National Library of Energy BETA

Sample records for nearby offline features

  1. DUSTY WINDS: EXTRAPLANAR POLYCYCLIC AROMATIC HYDROCARBON FEATURES OF NEARBY GALAXIES

    SciTech Connect

    McCormick, Alexander; Veilleux, Sylvain; Rupke, David S. N. E-mail: veilleux@astro.umd.edu

    2013-09-10

    Recent observations have shown the presence of dust and molecular material in galactic winds, but relatively little is known about the distribution of these outflow components. To shed some light on this issue, we have used IRAC images from the Spitzer Space Telescope archive to investigate polycyclic aromatic hydrocarbon (PAH) emission from a sample of 16 local galaxies with known winds. Our focus on nearby sources (median distance 8.6 Mpc) has revealed detailed PAH structure in the winds and allowed us to measure extraplanar PAH emission. We have identified extraplanar PAH features on scales of {approx}0.8-6.0 kpc. We find a nearly linear correlation between the amount of extraplanar PAH emission and the total infrared flux, a proxy for star formation activity in the disk. Our results also indicate a correlation between the height of extraplanar PAH emission and star formation rate surface density, which supports the idea of a surface density threshold on the energy or momentum injection rate for producing detectable extraplanar wind material.

  2. Offline solid phase microextraction sampling system

    DOEpatents

    Harvey, Chris A.

    2008-12-16

    An offline solid phase microextraction (SPME) sampling apparatus for enabling SPME samples to be taken a number of times from a previously collected fluid sample (e.g. sample atmosphere) stored in a fused silica lined bottle which keeps volatile organics in the fluid sample stable for weeks at a time. The offline SPME sampling apparatus has a hollow body surrounding a sampling chamber, with multiple ports through which a portion of a previously collected fluid sample may be (a) released into the sampling chamber, (b) SPME sampled to collect analytes for subsequent GC analysis, and (c) flushed/purged using a fluidically connected vacuum source and purging fluid source to prepare the sampling chamber for additional SPME samplings of the same original fluid sample, such as may have been collected in situ from a headspace.

  3. Full Core Multiphysics Simulation with Offline Mesh Deformation

    SciTech Connect

    Merzari, E.; Shemon, E. R.; Yu, Y.; Thomas, J. W.; Obabko, A.; Jain, Rajeev; Mahadevan, Vijay; Solberg, Jerome; Ferencz, R.; Whitesides, R.

    2015-12-21

    In this report, building on previous reports issued in FY13 we describe our continued efforts to integrate thermal/hydraulics, neutronics, and structural mechanics modeling codes to perform coupled analysis of a representative fast sodium-cooled reactor core. The focus of the present report is a full core simulation with off-line mesh deformation.

  4. A study of the arrival direction using Offline

    SciTech Connect

    Flores, Alejandra Parra; Bravo, Oscar Martinez; Ibargueen, Humberto Salazar; Aguilar, Ibrahim Torres

    2009-04-30

    The purpose of this work is to show the results of the analysis of a library of synthetic data corresponding to Very Inclined Showers (i.e. those with a zenith angle between 60 and 80 degrees and energies from 50 EeV to 80 EeV). Simulations were performed using the Aires software and then analyzed to narrow down the arrival angles that allow us an efficient shower reconstruction using the Offline software.

  5. ARM - Publications: Science Team Meeting Documents: OFFLINE GCSS

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    INTERCOMPARISON STUDY OF CLOUD - RADIATION INTERACTION AND SURFACE FLUXES OFFLINE GCSS INTERCOMPARISON STUDY OF CLOUD - RADIATION INTERACTION AND SURFACE FLUXES Tao, Wei-Kuo NASA/Goddard Space Flight Center Simulations of deep tropical clouds by both cloud-resolving models (CRMs) and single-column models (SCMs) in the GEWEX Cloud System Study (GCSS) Working Group 4 (WG4; Precipitating Convective Cloud Systems), Case 2 (19-27 December 1992, TOGA-COARE IFA) have produced large differences in

  6. THE GALEX NEARBY YOUNG-STAR SURVEY

    SciTech Connect

    Rodriguez, David R.; Faherty, Jacqueline K.; Zuckerman, B.; Kastner, Joel H.; Bessell, M. S.; Murphy, Simon J.

    2013-09-10

    We describe a method that exploits data from the Galaxy Evolution Explorer (GALEX) ultraviolet and Wide-field Infrared Survey Explorer and Two Micron All Sky Survey infrared source catalogs, combined with proper motions and empirical pre-main sequence isochrones, to identify candidate nearby, young, low-mass stars. Applying our method across the full GALEX-covered sky, we identify 2031 mostly M-type stars that, for an assumed age of 10 (100) Myr, all lie within {approx}150 ({approx}90) pc of Earth. The distribution of M spectral subclasses among these {approx}2000 candidate young stars peaks sharply in the range M3-M4; these subtypes constitute 50% of the sample, consistent with studies of the M star population in the immediate solar neighborhood. We focus on a subset of 58 of these candidate young M stars in the vicinity of the Tucana-Horologium association. Only 20 of these 58 candidates were detected in the ROSAT All-Sky X-ray Survey-reflecting the greater sensitivity of GALEX for the purposes of identifying active nearby, young stars, particularly for stars of type M4 and later. Based on statistical analysis of the kinematics and/or spectroscopic followup of these 58 M stars, we find that 50% (29 stars) indeed have properties consistent with Tuc-Hor membership, while 12 are potential new members of the Columba association, and 2 may be AB Dor moving group members. Hence, {approx}75% of our initial subsample of 58 candidates are likely members of young (age {approx} 10-40 Myr) stellar moving groups within 100 pc, verifying that the stellar color- and kinematics-based selection algorithms described here can be used to efficiently isolate nearby, young, low-mass objects from among the field star population. Future studies will focus on characterizing additional subsamples selected from among this list of candidate nearby, young M stars.

  7. Orbital masses of nearby luminous galaxies

    SciTech Connect

    Karachentsev, Igor D.; Kudrya, Yuri N. E-mail: yukudrya@gmail.com

    2014-09-01

    We use observational properties of galaxies accumulated in the Updated Nearby Galaxy Catalog to derive a dark matter mass of luminous galaxies via motions of their companions. The data on orbital-to-stellar mass ratio are presented for 15 luminous galaxies situated within 11 Mpc from us: the Milky Way, M31, M81, NGC 5128, IC342, NGC 253, NGC 4736, NGC 5236, NGC 6946, M101, NGC 4258, NGC 4594, NGC 3115, NGC 3627, and NGC 3368, as well as for a composite suite around other nearby galaxies of moderate and low luminosity. The typical ratio for these galaxies is M {sub orb}/M {sub *} = 31, corresponding to the mean local density of matter ? {sub m} = 0.09, i.e., one-third of the global cosmic density. This quantity seems to be rather an upper limit of dark matter density, since the peripheric population of the suites may suffer from the presence of fictitious unbound members. We note that the Milky Way and M31 halos have lower dimensions and lower stellar masses than those of the other 13 nearby luminous galaxies. However, the dark-to-stellar mass ratio for both the Milky Way and M31 is typical for other neighboring luminous galaxies. The distortion in the Hubble flow, observed around the Local Group and five other neighboring groups, yields their total masses within the radius of a zero velocity surface, R {sub 0}; these masses are slightly lower than the orbital and virial values. This difference may be due to the effect of dark energy producing a kind of 'mass defect' within R {sub 0}.

  8. Off-line compatible electronic cash method and system

    SciTech Connect

    Kravitz, David W.; Gemmell, Peter S.; Brickell, Ernest F.

    1998-01-01

    An off-line electronic cash system having an electronic coin, a bank B, a payee S, and a user U with an account at the bank B as well as a user password z.sub.u,i, has a method for performing an electronic cash transfer. An electronic coin is withdrawn from the bank B by the user U and an electronic record of the electronic coin is stored by the bank B. The coin is paid to the payee S by the user U. The payee S deposits the coin with the bank B. A determination is made that the coin is spent and the record of the coin is deleted by the bank B. A further deposit of the same coin after the record is deleted is determined. Additionally, a determination is made which user U originally withdrew the coin after deleting the record. To perform these operations a key pair is generated by the user, including public and secret signature keys. The public signature key along with a user password z.sub.u,i and a withdrawal amount are sent to the bank B by the user U. In response, the bank B sends a coin to the user U signed by the secret key of the bankindicating the value of the coin and the public key of the user U. The payee S transmits a challenge counter to the user U prior to receiving the coin.

  9. Off-line compatible electronic cash method and system

    DOEpatents

    Kravitz, D.W.; Gemmell, P.S.; Brickell, E.F.

    1998-11-03

    An off-line electronic cash system having an electronic coin, a bank B, a payee S, and a user U with an account at the bank B as well as a user password z{sub u,i}, has a method for performing an electronic cash transfer. An electronic coin is withdrawn from the bank B by the user U and an electronic record of the electronic coin is stored by the bank B. The coin is paid to the payee S by the user U. The payee S deposits the coin with the bank B. A determination is made that the coin is spent and the record of the coin is deleted by the bank B. A further deposit of the same coin after the record is deleted is determined. Additionally, a determination is made which user U originally withdrew the coin after deleting the record. To perform these operations a key pair is generated by the user, including public and secret signature keys. The public signature key along with a user password z{sub u,i} and a withdrawal amount are sent to the bank B by the user U. In response, the bank B sends a coin to the user U signed by the secret key of the bank indicating the value of the coin and the public key of the user U. The payee S transmits a challenge counter to the user U prior to receiving the coin. 16 figs.

  10. Interaction between Cassiopeia A and nearby molecular clouds

    SciTech Connect

    Kilpatrick, C. D.; Bieging, J. H.; Rieke, G. H.

    2014-12-01

    We present spectroscopy of the supernova remnant Cassiopeia A (Cas A) observed at infrared wavelengths from 10 to 40 ?m with the Spitzer Space Telescope and at millimeter wavelengths in {sup 12}CO and {sup 13}CO J =2-1 (230 and 220 GHz) with the Heinrich Hertz Submillimeter Telescope. The IR spectra demonstrate high-velocity features toward a molecular cloud coincident with a region of bright radio continuum emission along the northern shock front of Cas A. The millimeter observations indicate that CO emission is broadened by a factor of two in some clouds toward Cas A, particularly to the south and west. We believe that these features trace interactions between the Cas A shock front and nearby molecular clouds. In addition, some of the molecular clouds that exhibit broadening in CO lie 1'-2' away from the furthest extent of the supernova remnant shock front. We propose that this material may be accelerated by ejecta with velocity significantly larger than the observed free-expansion velocity of the Cas A shock front. These observations may trace cloud interactions with fast-moving outflows such as the bipolar outflow along the southwest to northeast axis of the Cas A supernova remnant, as well as fast-moving knots seen emerging in other directions.

  11. Supernova Discoveries from the Nearby Supernova Factory (SNfactory) () |

    Office of Scientific and Technical Information (OSTI)

    Data Explorer Discoveries from the Nearby Supernova Factory (SNfactory) Title: Supernova Discoveries from the Nearby Supernova Factory (SNfactory) The Nearby Supernova Factory is an experiment designed to collect data on more Type Ia supernovae than have ever been studied in a single project before, and in so doing, to answer some fundamental questions about the nature of the universe. Type Ia supernovae are extraordinarily bright, remarkably uniform objects which make excellent

  12. Constraints on decaying dark matter from Fermi observations of nearby galaxies and clusters

    SciTech Connect

    Dugger, Leanna; Profumo, Stefano; Jeltema, Tesla E. E-mail: tesla@ucolick.org

    2010-12-01

    We analyze the impact of Fermi gamma-ray observations (primarily non-detections) of selected nearby galaxies, including dwarf spheroidals, and of clusters of galaxies on decaying dark matter models. We show that the fact that galaxy clusters do not shine in gamma rays puts the most stringent limits available to-date on the lifetime of dark matter particles for a wide range of particle masses and decay final states. In particular, our results put strong constraints on the possibility of ascribing to decaying dark matter both the increasing positron fraction reported by PAMELA and the high-energy feature in the electron-positron spectrum measured by Fermi. Observations of nearby dwarf galaxies and of the Andromeda Galaxy (M31) do not provide as strong limits as those from galaxy clusters, while still improving on previous constraints in some cases.

  13. Object Classification at the Nearby Supernova Factory (Journal...

    Office of Scientific and Technical Information (OSTI)

    Nearby Supernova Factory Citation Details In-Document ... Report Number(s): LBNL-696E TRN: US200815%%72 DOE Contract Number: DE-AC02-05CH11231 Resource Type: Journal Article ...

  14. Featured Announcements

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    June 2014 NERSC User Announcements RSS Feed June 30, 2014 by Richard Gerber NERSC's User Announcements (not these "Featured Announcements") are now available as an RSS feed. Point...

  15. IDENTIFYING NEARBY, YOUNG, LATE-TYPE STARS BY MEANS OF THEIR CIRCUMSTELLAR DISKS

    SciTech Connect

    Schneider, Adam; Song, Inseok; Melis, Carl; Zuckerman, B.; Bessell, Mike E-mail: song@physast.uga.edu E-mail: ben@astro.ucla.edu

    2012-10-01

    It has recently been shown that a significant fraction of late-type members of nearby, very young associations (age {approx}<10 Myr) display excess emission at mid-IR wavelengths indicative of dusty circumstellar disks. We demonstrate that the detection of mid-IR excess emission can be utilized to identify new nearby, young, late-type stars including two definite new members ('TWA 33' and 'TWA 34') of the TW Hydrae Association (TWA). Both new TWA members display mid-IR excess emission in the Wide-field Infrared Survey Explorer catalog and they show proper motion and youthful spectroscopic characteristics-namely, H{alpha} emission, strong lithium absorption, and low surface gravity features consistent with known TWA members. We also detect mid-IR excess-the first unambiguous evidence of a dusty circumstellar disk-around a previously identified UV-bright, young, accreting star (2M1337) that is a likely member of the Lower-Centaurus Crux region of the Scorpius-Centaurus Complex.

  16. SU-C-303-04: Evaluation of On- and Off-Line Bioluminescence Tomography System for Focal Irradiation Guidance

    SciTech Connect

    Zhang, B; Wang, K; Reyes, J; Tran, P; Wong, J; Iordachita, I

    2015-06-15

    Purpose: We have developed offline and on-board bioluminescence tomography(BLT) systems for the small animal radiation research platform(SARRP) for radiation guidance of soft tissue targets. We investigated the effectiveness of offline BLT guidance. Methods: CBCT is equipped on both the offline BLT system and SARRP that are 10 ft. apart. To evaluate the setup error during animal transport between the two systems, we implanted a luminescence source in the abdomen of anesthetized mice. Five mice were studied. After CBCT was acquired on both systems, source centers and correlation coefficients were calculated. CBCT was also used to generate object mesh for BLT reconstruction. To assess target localization, we compared the localization of the luminescence source based on (1)on-board SARRP BLT and CBCT, (2)offline BLT and CBCT, and (3)offline BLT and SARRP CBCT. The 3rd comparison examines if an offline BLT system can be used to guide radiation when there is minimal target contrast in CBCT. Results: Our CBCT results show the offset of the light source center can be maintained within 0.2 mm during animal transport. The center of mass(CoM) of the light source reconstructed by the offline BLT has an offset of 1.0 ± 0.4 mm from the ‘true’ CoM as derived from the SARRP CBCT. The results compare well with the offset of 1.0 ± 0.2 mm using on-line BLT. Conclusion: With CBCT information provided by the SARRP and effective animal immobilization during transport, these findings support the use of offline BLT in close vicinity for accurate soft tissue target localization for irradiation. However, the disadvantage of the off-line system is reduced efficiency as care is required to maintain stable animal transport. We envisage a dual use system where the on-board arrangement allows convenient access to CBCT and avoids disturbance of animal setup. The off-line capability would support standalone longitudinal imaging studies. The work is supported by NIH R01CA158100 and Xstrahl

  17. Stellar and gaseous nuclear disks observed in nearby (U)LIRGs...

    Office of Scientific and Technical Information (OSTI)

    Stellar and gaseous nuclear disks observed in nearby (U)LIRGs Citation Details In-Document Search Title: Stellar and gaseous nuclear disks observed in nearby (U)LIRGs We present ...

  18. ARM - Features

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    CenterFeatures Media Contact Hanna Goss hanna-dot-goss-at-pnnl-dot-gov @armnewsteam Field Notes Blog Topics Field Notes118 AGU 3 AMIE 10 ARM Aerial Facility 2 ARM Mobile Facility 1 7 ARM Mobile Facility 2 47 ARM Mobile Facility 3 1 BAECC 1 BBOP 4 CARES 1 Data Quality Office 2 ENA 2 GOAMAZON 7 HI-SCALE 5 LASIC 3 MAGIC 15 MC3E 17 PECAN 3 SGP 8 STORMVEX 29 TCAP 3 Search News Search Blog News Center All Categories What's this? Social Media Guidance News Center All Categories Features and Releases

  19. Featured Announcements

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    May 2014 Nobel Lecture Videos Now Available Online May 29, 2014 by Kathy Kincade Three of the NERSC Nobel Lecture Series videos -- featuring John Kuriyan, Warren Washington, George Smoot, and Saul Perlmutter -- are now available for viewing. Read the full post Xeon Phi Nationwide training sessions available from Intel May 7, 2014 by Katie Antypas NERSC's next supercomputer, Cori, will using the Xeon Phi processor architecture. In order to achieve high performance on Xeon Phi, users will need to

  20. Featured Announcements

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    September 2016 Call for Proposals: NESAP for Data September 27, 2016 by Rollin Thomas NERSC is now accepting applications for participation in the NERSC Exascale Science Applications Program (NESAP) from developers of data-intensive science applications (NESAP for Data). NESAP is a highly successful collaborative effort where NERSC partners with code teams and library and tool developers to prepare for the NERSC-8 Cori manycore architecture. A key feature of the Cori system is the Intel Xeon Phi

  1. Evaluation of the accuracy of an offline seasonally-varying matrix transport model for simulating ideal age

    DOE PAGES [OSTI]

    Bardin, Ann; Primeau, Francois; Lindsay, Keith; Bradley, Andrew

    2016-07-21

    Newton-Krylov solvers for ocean tracers have the potential to greatly decrease the computational costs of spinning up deep-ocean tracers, which can take several thousand model years to reach equilibrium with surface processes. One version of the algorithm uses offline tracer transport matrices to simulate an annual cycle of tracer concentrations and applies Newton’s method to find concentrations that are periodic in time. Here we present the impact of time-averaging the transport matrices on the equilibrium values of an ideal-age tracer. We compared annually-averaged, monthly-averaged, and 5-day-averaged transport matrices to an online simulation using the ocean component of the Community Earthmore » System Model (CESM) with a nominal horizontal resolution of 1° × 1° and 60 vertical levels. We found that increasing the time resolution of the offline transport model reduced a low age bias from 12% for the annually-averaged transport matrices, to 4% for the monthly-averaged transport matrices, and to less than 2% for the transport matrices constructed from 5-day averages. The largest differences were in areas with strong seasonal changes in the circulation, such as the Northern Indian Ocean. As a result, for many applications the relatively small bias obtained using the offline model makes the offline approach attractive because it uses significantly less computer resources and is simpler to set up and run.« less

  2. Featured Announcements

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    January 2014 NERSC's 40th Anniversary Kicks Off with a Special User Group Meeting January 15, 2014 by Francesca Verdier Registration is now open for NUG 2014, the annual meeting of the NERSC Users' Group, Feb. 3-6, 2014. This year's NUG meeting is special, it kicks off NERSC's 40th anniversary celebration. The highlight of NUG 2014 is a two-day "Celebration of Science and Technology" featuring talks by Berkeley Lab's Horst Simon and Kathy Yelick, NERSC Director Sudip Dosanjh, prominent

  3. High Statistics Study of Nearby Type 1a Supernovae. QUEST Camera...

    Office of Scientific and Technical Information (OSTI)

    QUEST Camera Short Term Maintenance: Final Technical Report Citation Details In-Document Search Title: High Statistics Study of Nearby Type 1a Supernovae. QUEST Camera Short Term ...

  4. High Statistics Study of Nearby Type 1a Supernovae. QUEST Camera...

    Office of Scientific and Technical Information (OSTI)

    Statistics Study of Nearby Type 1a Supernovae. QUEST Camera Short Term Maintenance: Final Technical Report Baltay, Charles 79 ASTRONOMY AND ASTROPHYSICS Study of Type 1a Supernovae...

  5. Nearby-fluids equilibria. II. Zonal flows in a high-{beta}, self-organized plasma experiment

    SciTech Connect

    Steinhauer, L.C.; Guo, H.Y.

    2006-05-15

    The field and flow structure observed in a high-{beta} field reversed configuration (FRC) produced in the translation, confinement, and sustainment (TCS) experiment are modeled using the newly developed nearby-fluids equilibrium model. These results are the first evidence that experimental FRCs have complex flows, that is nonrigid rotational flow and poloidal flow, both with maximum speeds nearly half the Alfven speed. The interpretive approach is an innovative 'backwards' method using the nearby-fluids platform for two-fluid equilibria. The most remarkable outcome is the prediction of a poloidal flow structure with significant zonal features. The poloidal flow has never been directly measured in FRCs; thus this discovery results from applying the flowing equilibrium model as an interpretive tool. The poloidal flows explain the unusual toroidal field structure observed in TCS. Zonal features in the rotational flow are also inferred from the unfolding of chord-integrated measurements. The results also indicated that a broad core of the FRC is very close to a minimum energy state.

  6. Supernova Discoveries from the Nearby Supernova Factory (SNfactory)

    DOE Data Explorer

    SNfactory International Collaboration,

    The Nearby Supernova Factory is an experiment designed to collect data on more Type Ia supernovae than have ever been studied in a single project before, and in so doing, to answer some fundamental questions about the nature of the universe. Type Ia supernovae are extraordinarily bright, remarkably uniform objects which make excellent "standard candles" for measuring the expansion rate of the universe. However, such stellar explosions are very rare, occurring only a couple of times per millenium in a typical galaxy, and remaining bright enough to detect only for a few weeks. Previous studies of Type Ia supernovae led to the discovery of the mysterious "dark energy" that is causing the universe to expand at an accelerating rate. To reduce the statistical uncertainties in previous experimental data, extensive spectral and photometric monitoring of more Type Ia supernovae is required. The SNfactory collaboration has built an automated system consisting of specialized software and custom-built hardware that systematically searches the sky for new supernovae, screens potential candidates, then performs multiple spectral and photometric observations on each supernova. These observations are stored in a database to be made available to supernova researchers world-wide for further study and analysis [copied from http://snfactory.lbl.gov/snf/snf-about.html]. Users must register and agree to the open access honor system. Finding charts are in FITS format and may not be accessible through normal browser settings.

  7. LOW-MASS VISUAL COMPANIONS TO NEARBY G-DWARFS

    SciTech Connect

    Tokovinin, Andrei

    2011-02-15

    A complete census of wide visual companions to nearby G-dwarf stars can be achieved by selecting candidates from the Two Micron All Sky Survey (2MASS) Point-Source Catalog and checking their status by second-epoch imaging. Such data are obtained for 124 candidates with separations up to 20'', 47 of which are shown to be new physical low-mass stellar companions. A list of visual binaries with G-dwarf primaries is produced by combining newly found companions with historical data. Maximum likelihood analysis leads to a companion frequency of 0.13 {+-} 0.015 per decade of separation. The mass ratio is distributed almost uniformly, with a power-law index between -0.4 and 0. The remaining uncertainty in the index is related to modeling of the companion detection threshold in 2MASS. These findings are confirmed by an alternative analysis of wider companions in 2MASS, removing the contamination by background stars statistically. Extension of this work will lead to a complete detection of visual companions-a necessary step toward reaching unbiased multiplicity statistics over the full range of orbital periods and, eventually, understanding the origin of multiple systems.

  8. Evaluation of Online/Offline Image Guidance/Adaptation Approaches for Prostate Cancer Radiation Therapy

    SciTech Connect

    Qin, An; Sun, Ying; Liang, Jian; Yan, Di

    2015-04-01

    Purpose: To evaluate online/offline image-guided/adaptive treatment techniques for prostate cancer radiation therapy with daily cone-beam CT (CBCT) imaging. Methods and Materials: Three treatment techniques were evaluated retrospectively using daily pre- and posttreatment CBCT images on 22 prostate cancer patients. Prostate, seminal vesicles (SV), rectal wall, and bladder were delineated on all CBCT images. For each patient, a pretreatment intensity modulated radiation therapy plan with clinical target volume (CTV) = prostate + SV and planning target volume (PTV) = CTV + 3 mm was created. The 3 treatment techniques were as follows: (1) Daily Correction: The pretreatment intensity modulated radiation therapy plan was delivered after online CBCT imaging, and position correction; (2) Online Planning: Daily online inverse plans with 3-mm CTV-to-PTV margin were created using online CBCT images, and delivered; and (3) Hybrid Adaption: Daily Correction plus an offline adaptive inverse planning performed after the first week of treatment. The adaptive plan was delivered for all remaining 15 fractions. Treatment dose for each technique was constructed using the daily posttreatment CBCT images via deformable image registration. Evaluation was performed using treatment dose distribution in target and critical organs. Results: Treatment equivalent uniform dose (EUD) for the CTV was within [85.6%, 100.8%] of the pretreatment planned target EUD for Daily Correction; [98.7%, 103.0%] for Online Planning; and [99.2%, 103.4%] for Hybrid Adaptation. Eighteen percent of the 22 patients in Daily Correction had a target dose deficiency >5%. For rectal wall, the mean ± SD of the normalized EUD was 102.6% ± 2.7% for Daily Correction, 99.9% ± 2.5% for Online Planning, and 100.6% ± 2.1% for Hybrid Adaptation. The mean ± SD of the normalized bladder EUD was 108.7% ± 8.2% for Daily Correction, 92.7% ± 8.6% for Online Planning, and 89.4% ± 10.8% for Hybrid

  9. CDF trigger final balance: Offline resolution at low level selections to fight against Tevatron increasing luminosity

    SciTech Connect

    Amerio, S.; /Padua U. /INFN, Padua

    2010-01-01

    The CDF detector at Tevatron collider is at present the most long-lasting high energy physics experiment. Since its first data taking in 1992 it has produced many results of primary importance, such as the discovery of top quark and, more recently, the observations of Bs oscillations and single-top production. None of them would have been possible without a fast and efficient trigger system. Based on a three level architecture, the CDF trigger takes decisions on simple calorimetric and tracking objects and assures both high efficiency on signal events and low dead time. It reduces the data flow rate from 2.53 MHz, the collision rate, to 150 Hz, the current limit on tape writing and is flexible enough to be easily adapted to the continuously growing instantaneous luminosity. In the last years the Tevatron instantaneous luminosity has rapidly increased and is now reaching 4 x 10{sup 32} cm{sup -2} s{sup -1}. The CDF trigger system has been widely upgraded to cope with increasing trigger rates. The upgrade result is online reconstruction of missing transverse energy, jets and tracks with a quality comparable to the offline one. Jet energy and direction can be precisely determined and tracks can be subjected to 3-D reconstruction with good resolution. These upgrades reduce high trigger rates to acceptable levels and have provided invaluable tools to increase the purity of the collected samples. They also represent a helpful experience for LHC experiments where background rates will be much more demanding.

  10. Global distribution and surface activity of macromolecules in offline simulations of marine organic chemistry

    DOE PAGES [OSTI]

    Ogunro, Oluwaseun O.; Burrows, Susannah M.; Elliott, Scott; Frossard, Amanda A.; Hoffman, Forrest M.; Letscher, Robert T.; Moore, J. Keith; Russell, Lynn M.; Wang, Shanlin; Wingenter, Oliver W.

    2015-10-13

    Here, organic macromolecules constitute high percentage components of remote sea spray. They enter the atmosphere through adsorption onto bubbles followed by bursting at the ocean surface, and go on to influence the chemistry of the fine mode aerosol. We present a global estimate of mixed-layer organic macromolecular distributions, driven by offline marine systems model output. The approach permits estimation of oceanic concentrations and bubble film surface coverages for several classes of organic compound. Mixed layer levels are computed from the output of a global ocean biogeochemistry model by relating the macromolecules to standard biogeochemical tracers. Steady state is assumed formore » labile forms, and for longer-lived components we rely on ratios to existing transported variables. Adsorption is then represented through conventional Langmuir isotherms, with equilibria deduced from laboratory analogs. Open water concentrations locally exceed one micromolar carbon for the total of protein, polysaccharide and refractory heteropolycondensate. The shorter-lived lipids remain confined to regions of strong biological activity. Results are evaluated against available measurements for all compound types, and agreement is generally quite reasonable. Global distributions are further estimated for both fractional coverage of bubble films at the air-water interface and the two-dimensional concentration excess. Overall, we show that macromolecular mapping provides a novel tool for the comprehension of oceanic surfactant distributions. Results may prove useful in planning field experiments and assessing the potential response of surface chemical behaviors to global change.« less

  11. Global distribution and surface activity of macromolecules in offline simulations of marine organic chemistry

    SciTech Connect

    Ogunro, Oluwaseun O.; Burrows, Susannah M.; Elliott, Scott; Frossard, Amanda A.; Hoffman, Forrest M.; Letscher, Robert T.; Moore, J. Keith; Russell, Lynn M.; Wang, Shanlin; Wingenter, Oliver W.

    2015-10-13

    Here, organic macromolecules constitute high percentage components of remote sea spray. They enter the atmosphere through adsorption onto bubbles followed by bursting at the ocean surface, and go on to influence the chemistry of the fine mode aerosol. We present a global estimate of mixed-layer organic macromolecular distributions, driven by offline marine systems model output. The approach permits estimation of oceanic concentrations and bubble film surface coverages for several classes of organic compound. Mixed layer levels are computed from the output of a global ocean biogeochemistry model by relating the macromolecules to standard biogeochemical tracers. Steady state is assumed for labile forms, and for longer-lived components we rely on ratios to existing transported variables. Adsorption is then represented through conventional Langmuir isotherms, with equilibria deduced from laboratory analogs. Open water concentrations locally exceed one micromolar carbon for the total of protein, polysaccharide and refractory heteropolycondensate. The shorter-lived lipids remain confined to regions of strong biological activity. Results are evaluated against available measurements for all compound types, and agreement is generally quite reasonable. Global distributions are further estimated for both fractional coverage of bubble films at the air-water interface and the two-dimensional concentration excess. Overall, we show that macromolecular mapping provides a novel tool for the comprehension of oceanic surfactant distributions. Results may prove useful in planning field experiments and assessing the potential response of surface chemical behaviors to global change.

  12. DIRECT DETECTIONS OF YOUNG STARS IN NEARBY ELLIPTICAL GALAXIES

    SciTech Connect

    Ford, H. Alyson; Bregman, Joel N.

    2013-06-20

    Small amounts of star formation in elliptical galaxies are suggested by several results: surprisingly young ages from optical line indices, cooling X-ray gas, and mid-infrared dust emission. Such star formation has previously been difficult to directly detect, but using ultraviolet Hubble Space Telescope Wide Field Camera 3 imaging, we have identified individual young stars and star clusters in four nearby ellipticals. Ongoing star formation is detected in all galaxies, including three ellipticals that have previously exhibited potential signposts of star-forming conditions (NGC 4636, NGC 4697, and NGC 4374), as well as the typical ''red and dead'' NGC 3379. The current star formation in our closest targets, where we are most complete, is between 2.0 and 9.8 Multiplication-Sign 10{sup -5} M{sub Sun} yr{sup -1}. The star formation history was roughly constant from 0.5 to 1.5 Gyr (at (3-5) Multiplication-Sign 10{sup -4} M{sub Sun} yr{sup -1}), but decreased by a factor of several in the past 0.3 Gyr. Most star clusters have a mass between 10{sup 2} and 10{sup 4} M{sub Sun }. The specific star formation rates of {approx}10{sup -16} yr{sup -1} (at the present day) or {approx}10{sup -14} yr{sup -1} (when averaging over the past Gyr) imply that a fraction 10{sup -8} of the stellar mass is younger than 100 Myr and 10{sup -5} is younger than 1 Gyr, quantifying the level of frosting of recent star formation over the otherwise passive stellar population. There is no obvious correlation between either the presence or spatial distribution of postulated star formation indicators and the star formation we detect.

  13. Recoiling supermassive black holes: a search in the nearby universe

    SciTech Connect

    Lena, D.; Robinson, A.; Axon, D. J.; Merritt, D.; Marconi, A.; Capetti, A.; Batcheldor, D.

    2014-11-10

    The coalescence of a binary black hole can be accompanied by a large gravitational recoil due to anisotropic emission of gravitational waves. A recoiling supermassive black hole (SBH) can subsequently undergo long-lived oscillations in the potential well of its host galaxy, suggesting that offset SBHs may be common in the cores of massive ellipticals. We have analyzed Hubble Space Telescope archival images of 14 nearby core ellipticals, finding evidence for small (? 10 pc) displacements between the active galactic nucleus (AGN; the location of the SBH) and the center of the galaxy (the mean photocenter) in 10 of them. Excluding objects that may be affected by large-scale isophotal asymmetries, we consider six galaxies to have detected displacements, including M87, where a displacement was previously reported by Batcheldor et al. In individual objects, these displacements can be attributed to residual gravitational recoil oscillations following a major or minor merger within the last few gigayears. For plausible merger rates, however, there is a high probability of larger displacements than those observed, if SBH coalescence took place in these galaxies. Remarkably, the AGN-photocenter displacements are approximately aligned with the radio source axis in four of the six galaxies with displacements, including three of the four having relatively powerful kiloparsec-scale jets. This suggests intrinsic asymmetries in radio jet power as a possible displacement mechanism, although approximate alignments are also expected for gravitational recoil. Orbital motion in SBH binaries and interactions with massive perturbers can produce the observed displacement amplitudes but do not offer a ready explanation for the alignments.

