis guidelines

    Directory of Open Access Journals (Sweden)

    Robbins RA

    2016-09-01

    Full Text Available No abstract available. Article truncated at 150 words. The Infectious Diseases Society of America (IDSA has released updated Guidelines for the Treatment of Coccidioidomycosis, also known as cocci or Valley Fever (1. Coccidioidomycosis is a fungal infection endemic to the southwestern United States and a common cause of pneumonia and pulmonary nodules in this area. However, the infection can disseminate systemically especially in immunocompromised hosts and certain ethnic populations resulting in a variety of pulmonary and extrapulmonary complications. In addition to recommendations for these complications, the new guidelines address management of special at-risk populations, preemptive management strategies in at-risk populations and after unintentional laboratory exposure. The guidelines also suggest shorter courses of antibiotics for hospitalized patients and more ambulatory treatment for most individuals who have contracted Valley Fever. The panel was led by John N. Galgiani, MD, director of the Valley Fever Center for Excellence at the University of Arizona Health Sciences. Galgiani led a panel of 16 ...

  20. Extraglottic airway devices: technology update

    Directory of Open Access Journals (Sweden)

    Sharma B

    2017-08-01

    Full Text Available Bimla Sharma, Chand Sahai, Jayashree Sood Department of Anaesthesiology, Pain and Perioperative Medicine, Sir Ganga Ram Hospital, New Delhi, India Abstract: Extraglottic airway devices (EADs have revolutionized the field of airway management. The invention of the laryngeal mask airway was a game changer, and since then, there have been several innovations to improve the EADs in design, functionality, safety and construction material. These have ranged from changes in the shape of the mask, number of cuffs and material used, like rubber, polyvinylchloride and latex. Phthalates, which were added to the construction material in order to increase device flexibility, were later omitted when this chemical was found to have serious adverse reproductive outcomes. The various designs brought out by numerous companies manufacturing EADs resulted in the addition of several devices to the airway market. These airway devices were put to use, many of them with inadequate or no evidence base regarding their efficacy and safety. To reduce the possibility of compromising the safety of the patient, the Difficult Airway Society (DAS formed the Airway Device Evaluation Project Team (ADEPT to strengthen the evidence base for airway equipment and vet the new extraglottic devices. A preuse careful analysis of the design and structure may help in better understanding of the functionality of a particular device. In the meantime, the search for the ideal EAD continues. Keywords: extraglottic airway devices, laryngeal mask airway, other extraglottic airway devices, safety, technology update

  1. Congenital Chagas disease: an update.

    Science.gov (United States)

    Carlier, Yves; Sosa-Estani, Sergio; Luquetti, Alejandro O; Buekens, Pierre

    2015-05-01

    Congenital infection with Trypanosoma cruzi is a global problem, occurring on average in 5% of children born from chronically infected mothers in endemic areas, with variations depending on the region. This presentation aims to focus on and update epidemiological data, research methods, involved factors, control strategy and possible prevention of congenital infection with T. cruzi. Considering that etiological treatment of the child is always effective if performed before one year of age, the diagnosis of infection in pregnant women and their newborns has to become the standard of care and integrated into the surveillance programs of syphilis and human immunodeficiency virus. In addition to the standard tests, polymerase chain reaction performed on blood of neonates of infected mothers one month after birth might improve the diagnosis of congenital infection. Recent data bring out that its transmission can be prevented through treatment of infected women before they become pregnant. The role of parasite genotypes and host genetic factors in parasite transmission and development of infection in foetuses/neonates has to be more investigated in order to better estimate the risk factors and impact on health of congenital infection with T. cruzi.

  2. Congenital Chagas disease: an update

    Directory of Open Access Journals (Sweden)

    Yves Carlier

    2015-05-01

    Full Text Available Congenital infection with Trypanosoma cruzi is a global problem, occurring on average in 5% of children born from chronically infected mothers in endemic areas, with variations depending on the region. This presentation aims to focus on and update epidemiological data, research methods, involved factors, control strategy and possible prevention of congenital infection with T. cruzi. Considering that etiological treatment of the child is always effective if performed before one year of age, the diagnosis of infection in pregnant women and their newborns has to become the standard of care and integrated into the surveillance programs of syphilis and human immunodeficiency virus. In addition to the standard tests, polymerase chain reaction performed on blood of neonates of infected mothers one month after birth might improve the diagnosis of congenital infection. Recent data bring out that its transmission can be prevented through treatment of infected women before they become pregnant. The role of parasite genotypes and host genetic factors in parasite transmission and development of infection in foetuses/neonates has to be more investigated in order to better estimate the risk factors and impact on health of congenital infection with T. cruzi.

  3. Vasectomy reversal: a clinical update

    Directory of Open Access Journals (Sweden)

    Abhishek P Patel

    2016-01-01

    Full Text Available Vasectomy is a safe and effective method of contraception used by 42-60 million men worldwide. Approximately 3%-6% of men opt for a vasectomy reversal due to the death of a child or divorce and remarriage, change in financial situation, desire for more children within the same marriage, or to alleviate the dreaded postvasectomy pain syndrome. Unlike vasectomy, vasectomy reversal is a much more technically challenging procedure that is performed only by a minority of urologists and places a larger financial strain on the patient since it is usually not covered by insurance. Interest in this procedure has increased since the operating microscope became available in the 1970s, which consequently led to improved patency and pregnancy rates following the procedure. In this clinical update, we discuss patient evaluation, variables that may influence reversal success rates, factors to consider in choosing to perform vasovasostomy versus vasoepididymostomy, and the usefulness of vasectomy reversal to alleviate postvasectomy pain syndrome. We also review the use of robotics for vasectomy reversal and other novel techniques and instrumentation that have emerged in recent years to aid in the success of this surgery.

  4. Updating neutrino magnetic moment constraints

    Directory of Open Access Journals (Sweden)

    B.C. Cañas

    2016-02-01

    Full Text Available In this paper we provide an updated analysis of the neutrino magnetic moments (NMMs, discussing both the constraints on the magnitudes of the three transition moments Λi and the role of the CP violating phases present both in the mixing matrix and in the NMM matrix. The scattering of solar neutrinos off electrons in Borexino provides the most stringent restrictions, due to its robust statistics and the low energies observed, below 1 MeV. Our new limit on the effective neutrino magnetic moment which follows from the most recent Borexino data is 3.1×10−11μB at 90% C.L. This corresponds to the individual transition magnetic moment constraints: |Λ1|≤5.6×10−11μB, |Λ2|≤4.0×10−11μB, and |Λ3|≤3.1×10−11μB (90% C.L., irrespective of any complex phase. Indeed, the incoherent admixture of neutrino mass eigenstates present in the solar flux makes Borexino insensitive to the Majorana phases present in the NMM matrix. For this reason we also provide a global analysis including the case of reactor and accelerator neutrino sources, presenting the resulting constraints for different values of the relevant CP phases. Improved reactor and accelerator neutrino experiments will be needed in order to underpin the full profile of the neutrino electromagnetic properties.

  5. Labor law update--Part 1.

    Science.gov (United States)

    Fiesta, J

    1997-01-01

    To ensure proper actions when making managerial decisions, nurses must be aware of labor laws and the policies that apply to them. Part 1 of "Labor Law Update" discusses public policy considerations and gender, racial and pregnancy discrimination.

  6. Model Updating Nonlinear System Identification Toolbox Project

    Data.gov (United States)

    National Aeronautics and Space Administration — ZONA Technology proposes to develop an enhanced model updating nonlinear system identification (MUNSID) methodology by adopting the flight data with state-of-the-art...

  7. CDC Updates Spending Plans to Combat Zika

    Science.gov (United States)

    ... 161541.html CDC Updates Spending Plans to Combat Zika Some goals: prepare states for future outbreaks, and ... dollars to prepare states and cities for future Zika virus outbreaks, and to track the effects of ...

  8. Rapid Update Cycle (RUC) [13 km

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Rapid Update Cycle (RUC) weather forecast model was developed by the National Centers for Environmental Prediction (NCEP). On May 1, 2012, the RUC was replaced...

  9. Rapid Update Cycle (RUC) [20 km

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Rapid Update Cycle (RUC) weather forecast model was developed by the National Centers for Environmental Prediction (NCEP). On May 1, 2012, the RUC was replaced...

  10. Ecological Subsections for Northern Alaska, 2012 update

    Data.gov (United States)

    Arctic Landscape Conservation Cooperative — This data set represents an updated Ecological Subsection Map for Northern Alaska. This 2012 revision focused on completing the incompletely mapped portion of the...

  11. Earth Observing System Covariance Realism Updates

    Science.gov (United States)

    Ojeda Romero, Juan A.; Miguel, Fred

    2017-01-01

    This presentation will be given at the International Earth Science Constellation Mission Operations Working Group meetings June 13-15, 2017 to discuss the Earth Observing System Covariance Realism updates.

  12. Clinical update on nursing home medicine: 2013.

    Science.gov (United States)

    Messinger-Rapport, Barbara J; Gammack, Julie K; Thomas, David R; Morley, John E

    2013-12-01

    This is the seventh article in the series of Clinical Updates on Nursing Home Care. The topics covered are antiresorptive drugs, hip fracture, hypertension, orthostatic hypotension, depression, undernutrition, anorexia, cachexia, sarcopenia, exercise, pain, and behavioral and psychological symptoms of dementia.

  13. 1990 Kansas Land Cover Patterns Update

    Data.gov (United States)

    Kansas Data Access and Support Center — In 2008, an update of the 1990 Kansas Land Cover Patterns (KLCP) database was undertaken. The 1990 KLCP database depicts 10 general land cover classes for the State...

  14. Bird deterrent and dispersal systems: Research update

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This report is a research update on bird deterrent and dispersal systems by the Petroleum Association for Conservation of the Canadian Environment. The purpose of...

  15. Breast Cancer and Estrogen-Alone Update

    Science.gov (United States)

    ... Issues Research News From NIH Breast Cancer and Estrogen-Alone Update Past Issues / Summer 2006 Table of ... version of this page please turn Javascript on. Estrogen-alone hormone therapy does not increase the risk ...

  16. 77 FR 33980 - Proposed FOIA Fee Schedule Update

    Science.gov (United States)

    2012-06-08

    ... NUCLEAR FACILITIES SAFETY BOARD 10 CFR Part 1703 Proposed FOIA Fee Schedule Update AGENCY: Defense Nuclear... the SUPPLEMENTARY INFORMATION to the Board's proposed FOIA Fee Schedule Update published in the... update the FOIA Fee Schedule once every 12 months. Previous Fee Schedule Updates were published in...

  17. Working Memory Updating as a Predictor of Academic Attainment

    Science.gov (United States)

    Lechuga, M. Teresa; Pelegrina, Santiago; Pelaez, Jose L.; Martin-Puga, M. Eva; Justicia, M. Jose

    2016-01-01

    There is growing evidence supporting the importance of executive functions, and specifically working memory updating (WMU), for children's academic achievement. This study aimed to assess the specific contribution of updating to the prediction of academic performance. Two updating tasks, which included different updating components, were…

  18. Environmental Regulatory Update Table, December 1991

    Energy Technology Data Exchange (ETDEWEB)

    Houlberg, L.M.; Hawkins, G.T.; Salk, M.S.

    1992-01-01

    The Environmental Regulatory Update Table provides information on regulatory initiatives of interest to DOE operations and contractor staff with environmental management responsibilities. The table is updated each month with information from the Federal Register and other sources, including direct contact with regulatory agencies. Each table entry provides a chronological record of the rulemaking process for that initiative with an abstract and a projection of further action.

  19. Environmental Regulatory Update Table, December 1989

    Energy Technology Data Exchange (ETDEWEB)

    Houlbert, L.M.; Langston, M.E. (Tennessee Univ., Knoxville, TN (USA)); Nikbakht, A.; Salk, M.S. (Oak Ridge National Lab., TN (USA))

    1990-01-01

    The Environmental Regulatory Update Table provides information on regulatory initiatives of interest to DOE operations and contractor staff with environmental management responsibilities. The table is updated each month with information from the Federal Register and other sources, including direct contact with regulatory agencies. Each table entry provides a chronological record of the rulemaking process for that initiative with an abstract and a projection of further action.

  20. Environmental Regulatory Update Table, November 1991

    Energy Technology Data Exchange (ETDEWEB)

    Houlberg, L.M.; Hawkins, G.T.; Salk, M.S.

    1991-12-01

    The Environmental Regulatory Update Table provides information on regulatory initiatives of interest to DOE operations and contractor staff with environmental management responsibilities. The table is updated each month with information from the Federal Register and other sources, including direct contact with regulatory agencies. Each table entry provides a chronological record of the rulemaking process for that initiative with an abstract and a projection of further action.

  1. Environmental Regulatory Update Table, August 1991

    Energy Technology Data Exchange (ETDEWEB)

    Houlberg, L.M., Hawkins, G.T.; Salk, M.S.

    1991-09-01

    This Environmental Regulatory Update Table (August 1991) provides information on regulatory initiatives of interest to DOE operations and contractor staff with environmental management responsibilities. The table is updated each month with information from the Federal Register and other sources, including direct contact with regulatory agencies. Each table entry provides a chronological record of the rulemaking process for that initiative with an abstract and a projection of further action.

  2. Environmental Regulatory Update Table, September 1991

    Energy Technology Data Exchange (ETDEWEB)

    Houlberg, L.M.; Hawkins, G.T.; Salk, M.S.

    1991-10-01

    The Environmental Regulatory Update Table provides information on regulatory initiatives of interest to DOE operations and contractor staff with environmental management responsibilities. The table is updated each month with information from the Federal Register and other sources, including direct contact with regulatory agencies. Each table entry provides a chronological record of the rulemaking process for that initiative with an abstract and a projection of further action.

  3. Environmental Regulatory Update Table, October 1991

    Energy Technology Data Exchange (ETDEWEB)

    Houlberg, L.M.; Hawkins, G.T.; Salk, M.S.

    1991-11-01

    The Environmental Regulatory Update Table provides information on regulatory initiatives of interest to DOE operations and contractor staff with environmental management responsibilities. The table is updated each month with information from the Federal Register and other sources, including direct contact with regulatory agencies. Each table entry provides a chronological record of the rulemaking process for that initiative with an abstract and a projection of further action.

  4. Environmental Regulatory Update Table, April 1989

    Energy Technology Data Exchange (ETDEWEB)

    Houlberg, L.; Langston, M.E.; Nikbakht, A.; Salk, M.S.

    1989-05-01

    The Environmental Regulatory Update Table provides information on regulatory initiatives of interest to DOE operations and contractor staff with environmental management responsibilities. The table is updated each month with information from the Federal Register and other sources, including direct contact with regulatory agencies. Each table entry provides a chronological record of the rulemaking process for that initiative with an abstract and a projection of further action.

  5. Military Specification Updates & Deicing Working Group Initiatives

    Science.gov (United States)

    2011-08-18

    Air Force Petroleum Agency I n t e g r i t y - S e r v i c e - E x c e l l e n c e Military Specification Updates & Deicing Working Group...00-2011 4. TITLE AND SUBTITLE Military Specification Updates & Deicing Working Group Initiatives 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c...Corrosion Runway Deicing Fluid Partnership with Battelle Memorial Institute (lead agency), AFRL/ ASC, Army (CRREL), Navy (NAVAIR), Octagon, AMIL

  6. Environmental Regulatory Update Table, April 1989

    Energy Technology Data Exchange (ETDEWEB)

    Houlberg, L.; Langston, M.E.; Nikbakht, A.; Salk, M.S.

    1989-05-01

    The Environmental Regulatory Update Table provides information on regulatory initiatives of interest to DOE operations and contractor staff with environmental management responsibilities. The table is updated each month with information from the Federal Register and other sources, including direct contact with regulatory agencies. Each table entry provides a chronological record of the rulemaking process for that initiative with an abstract and a projection of further action.

  7. Environmental regulatory update table, March 1989

    Energy Technology Data Exchange (ETDEWEB)

    Houlberg, L.; Langston, M.E.; Nikbakht, A.; Salk, M.S.

    1989-04-01

    The Environmental Regulatory Update Table provides information on regulatory initiatives of interest to DOE operations and contractor staff with environmental management responsibilities. The table is updated each month with information from the Federal Register and other sources, including direct contact with regulatory agencies. Each table entry provides a chronological record of the rulemaking process for that initiative with an abstract and a projection of further action.

  8. Environmental Regulatory Update Table, November 1991

    Energy Technology Data Exchange (ETDEWEB)

    Houlberg, L.M.; Hawkins, G.T.; Salk, M.S.

    1991-12-01

    The Environmental Regulatory Update Table provides information on regulatory initiatives of interest to DOE operations and contractor staff with environmental management responsibilities. The table is updated each month with information from the Federal Register and other sources, including direct contact with regulatory agencies. Each table entry provides a chronological record of the rulemaking process for that initiative with an abstract and a projection of further action.

  9. Parallel Markov chain Monte Carlo simulations.

    Science.gov (United States)

    Ren, Ruichao; Orkoulas, G

    2007-06-07

    With strict detailed balance, parallel Monte Carlo simulation through domain decomposition cannot be validated with conventional Markov chain theory, which describes an intrinsically serial stochastic process. In this work, the parallel version of Markov chain theory and its role in accelerating Monte Carlo simulations via cluster computing is explored. It is shown that sequential updating is the key to improving efficiency in parallel simulations through domain decomposition. A parallel scheme is proposed to reduce interprocessor communication or synchronization, which slows down parallel simulation with increasing number of processors. Parallel simulation results for the two-dimensional lattice gas model show substantial reduction of simulation time for systems of moderate and large size.

  10. Stochastic model updating using distance discrimination analysis

    Institute of Scientific and Technical Information of China (English)

    Deng Zhongmin; Bi Sifeng; Sez Atamturktur

    2014-01-01

    This manuscript presents a stochastic model updating method, taking both uncertainties in models and variability in testing into account. The updated finite element (FE) models obtained through the proposed technique can aid in the analysis and design of structural systems. The authors developed a stochastic model updating method integrating distance discrimination analysis (DDA) and advanced Monte Carlo (MC) technique to (1) enable more efficient MC by using a response surface model, (2) calibrate parameters with an iterative test-analysis correlation based upon DDA, and (3) utilize and compare different distance functions as correlation metrics. Using DDA, the influence of distance functions on model updating results is analyzed. The proposed sto-chastic method makes it possible to obtain a precise model updating outcome with acceptable cal-culation cost. The stochastic method is demonstrated on a helicopter case study updated using both Euclidian and Mahalanobis distance metrics. It is observed that the selected distance function influ-ences the iterative calibration process and thus, the calibration outcome, indicating that an integra-tion of different metrics might yield improved results.

  11. Particle filter with importance density function generated by updated system equation

    Institute of Scientific and Technical Information of China (English)

    左军毅; 贾颖娜; 张炜; 高全学

    2013-01-01

    The current measurement was exploited in a more efficient way. Firstly, the system equation was updated by introducing a correction term, which depends on the current measurement and can be obtained by running a suboptimal filter. Then, a new importance density function(IDF) was defined by the updated system equation. Particles drawn from the new IDF are more likely to be in the significant region of state space and the estimation accuracy can be improved. By using different suboptimal filter, different particle filters(PFs) can be developed in this framework. Extensions of this idea were also proposed by iteratively updating the system equation using particle filter itself, resulting in the iterated particle filter. Simulation results demonstrate the effectiveness of the proposed IDF.

  12. Pattern Recognition Using Carbon Nanotube Synaptic Transistors with an Adjustable Weight Update Protocol.

    Science.gov (United States)

    Kim, Sungho; Choi, Bongsik; Lim, Meehyun; Yoon, Jinsu; Lee, Juhee; Kim, Hee-Dong; Choi, Sung-Jin

    2017-03-28

    Recent electronic applications require an efficient computing system that can perform data processing with limited energy consumption. Inspired by the massive parallelism of the human brain, a neuromorphic system (hardware neural network) may provide an efficient computing unit to perform such tasks as classification and recognition. However, the implementation of synaptic devices (i.e., the essential building blocks for emulating the functions of biological synapses) remains challenging due to their uncontrollable weight update protocol and corresponding uncertain effects on the operation of the system, which can lead to a bottleneck in the continuous design and optimization. Here, we demonstrate a synaptic transistor based on highly purified, preseparated 99% semiconducting carbon nanotubes, which can provide adjustable weight update linearity and variation margin. The pattern recognition efficacy is validated using a device-to-system level simulation framework. The enlarged margin rather than the linear weight update can enhance the fault tolerance of the recognition system, which improves the recognition accuracy.

  13. History Microcomputer Games: Update 2.

    Science.gov (United States)

    Sargent, James E.

    1985-01-01

    Provides full narrative reviews of B-1 Nuclear Bomber (Avalon, 1982); American History Adventure (Social Science Microcomputer Review Software, 1985); Government Simulations (Prentice-Hall, 1985); and The Great War, FDR and the New Deal, and Hitler's War, all from New Worlds Software, 1985. Lists additional information on five other history and…

  14. Quantifying Update Effects in Citizen-Oriented Software

    Directory of Open Access Journals (Sweden)

    Ion Ivan

    2009-02-01

    Full Text Available Defining citizen-oriented software. Detailing technical issues regarding update process in this kind of software. Presenting different effects triggered by types of update. Building model for update costs estimation, including producer-side and consumer-side effects. Analyzing model applicability on INVMAT – large scale matrix inversion software. Proposing a model for update effects estimation. Specifying ways for softening effects of inaccurate updates.

  15. Sensitivity-based finite element model updating using constrained optimization with a trust region algorithm

    Science.gov (United States)

    Bakir, Pelin Gundes; Reynders, Edwin; De Roeck, Guido

    2007-08-01

    The use of changes in dynamic system characteristics to detect damage has received considerable attention during the last years. Within this context, FE model updating technique, which belongs to the class of inverse problems in classical mechanics, is used to detect, locate and quantify damage. In this study, a sensitivity-based finite element (FE) model updating scheme using a trust region algorithm is developed and implemented in a complex structure. A damage scenario is applied on the structure in which the stiffness values of the beam elements close to the beam-column joints are decreased by stiffness reduction factors. A worst case and complex damage pattern is assumed such that the stiffnesses of adjacent elements are decreased by substantially different stiffness reduction factors. The objective of the model updating is to minimize the differences between the eigenfrequency and eigenmodes residuals. The updating parameters of the structure are the stiffness reduction factors. The changes of these parameters are determined iteratively by solving a nonlinear constrained optimization problem. The FE model updating algorithm is also tested in the presence of two levels of noise in simulated measurements. In all three cases, the updated MAC values are above 99% and the relative eigenfrequency differences improve substantially after model updating. In cases without noise and with moderate levels of noise; detection, localization and quantification of damage are successfully accomplished. In the case with substantially noisy measurements, detection and localization of damage are successfully realized. Damage quantification is also promising in the presence of high noise as the algorithm can still predict 18 out of 24 damage parameters relatively accurately in that case.

  16. Dutch Venous Ulcer guideline update.

    Science.gov (United States)

    Maessen-Visch, M Birgitte; de Roos, Kees-Peter

    2014-05-01

    The revised guideline of 2013 is an update of the 2005 guideline "venous leg ulcer". In this special project four separate guidelines (venous leg ulcer, varicose veins, compression therapy and deep venous disorders) were revised and developed simultaneously. A meeting was held including representatives of any organisation involved in venous disease management including patient organizations and health insurance companies. Eighteen clinical questions where defined, and a new strategy was used to accelerate the process. This resulted in two new and two revised guidelines within one year. The guideline committee advises use of the C of the CEAP classification as well as the Venous Clinical Severity Score (VCSS) and a Quality of life (QoL) score in the assessment of clinical signs. These can provide insight into the burden of disease and the effects of treatment as experienced by the patient. A duplex ultrasound should be performed in every patient to establish the underlying aetiology and to evaluate the need for treatment (which is discussed in a separate guideline). The use of the TIME model for describing venous ulcers is recommended. There is no evidence for antiseptic or antibiotic wound care products except for a Cochrane review in which some evidence is presented for cadexomer iodine. Signs of infection are the main reason for the use of oral antibiotics. When the ulcer fails to heal the use of oral aspirin and pentoxifylline can be considered as an adjunct. For the individual patient, the following aspects should be considered: the appearance of the ulcer (amount of exudate) according to the TIME model, the influence of wound care products on moisturising the wound, frequency of changing compression bandages, pain and allergies. The cost of the dressings should also be considered. Education and training of patients t improves compliance with compression therapy but does not influence wound healing rates.

  17. Obesity management: Update on orlistat

    Directory of Open Access Journals (Sweden)

    Belinda S Drew

    2008-01-01

    Full Text Available Belinda S Drew, Andrew F Dixon, John B DixonCentre for Obesity Research and Education, Monash University, Melbourne, AustraliaAbstract: Over the past 20 years obesity has become a worldwide concern of frightening proportion. The World Health Organization estimates that there are over 400 million obese and over 1.6 billion overweight adults, a figure which is projected to almost double by 2015. This is not a disease restricted to adults – at least 20 million children under the age of 5 years were overweight in 2005 (WHO 2006. Overweight and obesity lead to serious health consequences including coronary artery disease, stroke, type-2 diabetes, heart failure, dyslipidemia, hypertension, reproductive and gastrointestinal cancers, gallstones, fatty liver disease, osteoarthritis and sleep apnea (Padwal et al 2003.Modest weight loss in the obese of between 5% and 10% of bodyweight is associated with improvements in cardiovascular risk profiles and reduced incidence of type 2 diabetes (Goldstein 1992; Avenell et al 2004; Padwal and Majumdar 2007. Orlistat, a gastric and pancreatic lipase inhibitor that reduces dietary fat absorption by approximately 30%, has been approved for use for around ten years (Zhi et al 1994; Hauptman 2000. There is now a growing body of evidence to suggest that Orlistat assists weight loss and that it may also have additional benefits. The aim of this review is to provide a brief update on the current literature studying the efficacy, safety and significance of the use of Orlistat in clinical practice.Keywords: obese, weight, diet, orlistat, hypertension, cholesterol

  18. The world's largest turbulence simulations

    CERN Document Server

    Federrath, Christoph; Iapichino, Luigi; Hammer, Nicolay J

    2016-01-01

    Understanding turbulence is critical for a wide range of terrestrial and astrophysical applications. Here we present first results of the world's highest-resolution simulation of turbulence ever done. The current simulation has a grid resolution of 10048^3 points and was performed on 65536 compute cores on SuperMUC at the Leibniz Supercomputing Centre (LRZ). We present a scaling test of our modified version of the FLASH code, which updates the hydrodynamical equations in less than 3 micro seconds per cell per time step. A first look at the column density structure of the 10048^3 simulation is presented and a detailed analysis is provided in a forthcoming paper.

  19. A 2-stage strategy updating rule promotes cooperation in the prisoner's dilemma game

    Institute of Scientific and Technical Information of China (English)

    Fang Xiang-Sheng; Zhu Ping; Liu Run-Ran; Liu En-Yu; Wei Gui-Yi

    2012-01-01

    In this study,we propose a spatial prisoner's dilemma game model with a 2-stage strategy updating rule,and focus on the cooperation behavior of the system.In the first stage,i.e.,the pre-learning stage,a focal player decides whether to update his strategy according to the pre-learning factor β and the payoff difference between himself and the average of his neighbors.If the player makes up his mind to update,he enters into the second stage,i.e.,the learning stage,and adopts a strategy of a randomly selected neighbor according to the standard Fermi updating rule. The simulation results show that the cooperation level has a non-trivial dependence on the pre-learning factor.Generally,the cooperation frequency decreases as the pre-learning factor increases; but a high cooperation level can be obtained in the intermediate region of -3 < β < -1.We then give some explanations via studying the co-action of pre-learning and learning.Our results may sharpen the understanding of the influence of the strategy updating rule on evolutionary games.

  20. Aircraft engine sensor fault diagnostics using an on-line OBEM update method.

    Science.gov (United States)

    Liu, Xiaofeng; Xue, Naiyu; Yuan, Ye

    2017-01-01

    This paper proposed a method to update the on-line health reference baseline of the On-Board Engine Model (OBEM) to maintain the effectiveness of an in-flight aircraft sensor Fault Detection and Isolation (FDI) system, in which a Hybrid Kalman Filter (HKF) was incorporated. Generated from a rapid in-flight engine degradation, a large health condition mismatch between the engine and the OBEM can corrupt the performance of the FDI. Therefore, it is necessary to update the OBEM online when a rapid degradation occurs, but the FDI system will lose estimation accuracy if the estimation and update are running simultaneously. To solve this problem, the health reference baseline for a nonlinear OBEM was updated using the proposed channel controller method. Simulations based on the turbojet engine Linear-Parameter Varying (LPV) model demonstrated the effectiveness of the proposed FDI system in the presence of substantial degradation, and the channel controller can ensure that the update process finishes without interference from a single sensor fault.

  1. Aircraft engine sensor fault diagnostics using an on-line OBEM update method

    Science.gov (United States)

    Liu, Xiaofeng; Xue, Naiyu; Yuan, Ye

    2017-01-01

    This paper proposed a method to update the on-line health reference baseline of the On-Board Engine Model (OBEM) to maintain the effectiveness of an in-flight aircraft sensor Fault Detection and Isolation (FDI) system, in which a Hybrid Kalman Filter (HKF) was incorporated. Generated from a rapid in-flight engine degradation, a large health condition mismatch between the engine and the OBEM can corrupt the performance of the FDI. Therefore, it is necessary to update the OBEM online when a rapid degradation occurs, but the FDI system will lose estimation accuracy if the estimation and update are running simultaneously. To solve this problem, the health reference baseline for a nonlinear OBEM was updated using the proposed channel controller method. Simulations based on the turbojet engine Linear-Parameter Varying (LPV) model demonstrated the effectiveness of the proposed FDI system in the presence of substantial degradation, and the channel controller can ensure that the update process finishes without interference from a single sensor fault. PMID:28182692

  2. Twenty Years On!: Updating the IEA BESTEST Building Thermal Fabric Test Cases for ASHRAE Standard 140

    Energy Technology Data Exchange (ETDEWEB)

    Judkoff, R. [National Renewable Energy Lab. (NREL), Golden, CO (United States); Neymark, J. [J. Neymark & Associates, Golden, CO (United States)

    2013-07-01

    ANSI/ASHRAE Standard 140, Standard Method of Test for the Evaluation of Building Energy Analysis Computer Programs applies the IEA BESTEST building thermal fabric test cases and example simulation results originally published in 1995. These software accuracy test cases and their example simulation results, which comprise the first test suite adapted for the initial 2001 version of Standard 140, are approaching their 20th anniversary. In response to the evolution of the state of the art in building thermal fabric modeling since the test cases and example simulation results were developed, work is commencing to update the normative test specification and the informative example results.

  3. Dissociating Working Memory Updating and Automatic Updating: The Reference-Back Paradigm

    Science.gov (United States)

    Rac-Lubashevsky, Rachel; Kessler, Yoav

    2016-01-01

    Working memory (WM) updating is a controlled process through which relevant information in the environment is selected to enter the gate to WM and substitute its contents. We suggest that there is also an automatic form of updating, which influences performance in many tasks and is primarily manifested in reaction time sequential effects. The goal…

  4. Effect of overpasses in the Biham-Middleton-Levine traffic flow model with random and parallel update rule

    Science.gov (United States)

    Ding, Zhong-Jun; Jiang, Rui; Gao, Zi-You; Wang, Bing-Hong; Long, Jiancheng

    2013-08-01

    The effect of overpasses in the Biham-Middleton-Levine traffic flow model with random and parallel update rules has been studied. An overpass is a site that can be occupied simultaneously by an eastbound car and a northbound one. Under periodic boundary conditions, both self-organized and random patterns are observed in the free-flowing phase of the parallel update model, while only the random pattern is observed in the random update model. We have developed mean-field analysis for the moving phase of the random update model, which agrees with the simulation results well. An intermediate phase is observed in which some cars could pass through the jamming cluster due to the existence of free paths in the random update model. Two intermediate states are observed in the parallel update model, which have been ignored in previous studies. The intermediate phases in which the jamming skeleton is only oriented along the diagonal line in both models have been analyzed, with the analyses agreeing well with the simulation results. With the increase of overpass ratio, the jamming phase and the intermediate phases disappear in succession for both models. Under open boundary conditions, the system exhibits only two phases when the ratio of overpasses is below a threshold in the random update model. When the ratio of the overpass is close to 1, three phases could be observed, similar to the totally asymmetric simple exclusion process model. The dependence of the average velocity, the density, and the flow rate on the injection probability in the moving phase has also been obtained through mean-field analysis. The results of the parallel model under open boundary conditions are similar to that of the random update model.

  5. Updated NGNP Fuel Acquisition Strategy

    Energy Technology Data Exchange (ETDEWEB)

    David Petti; Tim Abram; Richard Hobbins; Jim Kendall

    2010-12-01

    A Next Generation Nuclear Plant (NGNP) fuel acquisition strategy was first established in 2007. In that report, a detailed technical assessment of potential fuel vendors for the first core of NGNP was conducted by an independent group of international experts based on input from the three major reactor vendor teams. Part of the assessment included an evaluation of the credibility of each option, along with a cost and schedule to implement each strategy compared with the schedule and throughput needs of the NGNP project. While credible options were identified based on the conditions in place at the time, many changes in the assumptions underlying the strategy and in externalities that have occurred in the interim requiring that the options be re-evaluated. This document presents an update to that strategy based on current capabilities for fuel fabrication as well as fuel performance and qualification testing worldwide. In light of the recent Pebble Bed Modular Reactor (PBMR) project closure, the Advanced Gas Reactor (AGR) fuel development and qualification program needs to support both pebble and prismatic options under the NGNP project. A number of assumptions were established that formed a context for the evaluation. Of these, the most important are: • Based on logistics associated with the on-going engineering design activities, vendor teams would start preliminary design in October 2012 and complete in May 2014. A decision on reactor type will be made following preliminary design, with the decision process assumed to be completed in January 2015. Thus, no fuel decision (pebble or prismatic) will be made in the near term. • Activities necessary for both pebble and prismatic fuel qualification will be conducted in parallel until a fuel form selection is made. As such, process development, fuel fabrication, irradiation, and testing for pebble and prismatic options should not negatively influence each other during the period prior to a decision on reactor type

  6. Nonlinear structural joint model updating based on instantaneous characteristics of dynamic responses

    Science.gov (United States)

    Wang, Zuo-Cai; Xin, Yu; Ren, Wei-Xin

    2016-08-01

    This paper proposes a new nonlinear joint model updating method for shear type structures based on the instantaneous characteristics of the decomposed structural dynamic responses. To obtain an accurate representation of a nonlinear system's dynamics, the nonlinear joint model is described as the nonlinear spring element with bilinear stiffness. The instantaneous frequencies and amplitudes of the decomposed mono-component are first extracted by the analytical mode decomposition (AMD) method. Then, an objective function based on the residuals of the instantaneous frequencies and amplitudes between the experimental structure and the nonlinear model is created for the nonlinear joint model updating. The optimal values of the nonlinear joint model parameters are obtained by minimizing the objective function using the simulated annealing global optimization method. To validate the effectiveness of the proposed method, a single-story shear type structure subjected to earthquake and harmonic excitations is simulated as a numerical example. Then, a beam structure with multiple local nonlinear elements subjected to earthquake excitation is also simulated. The nonlinear beam structure is updated based on the global and local model using the proposed method. The results show that the proposed local nonlinear model updating method is more effective for structures with multiple local nonlinear elements. Finally, the proposed method is verified by the shake table test of a real high voltage switch structure. The accuracy of the proposed method is quantified both in numerical and experimental applications using the defined error indices. Both the numerical and experimental results have shown that the proposed method can effectively update the nonlinear joint model.

  7. Valence-Dependent Belief Updating: Computational Validation.

    Science.gov (United States)

    Kuzmanovic, Bojana; Rigoux, Lionel

    2017-01-01

    People tend to update beliefs about their future outcomes in a valence-dependent way: they are likely to incorporate good news and to neglect bad news. However, belief formation is a complex process which depends not only on motivational factors such as the desire for favorable conclusions, but also on multiple cognitive variables such as prior beliefs, knowledge about personal vulnerabilities and resources, and the size of the probabilities and estimation errors. Thus, we applied computational modeling in order to test for valence-induced biases in updating while formally controlling for relevant cognitive factors. We compared biased and unbiased Bayesian models of belief updating, and specified alternative models based on reinforcement learning. The experiment consisted of 80 trials with 80 different adverse future life events. In each trial, participants estimated the base rate of one of these events and estimated their own risk of experiencing the event before and after being confronted with the actual base rate. Belief updates corresponded to the difference between the two self-risk estimates. Valence-dependent updating was assessed by comparing trials with good news (better-than-expected base rates) with trials with bad news (worse-than-expected base rates). After receiving bad relative to good news, participants' updates were smaller and deviated more strongly from rational Bayesian predictions, indicating a valence-induced bias. Model comparison revealed that the biased (i.e., optimistic) Bayesian model of belief updating better accounted for data than the unbiased (i.e., rational) Bayesian model, confirming that the valence of the new information influenced the amount of updating. Moreover, alternative computational modeling based on reinforcement learning demonstrated higher learning rates for good than for bad news, as well as a moderating role of personal knowledge. Finally, in this specific experimental context, the approach based on reinforcement

  8. Valence-Dependent Belief Updating: Computational Validation

    Directory of Open Access Journals (Sweden)

    Bojana Kuzmanovic

    2017-06-01

    Full Text Available People tend to update beliefs about their future outcomes in a valence-dependent way: they are likely to incorporate good news and to neglect bad news. However, belief formation is a complex process which depends not only on motivational factors such as the desire for favorable conclusions, but also on multiple cognitive variables such as prior beliefs, knowledge about personal vulnerabilities and resources, and the size of the probabilities and estimation errors. Thus, we applied computational modeling in order to test for valence-induced biases in updating while formally controlling for relevant cognitive factors. We compared biased and unbiased Bayesian models of belief updating, and specified alternative models based on reinforcement learning. The experiment consisted of 80 trials with 80 different adverse future life events. In each trial, participants estimated the base rate of one of these events and estimated their own risk of experiencing the event before and after being confronted with the actual base rate. Belief updates corresponded to the difference between the two self-risk estimates. Valence-dependent updating was assessed by comparing trials with good news (better-than-expected base rates with trials with bad news (worse-than-expected base rates. After receiving bad relative to good news, participants' updates were smaller and deviated more strongly from rational Bayesian predictions, indicating a valence-induced bias. Model comparison revealed that the biased (i.e., optimistic Bayesian model of belief updating better accounted for data than the unbiased (i.e., rational Bayesian model, confirming that the valence of the new information influenced the amount of updating. Moreover, alternative computational modeling based on reinforcement learning demonstrated higher learning rates for good than for bad news, as well as a moderating role of personal knowledge. Finally, in this specific experimental context, the approach based on

  9. Important update of CERN Mail Services

    CERN Multimedia

    IT Department

    2009-01-01

    The CERN Mail Services are evolving. In the course of June and July 2009, all CERN mailboxes will be updated with a new infrastructure for hosting mailboxes, running Exchange 2007. This update is taking place in order to provide the capacity upgrade for the constantly growing volume of CERN mailboxes. It is also the opportunity to provide a number of improvements to CERN mailboxes: new and improved Outlook Web Access (the web interface used to access your mailbox from a web browser, also known as "webmail"), new features in the Out-of-Office auto-reply assistant, easier spam management... The update will preserve the mailbox configuration and no specific action is required by users. During the next weeks, each mailbox will be individually notified of the upcoming update the day before it takes place. We invite all users to carefully read this notification as it will contain the latest information for this update. The mailbox will be unavailable for a short time during the ni...

  10. Differential evolution Markov chain with snooker updater and fewer chains

    Energy Technology Data Exchange (ETDEWEB)

    Vrugt, Jasper A [Los Alamos National Laboratory; Ter Braak, Cajo J F [NON LANL

    2008-01-01

    Differential Evolution Markov Chain (DE-MC) is an adaptive MCMC algorithm, in which multiple chains are run in parallel. Standard DE-MC requires at least N=2d chains to be run in parallel, where d is the dimensionality of the posterior. This paper extends DE-MC with a snooker updater and shows by simulation and real examples that DE-MC can work for d up to 50--100 with fewer parallel chains (e.g. N=3) by exploiting information from their past by generating jumps from differences of pairs of past states. This approach extends the practical applicability of DE-MC and is shown to be about 5--26 times more efficient than the optimal Normal random walk Metropolis sampler for the 97.5% point of a variable from a 25--50 dimensional Student T{sub 3} distribution. In a nonlinear mixed effects model example the approach outperformed a block-updater geared to the specific features of the model.

  11. Clean Coal Technology Programs: Program Update 2009

    Energy Technology Data Exchange (ETDEWEB)

    None

    2009-10-01

    The purpose of the Clean Coal Technology Programs: Program Update 2009 is to provide an updated status of the U.S. Department of Energy (DOE) commercial-scale demonstrations of clean coal technologies (CCT). These demonstrations have been performed under the Clean Coal Technology Demonstration Program (CCTDP), the Power Plant Improvement Initiative (PPII), and the Clean Coal Power Initiative (CCPI). Program Update 2009 provides: (1) a discussion of the role of clean coal technology demonstrations in improving the nation’s energy security and reliability, while protecting the environment using the nation’s most abundant energy resource—coal; (2) a summary of the funding and costs of the demonstrations; and (3) an overview of the technologies being demonstrated, along with fact sheets for projects that are active, recently completed, or recently discontinued.

  12. A Provenance Tracking Model for Data Updates

    Directory of Open Access Journals (Sweden)

    Gabriel Ciobanu

    2012-08-01

    Full Text Available For data-centric systems, provenance tracking is particularly important when the system is open and decentralised, such as the Web of Linked Data. In this paper, a concise but expressive calculus which models data updates is presented. The calculus is used to provide an operational semantics for a system where data and updates interact concurrently. The operational semantics of the calculus also tracks the provenance of data with respect to updates. This provides a new formal semantics extending provenance diagrams which takes into account the execution of processes in a concurrent setting. Moreover, a sound and complete model for the calculus based on ideals of series-parallel DAGs is provided. The notion of provenance introduced can be used as a subjective indicator of the quality of data in concurrent interacting systems.

  13. Performance Evaluation of Biometric Template Update

    CERN Document Server

    Giot, Romain; Dorizzi, Bernadette

    2012-01-01

    Template update allows to modify the biometric reference of a user while he uses the biometric system. With such kind of mechanism we expect the biometric system uses always an up to date representation of the user, by capturing his intra-class (temporary or permanent) variability. Although several studies exist in the literature, there is no commonly adopted evaluation scheme. This does not ease the comparison of the different systems of the literature. In this paper, we show that using different evaluation procedures can lead in different, and contradictory, interpretations of the results. We use a keystroke dynamics (which is a modality suffering of template ageing quickly) template update system on a dataset consisting of height different sessions to illustrate this point. Even if we do not answer to this problematic, it shows that it is necessary to normalize the template update evaluation procedures.

  14. The neural dynamics of updating person impressions.

    Science.gov (United States)

    Mende-Siedlecki, Peter; Cai, Yang; Todorov, Alexander

    2013-08-01

    Person perception is a dynamic, evolving process. Because other people are an endless source of social information, people need to update their impressions of others based upon new information. We devised an fMRI study to identify brain regions involved in updating impressions. Participants saw faces paired with valenced behavioral information and were asked to form impressions of these individuals. Each face was seen five times in a row, each time with a different behavioral description. Critically, for half of the faces the behaviors were evaluatively consistent, while for the other half they were inconsistent. In line with prior work, dorsomedial prefrontal cortex (dmPFC) was associated with forming impressions of individuals based on behavioral information. More importantly, a whole-brain analysis revealed a network of other regions associated with updating impressions of individuals who exhibited evaluatively inconsistent behaviors, including rostrolateral PFC, superior temporal sulcus, right inferior parietal lobule and posterior cingulate cortex.