  14. High Statistics Study of Nearby Type 1a Supernovae. QUEST Camera Short Term

    Office of Scientific and Technical Information (OSTI)

    Maintenance: Final Technical Report (Technical Report) | SciTech Connect High Statistics Study of Nearby Type 1a Supernovae. QUEST Camera Short Term Maintenance: Final Technical Report Citation Details In-Document Search Title: High Statistics Study of Nearby Type 1a Supernovae. QUEST Camera Short Term Maintenance: Final Technical Report The Quest Camera was installed at the Palomar Obervatory in California. The camera was used to carry out a survey of low redshift Type 1a supernovae.The

  15. THE NEARBY, YOUNG, ISOLATED, DUSTY STAR HD 166191

    SciTech Connect

    Schneider, Adam; Song, Inseok; Hufford, Tara; Melis, Carl; Zuckerman, B.; Bessell, Mike; Hinkley, Sasha E-mail: song@physast.uga.edu E-mail: cmelis@ucsd.edu E-mail: bessell@mso.anu.edu.au

    2013-11-01

    We report an in-depth study of the F8-type star HD 166191, identified in an ongoing survey for stars exhibiting infrared emission above their expected photospheres in the Wide-field Infrared Survey Explorer all-sky catalog. The fractional IR luminosity measured from 3.5 to 70 μm is exceptionally high (L{sub IR}/L{sub bol} ∼ 10%). Near-diffraction-limited imaging observations with the T-ReCS Si filter set on the Gemini South telescope and adaptive optics imaging with the NIRC2 Lp filter on the Keck II telescope confirmed that the excess emission coincides with the star. Si-band images show a strong solid-state emission feature at ∼10 μm. Theoretical evolutionary isochrones and optical spectroscopic observations indicate a stellar age in the range 10-100 Myr. The large dust mass seen in HD 166191's terrestrial planet zone is indicative of a recent collision between planetary embryos or massive ongoing collisional grinding associated with planet building.

  16. BROAD Ly{alpha} EMISSION FROM THREE NEARBY BL LACERTAE OBJECTS

    SciTech Connect

    Stocke, John T.; Danforth, Charles W. [CASA, Department of Astrophysical and Planetary Sciences, University of Colorado, 389-UCB, Boulder, CO 80309 (United States); Perlman, Eric S., E-mail: danforth@casa.colorado.edu, E-mail: stocke@casa.colorado.edu, E-mail: eperlman@fit.edu [Florida Institute of Technology, Physics and Space Sciences Department, 150 West University Boulevard, Melbourne, FL 32901 (United States)

    2011-05-10

    We present far-UV HST/COS spectra of four nearby BL Lac objects. BL Lac spectra are dominated by a smooth, power-law continuum which arises in a relativistic jet. However, the spectra are not necessarily featureless; weak, broad- and/or narrow-line emission is sometimes seen in high-quality optical spectra. We present detections of Ly{alpha} emission in HST/COS spectra of Mrk 421 (z = 0.030) and PKS 2005-489 (z = 0.071) as well as an archival HST/GHRS observation of Mrk 501 (z = 0.0337). Archival HST/STIS observations of PKS 2155-304 (z = 0.116) show no Ly{alpha} emission to a very low upper limit. Using the assumption that the broad-line region (BLR) clouds are symmetrically placed around the active galactic nucleus (AGN), we use these measured Ly{alpha} emission features to constrain either the relativistic {Gamma} values for the ionizing continuum produced by the jet (in the ionization-bounded case) or the mass of warm gas (in the density-bounded case). While realistic {Gamma} values can be obtained for all four cases, the values for Mrk 421 and PKS 2155-304 are high enough to suggest that covering factors of BLR clouds of {approx}1%-2% might be required to provide consistency with earlier values of Doppler boosting and viewing angles suggested for this class of BL Lacs. This discrepancy also exists in the case of M 87, where the amount of Doppler boosting in our direction is expected to be minimal, again suggestive of a small covering factor of BLR clouds. If, as these small covering factors might suggest, the assumptions of a density-bounded model could be more correct, then the observed Ly{alpha} luminosities require that BL Lac/FR 1 nuclei possess very little warm gas (10{sup -4} to 10{sup -5} M{sub sun}) as suggested by Guilbert et al. If these clouds are in pressure balance with a hotter ({approx}10{sup 6} K) gas, the BLR contains too little mass to power the AGN by accretion alone.

  17. UCAC4 nearby star survey: A search for our stellar neighbors

    SciTech Connect

    Finch, Charlie T.; Zacharias, Norbert; Subasavage, John P.; Henry, Todd J.; Riedel, Adric R.

    2014-12-01

    We use data from the U.S. Naval Observatory fourth CCD Astrograph Catalog (UCAC4) in combination with photometry from the AAVSO Photometric All-Sky Survey and Two Micron All-Sky Survey to identify stars within 25 pc of the Sun. A sample of nearby stars with accurate trigonometric parallaxes from the Research Consortium On Nearby Stars is used to generate a set of 16 new photometric color–M{sub K{sub s}} relations that provide distance estimates with uncertainties of 15%. This work expands the available suites of well-calibrated photometric distance relations that can be used to identify nearby stellar systems. The distance relations are used with quality cuts to extract an initial sample of stars from the UCAC4 estimated to be within 25 pc. Color, proper motion, and existing literature sources are then used to obtain a clean sample of red dwarfs, while limiting the amount of contamination from background giants, resulting in a sample of 1761 candidate nearby stars within 25 pc. Of these, 339 are new discoveries with no previously known published parallax or distance estimate, primarily with proper motions less than 0.2 arcsec yr{sup −1}. Five stars are estimated to be within 10 pc, with the nearest, TYC 3980 1081 1, with V=10.50 estimated to be at 5.9 pc. That several hundred new stars have been revealed so close to the Sun illustrates once again that there is considerable work yet to be done to map the solar neighborhood and that additional nearby stars are likely still to be discovered.

  18. Featured Topic Pages

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Featured Topic Pages * Renowned scientists, with information about the scientists' R&D results * Significant DOE research disciplines, with R&D results * Manhattan Project, ...

  19. DVU Featured Training & Events ...

    Energy.gov [DOE] (indexed site)

    Featured Training & Events Form Please complete this form in its entirety and email to ... Classroom, Online) 8. Course Location: Training Facility Address, Room City & State : ...

  20. Molten-Caustic-Leaching (Gravimelt) System Integration Project, Phase 2. Topical report for test circuit maintenance, refurbishment, modification, and off-line operation

    SciTech Connect

    Not Available

    1993-03-01

    This is a report of the maintenance, refurbishment, modifications, and off-line circuit component testing of the integrated test circuit of the Molten-Caustic-Leaching (MCL or Gravimelt) process for the desulfurization and demineralization of coal. The project is sponsored by the Pittsburgh Energy Technology Center of the US Department of Energy under Contract No. DE-AC22-86-PC91257.

  1. The mass of the central black hole in the nearby Seyfert galaxy NGC 5273

    SciTech Connect

    Bentz, Misty C.; Horenstein, Daniel; Bazhaw, Craig; Manne-Nicholas, Emily R.; Ou-Yang, Benjamin J.; Anderson, Matthew; Jones, Jeremy; Norris, Ryan P.; Parks, J. Robert; Saylor, Dicy; Teems, Katherine G.; Turner, Clay

    2014-11-20

    We present the results of a reverberation-mapping program targeting NGC 5273, a nearby early-type galaxy with a broad-lined active galactic nucleus (AGN). Over the course of the monitoring program, NGC 5273 showed strong variability that allowed us to measure time delays in the responses of the broad optical recombination lines to changes in the continuum flux. A weighted average of these measurements results in a black hole mass determination of M {sub BH} = (4.7 ± 1.6) × 10{sup 6} M {sub ☉}. An estimate of the size of the black hole sphere of influence in NGC 5273 puts it just at the limit of the resolution achievable with current ground-based large aperture telescopes. NGC 5273 is therefore an important future target for a black hole mass determination from stellar dynamical modeling, especially because it is the only nearby early-type galaxy hosting an AGN with a reverberation-based mass, allowing the best comparison for the masses determined from these two techniques.

  2. Heat loads to divertor nearby components from secondary radiation evolved during plasma instabilities

    SciTech Connect

    Sizyuk, V. Hassanein, A.

    2015-01-15

    A fundamental issue in tokamak operation related to power exhaust during plasma instabilities is the understanding of heat and particle transport from the core plasma into the scrape-off layer and to plasma-facing materials. During abnormal and disruptive operation in tokamaks, radiation transport processes play a critical role in divertor/edge-generated plasma dynamics and are very important in determining overall lifetimes of the divertor and nearby components. This is equivalent to or greater than the effect of the direct impact of escaped core plasma on the divertor plate. We have developed and implemented comprehensive enhanced physical and numerical models in the upgraded HEIGHTS package for simulating detailed photon and particle transport in the evolved edge plasma during various instabilities. The paper describes details of a newly developed 3D Monte Carlo radiation transport model, including optimization methods of generated plasma opacities in the full range of expected photon spectra. Response of the ITER divertor's nearby surfaces due to radiation from the divertor-developed plasma was simulated by using actual full 3D reactor design and magnetic configurations. We analyzed in detail the radiation emission spectra and compared the emission of both carbon and tungsten as divertor plate materials. The integrated 3D simulation predicted unexpectedly high damage risk to the open stainless steel legs of the dome structure in the current ITER design from the intense radiation during a disruption on the tungsten divertor plate.

  3. Hopper Featured Announcements

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Announcements Hopper Featured Announcements Hopper OS upgrade and new SW set to default next Wed, Feb 27 February 21, 2013 by Helen He | 0 Comments 1) There will be a scheduled...

  4. Hopper Featured Announcements

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    April 2012 Cluster Compatibility Mode is now available on Hopper April 10, 2012 We are pleased to announce a new feature on Hopper, Cray Cluster Compatibility Mode (CCM) which...

  5. 2013 Feature Stories | NREL

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    2013 Feature Stories The following feature stories take an in-depth, behind-the-scenes look at how NREL is advancing energy efficiency and renewable energy technologies. December 2013 New Test Facility to Improve Wind Turbines New Test Facility to Improve Wind Turbines Five-megawatt dynamometer will accelerate the development of next-generation wind energy technologies. Bright Ideas Chase Investor Dollars at Forum Bright Ideas Chase Investor Dollars at Forum Annual Industry Growth Forum

  6. Community Feature Stories

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Community Feature Stories Community Feature Stories Our good neighbor pledge: to contribute to quality of life in Northern New Mexico through economic development, excellence in education, and active employee engagement in our communities. Northern New Mexico Micro Grape Growers Association Grape Growers Association enlivens agriculture Growers association unites small parcels of land, enlivens production, protects water rights for Northern New Mexico agriculturists. - 8/6/12 Jacob Leyba,

  7. Feature Characterization Library

    Energy Science and Technology Software Center

    2006-08-03

    FCLib is a data analysis toolkit constructed to meet the needs of data discovery in large-scale, spatio-temporal data such as finite element simulation data. FCLib is a C library toolkit of building blocks that can be assembled into complex analyses. Important features of FCLib include the following: (1) Support of feature-based analysis, (2) minimization of low-oevel processing, (3) ease of use, and (4) applicable to the wide variety of science domains.

  8. Correlation of the highest energy cosmic rays with nearby extragalactic objects

    SciTech Connect

    Abraham, J.; Abreu, P.; Aglietta, M.; Aguirre, C.; Allard, D.; Allekotte, I.; Allen, J.; Allison, P.; Alvarez, C.; Alvarez-Muniz, J.; Ambrosio, M.; /Balseiro Inst., San Carlos de Bariloche /Buenos Aires, CONICET /CNEA, Buenos Aires /Pierre Auger Observ. /La Plata U. /Natl. Tech. U., San Rafael /Adelaide U. /Catholic U. of Bolivia, La Paz /Bolivia U. /Rio de Janeiro, CBPF /Sao Paulo U.

    2007-11-01

    Using data collected at the Pierre Auger Observatory during the past 3.7 years, we demonstrate that there is a correlation between the arrival directions of cosmic rays with energy above {approx} 6 x 10{sup 19} eV and the positions of active galactic nuclei (AGN) lying within {approx} 75 Mpc. We reject the hypothesis of an isotropic distribution of these cosmic rays at over 99% confidence level from a prescribed a priori test. The correlation we observe is compatible with the hypothesis that the highest energy particles originate from nearby extragalactic sources whose flux has not been significantly reduced by interaction with the cosmic background radiation. AGN or objects having a similar spatial distribution are possible sources.

  9. ACR-1000 Passive Features

    SciTech Connect

    Lekakh, Boris; Hau, Ken; Ford, Steven

    2006-07-01

    The Advanced CANDU Reactor{sup TM} (ACR{sup TM}) is a Generation III+ pressure tube type reactor using light water coolant and heavy water moderator. The ACR-1000 reactor design is an evolutionary extension of the proven CANDU reactor design. The ACR-1000 incorporates multiple and diverse passive systems for accident mitigation. Where necessary, one or more features that are passive in nature have been included for mitigation of any postulated accident event. This paper describes how the use of passive design elements complements active features enhances reliability and improves safety margins. (authors)

  10. Astrophysical tests of modified gravity: Constraints from distance indicators in the nearby universe

    SciTech Connect

    Jain, Bhuvnesh; Vikram, Vinu; Sakstein, Jeremy

    2013-12-10

    We use distance measurements in the nearby universe to carry out new tests of gravity, surpassing other astrophysical tests by over two orders of magnitude for chameleon theories. The three nearby distance indicatorscepheids, tip of the red giant branch (TRGB) stars, and water masersoperate in gravitational fields of widely different strengths. This enables tests of scalar-tensor gravity theories because they are screened from enhanced forces to different extents. Inferred distances from cepheids and TRGB stars are altered (in opposite directions) over a range of chameleon gravity theory parameters well below the sensitivity of cosmological probes. Using published data, we have compared cepheid and TRGB distances in a sample of unscreened dwarf galaxies within 10 Mpc. We use a comparable set of screened galaxies as a control sample. We find no evidence for the order unity force enhancements expected in these theories. Using a two-parameter description of the models (the coupling strength and background field value), we obtain constraints on both the chameleon and symmetron screening scenarios. In particular we show that f(R) models with background field values f {sub R0} above 5 10{sup 7} are ruled out at the 95% confidence level. We also compare TRGB and maser distances to the galaxy NGC 4258 as a second test for larger field values. While there are several approximations and caveats in our study, our analysis demonstrates the power of gravity tests in the local universe. We discuss the prospects for additional improved tests with future observations.

  11. AN INFRARED CENSUS OF DUST IN NEARBY GALAXIES WITH SPITZER (DUSTINGS). I. OVERVIEW

    SciTech Connect

    Boyer, Martha L.; Sonneborn, George; McQuinn, Kristen B. W.; Gehrz, Robert D.; Skillman, Evan; Barmby, Pauline; Bonanos, Alceste Z.; Gordon, Karl D.; Meixner, Margaret; Groenewegen, M. A. T.; Lagadec, Eric; Lennon, Daniel; Marengo, Massimo; Sloan, G. C.; Van Loon, Jacco Th.; Zijlstra, Albert

    2015-01-01

    Nearby resolved dwarf galaxies provide excellent opportunities for studying the dust-producing late stages of stellar evolution over a wide range of metallicity (–2.7 ≲ [Fe/H] ≲ –1.0). Here, we describe DUSTiNGS (DUST in Nearby Galaxies with Spitzer): a 3.6 and 4.5 μm post-cryogen Spitzer Space Telescope imaging survey of 50 dwarf galaxies within 1.5 Mpc that is designed to identify dust-producing asymptotic giant branch (AGB) stars and massive stars. The survey includes 37 dwarf spheroidal, 8 dwarf irregular, and 5 transition-type galaxies. This near-complete sample allows for the building of statistics on these rare phases of stellar evolution over the full metallicity range. The photometry is >75% complete at the tip of the red giant branch for all targeted galaxies, with the exception of the crowded inner regions of IC 10, NGC 185, and NGC 147. This photometric depth ensures that the majority of the dust-producing stars, including the thermally pulsing AGB stars, are detected in each galaxy. The images map each galaxy to at least twice the half-light radius to ensure that the entire evolved star population is included and to facilitate the statistical subtraction of background and foreground contamination, which is severe at these wavelengths. In this overview, we describe the survey, the data products, and preliminary results. We show evidence for the presence of dust-producing AGB stars in eight of the targeted galaxies, with metallicities as low as [Fe/H] = –1.9, suggesting that dust production occurs even at low metallicity.

  12. SUBSTELLAR OBJECTS IN NEARBY YOUNG CLUSTERS (SONYC). III. CHAMAELEON-I

    SciTech Connect

    Muzic, Koraljka; Fissel, Laura; Jayawardhana, Ray; Scholz, Alexander; Geers, Vincent

    2011-05-10

    SONYC-Substellar Objects in Nearby Young Clusters-is a survey program to investigate the frequency and properties of substellar objects with masses down to a few times that of Jupiter in nearby star-forming regions. In this third paper, we present our recent results in the Chamaeleon-I star-forming region. We have carried out deep optical and near-infrared imaging in four bands (I, z, J, K{sub S} ) using VIMOS on the European Southern Observatory Very Large Telescope (VLT) and SOFI on the New Technology Telescope, and combined our data with mid-infrared data from the Spitzer Space Telescope. The survey covers {approx}0.25 deg{sup 2} on the sky and reaches completeness limits of 23.0 in the I band, 18.3 in the J band, and 16.7 in the K{sub S} band. Follow-up spectroscopy of the candidates selected from the optical photometry (I {approx}< 21) was carried out using the multi-object spectrograph VIMOS on the VLT. We identify 13 objects consistent with M spectral types, 11 of which are previously known M dwarfs with confirmed membership in the cluster. The two newly reported objects have effective temperatures above the substellar limit. We also present two new candidate members of Chamaeleon-I, selected from our JK photometry combined with the Spitzer data. Based on the results of our survey, we estimate that the number of missing very low mass members down to {approx}0.008 M{sub sun} and A{sub V} {<=} 5 is {<=}7, i.e., {<=}3% of the total cluster population according to the current census.

  13. The 60-month all-sky BAT Survey of AGN and the Anisotropy of Nearby AGN

    SciTech Connect

    Ajello, M.; Alexander, D.M.; Greiner, J.; Madejski, G.M.; Gehrels, N.; Burlon, D.; /Garching, Max Planck Inst., MPE

    2012-04-02

    Surveys above 10 keV represent one of the the best resources to provide an unbiased census of the population of Active Galactic Nuclei (AGN). We present the results of 60 months of observation of the hard X-ray sky with Swift/BAT. In this timeframe, BAT detected (in the 15-55 keV band) 720 sources in an all-sky survey of which 428 are associated with AGN, most of which are nearby. Our sample has negligible incompleteness and statistics a factor of {approx}2 larger over similarly complete sets of AGN. Our sample contains (at least) 15 bona-fide Compton-thick AGN and 3 likely candidates. Compton-thick AGN represent a {approx}5% of AGN samples detected above 15 keV. We use the BAT dataset to refine the determination of the LogN-LogS of AGN which is extremely important, now that NuSTAR prepares for launch, towards assessing the AGN contribution to the cosmic X-ray background. We show that the LogN-LogS of AGN selected above 10 keV is now established to a {approx}10% precision. We derive the luminosity function of Compton-thick AGN and measure a space density of 7.9{sub -2.9}{sup +4.1} x 10{sup -5} Mpc{sup -3} for objects with a de-absorbed luminosity larger than 2 x 10{sup 42} erg s{sup -1}. As the BAT AGN are all mostly local, they allow us to investigate the spatial distribution of AGN in the nearby Universe regardless of absorption. We find concentrations of AGN that coincide spatially with the largest congregations of matter in the local ({le} 85 Mpc) Universe. There is some evidence that the fraction of Seyfert 2 objects is larger than average in the direction of these dense regions.

  14. Nearby Supernova Factory Observations of SN 2005gj: Another TypeIa Supernova in a Massive Circumstellar Envelope

    SciTech Connect

    Aldering, G.; Antilogus, P.; Bailey, S.; Baltay, C.; Bauer, A.; Blanc, N.; Bongard, S.; Copin, Y.; Gangler, E.; Gilles, S.; Kessler, R.; Kocevski, D.; Lee, B.C.; Loken, S.; Nugent, P.; Pain, R.; Pecontal, E.; Pereira, R.; Perlmutter, S.; Rabinowitz, D.; Rigaudier, G.; Scalzo, R.; Smadja, G.; Thomas, R.C.; Wang, L.; Weaver, B.A.; Rabinowitz, D.; Bauer, A.

    2006-06-01

    We report the independent discovery and follow-up observations of supernova 2005gj by the Nearby Supernova Factory. This is the second confirmed case of a ''hybrid'' Type Ia/IIn supernova, which like the prototype SN 2002ic, we interpret as the explosion of a white dwarf interacting with a circumstellar medium. Our early-phase photometry of SN 2005gj shows that the strength of the interaction between the supernova ejecta and circumstellar material is much stronger than for SN 2002ic. Our .rst spectrum shows a hot continuum with broad and narrow H{alpha} emission. Later spectra, spanning over 4 months from outburst, show clear Type Ia features combined with broad and narrow H{gamma}, H{beta},H{alpha} and He I {lambda}{lambda}5876,7065 in emission. At higher resolution, P Cygni profiles are apparent. Surprisingly, we also observe an inverted P Cygni profile for [O III] {lambda}5007. We find that the lightcurve and measured velocity of the unshocked circumstellar material imply mass loss as recently as 8 years ago. This is in contrast to SN 2002ic, for which an inner cavity in the circumstellar material was inferred. Within the context of the thin-shell approximation, the early lightcurve is well-described by a flat radial density profile for the circumstellar material. However, our decomposition of the spectra into Type Ia and shock emission components allows for little obscuration of the supernova, suggesting an aspherical or clumpy distribution for the circumstellar material. We suggest that the emission line velocity profiles arise from electron scattering rather than the kinematics of the shock. This is supported by the inferred high densities, and the lack of evidence for evolution in the line widths. Ground- and space-based photometry, and Keck spectroscopy, of the host galaxy are used to ascertain that the host galaxy has low metallicity (Z/Z{sub {circle_dot}} < 0.3; 95% confidence) and that this galaxy is undergoing a significant star formation event that

  15. Intrinsic Feature Motion Tracking

    Energy Science and Technology Software Center

    2013-03-19

    Subject motion during 3D medical scanning can cause blurring and artifacts in the 3D images resulting in either rescans or poor diagnosis. Anesthesia or physical restraints may be used to eliminate motion but are undesirable and can affect results. This software measures the six degree of freedom 3D motion of the subject during the scan under a rigidity assumption using only the intrinsic features present on the subject area being monitored. This movement over timemore » can then be used to correct the scan data removing the blur and artifacts. The software acquires images from external cameras or images stored on disk for processing. The images are from two or three calibrated cameras in a stereo arrangement. Algorithms extract and track the features over time and calculate position and orientation changes relative to an initial position. Output is the 3D position and orientation change measured at each image.« less

  16. Hopper Featured Announcements

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Announcements Hopper Featured Announcements Hopper OS upgrade and new SW set to default next Wed, Feb 27 February 21, 2013 by Helen He 1) There will be a scheduled hardware and software maintenance for Hopper next Wednesday, February 27, from 7 am to 7 pm Pacific time. This is a major OS upgrade. Most applications are highly recommended to recompile (or at least relink) after the maintenance. C++ and PGAS applications are recommended to recompile and relink. Please plan your work accordingly and

  17. Hopper Featured Announcements

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    April 2012 Cluster Compatibility Mode is now available on Hopper April 10, 2012 We are pleased to announce a new feature on Hopper, Cray Cluster Compatibility Mode (CCM) which allows applications that previously could only run on Carver to run on Hopper. Cluster Compatibility Mode (CCM) is a Cray software solution that provides services needed to run most cluster-based independent software vendor (ISV) applications on the Cray XE6. It supports the standard Linux services, such as ssh, rsh, nscd,

  18. Discretization error estimation and exact solution generation using the method of nearby problems.

    SciTech Connect

    Sinclair, Andrew J.; Raju, Anil; Kurzen, Matthew J.; Roy, Christopher John; Phillips, Tyrone S.

    2011-10-01

    The Method of Nearby Problems (MNP), a form of defect correction, is examined as a method for generating exact solutions to partial differential equations and as a discretization error estimator. For generating exact solutions, four-dimensional spline fitting procedures were developed and implemented into a MATLAB code for generating spline fits on structured domains with arbitrary levels of continuity between spline zones. For discretization error estimation, MNP/defect correction only requires a single additional numerical solution on the same grid (as compared to Richardson extrapolation which requires additional numerical solutions on systematically-refined grids). When used for error estimation, it was found that continuity between spline zones was not required. A number of cases were examined including 1D and 2D Burgers equation, the 2D compressible Euler equations, and the 2D incompressible Navier-Stokes equations. The discretization error estimation results compared favorably to Richardson extrapolation and had the advantage of only requiring a single grid to be generated.

  19. Characterizing mid-ultraviolet to optical light curves of nearby type IIn supernovae

    DOE PAGES [OSTI]

    de la Rosa, Janie; Roming, Pete; Pritchard, Tyler; Fryer, Chris

    2016-03-21

    Here, we present early mid-ultraviolet and optical observations of Type IIn supernovae (SNe IIn) observed from 2007 to 2013. Our results focus on the properties of UV light curves: peak absolute magnitudes, temporal decay, and color evolution. During early times, this sample demonstrates that UV light decays faster than optical, and each event transitions from a predominantly UV-bright phase to an optically bright phase. In order to understand early UV behavior, we generate and analyze the sample's blackbody luminosity, temperature, and radius as the SN ejecta expand and cool. Since most of our observations were detected post maximum luminosity, wemore » introduce a method for estimating the date of peak magnitude. When our observations are compared based on filter, we find that even though these SNe IIn vary in peak magnitudes, there are similarities in UV decay rates. We use a simple semi-analytical SN model in order to understand the effects of the explosion environment on our UV observations. Understanding the UV characteristics of nearby SNe IIn during an early phase can provide valuable information about the environment surrounding these explosions, leading us to evaluating the diversity of observational properties in this subclass.« less

  20. Imaging survey of subsystems in secondary components to nearby southern dwarfs

    SciTech Connect

    Tokovinin, Andrei

    2014-10-01

    To improve the statistics of hierarchical multiplicity, secondary components of wide nearby binaries with solar-type primaries were surveyed at the SOAR telescope for evaluating the frequency of subsystems. Images of 17 faint secondaries were obtained with the SOAR Adaptive Module that improved the seeing; one new 0.''2 binary was detected. For all targets, photometry in the g', i', z' bands is given. Another 46 secondaries were observed by speckle interferometry, resolving 7 close subsystems. Adding literature data, the binarity of 95 secondary components is evaluated. We found that the detection-corrected frequency of secondary subsystems with periods in the well-surveyed range from 10{sup 3} to 10{sup 5} days is 0.21 ± 0.06—same as the normal frequency of such binaries among solar-type stars, 0.18. This indicates that wide binaries are unlikely to be produced by dynamical evolution of N-body systems, but are rather formed by fragmentation.

  1. RUPRECHT 147: THE OLDEST NEARBY OPEN CLUSTER AS A NEW BENCHMARK FOR STELLAR ASTROPHYSICS

    SciTech Connect

    Curtis, Jason L.; Wright, Jason T.; Wolfgang, Angie; Brewer, John M.; Johnson, John Asher

    2013-05-15

    Ruprecht 147 is a hitherto unappreciated open cluster that holds great promise as a standard in fundamental stellar astrophysics. We have conducted a radial velocity survey of astrometric candidates with Lick, Palomar, and MMT observatories and have identified over 100 members, including 5 blue stragglers, 11 red giants, and 5 double-lined spectroscopic binaries (SB2s). We estimate the cluster metallicity from spectroscopic analysis, using Spectroscopy Made Easy (SME), and find it to be [M/H] = +0.07 {+-} 0.03. We have obtained deep CFHT/MegaCam g'r'i'z' photometry and fit Padova isochrones to the (g' - i') and Two Micron All Sky Survey (J - K{sub S} ) color-magnitude diagrams, using the {tau}{sup 2} maximum-likelihood procedure of Naylor, and an alternative method using two-dimensional cross-correlations developed in this work. We find best fits for Padova isochrones at age t = 2.5 {+-} 0.25 Gyr, m - M = 7.35 {+-} 0.1, and A{sub V} = 0.25 {+-} 0.05, with additional uncertainty from the unresolved binary population and possibility of differential extinction across this large cluster. The inferred age is heavily dependent on our choice of stellar evolution model: fitting Dartmouth and PARSEC models yield age parameters of 3 Gyr and 3.25 Gyr, respectively. At {approx}300 pc and {approx}3 Gyr, Ruprecht 147 is by far the oldest nearby star cluster.

  2. The abundance properties of nearby late-type galaxies. I. The data

    SciTech Connect

    Pilyugin, L. S.; Grebel, E. K.; Kniazev, A. Y. E-mail: grebel@ari.uni-heidelberg.de

    2014-06-01

    We investigate the oxygen and nitrogen abundance distributions across the optical disks of 130 nearby late-type galaxies using around 3740 published spectra of H II regions. We use these data in order to provide homogeneous abundance determinations for all objects in the sample, including H II regions in which not all of the usual diagnostic lines were measured. Examining the relation between N and O abundances in these galaxies we find that the abundances in their centers and at their isophotal R {sub 25} disk radii follow the same relation. The variation in N/H at a given O/H is around 0.3 dex. We suggest that the observed spread in N/H may be partly caused by the time delay between N and O enrichment and the different star formation histories in galaxies of different morphological types and dimensions. We study the correlations between the abundance properties (central O and N abundances, radial O and N gradients) of a galaxy and its morphological type and dimension.

  3. HERSCHEL AND SPITZER OBSERVATIONS OF SLOWLY ROTATING, NEARBY ISOLATED NEUTRON STARS

    SciTech Connect

    Posselt, B.; Pavlov, G. G.; Popov, S.; Wachter, S.

    2014-11-01

    Supernova fallback disks around neutron stars have been suspected to influence the evolution of the diverse neutron star populations. Slowly rotating neutron stars are the most promising places to find such disks. Searching for the cold and warm debris of old fallback disks, we carried out Herschel PACS (70 μm, 160 mu m) and Spitzer IRAC (3.6 μm, 4.5 μm) observations of eight slowly rotating (P ≈ 3-11 s) nearby (<1 kpc) isolated neutron stars. Herschel detected 160 μm emission (>5σ) at locations consistent with the positions of the neutron stars RX J0806.4-4123 and RX J2143.0+0654. No other significant infrared emission was detected from the eight neutron stars. We estimate probabilities of 63%, 33%, and 3% that, respectively, none, one, or both Herschel PACS 160 μm detections are unrelated excess sources due to background source confusion or an interstellar cirrus. If the 160 μm emission is indeed related to cold (10-22 K) dust around the neutron stars, this dust is absorbing and re-emitting ∼10% to ∼20% of the neutron stars' X-rays. Such high efficiencies would be at least three orders of magnitude larger than the efficiencies of debris disks around nondegenerate stars. While thin dusty disks around the neutron stars can be excluded as counterparts of the 160 μm emission, dusty asteroid belts constitute a viable option.

  4. Stellar and gaseous nuclear disks observed in nearby (U)LIRGs

    SciTech Connect

    Medling, Anne M.; U, Vivian; Guedes, Javiera; Max, Claire E.; Holden, Bradford; Mayer, Lucio; Roškar, Rok; Armus, Lee; Sanders, David E-mail: max@ucolick.org

    2014-03-20

    We present near-infrared integral field spectroscopy of the central kiloparsec of 17 nearby luminous and ultra-luminous infrared galaxies undergoing major mergers. These observations were taken with OSIRIS assisted by the Keck I and II Adaptive Optics systems, providing spatial resolutions of a few tens of parsecs. The resulting kinematic maps reveal gas disks in at least 16 out of 19 nuclei and stellar disks in 11 out of 11 nuclei observed in these galaxy merger systems. In our late-stages mergers, these disks are young (stellar ages <30 Myr) and likely formed as gas disks that became unstable to star formation during the merger. On average, these disks have effective radii of a few hundred parsecs, masses between 10{sup 8} and 10{sup 10} M {sub ☉}, and v/σ between 1 and 5. These disks are similar to those created in high-resolution hydrodynamical simulations of gas-rich galaxy mergers, and favor short coalescence times for binary black holes. The few galaxies in our sample in earlier stages of mergers have disks that are larger (r {sub eff} ∼ 200-1800 pc) and are likely remnants of the galactic disks that have not yet been completely disrupted by the merger.

  5. Alma observations of nearby luminous infrared galaxies with various agn energetic contributions using dense gas tracers

    SciTech Connect

    Imanishi, Masatoshi; Nakanishi, Kouichiro

    2014-07-01

    We present the results of our ALMA Cycle 0 observations, using HCN/HCO{sup +}/HNC J = 4-3 lines, of six nearby luminous infrared galaxies with various energetic contributions from active galactic nuclei (AGNs) estimated from previous infrared spectroscopy. These lines are very effective for probing the physical properties of high-density molecular gas around the hidden energy sources in the nuclear regions of these galaxies. We find that HCN to HCO{sup +} J = 4-3 flux ratios tend to be higher in AGN-important galaxies than in starburst-dominated regions, as was seen at the J = 1-0 transition, while there is no clear difference in the HCN-to-HNC J = 4-3 flux ratios among observed sources. A galaxy with a starburst-type infrared spectral shape and very large molecular line widths shows a high HCN-to-HCO{sup +} J = 4-3 flux ratio, which could be due to turbulence-induced heating. We propose that enhanced HCN J = 4-3 emission relative to HCO{sup +} J = 4-3 could be used to detect more energetic activity than normal starbursts, including deeply buried AGNs, in dusty galaxy populations.

  6. Antideuteron production in {upsilon}(nS) decays and the nearby continuum

    SciTech Connect

    Asner, D. M.; Edwards, K. W.; Briere, R. A.; Chen, J.; Ferguson, T.; Tatishvili, G.; Vogel, H.; Watkins, M. E.; Rosner, J. L.; Adam, N. E.; Alexander, J. P.; Berkelman, K.; Cassel, D. G.; Duboscq, J. E.; Ecklund, K. M.; Ehrlich, R.; Fields, L.; Galik, R. S.; Gibbons, L.; Gray, R.

    2007-01-01

    Using CLEO data, we study the production of the antideuteron, d, in {upsilon}(nS) resonance decays and the nearby continuum. The branching ratios obtained are B{sup dir}({upsilon}(1S){yields}dX)=(3.36{+-}0.23{+-}0.25)x10{sup -5}, B({upsilon}(1S){yields}dX)=(2.86{+-}0.19{+-}0.21)x10{sup -5}, and B({upsilon}(2S){yields}dX)=(3.37{+-}0.50{+-}0.25)x10{sup -5}, where the 'dir' superscript indicates that decays produced via reannihilation of the bb pair to a {gamma}* are removed from both the signal and the normalizing number of {upsilon}(1S) decays in order to isolate direct decays of the {upsilon}(1S) to ggg, gg{gamma}. Upper limits at 90% C.L. are given for B({upsilon}(4S){yields}dX)<1.3x10{sup -5}, and continuum production {sigma}(e{sup +}e{sup -}{yields}dX)<0.031 pb. The {upsilon}(2S) data is also used to extract a limit on {chi}{sub bJ}{yields}dX. The results indicate enhanced deuteron production in ggg, gg{gamma} hadronization compared to {gamma}*{yields}qq. Baryon number compensation is also investigated with the large {upsilon}(1S){yields}dX sample.

  7. Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter

    SciTech Connect

    Abreu, P.; Aglietta, M.; Ahn, E.J.; Allard, D.; Allekotte, I.; Allen, J.; Alvarez Castillo, J.; Alvarez-Muniz, J.; Ambrosio, M.; Aminaei, A.; Anchordoqui, L.; /Wisconsin U., Milwaukee /Lisbon, IST

    2010-06-01

    Data collected by the Pierre Auger Observatory through 31 August 2007 showed evidence for anisotropy in the arrival directions of cosmic rays above the Greisen-Zatsepin-Kuzmin energy threshold, 6 x 10{sup 19} eV. The anisotropy was measured by the fraction of arrival directions that are less than 3.1{sup o} from the position of an active galactic nucleus within 75 Mpc (using the Veron-Cetty and Veron 12th catalog). An updated measurement of this fraction is reported here using the arrival directions of cosmic rays recorded above the same energy threshold through 31 December 2009. The number of arrival directions has increased from 27 to 69, allowing a more precise measurement. The correlating fraction is (38{sub -6}{sup +7})%, compared with 21% expected for isotropic cosmic rays. This is down from the early estimate of (69{sub -13}{sup +11})%. The enlarged set of arrival directions is examined also in relation to other populations of nearby extragalactic objects: galaxies in the 2 Microns All Sky Survey and active galactic nuclei detected in hard X-rays by the Swift Burst Alert Telescope. A celestial region around the position of the radiogalaxy Cen A has the largest excess of arrival directions relative to isotropic expectations. The 2-point autocorrelation function is shown for the enlarged set of arrival directions and compared to the isotropic expectation.

  8. qFeature

    Energy Science and Technology Software Center

    2015-09-14

    This package contains statistical routines for extracting features from multivariate time-series data which can then be used for subsequent multivariate statistical analysis to identify patterns and anomalous behavior. It calculates local linear or quadratic regression model fits to moving windows for each series and then summarizes the model coefficients across user-defined time intervals for each series. These methods are domain agnostic—but they have been successfully applied to a variety of domains, including commercial aviation andmore » electric power grid data.« less

  9. qFeature

    SciTech Connect

    2015-09-14

    This package contains statistical routines for extracting features from multivariate time-series data which can then be used for subsequent multivariate statistical analysis to identify patterns and anomalous behavior. It calculates local linear or quadratic regression model fits to moving windows for each series and then summarizes the model coefficients across user-defined time intervals for each series. These methods are domain agnostic?but they have been successfully applied to a variety of domains, including commercial aviation and electric power grid data.

  10. 2007 Feature Stories | NREL

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    List of Tables Main Report | Methodology | FAQ | List of Tables CBECS 2007 - Release date: August 17, 2012 Table H1: Structural and Geographical Information for Large Hospitals Table H2: Fuels and End Uses in Large Hospitals Table H3: End Use Equipment in Large Hospitals Table H4: Lighting and Window Features in Large Hospitals Table H5: Major Fuels Usage for Large Hospitals Table H6: Electricity Usage for Large Hospitals Table H7: Natural Gas Usage for Large Hospitals Table H8: Water

  11. Upcoming Features - VOLTTRON 2016

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    4.0 Features CRAIG ALLWARDT August 11, 2016 1 Pacific Northwest National Laboratory VOLTTRON TM 2016 PNNL-SA-119832 Motivations ► 3.0 improved security and flexibility ■ Usability and scalability paid a price ► Improve usability of instance registration and management ► Improve configuration of platform for remote access ► Make documentation more accessible and more in line with current state of code ► Improve the process of validating 3 rd party agents. ► Meet the requirements of

  12. Recursive Feature Extraction in Graphs

    Energy Science and Technology Software Center

    2014-08-14

    ReFeX extracts recursive topological features from graph data. The input is a graph as a csv file and the output is a csv file containing feature values for each node in the graph. The features are based on topological counts in the neighborhoods of each nodes, as well as recursive summaries of neighbors' features.

  13. Wide cool and ultracool companions to nearby stars from Pan-STARRS 1

    SciTech Connect

    Deacon, Niall R.; Liu, Michael C.; Magnier, Eugene A.; Aller, Kimberly M.; Best, William M. J.; Bowler, Brendan P.; Burgett, William S.; Chambers, Kenneth C.; Flewelling, H.; Kaiser, Nick; Kudritzki, Rolf-Peter; Morgan, Jeff S.; Tonry, John L.; Dupuy, Trent; Mann, Andrew W.; Redstone, Joshua A.; Draper, Peter W.; Metcalfe, Nigel; Hodapp, Klaus W.; Price, Paul A.; and others

    2014-09-10

    We present the discovery of 57 wide (>5'') separation, low-mass (stellar and substellar) companions to stars in the solar neighborhood identified from Pan-STARRS 1 (PS1) data and the spectral classification of 31 previously known companions. Our companions represent a selective subsample of promising candidates and span a range in spectral type of K7-L9 with the addition of one DA white dwarf. These were identified primarily from a dedicated common proper motion search around nearby stars, along with a few as serendipitous discoveries from our Pan-STARRS 1 brown dwarf search. Our discoveries include 23 new L dwarf companions and one known L dwarf not previously identified as a companion. The primary stars around which we searched for companions come from a list of bright stars with well-measured parallaxes and large proper motions from the Hipparcos catalog (8583 stars, mostly A-K dwarfs) and fainter stars from other proper motion catalogs (79170 stars, mostly M dwarfs). We examine the likelihood that our companions are chance alignments between unrelated stars and conclude that this is unlikely for the majority of the objects that we have followed-up spectroscopically. We also examine the entire population of ultracool (>M7) dwarf companions and conclude that while some are loosely bound, most are unlikely to be disrupted over the course of ?10 Gyr. Our search increases the number of ultracool M dwarf companions wider than 300 AU by 88% and increases the number of L dwarf companions in the same separation range by 82%. Finally, we resolve our new L dwarf companion to HIP 6407 into a tight (0.''13, 7.4 AU) L1+T3 binary, making the system a hierarchical triple. Our search for these key benchmarks against which brown dwarf and exoplanet atmosphere models are tested has yielded the largest number of discoveries to date.

  14. A CORRELATION BETWEEN SURFACE DENSITIES OF YOUNG STELLAR OBJECTS AND GAS IN EIGHT NEARBY MOLECULAR CLOUDS

    SciTech Connect

    Gutermuth, R. A.; Pipher, J. L.; Megeath, S. T.; Allen, T. S.; Myers, P. C.; Allen, L. E.

    2011-10-01

    We report the discovery and characterization of a power-law correlation between the local surface densities of Spitzer-identified, dusty young stellar objects (YSOs) and the column density of gas (as traced by near-IR extinction) in eight molecular clouds within 1 kpc and with 100 or more known YSOs. This correlation, which appears in data smoothed over size scales of {approx}1 pc, varies in quality from cloud to cloud; those clouds with tight correlations, MonR2 and Ophiuchus, are fit with power laws of slope 2.67 and 1.87, respectively. The spread in the correlation is attributed primarily to local gas disruption by stars that formed there or to the presence of very young subregions at the onset of star formation. We explore the ratio of the number of Class II to Class I sources, a proxy for the star formation age of a region, as a function of gas column density; this analysis reveals a declining Class II to Class I ratio with increasing column density. We show that the observed star-gas correlation is consistent with a star formation law where the star formation rate per area varies with the gas column density squared. We also propose a simple picture of thermal fragmentation of dense gas in an isothermal, self-gravitating layer as an explanation for the power law. Finally, we briefly compare the star-gas correlation and its implied star formation law with other recent proposed of star formation laws at similar and larger size scales from nearby star-forming regions.

  15. DISCOVERY OF FIVE CANDIDATE ANALOGS FOR η CARINAE IN NEARBY GALAXIES

    SciTech Connect

    Khan, Rubab; Adams, Scott M.; Stanek, K. Z.; Kochanek, C. S.; and others

    2015-12-20

    The late-stage evolution of very massive stars such as η Carinae may be dominated by episodic mass ejections that may later lead to Type II superluminous supernova (SLSN-II; e.g., SN 2006gy). However, as long as η Car is one of a kind, it is nearly impossible to quantitatively evaluate these possibilities. Here, we announce the discovery of five objects in the nearby (∼4–8 Mpc) massive star-forming galaxies M51, M83, M101, and NGC 6946 that have optical through mid-infrared (mid-IR) photometric properties consistent with the hitherto unique η Car. The Spitzer mid-IR spectral energy distributions of these L{sub bol} ≃ 3–8 × 10{sup 6} L{sub ⊙} objects rise steeply in the 3.6–8 μm bands and then turn over between 8 and 24 μm, indicating the presence of warm (∼400–600 K) circumstellar dust. Their optical counterparts in HST images are ∼1.5–2 dex fainter than their mid-IR peaks and require the presence of ∼5–10 M{sub ⊙} of obscuring material. Our finding implies that the rate of η Car–like events is a fraction f = 0.094 (0.040 < f < 0.21 at 90% confidence) of the core-collapse supernova (ccSN) rate. If there is only one eruption mechanism and Type II superluminous supernovae are due to ccSNe occurring inside these dense shells, then the ejection mechanism is likely associated with the onset of carbon burning (∼10{sup 3}–10{sup 4} years), which is also consistent with the apparent ages of massive Galactic shells.

  16. FINDING {eta} CAR ANALOGS IN NEARBY GALAXIES USING SPITZER. I. CANDIDATE SELECTION

    SciTech Connect

    Khan, Rubab; Stanek, K. Z.; Kochanek, C. S. E-mail: kstanek@astronomy.ohio-state.edu

    2013-04-10

    The late-stage evolution of the most massive stars such as {eta} Carinae is controlled by the effects of mass loss, which may be dominated by poorly understood eruptive mass ejections. Understanding this population is challenging because no true analogs of {eta} Car have been clearly identified in the Milky Way or other galaxies. We utilize Spitzer IRAC images of seven nearby ({approx}< 4 Mpc) galaxies to search for such analogs. We find 34 candidates with a flat or rising mid-IR spectral energy distributions toward longer mid-infrared wavelengths that emit >10{sup 5} L{sub Sun} in the IRAC bands (3.6 to 8.0 {mu}m) and are not known to be background sources. Based on our estimates for the expected number of background sources, we expect that follow-up observations will show that most of these candidates are not dust enshrouded massive stars, with an expectation of only 6 {+-} 6 surviving candidates. Since we would detect true analogs of {eta} Car for roughly 200 years post-eruption, this implies that the rate of eruptions like {eta} Car is less than the core-collapse supernova rate. It is possible, however, that every M > 40 M{sub Sun} star undergoes such eruptions given our initial results. In Paper II we will characterize the candidates through further analysis and follow-up observations, and there is no barrier to increasing the galaxy sample by an order of magnitude. The primary limitation of the present search is that Spitzer's resolution limits us to the shorter wavelength IRAC bands. With the James Webb Space Telescope, such surveys can be carried out at the far more optimal wavelengths of 10-30 {mu}m, allowing identification of {eta} Car analogs for millennia rather than centuries post-eruption.

  17. BAYESIAN ANALYSIS TO IDENTIFY NEW STAR CANDIDATES IN NEARBY YOUNG STELLAR KINEMATIC GROUPS

    SciTech Connect

    Malo, Lison; Doyon, Rene; Lafreniere, David; Artigau, Etienne; Gagne, Jonathan; Baron, Frederique; Riedel, Adric E-mail: doyon@astro.umontreal.ca E-mail: artigau@astro.umontreal.ca E-mail: baron@astro.umontreal.ca

    2013-01-10

    We present a new method based on a Bayesian analysis to identify new members of nearby young kinematic groups. The analysis minimally takes into account the position, proper motion, magnitude, and color of a star, but other observables can be readily added (e.g., radial velocity, distance). We use this method to find new young low-mass stars in the {beta} Pictoris and AB Doradus moving groups and in the TW Hydrae, Tucana-Horologium, Columba, Carina, and Argus associations. Starting from a sample of 758 mid-K to mid-M (K5V-M5V) stars showing youth indicators such as H{alpha} and X-ray emission, our analysis yields 214 new highly probable low-mass members of the kinematic groups analyzed. One is in TW Hydrae, 37 in {beta} Pictoris, 17 in Tucana-Horologium, 20 in Columba, 6 in Carina, 50 in Argus, 32 in AB Doradus, and the remaining 51 candidates are likely young but have an ambiguous membership to more than one association. The false alarm rate for new candidates is estimated to be 5% for {beta} Pictoris and TW Hydrae, 10% for Tucana-Horologium, Columba, Carina, and Argus, and 14% for AB Doradus. Our analysis confirms the membership of 58 stars proposed in the literature. Firm membership confirmation of our new candidates will require measurement of their radial velocity (predicted by our analysis), parallax, and lithium 6708 A equivalent width. We have initiated these follow-up observations for a number of candidates, and we have identified two stars (2MASSJ01112542+1526214, 2MASSJ05241914-1601153) as very strong candidate members of the {beta} Pictoris moving group and one strong candidate member (2MASSJ05332558-5117131) of the Tucana-Horologium association; these three stars have radial velocity measurements confirming their membership and lithium detections consistent with young age.

  18. NGC1277: A MASSIVE COMPACT RELIC GALAXY IN THE NEARBY UNIVERSE

    SciTech Connect

    Trujillo, Ignacio; Vazdekis, Alexandre; Balcells, Marc; Snchez-Blzquez, Patricia

    2014-01-10

    As early as 10Gyr ago, galaxies with more than 10{sup 11} M {sub ?} of stars already existed. While most of these massive galaxies must have subsequently transformed through on-going star formation and mergers with other galaxies, a small fraction (?0.1%) may have survived untouched until today. Searches for such relic galaxies, useful windows to explore the early universe, have been inconclusive to date: galaxies with masses and sizes like those observed at high redshift (M {sub *} ? 10{sup 11} M {sub ?}; R{sub e} ? 1.5kpc) have been found in the local universe, but their stars are far too young for the galaxy to be a relic galaxy. This paper explores the first case of a nearby galaxy, NGC1277 (at a distance of 73 Mpc in the Perseus galaxy cluster), which fulfills many criteria to be considered a relic galaxy. Using deep optical spectroscopy, we derive the star formation history along the structure of the galaxy: the stellar populations are uniformly old (>10Gyr) with no evidence for more recent star formation episodes. The metallicity of their stars is super-solar ([Fe/H] = 0.20 0.04 with a smooth decline toward the outer regions) and ?-enriched ([?/Fe] = 0.4 0.1). This suggests a very short formation time scale for the bulk of the stars in this galaxy. This object also rotates very fast (V {sub rot} ? 300kms{sup 1}) and has a large central velocity dispersion (? > 300kms{sup 1}). NGC1277 allows the exploration in full detail of properties such as the structure, internal dynamics, metallicity, and initial mass function as they were at ?10-12Gyr ago when the first massive galaxies were built.

  19. Star formation properties in barred galaxies. III. Statistical study of bar-driven secular evolution using a sample of nearby barred spirals

    SciTech Connect

    Zhou, Zhi-Min; Wu, Hong; Cao, Chen E-mail: hwu@bao.ac.cn

    2015-01-01

    Stellar bars are important internal drivers of secular evolution in disk galaxies. Using a sample of nearby spiral galaxies with weak and strong bars, we explore the relationships between the star formation feature and stellar bars in galaxies. We find that galaxies with weak bars tend coincide with low concentrical star formation activity, while those with strong bars show a large scatter in the distribution of star formation activity. We find enhanced star formation activity in bulges toward stronger bars, although not predominantly, consistent with previous studies. Our results suggest that different stages of the secular process and many other factors may contribute to the complexity of the secular evolution. In addition, barred galaxies with intense star formation in bars tend to have active star formation in their bulges and disks, and bulges have higher star formation densities than bars and disks, indicating the evolutionary effects of bars. We then derived a possible criterion to quantify the different stages of the bar-driven physical process, while future work is needed because of the uncertainties.

  20. Newsletter Features | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Newsletter Features Newsletter Features Below are featured articles from the Indian Energy Beat newsletter. Download full issues of the newsletter. October 22, 2015 Leading the Charge: Doug MacCourt Advises Tribes on Energy Policy Leading the Charge is a regular feature spotlighting the movers and shakers in energy development on tribal lands. October 22, 2015 Message from the Director ChrisDeschene.png In May 2015 I began serving as Director of the U.S. Department of Energy's Office of Indian

  1. THE STAR FORMATION HISTORY AND CHEMICAL EVOLUTION OF STAR-FORMING GALAXIES IN THE NEARBY UNIVERSE

    SciTech Connect

    Torres-Papaqui, J. P.; Coziol, R.; Ortega-Minakata, R. A.; Neri-Larios, D. M. E-mail: rcoziol@astro.ugto.mx E-mail: daniel@astro.ugto.mx

    2012-08-01

    We have determined the metallicity (O/H) and nitrogen abundance (N/O) of a sample of 122,751 star-forming galaxies (SFGs) from the Data Release 7 of the Sloan Digital Sky Survey. For all these galaxies we have also determined their morphology and obtained a comprehensive picture of their star formation history (SFH) using the spectral synthesis code STARLIGHT. The comparison of the chemical abundance with the SFH allows us to describe the chemical evolution of the SFGs in the nearby universe (z {<=} 0.25) in a manner consistent with the formation of their stellar populations and morphologies. A high fraction (45%) of the SFGs in our sample show an excess abundance of nitrogen relative to their metallicity. We also find this excess to be accompanied by a deficiency of oxygen, which suggests that this could be the result of effective starburst winds. However, we find no difference in the mode of star formation of the nitrogen-rich and nitrogen-poor SFGs. Our analysis suggests that they all form their stars through a succession of bursts of star formation extended over a period of few Gyr. What produces the chemical differences between these galaxies seems therefore to be the intensity of the bursts: the galaxies with an excess of nitrogen are those that are presently experiencing more intense bursts or have experienced more intense bursts in their past. We also find evidence relating the chemical evolution process to the formation of the galaxies: the galaxies with an excess of nitrogen are more massive, and have more massive bulges and earlier morphologies than those showing no excess. Contrary to expectation, we find no evidence that the starburst wind efficiency decreases with the mass of the galaxies. As a possible explanation we propose that the loss of metals consistent with starburst winds took place during the formation of the galaxies, when their potential wells were still building up, and consequently were weaker than today, making starburst winds more

  2. Dark Matter Searches with Cherenkov Telescopes: Nearby Dwarf Galaxies or Local Galaxy Clusters?

    SciTech Connect

    Sanchez-Conde, Miguel A.; Cannoni, Mirco; Zandanel, Fabio; Gomez, Mario E.; Prada, Francisco; /IAA, Granada

    2012-06-06

    In this paper, we compare dwarf galaxies and galaxy clusters in order to elucidate which object class is the best target for gamma-ray DM searches with imaging atmospheric Cherenkov telescopes (IACTs). We have built a mixed dwarfs+clusters sample containing some of the most promising nearby dwarf galaxies (Draco, Ursa Minor, Wilman 1 and Segue 1) and local galaxy clusters (Perseus, Coma, Ophiuchus, Virgo, Fornax, NGC 5813 and NGC 5846), and then compute their DM annihilation flux profiles by making use of the latest modeling of their DM density profiles. We also include in our calculations the effect of DM substructure. Willman 1 appears as the best candidate in the sample. However, its mass modeling is still rather uncertain, so probably other candidates with less uncertainties and quite similar fluxes, namely Ursa Minor and Segue 1, might be better options. As for galaxy clusters, Virgo represents the one with the highest flux. However, its large spatial extension can be a serious handicap for IACT observations and posterior data analysis. Yet, other local galaxy cluster candidates with more moderate emission regions, such as Perseus, may represent good alternatives. After comparing dwarfs and clusters, we found that the former exhibit annihilation flux profiles that, at the center, are roughly one order of magnitude higher than those of clusters, although galaxy clusters can yield similar, or even higher, integrated fluxes for the whole object once substructure is taken into account. Even when any of these objects are strictly point-like according to the properties of their annihilation signals, we conclude that dwarf galaxies are best suited for observational strategies based on the search of point-like sources, while galaxy clusters represent best targets for analyses that can deal with rather extended emissions. Finally, we study the detection prospects for present and future IACTs in the framework of the constrained minimal supersymmetric standard model. We

  3. THE NEAR-INFRARED CORONAL LINE SPECTRUM OF 54 NEARBY ACTIVE GALACTIC NUCLEI

    SciTech Connect

    Rodriguez-Ardila, A.

    2011-12-20

    The relationship between the emission of coronal lines (CLs) and nuclear activity in 36 Type 1 and 18 Type 2 active galactic nuclei (AGNs) is analyzed, for the first time, based on near-infrared (0.8-2.4 {mu}m) spectra. The eight CLs studied, of Si, S, Fe, Al, and Ca elements and corresponding to ionization potentials (IPs) in the range 125-450 eV, are detected (3{sigma}) in 67% (36 AGNs) of the sample. Our analysis shows that the four most frequent CLs [Si VI] 1.963 {mu}m, [S VIII] 0.9913 {mu}m, [S IX] 1.252 {mu}m, and [Si X] 1.430 {mu}m display a narrow range in luminosity, with most lines located in the interval log L 39-40 erg s{sup -1}. We found that the non-detection is largely associated with either loss of spatial resolution or increasing object distance: CLs are essentially nuclear and easily lose contrast in the continuum stellar light for nearby sources or get diluted by the strong AGN continuum as the redshift increases. Yet, there are AGNs where the lack of coronal emission, i.e., lines with IP {>=} 100 eV, may be genuine. The absence of these lines reflects a non-standard AGN ionizing continuum, namely, a very hard spectrum lacking photons below a few Kev. The analysis of the line profiles points out a trend of increasing FWHM with increasing IPs up to energies around 300 eV, where a maximum in the FWHM is reached. For higher IP lines, the FWHM remains nearly constant or decreases with increasing IPs. We ascribe this effect to an increasing density environment as we approach the innermost regions of these AGNs, where densities above the critical density of the CLs with IPs larger than 300 eV are reached. This sets a strict range limit for the density in the boundary region between the narrow and the broad region of 10{sup 8}-10{sup 9} cm{sup -3}. A relationship between the luminosity of the CLs and that of the soft and hard X-ray emission and the soft X-ray photon index is observed: the coronal emission becomes stronger with both increasing X

  4. SUB-MILLIMETER TELESCOPE CO (2-1) OBSERVATIONS OF NEARBY STAR-FORMING GALAXIES

    SciTech Connect

    Jiang, Xue-Jian; Gu, Qiusheng; Wang, Zhong; Wang, Junzhi; Zhang, Zhi-Yu

    2015-01-20

    We present CO J = 2-1 observations toward 32 nearby gas-rich star-forming galaxies selected from the ALFALFA and Wide-field Infrared Survey Explorer (WISE) catalogs, using the Sub-millimeter Telescope (SMT). Our sample is selected to be dominated by intermediate-M {sub *} galaxies. The scaling relations between molecular gas, atomic gas, and galactic properties (stellar mass, NUV – r, and WISE color W3 – W2) are examined and discussed. Our results show the following. (1) In the galaxies with stellar mass M {sub *} ≤10{sup 10} M {sub ☉}, the H I fraction (f {sub H} {sub I} ≡ M {sub H} {sub I}/M {sub *}) is significantly higher than that of more massive galaxies, while the H{sub 2} gas fraction (f{sub H{sub 2}} ≡ M{sub H{sub 2}}/M {sub *}) remains nearly unchanged. (2) Compared to f{sub H{sub 2}}, f {sub H} {sub I} correlates better with both M {sub *} and NUV – r. (3) A new parameter, WISE color W3 – W2 (12-4.6 μm), is introduced, which is similar to NUV – r in tracing star formation activity, and we find that W3 – W2 has a tighter anti-correlation with log f{sub H{sub 2}} than the anti-correlation of (NUV – r)-f {sub H} {sub I}, (NUV – r)-f{sub H{sub 2}}, and (W3 – W2)-f {sub H} {sub I}. This indicates that W3 – W2 can trace the H{sub 2} fraction in galaxies. For the gas ratio M{sub H{sub 2}}/M {sub H} {sub I} , only in the intermediate-M {sub *} galaxies it appears to depend on M {sub *} and NUV – r. We find a tight correlation between the molecular gas mass M{sub H{sub 2}} and 12 μm (W3) luminosities (L {sub 12} {sub μm}), and the slope is close to unity (1.03 ± 0.06) for the SMT sample. This correlation may reflect that the cold gas and dust are well mixed on a global galactic scale. Using the all-sky 12 μm (W3) data available in WISE, this correlation can be used to estimate CO flux for molecular gas observations and can even predict H{sub 2} mass for star-forming galaxies.

  5. OVERVIEW OF THE SDSS-IV MaNGA SURVEY: MAPPING NEARBY GALAXIES AT APACHE POINT OBSERVATORY

    SciTech Connect

    Bundy, Kevin; Bershady, Matthew A.; Wake, David A.; Tremonti, Christy; Diamond-Stanic, Aleksandar M.; Law, David R.; Cherinka, Brian; Yan, Renbin; Snchez-Gallego, Jos R.; Drory, Niv; MacDonald, Nicholas; Weijmans, Anne-Marie; Thomas, Daniel; Masters, Karen; Coccato, Lodovico; Aragn-Salamanca, Alfonso; Avila-Reese, Vladimir; Badenes, Carles; Falcn-Barroso, Jsus; Belfiore, Francesco; and others

    2015-01-01

    We present an overview of a new integral field spectroscopic survey called MaNGA (Mapping Nearby Galaxies at Apache Point Observatory), one of three core programs in the fourth-generation Sloan Digital Sky Survey (SDSS-IV) that began on 2014 July 1. MaNGA will investigate the internal kinematic structure and composition of gas and stars in an unprecedented sample of 10,000 nearby galaxies. We summarize essential characteristics of the instrument and survey design in the context of MaNGA's key science goals and present prototype observations to demonstrate MaNGA's scientific potential. MaNGA employs dithered observations with 17 fiber-bundle integral field units that vary in diameter from 12'' (19 fibers) to 32'' (127 fibers). Two dual-channel spectrographs provide simultaneous wavelength coverage over 3600-10300 at R ? 2000. With a typical integration time of 3 hr, MaNGA reaches a target r-band signal-to-noise ratio of 4-8 ({sup 1} per 2'' fiber) at 23 AB mag arcsec{sup 2}, which is typical for the outskirts of MaNGA galaxies. Targets are selected with M {sub *} ? 10{sup 9} M {sub ?} using SDSS-I redshifts and i-band luminosity to achieve uniform radial coverage in terms of the effective radius, an approximately flat distribution in stellar mass, and a sample spanning a wide range of environments. Analysis of our prototype observations demonstrates MaNGA's ability to probe gas ionization, shed light on recent star formation and quenching, enable dynamical modeling, decompose constituent components, and map the composition of stellar populations. MaNGA's spatially resolved spectra will enable an unprecedented study of the astrophysics of nearby galaxies in the coming 6yr.

  6. A CENSUS OF BROAD-LINE ACTIVE GALACTIC NUCLEI IN NEARBY GALAXIES: COEVAL STAR FORMATION AND RAPID BLACK HOLE GROWTH

    SciTech Connect

    Trump, Jonathan R.; Fang, Jerome J.; Faber, S. M.; Koo, David C.; Kocevski, Dale D.

    2013-02-15

    We present the first quantified, statistical map of broad-line active galactic nucleus (AGN) frequency with host galaxy color and stellar mass in nearby (0.01 < z < 0.11) galaxies. Aperture photometry and z-band concentration measurements from the Sloan Digital Sky Survey are used to disentangle AGN and galaxy emission, resulting in estimates of uncontaminated galaxy rest-frame color, luminosity, and stellar mass. Broad-line AGNs are distributed throughout the blue cloud and green valley at a given stellar mass, and are much rarer in quiescent (red sequence) galaxies. This is in contrast to the published host galaxy properties of weaker narrow-line AGNs, indicating that broad-line AGNs occur during a different phase in galaxy evolution. More luminous broad-line AGNs have bluer host galaxies, even at fixed mass, suggesting that the same processes that fuel nuclear activity also efficiently form stars. The data favor processes that simultaneously fuel both star formation activity and rapid supermassive black hole accretion. If AGNs cause feedback on their host galaxies in the nearby universe, the evidence of galaxy-wide quenching must be delayed until after the broad-line AGN phase.

  7. XMM-NEWTON OBSERVATIONS OF LUMINOUS SOURCES IN NEARBY GALAXIES NGC 4395, NGC 4736, AND NGC 4258

    SciTech Connect

    Akyuz, A.; Avdan, H.; Kayaci, S.; Ozel, M. E.; Sonbas, E.; Balman, S.

    2013-03-15

    We present the results of a study of non-nuclear discrete sources in a sample of three nearby spiral galaxies (NGC 4395, NGC 4736, and NGC 4258) based on XMM-Newton archival data supplemented with Chandra data for spectral and timing analyses. A total of 75 X-ray sources have been detected within the D{sub 25} regions of the target galaxies. The large collecting area of XMM-Newton makes the statistics sufficient to obtain spectral fitting for 16 (about 20%) of these sources. Compiling the extensive archival exposures available, we were able to obtain the detailed spectral shapes of diverse classes of point sources. We have also studied temporal properties of these luminous sources. Eleven of them are found to show short-term (less than 80 ks) variation while eight of them show long-term variation within factors of {approx}2-5 during a time interval of {approx}2-12 years. Timing analysis provides strong evidence that most of these sources are accreting X-ray binary systems. One source that has properties different from others was suspected to be a supernova remnant, and our follow-up optical observation confirmed this. Our results indicate that sources within the three nearby galaxies are showing a variety of source populations, including several ultraluminous X-ray sources, X-ray binaries, transients together with a super soft source, and a background active galactic nucleus candidate.

  8. DOE - NNSA/NFO -- Featured Items

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Featured Items includeslanguage.htm Featured Items The Nevada Field Office Featured Items section provides quick access to brief program updates and some of the more popular new ...

  9. 1999 Commercial Buildings Characteristics--Conservation Features...

    Energy Information Administration (EIA) (indexed site)

    Conservation Features and Practices Topics: Energy Sources and End Uses End-Use Equipment Conservation Features and Practices Conservation Features and Practices The 1999 CBECS...

  10. Features

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Faces of Science The people behind our science Radical Supercomputing Extreme speeds, big data, powerful simulations 70 Years of Innovation Addressing the nation's most complex ...

  11. BANYAN. II. Very low mass and substellar candidate members to nearby, young kinematic groups with previously known signs of youth

    SciTech Connect

    Gagn, Jonathan; Lafrenire, David; Doyon, Ren; Malo, Lison; Artigau, tienne

    2014-03-10

    We present Bayesian Analysis for Nearby Young AssociatioNs II (BANYAN II), a modified Bayesian analysis for assessing the membership of later-than-M5 objects to any of several Nearby Young Associations (NYAs). In addition to using kinematic information (from sky position and proper motion), this analysis exploits 2MASS-WISE color-magnitude diagrams in which old and young objects follow distinct sequences. As an improvement over our earlier work, the spatial and kinematic distributions for each association are now modeled as ellipsoids whose axes need not be aligned with the Galactic coordinate axes, and we use prior probabilities matching the expected populations of the NYAs considered versus field stars. We present an extensive contamination analysis to characterize the performance of our new method. We find that Bayesian probabilities are generally representative of contamination rates, except when a parallax measurement is considered. In this case contamination rates become significantly smaller and hence Bayesian probabilities for NYA memberships are pessimistic. We apply this new algorithm to a sample of 158 objects from the literature that are either known to display spectroscopic signs of youth or have unusually red near-infrared colors for their spectral type. Based on our analysis, we identify 25 objects as new highly probable candidates to NYAs, including a new M7.5 bona fide member to Tucana-Horologium, making it the latest-type member. In addition, we reveal that a known L2? dwarf is co-moving with a bright M5 dwarf, and we show for the first time that two of the currently known ultra red L dwarfs are strong candidates to the AB Doradus moving group. Several objects identified here as highly probable members to NYAs could be free-floating planetary-mass objects if their membership is confirmed.