  15. Updating the reference population to achieve constant genomic prediction reliability across generations.

    Science.gov (United States)

    Pszczola, M; Calus, M P L

    2016-06-01

    The reliability of genomic breeding values (DGV) decays over generations. To keep the DGV reliability at a constant level, the reference population (RP) has to be continuously updated with animals from new generations. Updating RP may be challenging due to economic reasons, especially for novel traits involving expensive phenotyping. Therefore, the goal of this study was to investigate a minimal RP update size to keep the reliability at a constant level across generations. We used a simulated dataset resembling a dairy cattle population. The trait of interest was not included itself in the selection index, but it was affected by selection pressure by being correlated with an index trait that represented the overall breeding goal. The heritability of the index trait was assumed to be 0.25 and for the novel trait the heritability equalled 0.2. The genetic correlation between the two traits was 0.25. The initial RP (n=2000) was composed of cows only with a single observation per animal. Reliability of DGV using the initial RP was computed by evaluating contemporary animals. Thereafter, the RP was used to evaluate animals which were one generation younger from the reference individuals. The drop in the reliability when evaluating younger animals was then assessed and the RP was updated to re-gain the initial reliability. The update animals were contemporaries of evaluated animals (EVA). The RP was updated in batches of 100 animals/update. First, the animals most closely related to the EVA were chosen to update RP. The results showed that, approximately, 600 animals were needed every generation to maintain the DGV reliability at a constant level across generations. The sum of squared relationships between RP and EVA and the sum of off-diagonal coefficients of the inverse of the genomic relationship matrix for RP, separately explained 31% and 34%, respectively, of the variation in the reliability across generations. Combined, these parameters explained 53% of the

  16. Indoor Spatial Updating with Reduced Visual Information.

    Directory of Open Access Journals (Sweden)

    Gordon E Legge

    Full Text Available Spatial updating refers to the ability to keep track of position and orientation while moving through an environment. People with impaired vision may be less accurate in spatial updating with adverse consequences for indoor navigation. In this study, we asked how artificial restrictions on visual acuity and field size affect spatial updating, and also judgments of the size of rooms.Normally sighted young adults were tested with artificial restriction of acuity in Mild Blur (Snellen 20/135 and Severe Blur (Snellen 20/900 conditions, and a Narrow Field (8° condition. The subjects estimated the dimensions of seven rectangular rooms with and without these visual restrictions. They were also guided along three-segment paths in the rooms. At the end of each path, they were asked to estimate the distance and direction to the starting location. In Experiment 1, the subjects walked along the path. In Experiment 2, they were pushed in a wheelchair to determine if reduced proprioceptive input would result in poorer spatial updating.With unrestricted vision, mean Weber fractions for room-size estimates were near 20%. Severe Blur but not Mild Blur yielded larger errors in room-size judgments. The Narrow Field was associated with increased error, but less than with Severe Blur. There was no effect of visual restriction on estimates of distance back to the starting location, and only Severe Blur yielded larger errors in the direction estimates. Contrary to expectation, the wheelchair subjects did not exhibit poorer updating performance than the walking subjects, nor did they show greater dependence on visual condition.If our results generalize to people with low vision, severe deficits in acuity or field will adversely affect the ability to judge the size of indoor spaces, but updating of position and orientation may be less affected by visual impairment.

  17. Updated Colombian Seismic Hazard Map

    Science.gov (United States)

    Eraso, J.; Arcila, M.; Romero, J.; Dimate, C.; Bermúdez, M. L.; Alvarado, C.

    2013-05-01

    possible to determinate environments and scenarios where the seismic hazard is a function of distance and magnitude and also the principal seismic sources that contribute to the seismic hazard at each site (dissagregation). This project was conducted by the Servicio Geológico Colombiano (Colombian Geological Survey) and the Universidad Nacional de Colombia (National University of Colombia), with the collaboration of national and foreign experts and the National System of Prevention and Attention of Disaster (SNPAD). It is important to stand out that this new seismic hazard map was used in the updated national building code (NSR-10). A new process is ongoing in order to improve and present the Seismic Hazard Map in terms of intensity. This require new knowledge in site effects, in both local and regional scales, checking the existing and develop new acceleration to intensity relationships, in order to obtain results more understandable and useful for a wider range of users, not only in the engineering field, but also all the risk assessment and management institutions, research and general community.

  18. Erythropoietin: physiology and pharmacology update.

    Science.gov (United States)

    Fisher, James W

    2003-01-01

    This minireview is an update of a 1997 review on erythropoietin (EPO) in this journal. EPO is a 30,400-dalton glycoprotein that regulates red cell production. In the human, EPO is produced by peritubular cells in the kidneys of the adult and in hepatocytes in the fetus. Small amounts of extra-renal EPO are produced by the liver in adult human subjects. EPO binds to an erythroid progenitor cell surface receptor that includes a p66 chain, and, when activated, the p66 protein becomes dimerized. EPO receptor activation induces a JAK2 tyrosine kinase, which leads to tyrosine phosphorylation of the EPO receptor and several proteins. EPO receptor binding leads to intracellular activation of the Ras/mitogen-activated kinase pathway, which is involved with cell proliferation, phosphatidylinositol 3-kinase, and STATS 1, 3, 5A, and 5B transcriptional factors. EPO acts primarily to rescue erythroid cells from apoptosis (programmed cell death) to increase their survival. EPO acts synergistically with several growth factors (SCF, GM-CSF, 1L-3, and IGF-1) to cause maturation and proliferation of erythroid progenitor cells (primarily colony-forming unit-E). Oxygen-dependent regulation of EPO gene expression is postulated to be controlled by a hypoxia-inducible transcription factor (HIF-1alpha). Hypoxia-inducible EPO production is controlled by a 50-bp hypoxia-inducible enhancer that is approximately 120 bp 3' to the polyadenylation site. Hypoxia signal transduction pathways involve kinases A and C, phospholipase A(2), and transcription factors ATF-1 and CREB-1. A model has been proposed for adenosine activation of EPO production that involves protein kinases A and C and the phospholipase A(2) pathway. Other effects of EPO include a hematocrit-independent, vasoconstriction-dependent hypertension, increased endothelin production, upregulation of tissue renin, change in vascular tissue prostaglandins production, stimulation of angiogenesis, and stimulation of endothelial and vascular

  19. Brucellosis update in Libya and regional prospective.

    Science.gov (United States)

    Ahmed, Mohamed O; Abouzeed, Yousef M; Bennour, Emad M; van Velkinburgh, Jennifer C

    2015-02-01

    Brucellosis is a global bacterial zoonosis responsible for high morbidity in humans and significant livestock economic losses. While brucellosis remains a public health concern worldwide, its global geographic distribution is variable, largely due to different management schemes; however, paucity of information renders the status of brucellosis unclear and incomplete in many countries, especially those with low income and under-developed infrastructure. This short article summarizes and discusses recent important updates on brucellosis from the North African countries, with a particular brief emphasis on the current status and recent updates in Libya.

  20. The Molecular Biology Database Collection: 2008 update.

    Science.gov (United States)

    Galperin, Michael Y

    2008-01-01

    The Nucleic Acids Research online Molecular Biology Database Collection is a public repository that lists more than 1000 databases described in this and previous Nucleic Acids Research annual database issues, as well as a selection of molecular biology databases described in other journals. All databases included in this Collection are freely available to the public. The 2008 update includes 1078 databases, 110 more than the previous one. The links to more than 80 databases have been updated and 25 obsolete databases have been removed from the list. The complete database list and summaries are available online at the Nucleic Acids Research web site, http://nar.oxfordjournals.org/.

  1. Update in clinical allergy and immunology.

    Science.gov (United States)

    von Gunten, S; Marsland, B J; von Garnier, C; Simon, D

    2012-12-01

    In the recent years, a tremendous body of studies has addressed a broad variety of distinct topics in clinical allergy and immunology. In this update, we discuss selected recent data that provide clinically and pathogenetically relevant insights or identify potential novel targets and strategies for therapy. The role of the microbiome in shaping allergic immune responses and molecular, as well as cellular mechanisms of disease, is discussed separately and in the context of atopic dermatitis, as an allergic model disease. Besides summarizing novel evidence, this update highlights current areas of uncertainties and debates that, as we hope, shall stimulate scientific discussions and research activities in the field.

  2. State energy-price system: 1981 update

    Energy Technology Data Exchange (ETDEWEB)

    Fang, J.M.; Imhoff, K.L.; Hood, L.J.

    1983-08-01

    This report updates the State Energy Price Data System (STEPS) to include state-level energy prices by fuel and by end-use sectors for 1981. Both physical unit prices and Btu prices are presented. Basic documentation of the data base remains generally the same as in the original report: State Energy Price System; Volume 1: Overview and Technical Documentation (DOE/NBB-0029 Volume 1 of 2, November 1982). The present report documents only the changes in procedures necessitated by the update to 1981 and the corrections to the basic documentation.

  3. Concepts of incremental updating and versioning

    CSIR Research Space (South Africa)

    Cooper, Antony K

    2004-07-01

    Full Text Available . BACKGROUND TO THE PROBLEM OF INCREMENTAL UPDATING AND VERSIONING As well as a number of Commissions, the International Cartographic Association (ICA) had one Working Group, on Incremental Updating and Versioning, and this presentation describes some... of the work undertaken recently by the Working Group (WG). The WG was voted for a Commission by the General Assembly held at the 21st ICC in Durban, South Africa. The basic problem being addressed by the Commission is that a user compiles their data base...

  4. Beyond pairwise strategy updating in the prisoner's dilemma game

    CERN Document Server

    Wang, Xiaofeng; Liu, Yongkui; Chen, Xiaojie; Wang, Long; 10.1038/srep00740

    2012-01-01

    In spatial games players typically alter their strategy by imitating the most successful or one randomly selected neighbor. Since a single neighbor is taken as reference, the information stemming from other neighbors is neglected, which begets the consideration of alternative, possibly more realistic approaches. Here we show that strategy changes inspired not only by the performance of individual neighbors but rather by entire neighborhoods introduce a qualitatively different evolutionary dynamics that is able to support the stable existence of very small cooperative clusters. This leads to phase diagrams that differ significantly from those obtained by means of pairwise strategy updating. In particular, the survivability of cooperators is possible even by high temptations to defect and over a much wider uncertainty range. We support the simulation results by means of pair approximations and analysis of spatial patterns, which jointly highlight the importance of local information for the resolution of social ...

  5. Synchronization of Boolean Networks with Different Update Schemes.

    Science.gov (United States)

    Zhang, Hao; Wang, Xingyuan; Lin, Xiaohui

    2014-01-01

    In this paper, the synchronizations of Boolean networks with different update schemes (synchronized Boolean networks and asynchronous Boolean networks) are investigated. All nodes in Boolean network are represented in terms of semi-tensor product. First, we give the concept of inner synchronization and observe that all nodes in a Boolean network are synchronized with each other. Second, we investigate the outer synchronization between a driving Boolean network and a corresponding response Boolean network. We provide not only the concept of traditional complete synchronization, but also the anti-synchronization and get the anti-synchronization in simulation. Third, we extend the outer synchronization to asynchronous Boolean network and get the complete synchronization between an asynchronous Boolean network and a response Boolean network. Consequently, theorems for synchronization of Boolean networks and asynchronous Boolean networks are derived. Examples are provided to show the correctness of our theorems.

  6. The use of nanoparticles in electroanalysis: an updated review.

    Science.gov (United States)

    Campbell, Fallyn W; Compton, Richard G

    2010-01-01

    The use of nanoparticles in electroanalysis is an area of research which is continually expanding. A wealth of research is available discussing the synthesis, characterization and application of nanoparticles. The unique properties of nanoparticulate materials (e.g. enhanced mass transport, high surface area, improved signal-to-noise ratio) can often be advantageous in electroanalytical techniques. The aim of this paper is to provide an updated overview of the work in this field. In this review we have concentrated on the advances with regards to silver, gold, platinum, palladium, ruthenium, copper and nickel. The synthesis, characterization and practical application of these materials are discussed. We have also identified the conditions under which each metal is likely to be stable, which is likely to be a useful tool for those practising in the field. Furthermore, we have provided a theoretical overview of advances in the theoretical modelling and simulation of nanoparticle behaviour.

  7. Updating beliefs and combining evidence in adaptive forest management under climate change

    DEFF Research Database (Denmark)

    Yousefpour, Rasoul; Temperli, Christian; Bugmann, Harald;

    2013-01-01

    We study climate uncertainty and how managers' beliefs about climate change develop and influence their decisions. We develop an approach for updating knowledge and beliefs based on the observation of forest and climate variables and illustrate its application for the adaptive management of an even......-aged Norway spruce (Picea abies L. Karst) forest in the Black Forest, Germany. We simulated forest development under a range of climate change scenarios and forest management alternatives. Our analysis used Bayesian updating and Dempster's rule of combination to simulate how observations of climate and forest...... variables may influence a decision maker's beliefs about climate development and thereby management decisions. While forest managers may be inclined to rely on observed forest variables to infer climate change and impacts, we found that observation of climate state, e.g. temperature or precipitation...

  8. Acceleration of Uncertainty Updating in the Description of Transport Processes in Heterogeneous Materials

    CERN Document Server

    Kucerova, A; Rosic, B; Matthies, H G

    2011-01-01

    The prediction of thermo-mechanical behaviour of heterogeneous materials such as heat and moisture transport is strongly influenced by the uncertainty in parameters. Such materials occur e.g. in historic buildings, and the durability assessment of these therefore needs a reliable and probabilistic simulation of transport processes, which is related to the suitable identification of material parameters. In order to include expert knowledge as well as experimental results, one can employ an updating procedure such as Bayesian inference. The classical probabilistic setting of the identification process in Bayes's form requires the solution of a stochastic forward problem via computationally expensive sampling techniques, which makes the method almost impractical. In this paper novel stochastic computational techniques such as the stochastic Galerkin method are applied in order to accelerate the updating procedure. The idea is to replace the computationally expensive forward simulation via the conventional finite...

  9. The 2016 database issue of Nucleic Acids Research and an updated molecular biology database collection.

    Science.gov (United States)

    Rigden, Daniel J; Fernández-Suárez, Xosé M; Galperin, Michael Y

    2016-01-04

    The 2016 Database Issue of Nucleic Acids Research starts with overviews of the resources provided by three major bioinformatics centers, the U.S. National Center for Biotechnology Information (NCBI), the European Bioinformatics Institute (EMBL-EBI) and Swiss Institute for Bioinformatics (SIB). Also included are descriptions of 62 new databases and updates on 95 databases that have been previously featured in NAR plus 17 previously described elsewhere. A number of papers in this issue deal with resources on nucleic acids, including various kinds of non-coding RNAs and their interactions, molecular dynamics simulations of nucleic acid structure, and two databases of super-enhancers. The protein database section features important updates on the EBI's Pfam, PDBe and PRIDE databases, as well as a variety of resources on pathways, metabolomics and metabolic modeling. This issue also includes updates on popular metagenomics resources, such as MG-RAST, EBI Metagenomics, and probeBASE, as well as a newly compiled Human Pan-Microbe Communities database. A significant fraction of the new and updated databases are dedicated to the genetic basis of disease, primarily cancer, and various aspects of drug research, including resources for patented drugs, their side effects, withdrawn drugs, and potential drug targets. A further six papers present updated databases of various antimicrobial and anticancer peptides. The entire Database Issue is freely available online on the Nucleic Acids Research website (http://nar.oxfordjournals.org/). The NAR online Molecular Biology Database Collection, http://www.oxfordjournals.org/nar/database/c/, has been updated with the addition of 88 new resources and removal of 23 obsolete websites, which brought the current listing to 1685 databases.

  10. Identifying null meta-analyses that are ripe for updating

    Directory of Open Access Journals (Sweden)

    Fang Manchun

    2003-07-01

    Full Text Available Abstract Background As an increasingly large number of meta-analyses are published, quantitative methods are needed to help clinicians and systematic review teams determine when meta-analyses are not up to date. Methods We propose new methods for determining when non-significant meta-analytic results might be overturned, based on a prediction of the number of participants required in new studies. To guide decision making, we introduce the "new participant ratio", the ratio of the actual number of participants in new studies to the predicted number required to obtain statistical significance. A simulation study was conducted to study the performance of our methods and a real meta-analysis provides further evidence. Results In our three simulation configurations, our diagnostic test for determining whether a meta-analysis is out of date had sensitivity of 55%, 62%, and 49% with corresponding specificity of 85%, 80%, and 90% respectively. Conclusions Simulations suggest that our methods are able to detect out-of-date meta-analyses. These quick and approximate methods show promise for use by systematic review teams to help decide whether to commit the considerable resources required to update a meta-analysis. Further investigation and evaluation of the methods is required before they can be recommended for general use.

  11. Silicone Gel-Filled Breast Implants: Updated Safety Information

    Science.gov (United States)

    ... For Consumers Home For Consumers Consumer Updates Silicone Gel-Filled Breast Implants: Updated Safety Information Share Tweet ... When the Food and Drug Administration allowed silicone gel-filled breast implants back on the market in ...

  12. The value of information updating in new product development

    CERN Document Server

    Artmann, Christian

    2009-01-01

    This work shows how managing uncertainty in new product development can be improved by conducting an information update during the development process. The book details the comprehensive model needed to perform that information update.

  13. Sublingual immunotherapy: World Allergy Organization position paper 2013 update

    NARCIS (Netherlands)

    G.W. Canonica (Giorgio Walter); L. Cox (Linda); R. Pawankar (Ruby); C.E. Baena-Cagnani (Carlos); M.S. Blaiss (Michael); S. Bonini (Sergio); J. Bousquet (Jean); M. Calderon (Moises); E. Compalati (Enrico); S.R. Durham (Stephen); R. Gerth van Wijk (Roy); D. Larenas-Linnemann (Désirée); H. Nelson (Harold); G. Passalacqua (Giovanni); O. Pfaar (Oliver); K. Rosario (Karyna); D. Ryan (Dermot); L. Rosenwasser (Lanny); P. Schmid-Grendelmeier (Peter); G.E. Senna (Gianenrico); E. Valovirta (Erkka); H.P. van Bever (Hugo); P. Vichyanond (Pakit); U. Wahn (Ulrich); O.M. Yusuf (Osman)

    2014-01-01

    textabstractWe have prepared this document, "Sublingual Immunotherapy: World Allergy Organization Position Paper 2013 Update", according to the evidence-based criteria, revising and updating chapters of the originally published paper, "Sublingual Immunotherapy: World Allergy Organization Position Pa

  14. Rebuild America partner update, November--December 1998

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-11-01

    This issue of the update includes articles on retrofitting Duke University facilities, energy efficiency updates to buildings in Portland, Oregon, Salisbury, North Carolina, Hawaii, Roanoke-Chowan, Virginia, and energy savings centered designs for lighting systems.

  15. Legislative Update, June 2010. Report 10-13

    Science.gov (United States)

    Blair, Julia

    2010-01-01

    This update contains analyses of legislation being tracked by California Postsecondary Education Commission (CPEC) staff. It has updated positions on bills as adopted in the Commission meeting on June 8. A matrix of bills tracked by CPEC staff is included.

  16. News and Features Updates from USA.gov

    Data.gov (United States)

    General Services Administration — Stay on top of important government news and information with the USA.gov Updates: News and Features RSS feed. We'll update this feed when we add news and featured...

  17. Sublingual immunotherapy: World Allergy Organization position paper 2013 update

    NARCIS (Netherlands)

    G.W. Canonica (Giorgio Walter); L. Cox (Linda); R. Pawankar (Ruby); C.E. Baena-Cagnani (Carlos); M.S. Blaiss (Michael); S. Bonini (Sergio); J. Bousquet (Jean); M. Calderon (Moises); E. Compalati (Enrico); S.R. Durham (Stephen); R. Gerth van Wijk (Roy); D. Larenas-Linnemann (Désirée); H. Nelson (Harold); G. Passalacqua (Giovanni); O. Pfaar (Oliver); K. Rosario (Karyna); D. Ryan (Dermot); L. Rosenwasser (Lanny); P. Schmid-Grendelmeier (Peter); G.E. Senna (Gianenrico); E. Valovirta (Erkka); H.P. van Bever (Hugo); P. Vichyanond (Pakit); U. Wahn (Ulrich); O.M. Yusuf (Osman)

    2014-01-01

    textabstractWe have prepared this document, "Sublingual Immunotherapy: World Allergy Organization Position Paper 2013 Update", according to the evidence-based criteria, revising and updating chapters of the originally published paper, "Sublingual Immunotherapy: World Allergy Organization Position

  18. Update to the Coordinated Framework for the Regulation of Biotechnology

    Science.gov (United States)

    This Update to the Coordinated Framework for the Regulation of Biotechnology updates earlier versions from 1986 and 1992 is intended to clarify the current roles and responsibilities of agencies involved in the regulation of biotechnology products.

  19. Orion Pad Abort 1 Flight Test: Simulation Predictions Versus Flight Data

    Science.gov (United States)

    Stillwater, Ryan Allanque; Merritt, Deborah S.

    2011-01-01

    The presentation covers the pre-flight simulation predictions of the Orion Pad Abort 1. The pre-flight simulation predictions are compared to the Orion Pad Abort 1 flight test data. Finally the flight test data is compared to the updated simulation predictions, which show a ove rall improvement in the accuracy of the simulation predictions.

  20. 2015 Update of the Discoveries of Isotopes

    CERN Document Server

    Thoennessen, M

    2016-01-01

    The 2015 update of the discovery of nuclide project is presented. Twenty new nuclides were observed for the first time in 2015. An overall review of all previous assignments was made in order to apply the discovery criteria consistently to all elements. In addition, a list of isotopes published so far only in conference proceedings or internal reports is included.

  1. Bangladesh Quarterly Economic Update - December 2014

    OpenAIRE

    Asian Development Bank

    2015-01-01

    The Bangladesh Quarterly Economic Update (QEU) has been produced by the Bangladesh Resident Mission of the Asian Development Bank since March 2001. The QEU provides information and analysis on Bangladesh’s macroeconomic and sector developments, key development challenges, and policy and institutional reforms. The QEU has wide readership in government, academia, development partners, private sector, and civil society.

  2. Bangladesh Quarterly Economic Update June 2014

    OpenAIRE

    Asian Development Bank

    2014-01-01

    The Bangladesh Quarterly Economic Update (QEU) has been produced by the Bangladesh Resident Mission of the Asian Development Bank since March 2001. The QEU provides information and analysis on Bangladesh’s macroeconomic and sector developments, key development challenges, and policy and institutional reforms. The QEU has wide readership in government, academia, development partners, private sector, and civil society.

  3. Bangladesh Quarterly Economic Update September 2014

    OpenAIRE

    Asian Development Bank

    2014-01-01

    The Bangladesh Quarterly Economic Update (QEU) has been produced by the Bangladesh Resident Mission of the Asian Development Bank since March 2001. The QEU provides information and analysis on Bangladesh’s macroeconomic and sector developments, key development challenges, and policy and institutional reforms. The QEU has wide readership in government, academia, development partners, private sector, and civil society.

  4. American Automobile and Light Truck Statistics Update

    Science.gov (United States)

    Feldman, Bernard J.

    2014-01-01

    Given that transportation is an essential topic in any Physics and Society or Energy course, it is necessary to have useful statistics on transportation in order to have a reasoned discussion on this topic. And a major component of the transportation picture is the automobile. This paper presents updated transportation statistics for American…

  5. American Automobile and Light Truck Statistics Update

    Science.gov (United States)

    Feldman, Bernard J.

    2014-01-01

    Given that transportation is an essential topic in any Physics and Society or Energy course, it is necessary to have useful statistics on transportation in order to have a reasoned discussion on this topic. And a major component of the transportation picture is the automobile. This paper presents updated transportation statistics for American…

  6. Sri Lanka Development Update, Fall 2016

    OpenAIRE

    2016-01-01

    The Sri Lanka development update report talks about the recent economic developments in Sri Lanka for the year 2015-2016. With no exception, Sri Lanka also faced the challenges of a trying global environment in 2015. Uncertainties in an election year that saw a major political transition contributed to elevate the risks stemming from global context. The accommodative policy choices supported ...

  7. 2016 updated MASCC/ESMO consensus recommendations

    DEFF Research Database (Denmark)

    Roila, Fausto; Warr, David; Hesketh, Paul J

    2017-01-01

    PURPOSE: An update of the recommendations for the prophylaxis of acute and delayed emesis induced by moderately emetogenic chemotherapy published after the last MASCC/ESMO antiemetic consensus conference in 2009 has been carried out. METHODS: A systematic literature search using PubMed from Janua...

  8. 2016 Updated MASCC/ESMO Consensus Recommendations

    DEFF Research Database (Denmark)

    Olver, Ian; Ruhlmann, Christina H.; Jahn, Franziska

    2017-01-01

    Purpose: The purpose of this review is to update the MASCC (Multinational Association of Supportive Care in Cancer) guidelines for controlling nausea and vomiting with chemotherapy of low or minimal emetic potential. Methods: The antiemetic study group of MASCC met in Copenhagen in 2015 to review...

  9. 2016 updated MASCC/ESMO consensus recommendations

    DEFF Research Database (Denmark)

    Ruhlmann, Christina H.; Jahn, Franziska; Jordan, Karin

    2017-01-01

    Purpose: Radiotherapy-induced nausea and vomiting (RINV) are distressing symptoms. Evidence-based guidelines should facilitate the prescription of the best possible antiemetic prophylaxis. As part of the MASCC/ESMO Antiemetic Guidelines Update 2016, a thorough review of the literature concerning...

  10. Young Children in Poverty: A Statistical Update.

    Science.gov (United States)

    Bennett, Neil G.; Li, Jiali; Song, Younghwan; Yang, Keming

    This document continues a series of statistical reports from the National Center for Children in Poverty about young child poverty in the United States. The highlights of this update include the current profile of extremely poor, poor, and near poor population of young children; an examination of the changing association between higher education…

  11. Treatment of advanced seminoma : An update

    NARCIS (Netherlands)

    Sleijfer, DT; Mulder, NH

    In this update, the recent developments in the treatment of patients with advanced seminoma are reviewed. Also, the approach for patients with residual disease after chemotherapy is described. It is concluded that the combination of etoposide and cisplatin seems to be the standard treatment for

  12. Discourse Updating after Reading a Counterfactual Event

    Science.gov (United States)

    de Vega, Manuel; Urrutia, Mabel

    2012-01-01

    This paper explores the temporal course of discourse updating after reading counterfactual events. To test the accessibility to discourse information, readers were asked to identify probes related to initial events in the text, previous to the counterfactual, or probes related to the critical counterfactual events. Experiment 1 showed that 500 ms…

  13. Optimizing Key Updates in Sensor Networks

    DEFF Research Database (Denmark)

    Yuksel, Ender; Nielson, Hanne Riis; Nielson, Flemming

    2011-01-01

    Sensor networks offer the advantages of simple and low–resource communication. Nevertheless, security is of particular importance in many cases such as when sensitive data is communicated or tamper-resistance is required. Updating the security keys is one of the key points in security, which rest...

  14. Update in cardiomyopathies and congestive heart failure

    Directory of Open Access Journals (Sweden)

    The Heart Hospital, London, UK and Monaldi Hospital, Naples, Italy

    2012-05-01

    Full Text Available This abstract book contains four reports and all abstracts presented to the Joint Meeting: Update in cardiomyopathies and congestive heart failure, 22-23 September 2011 - Naples, Italy, endorsed by the Working Group on Myocardial and Pericardial Diseases (WG 21 of the European Society of Cardiology (ESC.

  15. November 6, 2014 CDC Ebola Response Update

    Centers for Disease Control (CDC) Podcasts

    2014-11-06

    This podcast provides an update on the Ebola response, as of November 6, 2014.  Created: 11/6/2014 by National Center for Emerging and Zoonotic Infectious Diseases (NCEZID).   Date Released: 11/6/2014.

  16. December 17, 2014 CDC Ebola Response Update

    Centers for Disease Control (CDC) Podcasts

    2014-12-17

    This podcast provides an update on the Ebola response, as of December 17, 2014. It briefly describes CDC's "Operation Care Package.".  Created: 12/17/2014 by CDC’s Office of the Associate Director for Communication.   Date Released: 12/17/2014.

  17. November 19, 2014 CDC Ebola Response Update

    Centers for Disease Control (CDC) Podcasts

    2014-11-19

    This podcast provides an update on the Ebola response, as of November 19, 2014.  Created: 11/19/2014 by National Center for Emerging and Zoonotic Infectious Diseases (NCEZID).   Date Released: 11/19/2014.

  18. November 26, 2014 CDC Ebola Response Update

    Centers for Disease Control (CDC) Podcasts

    2014-11-26

    This podcast provides an update on the Ebola response, as of November 26, 2014. In this podcast, learn how CDC’s communications teams acknowledge the widespread fear of Ebola in messaging.  Created: 11/26/2014 by National Center for Emerging and Zoonotic Infectious Diseases (NCEZID).   Date Released: 11/26/2014.

  19. December 12, 2014 CDC Ebola Response Update

    Centers for Disease Control (CDC) Podcasts

    2014-12-12

    This podcast provides an update on the Ebola response, as of December 12, 2014. In this podcast, learn how some West African communities are celebrating their Ebola survivors.  Created: 12/12/2014 by CDC’s Office of the Associate Director for Communication.   Date Released: 12/12/2014.

  20. October 31, 2014 CDC Ebola Response Update

    Centers for Disease Control (CDC) Podcasts

    2014-10-31

    This podcast provides an update on the Ebola response, as of October 31, 2014.  Created: 10/31/2014 by National Center for Emerging and Zoonotic Infectious Diseases (NCEZID).   Date Released: 10/31/2014.

  1. November 14, 2014 CDC Ebola Response Update

    Centers for Disease Control (CDC) Podcasts

    2014-11-14

    This podcast provides an update on the Ebola response, as of November 14, 2014.  Created: 11/14/2014 by National Center for Emerging and Zoonotic Infectious Diseases (NCEZID).   Date Released: 11/14/2014.

  2. Clinical update on nursing home medicine: 2012.

    Science.gov (United States)

    Messinger-Rapport, Barbara J; Cruz-Oliver, Dulce M; Thomas, David R; Morley, John E

    2012-09-01

    This article is the sixth in the series of clinical updates on nursing home care. The topics covered are management of hypertension, antidepressant medications in people with dementia, peripheral arterial disease, probiotics in prevention, and treatment of Clostridium difficile-associated diarrhea, frailty, and falls.

  3. Updated Abraham solvation parameters for polychlorinated biphenyls

    NARCIS (Netherlands)

    van Noort, P.C.M.; Haftka, J.J.H.; Parsons, J.R.

    2010-01-01

    This study shows that the recently published polychlorinated biphenyl (PCB) Abraham solvation parameters predict PCB air−n-hexadecane and n-octanol−water partition coefficients very poorly, especially for highly ortho-chlorinated congeners. Therefore, an updated set of PCB solvation parameters was d

  4. [WWW.2CHEAT.COM] Update

    Science.gov (United States)

    Rooks, Clay D.

    2006-01-01

    This paper is an updated presentation on the subject of cheating and plagiarism via the World Wide Web. In a few hours searching the Internet, the author found even more "cheat" sites than in 1998 that offered not only all types of term and research papers, but college admission letters, reviews, case studies, even dissertations as well. Most now…

  5. Update of the exploratory report Acrolein

    NARCIS (Netherlands)

    Slooff W; Bont PFH; Janus JA; Pronk MEJ; Ros JPM; ECO; PPCbv; ACT; LAE

    1994-01-01

    The report is an update of the exploratory report acrolein (Slooff et al., 1991) that served as a basis for the discussion during the exploratory meeting on acrolein in March 1992. The meeting supported the conclusion that priority should be given to the compartment air and to the risks to humans.

  6. Update of the CERN exchange switches

    CERN Multimedia

    2005-01-01

    In the context of the telephony services improvements, an update of the CERN exchange switches will be performed on Thursday 28 April from 7.00 p.m. until midnight. Disturbances or even disruptions of telephony services may occur during this intervention

  7. Lake Erie phosphorus loading and Cladophora updates

    Science.gov (United States)

    The presentation will focus on updates or progress being made on each Phosphorus Loadings and Cladophora for Lake Erie. The format will give a brief summary of data, findings, and results that were used by the Great Lakes Water Quality Agreement (GLWQA) Annex 4 Nutrients Modeli...

  8. Properties and Update Semantics of Consistent Views

    Science.gov (United States)

    1985-09-01

    8217 PR.OPERTIES AND UPDATE SEMANTICS OF CONSISTENT VIEWS G. Gottlob Institute for Applied Mathematics C.N.H.., G<•nova, Italy Compnt.<•r Sden... Gottlob G., Paolini P., Zicari R., "Proving Properties of Programs ou Database Views", Dipartiuwnto di Elcttronica, Politecnko di Milano (in

  9. Update on Co-Design @ Los Alamos

    Energy Technology Data Exchange (ETDEWEB)

    McPherson, Allen L. [Los Alamos National Laboratory

    2012-06-11

    We present an update on current co-design work at LANL. We describe three non-ASC co-design projects: CoCoMANS (LDRD), ExMatEx (ASCR) and the Co-Design Summer School (IS and T). For each project we give a brief overview of the project plans and status.

  10. Copyright Updates for K-12 Librarians

    Science.gov (United States)

    Johnson, Wendell G.

    2016-01-01

    Copyright concerns continue to bedevil K-12 librarians, who are often called upon to act as the copyright officers in public schools. This article describes recent copyright developments of concern to these librarians in three areas: a recent court case involving a university library, pending legislation supported by ALA, and a regulatory update.…

  11. Perception and Change in Update Logic

    NARCIS (Netherlands)

    Eijck, D.J.N. van; Eijck, D.J.N. van; Verbrugge, R.

    2011-01-01

    Abstract Three key ways of updating one's knowledge are (i) perception of states of affairs, e.g., seeing with one's own eyes that something is the case, (ii) recep- tion of messages, e.g., being told that something is the case, and (iii) drawing new conclusions from known facts. If one represents k

  12. Perception and Change in Update Logic

    NARCIS (Netherlands)

    Eijck, D.J.N. van; Verbrugge, R.

    2012-01-01

    Three key ways of updating one's knowledge are (i) perception of states of affairs, e.g., seeing with one's own eyes that something is the case, (ii) reception of messages, e.g., being told that something is the case, and (iii) drawing new conclusions from known facts. If one represents knowledge b

  13. Traffic Flow Management: Data Mining Update

    Science.gov (United States)

    Grabbe, Shon R.

    2012-01-01

    This presentation provides an update on recent data mining efforts that have been designed to (1) identify like/similar days in the national airspace system, (2) cluster/aggregate national-level rerouting data and (3) apply machine learning techniques to predict when Ground Delay Programs are required at a weather-impacted airport

  14. Irreversible Simulated Tempering

    Science.gov (United States)

    Sakai, Yuji; Hukushima, Koji

    2016-10-01

    An extended ensemble Monte Carlo algorithm is proposed by introducing a violation of the detailed balance condition to the update scheme of the inverse temperature in simulated tempering. Our method, irreversible simulated tempering, is constructed on the basis of the framework of the skew detailed balance condition. By applying this method to the ferromagnetic Ising model in two dimensions on a square lattice as a benchmark, the dynamical behavior of the inverse temperature and an autocorrelation function of the magnetization are studied numerically. It is found that the relaxation dynamics of the inverse temperature qualitatively change from diffusive to ballistic on violating the detailed balance condition. Consequently, the autocorrelation time of the magnetization is several times smaller than that for the conventional algorithm satisfying the detailed balance condition.

  15. Petroleum software profiles: an update

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1998-05-01

    Computer software for the petroleum industry developed by various consulting and oil field services companies were described. A system for mapping and analysis in real time (S.M.A.R.T.), combining advanced information technology, advanced geostatistics and high levels of 3-D graphics capability, was developed by United Oil and Gas Consulting Ltd of Calgary. It is a multi-disciplinary tool, incorporating geoscientific concepts to build a spatial earth model of reservoirs, simplifying horizontal and vertical well planning and analysis, and allowing for the incorporation of 3-D seismic structure. Another company, Schlumberger Geoquest, provides the industry with data services and software products to maximize the value of exploration and production data. Their `Geoframe` systems cover a spectrum of reservoir characterization disciplines to enable detailed interpretation and integration of data from petrophysics, geology and geophysics. Among the Goequest software solutions a number of reservoir simulators (Eclipse 100, 300, 500), well log analysis software (QLA), software for integrating solutions for rock and reserves (CADE Office), and software for well analysis applications (PA/OFM) were highlighted. Geoquest`s wide range of data processing and interpretation, reservoir pressure and flow evaluation, mapping and cartography services, and leased systems, were also reviewed.

  16. 7. Mentor update and support: what do mentors need from an update?

    Science.gov (United States)

    Phillips, Mari; Marshall, Joyce

    2015-04-01

    Mentorship is the 14th series of 'Midwifery basics' targeted at practising midwives. The aim of these articles is to provide information to raise awareness of the impact of the work of midwives on women's experience, and encourage midwives to seek further information through a series of activities relating to the topic. In this seventh article Mari Phillips and Joyce Marshall consider some of the key issues related to mentor update and support and consider what mentors need from their annual update.

  17. Dynamic Data Updating Algorithm for Image Superresolution Reconstruction

    Institute of Scientific and Technical Information of China (English)

    TAN Bing; XU Qing; ZHANG Yan; XING Shuai

    2006-01-01

    A dynamic data updating algorithm for image superesolution is proposed. On the basis of Delaunay triangulation and its local updating property, this algorithm can update the changed region directly under the circumstances that only a part of the source images has been changed. For its high efficiency and adaptability, this algorithm can serve as a fast algorithm for image superesolution reconstruction.

  18. 76 FR 28194 - Proposed FOIA Fee Schedule Update

    Science.gov (United States)

    2011-05-16

    ... SAFETY BOARD 10 CFR Part 1703 Proposed FOIA Fee Schedule Update AGENCY: Defense Nuclear Facilities Safety... (FOIA) Fee Schedule Update and solicits comments from interested organizations and individual members of... regulations, the Board's General Manager will update the FOIA Fee Schedule once every 12 months. Previous...

  19. 42 CFR 414.30 - Conversion factor update.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 3 2010-10-01 2010-10-01 false Conversion factor update. 414.30 Section 414.30... Practitioners § 414.30 Conversion factor update. Unless Congress acts in accordance with section 1848(d)(3) of the Act— (a) General rule. The CF update for a CY equals the Medicare Economic Index increased...

  20. 77 FR 32433 - Proposed FOIA Fee Schedule Update

    Science.gov (United States)

    2012-06-01

    ... NUCLEAR FACILITIES SAFETY BOARD 10 CFR Part 1703 Proposed FOIA Fee Schedule Update AGENCY: Defense Nuclear... Freedom of Information Act (FOIA) Fee Schedule Update and solicits comments from interested organizations...) of the Board's regulations, the Board's General Manager will update the FOIA Fee Schedule once...

  1. 10 CFR 474.5 - Review and Update

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 3 2010-01-01 2010-01-01 false Review and Update 474.5 Section 474.5 Energy DEPARTMENT OF...; PETROLEUM-EQUIVALENT FUEL ECONOMY CALCULATION § 474.5 Review and Update The Department will review Part 474 five years after the date of publication as a final rule to determine whether any updates...

  2. 75 FR 27228 - Proposed FOIA Fee Schedule Update

    Science.gov (United States)

    2010-05-14

    ... SAFETY BOARD 10 CFR Part 1703 Proposed FOIA Fee Schedule Update AGENCY: Defense Nuclear Facilities Safety... (FOIA) Fee Schedule Update and solicits comments from interested organizations and individual members of... regulations, the Board's General Manager will update the FOIA Fee Schedule once every 12 months. Previous...

  3. 40 CFR 68.36 - Review and update.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 15 2010-07-01 2010-07-01 false Review and update. 68.36 Section 68.36... ACCIDENT PREVENTION PROVISIONS Hazard Assessment § 68.36 Review and update. (a) The owner or operator shall review and update the offsite consequence analyses at least once every five years. (b) If changes...

  4. Impact of deterministic and stochastic updates on network reciprocity in the prisoner's dilemma game.

    Science.gov (United States)

    Tanimoto, Jun

    2014-08-01

    In 2 × 2 prisoner's dilemma games, network reciprocity is one mechanism for adding social viscosity, which leads to cooperative equilibrium. This study introduced an intriguing framework for the strategy update rule that allows any combination of a purely deterministic method, imitation max (IM), and a purely probabilistic one, pairwise Fermi (Fermi-PW). A series of simulations covering the whole range from IM to Fermi-PW reveals that, as a general tendency, the larger fractions of stochastic updating reduce network reciprocity, so long as the underlying lattice contains no noise in the degree of distribution. However, a small amount of stochastic flavor added to an otherwise perfectly deterministic update rule was actually found to enhance network reciprocity. This occurs because a subtle stochastic effect in the update rule improves the evolutionary trail in games having more stag-hunt-type dilemmas, although the same stochastic effect degenerates evolutionary trails in games having more chicken-type dilemmas. We explain these effects by dividing evolutionary trails into the enduring and expanding periods defined by Shigaki et al. [Phys. Rev. E 86, 031141 (2012)].

  5. An Update based Energy-Efficient Reactive Routing Protocol for Mobile Ad Hoc Networks

    Directory of Open Access Journals (Sweden)

    Dhirendra Kumar Sharma

    2013-09-01

    Full Text Available Low cost energy-efficient (power based routing protocols of mobile ad hoc networks (MANETs increase the lifetime of static networks by using received signal strength (RSS and battery power status (PS. They require GPS service to find the exact location of mobile nodes. The GPS devices themselves consume power because they need excessive updates to find the stationary nodes for efficient routing. To overcome this, RSS is being used as a metric, followed by, residual battery power. The recent protocols, based on these concepts, provide energy efficient routes during the route discovery phase only. Topological changes make these routes weak in due course of time. To update routes, HELLO process can be used, which however creates unnecessary overhead, delay and consumes power. Hence, these protocols do not update the routes. We propose an energy-efficient reactive routing protocol that uses the RSS and PS of mobile nodes. Proposed Link Failure Prediction (LFP algorithm uses the link-layer feedback system to update active routes. We use ns2 for simulation of the proposed algorithm. Comparing the results of proposed scheme and existing scheme, in terms of energy consumption, link failure probability, and retransmission of packets, we observe that the proposed scheme outperforms the existing one.

  6. Dynamic causal modelling of electrographic seizure activity using Bayesian belief updating.

    Science.gov (United States)

    Cooray, Gerald K; Sengupta, Biswa; Douglas, Pamela K; Friston, Karl

    2016-01-15

    Seizure activity in EEG recordings can persist for hours with seizure dynamics changing rapidly over time and space. To characterise the spatiotemporal evolution of seizure activity, large data sets often need to be analysed. Dynamic causal modelling (DCM) can be used to estimate the synaptic drivers of cortical dynamics during a seizure; however, the requisite (Bayesian) inversion procedure is computationally expensive. In this note, we describe a straightforward procedure, within the DCM framework, that provides efficient inversion of seizure activity measured with non-invasive and invasive physiological recordings; namely, EEG/ECoG. We describe the theoretical background behind a Bayesian belief updating scheme for DCM. The scheme is tested on simulated and empirical seizure activity (recorded both invasively and non-invasively) and compared with standard Bayesian inversion. We show that the Bayesian belief updating scheme provides similar estimates of time-varying synaptic parameters, compared to standard schemes, indicating no significant qualitative change in accuracy. The difference in variance explained was small (less than 5%). The updating method was substantially more efficient, taking approximately 5-10min compared to approximately 1-2h. Moreover, the setup of the model under the updating scheme allows for a clear specification of how neuronal variables fluctuate over separable timescales. This method now allows us to investigate the effect of fast (neuronal) activity on slow fluctuations in (synaptic) parameters, paving a way forward to understand how seizure activity is generated.

  7. Grackle: Chemistry and radiative cooling library for astrophysical simulations

    Science.gov (United States)

    Smith, Britton D.; Bryan, Greg L.; Glover, Simon C. O.; Goldbaum, Nathan J.; Turk, Matthew J.; Regan, John; Wise, John H.; Schive, Hsi-Yu; Abel, Tom; Emerick, Andrew; O'Shea, Brian W.; Anninos, Peter; Hummels, Cameron B.; Khochfar, Sadegh

    2016-12-01

    The chemistry and radiative cooling library Grackle provides options for primordial chemistry and cooling, photo-heating and photo-ionization from UV backgrounds, and support for user-provided arrays of volumetric and specific heating rates for astrophysical simulations and models. The library provides functions to update chemistry species; solve radiative cooling and update internal energy; and calculate cooling time, temperature, pressure, and ratio of specific heats (gamma), and has interfaces for C, C++, Fortran, and Python codes.

  8. An update of the Death Valley regional groundwater flow system transient model, Nevada and California

    Science.gov (United States)

    Belcher, Wayne R.; Sweetkind, Donald S.; Faunt, Claudia C.; Pavelko, Michael T.; Hill, Mary C.

    2017-01-19

    Since the original publication of the Death Valley regional groundwater flow system (DVRFS) numerical model in 2004, more information on the regional groundwater flow system in the form of new data and interpretations has been compiled. Cooperators such as the Bureau of Land Management, National Park Service, U.S. Fish and Wildlife Service, the Department of Energy, and Nye County, Nevada, recognized a need to update the existing regional numerical model to maintain its viability as a groundwater management tool for regional stakeholders. The existing DVRFS numerical flow model was converted to MODFLOW-2005, updated with the latest available data, and recalibrated. Five main data sets were revised: (1) recharge from precipitation varying in time and space, (2) pumping data, (3) water-level observations, (4) an updated regional potentiometric map, and (5) a revision to the digital hydrogeologic framework model.The resulting DVRFS version 2.0 (v. 2.0) numerical flow model simulates groundwater flow conditions for the Death Valley region from 1913 to 2003 to correspond to the time frame for the most recently published (2008) water-use data. The DVRFS v 2.0 model was calibrated by using the Tikhonov regularization functionality in the parameter estimation and predictive uncertainty software PEST. In order to assess the accuracy of the numerical flow model in simulating regional flow, the fit of simulated to target values (consisting of hydraulic heads and flows, including evapotranspiration and spring discharge, flow across the model boundary, and interbasin flow; the regional water budget; values of parameter estimates; and sensitivities) was evaluated. This evaluation showed that DVRFS v. 2.0 simulates conditions similar to DVRFS v. 1.0. Comparisons of the target values with simulated values also indicate that they match reasonably well and in some cases (boundary flows and discharge) significantly better than in DVRFS v. 1.0.

  9. State Energy Price System: 1982 update

    Energy Technology Data Exchange (ETDEWEB)

    Imhoff, K.L.; Fang, J.M.