  12. THE 60 MONTH ALL-SKY BURST ALERT TELESCOPE SURVEY OF ACTIVE GALACTIC NUCLEUS AND THE ANISOTROPY OF NEARBY AGNs

    SciTech Connect

    Ajello, M.; Madejski, G. M.; Alexander, D. M.; Greiner, J.; Burlon, D.; Gehrels, N.

    2012-04-10

    Surveys above 10 keV represent one of the best resources to provide an unbiased census of the population of active galactic nuclei (AGNs). We present the results of 60 months of observation of the hard X-ray sky with Swift/Burst Alert Telescope (BAT). In this time frame, BAT-detected (in the 15-55 keV band) 720 sources in an all-sky survey of which 428 are associated with AGNs, most of which are nearby. Our sample has negligible incompleteness and statistics a factor of {approx}2 larger over similarly complete sets of AGNs. Our sample contains (at least) 15 bona fide Compton-thick AGNs and 3 likely candidates. Compton-thick AGNs represent {approx}5% of AGN samples detected above 15 keV. We use the BAT data set to refine the determination of the log N-log S of AGNs which is extremely important, now that NuSTAR prepares for launch, toward assessing the AGN contribution to the cosmic X-ray background. We show that the log N-log S of AGNs selected above 10 keV is now established to {approx}10% precision. We derive the luminosity function of Compton-thick AGNs and measure a space density of 7.9{sup +4.1}{sub -2.9} Multiplication-Sign 10{sup -5} Mpc{sup -3} for objects with a de-absorbed luminosity larger than 2 Multiplication-Sign 10{sup 42} erg s{sup -1}. As the BAT AGNs are all mostly local, they allow us to investigate the spatial distribution of AGNs in the nearby universe regardless of absorption. We find concentrations of AGNs that coincide spatially with the largest congregations of matter in the local ({<=}85 Mpc) universe. There is some evidence that the fraction of Seyfert 2 objects is larger than average in the direction of these dense regions.

  13. The MCLIB library: New features

    SciTech Connect

    Seeger, P.A.

    1996-12-31

    This report describes the philosophy and structure of MCLIB, A Fortran library of Monte Carlo subroutines which has been developed to test designs of neutron scattering instruments. Emphasis is placed on new features added to the library since the previous presentation of MCLIB at ICANS-XIII in October, 1995. These new features include toroidal mirrors, writing and reading source files, splitting and banking of histories, and a Maxwellian probability distribution. The only change of a program structure has been to include charge and polarization vector in the description of a particle. The latest release of the source code and documentation may be obtained by anonymous ftp. Work is also continuing on a more friendly web-based user interface, and user input is requested for additional features to be added to the library.

  14. ARM - Features and Releases Archive

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    CenterFeaturesFeatures and Releases Archive Media Contact Hanna Goss hanna-dot-goss-at-pnnl-dot-gov @armnewsteam Field Notes Blog Topics Field Notes118 AGU 3 AMIE 10 ARM Aerial Facility 2 ARM Mobile Facility 1 7 ARM Mobile Facility 2 47 ARM Mobile Facility 3 1 BAECC 1 BBOP 4 CARES 1 Data Quality Office 2 ENA 2 GOAMAZON 7 HI-SCALE 5 LASIC 3 MAGIC 15 MC3E 17 PECAN 3 SGP 8 STORMVEX 29 TCAP 3 Search News Search Blog News Center All Categories What's this? Social Media Guidance News Center All

  15. Alternative Fuels Data Center: News and Features

    Alternative Fuels and Advanced Vehicles Data Center

    News and Features to someone by E-mail Share Alternative Fuels Data Center: News and Features on Facebook Tweet about Alternative Fuels Data Center: News and Features on Twitter Bookmark Alternative Fuels Data Center: News and Features on Google Bookmark Alternative Fuels Data Center: News and Features on Delicious Rank Alternative Fuels Data Center: News and Features on Digg Find More places to share Alternative Fuels Data Center: News and Features on AddThis.com... More in this section...

  16. NIF featured on BBC "Horizon"

    SciTech Connect

    Brian Cox

    2010-01-12

    The National Ignition Facility, the world's largest laser system, located at Lawrence Livermore National Laboratory, was featured in the BBC broadcast "Horizon" hosted by physicist Brian Cox. Here is the NIF portion of the program, which was entitled "Can We Make A Star On Earth?" This video is used with the express permission of the BBC.

  17. NIF featured on BBC "Horizon"

    ScienceCinema

    Brian Cox

    2016-07-12

    The National Ignition Facility, the world's largest laser system, located at Lawrence Livermore National Laboratory, was featured in the BBC broadcast "Horizon" hosted by physicist Brian Cox. Here is the NIF portion of the program, which was entitled "Can We Make A Star On Earth?" This video is used with the express permission of the BBC.

  18. Feature Stories | Argonne National Laboratory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Feature Stories Topic - Any - General Argonne Information -Awards -Honors Energy -Energy efficiency --Vehicles ---Alternative fuels ---Automotive engineering ---Biofuels ---Diesel ---Electric drive technology ---Fuel economy ---Fuel injection ---Heavy-duty vehicles ---Hybrid & electric vehicles ---Hydrogen & fuel cells ---Internal combustion ---Maglev systems ---Powertrain research ---Vehicle testing --Building design ---Construction ---Industrial heating & cooling ---Industrial

  19. Feature Stories | Argonne National Laboratory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Feature Stories Topic - Any - General Argonne Information -Awards -Honors Energy -Energy efficiency --Vehicles ---Alternative fuels ---Automotive engineering ---Biofuels ---Diesel ---Electric drive technology ---Fuel economy ---Fuel injection ---Heavy-duty vehicles ---Hybrid & electric vehicles ---Hydrogen & fuel cells ---Internal combustion ---Maglev systems ---Powertrain research ---Vehicle testing --Building design ---Construction ---Industrial heating & cooling ---Industrial

  20. Feature Stories | The Ames Laboratory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Feature Stories Materials Preparation Center turns 35 The Materials Preparation Center is celebrating 35 years of providing the world's highest quality rare-earth metals and custom alloys that researchers and industry can find nowhere else. Take a look at MPC's history and what takes place in the southeast corner of the Metals Development building. (11/3/2016) READ MORE Ames Laboratory Scientists Leave Their Mark on Future Researchers Eight out of the past 10 years, Ames Laboratory chemist Aaron

  1. Design of Roadside Safety Features

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Analysis and Design of the Roadside Safety Features for Safety Performance Texas Transportation Institute (TTI) researchers are investigating the performance of a crash wall design to determine its effectiveness in reducing the damage to mechanically supported earth (MSE) wall panels during a vehicular impact. The simulations are based on Test Level 4 impact conditions of the new AASHTO Manual for Assessing Safety Hardware (MASH). This involves a 10,000-kg single unit truck (SUT) impacting at 90

  2. Sustainable Transportation and National Parks Initiative Featured...

    Energy Saver

    Sustainable Transportation and National Parks Initiative Featured in Magazine Sustainable Transportation and National Parks Initiative Featured in Magazine October 18, 2013 - ...

  3. Power line fault current coupling to nearby natural gas pipelines: Volume 3, Analysis of pipeline coating impedance: Final report

    SciTech Connect

    Dabkowski, J.; Frazier, M. J.

    1988-08-01

    This report is a compilation of results obtained from two research programs. The response of a pipeline and coating at the higher voltage excitation levels encountered under power line fault conditions appears to be dominated by conduction at holiday sites in the coating. A simple analytical model was developed for predicting the resistance of a pipeline coating holiday as a function of the voltage produced across the pipeline coating by a nearby faulted power transmission line. The model was initially validated using coated pipeline samples stressed by a capacitive discharge voltage. Additional validation tests were then performed at the Pacific Gas and Electric Company's High Voltage Engineering Research Facility using high voltage ac waveforms for fault simulation. The principle program objective was to develop, both by laboratory and controlled field testing, an electrical resistance characterization for the pipeline coating as a function of the applied voltage level. The development of this model will allow a more accurate prediction of coupled voltage levels to a pipeline during fault current conditions. 54 figs, 3 tabs.

  4. SUBARU AND GEMINI HIGH SPATIAL RESOLUTION INFRARED 18 {mu}m IMAGING OBSERVATIONS OF NEARBY LUMINOUS INFRARED GALAXIES

    SciTech Connect

    Imanishi, Masatoshi; Imase, Keisuke; Oi, Nagisa; Ichikawa, Kohei

    2011-05-15

    We present the results of a ground-based, high spatial resolution infrared 18 {mu}m imaging study of nearby luminous infrared galaxies (LIRGs), using the Subaru 8.2 m and Gemini-South 8.1 m telescopes. The diffraction-limited images routinely achieved with these telescopes in the Q band (17-23 {mu}m) allow us to investigate the detailed spatial distribution of infrared emission in these LIRGs. We then investigate whether the emission surface brightnesses are modest, as observed in starbursts, or are so high that luminous active galactic nuclei (AGNs; high emission surface brightness energy sources) are indicated. The sample consists of 18 luminous buried AGN candidates and starburst-classified LIRGs identified in earlier infrared spectroscopy. We find that the infrared 18 {mu}m emission from the buried AGN candidates is generally compact, and the estimated emission surface brightnesses are high, sometimes exceeding the maximum value observed in and theoretically predicted for a starburst phenomenon. The starburst-classified LIRGs usually display spatially extended 18 {mu}m emission and the estimated emission surface brightnesses are modest, within the range sustained by a starburst phenomenon. The general agreement between infrared spectroscopic and imaging energy diagnostic methods suggests that both are useful tools for understanding the hidden energy sources of the dusty LIRG population.

  5. No X-rays from the very nearby type Ia SN 2014J: Constraints on its environment

    SciTech Connect

    Margutti, R.; Parrent, J.; Kamble, A.; Soderberg, A. M.; Milisavljevic, D.; Drout, M. R.; Kirshner, R. [Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138 (United States); Foley, R. J. [Astronomy Department, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801 (United States)

    2014-07-20

    Deep X-ray observations of the post-explosion environment around the very nearby Type Ia SN 2014J (d{sub L} = 3.5 Mpc) reveal no X-ray emission down to a luminosity L{sub x} < 7 10{sup 36} erg s{sup 1} (0.3-10 keV) at ?t ? 20 days after the explosion. We interpret this limit in the context of inverse Compton emission from upscattered optical photons by the supernova shock and constrain the pre-explosion mass-loss rate of the stellar progenitor system to be M-dot <10{sup ?9} M{sub ?} yr{sup ?1} (for wind velocity v{sub w} = 100 km s{sup 1}). Alternatively, the SN shock might be expanding into a uniform medium with density n{sub CSM} < 3 cm{sup 3}. These results rule out single-degenerate (SD) systems with steady mass loss until the terminal explosion and constrain the fraction of transferred material lost at the outer Lagrangian point to be ?1%. The allowed progenitors are (1) white dwarf-white dwarf progenitors, (2) SD systems with unstable hydrogen burning experiencing recurrent nova eruptions with recurrence time t < 300 yr, and (3) stars where the mass loss ceases before the explosion.

  6. THE JAMES CLERK MAXWELL TELESCOPE NEARBY GALAXIES LEGACY SURVEY. II. WARM MOLECULAR GAS AND STAR FORMATION IN THREE FIELD SPIRAL GALAXIES

    SciTech Connect

    Warren, B. E.; Wilson, C. D.; Sinukoff, E.; Israel, F. P.; Van der Werf, P. P.; Serjeant, S.; Bendo, G. J.; Clements, D. L.; Brinks, E.; Irwin, J. A.; Knapen, J. H.; Leech, J.; Tan, B. K.; Matthews, H. E.; Muehle, S.; Mortimer, A. M. J.; Petitpas, G.; Spekkens, K.; Tilanus, R. P. J.; Usero, A. E-mail: wilson@physics.mcmaster.c E-mail: israel@strw.leidenuniv.n

    2010-05-01

    We present the results of large-area {sup 12}CO J = 3-2 emission mapping of three nearby field galaxies, NGC 628, NGC 3521, and NGC 3627, completed at the James Clerk Maxwell Telescope as part of the Nearby Galaxies Legacy Survey. These galaxies all have moderate to strong {sup 12}CO J = 3-2 detections over large areas of the fields observed by the survey, showing resolved structure and dynamics in their warm/dense molecular gas disks. All three galaxies were part of the Spitzer Infrared Nearby Galaxies Survey sample, and as such have excellent published multiwavelength ancillary data. These data sets allow us to examine the star formation properties, gas content, and dynamics of these galaxies on sub-kiloparsec scales. We find that the global gas depletion time for dense/warm molecular gas in these galaxies is consistent with other results for nearby spiral galaxies, indicating this may be independent of galaxy properties such as structures, gas compositions, and environments. Similar to the results from The H I Nearby Galaxy Survey, we do not see a correlation of the star formation efficiency with the gas surface density consistent with the Schmidt-Kennicutt law. Finally, we find that the star formation efficiency of the dense molecular gas traced by {sup 12}CO J = 3-2 is potentially flat or slightly declining as a function of molecular gas density, the {sup 12}CO J = 3-2/J = 1-0 ratio (in contrast to the correlation found in a previous study into the starburst galaxy M83), and the fraction of total gas in molecular form.

  7. A SURVEY OF THE HIGH ORDER MULTIPLICITY OF NEARBY SOLAR-TYPE BINARY STARS WITH Robo-AO

    SciTech Connect

    Riddle, Reed L.; Bui, Khanh; Dekany, Richard G.; Kulkarni, Shrinivas; Tendulkar, Shriharsh P.; Tokovinin, Andrei; Mason, Brian D.; Hartkopf, William I.; Roberts, Lewis C. Jr.; Baranec, Christoph; Law, Nicholas M.; Burse, Mahesh P.; Das, H. K.; Punnadi, Sujit; Ramaprakash, A. N.

    2015-01-20

    We conducted a survey of nearby binary systems composed of main sequence stars of spectral types F and G in order to improve our understanding of the hierarchical nature of multiple star systems. Using Robo-AO, the first robotic adaptive optics instrument, we collected high angular resolution images with deep and well-defined detection limits in the Sloan Digital Sky Survey i' band. A total of 695 components belonging to 595 systems were observed. We prioritized observations of faint secondary components with separations over 10'' to quantify the still poorly constrained frequency of their subsystems. Of the 214 secondaries observed, 39 contain such subsystems; 19 of those were discovered with Robo-AO. The selection-corrected frequency of secondary subsystems with periods from 10{sup 3.5} to 10{sup 5}days is 0.12 0.03, the same as the frequency of such companions to the primary. Half of the secondary pairs belong to quadruple systems where the primary is also a close pair, showing that the presence of subsystems in both components of the outer binary is correlated. The relatively large abundance of 2+2 quadruple systems is a new finding, and will require more exploration of the formation mechanism of multiple star systems. We also targeted close binaries with periods less than 100 yr, searching for their distant tertiary components, and discovered 17 certain and 2 potential new triples. In a subsample of 241 close binaries, 71 have additional outer companions. The overall frequency of tertiary components is not enhanced, compared to all (non-binary) targets, but in the range of outer periods from 10{sup 6} to 10{sup 7.5}days (separations on the order of 500 AU), the frequency of tertiary components is 0.16 0.03, exceeding the frequency of similar systems among all targets (0.09) by almost a factor of two. Measurements of binary stars with Robo-AO allowed us to compute first orbits for 9 pairs and to improve orbits of another 11 pairs.

  8. A WIDELY SEPARATED, HIGHLY OCCLUDED COMPANION TO THE NEARBY LOW-MASS T TAURI STAR TWA 30

    SciTech Connect

    Looper, Dagny L.; Pitts, Mark A.; Bochanski, John J.; Burgasser, Adam J.; Mohanty, Subhanjoy; Mamajek, Eric E.; Faherty, Jacqueline K.; West, Andrew A.

    2010-11-15

    We report the discovery of TWA 30B, a wide ({approx}3400 AU), co-moving M dwarf companion to the nearby ({approx}42 pc) young star TWA 30. Companionship is confirmed from their statistically consistent proper motions and radial velocities (RVs), as well as a chance alignment probability of only 0.08%. Like TWA 30A, the spectrum of TWA 30B shows signatures of an actively accreting disk (H I and alkali line emission) and forbidden emission lines tracing outflowing material ([O I], [O II], [O III], [S II], and [N II]). We have also detected [C I] emission in the optical data, marking the first such detection of this line in a pre-main-sequence star. Negligible RV shifts in the emission lines relative to the stellar frame of rest ({Delta}V {approx}< 30 km s{sup -1}) indicate that the outflows are viewed in the plane of the sky and that the corresponding circumstellar disk is viewed edge-on. Indeed, TWA 30B appears to be heavily obscured by its disk, given that it is 5 mag fainter than TWA 30A at K band despite having a slightly earlier spectral type (M4 versus M5). The near-infrared spectrum of TWA 30B also evinces an excess that varies on day timescales, with colors that follow classical T Tauri tracks as opposed to variable reddening (as is the case for TWA 30A). Multi-epoch data show this excess to be well modeled by a black body component with temperatures ranging from 630 to 880 K and emitting areas that scale inversely with the temperature. The variable excess may arise from disk structure such as a rim or a warp at the inner disk edge located at a radial distance of {approx}3-5 R{sub sun}. As the second and third closest actively accreting and outflowing stars to the Sun (after TWA 3), TWA 30AB presents an ideal system for a detailed study of star and planetary formation processes at the low-mass end of the hydrogen-burning spectrum.

  9. TORUS AND ACTIVE GALACTIC NUCLEUS PROPERTIES OF NEARBY SEYFERT GALAXIES: RESULTS FROM FITTING INFRARED SPECTRAL ENERGY DISTRIBUTIONS AND SPECTROSCOPY

    SciTech Connect

    Alonso-Herrero, Almudena; Ramos Almeida, Cristina; Mason, Rachel; Asensio Ramos, Andres; Rodriguez Espinosa, Jose Miguel; Perez-Garcia, Ana M.; Roche, Patrick F.; Levenson, Nancy A.; Elitzur, Moshe; Packham, Christopher; Young, Stuart; Diaz-Santos, Tanio

    2011-08-01

    We used the CLUMPY torus models and a Bayesian approach to fit the infrared spectral energy distributions and ground-based high angular resolution mid-infrared spectroscopy of 13 nearby Seyfert galaxies. This allowed us to put tight constraints on torus model parameters such as the viewing angle i, the radial thickness of the torus Y, the angular size of the cloud distribution {sigma}{sub torus}, and the average number of clouds along radial equatorial rays N{sub 0}. We found that the viewing angle i is not the only parameter controlling the classification of a galaxy into type 1 or type 2. In principle, type 2s could be viewed at any viewing angle i as long as there is one cloud along the line of sight. A more relevant quantity for clumpy media is the probability for an active galactic nucleus (AGN) photon to escape unabsorbed. In our sample, type 1s have relatively high escape probabilities, P{sub esc} {approx} 12%-44%, while type 2s, as expected, tend to have very low escape probabilities. Our fits also confirmed that the tori of Seyfert galaxies are compact with torus model radii in the range 1-6 pc. The scaling of the models to the data also provided the AGN bolometric luminosities L{sub bol}(AGN), which were found to be in good agreement with estimates from the literature. When we combined our sample of Seyfert galaxies with a sample of PG quasars from the literature to span a range of L{sub bol}(AGN) {approx} 10{sup 43}-10{sup 47} erg s{sup -1}, we found plausible evidence of the receding torus. That is, there is a tendency for the torus geometrical covering factor to be lower (f{sub 2} {approx} 0.1-0.3) at high AGN luminosities than at low AGN luminosities (f{sub 2} {approx} 0.9-1 at {approx}10{sup 43}-10{sup 44} erg s{sup -1}). This is because at low AGN luminosities the tori appear to have wider angular sizes (larger {sigma}{sub torus}) and more clouds along radial equatorial rays. We cannot, however, rule out the possibility that this is due to

  10. PHISICS: New Features and Advancements

    SciTech Connect

    C. Rabiti; Y. Wang; G. Palmiotti; H. Hiruta; J. Cogliati; A. Alfonsi; A. EPiney; T. Grimmett

    2011-06-01

    The PHISICS (Parallel and Highly Innovative Simulation for INL Code System) software is under an intensive development at INL. In the last months new features have been added and improvements of the previously existing one performed. The modular approach has created a friendly development environment that allows a quick expansion of the capabilities. In the last months a little amount of work has been dedicated to the improvement of the spherical harmonics based nodal transport solver while the implementation of a solver based on the self adjoint formulation of the discrete ordinate is in the test phase on structured mesh. PHISICS now include a depletion solver with the option to use two different algorithms for the solution of the Bateman equation: the Taylor development of the exponential matrix and the Chebyshev Rational Approximation Method. The coupling with RELAP5 is also available at least in the steady state search mode. The coupling between RELAP5 and PHISICS can also take advantage of the new cross section interpolation module so that the coupling could be performed using an arbitrary number of energy groups.

  11. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    25, 2009 [Feature Stories and Releases] Nature Magazine Features Mobile Facility Deployment In China Bookmark and Share A news feature published in Vol. 461 of Nature magazine covers the ARM Mobile Facility deployment in China. A news feature published in Vol. 461 of Nature magazine covers the ARM Mobile Facility deployment in China. In 2008, with all eyes on Beijing during the Olympics, the ARM Mobile Facility quietly obtained eight months of climate data from the city of Shouxian, west of

  12. @ work' video segment features Robotic Software Engineer

    ScienceCinema

    Idaho National Laboratory

    2010-01-08

    @ work highlights Idaho National Laboratory employees and the jobs they perform.This segment features Robotic Software Engineer Miles Walton.

  13. @ work' video segment features Robotic Software Engineer

    SciTech Connect

    Idaho National Laboratory

    2008-03-27

    @ work highlights Idaho National Laboratory employees and the jobs they perform.This segment features Robotic Software Engineer Miles Walton.

  14. Satellite stories featured in Lab lecture series

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Satellite stories featured Satellite stories featured in Lab lecture series Space adventures will be featured in the upcoming Frontiers in Science lecture series "Small Satellites on a Shoestring: The LANL Experience." February 14, 2008 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new

  15. Composite, ordered material having sharp surface features

    DOEpatents

    D'Urso, Brian R.; Simpson, John T.

    2006-12-19

    A composite material having sharp surface features includes a recessive phase and a protrusive phase, the recessive phase having a higher susceptibility to a preselected etchant than the protrusive phase, the composite material having an etched surface wherein the protrusive phase protrudes from the surface to form a sharp surface feature. The sharp surface features can be coated to make the surface super-hydrophobic.

  16. Flexible feature interface for multimedia sources

    DOEpatents

    Coffland, Douglas R.

    2009-06-09

    A flexible feature interface for multimedia sources system that includes a single interface for the addition of features and functions to multimedia sources and for accessing those features and functions from remote hosts. The interface utilizes the export statement: export "C" D11Export void FunctionName(int argc, char ** argv,char * result, SecureSession *ctrl) or the binary equivalent of the export statement.

  17. Demonstration Projects Feature Innovative Offshore Wind Technologies |

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Department of Energy Demonstration Projects Feature Innovative Offshore Wind Technologies Demonstration Projects Feature Innovative Offshore Wind Technologies October 24, 2016 - 3:40pm Addthis From floating foundations to twisted jacket and Mono Bucket foundations, some of the nation's most inventive offshore wind technologies are featured in a portfolio of advanced offshore wind energy demonstration projects that the Energy Department has been supporting since 2012. "All of these

  18. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    2, 2006 Feature Stories and Releases Synchronized Flights by U.S. and International Research Aircraft Reveal Intriguing Information about Ice Particles in Clouds Bookmark and...

  19. LC-IMS-MS Feature Finder

    SciTech Connect

    2013-03-07

    LC-IMS-MS Feature Finder is a command line software application which searches for possible molecular ion signatures in multidimensional liquid chromatography, ion mobility spectrometry, and mass spectrometry data by clustering deisotoped peaks with similar monoisotopic mass values, charge states, elution times, and drift times. The software application includes an algorithm for detecting multiple conformations and co-eluting species in the ion mobility dimension. LC-IMS-MS Feature Finder is designed to create an output file with detected features that includes associated information about the detected features.

  20. LC-IMS-MS Feature Finder

    Energy Science and Technology Software Center

    2013-03-07

    LC-IMS-MS Feature Finder is a command line software application which searches for possible molecular ion signatures in multidimensional liquid chromatography, ion mobility spectrometry, and mass spectrometry data by clustering deisotoped peaks with similar monoisotopic mass values, charge states, elution times, and drift times. The software application includes an algorithm for detecting multiple conformations and co-eluting species in the ion mobility dimension. LC-IMS-MS Feature Finder is designed to create an output file with detected features thatmore » includes associated information about the detected features.« less

  1. Exploring quantum control landscapes: Topology, features, and...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Exploring quantum control landscapes: Topology, features, and optimization scaling Citation Details In-Document Search Title: Exploring quantum control landscapes: ...

  2. Digital Mapping Of Structurally Controlled Geothermal Features...

    OpenEI (Open Energy Information) [EERE & EIA]

    GPS Units And Pocket Computers Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Digital Mapping Of Structurally Controlled Geothermal Features...

  3. CARMA SURVEY TOWARD INFRARED-BRIGHT NEARBY GALAXIES (STING). III. THE DEPENDENCE OF ATOMIC AND MOLECULAR GAS SURFACE DENSITIES ON GALAXY PROPERTIES

    SciTech Connect

    Wong, Tony; Xue, Rui; Bolatto, Alberto D.; Fisher, David B.; Vogel, Stuart N.; Leroy, Adam K.; Blitz, Leo; Rosolowsky, Erik; Bigiel, Frank; Ott, Jrgen; Rahman, Nurur; Walter, Fabian

    2013-11-01

    We investigate the correlation between CO and H I emission in 18 nearby galaxies from the CARMA Survey Toward IR-Bright Nearby Galaxies (STING) at sub-kpc and kpc scales. Our sample, spanning a wide range in stellar mass and metallicity, reveals evidence for a metallicity dependence of the H I column density measured in regions exhibiting CO emission. Such a dependence is predicted by the equilibrium model of McKee and Krumholz, which balances H{sub 2} formation and dissociation. The observed H I column density is often smaller than predicted by the model, an effect we attribute to unresolved clumping, although values close to the model prediction are also seen. We do not observe H I column densities much larger than predicted, as might be expected were there a diffuse H I component that did not contribute to H{sub 2} shielding. We also find that the H{sub 2} column density inferred from CO correlates strongly with the stellar surface density, suggesting that the local supply of molecular gas is tightly regulated by the stellar disk.

  4. Nature Climate Change features Los Alamos forest research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Nature Climate Change Features Forest Research Nature Climate Change features Los Alamos forest research The print issue features as its cover story the tree-stress research of ...

  5. Nature Climate Change features Los Alamos forest research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Nature Climate Change Features Forest Research Nature Climate Change features Los Alamos forest research The print issue features as its cover story the tree-stress research of...

  6. Image fusion using sparse overcomplete feature dictionaries

    SciTech Connect

    Brumby, Steven P.; Bettencourt, Luis; Kenyon, Garrett T.; Chartrand, Rick; Wohlberg, Brendt

    2015-10-06

    Approaches for deciding what individuals in a population of visual system "neurons" are looking for using sparse overcomplete feature dictionaries are provided. A sparse overcomplete feature dictionary may be learned for an image dataset and a local sparse representation of the image dataset may be built using the learned feature dictionary. A local maximum pooling operation may be applied on the local sparse representation to produce a translation-tolerant representation of the image dataset. An object may then be classified and/or clustered within the translation-tolerant representation of the image dataset using a supervised classification algorithm and/or an unsupervised clustering algorithm.

  7. THE LICK-CARNEGIE EXOPLANET SURVEY: A 3.1 M{sub +} PLANET IN THE HABITABLE ZONE OF THE NEARBY M3V STAR GLIESE 581

    SciTech Connect

    Vogt, Steven S.; Rivera, E. J.; Haghighipour, N.; Henry, Gregory W.; Williamson, Michael H.

    2010-11-01

    We present 11 years of HIRES precision radial velocities (RVs) of the nearby M3V star Gliese 581, combining our data set of 122 precision RVs with an existing published 4.3-year set of 119 HARPS precision RVs. The velocity set now indicates six companions in Keplerian motion around this star. Differential photometry indicates a likely stellar rotation period of {approx}94 days and reveals no significant periodic variability at any of the Keplerian periods, supporting planetary orbital motion as the cause of all the RV variations. The combined data set strongly confirms the 5.37-day, 12.9-day, 3.15-day, and 67-day planets previously announced by Bonfils et al., Udry et al., and Mayor et al.. The observations also indicate a fifth planet in the system, GJ 581f, a minimum-mass 7.0 M{sub +} planet orbiting in a 0.758 AU orbit of period 433 days, and a sixth planet, GJ 581g, a minimum-mass 3.1 M{sub +} planet orbiting at 0.146 AU with a period of 36.6 days. The estimated equilibrium temperature of GJ 581g is 228 K, placing it squarely in the middle of the habitable zone of the star and offering a very compelling case for a potentially habitable planet around a very nearby star. That a system harboring a potentially habitable planet has been found this nearby, and this soon in the relatively early history of precision RV surveys, indicates that {eta}{sub +}, the fraction of stars with potentially habitable planets, is likely to be substantial. This detection, coupled with statistics of the incompleteness of present-day precision RV surveys for volume-limited samples of stars in the immediate solar neighborhood, suggests that {eta}{sub +} could well be on the order of a few tens of percent. If the local stellar neighborhood is a representative sample of the galaxy as a whole, our Milky Way could be teeming with potentially habitable planets.

  8. ARM - 2010 AMS Presentations Featuring ARM Data

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    SGP 6 STORMVEX 29 TCAP 3 Search News Search Blog News Center All Categories What's this? Social Media Guidance News Center All Categories Features and Releases Facility News Field...

  9. ARM - 2009 AGU Presentations Featuring ARM Data

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    SGP 6 STORMVEX 29 TCAP 3 Search News Search Blog News Center All Categories What's this? Social Media Guidance News Center All Categories Features and Releases Facility News Field...

  10. ARM - 2014 AMS Presentations Featuring ARM Data

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    SGP 6 STORMVEX 29 TCAP 3 Search News Search Blog News Center All Categories What's this? Social Media Guidance News Center All Categories Features and Releases Facility News Field...

  11. Feature Clustering for Accelerating Parallel Coordinate Descent

    SciTech Connect

    Scherrer, Chad; Tewari, Ambuj; Halappanavar, Mahantesh; Haglin, David J.

    2012-12-06

    We demonstrate an approach for accelerating calculation of the regularization path for L1 sparse logistic regression problems. We show the benefit of feature clustering as a preconditioning step for parallel block-greedy coordinate descent algorithms.

  12. Category:Topographic Features | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Features" The following 9 pages are in this category, out of 9 total. C Caldera Depression Cinder Cone F Flat H Horst and Graben L Lava Dome M Mountainous R Resurgent Dome...

  13. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    January 6, 2010 Feature Stories and Releases Cirrus Clouds Hold Clues to Climate Bookmark and Share Research flights will obtain most comprehensive data set to-date for climate ...

  14. Feature Based Measuring, Version 2.1

    Energy Science and Technology Software Center

    2002-07-22

    A model-based tool that uses Measurement Features for generating measurement plans that facilitate DMIS compliant CMM Measurement part programs for both manufacturing verification and/or product acceptance.

  15. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    November 4, 2004 [Feature Stories and Releases] Media Advisory: New Climate Education Resource Available Online for Teachers and Students Bookmark and Share Media Contact: Lynne Roeder, 509.372.4331 Technical Contact: Andrea Maestas, 505.665.7997 LOS ALAMOS, N.M.-A newly designed education website sponsored by the U.S. Department of Energy (DOE) features activities and information about climate change and atmospheric science for students and teachers. Education and outreach staff involved in

  16. Topology-based Feature Definition and Analysis

    SciTech Connect

    Weber, Gunther H.; Bremer, Peer-Timo; Gyulassy, Attila; Pascucci, Valerio

    2010-12-10

    Defining high-level features, detecting them, tracking them and deriving quantities based on them is an integral aspect of modern data analysis and visualization. In combustion simulations, for example, burning regions, which are characterized by high fuel-consumption, are a possible feature of interest. Detecting these regions makes it possible to derive statistics about their size and track them over time. However, features of interest in scientific simulations are extremely varied, making it challenging to develop cross-domain feature definitions. Topology-based techniques offer an extremely flexible means for general feature definitions and have proven useful in a variety of scientific domains. This paper will provide a brief introduction into topological structures like the contour tree and Morse-Smale complex and show how to apply them to define features in different science domains such as combustion. The overall goal is to provide an overview of these powerful techniques and start a discussion how these techniques can aid in the analysis of astrophysical simulations.