    1984-10-01

    The State Energy Price System (STEPS) contains estimates of energy prices for ten major fuels (electricity, natural gas, metallurgical coal, steam coal, distillate, motor gasoline, diesel, kerosene/jet fuel, residual fuel, and liquefied petroleum gas), by major end-use sectors (residential, commercial, industrial, transportation, and electric utility), and by state through 1982. Both physical unit prices and prices per million Btu are included in STEPS. Major changes in STEPS data base for 1981 and 1982 are described. The most significant changes in procedures for the updates occur in the residential sector distillate series and the residential sector kerosene series. All physical unit and Btu prices are shown with three significant digits instead of with four significant digits as shown in the original documentation. Details of these and other changes are contained in this report, along with the updated data files. 31 references, 65 tables.

  10. The primordial helium abundance from updated emissivities

    CERN Document Server

    Aver, Erik; Porter, R L; Skillman, Evan D

    2013-01-01

    Observations of metal-poor extragalactic H II regions allow the determination of the primordial helium abundance, Y_p. The He I emissivities are the foundation of the model of the H II region's emission. Porter, Ferland, Storey, & Detisch (2012) have recently published updated He I emissivities based on improved photoionization cross-sections. We incorporate these new atomic data and update our recent Markov Chain Monte Carlo analysis of the dataset published by Izotov, Thuan, & Stasinska (2007). As before, cuts are made to promote quality and reliability, and only solutions which fit the data within 95% confidence level are used to determine the primordial He abundance. The previously qualifying dataset is almost entirely retained and with strong concordance between the physical parameters. Overall, an upward bias from the new emissivities leads to a decrease in Y_p. In addition, we find a general trend to larger uncertainties in individual objects (due to changes in the emissivities) and an increase...

  11. Median sternotomy closure: review and update research

    Institute of Scientific and Technical Information of China (English)

    Hua Kun; Yang Xiubin

    2009-01-01

    Cardiac surgery is a very common operation nowadays all over the world. Median stemotomy is a routine procedure required for cardiac access during open heart surgery. The complications of this procedure after the cardiac surgery range from 0.7% to 1.5% of all cases, and bear a high mortality rate if they occur. Every individual surgeon must pay great attention on every detail during the sternal closure. This article shows the details as to conventional information and updated progress on median sternotomy closure. The update contents involve in biomechanics, number of wires twists, biomaterial and so on.According to our experience, we recommend four peristernal single/double steel wires for sternal closure as our optimal choice.

  12. Temporal Difference Updating without a Learning Rate

    CERN Document Server

    Hutter, Marcus

    2008-01-01

    We derive an equation for temporal difference learning from statistical principles. Specifically, we start with the variational principle and then bootstrap to produce an updating rule for discounted state value estimates. The resulting equation is similar to the standard equation for temporal difference learning with eligibility traces, so called TD(lambda), however it lacks the parameter alpha that specifies the learning rate. In the place of this free parameter there is now an equation for the learning rate that is specific to each state transition. We experimentally test this new learning rule against TD(lambda) and find that it offers superior performance in various settings. Finally, we make some preliminary investigations into how to extend our new temporal difference algorithm to reinforcement learning. To do this we combine our update equation with both Watkins' Q(lambda) and Sarsa(lambda) and find that it again offers superior performance without a learning rate parameter.

  13. The UCSC Genome Browser database: 2016 update.

    Science.gov (United States)

    Speir, Matthew L; Zweig, Ann S; Rosenbloom, Kate R; Raney, Brian J; Paten, Benedict; Nejad, Parisa; Lee, Brian T; Learned, Katrina; Karolchik, Donna; Hinrichs, Angie S; Heitner, Steve; Harte, Rachel A; Haeussler, Maximilian; Guruvadoo, Luvina; Fujita, Pauline A; Eisenhart, Christopher; Diekhans, Mark; Clawson, Hiram; Casper, Jonathan; Barber, Galt P; Haussler, David; Kuhn, Robert M; Kent, W James

    2016-01-01

    For the past 15 years, the UCSC Genome Browser (http://genome.ucsc.edu/) has served the international research community by offering an integrated platform for viewing and analyzing information from a large database of genome assemblies and their associated annotations. The UCSC Genome Browser has been under continuous development since its inception with new data sets and software features added frequently. Some release highlights of this year include new and updated genome browsers for various assemblies, including bonobo and zebrafish; new gene annotation sets; improvements to track and assembly hub support; and a new interactive tool, the "Data Integrator", for intersecting data from multiple tracks. We have greatly expanded the data sets available on the most recent human assembly, hg38/GRCh38, to include updated gene prediction sets from GENCODE, more phenotype- and disease-associated variants from ClinVar and ClinGen, more genomic regulatory data, and a new multiple genome alignment.

  14. Uncertainty for Part Density Determination: An Update

    Energy Technology Data Exchange (ETDEWEB)

    Valdez, Mario Orlando [Los Alamos National Laboratory

    2016-12-14

    Accurate and precise density measurements by hydrostatic weighing requires the use of an analytical balance, configured with a suspension system, to both measure the weight of a part in water and in air. Additionally, the densities of these liquid media (water and air) must be precisely known for the part density determination. To validate the accuracy and precision of these measurements, uncertainty statements are required. The work in this report is a revision of an original report written more than a decade ago, specifically applying principles and guidelines suggested by the Guide to the Expression of Uncertainty in Measurement (GUM) for determining the part density uncertainty through sensitivity analysis. In this work, updated derivations are provided; an original example is revised with the updated derivations and appendix, provided solely to uncertainty evaluations using Monte Carlo techniques, specifically using the NIST Uncertainty Machine, as a viable alternative method.

  15. "Updates to Model Algorithms & Inputs for the Biogenic ...

    Science.gov (United States)

    We have developed new canopy emission algorithms and land use data for BEIS. Simulations with BEIS v3.4 and these updates in CMAQ v5.0.2 are compared these changes to the Model of Emissions of Gases and Aerosols from Nature (MEGAN) and evaluated the simulations against observations. This has resulted in improvements in model evaluations of modeled isoprene, NOx, and O3. The National Exposure Research Laboratory (NERL) Atmospheric Modeling and Analysis Division (AMAD) conducts research in support of EPA mission to protect human health and the environment. AMAD research program is engaged in developing and evaluating predictive atmospheric models on all spatial and temporal scales for forecasting the air quality and for assessing changes in air quality and air pollutant exposures, as affected by changes in ecosystem management and regulatory decisions. AMAD is responsible for providing a sound scientific and technical basis for regulatory policies based on air quality models to improve ambient air quality. The models developed by AMAD are being used by EPA, NOAA, and the air pollution community in understanding and forecasting not only the magnitude of the air pollution problem, but also in developing emission control policies and regulations for air quality improvements.

  16. Single Accreditation System Update: Gaining Momentum.

    Science.gov (United States)

    Buser, Boyd R; Swartwout, James; Lischka, Terri; Biszewski, Maura; DeVine, Kathy

    2017-04-01

    In July 2014, the American Osteopathic Association House of Delegates endorsed the establishment of a new, single graduate medical education accreditation system in collaboration with the Accreditation Council for Graduate Medical Education and the American Association of Colleges of Osteopathic Medicine. Since that time, the osteopathic medical community has made substantial headway in the transition to the new system. This article provides an update on the transition.

  17. Disease mapping in veterinary parasitology: an update.

    Science.gov (United States)

    Rinaldi, L; Musella, V; Cringoli, G

    2006-06-01

    The development of methods for disease mapping has progressed considerably in recent years. Geographical Information Systems (GIS) and Remote Sensing (RS) represent new tools for the study of epidemiology, and their application to veterinary medicine, and in particular to veterinary parasitology, has become more and more advanced to study the spatial and temporal patterns of diseases. The present paper reports an update regarding the use of these technologies in veterinary parasitology.

  18. Pedophilia: an update on theory and practice.

    Science.gov (United States)

    Travin, S; Bluestone, H; Coleman, E; Cullen, K; Melella, J

    1985-01-01

    The number of sexual attacks on children is staggering, yet it is extremely difficult to understand what effective treatments are available for the pedophile by reviewing the literature. Therefore, the authors present an update of the changing conceptualizations regarding the offenders and their victims. An overview of the currently used modalities to treat the pedophile is presented with emphasis on the promising cognitive-behavioral approach. A brief description of this approach is given with two case illustrations.

  19. Taxonomy of the order Mononegavirales: update 2016

    Science.gov (United States)

    Afonso, C.L.; Kurath, Gael; 82 Additional Authors,

    2016-01-01

    In 2016, the order Mononegavirales was emended through the addition of two new families (Mymonaviridae and Sunviridae), the elevation of the paramyxoviral subfamily Pneumovirinae to family status (Pneumoviridae), the addition of five free-floating genera (Anphevirus, Arlivirus, Chengtivirus, Crustavirus, and Wastrivirus), and several other changes at the genus and species levels. This article presents the updated taxonomy of the order Mononegavirales as now accepted by the International Committee on Taxonomy of Viruses (ICTV).

  20. Genome Update: alignment of bacterial chromosomes

    DEFF Research Database (Denmark)

    Ussery, David; Jensen, Mette; Poulsen, Tine Rugh

    2004-01-01

    There are four new microbial genomes listed in this month's Genome Update, three belonging to Gram-positive bacteria and one belonging to an archaeon that lives at pH 0; all of these genomes are listed in Table 1⇓. The method of genome comparison this month is that of genome alignment and......, as an example, an alignment of seven Staphylococcus aureus genomes and one Staphylococcus epidermidis genome is presented....

  1. Central Bank Transparency: Causes, Consequences and Updates

    OpenAIRE

    Nergiz Dincer; Barry Eichengreen

    2009-01-01

    We present updated estimates of central bank for 100 countries up through 2006 and use them to analyze both the determinants and consequences of monetary policy transparency in an integrated econometric framework. We establish that there has been significant movement in the direction of greater central bank transparency in recent years. Transparent monetary policy arrangements are more likely in countries with strong and stable political institutions. They are more likely in democracies, with...

  2. GMRT-EoR Project Update

    Science.gov (United States)

    Chang, Tzu-Ching; GMRT-EoR Team

    2013-01-01

    The GMRT-EoR project has continued the multi-year campaign to measure the neutral hydrogen 21cm fluctuations at z=8.5, probing the reionization epoch using the Giant Metrewave Radio Telescope (GMRT) in India. We have acquired new data and continued to improve our analysis strategy and process. To cope with the stringent foreground subtraction requirement, our team has developed a new method for component separation; I will present updates on the latest analysis and future prospects.

  3. An Updated AP2 Beamline TURTLE Model

    Energy Technology Data Exchange (ETDEWEB)

    Gormley, M.; O' Day, S.

    1991-08-23

    This note describes a TURTLE model of the AP2 beamline. This model was created by D. Johnson and improved by J. Hangst. The authors of this note have made additional improvements which reflect recent element and magnet setting changes. The magnet characteristics measurements and survey data compiled to update the model will be presented. A printout of the actual TURTLE deck may be found in appendix A.

  4. Updating collection representations for federated search

    OpenAIRE

    M. Shokouhi; Baillie, M; Azzopardi, L.

    2007-01-01

    To facilitate the search for relevant information across a set of online distributed collections, a federated information retrieval system typically represents each collection, centrally, by a set of vocabularies or sampled documents. Accurate retrieval is therefore related to how precise each representation reflects the underlying content stored in that collection. As collections evolve over time, collection representations should also be updated to reflect any change, however, a current sol...

  5. Updated science systems on USCGC Healy

    Science.gov (United States)

    Chayes, D. N.; Roberts, S. D.; Arko, R. A.; Hiller, S. M.

    2008-12-01

    The USCG cutter Healy is the U.S. Arctic research icebreaker. Prior to the 2008 season, a number of upgrades and improvements were made to the science systems. These included the addition of two Bell BGM-3 marine gravity meters. The vessel's existing meterological sensors were enhanced with two RM Young model 85004 heated ultrasonic anemometers; a Paroscientific, Inc. model "MET-3A" air temperature, humidity and barometric pressure subsystem; and an RM Young model 50202 heated rain gauge. The flow through sea water system was updated with new flow meters, a SeaBird SBE45 thermosalinograph, long and a short wave radiation sensors, a Seapoint fluorometer. A Milltech Marine Smart Radio model SR161 Automatic Identification System (AIS) receiver and an updated interface to real-time winch and wire performance have been added. Our onboard real-time GIS has been updated to include real-time plotting of other ship tracks from our AIS receiver and the ability for users to save and share planned tracks. For the HLY0806 leg, we implemented a SWAP ship-to ship wireless connection for our two-ship operations with the Canadian icebreaker Louis S. St. Laurent similar to the one we implemented for our two-ship program with the Swedish icebreaker Oden in 2005. We updated our routine delivery of underway data to investigators, as well as a copy for archiving to the NSF-supported Marine Geoscience Data System (MGDS), using portable "boomerang" drives. An end-user workstation was added to accommodate increasing demand for onboard processing. Technical support for science on the Healy is supported by the U.S. National Science Foundation.

  6. Patent Statistics and IPR Laws Update Online

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Patent Statistics Beginning from No.2 of 2005 of China Patents & Trademarks, the Statistics on Patent Applications & Grants in China, previously published under the column of Statistics, will be updated online, including the monthly Statistics on Patent Applications by Patent Category, the Patent Grants by Patent Category, the Domestic Patent Applications by Province, and the Overseas Patent Applications by Country, and their yearly statistics at www.cpt.cn or www.cpahkltd.com/cn/ Publications/staten.htm...

  7. Neuman systems model in holland: an update.

    Science.gov (United States)

    Merks, André; Verberk, Frans; de Kuiper, Marlou; Lowry, Lois W

    2012-10-01

    The authors of this column, leading members of the International Neuman Systems Model Association, provide an update on the use of Neuman systems model in Holland and document the various changes in The Netherlands that have influenced the use of the model in that country. The model's link to systems theory and stress theory are discussed, as well as a shift to greater emphasis on patient self-management. The model is also linked to healthcare quality improvement and interprofessional collaboration in Holland.

  8. Taxonomy of the order Mononegavirales: update 2016

    Energy Technology Data Exchange (ETDEWEB)

    Afonso, Claudio L.; Amarasinghe, Gaya K.; Bányai, Krisztián; Bào, Yīmíng; Basler, Christopher F.; Bavari, Sina; Bejerman, Nicolás; Blasdell, Kim R.; Briand, François-Xavier; Briese, Thomas; Bukreyev, Alexander; Calisher, Charles H.; Chandran, Kartik; Chéng, Jiāsēn; Clawson, Anna N.; Collins, Peter L.; Dietzgen, Ralf G.; Dolnik, Olga; Domier, Leslie L.; Dürrwald, Ralf; Dye, John M.; Easton, Andrew J.; Ebihara, Hideki; Farkas, Szilvia L.; Freitas-Astúa, Juliana; Formenty, Pierre; Fouchier, Ron A. M.; Fù, Yànpíng; Ghedin, Elodie; Goodin, Michael M.; Hewson, Roger; Horie, Masayuki; Hyndman, Timothy H.; Jiāng, Dàohóng; Kitajima, Elliot W.; Kobinger, Gary P.; Kondo, Hideki; Kurath, Gael; Lamb, Robert A.; Lenardon, Sergio; Leroy, Eric M.; Li, Ci-Xiu; Lin, Xian-Dan; Liú, Lìjiāng; Longdon, Ben; Marton, Szilvia; Maisner, Andrea; Mühlberger, Elke; Netesov, Sergey V.; Nowotny, Norbert; Patterson, Jean L.; Payne, Susan L.; Paweska, Janusz T.; Randall, Rick E.; Rima, Bertus K.; Rota, Paul; Rubbenstroth, Dennis; Schwemmle, Martin; Shi, Mang; Smither, Sophie J.; Stenglein, Mark D.; Stone, David M.; Takada, Ayato; Terregino, Calogero; Tesh, Robert B.; Tian, Jun-Hua; Tomonaga, Keizo; Tordo, Noël; Towner, Jonathan S.; Vasilakis, Nikos; Verbeek, Martin; Volchkov, Viktor E.; Wahl-Jensen, Victoria; Walsh, John A.; Walker, Peter J.; Wang, David; Wang, Lin-Fa; Wetzel, Thierry; Whitfield, Anna E.; Xiè, Jiǎtāo; Yuen, Kwok-Yung; Zhang, Yong-Zhen; Kuhn, Jens H.

    2016-05-23

    In 2016, the order Mononegavirales was emended through the addition of two new families (Mymonaviridae and Sunviridae), the elevation of the paramyxoviral subfamily Pneumovirinae to family status (Pneumoviridae), the addition of five free-floating genera (Anphevirus, Arlivirus, Chengtivirus, Crustavirus, and Wastrivirus), and several other changes at the genus and species levels. This article presents the updated taxonomy of the order Mononegavirales as now accepted by the International Committee on Taxonomy of Viruses (ICTV).

  9. Evaluation of updated nitric acid chemistry on ozone precursors and radiative effects

    Directory of Open Access Journals (Sweden)

    K. M. Seltzer

    2015-02-01

    Full Text Available This study shows that revising the reaction rate of NO2 + HO• → HNO3 improves simulated nitrogen partitioning and adjusts the simulated radiative effects of several radiative forcing variables. Both laboratory and field study analysis have found that the reaction rate should be reduced by 13–30% from current recommendations. We evaluate the GEOS-Chem model over North America with and without the recommended update. Revising the NO2 + HO• → HNO3 rate coefficient improves model performance by increasing NOx concentrations in the upper troposphere and decreasing HNO3 throughout the troposphere. The downward revision of the NO2 + HO• → HNO3 rate increases the lifetime of NOx, increases O3 concentrations and increases the simulated radiative effects of tropospheric ozone. These findings demonstrate the influence the rate revision has on the composition of the atmosphere, the benefits it provides when compared to observations and the simulated radiative effects that the reduction induces.

  10. A model updating method for hybrid composite/aluminum bolted joints using modal test data

    Science.gov (United States)

    Adel, Farhad; Shokrollahi, Saeed; Jamal-Omidi, Majid; Ahmadian, Hamid

    2017-05-01

    The aim of this paper is to present a simple and applicable model for predicting the dynamic behavior of bolted joints in hybrid aluminum/composite structures and its model updating using modal test data. In this regards, after investigations on bolted joints in metallic structures which led to a new concept called joint affected region (JAR) published in Shokrollahi and Adel (2016), now, a doubly connective layer is established in order to simulate the bolted joint interfaces in hybrid structures. Using the proposed model, the natural frequencies of the hybrid bolted joint structure are computed and compared to the modal test results in order to evaluate and verify the new model predictions. Because of differences in the results of two approaches, the finite element (FE) model is updated based on the genetic algorithm (GA) by minimizing the differences between analytical model and test results. This is done by identifying the parameters at the JAR including isotropic Young's modulus in metallic substructure and that of anisotropic composite substructure. The updated model compared to the initial model simulates experimental results more properly. Therefore, the proposed model can be used for modal analysis of the hybrid joint interfaces in complex and large structures.

  11. Behavior of Collective Cooperation Yielded by Two Update Rules in Social Dilemmas: Combining Fermi and Moran Rules*

    Institute of Scientific and Technical Information of China (English)

    夏承遗; 王磊; 王娟; 王劲松

    2012-01-01

    We combine the Fermi and Moran update rules in the spatial prisoner's dilemma and snowdrift games to investigate the behavior of collective cooperation among agents on the regular lattice. Large-scale simulations indicate that, compared to the model with only one update rule, the the role of update dynamics should be paid more attention in cooperation behavior exhibits the richer phenomena, and the evolutionary game theory. Meanwhile, we also observe that the introduction of Moran rule, which needs to consider all neighbor's information, can markedly promote the aggregate cooperation level, that is, randomly selecting the neighbor proportional to its payoff to imitate will facilitate the cooperation among agents. Current results will contribute to further understand the cooperation dynamics and evolutionary behaviors within many biological, economic and social systems.

  12. Declarative XML Update Language Based on a Higher Data Model

    Institute of Scientific and Technical Information of China (English)

    Guo-Ren Wang; Xiao-Lin Zhang

    2005-01-01

    With the extensive use of XML in applications over the Web, how to update XML data is becoming an important issue because the role of XML has expanded beyond traditional applications in which XML is used for information exchange and data representation over the Web. So far, several languages have been proposed for updating XML data, but they are all based on lower, so-called graph-based or tree-based data models. Update requests are thus expressed in a nonintuitive and unnatural way and update statements are too complicated to comprehend. This paper presents a novel declarative XML update language which is an extension of the XML-RL query language. Compared with other existing XML update languages, it has the following features. First, it is the only XML data manipulation language based on a higher data model. Second, this language can express complex update requests at multiple levels in a hierarchy in a simple and flat way. Third, this language directly supports the functionality of updating complex objects while all other update languages do not support these operations. Lastly, most of existing languages use rename to modify attribute and element names, which is a different way from updates on value. The proposed language modifies tag names, values, and objects in a unified way by the introduction of three kinds of logical binding variables: object variables, value variables, and name variables.

  13. RUNTIME POTENTIAL UPDATER FILE(S IDENTIFICATION: DOES YOUR SOFTWARE UPDATES AUTOMATICALLY WITH APPLICATION WHITELISTING?

    Directory of Open Access Journals (Sweden)

    Janardhan Reddy

    2015-01-01

    Full Text Available One of the major hurdles to widespread usage of application whitelisting with today’s dynamically changing and updating software’s; is the static environment it creates that leaves little scope for changes to the system once whitelisting is enforced. The de-facto method to allow for trusted changes to system is to make selected executable files as trusted and allow changes made to the system through these files even when whitelisting is enforced. The problem with this is; difficulty the user faces in identifying the updater files for third party software. In this paper, we present the method to identify the potential updater files for the third party software in a Microsoft Windows environment. Further we test the method for commonly used third party software, presenting the results of experimentation and effectiveness of our approach.

  14. Updating Finite Element Model of a Wind Turbine Blade Section Using Experimental Modal Analysis Results

    DEFF Research Database (Denmark)

    Luczak, Marcin; Manzato, Simone; Peeters, Bart;

    2014-01-01

    of model parameters was selected for the model updating process. Design of experiment and response surface method was implemented to find values of model parameters yielding results closest to the experimental. The updated finite element model is producing results more consistent with the measurement...... is to validate finite element model of the modified wind turbine blade section mounted in the flexible support structure accordingly to the experimental results. Bend-twist coupling was implemented by adding angled unidirectional layers on the suction and pressure side of the blade. Dynamic test and simulations...... were performed on a section of a full scale wind turbine blade provided by Vestas Wind Systems A/S. The numerical results are compared to the experimental measurements and the discrepancies are assessed by natural frequency difference and modal assurance criterion. Based on sensitivity analysis, set...

  15. ORIGEN2: a revised and updated version of the Oak Ridge isotope generation and depletion code

    Energy Technology Data Exchange (ETDEWEB)

    Croff, A.G.

    1980-07-01

    ORIGEN2 is a versatile point depletion and decay computer code for use in simulating nuclear fuel cycles and calculating the nuclide compositions of materials contained therein. This code represents a revision and update of the original ORIGEN computer code which has been distributed world-wide beginning in the early 1970s. The purpose of this report is to give a summary description of a revised and updated version of the original ORIGEN computer code, which has been designated ORIGEN2. A detailed description of the computer code ORIGEN2 is presented. The methods used by ORIGEN2 to solve the nuclear depletion and decay equations are included. Input information necessary to use ORIGEN2 that has not been documented in supporting reports is documented.

  16. Propagation Modeling of Food Safety Crisis Information Update Based on the Multi-agent System

    Directory of Open Access Journals (Sweden)

    Meihong Wu

    2015-08-01

    Full Text Available This study propose a new multi-agent system frame based on epistemic default complex adaptive theory and use the agent based simulation and modeling the information updating process to study food safety crisis information dissemination. Then, we explore interaction effect between each agent in food safety crisis information dissemination at the current environment and mostly reveals how the government agent, food company agent and network media agent influence users confidence in food safety. The information updating process give a description on how to guide a normal spread of food safety crisis in public opinion in the current environment and how to enhance the confidence of food quality and safety of the average users.

  17. Using radar altimetry to update a large-scale hydrological model of the Brahmaputra river basin

    DEFF Research Database (Denmark)

    Finsen, F.; Milzow, Christian; Smith, R.

    2014-01-01

    Measurements of river and lake water levels from space-borne radar altimeters (past missions include ERS, Envisat, Jason, Topex) are useful for calibration and validation of large-scale hydrological models in poorly gauged river basins. Altimetry data availability over the downstream reaches...... of the Brahmaputra is excellent (17 high-quality virtual stations from ERS-2, 6 from Topex and 10 from Envisat are available for the Brahmaputra). In this study, altimetry data are used to update a large-scale Budyko-type hydrological model of the Brahmaputra river basin in real time. Altimetry measurements...... are converted to discharge using rating curves of simulated discharge versus observed altimetry. This approach makes it possible to use altimetry data from river cross sections where both in-situ rating curves and accurate river cross section geometry are not available. Model updating based on radar altimetry...

  18. Using radar altimetry to update a routing model of the Zambezi River Basin

    DEFF Research Database (Denmark)

    Michailovsky, Claire Irene B.; Bauer-Gottwein, Peter

    2012-01-01

    Satellite radar altimetry allows for the global monitoring of lakes and river levels. However, the widespread use of altimetry for hydrological studies is limited by the coarse temporal and spatial resolution provided by current altimetric missions and the fact that discharge rather than level...... is needed for hydrological applications. To overcome these limitations, altimetry river levels can be combined with hydrological modeling in a dataassimilation framework. This study focuses on the updating of a river routing model of the Zambezi using river levels from radar altimetry. A hydrological model...... of the basin was built to simulate the land phase of the water cycle and produce inflows to a Muskingum routing model. River altimetry from the ENVISAT mission was then used to update the storages in the reaches of the Muskingum model using the Extended Kalman Filter. The method showed improvements in modeled...

  19. PRINCIPAL COMPONENT DECOMPOSITION BASED FINITE ELEMENT MODEL UPDATING FOR STRAIN-RATE-DEPENDENCE NONLINEAR DYNAMIC PROBLEMS

    Institute of Scientific and Technical Information of China (English)

    GUO Qintao; ZHANG Lingmi; TAO Zheng

    2008-01-01

    Thin wall component is utilized to absorb impact energy of a structure. However, the dynamic behavior of such thin-walled structure is highly non-linear with material, geometry and boundary non-linearity. A model updating and validation procedure is proposed to build accurate finite element model of a frame structure with a non-linear thin-walled component for dynamic analysis. Design of experiments (DOE) and principal component decomposition (PCD) approach are applied to extract dynamic feature from nonlinear impact response for correlation of impact test result and FE model of the non-linear structure. A strain-rate-dependent non-linear model updating method is then developed to build accurate FE model of the structure. Computer simulation and a real frame structure with a highly non-linear thin-walled component are employed to demonstrate the feasibility and effectiveness of the proposed approach.

  20. Updating sea spray aerosol emissions in the Community Multiscale Air Quality (CMAQ model version 5.0.2

    Directory of Open Access Journals (Sweden)

    B. Gantt

    2015-05-01

    Full Text Available Sea spray aerosols (SSA impact the particle mass concentration and gas-particle partitioning in coastal environments, with implications for human and ecosystem health. Despite their importance, the emission magnitude of SSA remains highly uncertain with global estimates varying by nearly two orders of magnitude. In this study, the Community Multiscale Air Quality (CMAQ model was updated to enhance fine mode SSA emissions, include sea surface temperature (SST dependency, and reduce coastally-enhanced emissions. Predictions from the updated CMAQ model and those of the previous release version, CMAQv5.0.2, were evaluated using several regional and national observational datasets in the continental US. The updated emissions generally reduced model underestimates of sodium, chloride, and nitrate surface concentrations for an inland site of the Bay Regional Atmospheric Chemistry Experiment (BRACE near Tampa, Florida. Including SST-dependency to the SSA emission parameterization led to increased sodium concentrations in the southeast US and decreased concentrations along parts of the Pacific coast and northeastern US. The influence of sodium on the gas-particle partitioning of nitrate resulted in higher nitrate particle concentrations in many coastal urban areas due to increased condensation of nitric acid in the updated simulations, potentially affecting the predicted nitrogen deposition in sensitive ecosystems. Application of the updated SSA emissions to the California Research at the Nexus of Air Quality and Climate Change (CalNex study period resulted in modest improvement in the predicted surface concentration of sodium and nitrate at several central and southern California coastal sites. This SSA emission update enabled a more realistic simulation of the atmospheric chemistry in environments where marine air mixes with urban pollution.

  1. Fast vectorized algorithm for the Monte Carlo Simulation of the Random Field Ising Model

    CERN Document Server

    Rieger, H

    1992-01-01

    An algoritm for the simulation of the 3--dimensional random field Ising model with a binary distribution of the random fields is presented. It uses multi-spin coding and simulates 64 physically different systems simultaneously. On one processor of a Cray YMP it reaches a speed of 184 Million spin updates per second. For smaller field strength we present a version of the algorithm that can perform 242 Million spin updates per second on the same machine.

  2. Photovoltaic Shading Testbed for Module-Level Power Electronics: 2016 Performance Data Update

    Energy Technology Data Exchange (ETDEWEB)

    Deline, Chris [National Renewable Energy Lab. (NREL), Golden, CO (United States); Meydbray, Jenya [PV Evolution Labs (PVEL), Davis, CA (United States); Donovan, Matt [PV Evolution Labs (PVEL), Davis, CA (United States)

    2016-09-01

    The 2012 NREL report 'Photovoltaic Shading Testbed for Module-Level Power Electronics' provides a standard methodology for estimating the performance benefit of distributed power electronics under partial shading conditions. Since the release of the report, experiments have been conducted for a number of products and for different system configurations. Drawing from these experiences, updates to the test and analysis methods are recommended. Proposed changes in data processing have the benefit of reducing the sensitivity to measurement errors and weather variability, as well as bringing the updated performance score in line with measured and simulated values of the shade recovery benefit of distributed PV power electronics. Also, due to the emergence of new technologies including sub-module embedded power electronics, the shading method has been extended to include power electronics that operate at a finer granularity than the module level. An update to the method is proposed to account for these emerging technologies that respond to shading differently than module-level devices. The partial shading test remains a repeatable test procedure that attempts to simulate shading situations as would be experienced by typical residential or commercial rooftop photovoltaic (PV) systems. Performance data for multiple products tested using this method are discussed, based on equipment from Enphase, Solar Edge, Maxim Integrated and SMA. In general, the annual recovery of shading losses from the module-level electronics evaluated is 25-35%, with the major difference between different trials being related to the number of parallel strings in the test installation rather than differences between the equipment tested. Appendix D data has been added in this update.

  3. NEAMS update quarterly report for January - March 2012.

    Energy Technology Data Exchange (ETDEWEB)

    Bradley, K.S.; Hayes, S.; Pointer, D.; Summers, R.; Sadasivan, P.; Sun, X.; Bernholdt, D.; Miller, M.; Stewart, J. (Nuclear Engineering Division); (ORNL); (INL); (LLNL); (ORNL); (SNL); (PNNL)

    2012-05-10

    Quarterly highlights are: (1) The integration of Denovo and AMP was demonstrated in an AMP simulation of the thermo-mechanics of a complete fuel assembly; (2) Bison was enhanced with a mechanistic fuel cracking model; (3) Mechanistic algorithms were incorporated into various lower-length-scale models to represent fission gases and dislocations in UO2 fuels; (4) Marmot was improved to allow faster testing of mesoscale models using larger problem domains; (5) Component models of reactor piping were developed for use in Relap-7; (6) The mesh generator of Proteus was updated to accept a mesh specification from Moose and equations were formulated for the intermediate-fidelity Proteus-2D1D module; (7) A new pressure solver was implemented in Nek5000 and demonstrated to work 2.5 times faster than the previous solver; (8) Work continued on volume-holdup models for two fuel reprocessing operations: voloxidation and dissolution; (9) Progress was made on a pyroprocessing model and the characterization of pyroprocessing emission signatures; (10) A new 1D groundwater waste transport code was delivered to the used fuel disposition (UFD) campaign; (11) Efforts on waste form modeling included empirical simulation of sodium-borosilicate glass compositions; (12) The Waste team developed three prototypes for modeling hydride reorientation in fuel cladding during very long-term fuel storage; (13) A benchmark demonstration problem (fission gas bubble growth) was modeled to evaluate the capabilities of different meso-scale numerical methods; (14) Work continued on a hierarchical up-scaling framework to model structural materials by directly coupling dislocation dynamics and crystal plasticity; (15) New 'importance sampling' methods were developed and demonstrated to reduce the computational cost of rare-event inference; (16) The survey and evaluation of existing data and knowledge bases was updated for NE-KAMS; (17) The NEAMS Early User Program was launched; (18) The Nuclear

  4. Twenty Years On!: Updating the IEA BESTEST Building Thermal Fabric Test Cases for ASHRAE Standard 140: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Judkoff, R.; Neymark, J.

    2013-07-01

    ANSI/ASHRAE Standard 140, Standard Method of Test for the Evaluation of Building Energy Analysis Computer Programs applies the IEA BESTEST building thermal fabric test cases and example simulation results originally published in 1995. These software accuracy test cases and their example simulation results, which comprise the first test suite adapted for the initial 2001 version of Standard 140, are approaching their 20th anniversary. In response to the evolution of the state of the art in building thermal fabric modeling since the test cases and example simulation results were developed, work is commencing to update the normative test specification and the informative example results.

  5. New schedule for the update of CERN telephone network

    CERN Multimedia

    2003-01-01

    The continuation of ours tasks to update the network is scheduled as follows: Date Change type Affected area April 28 Update of switch in LHC 1 LHC 1 Point April 29 Update of switch in LHC 5 LHC 5 Point May 6 Update of switch N4 Meyrin Ouest May 8 Update of switch N6 Prévessin Site May 12 Update of switch N7 Building 39 and 40 We would like to remind you that disturbances or even interruptions of telephony services may occur from 18:30 to 00:00 on the above mentioned dates. CERN divisions are invited to avoid any change requests (set-ups, move or removals) of telephones and fax machines until 12th May. Should you need more details, please send us your questions by email to Standard.Telephone@cern.ch.

  6. CNA’s Integrated Ship Database, Fourth Quarter 2011 Update

    Science.gov (United States)

    2012-09-01

    intentionally left blank.2 Changes in this update In the Excel file Change to Excel 2010 With this update, we’ve moved from Microsoft Excel 2003 to Excel 2010... Microsoft Visual Basic for Applications window by clicking on the Visual Basic button on the Developer Tab or by using the keyboard shortcut : Alt...10 is a view of the Archive page. Under the 2011 updates, you can see two links for the December 2011 files: one for the Microsoft Excel Macro

  7. Kullback-Leibler Divergence Approach to Partitioned Update Kalman Filter

    OpenAIRE

    Raitoharju, Matti; García-Fernández, Ángel F.; Piché, Robert

    2016-01-01

    Kalman filtering is a widely used framework for Bayesian estimation. The partitioned update Kalman filter applies a Kalman filter update in parts so that the most linear parts of measurements are applied first. In this paper, we generalize partitioned update Kalman filter, which requires the use oft the second order extended Kalman filter, so that it can be used with any Kalman filter extension. To do so, we use a Kullback-Leibler divergence approach to measure the nonlinearity of the measure...

  8. Thalamocortical dysrhythmia: a theoretical update in tinnitus

    Directory of Open Access Journals (Sweden)

    Dirk eDe Ridder

    2015-06-01

    Full Text Available Tinnitus is the perception of a sound in the absence of an external sound source. Pathophysiologically it has been attributed to bottom up deafferentation and/or top down noise-cancelling deficit. Both mechanisms are proposed to alter auditory thalamocortical signal transmission resulting in thalamocortical dysrhythmia (TCD. In deafferentation, TCD is characterized by a slowing down of resting state alpha to theta activity associated with an increase in surrounding gamma activity, resulting in persisting cross-frequency coupling between theta and gamma activity. Theta burst-firing increases network synchrony and recruitment, a mechanism which might enable long range synchrony, which in turn could represent a means for finding the missing thalamocortical information and for gaining access to consciousness. Theta oscillations could function as a carrier wave to integrate the tinnitus related focal auditory gamma activity in a consciousness enabling network, as envisioned by the global workspace model. This model suggests that focal activity in the brain does not reach consciousness, except if the focal activity becomes functionally coupled to a consciousness enabling network, aka the global workspace. In limited deafferentation the missing information can be retrieved from the auditory cortical neighborhood, decreasing surround inhibition, resulting in TCD. When the deafferentation is too wide in bandwidth it is hypothesized that the missing information is retrieved from theta mediated parahippocampal auditory memory. This suggests that based on the amount of deafferentation TCD might change to parahippocampo-cortical persisting and thus pathological theta-gamma rhythm. From a Bayesian point of view, in which the brain is conceived as a prediction machine that updates its memory-based predictions through sensory updating, tinnitus is the result of a prediction error between the predicted and sensed auditory input. The decrease in sensory updating

  9. Task completion report for update DTPCON

    Energy Technology Data Exchange (ETDEWEB)

    Steinke, R.G.

    1997-09-10

    Update DTPCON programs TRAC-P Version 5.4.28 with a Namelist variable IDTPC option to input 21 timestep-control parameter constants and 3 switch control variables. The 21 timestep-control parameter constants are a defined part of the internal timestep-size control criteria. The 3 switch control variables prevent a timestep reduction when the outer iteration fails to converge, when the timestep size needs to be reduced below DTMIN, and when a backup evaluation is to be performed.

  10. THE IDAHO NATIONAL LABORATORY BERYLLIUM TECHNOLOGY UPDATE

    Energy Technology Data Exchange (ETDEWEB)

    Glen R. Longhurst

    2007-12-01

    A Beryllium Technology Update meeting was held at the Idaho National Laboratory on July 18, 2007. Participants came from the U.S., Japan, and Russia. There were two main objectives of this meeting. One was a discussion of current technologies for beryllium in fission reactors, particularly the Advanced Test Reactor and the Japan Materials Test Reactor, and prospects for material availability in the coming years. The second objective of the meeting was a discussion of a project of the International Science and Technology Center regarding treatment of irradiated beryllium for disposal. This paper highlights discussions held during that meeting and major conclusions reached

  11. Pediatric Preformed Metal Crowns - An Update

    Directory of Open Access Journals (Sweden)

    Sangameshwar Sajjanshetty

    2013-01-01

    Full Text Available Stainless Steel crowns (SSC were introduced in 1947 by the Rocky Mountain Company and popularized by Humphrey in 1950. Prefabricated SSC can be adapted to individual primary teeth and cemented in place to provide a definitive restoration. The SSC is extremely durable, relatively inexpensive, subject to minimal technique sensitivity during placement, and offers the advantage of full coronal coverage. SSC are often used to restore primary and permanent teeth in children and adolescents where intracoronal restorations would otherwise fail. This article brings the update of this definitive restoration.

  12. Circular Polarization in Pulsar Integrated Profiles: Updates

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    We update the systematic studies of circular polarization in integrated pulse profiles by Han et al. Data of circular polarization profiles are compiled. Sense reversals can occur in core or cone components, or near the intersection between components. The correlation between the sense of circular polarization and the sense of position angle variation for conal-double pulsars is confirmed with a much large database. Circular polarization of some pulsars has clear changes with frequency.Circular polarization of millisecond pulsars is marginally different from that of normal pulsars.

  13. Novel therapies in genitourinary cancer: an update

    Directory of Open Access Journals (Sweden)

    Wu Shenhong

    2008-08-01

    Full Text Available Abstract In recent years, new treatment for renal cell carcinoma (RCC has been a spotlight in the field of cancer therapeutics. With several emerging agents branded as 'targeted therapy' now available, both medical oncologists and urologists are progressively more hopeful for better outcomes. The new remedies may provide patients with improved survival and at the same time less toxicity when compared to traditional cytotoxic agents. This article will center on current and emerging treatment strategies for advanced RCC and other GU malignancies with updates from 2008 annual ASCO meeting.

  14. Genesis Solar Wind Samples: Update of Availability

    Science.gov (United States)

    Gonzalez, C. P.; Allums, K. K.; Allton, J. H.

    2015-01-01

    The Genesis mission collected solar wind atoms for 28 months with a variety of collectors. The array wafer collector availability is displayed in the online catalog. The purpose of this report is to update the community on availability of array wafer samples and to preview other collectors which are in the process of being added to the online catalog. A total of fifteen pure materials were selected based on engineering and science requirements. Most of the materials were semiconductor wafers which were mounted on the arrays.

  15. Xanthones of Lichen Source: A 2016 Update.

    Science.gov (United States)

    Le Pogam, Pierre; Boustie, Joël

    2016-03-02

    An update of xanthones encountered in lichens is proposed as more than 20 new xanthones have been described since the publication of the compendium of lichen metabolites by Huneck and Yoshimura in 1996. The last decades witnessed major advances regarding the elucidation of biosynthetic schemes leading to these fascinating compounds, accounting for the unique substitution patterns of a very vast majority of lichen xanthones. Besides a comprehensive analysis of the structures of xanthones described in lichens, their bioactivities and the emerging analytical strategies used to pinpoint them within lichens are presented here together with physico-chemical properties (including NMR data) as reported since 1996.

  16. Treatment of Warts in Children: An Update.

    Science.gov (United States)

    Gerlero, P; Hernández-Martín, Á

    2016-09-01

    Warts are among the most common skin infections in children. Although numerous treatment options are available, none are completely effective in a single session. Treatment is particularly complicated in children, not only because certain treatments are poorly tolerated, but also because parents frequently have unrealistic expectations. In this article, we offer an update on the treatments available for warts, focusing specifically on pediatric patients. We do not discuss treatments for oral and anogenital warts. Copyright © 2016 AEDV. Publicado por Elsevier España, S.L.U. All rights reserved.

  17. Bosonization and Cluster Updating of Lattice Fermions

    CERN Document Server

    Wiese, U J

    1993-01-01

    A lattice fermion model is formulated in Fock space using the Jordan-Wigner representation for the fermion creation and annihilation operators. The resulting path integral is a sum over configurations of lattice site occupation numbers $n(x,t) = 0,1$ which may be viewed as bosonic Ising-like variables. However, as a remnant of Fermi statistics a nonlocal sign factor arises for each configuration. When this factor is included in measured observables the bosonic occupation numbers interact locally, and one can use efficient cluster algorithms to update the bosonized variables.

  18. Computer virus information update CIAC-2301

    Energy Technology Data Exchange (ETDEWEB)

    Orvis, W.J.

    1994-01-15

    While CIAC periodically issues bulletins about specific computer viruses, these bulletins do not cover all the computer viruses that affect desktop computers. The purpose of this document is to identify most of the known viruses for the MS-DOS and Macintosh platforms and give an overview of the effects of each virus. The authors also include information on some windows, Atari, and Amiga viruses. This document is revised periodically as new virus information becomes available. This document replaces all earlier versions of the CIAC Computer virus Information Update. The date on the front cover indicates date on which the information in this document was extracted from CIAC`s Virus database.

  19. Estrogen and thyroid diseases: an update.

    Science.gov (United States)

    Lu, Yihan; Li, Jian; Li, Jing

    2016-08-01

    Most of thyroid diseases show female predilection, especially autoimmune thyroid diseases (AITD) and thyroid cancer (TC). We give an updated brief review here, focusing on estrogen, estrogen receptor (ER) and AITD as well as TC. Estrogen can regulate the functions of nearly all immunocyte subsets, which may contribute to the development of AITD. However, there was still lack of direct studies on ER subtype-specific effects on AITD. Recently, the local expression of ER subtypes and their individual mediated actions in the pathogenesis of TC have already received much attention. ERα activation seems to exacerbate the development of TC, while wild-type ERβ (ERβ1) plays a protective role against TC.

  20. Standard Review Plan Update and Development Program

    Energy Technology Data Exchange (ETDEWEB)

    1992-05-01

    This implementing procedures document (IPD) was prepared for use in implementing tasks under the standard review plan update and development program (SRP-UDP). The IPD provides comprehensive guidance and detailed procedures for SRP-UDP tasks. The IPD is mandatory for contractors performing work for the SRP-UDP. It is guidance for the staff. At the completion of the SRP-UDP, the IPD will be revised (to remove the UDP aspects) and will replace NRR Office Letter No. 800 as long-term maintenance procedures.

  1. Citicoline: pharmacological and clinical review, 2016 update.

    Science.gov (United States)

    Secades, J J

    2016-12-23

    This review is based on the previous one published in 2010 -Secades JJ. Citicoline: pharmacological and clinical review, 2010 update. Rev Neurol 2011; 52 (Suppl 2): S1-62-, incorporating 183 new references, having all the information available to facilitate the access to the information in one document. This review is focused on the main indications of the drug, as acute stroke and its sequelae, including the cognitive impairment, and traumatic brain injury and its sequelae. There are retrieved the most important experimental and clinical data in both indications.

  2. Endodontics and forensic personal identification: An update

    Directory of Open Access Journals (Sweden)

    Hany Mohamed Aly Ahmed

    2017-01-01

    Full Text Available Dental identification of a deceased individual is a core task in forensic odontology. The accurate recording of clinical dental procedures has become more important over time because of the increasing trend of lawsuits worldwide. Previous reports have discussed the practical usefulness of endodontic evidence for human identification. Advances in endodontic imaging, root and root canal anatomy, and biomaterials have been consistently emerging in endodontic research and practice. This article provides an update on the interrelationship between endodontics and forensic personal identification.