  17. BANYAN. V. A SYSTEMATIC ALL-SKY SURVEY FOR NEW VERY LATE-TYPE LOW-MASS STARS AND BROWN DWARFS IN NEARBY YOUNG MOVING GROUPS

    SciTech Connect

    Gagn, Jonathan; Lafrenire, David; Doyon, Ren; Malo, Lison; Artigau, tienne

    2015-01-10

    We present the BANYAN All-Sky Survey (BASS) catalog, consisting of 228 new late-type (M4-L6) candidate members of nearby young moving groups (YMGs) with an expected false-positive rate of ?13%. This sample includes 79 new candidate young brown dwarfs and 22 planetary-mass objects. These candidates were identified through the first systematic all-sky survey for late-type low-mass stars and brown dwarfs in YMGs. We cross-matched the Two Micron All Sky Survey and AllWISE catalogs outside of the galactic plane to build a sample of 98,970 potential ?M5 dwarfs in the solar neighborhood and calculated their proper motions with typical precisions of 5-15 mas yr{sup 1}. We selected highly probable candidate members of several YMGs from this sample using the Bayesian Analysis for Nearby Young AssociatioNsII tool (BANYANII). We used the most probable statistical distances inferred from BANYANII to estimate the spectral type and mass of these candidate YMG members. We used this unique sample to show tentative signs of mass segregation in the AB Doradus moving group and the Tucana-Horologium and Columba associations. The BASS sample has already been successful in identifying several new young brown dwarfs in earlier publications, and will be of great interest in studying the initial mass function of YMGs and for the search of exoplanets by direct imaging; the input sample of potential close-by ?M5 dwarfs will be useful to study the kinematics of low-mass stars and brown dwarfs and search for new proper motion pairs.

  18. AN INFRARED CENSUS OF DUST IN NEARBY GALAXIES WITH SPITZER (DUSTiNGS). II. DISCOVERY OF METAL-POOR DUSTY AGB STARS

    SciTech Connect

    Boyer, Martha L.; Sonneborn, George; McQuinn, Kristen B. W.; Gehrz, Robert D.; Skillman, Evan; Barmby, Pauline; Bonanos, Alceste Z.; Gordon, Karl D.; Meixner, Margaret; Groenewegen, M. A. T.; Lagadec, Eric; Lennon, Daniel; Marengo, Massimo; McDonald, Iain; Zijlstra, Albert; Sloan, G. C.; Van Loon, Jacco Th.

    2015-02-10

    The DUSTiNGS survey (DUST in Nearby Galaxies with Spitzer) is a 3.6 and 4.5 μm imaging survey of 50 nearby dwarf galaxies designed to identify dust-producing asymptotic giant branch (AGB) stars and massive stars. Using two epochs, spaced approximately six months apart, we identify a total of 526 dusty variable AGB stars (sometimes called ''extreme'' or x-AGB stars; [3.6]-[4.5] > 0.1 mag). Of these, 111 are in galaxies with [Fe/H] < –1.5 and 12 are in galaxies with [Fe/H] < –2.0, making them the most metal-poor dust-producing AGB stars known. We compare these identifications to those in the literature and find that most are newly discovered large-amplitude variables, with the exception of ≈30 stars in NGC 185 and NGC 147, 1 star in IC 1613, and 1 star in Phoenix. The chemical abundances of the x-AGB variables are unknown, but the low metallicities suggest that they are more likely to be carbon-rich than oxygen-rich and comparisons with existing optical and near-IR photometry confirm that 70 of the x-AGB variables are confirmed or likely carbon stars. We see an increase in the pulsation amplitude with increased dust production, supporting previous studies suggesting that dust production and pulsation are linked. We find no strong evidence linking dust production with metallicity, indicating that dust can form in very metal-poor environments.

  19. A Collection of Features for Semantic Graphs

    SciTech Connect

    Eliassi-Rad, T; Fodor, I K; Gallagher, B

    2007-05-02

    Semantic graphs are commonly used to represent data from one or more data sources. Such graphs extend traditional graphs by imposing types on both nodes and links. This type information defines permissible links among specified nodes and can be represented as a graph commonly referred to as an ontology or schema graph. Figure 1 depicts an ontology graph for data from National Association of Securities Dealers. Each node type and link type may also have a list of attributes. To capture the increased complexity of semantic graphs, concepts derived for standard graphs have to be extended. This document explains briefly features commonly used to characterize graphs, and their extensions to semantic graphs. This document is divided into two sections. Section 2 contains the feature descriptions for static graphs. Section 3 extends the features for semantic graphs that vary over time.

  20. Feature recognition applications in mesh generation

    SciTech Connect

    Tautges, T.J.; Liu, S.S.; Lu, Y.; Kraftcheck, J.; Gadh, R.

    1997-06-01

    The use of feature recognition as part of an overall decomposition-based hexahedral meshing approach is described in this paper. The meshing approach consists of feature recognition, using a c-loop or hybrid c-loop method, and the use of cutting surfaces to decompose the solid model. These steps are part of an iterative process, which proceeds either until no more features can be recognized or until the model has been completely decomposed into meshable sub-volumes. This method can greatly reduce the time required to generate an all-hexahedral mesh, either through the use of more efficient meshing algorithms on more of the geometry or by reducing the amount of manual decomposition required to mesh a volume.

  1. Supai salt karst features: Holbrook Basin, Arizona

    SciTech Connect

    Neal, J.T.

    1994-12-31

    More than 300 sinkholes, fissures, depressions, and other collapse features occur along a 70 km (45 mi) dissolution front of the Permian Supai Formation, dipping northward into the Holbrook Basin, also called the Supai Salt Basin. The dissolution front is essentially coincident with the so-called Holbrook Anticline showing local dip reversal; rather than being of tectonic origin, this feature is likely a subsidence-induced monoclinal flexure caused by the northward migrating dissolution front. Three major areas are identified with distinctive attributes: (1) The Sinks, 10 km WNW of Snowflake, containing some 200 sinkholes up to 200 m diameter and 50 m depth, and joint controlled fissures and fissure-sinks; (2) Dry Lake Valley and contiguous areas containing large collapse fissures and sinkholes in jointed Coconino sandstone, some of which drained more than 50 acre-feet ({approximately}6 {times} 10{sup 4} m{sup 3}) of water overnight; and (3) the McCauley Sinks, a localized group of about 40 sinkholes 15 km SE of Winslow along Chevelon Creek, some showing essentially rectangular jointing in the surficial Coconino Formation. Similar salt karst features also occur between these three major areas. The range of features in Supai salt are distinctive, yet similar to those in other evaporate basins. The wide variety of dissolution/collapse features range in development from incipient surface expression to mature and old age. The features began forming at least by Pliocene time and continue to the present, with recent changes reportedly observed and verified on airphotos with 20 year repetition. The evaporate sequence along interstate transportation routes creates a strategic location for underground LPG storage in leached caverns. The existing 11 cavern field at Adamana is safely located about 25 miles away from the dissolution front, but further expansion initiatives will require thorough engineering evaluation.

  2. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    September 11, 2009 [Feature Stories and Releases] Open House Draws Crowd to ARM Climate Research Facility Display Bookmark and Share Mild summer temperatures helped bring thousands of visitors through the gates of Argonne National Laboratory on August 29 for an open house, which featured a display about the ARM Climate Research Facility. Located in one of six very large tents in the middle of the Argonne campus, the display occupied about 50 feet by 30 feet-nearly ¼ of the tent space. Doug

  3. New Features of the Edison XC30

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    New Features of the Edison XC30 New Features of the Edison XC30 While the Edison and Hopper systems have similar programming environments and software, there are some key architectural differences between the two systems. This page describes those differences. Compute nodes Edison and Hopper both have a total of 24 cores on each compute node. Edison, like Hopper, has two sockets on each compute node, but instead of four "NUMA" memory domains, Edison has only two. Edison uses Intel

  4. General features of Hugoniots-II

    SciTech Connect

    Johnson, J.D.

    1997-01-01

    The author has derived a differential version of the Principal Hugoniot jump relations for a shock wave. From this algebraic equation, relating equation of state and U{sub s} - U{sub p} Hugoniot variables, I explain the general features of the Hugoniot, including two regions of linearity, limiting forms, and insensitivity to shell structure.

  5. Fizzy. Feature subset selection for metagenomics

    SciTech Connect

    Ditzler, Gregory; Morrison, J. Calvin; Lan, Yemin; Rosen, Gail L.

    2015-11-04

    Background: Some of the current software tools for comparative metagenomics provide ecologists with the ability to investigate and explore bacterial communities using α– & β–diversity. Feature subset selection – a sub-field of machine learning – can also provide a unique insight into the differences between metagenomic or 16S phenotypes. In particular, feature subset selection methods can obtain the operational taxonomic units (OTUs), or functional features, that have a high-level of influence on the condition being studied. For example, in a previous study we have used information-theoretic feature selection to understand the differences between protein family abundances that best discriminate between age groups in the human gut microbiome. Results: We have developed a new Python command line tool, which is compatible with the widely adopted BIOM format, for microbial ecologists that implements information-theoretic subset selection methods for biological data formats. We demonstrate the software tools capabilities on publicly available datasets. Conclusions: We have made the software implementation of Fizzy available to the public under the GNU GPL license. The standalone implementation can be found at http://github.com/EESI/Fizzy.

  6. Fizzy. Feature subset selection for metagenomics

    DOE PAGES [OSTI]

    Ditzler, Gregory; Morrison, J. Calvin; Lan, Yemin; Rosen, Gail L.

    2015-11-04

    Background: Some of the current software tools for comparative metagenomics provide ecologists with the ability to investigate and explore bacterial communities using α– & β–diversity. Feature subset selection – a sub-field of machine learning – can also provide a unique insight into the differences between metagenomic or 16S phenotypes. In particular, feature subset selection methods can obtain the operational taxonomic units (OTUs), or functional features, that have a high-level of influence on the condition being studied. For example, in a previous study we have used information-theoretic feature selection to understand the differences between protein family abundances that best discriminate betweenmore » age groups in the human gut microbiome. Results: We have developed a new Python command line tool, which is compatible with the widely adopted BIOM format, for microbial ecologists that implements information-theoretic subset selection methods for biological data formats. We demonstrate the software tools capabilities on publicly available datasets. Conclusions: We have made the software implementation of Fizzy available to the public under the GNU GPL license. The standalone implementation can be found at http://github.com/EESI/Fizzy.« less

  7. Geothermal Energy Featured on NBC's Today Show

    Energy.gov [DOE]

    In Iceland, there are five major geothermal power plants which produce about 26% (2006) of the country's electricity. In addition, geothermal heating meets the heating and hot water requirements for around 87% of the nation's buildings. As part of its "Ends of the Earth" series, NBC's Today Show presented a feature on the use of geothermal energy in Iceland.

  8. Semantic Features for Classifying Referring Search Terms

    SciTech Connect

    May, Chandler J.; Henry, Michael J.; McGrath, Liam R.; Bell, Eric B.; Marshall, Eric J.; Gregory, Michelle L.

    2012-05-11

    When an internet user clicks on a result in a search engine, a request is submitted to the destination web server that includes a referrer field containing the search terms given by the user. Using this information, website owners can analyze the search terms leading to their websites to better understand their visitors needs. This work explores some of the features that can be used for classification-based analysis of such referring search terms. We present initial results for the example task of classifying HTTP requests countries of origin. A system that can accurately predict the country of origin from query text may be a valuable complement to IP lookup methods which are susceptible to the obfuscation of dereferrers or proxies. We suggest that the addition of semantic features improves classifier performance in this example application. We begin by looking at related work and presenting our approach. After describing initial experiments and results, we discuss paths forward for this work.

  9. VERY LONG BASELINE ARRAY IMAGING OF PARSEC-SCALE RADIO EMISSIONS IN NEARBY RADIO-QUIET NARROW-LINE SEYFERT 1 GALAXIES

    SciTech Connect

    Doi, Akihiro; Asada, Keiichi; Inoue, Makoto; Fujisawa, Kenta; Nagai, Hiroshi; Hagiwara, Yoshiaki; Wajima, Kiyoaki

    2013-03-01

    We conducted Very Long Baseline Array (VLBA) observations of seven nearby narrow-line Seyfert 1 (NLS1) galaxies at 1.7 GHz ({lambda}18 cm) with milliarcsecond resolution. This is the first systematic very long baseline interferometry study focusing on the central parsec-scale regions of radio-quiet NLS1s. Five of the seven were detected at a brightness temperature of {approx}> 5 Multiplication-Sign 10{sup 6} K and contain radio cores with high brightness temperatures of >6 Multiplication-Sign 10{sup 7} K, indicating a nonthermal process driven by jet-producing central engines as in radio-loud NLS1s and other active galactic nucleus classes. VLBA images of MRK 1239, MRK 705, and MRK 766 exhibit parsec-scale jets with clear linear structures. A large portion of the radio power comes from diffuse emission components that are distributed within the nuclear regions ({approx}< 300 pc), which is a common characteristic throughout the observed NLS1s. Jet kinetic powers limited by the Eddington limit may be insufficient to allow the jets to escape to kiloparsec scales for these radio-quiet NLS1s with low-mass black holes of {approx}< 10{sup 7} M {sub Sun }.

  10. NREL Open House Features Energy Activities, Tours

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Open House Features Energy Activities, Tours For more information contact: e:mail: Public Affairs Golden, Colo., July 8, 1999 — Discover the power of clean energy at the nation's premier laboratory for renewable energy and energy efficiency research, development and deployment. The U.S. Department of Energy's National Renewable Energy Laboratory (NREL) will open its doors 10 a.m. to 3 p.m., Saturday, July 24 for tours of its research facilities and interactive exhibits at the Visitors Center.

  11. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    April 2, 2007 [Feature Stories and Releases] ARM Mobile Facility Begins Precipitation Investigation in the Black Forest Bookmark and Share Raindrops to reveal clues about climate in complex terrain Contact: Lynne Roeder, ARM Public Information Officer, 509.372.4331 Beginning today, the ARM Mobile Facility will collect data for 9 months in support of a long-term precipitation study in the Black Forest region of Germany. Requested by researchers at the University of Hohenheim, the facility is one

  12. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    February 26, 2007 [Feature Stories and Releases] Arctic Winter Provides Window of Opportunity to Improve Climate Models Bookmark and Share Dry winter conditions allows scientists to explore elusive portions of the electromagnetic spectrum Contact: Lynne Roeder, 509.372.4331 In conjunction with other scientific activities taking place during International Polar Year 2007-2008, today an international research team begins a three-week field campaign in Barrow, Alaska. The experiment, which is

  13. ARM - Feature Stories and Releases Article

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    November 16, 2010 [Feature Stories and Releases] Future Field Campaigns Span Atlantic Ocean to Indian Ocean Bookmark and Share Each year, the ARM Climate Research Facility reviews proposals to use key components of the Facility for extended field campaigns. The Department of Energy recently announced the selection of major ARM field campaigns that will take place from 2011 through 2014. Studies led by principal investigators Chuck Long, Carl Berkowitz, and Scot Martin will examine atmospheric

  14. ARM - Feature Stories and Releases Article

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    December 9, 2010 [Feature Stories and Releases] Scientists Begin 5-month Study of Cloud Life Cycles Bookmark and Share Instruments at four mountain sites gather data to improve climate models. For Immediate Release: Thursday, December 9, 2010 Just outside Thunderhead Lodge in the Steamboat Springs ski area, one of the ARM Mobile Facility sites hosts a scanning cloud radar and several other instruments. Just outside Thunderhead Lodge in the Steamboat Springs ski area, one of the ARM Mobile

  15. ARM - Feature Stories and Releases Article

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    4, 2006 [Feature Stories and Releases] Tropical Cloud Study Concludes; Science Students Play Key Role Bookmark and Share Press Release Media Contact: Lynne Roeder, 509.372.4331 Three and a half weeks after it started, the Tropical Warm Pool International Cloud Experiment has resulted in one of the most comprehensive data sets of tropical cloud properties ever collected. Co-led by scientist from the U.S. Department of Energy's Atmospheric Radiation Measurement (ARM) Program and the Australian

  16. ARM - Feature Stories and Releases Article

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    January 12, 2006 [Feature Stories and Releases] U.S. Climate Scientists Join Collaborators in Australia to Begin Tropical Cloud Experiment Bookmark and Share Media Advisory Media Contact: Lynne Roeder, 509.372.4331 More than 100 researchers from around the world are gathering in Darwin, Australia, as they prepare to launch simultaneous ground, sea and sky operations during the Tropical Warm Pool International Cloud Experiment. The experiment, organized jointly by the U.S. Department of Energy

  17. ARM - Feature Stories and Releases Article

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    8, 2005 [Feature Stories and Releases] International Climate Researchers Meet in U.S. to Simulate Flight Operations for Tropical Storm Cloud Experiment Bookmark and Share Press Release Media Contact: Lynne Roeder, 509.372.4331 Technical Contact: Mike Janes, 925.294.2447 The Southern Surveyor research vessel will be equipped with a full compliment of surface-based instrumentation for measuring atmospheric and oceanographic properties. The ship will also serve as one of the locations for launching

  18. ARM - Feature Stories and Releases Article

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    1, 2005 [Feature Stories and Releases] Climate Scientists Gather at Sandia National Laboratories to Simulate Tropical Cloud Experiment Bookmark and Share Media Advisory Media Contact: Lynne Roeder, 509.372.4331 Technical Contact: Mike Janes, 925.294.2447 The ARM Program-the Department of Energy's largest global change research program-was created to help resolve scientific uncertainties related to global climate change. Its specific focus is on the crucial role of clouds and their influence on

  19. ARM - Feature Stories and Releases Article

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    28, 2011 [Feature Stories and Releases] Storm Study in Oklahoma Records Extreme Weather Events Bookmark and Share During MC3E, convective clouds like these were measured by NASA research aircraft and numerous radars throughout the ARM Southern Great Plains site, including these radars at the SGP Central Facility. During MC3E, convective clouds like these were measured by NASA research aircraft and numerous radars throughout the ARM Southern Great Plains site, including these radars at the SGP

  20. ARM - Feature Stories and Releases Article

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    September 28, 2011 [Facility News, Feature Stories and Releases, Publications] Pass the lotion; new study shows drying trend over Great Plains Bookmark and Share Analysis of infrared energy levels useful for similar evaluations at local scale Illustration of seasonal infrared energy trends observed at the ARM Southern Great Plains site between 1996 and 2010. Click on image to enlarge. Illustration of seasonal infrared energy trends observed at the ARM Southern Great Plains site between 1996 and

  1. ARM - Feature Stories and Releases Article

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    August 1, 2005 [Feature Stories and Releases] Connection Between Clouds and Climate Highlighted in a Special Section of Scientific Journal Bookmark and Share Press Release Media Contact: Lynne Roeder, 509.372.4331 A key uncertainty in computer simulations of climate change is the broad range of cloud-climate feedback processes. Natural phenomena that occur in cloud lifecycles present a difficult challenge to scientists studying how dynamic cloud conditions affect the sun's incoming and Earth's

  2. ARM - Feature Stories and Releases Article

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    1, 2011 [Feature Stories and Releases] Aloha! Mobile Facility to Sail the Pacific; Southern Great Plains Hosts Aerosol and Carbon Campaigns Bookmark and Share Each year, the ARM Climate Research Facility reviews proposals to use key components of the Facility for extended or intensive field campaigns. The Department of Energy recently announced the selection of new field campaigns that will take place from 2012 through 2013. They include an investigation of marine cloud processes over the

  3. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    November 14, 2011 [Feature Stories and Releases] New Study Reveals and Quantifies Magnitude of Long-term Aerosol Effects on Clouds and Precipitation Bookmark and Share Cloud radars measure an incoming storm at the ARM Southern Great Plains site in Oklahoma. Cloud radars measure an incoming storm at the ARM Southern Great Plains site in Oklahoma. 10 years of data from ARM Southern Great Plains site corroborate satellite measurements; match model A study published in Nature Geoscience this week

  4. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    1, 2011 [Feature Stories and Releases] User Facility Highlights at AGU 2011 Fall Meeting Bookmark and Share Researchers around the world use data from the U.S. Department of Energy's Atmospheric Radiation Measurement (ARM) Climate Research Facility to study the interactions between clouds, aerosols, and radiation. At this year's American Geophysical Union Fall Meeting, ARM's scientific users are presenting dozens of oral and poster sessions describing their research using data from the user

  5. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    January 31, 2012 [Feature Stories and Releases] Expanding Horizons for Climate Research Bookmark and Share New observation sites in Arctic, Atlantic Ocean provide details of important climate regimes One of the continuing challenges for scientists trying to understand and predict the future of Earth's climate system is the lack of accurate, long-term reference data sets from the various types of climate regimes. In a few months, the U.S. Department of Energy's Atmospheric Radiation Measurement

  6. ARM - Feature Stories and Releases Article

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    3, 2012 [Feature Stories and Releases] SGP Site Staff Share Successes, Challenges in the Name of Science Bookmark and Share Large-scale observation network in Korea opens door to new collaborations Daniel Hartsock and Dr. Kyungjeen Park look on as Pat Dowell describes the operation of a disdrometer at the SGP site. A sensor under the instrument's 'hood' measures rain rate and drop size distribution. Daniel Hartsock and Dr. Kyungjeen Park look on as Pat Dowell describes the operation of a

  7. ARM - Feature Stories and Releases Article

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    7, 2012 [Facility News, Feature Stories and Releases] Aerosol Research Keeps "PACE" with Ecosystem Science Bookmark and Share The science and operations team at Los Alamos National Laboratory poses in front of the MAOS Aerosol and Chemistry units. From left to right: Kyle Gorkowski, Alison Aitken, Paul Ortega, Anna Trugman, Kim Nitschke, Manvendra Dubey, Caleb Arata and Curt Dvonch. The science and operations team at Los Alamos National Laboratory poses in front of the MAOS Aerosol and

  8. ARM - Feature Stories and Releases Article

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    July 26, 2012 [Feature Stories and Releases] Capturing Aerosol Evolution at Cape Cod Bookmark and Share From July 2012 to June 2013, nearly sixty instruments are obtaining atmospheric data from the ARM Mobile Facility site at Cape Cod National Seashore in Massachusetts. From July 2012 to June 2013, nearly sixty instruments are obtaining atmospheric data from the ARM Mobile Facility site at Cape Cod National Seashore in Massachusetts. Starting this month and lasting through June 2013, the ARM

  9. ARM - Feature Stories and Releases Article

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    August 13, 2012 [Feature Stories and Releases] Up Close and Personal at Cape Cod National Seashore Bookmark and Share Visitors make their way to the ARM Mobile Facility, located on a coastal bluff near the Highlands Center at Cape Cod National Seashore. Visitors make their way to the ARM Mobile Facility, located on a coastal bluff near the Highlands Center at Cape Cod National Seashore. Enjoying fair skies and ocean breezes, a large and enthusiastic crowd gathered at the Highlands Center at Cape

  10. ARM - Feature Stories and Releases Article

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    23, 2008 [Feature Stories and Releases] Field Campaigns for 2010 Range from the Arctic to the Azores Bookmark and Share With the recent awards, the ARM Mobile Facility deployment on Graciosa Island in the Azores is extended from its original 9-month duration, beginning in May 2009 and now lasting through November 2010. The Department of Energy recently announced the selection of major ARM field campaigns that will take place in 2010. Studies led by principal investigators Rob Wood, Hans

  11. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    29, 2013 [Feature Stories and Releases] New Field Campaigns Move Mobile Facility to Finland Forest and California Coast; Aircraft to Explore Aerosol and Gases Bookmark and Share Each year, the ARM Climate Research Facility receives proposals to use key components of the Facility for extended or intensive field campaigns to improve understanding of atmospheric processes that are relevant to regional and global climate. The Department of Energy (DOE) has selected the following new field campaigns

  12. ARM - Feature Stories and Releases Article

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    17, 2013 [Facility News, Feature Stories and Releases] Popular Science's Brilliant 10 Includes ARM Radar Meteorologist Bookmark and Share To the casual observer, radars for weather and climate research silently go about their business, sending pulses of energy into the sky to bounce off of clouds and other particles overhead. The return signals feed into a computer where they are converted to data. Simple. Scott Collis (image courtesy Argonne National Laboratory) Scott Collis (image courtesy

  13. ARM - Feature Stories and Releases Article

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    26, 2013 [Facility News, Feature Stories and Releases] Climate Data Now Flowing from Oliktok, Alaska Bookmark and Share New climate observatory records atmospheric measurements at intersection of Arctic land and sea. Instruments take atmospheric measurements from the roof of a new Department of Energy climate observation station at Oliktok Point, Alaska. More capabilities will be added in the coming year, including radars, lidars, and aerosol observing instrumentation. Instruments take

  14. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    30, 2013 [Facility News, Feature Stories and Releases] Small Footprint, Big Shoes: Stepping Out at Nauru Bookmark and Share Kim Nitschke (white shirt) joined members of the Nauru Government for a walk down memory lane at the ARM Nauru site to help commemorate the site decommissioning, recognized at a closing reception on September 23, 2013. Kim Nitschke (white shirt) joined members of the Nauru Government for a walk down memory lane at the ARM Nauru site to help commemorate the site

  15. ARM - Feature Stories and Releases Article

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    13, 2013 [Facility News, Feature Stories and Releases] Research Flights Completed for Biomass Burning Field Campaign Bookmark and Share The Gulstream-1 heads toward a smoke plume during a research flight for the Biomass Burning Observation Project. The Gulstream-1 heads toward a smoke plume during a research flight for the Biomass Burning Observation Project. In late October, the ARM Aerial Facility wrapped up a busy season of research flights for the Biomass Burning Observation Project, using a

  16. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    December 30, 2013 [Feature Stories and Releases] Pole Position: New Field Campaigns Explore Arctic and Antarctic Atmosphere Bookmark and Share Each year, the ARM Climate Research Facility receives proposals to use key components of the Facility for extended or intensive field campaigns to improve understanding of atmospheric processes that are relevant to regional and global climate. The Department of Energy has selected the following field campaigns that take place from 2014 through 2016. ARM

  17. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    March 27, 2009 [Facility News, Feature Stories and Releases] Ceremony in the Azores Recognizes Scientific Collaborations Bookmark and Share A mix of green pastures and isolated white-housed villages dot the landscape of Graciosa Island. The ARM Mobile Facility will be located near the airport at the northern end of the island. In a signing ceremony at the Laboratorio Regional Engenharia Civil in Ponta Delgada, the Azores, government officials from the United States and Portugal formally

  18. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    June 2, 2014 [Feature Stories and Releases] First Phase of Research Flights Completed for GOAMAZON Bookmark and Share Data from the condensation particle counter (CPC) onboard the Gulfstream-1 research aircraft clearly show the aerosol plume between Manaus and the ARM Mobile Facility site, or T3, at Manacapuru. Data from the condensation particle counter (CPC) onboard the Gulfstream-1 research aircraft clearly show the aerosol plume between Manaus and the ARM Mobile Facility site, or T3, at

  19. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    1, 2014 [Facility News, Feature Stories and Releases] A Richly Deserved Retirement; a Job Well Done Bookmark and Share June 30, 2014, marks another key milestone in the progress and evolution of the ARM Climate Research Facility. After 20 years of leadership, Wanda Ferrell, DOE Program Director for the ARM Facility, is retiring. Under her strong and astute guidance, what began in 1989 with a 10-year vision as an observational testbed network is now entering its third decade and going strong,

  20. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    May 13, 2009 [Feature Stories and Releases] Preparations Heat Up for Field Campaign in Chile Bookmark and Share Test period simulates daily operations for remote deployment in Atacama Desert Science and operations team members observe data transmitted from the weather balloon launched during training for RHUBC-II. Science and operations team members observe data transmitted from the weather balloon launched during training for RHUBC-II. At an elevation of more than 5000 meters on the Atacama

  1. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    November 14, 2014 [Facility News, Feature Stories and Releases] Around the World in 52 Months Bookmark and Share ARM's New Research on Climate Spans the Globe Each year, the ARM Climate Research Facility receives proposals to use key components of the Facility for extended or intensive field campaigns to improve understanding of atmospheric processes that are relevant to regional and global climate. The Department of Energy has selected six field campaigns to take place from 2015 through most of

  2. ARM - Feature Stories and Releases Article

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    9, 2015 [Facility News, Feature Stories and Releases] Seeing the Forest Through the Trees-And to the Aerosols Bookmark and Share End of the Biogenic Aerosols - Effects on Clouds and Climate Campaign in Finland Finnish scientists are measuring aerosols on branches as they grow in the boreal forests. Image courtesy of Juho Aalto. Finnish scientists are measuring aerosols on branches as they grow in the boreal forests. Image courtesy of Juho Aalto. Nine months in the icy, cold forests of Finland

  3. ARM - Feature Stories and Releases Article

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    February 3, 2015 [Facility News, Feature Stories and Releases] North Slope Megasite Preparations Take Form Bookmark and Share Third mobile facility completes first year of data collection in northern Alaska This fall, the AMF3 installation was completed with the addition of scanning and vertical-pointing radars, as well as a Raman lidar. This fall, the AMF3 installation was completed with the addition of scanning and vertical-pointing radars, as well as a Raman lidar. Another first of many to

  4. ARM - Feature Stories and Releases Article

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    February 25, 2015 [Facility News, Feature Stories and Releases] Nature Article: Carbon Dioxide's Greenhouse Effect at Earth's Surface Confirmed Using ARM Data Bookmark and Share Researchers link rising carbon dioxide levels from fossil fuels to an upward trend in radiative forcing at two locations From 2000 to the end of 2010, 3300 measurements were obtained at ARM's North Slope of Alaska site for the study. From 2000 to the end of 2010, 3300 measurements were obtained at ARM's North Slope of

  5. ARM - Feature Stories and Releases Article

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    September 14, 2015 [Feature Stories and Releases] Nocturnal Storm Chasers Collect "Fantastic" Data Set to Improve Forecasts Bookmark and Share PECAN campaign ends after scientists spend more than 30 nights monitoring storms with remote sensing instruments Approaching storm at sunset near Sawyer, Kansas, typifies the weather researchers pursued during PECAN campaign. Image courtesy of Jacob DeFlitch, Pennsylvania State University. Approaching storm at sunset near Sawyer, Kansas,

  6. ARM - Feature Stories and Releases Article

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    November 16, 2015 [Feature Stories and Releases] Taking Stock of the Atmosphere Bookmark and Share ARM-ACME VI field campaign will chart changes in greenhouse gas levels Scientists are taking air samples at different heights above the Southern Great Plains site in this Cessna 206 aircraft. Scientists are taking air samples at different heights above the Southern Great Plains site in this Cessna 206 aircraft. For the next year, a Cessna 206 aircraft from the Atmospheric Radiation Measurement

  7. ARM - Feature Stories and Releases Article

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    October 26, 2015 [Feature Stories and Releases] Delineating the Sharp Edges of Clouds, Down to the Micrometer Bookmark and Share The HOLODEC, developed in part with funding from the ARM Facility, can be flown through clouds to record three-dimensional images of the intricate workings inside. The results of a study using the instrument were recently published in Science. Photo courtesy of NCAR. The HOLODEC, developed in part with funding from the ARM Facility, can be flown through clouds to

  8. ARM - Feature Stories and Releases Article

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    November 16, 2015 [Feature Stories and Releases] Getting an Inside View of Arctic Clouds Bookmark and Share Researchers investigate the polar atmosphere's unique properties Researchers are using unmanned aerial systems to study Arctic atmospheric processes, especially where the tundra and ocean meet. Researchers are using unmanned aerial systems to study Arctic atmospheric processes, especially where the tundra and ocean meet. On the north coast of Alaska, where the barren tundra meets the icy

  9. ARM - Feature Stories and Releases Article

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    8, 2016 [Feature Stories and Releases] MAGIC Continues to Inspire Insights Bookmark and Share Data from the first extended at-sea ARM deployment are improving understanding of marine clouds Ernie Lewis, atmospheric scientist at Brookhaven National Laboratory, who led the MAGIC campaign. Image courtesy of Brookhaven National Laboratory Ernie Lewis, atmospheric scientist at Brookhaven National Laboratory, who led the MAGIC campaign. Image courtesy of Brookhaven National Laboratory Because they

  10. ARM - Feature Stories and Releases Article

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    29, 2016 [Feature Stories and Releases] Tracking Clouds Down Under Bookmark and Share ARM experiment to characterize unique properties of clouds in the Southern Ocean Macquarie Island is a remote grassy outcrop that lies about half-way between New Zealand and Antarctica. Macquarie Island is a remote grassy outcrop that lies about half-way between New Zealand and Antarctica. While penguins and seals are the main inhabitants of Macquarie Island, a remote grassy outcrop which lies about half-way

  11. ARM - Feature Stories and Releases Article

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    January 19, 2016 [Feature Stories and Releases] Scientists Study Clouds' Impact on West Antarctic Ice Melt Bookmark and Share Antarctic clouds studied for first time in five decades Heath Powers, Los Alamos National Laboratory, and Dan Lubin, AWARE lead scientist, prepare a weather balloon at WAIS Divide Ice Camp. Image courtesy of Dan Lubin. Heath Powers, Los Alamos National Laboratory, and Dan Lubin, AWARE lead scientist, prepare a weather balloon at WAIS Divide Ice Camp. Image courtesy of Dan

  12. ARM - Feature Stories and Releases Article

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    May 23, 2016 [Feature Stories and Releases] Smoke From African Fires: Studying its Impact on Low Clouds Bookmark and Share New 17-month ARM campaign investigates airborne carbonaceous particles Beginning June 1, the first ARM Mobile Facility is deployed to Ascension Island in the southeast Atlantic Ocean to study how smoke transported from biomass burning in Southern Africa effects low-hanging clouds. Beginning June 1, the first ARM Mobile Facility is deployed to Ascension Island in the

  13. ARM - Feature Stories and Releases Article

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    August 15, 2016 [Feature Stories and Releases] Spying on Thin Ice Clouds Bookmark and Share Experiment seeks to elucidate impacts of unique polar clouds Observations of thin ice clouds are scarce, contributing to a large range of uncertainties in present-day and future simulations of the polar climates. Data from TICFIRE and ARM's Barrow facility will help to develop a new spaced-based instrument to measure these thin ice clouds. Observations of thin ice clouds are scarce, contributing to a

  14. ARM - Feature Stories and Releases Article

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    June 30, 2005 [Feature Stories and Releases] New Mobile Atmospheric Laboratory Gathering Weather and Climate Change Data on the California Coast Bookmark and Share Are Aerosols Reducing Coastal Drizzle and Increasing Cloud Cover? Scientists sponsored by the Department of Energy (DOE) are conducting a six-month atmospheric research campaign at the Point Reyes National Seashore, in Marin County, California. The experiment's goal is to help researchers understand how aerosols-small particles such