  3. Updated U.S. Geothermal Supply Characterization

    Energy Technology Data Exchange (ETDEWEB)

    Petty, S.; Porro, G.

    2007-03-01

    This paper documents the approach taken to characterize and represent an updated assessment of U.S. geothermal supply for use in forecasting the penetration of geothermal electrical generation in the National Energy Modeling System (NEMS). This work is motivated by several factors: The supply characterization used as the basis of several recent U.S. Department of Energy (DOE) forecasts of geothermal capacity is outdated; additional geothermal resource assessments have been published; and a new costing tool that incorporates current technology, engineering practices, and associated costs has been released.

  4. Updates on esophageal and gastric cancers

    Institute of Scientific and Technical Information of China (English)

    Amy Gallo; Charles Cha

    2006-01-01

    Esophageal and gastric cancers are both common and deadly. Patients present most often after disease progression and survival is therefore poor. Due to demographic variability and recent changes in disease incidence, much emphasis has been placed on studying risk factors for both esophageal and gastric cancers.However, with increasing understanding of these diseases, low survival rates persist and continued intensive studies are necessary to optimize treatment plans. This review article discusses updates in the evolving epidemiology, clinical presentation, risk factors,and diagnostic and treatment modalities of esophageal and gastric cancers.

  5. JPSS CGS Tools For Rapid Algorithm Updates

    Science.gov (United States)

    Smith, D. C.; Grant, K. D.

    2011-12-01

    The National Oceanic and Atmospheric Administration (NOAA) and National Aeronautics and Space Administration (NASA) are jointly acquiring the next-generation civilian weather and environmental satellite system: the Joint Polar Satellite System (JPSS). JPSS will contribute the afternoon orbit component and ground processing system of the restructured National Polar-orbiting Operational Environmental Satellite System (NPOESS). As such, JPSS replaces the current Polar-orbiting Operational Environmental Satellites (POES) managed by NOAA and the ground processing component of both POES and the Defense Meteorological Satellite Program (DMSP) replacement known as the Defense Weather Satellite System (DWSS), managed by the Department of Defense (DoD). The JPSS satellites will carry a suite of sensors designed to collect meteorological, oceanographic, climatological, and solar-geophysical observations of the earth, atmosphere, and space. The ground processing system for JPSS is known as the JPSS Common Ground System (JPSS CGS), and consists of a Command, Control, and Communications Segment (C3S) and the Interface Data Processing Segment (IDPS). Both are developed by Raytheon Intelligence and Information Systems (IIS). The Interface Data Processing Segment will process NPOESS Preparatory Project, Joint Polar Satellite System and Defense Weather Satellite System satellite data to provide environmental data products to NOAA and DoD processing centers operated by the United States government. Under NPOESS, Northrop Grumman Aerospace Systems Algorithms and Data Products (A&DP) organization was responsible for the algorithms that produce the EDRs, including their quality aspects. For JPSS, that responsibility has transferred to NOAA's Center for Satellite Applications & Research (STAR). As the Calibration and Validation (Cal/Val) activities move forward following both the NPP launch and subsequent JPSS and DWSS launches, rapid algorithm updates may be required. Raytheon and

  6. Update on fungemia in oncology and hematology.

    Science.gov (United States)

    Carreras, Enric; Vázquez, Lourdes; Rodríguez Tudela, José Luis; Pahisa, Albert; Azanza, José Ramón; Rovira, Montserrat; de la Cámara, Rafael

    2011-03-01

    The present article is an update of the literature on fungemia in onco-hematologic patients. A multidisciplinary group of Spanish physicians with an interest in this field selected the most important papers published lately. Papers from the fields of epidemiology, risk factors, pathogenesis, diagnosis, outcome, prevention and treatment are discussed. Important aspects of these studies include the assessment of different strategies in the management of fever in neutropenic patients. Moreover, early identification of patients at risk of fungal infections, as well as identification of patients at risk for fluconazole-resistant strains are topics of increasing interest.

  7. Gearbox Reliability Collaborative Update: A Brief (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Sheng, S.; Keller, J.; McDade, M.

    2012-01-01

    This presentation is an update on the Gearbox Reliability Collaborative (GRC) for the AWEA Wind Project Operations, Maintenance & Reliability Seminar. GRC accomplishments are: (1) Failure database software deployed - partners see business value for themselves and customers; (2) Designed, built, instrumented, and tested two gearboxes - (a) Generated unprecedented public domain test data from both field testing and dynamometer testing, (b) Different responses from 'identical' gearboxes, (c) Demonstrated importance of non-torque loading and modeling approach; and (3) Active collaborative, with wide industry support, leveraging DOE funding - Modeling round robin and Condition Monitoring round robin.

  8. Xanthones of Lichen Source: A 2016 Update

    Directory of Open Access Journals (Sweden)

    Pierre Le Pogam

    2016-03-01

    Full Text Available An update of xanthones encountered in lichens is proposed as more than 20 new xanthones have been described since the publication of the compendium of lichen metabolites by Huneck and Yoshimura in 1996. The last decades witnessed major advances regarding the elucidation of biosynthetic schemes leading to these fascinating compounds, accounting for the unique substitution patterns of a very vast majority of lichen xanthones. Besides a comprehensive analysis of the structures of xanthones described in lichens, their bioactivities and the emerging analytical strategies used to pinpoint them within lichens are presented here together with physico-chemical properties (including NMR data as reported since 1996.

  9. Update on key topics in adolescent gynecology.

    Science.gov (United States)

    Fisher, Martin; Lara-Torre, Eduardo

    2013-02-01

    AM:STARs, the Adolescent Medicine State of the Art Reviews series published by the American Academy of Pediatrics, devoted its April 2012 issue to the topic of Adolescent Gynecology. Developed in conjunction with the North American Society for Pediatric and Adolescent Gynecology (NASPAG), the issue consists of twelve articles, written mostly by members of NASPAG. As editors of the issue, we present in this review for the Journal of Pediatric and Adolescent Gynecology (JPAG) a synopsis of the most salient concepts presented in those 12 articles. This review of reviews is intended to be an update on the "state of the art" in adolescent gynecology.

  10. AZIDE-ALKYNE CLICK POLYMERIZATION: AN UPDATE

    Institute of Scientific and Technical Information of China (English)

    Hong-kun Li; Jing-zhi Sun; An-jun Qin; Ben Zhong Tang

    2012-01-01

    The great achievements of click chemistry have encouraged polymer scientists to use this reaction in their field.This review assembles an update of the advances of using azide-alkyne click polymerization to prepare functional polytriazoles (PTAs) with linear and hyperbranched structures.The Cu(Ⅰ)-mediated click polymerization furnishes 1,4-regioregular PTAs,whereas,the metal-free click polymerization of propiolates and azides produces PTAs with 1,4-regioisomer contents up to 90%.The PTAs display advanced functions,such as aggregation-induced emission,thermal stability,biocompatibility and optical nonlinearity.

  11. An update on inflammatory breast cancer

    Directory of Open Access Journals (Sweden)

    P. Thapaliya

    2011-12-01

    Full Text Available Inflammatory breast cancer is one of the most aggressive forms of breast cancer. Once considered to be a uniformly fatal disease, treatment of this entity has evolved significantly over the last two decades. In this article, we review the epidemiology, pathology, biologic underpinnings, radiologic advances, and treatment modalities for inflammatory breast cancer. Updates in surgical therapy, medical oncologic therapy and radiation therapy are reviewed. Emphasis is on cutting edge information regarding inflammatory breast cancer. The management of inflammatory breast cancer is best served by a multidisciplinary team. Continued research into molecular pathways and potential targets is imperative. Future clinical trials should include evaluation of conventional therapy with targeted therapies.

  12. Sudden Sensorineural Hearing Loss: Primary Care Update.

    Science.gov (United States)

    Leung, Marcia A; Flaherty, Anna; Zhang, Julia A; Hara, Jared; Barber, Wayne; Burgess, Lawrence

    2016-06-01

    The primary care physician's role in recognizing sudden sensorineural hearing (SSNHL) loss and delivering initial treatment is critical in the management of the syndrome. This role involves recognizing its clinical symptoms, distinguishing it from conductive hearing loss with the Weber tuning fork or the Rauch hum test, and urgent administration of high dose oral corticosteroids. Diagnosis and treatment should not be delayed for audiometric testing or referral to otolaryngology. This paper provides an update on the initial evaluation and treatment of this syndrome based on the literature and clinical guideline recommendations.

  13. [Vitamin D. A geriatric updated perspective].

    Science.gov (United States)

    Ribera Casado, José Manuel

    2012-01-01

    The aim of this review is to offer an updated survey about the relationship between old age, vitamin D and different clinical conditions. Two third of people over 65 years has insufficient serum levels of vitamin D (macular degeneration or periodontitis. Also with muscle strength, mobility and physical performance. Vitamin D supplementation has beneficial clinical effects, with a significant reduction of risks, specially in subjects living in nursing-homes and in those treated with corticoids or antireabsortive drugs. These effects are doses dependent. Risk of intoxication is minimal, even with high doses of vitamin.

  14. Hormonal treatment of acne vulgaris: an update

    Science.gov (United States)

    Elsaie, Mohamed L

    2016-01-01

    Acne vulgaris is a common skin condition associated with multiple factors. Although mostly presenting alone, it can likewise present with features of hyperandrogenism and hormonal discrepancies. Of note, hormonal therapies are indicated in severe, resistant-to-treatment cases and in those with monthly flare-ups and when standard therapeutic options are inappropriate. This article serves as an update to hormonal pathogenesis of acne, discusses the basics of endocrinal evaluation for patients with suspected hormonal acne, and provides an overview of the current hormonal treatment options in women. PMID:27621661

  15. AN UPDATE ON PHARMACOLOGICAL PROPERTIES OF RESVERATROL

    Directory of Open Access Journals (Sweden)

    Agnihotri Gaytri

    2012-08-01

    Full Text Available Resveratrol, red wine mainly present in grapes acts as a natural phytoalexin and phytoestrogen. It has potent antioxidant activity and then has been implicated in the management of various cardiovascular and inflammatory disorders. Further, it has been also documented to be successful in the reduction of ischemic reperfusion [I/R] injury. It has been found to possess immunosuppressive property and is used as anti-cancer and ameliorates the endothelial functions. Still, no evidence is availible that suggest signaling pathway mechanism associated with resveratrol. Thus, the present review deals with the update of various signaling pathway and therapeutic implications of resveratrol in the management of various disorders.

  16. An update on the vaccinia virus genome.

    Science.gov (United States)

    Johnson, G P; Goebel, S J; Paoletti, E

    1993-10-01

    This communication is intended as a single source update of the initial report (Goebel et al., 1990a,b) which described the complete DNA sequence of the vaccinia virus genome. We have integrated published information as well as unpublished data. Our understanding of the complexities of the genetic functional organization of poxviruses is increasing at a remarkable rate. While some previously unknown identities have since been elucidated, the fact that the majority of vaccinia-encoded gene products still lack assigned functions lends excitement to the immediate future of poxvirus research.

  17. Citicoline: pharmacological and clinical review, 2010 update.

    Science.gov (United States)

    Secades, J J

    2011-03-14

    This review is based on the previous one published in 2006 -Secades JJ, Lorenzo JL. Citicoline: pharmacological and clinical review, 2006 update. Methods Find Exp Clin Pharmacol 2006; 28 (Suppl B): S1-56-, incorporating the new references until now, having all the information available to facilitate the access to the informacion in one document. This review is focused on the main indications of the drug, as acute stroke and its sequelae, including the cognitive impairment, and traumatic brain injury and its sequelae. There are retrieved the most important experimental and clinical data in both indications.

  18. Evolution of cooperative behavior in simulation agents

    Energy Technology Data Exchange (ETDEWEB)

    Stroud, P.D.

    1998-04-01

    A simulated automobile factory paint shop is used as a testbed for exploring the emulation of human decision making behavior. A discrete events simulation of the paint shop as a collection of interacting Java actors is described. An evolutionary cognitive architecture is under development for building software actors to emulate humans in simulations of human dominated complex systems. In this paper, the cognitive architecture is extended by implementing a persistent population of trial behaviors with an incremental fitness valuation update strategy, and by allowing a group of cognitive actors to share information. A proof of principle demonstration is presented.

  19. Nonsynchronous updating in the multiverse of cellular automata

    Science.gov (United States)

    Reia, Sandro M.; Kinouchi, Osame

    2015-04-01

    In this paper we study updating effects on cellular automata rule space. We consider a subset of 6144 order-3 automata from the space of 262144 bidimensional outer-totalistic rules. We compare synchronous to asynchronous and sequential updatings. Focusing on two automata, we discuss how update changes destroy typical structures of these rules. Besides, we show that the first-order phase transition in the multiverse of synchronous cellular automata, revealed with the use of a recently introduced control parameter, seems to be robust not only to changes in update schema but also to different initial densities.

  20. Research on dynamic update transaction for Java classes

    Institute of Scientific and Technical Information of China (English)

    ZHANG Shi; HUANG Linpeng

    2007-01-01

    Dynamic software updating is critical for many systems that must provide continuous service.In addition,the Java language is gaining increasing popularity in developing distributed systems.Most previous works on updating are concerned with safely updating one class every time.It has many limitations on updating classes,such as not allowing deleting methods invoked in other classes.In this paper,the update transaction is purposed to dynamically update the class set,and some of its properties are discussed,such as atomicity,consistency,isolation,and durability (ACID).Then the property of type-safety is proven formally.In order to update without changing the Java Virtual Ma chine (JVM) and the Java programming language,this paper proposes a new implementation method.The method makes use of the Java class loading mechanism and reflection mechanism.We also present how to design an updatable Java program and a Java updating program.At the end of the paper,an experiment is made for analysis.

  1. The Clinically Inapparent Adrenal Mass: Update in Diagnosis and Management

    National Research Council Canada - National Science Library

    Mansmann, Georg; Lau, Joseph; Balk, Ethan; Rothberg, Michael; Miyachi, Yukitaka; Bornstein, Stefan R

    2004-01-01

    .... Based on 699 articles that were retrieved for further examination, we provide a comprehensive update of the diagnostic and therapeutic approaches focusing on endocrine and radiological features...

  2. Updating verbal and visuospatial working memory: Are the processes parallel?

    Institute of Scientific and Technical Information of China (English)

    YUE ZhenZhu; ZHANG Ming; ZHOU XiaoLin

    2008-01-01

    The current study compared the processes of updating verbal and visuospatial working memory (WM) and examined the roles of central executive and slave systems in working memory updating tasks, by changing the number of items updated simultaneously to manipulate the load on central executive. Ex-periment 1 used the verbal WM updating task, and the results validated the efficiency of the paradigm to manipulate the load on central executive. Experiment 2 employed the verbal WM updating task, with the articulatory suppression task to interfere with the phonological loop. The results supported the study by Morris and Jones, revealing that the central executive system played an important role in the updating component of verbal WM, while the phonological loop was responsible for the serial recall component. Experiment 3 employed the visuospatial WM updating task, with the spatial tapping task to interfere with the visuospatial sketchpad. The results suggested that the visuospatial sketchpad and the central execu-tive together dealt with the updating component, while the visuospatial sketchpad was responsible for the serial recall component by itself. These results are consistent with the findings that visuospatial sketch-pad has close links with central executive, while the phonological loop is separated from the central ex-ecutive. It suggests that updating visuospatial and verbal WM are not two parallel processes.

  3. Update History of This Database - PLACE | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available [ Credits ] BLAST Search Image Search Home About Archive Update History Contact us PLACE Up...date History of This Database Date Update contents 2014/10/20 The URLs of the database maintenance s... This Database Database Description Download License Update History of This Database Site Policy | Contact Us Update History of This Database - PLACE | LSDB Archive ...

  4. Update History of This Database - Taxonomy Icon | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available [ Credits ] BLAST Search Image Search Home About Archive Update History Contact us Taxonomy Icon Up...date History of This Database Date Update contents 2013/06/19 Taxonomy Icon English archive ...by Artio About This Database Database Description Download License Update History... of This Database Site Policy | Contact Us Update History of This Database - Taxonomy Icon | LSDB Archive ...

  5. Update History of This Database - RPD | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available switchLanguage; BLAST Search Image Search Home About Archive Update History Data ...List Contact us RPD Update History of This Database Date Update contents 2016/02/02 Rice Proteome Database E...pened. About This Database Database Description Download License Update History of This Database Site Policy | Contact Us Update History of This Database - RPD | LSDB Archive ...

  6. Update History of This Database - MicrobeDB.jp | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available switchLanguage; BLAST Search Image Search Home About Archive Update History Data ...List Contact us MicrobeDB.jp Update History of This Database Date Update contents 2017/06/29 Archive V2 is r...ion Download License Update History of This Database Site Policy | Contact Us Update History of This Database - MicrobeDB.jp | LSDB Archive ...

  7. Update History of This Database - SSBD | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available switchLanguage; BLAST Search Image Search Home About Archive Update History Data ...List Contact us SSBD Update History of This Database Date Update contents 2016/07/25 SSBD English archive si...tion Download License Update History of This Database Site Policy | Contact Us Update History of This Database - SSBD | LSDB Archive ...

  8. Update History of This Database - eSOL | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available switchLanguage; BLAST Search Image Search Home About Archive Update History Data ...List Contact us eSOL Update History of This Database Date Update contents 2016/05/30 eSOL English archive si...ription Download License Update History of This Database Site Policy | Contact Us Update History of This Database - eSOL | LSDB Archive ...

  9. Update History of This Database - dbQSNP | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available switchLanguage; BLAST Search Image Search Home About Archive Update History Data ...List Contact us dbQSNP Update History of This Database Date Update contents 2017/02/16 dbQSNP English archiv...e Description Download License Update History of This Database Site Policy | Contact Us Update History of This Database - dbQSNP | LSDB Archive ...

  10. Update History of This Database - GRIPDB | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available switchLanguage; BLAST Search Image Search Home About Archive Update History Data ...List Contact us GRIPDB Update History of This Database Date Update contents 2017/07/19 GRIPDB English archiv...base Description Download License Update History of This Database Site Policy | Contact Us Update History of This Database - GRIPDB | LSDB Archive ...

  11. Update History of This Database - JSNP | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available switchLanguage; BLAST Search Image Search Home About Archive Update History Data ...List Contact us JSNP Update History of This Database Date Update contents 2016/12/06 Description of the orig...ption Download License Update History of This Database Site Policy | Contact Us Update History of This Database - JSNP | LSDB Archive ...

  12. Update History of This Database - fRNAdb | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available switchLanguage; BLAST Search Image Search Home About Archive Update History Data ...List Contact us fRNAdb Update History of This Database Date Update contents 2016/03/29 fRNAdb English archiv...on Download License Update History of This Database Site Policy | Contact Us Update History of This Database - fRNAdb | LSDB Archive ...

  13. Update History of This Database - PSCDB | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available switchLanguage; BLAST Search Image Search Home About Archive Update History Data ...List Contact us PSCDB Update History of This Database Date Update contents 2016/11/30 PSCDB English archive ...abase Database Description Download License Update History of This Database Site Policy | Contact Us Update History of This Database - PSCDB | LSDB Archive ...

  14. Update History of This Database - TMFunction | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available switchLanguage; BLAST Search Image Search Home About Archive Update History Data ...List Contact us TMFunction Update History of This Database Date Update contents 2017/01/23 TMFunction Englis... Database Database Description Download License Update History of This Database Site Policy | Contact Us Update History of This Database - TMFunction | LSDB Archive ...

  15. Update History of This Database - DB-SPIRE | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available switchLanguage; BLAST Search Image Search Home About Archive Update History Data ...List Contact us DB-SPIRE Update History of This Database Date Update contents 2017/02/16 DB-SPIRE English ar...ase Description Download License Update History of This Database Site Policy | Contact Us Update History of This Database - DB-SPIRE | LSDB Archive ...

  16. Update History of This Database - FANTOM5 | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available switchLanguage; BLAST Search Image Search Home About Archive Update History Data ...List Contact us FANTOM5 Update History of This Database Date Update contents 2017/03/14 FANTOM5 English arch...escription Download License Update History of This Database Site Policy | Contact Us Update History of This Database - FANTOM5 | LSDB Archive ...

  17. Update History of This Database - Yeast Interacting Proteins Database | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available [ Credits ] BLAST Search Image Search Home About Archive Update History Contact us ...Yeast Interacting Proteins Database Update History of This Database Date Update contents 2010/03/29 Yeast In...t This Database Database Description Download License Update History of This Database Site Policy | Contact Us Update History

  18. CMS Full Simulation for Run-2

    CERN Document Server

    Hildreth, M; Lange, D J; Kortelainen, M J

    2015-01-01

    During LHC shutdown between run-1 and run-2 intensive developments were carried out to improve performance of CMS simulation. For physics improvements migration from Geant4 9.4p03 to Geant4 10.0p02 has been performed. CPU performance has been improved by introduction of the Russian roulette method inside CMS calorimeters, optimization of CMS simulation sub-libraries, and usage of statics build of the simulation executable. As a result of these efforts, CMS simulation has been speeded up by about factor two. In this work we provide description of updates for different software components of CMS simulation. Development of a multi-threaded (MT) simulation approach for CMS will be also discuss.

  19. Update on pathology of ocular parasitic disease

    Science.gov (United States)

    Das, Dipankar; Ramachandra, Varsha; Islam, Saidul; Bhattacharjee, Harsha; Biswas, Jyotirmay; Koul, Akanksha; Deka, Panna; Deka, Apurba

    2016-01-01

    Parasites are a group of eukaryotic organisms that may be free-living or form a symbiotic or parasitic relationship with the hosts. Consisting of over 800,000 recognized species, parasites may be unicellular (Protozoa) or multicellular (helminths and arthropods). The association of parasites with human population started long before the emergence of civilization. Parasitic zoonotic diseases are prevalent worldwide including India. Appropriate epidemiological data are lacking on existing zoonotic parasitic diseases, and newer diseases are emerging in our scenario. Systemic diseases such as cysticercosis, paragonimiasis, hydatidosis, and toxoplasmosis are fairly common. Acquired Toxoplasma infections are rising in immune-deficient individuals. Amongst the ocular parasitic diseases, various protozoas such as Cystoidea, trematodes, tissue flagellates, sporozoas etc. affect humans in general and eyes in particular, in different parts of the world. These zoonoses seem to be a real health related problem globally. Recent intensification of research throughout the world has led to specialization in biological fields, creating a conducive situation for researchers interested in this subject. The basics of parasitology lie in morphology, pathology, and with recent updates in molecular parasitology, the scope has extended further. The current review is to address the recent update in ophthalmic parasites with special reference to pathology and give a glimpse of further research in this field. PMID:27958200

  20. Update on pathology of ocular parasitic disease

    Directory of Open Access Journals (Sweden)

    Dipankar Das

    2016-01-01

    Full Text Available Parasites are a group of eukaryotic organisms that may be free-living or form a symbiotic or parasitic relationship with the hosts. Consisting of over 800,000 recognized species, parasites may be unicellular (Protozoa or multicellular (helminths and arthropods. The association of parasites with human population started long before the emergence of civilization. Parasitic zoonotic diseases are prevalent worldwide including India. Appropriate epidemiological data are lacking on existing zoonotic parasitic diseases, and newer diseases are emerging in our scenario. Systemic diseases such as cysticercosis, paragonimiasis, hydatidosis, and toxoplasmosis are fairly common. Acquired Toxoplasma infections are rising in immune-deficient individuals. Amongst the ocular parasitic diseases, various protozoas such as Cystoidea, trematodes, tissue flagellates, sporozoas etc. affect humans in general and eyes in particular, in different parts of the world. These zoonoses seem to be a real health related problem globally. Recent intensification of research throughout the world has led to specialization in biological fields, creating a conducive situation for researchers interested in this subject. The basics of parasitology lie in morphology, pathology, and with recent updates in molecular parasitology, the scope has extended further. The current review is to address the recent update in ophthalmic parasites with special reference to pathology and give a glimpse of further research in this field.

  1. Susceptibility to chronic inflammation: an update.

    Science.gov (United States)

    Nasef, Noha Ahmed; Mehta, Sunali; Ferguson, Lynnette R

    2017-03-01

    Chronic inflammation is defined by the persistence of inflammatory processes beyond their physiological function, resulting in tissue destruction. Chronic inflammation is implicated in the progression of many chronic diseases and plays a central role in chronic inflammatory and autoimmune disease. As such, this review aims to collate some of the latest research in relation to genetic and environmental susceptibilities to chronic inflammation. In the genetic section, we discuss some of the updates in cytokine research and current treatments that are being developed. We also discuss newly identified canonical and non-canonical genes associated with chronic inflammation. In the environmental section, we highlight some of the latest updates and evidence in relation to the role that infection, diet and stress play in promoting inflammation. The aim of this review is to provide an overview of the latest research to build on our current understanding of chronic inflammation. It highlights the complexity associated with chronic inflammation, as well as provides insights into potential new targets for therapies that could be used to treat chronic inflammation and consequently prevent disease progression.

  2. Endocrine Dysregulation in Anorexia Nervosa Update

    Science.gov (United States)

    2011-01-01

    Context: Anorexia nervosa is a primary psychiatric disorder with serious endocrine consequences, including dysregulation of the gonadal, adrenal, and GH axes, and severe bone loss. This Update reviews recent advances in the understanding of the endocrine dysregulation observed in this state of chronic starvation, as well as the mechanisms underlying the disease itself. Evidence Acquisition: Findings of this update are based on a PubMed search and the author's knowledge of this field. Evidence Synthesis: Recent studies have provided insights into the mechanisms underlying endocrine dysregulation in states of chronic starvation as well as the etiology of anorexia nervosa itself. This includes a more complex understanding of the pathophysiologic bases of hypogonadism, hypercortisolemia, GH resistance, appetite regulation, and bone loss. Nevertheless, the etiology of the disease remains largely unknown, and effective therapies for the endocrine complications and for the disease itself are lacking. Conclusions: Despite significant progress in the field, further research is needed to elucidate the mechanisms underlying the development of anorexia nervosa and its endocrine complications. Such investigations promise to yield important advances in the therapeutic approach to this disease as well as to the understanding of the regulation of endocrine function, skeletal biology, and appetite regulation. PMID:21976742

  3. Prevalence of fibromyalgia: literature review update.

    Science.gov (United States)

    Marques, Amelia Pasqual; Santo, Adriana de Sousa do Espírito; Berssaneti, Ana Assumpção; Matsutani, Luciana Akemi; Yuan, Susan Lee King

    2016-12-18

    The present study aimed to update the literature review on the prevalence of fibromyalgia (FM) published in 2006. A bibliographical survey was carried out from 2005 to 2014 in the MEDLINE, Web of Science, Embase, LILACS and SciELO databases and 3274 records were identified. Five researchers selected the studies, following the inclusion criteria: studies that obtained the prevalence of FM. FM studies in associated diseases were excluded. When screening by title and abstract, 2073 irrelevant articles were excluded. The full texts of 210 articles were evaluated for eligibility and this review included 39 studies, described in 41 articles. The selected studies were grouped into four categories: a) prevalence of FM in the general population; B) prevalence of FM in women; C) prevalence of FM in rural and urban areas; D) prevalence of FM in special populations. The literature shows values of FM prevalence in the general population between 0.2 and 6.6%, in women between 2.4 and 6.8%, in urban areas between 0.7 and 11.4%, in rural areas between 0.1 and 5.2%, and in special populations values between 0.6 and 15%. This literature review update shows a significant increase in FM prevalence studies in the world. The new 2010 American College of Rheumatology criteria have not been widely used yet and the COPCORD (Community-oriented program for control of Rheumatic Diseases) methodology has increased the quality of studies on the prevalence of rheumatic diseases in general.

  4. The UCSC Cancer Genomics Browser: update 2013.

    Science.gov (United States)

    Goldman, Mary; Craft, Brian; Swatloski, Teresa; Ellrott, Kyle; Cline, Melissa; Diekhans, Mark; Ma, Singer; Wilks, Chris; Stuart, Josh; Haussler, David; Zhu, Jingchun

    2013-01-01

    The UCSC Cancer Genomics Browser (https://genome-cancer.ucsc.edu/) is a set of web-based tools to display, investigate and analyse cancer genomics data and its associated clinical information. The browser provides whole-genome to base-pair level views of several different types of genomics data, including some next-generation sequencing platforms. The ability to view multiple datasets together allows users to make comparisons across different data and cancer types. Biological pathways, collections of genes, genomic or clinical information can be used to sort, aggregate and zoom into a group of samples. We currently display an expanding set of data from various sources, including 201 datasets from 22 TCGA (The Cancer Genome Atlas) cancers as well as data from Cancer Cell Line Encyclopedia and Stand Up To Cancer. New features include a completely redesigned user interface with an interactive tutorial and updated documentation. We have also added data downloads, additional clinical heatmap features, and an updated Tumor Image Browser based on Google Maps. New security features allow authenticated users access to private datasets hosted by several different consortia through the public website.

  5. A taxonomy update for the family Polyomaviridae.

    Science.gov (United States)

    Calvignac-Spencer, Sébastien; Feltkamp, Mariet C W; Daugherty, Matthew D; Moens, Ugo; Ramqvist, Torbjörn; Johne, Reimar; Ehlers, Bernhard

    2016-06-01

    Many distinct polyomaviruses infecting a variety of vertebrate hosts have recently been discovered, and their complete genome sequence could often be determined. To accommodate this fast-growing diversity, the International Committee on Taxonomy of Viruses (ICTV) Polyomaviridae Study Group designed a host- and sequence-based rationale for an updated taxonomy of the family Polyomaviridae. Applying this resulted in numerous recommendations of taxonomical revisions, which were accepted by the Executive Committee of the ICTV in December 2015. New criteria for definition and creation of polyomavirus species were established that were based on the observed distance between large T antigen coding sequences. Four genera (Alpha-, Beta, Gamma- and Deltapolyomavirus) were delineated that together include 73 species. Species naming was made as systematic as possible - most species names now consist of the binomial name of the host species followed by polyomavirus and a number reflecting the order of discovery. It is hoped that this important update of the family taxonomy will serve as a stable basis for future taxonomical developments.

  6. Porifera of Greece: an updated checklist.

    Science.gov (United States)

    Voultsiadou, Eleni; Gerovasileiou, Vasilis; Bailly, Nicolas

    2016-01-01

    The checklist of Porifera of Greece was created in the framework of the Greek Taxon Information System (GTIS), an initiative of the LifeWatchGreece Research Infrastructure (ESFRI) that has resumed efforts to compile a complete checklist of species recorded from Greece. An updated checklist of Porifera was created on the basis of a list of the Aegean Demospongiae and Homoscleromorpha published one decade ago. All records of species known to occur in Greek waters were taxonomically validated and cross-checked for possible inaccuracies and omissions. Then, all recent publications were reviewed and the species recorded from 2006 to date were added to the list. The updated checklist of Porifera of Greece comprises 215 species, classified to 111 genera, 65 families, 24 orders, and 4 classes. In total, 34 new additions were made to the previous species list (8 Calcarea, 17 Demospongiae, 1 Hexactinellida, and 6 Homoscleromorpha) with Calcarea being listed for the first time from the area. The demosponge orders Poecilosclerida, Dictyoceratida, Tetractinellida, Haplosclerida, and Suberitida have the highest number of species covering 62% of the known Greek sponge species richness. It is worth mentioning that 8 species have been first described from Greek waters, 7 of which are considered endemic to this area. Our bibliographic overview also revealed knowledge gaps with regard to specific habitats typically rich in sponge diversity, and marine sectors of Greece.

  7. Crayfish distribution updating in central Italy

    Directory of Open Access Journals (Sweden)

    M. Scalici

    2009-01-01

    Full Text Available Introductions of non-indigenous crayfish have received great attention from biologists and policy makers during the last decade. Purposes of this study are to update the knowledge about the crayfish distribution in Latium (central Italy, and to show how interactions between indigenous and non-indigenous species can affect their distribution. The main findings of this study were (1 the great decrease of the Austropotamobius pallipes populations and (2 the alarming spread of the four non-indigenous species red swamp crayfish Procambarus clarkii (the main widespread crayfish, spiny-cheek crayfish Orconectes limosus, narrow-clawed crayfish Astacus leptodactylus, and yabby Cherax destructor. We never observed indigenous and non-indigenous crayfish living in syntopy, although we noted that white-clawed crayfish had become extinct at sites where non-indigenous crayfish species exist now. Other type of problems (i.e. illegal harvesting and over-abstraction of water for human use can also reduce the distribution and abundance of the indigenous crayfish stocks. The distribution of Italian crayfish populations has not been studied sufficiently and more studies are required nationwide to assess the conservation status of A. pallipes and the occurrence of non-indigenous species. A national database of crayfish records ought to be constructed and regularly updated.

  8. Porifera of Greece: an updated checklist

    Science.gov (United States)

    Bailly, Nicolas

    2016-01-01

    Abstract Background The checklist of Porifera of Greece was created in the framework of the Greek Taxon Information System (GTIS), an initiative of the LifeWatchGreece Research Infrastructure (ESFRI) that has resumed efforts to compile a complete checklist of species recorded from Greece. An updated checklist of Porifera was created on the basis of a list of the Aegean Demospongiae and Homoscleromorpha published one decade ago. All records of species known to occur in Greek waters were taxonomically validated and cross-checked for possible inaccuracies and omissions. Then, all recent publications were reviewed and the species recorded from 2006 to date were added to the list. New information The updated checklist of Porifera of Greece comprises 215 species, classified to 111 genera, 65 families, 24 orders, and 4 classes. In total, 34 new additions were made to the previous species list (8 Calcarea, 17 Demospongiae, 1 Hexactinellida, and 6 Homoscleromorpha) with Calcarea being listed for the first time from the area. The demosponge orders Poecilosclerida, Dictyoceratida, Tetractinellida, Haplosclerida, and Suberitida have the highest number of species covering 62% of the known Greek sponge species richness. It is worth mentioning that 8 species have been first described from Greek waters, 7 of which are considered endemic to this area. Our bibliographic overview also revealed knowledge gaps with regard to specific habitats typically rich in sponge diversity, and marine sectors of Greece. PMID:27932903

  9. Fatigue in Multiple Sclerosis: (An update

    Directory of Open Access Journals (Sweden)

    Hossein Zarei

    2007-10-01

    Full Text Available BACKGROUND:To study the dimensions of fatigue in multiple sclerosis, its pathophysiology, the efficacy, tolerability and safety of drug and non-drug treatments and measurement of fatigue. METHODS: Relevant articles from PubMed and Google scholar search engines from January 1987 until September 2006 were studied to compose a short clinical update (not a systematic review and make the required clinical information available for the clinicians. RESULTS: There is evidence that fatigue is very common in all types and stages of multiple sclerosis, but its pathophysiology is not well explained. Consequently, few drug options have been offered for its treatment. Amantadine is the bestknown drug, though its efficacy and duration of action are limited. Pemoline and modafinil are alternatives and have
    some effects on fatigue. DAP (diaminopyridine, ASA (acetylsalicylic acid, methylphenidate and fluoxetine are other possible options but await further confirmation. Neurorehabilitation, regular exercise and cooling are confirmed to be of value in MS treatment. Measurement of fatigue is a complicated issue. At present fatigue does not have a laboratory marker. CONCLUSIONS: The results of this short clinical update provide guidelines for diagnosing MS-related fatigue and differentiating
    it from other similar physical and psychological conditions. It also examines prescription drug options and other therapies for MS patients with fatigue.
    KEYWORDS: Multiple sclerosis, fatigue, pathophysiology, treatment, measurement.

  10. Standard chemical exergy of elements updated

    Energy Technology Data Exchange (ETDEWEB)

    Rivero, R. [Instituto Mexicano del Petroleo, Grupo de Exergia, Eje Central Lazaro Cardenas 152, 07730, Mexico, D.F. (Mexico)]. E-mail: rrivero@imp.mx; Garfias, M. [Instituto Mexicano del Petroleo, Grupo de Exergia, Eje Central Lazaro Cardenas 152, 07730, Mexico, D.F. (Mexico)

    2006-12-15

    The chemical exergy of a substance is the maximum work that can be obtained from it by taking it to chemical equilibrium with the reference environment at constant temperature and pressure. This exergy is normally taken or calculated from tabulated values obtained for standard conditions, i.e. an ambient temperature of 298.15 K, an atmospheric pressure of 1 atm, and a model of reference species which considers the concentration of the most common components of the atmosphere, the oceans and the Earth's crust. The model proposed by Szargut for the calculation of the standard chemical exergy of elements and organic and inorganic substances has been revised. As a result of this revision, updated values of standard chemical exergy of elements are presented and compared with the ones estimated by Szargut. Because of some anomalous behaviour in the chemical exergy when a different salinity of seawater is assumed, some different reference species than those used in the latest version of the Szargut model were proposed for the following elements: silver, gold, barium, calcium, cadmium, copper, mercury, magnesium, nickel, lead, strontium and zinc. A complete set of updated values of chemical exergies of elements for the standard conditions (298.15 K and 1 atm) is tabulated.

  11. Least squares approach for initial data recovery in dynamic data-driven applications simulations

    KAUST Repository

    Douglas, C.

    2010-12-01

    In this paper, we consider the initial data recovery and the solution update based on the local measured data that are acquired during simulations. Each time new data is obtained, the initial condition, which is a representation of the solution at a previous time step, is updated. The update is performed using the least squares approach. The objective function is set up based on both a measurement error as well as a penalization term that depends on the prior knowledge about the solution at previous time steps (or initial data). Various numerical examples are considered, where the penalization term is varied during the simulations. Numerical examples demonstrate that the predictions are more accurate if the initial data are updated during the simulations. © Springer-Verlag 2011.

  12. Adaptive Nonlinear Model Predictive Control Using an On-line Support Vector Regression Updating Strategy

    Institute of Scientific and Technical Information of China (English)

    Ping Wang; Chaohe Yang; Xuemin Tian; Dexian Huang

    2014-01-01

    The performance of data-driven models relies heavily on the amount and quality of training samples, so it might deteriorate significantly in the regions where samples are scarce. The objective of this paper is to develop an on-line SVR model updating strategy to track the change in the process characteristics efficiently with affordable computational burden. This is achieved by adding a new sample that violates the Karush-Kuhn-Tucker condi-tions of the existing SVR model and by deleting the old sample that has the maximum distance with respect to the newly added sample in feature space. The benefits offered by such an updating strategy are exploited to develop an adaptive model-based control scheme, where model updating and control task perform alternately. The effectiveness of the adaptive controller is demonstrated by simulation study on a continuous stirred tank reactor. The results reveal that the adaptive MPC scheme outperforms its non-adaptive counterpart for large-magnitude set point changes and variations in process parameters.

  13. Hydraulic model with roughness coefficient updating method based on Kalman filter for channel flood forecast

    Directory of Open Access Journals (Sweden)

    Hong-jun BAO

    2011-03-01

    Full Text Available A real-time channel flood forecast model was developed to simulate channel flow in plain rivers based on the dynamic wave theory. Taking into consideration channel shape differences along the channel, a roughness updating technique was developed using the Kalman filter method to update Manning’s roughness coefficient at each time step of the calculation processes. Channel shapes were simplified as rectangles, triangles, and parabolas, and the relationships between hydraulic radius and water depth were developed for plain rivers. Based on the relationship between the Froude number and the inertia terms of the momentum equation in the Saint-Venant equations, the relationship between Manning’s roughness coefficient and water depth was obtained. Using the channel of the Huaihe River from Wangjiaba to Lutaizi stations as a case, to test the performance and rationality of the present flood routing model, the original hydraulic model was compared with the developed model. Results show that the stage hydrographs calculated by the developed flood routing model with the updated Manning’s roughness coefficient have a good agreement with the observed stage hydrographs. This model performs better than the original hydraulic model.

  14. Step Size Bound of the Sequential Partial Update LMS Algorithm with Periodic Input Signals

    Directory of Open Access Journals (Sweden)

    Pedro Ramos

    2006-12-01

    Full Text Available This paper derives an upper bound for the step size of the sequential partial update (PU LMS adaptive algorithm when the input signal is a periodic reference consisting of several harmonics. The maximum step size is expressed in terms of the gain in step size of the PU algorithm, defined as the ratio between the upper bounds that ensure convergence in the following two cases: firstly, when only a subset of the weights of the filter is updated during every iteration; and secondly, when the whole filter is updated at every cycle. Thus, this gain in step-size determines the factor by which the step size parameter can be increased in order to compensate the inherently slower convergence rate of the sequential PU adaptive algorithm. The theoretical analysis of the strategy developed in this paper excludes the use of certain frequencies corresponding to notches that appear in the gain in step size. This strategy has been successfully applied in the active control of periodic disturbances consisting of several harmonics, so as to reduce the computational complexity of the control system without either slowing down the convergence rate or increasing the residual error. Simulated and experimental results confirm the expected behavior.

  15. Synchronization dynamics in diverse ensemble of noisy phase oscillators with asynchronous phase updates

    Science.gov (United States)

    Belan, S.

    2015-12-01

    Decentralized control of autonomous phase oscillators integrated into networked systems is of great interest for many technological applications, from clock synchronization in sensor nets to coordinated motion in swarm robotics. In the simplest distributed synchronization scheme, each oscillator updates its phase from time to time to a new value equal to the average of its present phase and the phases of its neighbors. Here we describe the resulting synchronization dynamics within a mean-field model where the update actions of different oscillators are completely asynchronous. In particular, it is shown how the steady-state level of synchrony depends on noise intensity and frequency diversity for any given rate of updates. The central part of the analysis is devoted to the case when the correction rate positively correlates with the degree of macroscopic coherence. We demonstrate that depending on relation between correction rate and phase coherence the oscillators may exhibit both continuous and discontinuous transition from incoherence to synchrony upon the change of interaction constant. To illustrate our analytical results, numerical simulations have been performed for a large population of phase oscillators with the proposed type of coupling.

  16. Synchronization dynamics in diverse ensemble of noisy phase oscillators with asynchronous phase updates.

    Science.gov (United States)

    Belan, S

    2015-12-01

    Decentralized control of autonomous phase oscillators integrated into networked systems is of great interest for many technological applications, from clock synchronization in sensor nets to coordinated motion in swarm robotics. In the simplest distributed synchronization scheme, each oscillator updates its phase from time to time to a new value equal to the average of its present phase and the phases of its neighbors. Here we describe the resulting synchronization dynamics within a mean-field model where the update actions of different oscillators are completely asynchronous. In particular, it is shown how the steady-state level of synchrony depends on noise intensity and frequency diversity for any given rate of updates. The central part of the analysis is devoted to the case when the correction rate positively correlates with the degree of macroscopic coherence. We demonstrate that depending on relation between correction rate and phase coherence the oscillators may exhibit both continuous and discontinuous transition from incoherence to synchrony upon the change of interaction constant. To illustrate our analytical results, numerical simulations have been performed for a large population of phase oscillators with the proposed type of coupling.

  17. Likelihood updating of random process load and resistance parameters by monitoring

    DEFF Research Database (Denmark)

    Friis-Hansen, Peter; Ditlevsen, Ove Dalager

    2003-01-01

    . The numerical problem caused by these singularities is easily overcome by adding simulated low intensity white noise to the realization. Without changing its parameters the spectrum is hereby lifted above zero by an amount equal to the white noise intensity. The knowledge of an explicit likelihood function......, even though it is of complicated mathematical form, allows an approximate Bayesian updating and control of the time development of the parameters. Some of these parameters can be structural parameters that by too much change reveal progressing damage or other malfunctioning. Thus current process...

  18. Updates on Projections of Physics Reach with the Upgraded CMS Detector for High Luminosity LHC

    CERN Document Server

    CMS Collaboration

    2016-01-01

    This document contains updates on projections of physics reach with the upgraded CMS detector for HL-LHC. Selected measurements in Higgs Physics, Top Physics, Heavy Flavor physics, Searches for Dark Matter and new Heavy particles highlighting the performance of the planned upgrades of the CMS detector. The projections take into account the effects of high pileup conditions and detector performance, based on the CMS Phase II Technical Proposal (CMS-TDR-15-002). Some of the studies are performed using the Delphes fast simulation of the upgraded CMS detector.

  19. Single Shot Digital Holography Using Iterative Reconstruction with Alternating Updates of Amplitude and Phase

    CERN Document Server

    Lee, Dennis J; Weiner, Andrew M

    2016-01-01

    We present an image recovery approach to improve amplitude and phase reconstruction from single shot digital holograms, using iterative reconstruction with alternating updates. This approach allows the flexibility to apply different priors to amplitude and phase, improves phase reconstruction in image areas with low amplitudes, and does not require phase unwrapping for regularization. Phantom simulations and experimental measurements of a grating sample both demonstrate that the proposed method helps to reduce noise and resolve finer features. The improved image reconstruction from this technique will benefit the many applications of digital holography.

  20. Map updates in a dynamic Voronoi data structure

    DEFF Research Database (Denmark)

    Mioc, Darka; Antón Castro, Francesc/François; Gold, C. M.;

    2006-01-01

    the complex operations. This resulted in a new formal model for map updates, similar to "cellular encoding", where each update is uniquely characterized by the numbers of newly created and inactivated Voronoi regions. This research shows that the result of the formalization of the operations on the dynamic...