  15. ARM - Feature Stories and Releases Article

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    7, 2007 [Feature Stories and Releases] Researchers Combine Atmospheric Science with Heartland Farming Bookmark and Share Field studies use aircraft, satellite and ground-based sensors to examine effects of land use on regional climate This week, two major scientific field studies begin in Oklahoma to investigate major uncertainties in climate models-aerosols and clouds. Both campaigns are focused on fair weather clouds, but one is studying the influence of land surface changes, such as soil

  16. ARM - Feature Stories and Releases Article

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    4, 2007 [Feature Stories and Releases] Climate Scientists Air Their Views in Oklahoma Bookmark and Share Media and distinguished guests are invited to talk with top U.S. climate scientists and view the research aircraft and field instrumentation that is critical to their studies. The scientists are in Oklahoma to conduct two studies focused on the interactions between clouds, aerosols and surface moisture, and their influence on regional climate. Oklahoma was chosen due to the desired cloud

  17. ARM - Feature Stories and Releases Article

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    19, 2016 [Feature Stories and Releases] ARM Principal Investigator Quoted in Science Bookmark and Share LASIC principal investigator was quoted in a Science news story about African smoke and ocean clouds. Paquita Zuidema, University of Miami Paquita Zuidema, University of Miami Science magazine quoted Paquita Zuidema, University of Miami, in her role as lead scientist for ARM's Layered Atlantic Smoke Interactions with Clouds (LASIC) campaign. Published August 25, "NASA Aircraft Probe

  18. ARM - Feature Stories and Releases Article

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    August 27, 2008 [Feature Stories and Releases] Argonne National Laboratory Wins Award for Ocean-Going Climate Observatory Bookmark and Share Mobile facility to provide key data about atmosphere/ocean interface for use in climate models. Contact: Lynne Roeder, ARM Public Information Officer, 509.372.4331 The U.S. Department of Energy's Office of Science has awarded Argonne National Laboratory a $2.6 million/year contract to design, build, and operate a mobile laboratory for obtaining cloud and

  19. ARM - Feature Stories and Releases Article

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    8, 2009 [Facility News, Feature Stories and Releases] Thumbs-Up for Radar Design Reviews-Key Recovery Act Milestone Bookmark and Share Of the $60 million allocated to the ARM Climate Research Facility by the American Recovery and Reinvestment Act, nearly half that amount is designated for 18 new scanning radars as well as upgrades to the baseline ARM millimeter wave cloud radars (MMCR) located throughout the Facility. In November, ARM engineering staff led a series of preliminary design reviews

  20. ARM - Feature Stories and Releases Article

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    , 2010 [Feature Stories and Releases] Field Campaign Begins in Sacramento to Study Aging Aerosols Bookmark and Share Scientists will use measurements from the CARES campaign to examine how various gases and aerosol particles evolve and mix during the course of a day. Starting this week, dozens of researchers are on location in Sacramento for the Carbonaceous Aerosol and Radiative Effects Study, or CARES. Using a combination of more than 50 instruments at two ground sites and on two aircraft, the

  1. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    December 11, 2007 [Feature Stories and Releases] National User Facility Leads to Multidisciplinary Climate Research Bookmark and Share Contact: Lynne Roeder, ARM Public Information Officer, 509.372.4331 Onsite: Booth 328/330 ARM Climate Research Facility Sites Exhibit Showcases User Facility, Science, and Real-time Data Equipped with state-of-the-art instrumentation and data systems, the Department of Energy's ARM Climate Research Facility provides permanent research sites around the world for

  2. ARM - Feature Stories and Releases Article

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    19, 2007 [Feature Stories and Releases] Marked Improvements Shown in Global Weather Forecast Model Bookmark and Share Contact: Lynne Roeder, ARM Public Information Officer, 509.372.4331 Example of an ECMWF analysis. One of the world's foremost weather forecast models is showing dramatic improvements thanks to the pairing of two recent advancements in the representation of radiative transfer in global weather and climate models. Developed with funding from the Atmospheric Radiation Measurement

  3. Latest Feature Video | The Ames Laboratory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Latest Feature Video Sensitive Instrument Facility Dedication Secretary of Energy Ernest Moniz helped cut the ribbon to dedicate Ames Laboratory's Sensitive Instrument Facility on May 6, 2016. Anderson named to National Academy of Inventors Ames Laboratory senior metallurgist and 2015 National Academy of Inventors inductee, Iver Anderson, talks about being an inventor and having the drive to solve problems, using information from many different sources. CCI Virtual Tour Daniel Bouk, a student in

  4. Structural features of dielectric oxide laser ceramics

    SciTech Connect

    Kaminskii, Alexandr A; Taranov, A V; Khazanov, E N; Akchurin, M Sh

    2012-10-31

    The relation between the transport characteristics of subterahertz thermal phonons and the structural features of singlephase dielectric crystalline laser ceramics based on cubic oxides synthesised in different technological regimes is studied. The effect of plastic deformation on the formation of the grain structure and intergrain layers (boundaries), as well as on the thermophysical, acoustic, optical, and laser characteristics of the materials is analysed. (active media)

  5. Special Feature: Five Questions for Sudip Dosanjh

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Five Questions for Sudip Dosanjh Special Feature: Five Questions for Sudip Dosanjh September 27, 2013 Sudip-wide.jpg Sudip Dosanjh Sudip Dosanjh is Director of the National Energy Research Scientific Computing (NERSC) Center at Lawrence Berkeley National Laboratory. NERSC's mission is to accelerate scientific discovery at the U.S. Department of Energy's Office of Science through high performance computing and extreme data analysis. NERSC deploys leading-edge computational and data resources for

  6. Special Feature: Supercomputers Map Our Changing Climate

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    Supercomputers Map Our Changing Climate Special Feature: Supercomputers Map Our Changing Climate September 23, 2013 Contact: Jon Bashor, jbashor@lbl.gov, 510-486-5849 cam5-hurricane-2145950x400.jpg In this simulation, Berkeley researchers used the finite volume version of NCAR's Community Atmosphere Model to see how well the model can reproduced observed tropical cyclone statistics. The simulated storms seen in this animation are generated spontaneously from the model's simulated weather

  7. Fall Lectures Feature Life of Einstein; Exploring Our World With...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Fall Lectures Feature Life of Einstein; Exploring Our World With Particle Accelerators Fall Lectures Feature Life of Einstein; Exploring Our World With Particle Accelerators ...

  8. Startup Design Features for Supercritical Power Conversion Systems...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Find More Like This Return to Search Startup Design Features for Supercritical Power ... DescriptionThe new design features and procedures will improve the already advanced ...

  9. Category:Modern Geothermal Features | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Modern Geothermal Features Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Category:Modern Geothermal Features Geothermalpower.jpg Looking for the Modern Geothermal...

  10. Sandia Research Featured on Journal of Physical Chemistry A Cover

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    Featured on Journal of Physical Chemistry A Cover - Sandia Energy Energy Search Icon ... Sandia Research Featured on Journal of Physical Chemistry A Cover HomeEnergy, Materials ...

  11. ARM - Feature Stories and Releases Article

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    May 15, 2007 [Feature Stories and Releases] It's a Bird, It's a Plane, It's a...Helicopter? Bookmark and Share Duke University's "Jet Ranger" is one of eight aircraft that will fly over the SGP site in June. Last week, scientists from across the country met in Ponca City, Oklahoma, to simulate flight and mission planning scenarios in preparation for two simultaneous field campaigns that will occur in June at the ARM Climate Research Facility's Southern Great Plains (SGP) site. Their

  12. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    , 2011 [Feature Stories and Releases] AMIE, What You Wanna Do? Bookmark and Share Data spanning the Maldives to Papua New Guinea will help scientists analyze far-reaching tropical weather cycle This view shows a subset of the ARM Mobile Facility instruments operating at the Gan Island airport for the AMIE campaign. To see the complete collection, see the image set in Flickr. This view shows a subset of the ARM Mobile Facility instruments operating at the Gan Island airport for the AMIE campaign.

  13. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    8, 2011 [Feature Stories and Releases] The World's Largest Radar Laboratory Bookmark and Share New suite of scanning radars document life and death of clouds For Immediate Release: Thursday, December 8, 2011 Deployed in pairs, the new scanning cloud radars share a common pedestal and can scan 180 degrees in every direction. To see the radars in motion, view <a href='http://www.youtube.com/watch?v=137V1cczMt4\'>this video</a>. Deployed in pairs, the new scanning cloud radars share a

  14. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    8, 2012 [Feature Stories and Releases] AMIE Comes to an End on Manus and Gan Islands Bookmark and Share Data collected from the two island sites during AMIE indicate MJO events occurred every 30-40 days. Each system took about 10 days to build eastward from Gan to Manus. Three MJO events occurred during the campaign, with another system developing as the campaign came to a close. Data collected from the two island sites during AMIE indicate MJO events occurred every 30-40 days. Each system took

  15. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    7, 2012 [Feature Stories and Releases] Southern Great Plains Site in Path of Tornado Bookmark and Share Property of several SGP site personnel took a hit during the April 30 tornado. Site operations manager John Schatz shared this photo of damage to and around his barn. Property of several SGP site personnel took a hit during the April 30 tornado. Site operations manager John Schatz shared this photo of damage to and around his barn. On April 30, at about 10:30 p.m, a tornado touched down in

  16. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    3, 2013 [Facility News, Feature Stories and Releases] Cloud Cocktail Melts Greenland Ice Sheet Bookmark and Share Like the partygoer that just won't leave, low-level clouds hang around and cause temperatures to rise Not all clouds are created equal-especially in the Arctic. New research published in the journal Nature shows that low-level clouds in Greenland that contain just the right amount of water are thick enough to block heat from escaping to space, but thin enough to allow sunlight to

  17. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    18, 2014 [Feature Stories and Releases] A New Species in the Amazon Rain Forest: Scientists Bookmark and Share Covering 5.5 million square kilometers, the sheer size of the Amazon rain forest has a strong impact on climate in the Southern Hemisphere and is a primary driver of global atmospheric circulation. Covering 5.5 million square kilometers, the sheer size of the Amazon rain forest has a strong impact on climate in the Southern Hemisphere and is a primary driver of global atmospheric

  18. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    9, 2014 [Facility News, Feature Stories and Releases] Sally McFarlane Named DOE ARM Program Manager Bookmark and Share Sally McFarlane rejoins the ARM team as the new DOE ARM Facility Program Manager, replacing Wanda Ferrell who retired June 30. Sally McFarlane rejoins the ARM team as the new DOE ARM Facility Program Manager, replacing Wanda Ferrell who retired June 30. On July 1, Dr. Sally McFarlane took a new role in the U.S. Department of Energy as the program manager for the Atmospheric

  19. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    August 27, 2014 [Facility News, Feature Stories and Releases] Heartfelt Goodbye to Manus Island Bookmark and Share Kim Nitschke opened with a thank you speech at the closeout dinner reception in Manus. Kim Nitschke opened with a thank you speech at the closeout dinner reception in Manus. After 18 years, the U.S. Department of Energy's ARM observation site at Manus Island is closed, but the data results will live on. Observations from Manus-freely available in the ARM Data Archive-will play a

  20. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    3, 2015 [Feature Stories and Releases] Land, Sea, and Air: ACAPEX Targets Atmospheric Rivers Bookmark and Share Researchers collect rare data linked to rain and drought From left to right: The G-IV, P-3, and G-1 aircraft at McClellan Airfield in Sacramento, California, prepare for a coordinated flight mission. Photo courtesy of Marty Ralph, Scripps Institution of Oceanography at University California, San Diego. From left to right: The G-IV, P-3, and G-1 aircraft at McClellan Airfield in

  1. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    22, 2015 [Feature Stories and Releases] Sleepless on the Great Plains Bookmark and Share Scientists will collect atmospheric data between sunset and 6:00 a.m. during the 25 targeted nights of the PECAN field campaign, weather permitting. Scientists will collect atmospheric data between sunset and 6:00 a.m. during the 25 targeted nights of the PECAN field campaign, weather permitting. PECAN researchers to pull all-nighters studying storms More than 100 researchers and dozens of support staff will

  2. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    June 8, 2015 [Facility News, Feature Stories and Releases] North to Alaska: Researchers Rush to Understand Warming Trend Bookmark and Share ARM-ACME V field campaign makes first science flight June 4 ARM-ACME V researchers are studying populations of liquid droplets and ice crystals in clouds such these seen above the arctic tundra at the ARM Facility at Oliktok Point. ARM-ACME V researchers are studying populations of liquid droplets and ice crystals in clouds such these seen above the arctic

  3. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    9, 2009 [Feature Stories and Releases] RACORO Campaign Comes to a Close Bookmark and Share The workhorse for the RACORO field campaign, the CIRPAS Twin Otter, comes in for a landing after completing a research flight. The workhorse for the RACORO field campaign, the CIRPAS Twin Otter, comes in for a landing after completing a research flight. "Wheels down." That's the term pilots use to log the end of their flight. After five months, the Routine AAF CLOWD Optical Radiative

  4. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    24, 2015 [Feature Stories and Releases] Partnerships Put the "Go" in the GoAmazon 2014/15 Campaign Bookmark and Share Support of Brazilian Partners is Indispensable in Making the Campaign Viable Capable of taking measurements as high as 23,000 feet, the ARM Aerial Facility G-1 aircraft contributed to what will be a data set like Capable of taking measurements as high as 23,000 feet, the ARM Aerial Facility G-1 aircraft contributed to what will be a data set like "no other,"

  5. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    October 5, 2015 [Feature Stories and Releases] Icy Arctic Proves Hot for Climate Data Bookmark and Share ARM-ACME V wraps-up field campaign in Alaska ARM-ACME V Principal Investigator Sébastien Biraud in the cabin of the G-1 aircraft next to the greenhouse-gas-monitoring instruments. Image courtesy of John Hubbe, AAF Payload Director. ARM-ACME V Principal Investigator Sébastien Biraud in the cabin of the G-1 aircraft next to the greenhouse-gas-monitoring instruments. Image courtesy of John

  6. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    December 7, 2015 [Feature Stories and Releases] MC3E: A Legacy of Learning Bookmark and Share Four years after the field research campaign ended, data are yielding the secrets of storms Storm clouds over the C-SAPR, a dual-polarization Doppler radar used in the June 2011 MC3E field campaign. Storm clouds over the C-SAPR, a dual-polarization Doppler radar used in the June 2011 MC3E field campaign. Large storm clouds influence the Earth's climate system by redistributing heat and moisture in the

  7. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    May 23, 2016 [Feature Stories and Releases] 25 Years of ARM Shows Benefits of Having Heads in the Clouds Bookmark and Share How ARM transformed the culture of atmospheric science This is the first article in a series about the first 25 years of the ARM Climate Research Facility. ARM Timeline A monograph published online this spring by the American Meteorological Society tells the history-25 years of it so far-of what is now called the Atmospheric Radiation Measurement (ARM) Climate Research

  8. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    March 31, 2008 [Feature Stories and Releases] Aerosols and Clouds: A Complex Climate Connection Bookmark and Share New data will help researchers examine cloud composition and resulting effects on climate cycles Contact: Lynne Roeder, ARM Public Information Officer, 509.372.4331 Clouds are more than just interesting shapes in the sky. They modulate the atmosphere that allows us to live and breathe. But what recipe does the sky follow that combines just the right amount-and type-of clouds to keep

  9. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    May 6, 2010 [Facility News, Feature Stories and Releases] Ceilometer Represents First Deployment of New Ground-based Instruments from Recovery Act Bookmark and Share After a 3-day period of side-by-side operations and acceptance testing, the new CL31 ceilometer (foreground) officially replaced the older CT25K model on April 16, 2010 at the SGP site. After a 3-day period of side-by-side operations and acceptance testing, the new CL31 ceilometer (foreground) officially replaced the older CT25K

  10. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    9, 2010 [Feature Stories and Releases] Mobile Facility Completes First Test at Sea Bookmark and Share Rich Coulter and Brad Orr, co-managers for the AMF2, install instruments on the bow of the RV Connecticut for operational testing in June. In mid-June, the second ARM Mobile Facility, or AMF2, faced its first test on the open seas off the coast of Cape Cod, Massachusetts. Led by Rich Coulter, AMF2 co-manager from Argonne National Laboratory, the AMF2 team installed a subset of AMF2 instruments

  11. ARM - Feature Stories and Releases Article

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    24, 2010 [Feature Stories and Releases] CARES Campaign Comes to a Close in California Bookmark and Share Preparing for a coordinated research flight, the Gulfstream-1 and NASA King Air B-200 stay cool on the ramp, while immediately behind them, the NOAA Twin Otter taxis out to the runway. Photo courtesy of Rahul Zaveri. Preparing for a coordinated research flight, the Gulfstream-1 and NASA King Air B-200 stay cool on the ramp, while immediately behind them, the NOAA Twin Otter taxis out to the

  12. ENGINEERED BARRIER SYSTEM FEATURES, EVENTS AND PROCESSES

    SciTech Connect

    Jaros, W.

    2005-08-30

    The purpose of this report is to evaluate and document the inclusion or exclusion of engineered barrier system (EBS) features, events, and processes (FEPs) with respect to models and analyses used to support the total system performance assessment for the license application (TSPA-LA). A screening decision, either Included or Excluded, is given for each FEP along with the technical basis for exclusion screening decisions. This information is required by the U.S. Nuclear Regulatory Commission (NRC) at 10 CFR 63.114 (d, e, and f) [DIRS 173273]. The FEPs addressed in this report deal with those features, events, and processes relevant to the EBS focusing mainly on those components and conditions exterior to the waste package and within the rock mass surrounding emplacement drifts. The components of the EBS are the drip shield, waste package, waste form, cladding, emplacement pallet, emplacement drift excavated opening (also referred to as drift opening in this report), and invert. FEPs specific to the waste package, cladding, and drip shield are addressed in separate FEP reports: for example, ''Screening of Features, Events, and Processes in Drip Shield and Waste Package Degradation'' (BSC 2005 [DIRS 174995]), ''Clad Degradation--FEPs Screening Arguments (BSC 2004 [DIRS 170019]), and Waste-Form Features, Events, and Processes'' (BSC 2004 [DIRS 170020]). For included FEPs, this report summarizes the implementation of the FEP in the TSPA-LA (i.e., how the FEP is included). For excluded FEPs, this analysis provides the technical basis for exclusion from TSPA-LA (i.e., why the FEP is excluded). This report also documents changes to the EBS FEPs list that have occurred since the previous versions of this report. These changes have resulted due to a reevaluation of the FEPs for TSPA-LA as identified in Section 1.2 of this report and described in more detail in Section 6.1.1. This revision addresses updates in Yucca Mountain Project (YMP) administrative procedures as they

  13. DVU Featured Training & Events Form

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Featured Training & Events Form Please complete this form in its entirety and email to AskTheDvu@hq.doe.gov 1. Course Title: 2. Course Start/End Date: 3. Start/End Time (Time zone required): 4. Registration Link: Website Name and URL Link: 5. CHRIS Course Code & Session Number: If Applicable, Enter 6-Digit CHRIS Course Number 4-Digit CHRIS Session Number 6. Cost: 7. Course Type: (Ex: Live Webinar, Classroom, Online) 8. Course Location: Training Facility Address, Room # City & State

  14. Investigating nearby star-forming galaxies in the ultraviolet with HST/COS spectroscopy. I. Spectral analysis and interstellar abundance determinations

    SciTech Connect

    James, B. L.; Aloisi, A.; Sohn, S. T.; Wolfe, M. A.; Heckman, T.

    2014-11-10

    This is the first in a series of three papers describing a project with the Cosmic Origins Spectrograph on the Hubble Space Telescope to measure abundances of the neutral interstellar medium (ISM) in a sample of nine nearby star-forming galaxies. The goal is to assess the (in)homogeneities of the multiphase ISM in galaxies where the bulk of metals can be hidden in the neutral phase, yet the metallicity is inferred from the ionized gas in the H II regions. The sample, spanning a wide range in physical properties, is to date the best suited to investigate the metallicity behavior of the neutral gas at redshift z = 0. ISM absorption lines were detected against the far-ultraviolet spectra of the brightest star-forming region(s) within each galaxy. Here we report on the observations, data reduction, and analysis of these spectra. Column densities were measured by a multicomponent line-profile fitting technique, and neutral-gas abundances were obtained for a wide range of elements. Several caveats were considered, including line saturation, ionization corrections, and dust depletion. Ionization effects were quantified with ad hoc CLOUDY models reproducing the complex photoionization structure of the ionized and neutral gas surrounding the UV-bright sources. An 'average spectrum of a redshift z = 0 star-forming galaxy' was obtained from the average column densities of unsaturated profiles of neutral-gas species. This template can be used as a powerful tool for studies of the neutral ISM at both low and high redshift.

  15. Plan for protection of oil and natural gas resources Naval Oil Shale Reserve No. 1 and No. 3, Garfield County, Colorado. [Communitization to prevent losses to nearby drillers

    SciTech Connect

    Not Available

    1987-10-01

    This plan provides for the protection of the Government's interest in hydrocarbons found in Naval Oil Shale Reserve No.1 (NOSR-1) and Naval Oil Shale Reserve No. 3 (NOSR-3) located in GArfield County, Colorado, and complements a similar plan developed in 1983. Recent development of private property near NOSR-3 exceeds the activity contemplated in the 1983 plan, and has progressed to drilling units on land which, under Colorado spacing orders, would include at least 50 percent NOSR-3 land. Due to the proximity of these commerical gas wells to NOSR-3 land, it is estimated that gas produced from the wells would include gas which had migrated from NOSR-3. To protect the Government's interest in these and other such wells which may be drilled near NOSR-1 or NOSR-3, the Department's plan of primary protection is to enter into communitization agreements with the private developers when they initiate wells which would drain NOSR-1 or NOSR-3 hydrocarbons. In general, these agreements would permit the sharing of costs and hydrocarbon production based on surface acreage owned by each party in each of the drilling units. If attempts to obtain such agreements fail, or if it is determined that offset wells are needed in addition to the communitized units, the Department plans to drill and produce wells on NOSR-1 and NOSR-3 which would offset production from nearby wells on private lands. These measures will preclude the migration of NOSR-1 and NOSR-3 hydrocarbons to privately-owned wells, and protect the Government's resources. The results of the Department of Justice anti-trust review performed pursuant to Section 7430(g) of title 10, United States Code, are provided as a part of this plan at Exhibit N.

  16. A PLANETARY SYSTEM AROUND THE NEARBY M DWARF GJ 667C WITH AT LEAST ONE SUPER-EARTH IN ITS HABITABLE ZONE

    SciTech Connect

    Anglada-Escude, Guillem; Butler, R. Paul; Arriagada, Pamela; Minniti, Dante; Vogt, Steven S.; Rivera, Eugenio J.; Haghighipour, Nader; Carter, Brad D.; Tinney, C. G.; Wittenmyer, Robert A.; Bailey, Jeremy A.; O'Toole, Simon J.; Jones, Hugh R. A.; Jenkins, James S.

    2012-05-20

    We re-analyze 4 years of HARPS spectra of the nearby M1.5 dwarf GJ 667C available through the European Southern Observatory public archive. The new radial velocity (RV) measurements were obtained using a new data analysis technique that derives the Doppler measurement and other instrumental effects using a least-squares approach. Combining these new 143 measurements with 41 additional RVs from the Magellan/Planet Finder Spectrograph and Keck/High Resolution Echelle Spectrometer spectrometers reveals three additional signals beyond the previously reported 7.2 day candidate, with periods of 28 days, 75 days, and a secular trend consistent with the presence of a gas giant (period {approx}10 years). The 28 day signal implies a planet candidate with a minimum mass of 4.5 M{sub Circled-Plus} orbiting well within the canonical definition of the star's liquid water habitable zone (HZ), that is, the region around the star at which an Earth-like planet could sustain liquid water on its surface. Still, the ultimate water supporting capability of this candidate depends on properties that are unknown such as its albedo, atmospheric composition, and interior dynamics. The 75 day signal is less certain, being significantly affected by aliasing interactions among a potential 91 day signal, and the likely rotation period of the star at 105 days detected in two activity indices. GJ 667C is the common proper motion companion to the GJ 667AB binary, which is metal-poor compared to the Sun. The presence of a super-Earth in the HZ of a metal-poor M dwarf in a triple star system supports the evidence that such worlds should be ubiquitous in the Galaxy.

  17. ON THE CARBON-TO-OXYGEN RATIO MEASUREMENT IN NEARBY SUN-LIKE STARS: IMPLICATIONS FOR PLANET FORMATION AND THE DETERMINATION OF STELLAR ABUNDANCES

    SciTech Connect

    Fortney, Jonathan J.

    2012-03-10

    Recent high-resolution spectroscopic analysis of nearby FGK stars suggests that a high C/O ratio of greater than 0.8, or even 1.0, is relatively common. Two published catalogs find C/O > 0.8 in 25%-30% of systems, and C/O > 1.0 in {approx}6%-10%. It has been suggested that in protoplanetary disks with C/O > 0.8 that the condensation pathways to refractory solids will differ from what occurred in our solar system, where C/O = 0.55. The carbon-rich disks are calculated to make carbon-dominated rocky planets, rather than oxygen-dominated ones. Here we suggest that the derived stellar C/O ratios are overestimated. One constraint on the frequency of high C/O is the relative paucity of carbon dwarf stars (10{sup -3}-10{sup -5}) found in large samples of low-mass stars. We suggest reasons for this overestimation, including a high C/O ratio for the solar atmosphere model used for differential abundance analysis, the treatment of a Ni blend that affects the O abundance, and limitations of one-dimensional LTE stellar atmosphere models. Furthermore, from the estimated errors on the measured stellar C/O ratios, we find that the significance of the high C/O tail is weakened, with a true measured fraction of C/O > 0.8 in 10%-15% of stars, and C/O > 1.0 in 1%-5%, although these are still likely overestimates. We suggest that infrared T-dwarf spectra could show how common high C/O is in the stellar neighborhood, as the chemistry and spectra of such objects would differ compared to those with solar-like abundances. While possible at C/O > 0.8, we expect that carbon-dominated rocky planets are rarer than others have suggested.

  18. CHARACTERIZATION OF THE NEARBY L/T BINARY BROWN DWARF WISE J104915.57-531906.1 AT 2 pc FROM THE SUN

    SciTech Connect

    Kniazev, A. Y.; Vaisanen, P.; Potter, S. B.; Crawford, S.; Gulbis, A. A. S.; Muzic, K.; Mehner, A.; Boffin, H. M. J.; Melo, C.; Ivanov, V. D.; Girard, J.; Mawet, D.; Schmidtobreick, L.; Kurtev, R.; Borissova, J.; Huelamo, N.; Minniti, D.; Ishibashi, K.; Beletsky, Y.; Buckley, D. A. H.; and others

    2013-06-20

    WISE J104915.57-531906.1 is a L/T brown dwarf binary located 2 pc from the Sun. The pair contains the closest known brown dwarfs and is the third closest known system, stellar or sub-stellar. We report comprehensive follow-up observations of this newly uncovered system. We have determined the spectral types of both components (L8 {+-} 1, for the primary, agreeing with the discovery paper; T1.5 {+-} 2 for the secondary, which was lacking spectroscopic type determination in the discovery paper) and, for the first time, their radial velocities (V{sub rad} {approx} 23.1, 19.5 km s{sup -1}) using optical spectra obtained at the Southern African Large Telescope and other facilities located at the South African Astronomical Observatory (SAAO). The relative radial velocity of the two components is smaller than the range of orbital velocities for theoretically predicted masses, implying that they form a gravitationally bound system. We report resolved near-infrared JHK{sub S} photometry from the Infrared Survey Facility telescope at the SAAO which yields colors consistent with the spectroscopically derived spectral types. The available kinematic and photometric information excludes the possibility that the object belongs to any of the known nearby young moving groups or associations. Simultaneous optical polarimetry observations taken at the SAAO 1.9 m give a non-detection with an upper limit of 0.07%. For the given spectral types and absolute magnitudes, 1 Gyr theoretical models predict masses of 0.04-0.05 M{sub Sun} for the primary, and 0.03-0.05 M{sub Sun} for the secondary.

  19. INTEGRAL FIELD SPECTROSCOPY AND MULTI-WAVELENGTH IMAGING OF THE NEARBY SPIRAL GALAXY NGC 5668 : AN UNUSUAL FLATTENING IN METALLICITY GRADIENT

    SciTech Connect

    Marino, R. A.; Gil de Paz, A.; Castillo-Morales, A.; Perez-Gonzalez, P. G.; Gallego, J.; Zamorano, J.; Sanchez, S. F.

    2012-07-20

    We present an analysis of the full bidimensional optical spectral cube of the nearby spiral galaxy NGC 5668, observed with the Pmas fiber PAcK Integral Field Unit (IFU) at the Calar Alto observatory 3.5 m telescope. We make use of broadband imaging to provide further constraints on the evolutionary history of the galaxy. This data set will allow us to improve our understanding of the mechanisms that drive the evolution of disks. We investigated the properties of 62 H II regions and concentric rings in NGC 5668 and derived maps in ionized-gas attenuation and chemical (oxygen) abundances. We find that while inward of r {approx}36'' {approx} 4.4 kpc {approx} 0.36 (D{sub 25}/2) the derived O/H ratio follows the radial gradient typical of spiral galaxies, the abundance gradient beyond r {approx} 36'' flattens out. The analysis of the multi-wavelength surface brightness profiles of NGC 5668 is performed by fitting these profiles with those predicted by chemo-spectrophotometric evolutionary models of galaxy disks. From this, we infer a spin and circular velocity of {lambda} = 0.053 and v{sub c} = 167 km s{sup -1}, respectively. The metallicity gradient and rotation curve predicted by this best-fitting galaxy model nicely match the values derived from the IFU observations, especially within r {approx}36''. The same is true for the colors despite some small offsets and a reddening in the bluest colors beyond that radius. On the other hand, deviations of some of these properties in the outer disk indicate that a secondary mechanism, possibly gas transfer induced by the presence of a young bar, must have played a role in shaping the recent chemical and star formation histories of NGC 5668.

  20. Method of identifying features in indexed data

    DOEpatents

    Jarman, Kristin H. [Richland, WA; Daly, Don Simone [Richland, WA; Anderson, Kevin K. [Richland, WA; Wahl, Karen L. [Richland, WA

    2001-06-26

    The present invention is a method of identifying features in indexed data, especially useful for distinguishing signal from noise in data provided as a plurality of ordered pairs. Each of the plurality of ordered pairs has an index and a response. The method has the steps of: (a) providing an index window having a first window end located on a first index and extending across a plurality of indices to a second window end; (b) selecting responses corresponding to the plurality of indices within the index window and computing a measure of dispersion of the responses; and (c) comparing the measure of dispersion to a dispersion critical value. Advantages of the present invention include minimizing signal to noise ratio, signal drift, varying baseline signal and combinations thereof.

  1. Features, Events, and Processes: Disruptive Events

    SciTech Connect

    J. King

    2004-03-31

    The primary purpose of this analysis is to evaluate seismic- and igneous-related features, events, and processes (FEPs). These FEPs represent areas of natural system processes that have the potential to produce disruptive events (DE) that could impact repository performance and are related to the geologic processes of tectonism, structural deformation, seismicity, and igneous activity. Collectively, they are referred to as the DE FEPs. This evaluation determines which of the DE FEPs are excluded from modeling used to support the total system performance assessment for license application (TSPA-LA). The evaluation is based on the data and results presented in supporting analysis reports, model reports, technical information, or corroborative documents that are cited in the individual FEP discussions in Section 6.2 of this analysis report.

  2. Component with inspection-facilitating features

    DOEpatents

    Marra, John J; Zombo, Paul J

    2014-02-11

    A turbine airfoil can be formed with features to facilitate measurement of its wall thickness. An outer wall of the airfoil can include an outer surface and an inner surface. The outer surface of the airfoil can have an outer inspection target surface, and the inner surface of the airfoil can have an inner inspection target surface. The inner and outer target surfaces can define substantially flat regions in surfaces that are otherwise highly contoured. The inner and outer inspection target surfaces can be substantially aligned with each other. The inner and outer target surfaces can be substantially parallel to each other. As a result of these arrangements, a highly accurate measurement of wall thickness can be obtained. In one embodiment, the outer inspection target surface can be defined by an innermost surface of a groove formed in the outer surface of the outer wall of the airfoil.

  3. FINDING η CAR ANALOGS IN NEARBY GALAXIES USING Spitzer. II. IDENTIFICATION OF AN EMERGING CLASS OF EXTRAGALACTIC SELF-OBSCURED STARS

    SciTech Connect

    Khan, Rubab; Kochanek, C. S.; Stanek, K. Z.; Gerke, Jill

    2015-02-01

    Understanding the late-stage evolution of the most massive stars such as η Carinae is challenging because no true analogs of η Car have been clearly identified in the Milky Way or other galaxies. In Khan et al., we utilized Spitzer IRAC images of 7 nearby (≲ 4 Mpc) galaxies to search for such analogs, and found 34 candidates with flat or red mid-IR spectral energy distributions. Here, in Paper II, we present our characterization of these candidates using multi-wavelength data from the optical through the far-IR. Our search detected no true analogs of η Car, which implies an eruption rate that is a fraction 0.01 ≲ F ≲ 0.19 of the core-collapse supernova (ccSN) rate. This is roughly consistent with each M {sub ZAMS} ≳ 70 M {sub ☉} star undergoing one or two outbursts in its lifetime. However, we do identify a significant population of 18 lower luminosity (log (L/L {sub ☉}) ≅ 5.5-6.0) dusty stars. Stars enter this phase at a rate that is a fraction 0.09 ≲ F ≲ 0.55 of the ccSN rate, and this is consistent with all 25 < M {sub ZAMS} < 60 M {sub ☉} stars undergoing an obscured phase at most lasting a few thousand years once or twice. These phases constitute a negligible fraction of post-main-sequence lifetimes of massive stars, which implies that these events are likely to be associated with special periods in the evolution of the stars. The mass of the obscuring material is of order ∼M {sub ☉}, and we simply do not find enough heavily obscured stars for theses phases to represent more than a modest fraction (∼10% not ∼50%) of the total mass lost by these stars. In the long term, the sources that we identified will be prime candidates for detailed physical analysis with the James Webb Space Telescope.

  4. Richards Barrier LA Reference Design Feature Evaluation

    SciTech Connect

    N.E. Kramer

    1999-11-17

    The Richards Barrier is one of the design features of the repository to be considered for the License Application (LA), Richards was a soil scientist who first described the diversion of moisture between two materials with different hydrologic properties. In this report, a Richards Barrier is a special type of backfill with a fine-grained material (such as sand) overlaying a coarse-grained material (such as gravel). Water that enters an emplacement drift will first encounter the fine-grained material and be transported around the coarse-grained material covering the waste package, thus protecting the waste package from contact with most of the groundwater. The objective of this report is to discuss the benefits and liabilities to the repository by the inclusion of a Richards Barrier type backfill in emplacement drifts. The Richards Barrier can act as a barrier to water flow, can reduce the waste package material dissolution rate, limit mobilization of the radionuclides, and can provide structural protection for the waste package. The scope of this report is to: (1) Analyze the behavior of barrier materials following the intrusion of groundwater for influxes of 1 to 300 mm per year. The report will demonstrate diversion of groundwater intrusions into the barrier over an extended time period when seismic activity and consolidation may cause the potential for liquefaction and settlement of the Richards Barrier. (2) Review the thermal effects of the Richards Barrier on material behavior. (3) Analyze the effect of rockfall on the performance of the Richards Barrier and the depth of the barrier required to protect waste packages under the barrier. (4) Review radiological and heating conditions on placement of multiple layers of the barrier. Subsurface Nuclear Safety personnel will perform calculations to determine the radiation reduction-time relationship and shielding capacity of the barrier. (5) Evaluate the effects of ventilation on cooling of emplacement drifts and

  5. Features, Events, and Processes: Disruptive Events

    SciTech Connect

    P. Sanchez

    2004-11-08

    The purpose of this analysis report is to evaluate and document the inclusion or exclusion of the disruptive events features, events, and processes (FEPs) with respect to modeling used to support the total system performance assessment for license application (TSPA-LA). A screening decision, either ''Included'' or ''Excluded,'' is given for each FEP, along with the technical basis for screening decisions. This information is required by the U.S. Nuclear Regulatory Commission (NRC) at 10 CFR 63.114 (d), (e), and (f) [DIRS 156605]. The FEPs addressed in this report deal with both seismic and igneous disruptive events, such as fault displacements through the repository and an igneous intrusion into the repository. For included FEPs, this analysis summarizes the implementation of the FEP in TSPA-LA (i.e., how the FEP is included). For excluded FEPs, this analysis provides the technical basis for exclusion from TSPA-LA (i.e., why the FEP is excluded). Previous versions of this report were developed to support the total system performance assessments (TSPA) for various prior repository designs. This revision addresses the repository design for the license application (LA).

  6. Features, Events, and Processes: system Level

    SciTech Connect

    D. McGregor

    2004-10-15

    The purpose of this analysis report is to evaluate and document the inclusion or exclusion of the system-level features, events, and processes (FEPs) with respect to modeling used to support the total system performance assessment for the license application (TSPA-LA). A screening decision, either Included or Excluded, is given for each FEP along with the technical basis for screening decisions. This information is required by the U.S. Nuclear Regulatory Commission (NRC) at 10 CFR 63.113 (d, e, and f) (DIRS 156605). The system-level FEPs addressed in this report typically are overarching in nature, rather than being focused on a particular process or subsystem. As a result, they are best dealt with at the system level rather than addressed within supporting process-level or subsystem-level analyses and models reports. The system-level FEPs also tend to be directly addressed by regulations, guidance documents, or assumptions listed in the regulations; or are addressed in background information used in development of the regulations. For included FEPs, this analysis summarizes the implementation of the FEP in the TSPA-LA (i.e., how the FEP is included). For excluded FEPs, this analysis provides the technical basis for exclusion from the TSPA-LA (i.e., why the FEP is excluded). The initial version of this report (Revision 00) was developed to support the total system performance assessment for site recommendation (TSPA-SR). This revision addresses the license application (LA) FEP List (DIRS 170760).

  7. Characterizing ultraviolet and infrared observational properties for galaxies. II. Features of attenuation law

    SciTech Connect

    Mao, Ye-Wei; Kong, Xu; Lin, Lin E-mail: xkong@ustc.edu.cn

    2014-07-01

    Variations in the attenuation law have a significant impact on observed spectral energy distributions for galaxies. As one important observational property for galaxies at ultraviolet and infrared wavelength bands, the correlation between infrared-to-ultraviolet luminosity ratio and ultraviolet color index (or ultraviolet spectral slope), i.e., the IRX-UV relation (or IRX-β relation), offered a widely used formula for correcting dust attenuation in galaxies, but the usability appears to be in doubt now because of considerable dispersion in this relation found by many studies. In this paper, on the basis of spectral synthesis modeling and spatially resolved measurements of four nearby spiral galaxies, we provide an interpretation of the deviation in the IRX-UV relation with variations in the attenuation law. From both theoretical and observational viewpoints, two components in the attenuation curve, the linear background and the 2175 Å bump, are suggested to be the parameters in addition to the stellar population age (addressed in the first paper of this series) in the IRX-UV function; different features in the attenuation curve are diagnosed for the galaxies in our sample. Nevertheless, it is often difficult to ascertain the attenuation law for galaxies in actual observations. Possible reasons for preventing the successful detection of the parameters in the attenuation curve are also discussed in this paper, including the degeneracy of the linear background and the 2175 Å bump in observational channels, the requirement for young and dust-rich systems to study, and the difficulty in accurate estimates of dust attenuations at different wavelength bands.

  8. Notre Dame EFRC featured during nationally televised football...

    Office of Science (SC)

    Notre Dame EFRC featured during nationally televised football half-time show Print Text Size: A A A Subscribe FeedbackShare Page Nov 21, 2009 :: NBC aired a video feature External ...

  9. PARC Seminar Series featuring David Tiede | Photosynthetic Antenna...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    PARC Seminar Series featuring David Tiede PARC Seminar Series featuring David Tiede Wiring Photosynthetic and Redox Proteins for Solar Fuels Function April 21, 2015 - 11:00am Rodin...

  10. NNSA Highly Enriched Uranium Removal Featured on The Rachel Maddow...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    NNSA Highly Enriched Uranium Removal Featured on The Rachel Maddow Show NNSA Highly Enriched Uranium Removal Featured on The Rachel Maddow Show March 22, 2012 - 11:37am Addthis ...

  11. Feb. 9 Event at Jefferson Lab Features Chemistry Demonstrations...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    9 Event at Jefferson Lab Features Chemistry Demonstrations Set to Pop Music Feb. 9 Event at Jefferson Lab Features Chemistry Demonstrations Set to Pop Music NEWPORT NEWS, Va., Feb. ...

  12. ARPA-E Announces 2012 Energy Innovation Summit Featuring Bill...

    Energy Saver

    2012 Energy Innovation Summit Featuring Bill Gates, Fred Smith and Lee Scott ARPA-E Announces 2012 Energy Innovation Summit Featuring Bill Gates, Fred Smith and Lee Scott September ...

  13. Science.gov Features Food Safety, Classroom Resources, and Immunization

    Office of Scientific and Technical Information (OSTI)

    Websites | OSTI, US Dept of Energy Office of Scientific and Technical Information Features Food Safety, Classroom Resources, and Immunization Websites Back to the OSTI News Listing for 2008 Science.gov, the go-to portal for government science information, is currently featuring food safety, classroom resources, and immunization websites. Science.gov's featured sites are rotated frequently, but you can access a comprehensive list of previous features by going to the Science.gov website and

  14. LSU EFRC - Center for Atomic Level Catalyst Design - Featured Videos

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Featured Videos >> space control Dr. James Spivey featured in ACS: Voices of Research space control Dr. Wayne Goodman's Research Group space control Group of Inorganic Chemistry and Catalysis space control Dr. Susan Sinnot's Research Group space control Nanomaterials and Nanofabrication Group space control space control Featured Videos space control space control Other Featured Videos space control Dr. Wayne Goodman's Research Group at Department of Chemistry, Texas A & M University

  15. Systems and processes for identifying features and determining feature associations in groups of documents

    DOEpatents

    Rose, Stuart J.; Cowley, Wendy E.; Crow, Vernon L.

    2016-01-12

    Systems and computer-implemented processes for identification of features and determination of feature associations in a group of documents can involve providing a plurality of keywords identified among the terms of at least some of the documents. A value measure can be calculated for each keyword. High-value keywords are defined as those keywords having value measures that exceed a threshold. For each high-value keyword, term-document associations (TDA) are accessed. The TDA characterize measures of association between each term and at least some documents in the group. A processor quantifies similarities between unique pairs of high-value keywords based on the TDA for each respective high-value keyword and generates a similarity matrix that indicates one or more sets that each comprise highly associated high-value keywords.

  16. Physics Features of TRU-Fueled VHTRs

    DOE PAGES [OSTI]

    Lewis, Tom G.; Tsvetkov, Pavel V.

    2009-01-01

    The current waste management strategy for spent nuclear fuel (SNF) mandated by the US Congress is the disposal of high-level waste (HLW) in a geological repository at Yucca Mountain. Ongoing efforts on closed-fuel cycle options and difficulties in opening and safeguarding such a repository have led to investigations of alternative waste management strategies. One potential strategy for the US fuel cycle would be to make use of fuel loadings containing high concentrations of transuranic (TRU) nuclides in the next-generation reactors. The use of such fuels would not only increase fuel supply but could also potentially facilitate prolonged operation modes (viamore » fertile additives) on a single fuel loading. The idea is to approach autonomous operation on a single fuel loading that would allow marketing power units as nuclear batteries for worldwide deployment. Studies have already shown that high-temperature gas-cooled reactors (HTGRs) and their Generation IV (GEN IV) extensions, very-high-temperature reactors (VHTRs), have encouraging performance characteristics. This paper is focused on possible physics features of TRU-fueled VHTRs. One of the objectives of a 3-year U.S. DOE NERI project was to show that TRU-fueled VHTRs have the possibility of prolonged operation on a single fuel loading. A 3D temperature distribution was developed based on conceivable operation conditions of the 600 MWth VHTR design. Results of extensive criticality and depletion calculations with varying fuel loadings showed that VHTRs are capable for autonomous operation and HLW waste reduction when loaded with TRU fuel.« less

  17. Trajectory analysis via a geometric feature space approach

    SciTech Connect

    Rintoul, Mark D.; Wilson, Andrew T.

    2015-10-05

    This study aimed to organize a body of trajectories in order to identify, search for and classify both common and uncommon behaviors among objects such as aircraft and ships. Existing comparison functions such as the Fréchet distance are computationally expensive and yield counterintuitive results in some cases. We propose an approach using feature vectors whose components represent succinctly the salient information in trajectories. These features incorporate basic information such as the total distance traveled and the distance between start/stop points as well as geometric features related to the properties of the convex hull, trajectory curvature and general distance geometry. Additionally, these features can generally be mapped easily to behaviors of interest to humans who are searching large databases. Most of these geometric features are invariant under rigid transformation. Furthermore, we demonstrate the use of different subsets of these features to identify trajectories similar to an exemplar, cluster a database of several hundred thousand trajectories and identify outliers.

  18. Jefferson Lab's Spring 2007 Science Series features two lectures in

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    February | Jefferson Lab 2007 Science Series features two lectures in February Jefferson Lab's Spring 2007 Science Series features two lectures in February January 30, 2007 Jefferson Lab will host two Spring Science Series lectures during February 2007. The first event is set for Tuesday, February 20, and will feature David Powars, with the U.S. Geological Survey (USGS), discussing the Chesapeake Bay Impact Crater. He will share with the audience, recent research from a core hole more than a

  19. DOE Science Showcase - Featured Climate Change Research from...

    Office of Scientific and Technical Information (OSTI)

    Featured Climate Change Research from DOE Databases Search Results from DOE Databases View research documents, citations, accomplishments, patents, and projects related to climate ...

  20. PPPL featured as DOE celebrates turning 35 | Princeton Plasma...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    featured as DOE celebrates turning 35 October 5, 2012 Tweet Widget Google Plus One Share on Facebook 35 Years at the Department of Energy (Flickr Photostream)...

  1. Sandia Energy - Mark Boslough Featured in NOVA Special about...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    in NOVA Special about the Chelyabinsk Meteor Scientist Mark Boslough (Discrete Mathematics and Complex Systems Dept.) was featured in NOVA's special program "Meteor Strike,"...

  2. Changes in Surficial Features Associated with Geothermal Development...

    OpenEI (Open Energy Information) [EERE & EIA]

    Changes in Surficial Features Associated with Geothermal Development in Long Valley Caldera, California, 1985-1997 Jump to: navigation, search OpenEI Reference LibraryAdd to...

  3. CASR and personnel features highlight Insider | The Ames Laboratory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    carcinogens damage DNA. Forsling was featured for her second career as a musician and piano teacher. The issue also contained stories on Ames Laboratory holiday traditions and...

  4. OE's SGIG Program Featured in EnergyBiz Magazine | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    OE's SGIG Program Featured in International Publication Assistant Secretary Patricia Hoffman to Deliver Keynote Address at IEEE PES Conference on Innovative Smart Grid Technologies ...

  5. BEopt Version 2.0: New Features | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    BEopt Version 2.0: New Features BEopt Version 2.0: New Features This document outlines the new features and capabilities of BEopt Version 2.0, a software that provides capabilities to evaluate residential building designs and identify cost-optimal efficiency packages at various levels of whole-house energy savings along the path to zero net energy. beopt_2-0_features.pdf (594.39 KB) More Documents & Publications Analysis: Targeting Zero Net Energy - 2014 BTO Peer Review Advanced Technical

  6. Los Alamos technology to be featured on CSI: NY

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Los Alamos technology to be featured on CSI: NY The multipurpose "sampler gun" rapidly ... Mountain Daylight Time April 2 on CBS. The multipurpose "sampler gun" rapidly collects and ...

  7. Feature based volume decomposition for automatic hexahedral mesh generation

    SciTech Connect

    LU,YONG; GADH,RAJIT; TAUTGES,TIMOTHY J.

    2000-02-21

    Much progress has been made through these years to achieve automatic hexahedral mesh generation. While general meshing algorithms that can take on general geometry are not there yet; many well-proven automatic meshing algorithms now work on certain classes of geometry. This paper presents a feature based volume decomposition approach for automatic Hexahedral Mesh generation. In this approach, feature recognition techniques are introduced to determine decomposition features from a CAD model. The features are then decomposed and mapped with appropriate automatic meshing algorithms suitable for the correspondent geometry. Thus a formerly unmeshable CAD model may become meshable. The procedure of feature decomposition is recursive: sub-models are further decomposed until either they are matched with appropriate meshing algorithms or no more decomposition features are detected. The feature recognition methods employed are convexity based and use topology and geometry information, which is generally available in BREP solid models. The operations of volume decomposition are also detailed in the paper. The final section, the capability of the feature decomposer is demonstrated over some complicated manufactured parts.

  8. PARC Seminar Series featuring Steven Boxer | Photosynthetic Antenna

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Research Center PARC Seminar Series featuring Steven Boxer PARC Seminar Series featuring Steven Boxer Vibrational Stark Spectroscopy Connects Electrostatics to Catalytic Rates at Enzyme Active Sites March 8, 2016 - 11:00am Brauer Hall 12, Washington University Event flyer Seminars

  9. THE STAR-FORMING HISTORIES OF THE NUCLEUS, BULGE, AND INNER DISK OF NGC5102: CLUES TO THE EVOLUTION OF A NEARBY LENTICULAR GALAXY {sup ,} {sup ,}

    SciTech Connect

    Davidge, T. J.

    2015-01-20

    Long slit spectra recorded with the Gemini Multi-Object Spectrograph on Gemini South are used to examine the star-forming history (SFH) of the lenticular galaxy NGC5102. Structural and supplemental photometric information are obtained from archival Spitzer [3.6] images. Absorption features at blue and visible wavelengths are traced out along the minor axis to galactocentric radii ?60 arcsec (?0.9 kpc), sampling the nucleus, bulge, and disk components. Comparisons with model spectra point to luminosity-weighted metallicities that are consistent with the colors of resolved red giant branch stars in the disk. The nucleus has a luminosity-weighted age at visible wavelengths of ?1{sub ?0.1}{sup +0.2}Gyr, and the integrated light is dominated by stars that formed over a time period of only a few hundred Myr. For comparison, the luminosity-weighted ages of the bulge and disk are ?2{sub ?0.2}{sup +0.5}Gyr and 10{sub ?2}{sup +2}Gyr, respectively. The g' [3.6] colors of the nucleus and bulge are consistent with the spectroscopically based ages. In contrast to the nucleus, models that assume star-forming activity spanning many Gyr provide a better match to the spectra of the bulge and disk than simple stellar population models. Isophotes in the bulge have a disky shape, hinting that the bulge was assembled from material with significant rotational support. The SFHs of the bulge and disk are consistent with the bulge forming from the collapse of a long-lived bar, rather than from the collapse of a transient structure that formed as the result of a tidal interaction. It is thus suggested that the progenitor of NGC5102 was a barred disk galaxy that morphed into a lenticular galaxy through the buckling of its bar.

  10. Unsupervised Feature Learning for High-Resolution Satellite Image Classification

    SciTech Connect

    Cheriyadat, Anil M

    2013-01-01

    The rich data provided by high-resolution satellite imagery allow us to directly model geospatial neighborhoods by understanding their spatial and structural patterns. In this paper we explore an unsupervised feature learning approach to model geospatial neighborhoods for classification purposes. While pixel and object based classification approaches are widely used for satellite image analysis, often these approaches exploit the high-fidelity image data in a limited way. In this paper we extract low-level features to characterize the local neighborhood patterns. We exploit the unlabeled feature measurements in a novel way to learn a set of basis functions to derive new features. The derived sparse feature representation obtained by encoding the measured features in terms of the learned basis function set yields superior classification performance. We applied our technique on two challenging image datasets: ORNL dataset representing one-meter spatial resolution satellite imagery representing five land-use categories and, UCMERCED dataset consisting of 21 different categories representing sub-meter resolution overhead imagery. Our results are highly promising and, in the case of UCMERCED dataset we outperform the best results obtained for this dataset. We show that our feature extraction and learning methods are highly effective in developing a detection system that can be used to automatically scan large-scale high-resolution satellite imagery for detecting large-facility.

  11. SU-E-J-65: Motion Difference Between the Pancreas and Nearby Veins for Pancreas Motion Monitoring Using Ultrasound During Radiation Therapy

    SciTech Connect

    Omari, E; Erickson, B; Li, X; Zhang, J

    2015-06-15

    Purpose: As it is generally difficult to outline the pancreas on an ultrasound b-mode image, visualized structures such as the portal or the splenic veins are assumed to have the same motion as the pancreas. These structures can be used as a surrogate for monitoring pancreas motion during radiation therapy (RT) delivery using ultrasound. To verify this assumption, we studied the motion difference between the head of the pancreas, the portal vein, the tail of the pancreas, and splenic vein. Methods: 4DCT data acquired during RT simulation were analyzed for a total of 5 randomly selected patients with pancreatic cancer. The data was sorted into 10 respiratory phases from 0% to 90% (0%: end of the inspiration, 50%: end of expiration) . The head of the pancreas (HP), tail of the pancreas (TP), portal vein (PV), and splenic vein (SV) were contoured on all 10 phases. The volume change and motion were measured in the left-right (LR), anterior-superior (AP), and superior-inferior (SI) directions. Results: The volume change for all patients/phases were: 1.2 ± 3% for HP, 0.78 ± 1.6% for PV, 2.5 ± 2.9% for TP, and 0.53 ± 2.1% for SV. Motion for each structure was estimated from the centroid displacements due to the uniformity of the structures and the small volume change. The measured motion between HP and PV was: LR: 0.1 ± 0.17 mm, AP: 0.04 ± 0.1 mm, SI: 0.17 ± 0.16 mm and between TP and the PV was: LR: 0.05 ± 0.3 mm, AP: 0.1 ± 0.4 mm, SI: 0.01 ± 0.022 mm. Conclusion: There are small motion differences between the portal vein and the head of the pancreas, and the splenic vein and the tail of the pancreas. This suggests the feasibility of utilizing these features for monitoring the pancreas motion during radiation therapy.

  12. Structure of the red fluorescent protein from a lancelet (Branchiostoma lanceolatum): a novel GYG chromophore covalently bound to a nearby tyrosine

    SciTech Connect

    Pletnev, Vladimir Z. Pletneva, Nadya V.; Lukyanov, Konstantin A.; Souslova, Ekaterina A.; Fradkov, Arkady F.; Chudakov, Dmitry M.; Chepurnykh, Tatyana; Yampolsky, Ilia V.; Wlodawer, Alexander; Dauter, Zbigniew; Pletnev, Sergei

    2013-09-01

    The crystal structure of the novel red emitting fluorescent protein from lancelet Branchiostoma lanceolatum (Chordata) revealed an unusual five residues cyclic unit comprising Gly58-Tyr59-Gly60 chromophore, the following Phe61 and Tyr62 covalently bound to chromophore Tyr59. A key property of proteins of the green fluorescent protein (GFP) family is their ability to form a chromophore group by post-translational modifications of internal amino acids, e.g. Ser65-Tyr66-Gly67 in GFP from the jellyfish Aequorea victoria (Cnidaria). Numerous structural studies have demonstrated that the green GFP-like chromophore represents the ‘core’ structure, which can be extended in red-shifted proteins owing to modifications of the protein backbone at the first chromophore-forming position. Here, the three-dimensional structures of green laGFP (λ{sub ex}/λ{sub em} = 502/511 nm) and red laRFP (λ{sub ex}/λ{sub em} ≃ 521/592 nm), which are fluorescent proteins (FPs) from the lancelet Branchiostoma lanceolatum (Chordata), were determined together with the structure of a red variant laRFP-ΔS83 (deletion of Ser83) with improved folding. Lancelet FPs are evolutionarily distant and share only ∼20% sequence identity with cnidarian FPs, which have been extensively characterized and widely used as genetically encoded probes. The structure of red-emitting laRFP revealed three exceptional features that have not been observed in wild-type fluorescent proteins from Cnidaria reported to date: (i) an unusual chromophore-forming sequence Gly58-Tyr59-Gly60, (ii) the presence of Gln211 at the position of the conserved catalytic Glu (Glu222 in Aequorea GFP), which proved to be crucial for chromophore formation, and (iii) the absence of modifications typical of known red chromophores and the presence of an extremely unusual covalent bond between the Tyr59 C{sup β} atom and the hydroxyl of the proximal Tyr62. The impact of this covalent bond on the red emission and the large Stokes shift (

  13. PNNL: PNNL In the News - PNNL 50th Anniversary Features

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    50th Anniversary Features Prepared for the Tri-City Herald A closer look at climate September 2015 A closer look at climate This edition focuses on how PNNL's research is helping...

  14. PARC Seminar Series featuring Jan Jaworski | Photosynthetic Antenna...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Jaworski PARC Seminar Series featuring Jan Jaworski Camelina as a model for oilseed biotechnology April 16, 2013 - 11:00am to 12:00pm Brauer 012, Washington University in St. Louis...

  15. Aljazeera story on rare earths features Alex King | The Ames...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Aljazeera story on rare earths features Alex King Aljazeera America recently did a story on the demand and scarcity of rare-earth metals and spoke to Ames Laboratory scientist and...

  16. Science.gov, Now with Multimedia, New Search Features, Spanish...

    Office of Scientific and Technical Information (OSTI)

    Information October 9, 2012 Science.gov, Now with Multimedia, New Search Features, Spanish Translations Spanish Version Debuted Oak Ridge, TN - Science.gov, the gateway to U.S. ...

  17. The Role of Circulation Features on Black Carbon Transport into...

    Office of Scientific and Technical Information (OSTI)

    Carbon Transport into the Arctic in the Community Atmosphere Model Version 5 (CAM5) Citation Details In-Document Search Title: The Role of Circulation Features on Black Carbon ...

  18. Ultraviolet Thomson scattering measurements of the electron feature...

    Office of Scientific and Technical Information (OSTI)

    Title: Ultraviolet Thomson scattering measurements of the electron feature with an energetic 263 nm probe Authors: Ross, J S ; Divol, L ; Sorce, C ; Froula, D H ; Glenzer, S H ...

  19. Science in St. Louis featuring Dr. Daniel Giammar | Photosynthetic...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Daniel Giammar Science in St. Louis featuring Dr. Daniel Giammar The Chemistry and Engineering for Producing and Supplying Clean Drinking Water November 22, 2014 - 10:30am Brauer...

  20. Discrete Feature Approach for Heterogeneous Reservoir Production Enhancement

    SciTech Connect

    Dershowitz, William S.; Curran, Brendan; Einstein, Herbert; LaPointe, Paul; Shuttle, Dawn; Klise, Kate

    2002-07-26

    The report presents summaries of technology development for discrete feature modeling in support of the improved oil recovery (IOR) for heterogeneous reservoirs. In addition, the report describes the demonstration of these technologies at project study sites.

  1. Science in St. Louis featuring Dr. Ursula Goodenough | Photosynthetic...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Ursula Goodenough Science in St. Louis featuring Dr. Ursula Goodenough Developing Algae As Producers of Jet Fuel November 15, 2014 - 10:30am Brauer Hall 012, Washington University...

  2. Wavelet Algorithm for Feature Identification and Image Analysis

    Energy Science and Technology Software Center

    2005-10-01

    WVL are a set of python scripts based on the algorithm described in "A novel 3D wavelet-based filter for visualizing features in noisy biological data, " W. C. Moss et al., J. Microsc. 219, 43-49 (2005)

  3. Intrinsic feature-based pose measurement for imaging motion compensation

    SciTech Connect

    Baba, Justin S.; Goddard, Jr., James Samuel

    2014-08-19

    Systems and methods for generating motion corrected tomographic images are provided. A method includes obtaining first images of a region of interest (ROI) to be imaged and associated with a first time, where the first images are associated with different positions and orientations with respect to the ROI. The method also includes defining an active region in the each of the first images and selecting intrinsic features in each of the first images based on the active region. Second, identifying a portion of the intrinsic features temporally and spatially matching intrinsic features in corresponding ones of second images of the ROI associated with a second time prior to the first time and computing three-dimensional (3D) coordinates for the portion of the intrinsic features. Finally, the method includes computing a relative pose for the first images based on the 3D coordinates.

  4. PARC Seminar Series featuring Rienk van Grondelle | Photosynthetic Antenna

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Research Center Rienk van Grondelle PARC Seminar Series featuring Rienk van Grondelle The Quantum Design of Photosynthesis October 4, 2016 - 11:00am Brauer Hall room 12 Click here to view Flyer

  5. Geothermal Heating and Cooling Systems Featured on NBC Nightly News

    Energy.gov [DOE]

    NBC Nightly News recently featured a story on geothermal heating and cooling systems that are providing 30%-70% energy and cost savings for homeowners in Jordan, New York.

  6. OSTI features Nobel Prize winner Leon Lederman | OSTI, US Dept...

    Office of Scientific and Technical Information (OSTI)

    The OSTI-developed and -managed Web site, DOE R&D Accomplishments, has posted a feature highlighting Leon Lederman, who proposed the idea that eventually became the Fermi National ...

  7. NREL: Transportation Research - NPR Features Transportation and Hydrogen

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Systems Center Director Chris Gearhart NPR Features Transportation and Hydrogen Systems Center Director Chris Gearhart September 30, 2016 National Public Radio (NPR) recently featured the National Renewable Energy Laboratory's (NREL's) Chris Gearhart, director of NREL's Transportation and Hydrogen Systems Center, in an interview on the affordability of low-emission vehicles. "I come to work every day because I think that getting greenhouse gas emissions out of the transportation sector

  8. The effective field theory of inflation models with sharp features

    SciTech Connect

    Bartolo, Nicola; Cannone, Dario; Matarrese, Sabino E-mail: dario.cannone@pd.infn.it

    2013-10-01

    We describe models of single-field inflation with small and sharp step features in the potential (and sound speed) of the inflaton field, in the context of the Effective Field Theory of Inflation. This approach allows us to study the effects of features in the power-spectrum and in the bispectrum of curvature perturbations, from a model-independent point of view, by parametrizing the features directly with modified ''slow-roll'' parameters. We can obtain a self-consistent power-spectrum, together with enhanced non-Gaussianity, which grows with a quantity ? that parametrizes the sharpness of the step. With this treatment it is straightforward to generalize and include features in other coefficients of the effective action of the inflaton field fluctuations. Our conclusion in this case is that, excluding extrinsic curvature terms, the only interesting effects at the level of the bispectrum could arise from features in the first slow-roll parameter ? or in the speed of sound c{sub s}. Finally, we derive an upper bound on the parameter ? from the consistency of the perturbative expansion of the action for inflaton perturbations. This constraint can be used for an estimation of the signal-to-noise ratio, to show that the observable which is most sensitive to features is the power-spectrum. This conclusion would change if we consider the contemporary presence of a feature and a speed of sound c{sub s} < 1, as, in such a case, contributions from an oscillating folded configuration can potentially make the bispectrum the leading observable for feature models.

  9. Macomb Community College featured at OSTI Community College Connections |

    Office of Scientific and Technical Information (OSTI)

    OSTI, US Dept of Energy Office of Scientific and Technical Information Macomb Community College featured at OSTI Community College Connections Back to the OSTI News Listing for 2011 From biological sciences to automotive engineering, Macomb Community College has a wide range of programs now featured at the Community College Connections website. Read about Macomb Community College and other colleges and universities benefiting from Department of Energy research and development at

  10. Chicago Business Features Argonne Woman in Nuclear Physics | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Energy Chicago Business Features Argonne Woman in Nuclear Physics Chicago Business Features Argonne Woman in Nuclear Physics January 9, 2012 - 4:08pm Addthis Kawtar Hafidi is an experimental nuclear physicist, working in the medium energy physics group at Argonne. Image courtesy of Argonne National Laboratory. Kawtar Hafidi is an experimental nuclear physicist, working in the medium energy physics group at Argonne. Image courtesy of Argonne National Laboratory. Chicago Business has the scoop

  11. Feature-Based Statistical Analysis of Combustion Simulation Data

    SciTech Connect

    Bennett, J; Krishnamoorthy, V; Liu, S; Grout, R; Hawkes, E; Chen, J; Pascucci, V; Bremer, P T

    2011-11-18

    We present a new framework for feature-based statistical analysis of large-scale scientific data and demonstrate its effectiveness by analyzing features from Direct Numerical Simulations (DNS) of turbulent combustion. Turbulent flows are ubiquitous and account for transport and mixing processes in combustion, astrophysics, fusion, and climate modeling among other disciplines. They are also characterized by coherent structure or organized motion, i.e. nonlocal entities whose geometrical features can directly impact molecular mixing and reactive processes. While traditional multi-point statistics provide correlative information, they lack nonlocal structural information, and hence, fail to provide mechanistic causality information between organized fluid motion and mixing and reactive processes. Hence, it is of great interest to capture and track flow features and their statistics together with their correlation with relevant scalar quantities, e.g. temperature or species concentrations. In our approach we encode the set of all possible flow features by pre-computing merge trees augmented with attributes, such as statistical moments of various scalar fields, e.g. temperature, as well as length-scales computed via spectral analysis. The computation is performed in an efficient streaming manner in a pre-processing step and results in a collection of meta-data that is orders of magnitude smaller than the original simulation data. This meta-data is sufficient to support a fully flexible and interactive analysis of the features, allowing for arbitrary thresholds, providing per-feature statistics, and creating various global diagnostics such as Cumulative Density Functions (CDFs), histograms, or time-series. We combine the analysis with a rendering of the features in a linked-view browser that enables scientists to interactively explore, visualize, and analyze the equivalent of one terabyte of simulation data. We highlight the utility of this new framework for combustion

  12. Parade of Homes Display Features Energy-Saving Ideas

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Parade of Homes Display Features Energy-Saving Ideas For more information contact: George Douglas (303) 275-4096 e:mail: george_douglas@nrel.gov Golden, Colo., July 29, 1998 — The U.S. Department of Energy's (DOE) National Renewable Energy Laboratory will showcase energy efficient and solar energy ideas for homebuyers and homebuilders during the Denver-area Parade of Homes. NREL's exhibit features information on energy-efficient lighting, building design, windows and insulation. The display

  13. Multi-tube fuel nozzle with mixing features

    DOEpatents

    Hughes, Michael John

    2014-04-22

    A system includes a multi-tube fuel nozzle having an inlet plate and a plurality of tubes adjacent the inlet plate. The inlet plate includes a plurality of apertures, and each aperture includes an inlet feature. Each tube of the plurality of tubes is coupled to an aperture of the plurality of apertures. The multi-tube fuel nozzle includes a differential configuration of inlet features among the plurality of tubes.

  14. 20th Century Reanalysis Project Featured in HPCWire Podcast

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    20th Century 20th Century Reanalysis Project Featured in HPCWire Podcast March 11, 2014 earthreanalysis The 20th Century Reanalysis Project is generating a six-hourly, four-dimensional global atmospheric dataset spanning 1871 to 2011 to place current atmospheric circulation patterns into a historical perspective. Long-time NERSC user Dr. Gil Compo and the 20th Century Reanalysis project were featured March 10 in an HPCWire podcast, "Powering the 20th Century Weather Reanalysis

  15. OE's SGIG Program Featured in International Publication | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Energy OE's SGIG Program Featured in International Publication OE's SGIG Program Featured in International Publication April 6, 2012 - 2:10pm Addthis An article in the March 2012 issue of the quarterly publication Metering International focuses on DOE's Smart Grid Investment Grant program, highlighting how the program is improving the reliability and resiliency of the US electric grid. The article examines the need to protect the grid and the benefits of modernization, including reduced

  16. NERSC Helps Physicists ID New Molecules With Unique Features

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    NERSC Helps Physicists ID New Molecules With Unique Features NERSC Helps Physicists ID New Molecules With Unique Features Hollow magnetic cage molecules may have applications in technology, healthcare August 10, 2013 NERSC supercomputing resources helped Virginia Commonwealth University (VCU) researchers determine it may be possible to create large, hollow magnetic cage molecules that could be used in medicine as a drug delivery system to noninvasively treat tumors and in other emerging

  17. Jefferson Lab announces two Fall Science Series events -- featuring magic

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    and football | Jefferson Lab events -- featuring magic and football Jefferson Lab announces two Fall Science Series events - featuring magic and football October 4, 2005 Using humor, stagecraft and lighting, along with laboratory experiments disguised as magical illusion, the audience will view science from a perspective most have never seen before with Bob Friedhoffer, author, scientist and magician. He will conduct "Einstein and Beyond - The Magic Show" on Tuesday, Oct. 25 at the

  18. Sustainable Transportation and National Parks Initiative Featured in

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Magazine | Department of Energy Sustainable Transportation and National Parks Initiative Featured in Magazine Sustainable Transportation and National Parks Initiative Featured in Magazine October 18, 2013 - 12:00am Addthis The latest issue of Continuum Magazine, which focuses on sustainable transportation, includes an article that spotlights the Clean Cities National Parks Initiative. This initiative supports the National Park Service's Green Parks Plan with transportation projects that

  19. INL featured in video presented at Copenhagen conference

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    INL featured in video presented at Copenhagen conference IDAHO FALLS - Idaho National Laboratory footage and research are featured in a video presented at the World Climate Change Summit in Copenhagen today. President Obama introduced the video, which is titled "America's Response to Climate Change" and discusses how varied energy technologies can combat climate change. In October, the Department of Energy's Public Affairs office asked the national laboratories to suggest ideas about

  20. Feature-Based Measuring Advisor, Version 2.1

    Energy Science and Technology Software Center

    2002-07-22

    The purpose of Feature-Based Measuring Advisor (FBMeas Advisor) is a graphical user interface enabling users to more effectively interact with a solid model for measuring applications. Specifically, the FBMeas Advisor provides a user interface to the functions and capabilities of the FBMeas component technology. The FBMeas Advisor allows end users to visualize, organize, and document their measuring process plans and to facilitate the generation of a coordinate measuring machine part programs before a workpiece ismore » fabricated. The FBMeas Advisor permits the user to interact with an FBTol-enabled solid model to interactively and/or automatically create a set of measuring features (e.g., cylinders, planes, slots) that comply with national and international interface standards (i.e., DMIS (Dimensional Measuring Interface Standard, ISO 22063)). Measuring plans include defining measuring features interactively or automatically. Associating measuring features with appropriate tolerances and datum features via FBTol. Determining what measuring tasks (e.g., measure this feature to validate a size tolerance, measure this feature to establish a primary datum for a specific datum reference frame) are necessary to measure the feature. Assigning a measuring method to perform the task. For coordinate metrology measuring methods, measure points are determined interactively or automatically. Sensors and sensor configurations are defined, represented, and assigned to measuring methods. Measuring machines are defined, represented, and assigned to measure operations. Upon completion of a coordinate metrology measuring plan, FBMeas allows DMIS code segments to be generated, which can be used for DMIS-based CMM part programs.« less

  1. Trajectory analysis via a geometric feature space approach

    DOE PAGES [OSTI]

    Rintoul, Mark D.; Wilson, Andrew T.

    2015-10-05

    This study aimed to organize a body of trajectories in order to identify, search for and classify both common and uncommon behaviors among objects such as aircraft and ships. Existing comparison functions such as the Fréchet distance are computationally expensive and yield counterintuitive results in some cases. We propose an approach using feature vectors whose components represent succinctly the salient information in trajectories. These features incorporate basic information such as the total distance traveled and the distance between start/stop points as well as geometric features related to the properties of the convex hull, trajectory curvature and general distance geometry. Additionally,more » these features can generally be mapped easily to behaviors of interest to humans who are searching large databases. Most of these geometric features are invariant under rigid transformation. Furthermore, we demonstrate the use of different subsets of these features to identify trajectories similar to an exemplar, cluster a database of several hundred thousand trajectories and identify outliers.« less

  2. Volume Decomposition and Feature Recognition for Hexahedral Mesh Generation

    SciTech Connect

    GADH,RAJIT; LU,YONG; TAUTGES,TIMOTHY J.

    1999-09-27

    Considerable progress has been made on automatic hexahedral mesh generation in recent years. Several automatic meshing algorithms have proven to be very reliable on certain classes of geometry. While it is always worth pursuing general algorithms viable on more general geometry, a combination of the well-established algorithms is ready to take on classes of complicated geometry. By partitioning the entire geometry into meshable pieces matched with appropriate meshing algorithm the original geometry becomes meshable and may achieve better mesh quality. Each meshable portion is recognized as a meshing feature. This paper, which is a part of the feature based meshing methodology, presents the work on shape recognition and volume decomposition to automatically decompose a CAD model into meshable volumes. There are four phases in this approach: (1) Feature Determination to extinct decomposition features, (2) Cutting Surfaces Generation to form the ''tailored'' cutting surfaces, (3) Body Decomposition to get the imprinted volumes; and (4) Meshing Algorithm Assignment to match volumes decomposed with appropriate meshing algorithms. The feature determination procedure is based on the CLoop feature recognition algorithm that is extended to be more general. Results are demonstrated over several parts with complicated topology and geometry.

  3. Features in the primordial power spectrum? A frequentist analysis

    SciTech Connect

    Hamann, Jan; Shafieloo, Arman; Souradeep, Tarun E-mail: a.shafieloo1@physics.ox.ac.uk

    2010-04-01

    Features in the primordial power spectrum have been suggested as an explanation for glitches in the angular power spectrum of temperature anisotropies measured by the WMAP satellite. However, these glitches might just as well be artifacts of noise or cosmic variance. Using the effective Δχ{sup 2} between the best-fit power-law spectrum and a deconvolved primordial spectrum as a measure of ''featureness'' of the data, we perform a full Monte-Carlo analysis to address the question of how significant the recovered features are. We find that in 26% of the simulated data sets the reconstructed spectrum yields a greater improvement in the likelihood than for the actually observed data. While features cannot be categorically ruled out by this analysis, and the possibility remains that simple theoretical models which predict some of the observed features might stand up to rigorous statistical testing, our results suggest that WMAP data are consistent with the assumption of a featureless power-law primordial spectrum.

  4. Feature Based Machining Process Planning V5.1

    Energy Science and Technology Software Center

    2001-07-30

    The purpose of the FB-Machining Advisor product is to provide industry with an end user product that will enable end users to more effectively interact with a solid model for manufacturing applications. The product allows end users to visualize and organize their manufacturing process plans as they are being conceived; avoid redundant and time consuming geometric construction and calculation; automate geometric reasoning processes, and automate downstream manufacturing applications. The product augments a solid model representationmore » of the part with a set of machining features (e.g., pockets, steps, holes, cutouts). The product also enables end users to interact with a solid model to create process plans. It will automatically recognize, or interactively create and modify surface based machining features (represented by sets of faces on the solid model) and volumetric machining features which are represented by delta volumes (solid bodies representing volumes of material to be removed from the part). The FB-Machining Advisor will generate “in process shapes” that represent the shape of the work piece prior or subsequent to a material removal operation. It is designed to facilitate process change propagation in order to minimize rework resulting from process modifications. The machining features will provide vital shape and tolerance information (i.e. depth of pocket, minimum side radius of pocket, diameter of hole, maximum surface finish of side walls). The FB-Machining Advisor also integrates solid model based (3 Dimensional) tolerance information with the machining feature representations.« less

  5. THE AROMATIC FEATURES IN VERY FAINT DWARF GALAXIES

    SciTech Connect

    Wu Ronin; Hogg, David W.; Moustakas, John

    2011-04-01

    We present optical and mid-infrared photometry of a statistically complete sample of 29 dwarf galaxies (M{sub r} > - 15 mag) selected from the Sloan Digital Sky Survey (SDSS) spectroscopic sample and observed in the mid-infrared with Spitzer IRAC. This sample contains nearby (redshift {approx}<0.005) galaxies 3 mag fainter than previously studied samples. We compare our sample with other star-forming galaxies that have been observed with both IRAC and SDSS. We examine the relationship of the infrared color, [3.6]-[7.8], sensitive to polycyclic aromatic hydrocarbon (PAH) abundance and also hot dust and stellar continuum, with star formation rates (SFRs), oxygen abundances, and radiation hardness, all estimated by optical emission lines. Consistent with studies of more luminous dwarfs, we find that these dwarf galaxies show much redder [3.6]-[7.8] color than luminous galaxies with similar specific SFRs. Unlike luminous galaxies, we find that these dwarf galaxies show no significant dependence at all of the [3.6]-[7.8] color on SFR, oxygen abundance, or radiation hardness, despite the fact that the sample spans a significant range in all of these quantities. When the dwarfs in our sample are compared with more luminous dwarfs, we find that the [3.6]-[7.8] color, potentially tracing the PAH emission, depends on oxygen abundance and radiation hardness. However, these two parameters are correlated with one another as well; we break this degeneracy by looking at the PAH-oxygen abundance relation at a fixed radiation hardness and the PAH-hardness relation at a fixed oxygen abundance. This test shows that the [3.6]-[7.8] color in dwarf galaxies appears to depend more directly on oxygen abundance based on the data currently available.

  6. Microscale Confinement features in microfluidic devices can affect biofilm

    SciTech Connect

    Kumar, Aloke; Karig, David K; Neethirajan, Suresh; Acharya, Rajesh K; Mukherjee, Partha P; Retterer, Scott T; Doktycz, Mitchel John

    2013-01-01

    Biofilms are aggregations of microbes that are encased by extra-cellular polymeric substances (EPS) and adhere to surfaces and interfaces. Biofilm development on abiotic surfaces is a dynamic process, which typically proceeds through an initial phase of adhesion of plankntonic microbes to the substrate, followed by events such as growth, maturation and EPS secretion. However, the coupling of hydrodynamics, microbial adhesion and biofilm growth remain poorly understood. Here, we investigate the effect of semiconfined features on biofilm formation. Using a microfluidic device and fluorescent time-lapse microscopy, we establish that confinement features can significantly affect biofilm formation. Biofilm dynamics change not only as a function of confinement features, but also of the total fluid flow rate, and our combination of experimental results and numerical simulations reveal insights into the link between hydrodynamics and biofilm formation.

  7. SOLAR MAGNETIC TRACKING. IV. THE DEATH OF MAGNETIC FEATURES

    SciTech Connect

    Lamb, D. A.; Howard, T. A.; DeForest, C. E.; Parnell, C. E.; Welsch, B. T.

    2013-09-10

    The removal of magnetic flux from the quiet-Sun photosphere is important for maintaining the statistical steady state of the magnetic field there, for determining the magnetic flux budget of the Sun, and for estimating the rate of energy injected into the upper solar atmosphere. Magnetic feature death is a measurable proxy for the removal of detectable flux, either by cancellation (submerging or rising loops, or reconnection in the photosphere) or by dispersal of flux. We used the SWAMIS feature tracking code to understand how nearly 2 Multiplication-Sign 10{sup 4} magnetic features die in an hour-long sequence of Hinode/SOT/NFI magnetograms of a region of the quiet Sun. Of the feature deaths that remove visible magnetic flux from the photosphere, the vast majority do so by a process that merely disperses the previously detected flux so that it is too small and too weak to be detected, rather than completely eliminating it. The behavior of the ensemble average of these dispersals is not consistent with a model of simple planar diffusion, suggesting that the dispersal is constrained by the evolving photospheric velocity field. We introduce the concept of the partial lifetime of magnetic features, and show that the partial lifetime due to Cancellation of magnetic flux, 22 hr, is three times slower than previous measurements of the flux turnover time. This indicates that prior feature-based estimates of the flux replacement time may be too short, in contrast with the tendency for this quantity to decrease as resolution and instrumentation have improved. This suggests that dispersal of flux to smaller scales is more important for the replacement of magnetic fields in the quiet Sun than observed bipolar cancellation. We conclude that processes on spatial scales smaller than those visible to Hinode dominate the processes of flux emergence and cancellation, and therefore also the quantity of magnetic flux that threads the photosphere.

  8. ARM News &#187; Feature Stories and Releases

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    6:00:04 +0000 http://www.arm.gov en Celebrating Climate Data&acirc;&euro;&trade;s Wild Blue Yonder Mon, 17 Oct 2016 06:00:04 +0000 Feature Stories and Releases http://www.arm.gov/news/features/post/38683 <img src="http://www.arm.gov/images/cms/18421619070_d5076c0287_k-1.jpg:100w" style="float:left;margin-right:5px;margin-bottom:5px"/><p>A decade ago ARM had no aircraft of its own and managed only a few instruments for aerial measurements. This October

  9. Triaxial Stress Distributions in Cu / low-k Interconnect Features

    SciTech Connect

    C Murray; P Besser; E Ryan; J Jordan-Sweet

    2011-12-31

    The distribution of triaxial stresses within single damascene Cu/organosilicate interconnect structures as a function of linewidth, ranging from 45 to 250 nm, was measured using x-ray diffraction. Least-squares minimization techniques were employed to determine the volume-averaged stress tensors of the Cu features. Longitudinal Cu stress values increased for linewidths below 100 nm, while transverse stresses decreased with decreasing linewidth below 100 nm due to the interplay between the Cu microstructure and the feature geometry. Large tensile out-of-plane stresses were observed in all of the lines demonstrating the constraint imposed by the barrier layers that encapsulate the Cu.

  10. New Features of the Hopper XE6 - Differences from Franklin

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    New Features of the Hopper XE6 New Features of the Hopper XE6 - Differences from Franklin While the Franklin and Hopper systems are both have similar programming environments and user software, there are some key architectural differences between the two systems. This page describes those differences and how they may improve your productivity. More Cores per Node and Multiple Sockets per Node Hopper has a total of 24 cores on each node. With more cores per node, you may want to explore adding

  11. Appendix SCR: Feature, Event, and Process Screening for PA

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    SCR-2014 Feature, Event, and Process Screening for PA United States Department of Energy Waste Isolation Pilot Plant Carlsbad Field Office Carlsbad, New Mexico Compliance Recertification Application 2014 Appendix SCR-2014 Feature, Event, and Process Screening for PA Table of Contents SCR-1.0 Introduction SCR-2.0 Basis for FEPs Screening Process SCR-2.1 Requirement for FEPs SCR-2.2 FEPs List Development for the CCA SCR-2.3 Criteria for Screening of FEPs and Categorization of Retained FEPs

  12. ORNL Lightweighting Research Featured on MotorWeek

    ScienceCinema

    None

    2014-06-03

    PBS MotorWeek, television's longest running automotive series, featured ORNL lightweighting research for vehicle applications in an episode that aired in early April 2014. The crew captured footage of research including development of new metal alloys, additive manufacturing, carbon fiber production, advanced batteries, power electronics components, and neutron imaging applications for materials evaluation.

  13. PARC Seminar Series featuring Don Bryant | Photosynthetic Antenna Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Center Don Bryant PARC Seminar Series featuring Don Bryant "Far-red light photoacclimation (FaRLiP) leads to extensive acclimative remodeling of photosynthetic apparatus in cyanobacteria." September 22, 2014 - 11:00am Washington University, Brauer Hall Room 12 View Seminar Here Don Bryant Bio Download Flyer Here

  14. PARC Seminar Series featuring Professor Martin Warren | Photosynthetic

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Antenna Research Center Professor Martin Warren PARC Seminar Series featuring Professor Martin Warren October 19, 2016 - 4:00pm Rebstock 322 Join us in welcoming Professor Martin Warren from University of Kent in the UK to Washington University in St. Louis. You can view the seminar live online at: wustl.adobeconnect.com/parc View Bio Here View Flyer Here Seminars

  15. ORNL Lightweighting Research Featured on MotorWeek

    SciTech Connect

    2014-04-15

    PBS MotorWeek, television's longest running automotive series, featured ORNL lightweighting research for vehicle applications in an episode that aired in early April 2014. The crew captured footage of research including development of new metal alloys, additive manufacturing, carbon fiber production, advanced batteries, power electronics components, and neutron imaging applications for materials evaluation.

  16. Safety Functions and Other Features of Lethal Activated Denial Systems

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    STD-1193-2010 April 2010 DOE STANDARD Safety Functions and Other Features of Lethal Activated Denial Systems U.S. Department of Energy AREA SAFT Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. NOT MEASUREMENT SENSITIVE DOE-STD-1193-2010 i TABLE OF CONTENTS FOREWORD ...................................................................................................................... ii 1. SCOPE AND PURPOSE

  17. Star formation relations in nearby molecular clouds

    SciTech Connect

    Evans, Neal J. II; Heiderman, Amanda; Vutisalchavakul, Nalin

    2014-02-20

    We test some ideas for star formation relations against data on local molecular clouds. On a cloud by cloud basis, the relation between the surface density of star formation rate and surface density of gas divided by a free-fall time, calculated from the mean cloud density, shows no significant correlation. If a crossing time is substituted for the free-fall time, there is even less correlation. Within a cloud, the star formation rate volume and surface densities increase rapidly with the corresponding gas densities, faster than predicted by models using the free-fall time defined from the local density. A model in which the star formation rate depends linearly on the mass of gas above a visual extinction of 8 mag describes the data on these clouds, with very low dispersion. The data on regions of very massive star formation, with improved star formation rates based on free-free emission from ionized gas, also agree with this linear relation.

  18. Estimating Missing Features to Improve Multimedia Information Retrieval

    SciTech Connect

    Bagherjeiran, A; Love, N S; Kamath, C

    2006-09-28

    Retrieval in a multimedia database usually involves combining information from different modalities of data, such as text and images. However, all modalities of the data may not be available to form the query. The retrieval results from such a partial query are often less than satisfactory. In this paper, we present an approach to complete a partial query by estimating the missing features in the query. Our experiments with a database of images and their associated captions show that, with an initial text-only query, our completion method has similar performance to a full query with both image and text features. In addition, when we use relevance feedback, our approach outperforms the results obtained using a full query.

  19. Biosensor method and system based on feature vector extraction

    DOEpatents

    Greenbaum, Elias; Rodriguez, Jr., Miguel; Qi, Hairong; Wang, Xiaoling

    2013-07-02

    A system for biosensor-based detection of toxins includes providing at least one time-dependent control signal generated by a biosensor in a gas or liquid medium, and obtaining a time-dependent biosensor signal from the biosensor in the gas or liquid medium to be monitored or analyzed for the presence of one or more toxins selected from chemical, biological or radiological agents. The time-dependent biosensor signal is processed to obtain a plurality of feature vectors using at least one of amplitude statistics and a time-frequency analysis. At least one parameter relating to toxicity of the gas or liquid medium is then determined from the feature vectors based on reference to the control signal.

  20. Biosensor method and system based on feature vector extraction

    DOEpatents

    Greenbaum, Elias; Rodriguez, Jr., Miguel; Qi, Hairong; Wang, Xiaoling

    2012-04-17

    A method of biosensor-based detection of toxins comprises the steps of providing at least one time-dependent control signal generated by a biosensor in a gas or liquid medium, and obtaining a time-dependent biosensor signal from the biosensor in the gas or liquid medium to be monitored or analyzed for the presence of one or more toxins selected from chemical, biological or radiological agents. The time-dependent biosensor signal is processed to obtain a plurality of feature vectors using at least one of amplitude statistics and a time-frequency analysis. At least one parameter relating to toxicity of the gas or liquid medium is then determined from the feature vectors based on reference to the control signal.

  1. Spatial feature tracking impedence sensor using multiple electric fields

    DOEpatents

    Novak, J.L.

    1998-08-11

    Linear and other features on a workpiece are tracked by measuring the fields generated between electrodes arrayed in pairs. One electrode in each pair operates as a transmitter and the other as a receiver, and both electrodes in a pair are arrayed on a carrier. By combining and subtracting fields between electrodes in one pair and between a transmitting electrode in one pair and a receiving electrode in another pair, information describing the location and orientation of the sensor relative to the workpiece in up to six degrees of freedom may be obtained. Typical applications will measure capacitance, but other impedance components may be measured as well. The sensor is designed to track a linear feature axis or a protrusion or pocket in a workpiece. Seams and ridges can be tracked by this non-contact sensor. The sensor output is useful for robotic applications. 10 figs.

  2. Spatial feature tracking impedence sensor using multiple electric fields

    DOEpatents

    Novak, James L.

    1998-01-01

    Linear and other features on a workpiece are tracked by measuring the fields generated between electrodes arrayed in pairs. One electrode in each pair operates as a transmitter and the other as a receiver, and both electrodes in a pair are arrayed on a carrier. By combining and subtracting fields between electrodes in one pair and between a transmitting electrode in one pair and a receiving electrode in another pair, information describing the location and orientation of the sensor relative to the workpiece in up to six degrees of freedom may be obtained. Typical applications will measure capacitance, but other impedance components may be measured as well. The sensor is designed to track a linear feature axis or a protrusion or pocket in a workpiece. Seams and ridges can be tracked by this non-contact sensor. The sensor output is useful for robotic applications.

  3. Identification of features in indexed data and equipment therefore

    DOEpatents

    Jarman, Kristin H [Richland, WA; Daly, Don Simone [Richland, WA; Anderson, Kevin K [Richland, WA; Wahl, Karen L [Richland, WA

    2002-04-02

    Embodiments of the present invention provide methods of identifying a feature in an indexed dataset. Such embodiments encompass selecting an initial subset of indices, the initial subset of indices being encompassed by an initial window-of-interest and comprising at least one beginning index and at least one ending index; computing an intensity weighted measure of dispersion for the subset of indices using a subset of responses corresponding to the subset of indices; and comparing the intensity weighted measure of dispersion to a dispersion critical value determined from an expected value of the intensity weighted measure of dispersion under a null hypothesis of no transient feature present. Embodiments of the present invention also encompass equipment configured to perform the methods of the present invention.

  4. NREL Earth Day Celebration Features Energy Activities, Tours

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Features Energy Activities, Tours For more information contact: e:mail: Public Affairs Golden, Colo., April 12, 1999 — Celebrate Earth Day by discovering the power of clean energy at the nation's premier laboratory for renewable energy and energy efficiency research, development and deployment. The U.S. Department of Energy's National Renewable Energy Laboratory (NREL) will open its doors 10 a.m. to 3 p.m., April 24 for tours of its research facilities and interactive exhibits at the Visitors

  5. Identifying Transition State Features of Enzymatic Conformational Cycles |

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Stanford Synchrotron Radiation Lightsource Identifying Transition State Features of Enzymatic Conformational Cycles Thursday, January 5, 2012 - 11:00am SSRL Conference Room 137-322 Dr. Dimitar Pachov, HHMI Research Associate, Kern's Group, Brandeis University, MA Due to their dynamic nature relevant to biological activity, biomolecules frequently interconvert between functional substates. Determining how these visits to different conformational states are physically characterized remains a

  6. Geographical features of global water cycle during warm geological epochs

    SciTech Connect

    Georgiadi, A.G.

    1996-12-31

    The impact of global warming on the water cycle can be extremely complex and diverse. The goal of the investigation was to estimate the geographic features of the mean annual water budget of the world during climatic optimums of the Holocene and the Eemian interglacial periods. These geological epochs could be used as analogs of climatic warming on 1 degree, centigrade and 2 degrees, centigrade. The author used the results of climatic reconstructions based on a simplified version of a GCM.

  7. Village Power Exhibit Featured at NREL's Visitors Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Village Power Exhibit Featured at NREL's Visitors Center "Powering Our Lives, Powering Our World Energy" Expo Slated for February-April For more information contact: Gary Schmitz, 303-275-4050 email: Gary Schmitz Golden, Colo., Feb. 16, 2001 - An exhibit that demonstrates how renewable energy sources can bring needed electricity to developing nations worldwide opens Feb. 20 at the Visitors Center of the U.S. Department of Energy's National Renewable Energy Laboratory. The Village Power

  8. Absorption Features in Spectra of Magnetized Neutron Stars

    SciTech Connect

    Suleimanov, V.; Hambaryan, V.; Neuhaeuser, R.; Potekhin, A. Y.; Pavlov, G. G.; Adelsberg, M. van; Werner, K.

    2011-09-21

    The X-ray spectra of some magnetized isolated neutron stars (NSs) show absorption features with equivalent widths (EWs) of 50-200 eV, whose nature is not yet well known.To explain the prominent absorption features in the soft X-ray spectra of the highly magnetized (B{approx}10{sup 14} G) X-ray dim isolated NSs (XDINSs), we theoretically investigate different NS local surface models, including naked condensed iron surfaces and partially ionized hydrogen model atmospheres, with semi-infinite and thin atmospheres above the condensed surface. We also developed a code for computing light curves and integral emergent spectra of magnetized neutron stars with various temperature and magnetic field distributions over the NS surface. We compare the general properties of the computed and observed light curves and integral spectra for XDINS RBS 1223 and conclude that the observations can be explained by a thin hydrogen atmosphere above the condensed iron surface, while the presence of a strong toroidal magnetic field component on the XDINS surface is unlikely.We suggest that the harmonically spaced absorption features in the soft X-ray spectrum of the central compact object (CCO) 1E 1207.4-5209 (hereafter 1E 1207) correspond to peaks in the energy dependence of the free-free opacity in a quantizing magnetic field, known as quantum oscillations. To explore observable properties of these quantum oscillations, we calculate models of hydrogen NS atmospheres with B{approx}10{sup 10}-10{sup 11} G(i.e., electron cyclotron energy E{sub c,e}{approx}0.1-1 keV) and T{sub eff} = 1-3 MK. Such conditions are thought to be typical for 1E 1207. We show that observable features at the electron cyclotron harmonics with EWs {approx_equal}100-200 eV can arise due to these quantum oscillations.

  9. An Ontology Design Pattern for Surface Water Features

    SciTech Connect

    Sinha, Gaurav; Mark, David; Kolas, Dave; Varanka, Dalia; Romero, Boleslo E; Feng, Chen-Chieh; Usery, Lynn; Liebermann, Joshua; Sorokine, Alexandre

    2014-01-01

    Surface water is a primary concept of human experience but concepts are captured in cultures and languages in many different ways. Still, many commonalities can be found due to the physical basis of many of the properties and categories. An abstract ontology of surface water features based only on those physical properties of landscape features has the best potential for serving as a foundational domain ontology. It can then be used to systematically incor-porate concepts that are specific to a culture, language, or scientific domain. The Surface Water ontology design pattern was developed both for domain knowledge distillation and to serve as a conceptual building-block for more complex surface water ontologies. A fundamental distinction is made in this on-tology between landscape features that act as containers (e.g., stream channels, basins) and the bodies of water (e.g., rivers, lakes) that occupy those containers. Concave (container) landforms semantics are specified in a Dry module and the semantics of contained bodies of water in a Wet module. The pattern is imple-mented in OWL, but Description Logic axioms and a detailed explanation is provided. The OWL ontology will be an important contribution to Semantic Web vocabulary for annotating surface water feature datasets. A discussion about why there is a need to complement the pattern with other ontologies, es-pecially the previously developed Surface Network pattern is also provided. Fi-nally, the practical value of the pattern in semantic querying of surface water datasets is illustrated through a few queries and annotated geospatial datasets.

  10. Features of an Atkinson two-stroke engine

    SciTech Connect

    Brooks, J.; Lane, A.

    1994-09-01

    A two-stroke Atkinson cycle engine is described. The engine has uniflow stratified mixture scavenging with a variably phased spherical rotary valve in the cylinder head and exhaust ports in the cylinder wall. These features combined in this configuration result in reduced fuel consumption, higher specific power output, less vibration, and smooth part load operation albeit increased size and cost compared to simple two-stroke engines used in power tools. 29 refs., 4 figs., 1 tab.

  11. Arapahoe Community College Science and Technical Programs featured at OSTI

    Office of Scientific and Technical Information (OSTI)

    Community College Connections | OSTI, US Dept of Energy Office of Scientific and Technical Information Arapahoe Community College Science and Technical Programs featured at OSTI Community College Connections Back to the OSTI News Listing for 2011 Energy Technology programs are offered now at Arapahoe Community College: Solar Photovoltaic Systems Technician Certificate Solar Thermal System Technician Certificate Energy Analyst (Auditor) Certificate Construction Supervision AAS Degree LEED

  12. Citations from the Atmospheric Radiation Measurement (ARM) Program Featured

    Office of Scientific and Technical Information (OSTI)

    at OSTI's DOE Data Explorer | OSTI, US Dept of Energy Office of Scientific and Technical Information Citations from the Atmospheric Radiation Measurement (ARM) Program Featured at OSTI's DOE Data Explorer Back to the OSTI News Listing for 2008 Now you can find additional citations from the Atmospheric Radiation Measurement (ARM) Program at the DOE Data Explorer. ARM, a key contributor to national and international research efforts related to global climate change, is a multi-laboratory,

  13. University of Illinois featured at the OSTI .EDUconnections website | OSTI,

    Office of Scientific and Technical Information (OSTI)

    US Dept of Energy Office of Scientific and Technical Information University of Illinois featured at the OSTI .EDUconnections website Back to the OSTI News Listing for 2010 Connect to DOE-related research at the University of Illinois when you visit .EDUconnections. Learn about professors of interest and the institution's exceptional students, and find remarkable innovations in research. Quick links are available at .EDUconnections to DOE grants, internships, fellowships and scholarships, and

  14. Wolfgang Panofsky dead at 88, bibliography featured at Energy Citations

    Office of Scientific and Technical Information (OSTI)

    Database | OSTI, US Dept of Energy Office of Scientific and Technical Information Wolfgang Panofsky dead at 88, bibliography featured at Energy Citations Database Back to the OSTI News Listing for 2007 Wolfgang K. H. "Pief", Panofsky, a renowned particle physics researcher, accelerator builder, outspoken arms control advocate, and administrator of basic research, died September 25, 2007. Dr. Panofsky was awarded the National Medal of Science in 1969 and the U.S. Department of

  15. NASA features LLNL star-formation simulations | National Nuclear Security

    National Nuclear Security Administration (NNSA)

    Administration | (NNSA) NASA features LLNL star-formation simulations Friday, January 29, 2016 - 5:56pm NNSA Blog These high performance computing (HPC) simulations of star formation account for a broad range of physical processes, including: gravity, supersonic turbulence, hydrodynamics, outflows, magnetic fields, chemistry and ionizing and non-ionizing radiation. Image courtesy of Pak Shing Li/ University of California, Berkeley High performance computing (HPC) simulations exploring star

  16. NREL: A Year in Clean Energy Innovations; A Review of NREL's 2011 Feature Stories

    SciTech Connect

    Not Available

    2012-04-01

    This document is a compilation of articles featuring NREL research and development, deployment, commercialization, and outreach activities in 2011. The feature stories can be found online at http:www.nrel.gov/features/.

  17. Deep PDF parsing to extract features for detecting embedded malware.

    SciTech Connect

    Munson, Miles Arthur; Cross, Jesse S.

    2011-09-01

    The number of PDF files with embedded malicious code has risen significantly in the past few years. This is due to the portability of the file format, the ways Adobe Reader recovers from corrupt PDF files, the addition of many multimedia and scripting extensions to the file format, and many format properties the malware author may use to disguise the presence of malware. Current research focuses on executable, MS Office, and HTML formats. In this paper, several features and properties of PDF Files are identified. Features are extracted using an instrumented open source PDF viewer. The feature descriptions of benign and malicious PDFs can be used to construct a machine learning model for detecting possible malware in future PDF files. The detection rate of PDF malware by current antivirus software is very low. A PDF file is easy to edit and manipulate because it is a text format, providing a low barrier to malware authors. Analyzing PDF files for malware is nonetheless difficult because of (a) the complexity of the formatting language, (b) the parsing idiosyncrasies in Adobe Reader, and (c) undocumented correction techniques employed in Adobe Reader. In May 2011, Esparza demonstrated that PDF malware could be hidden from 42 of 43 antivirus packages by combining multiple obfuscation techniques [4]. One reason current antivirus software fails is the ease of varying byte sequences in PDF malware, thereby rendering conventional signature-based virus detection useless. The compression and encryption functions produce sequences of bytes that are each functions of multiple input bytes. As a result, padding the malware payload with some whitespace before compression/encryption can change many of the bytes in the final payload. In this study we analyzed a corpus of 2591 benign and 87 malicious PDF files. While this corpus is admittedly small, it allowed us to test a system for collecting indicators of embedded PDF malware. We will call these indicators features throughout

  18. On enabling secure applications through off-line biometric identification

    SciTech Connect

    Davida, G.I.; Frankel, Y.; Matt, B.J.

    1998-04-01

    In developing secure applications and systems, the designers often must incorporate secure user identification in the design specification. In this paper, the authors study secure off line authenticated user identification schemes based on a biometric system that can measure a user`s biometric accurately (up to some Hamming distance). The schemes presented here enhance identification and authorization in secure applications by binding a biometric template with authorization information on a token such as a magnetic strip. Also developed here are schemes specifically designed to minimize the compromise of a user`s private biometrics data, encapsulated in the authorization information, without requiring secure hardware tokens. In this paper the authors furthermore study the feasibility of biometrics performing as an enabling technology for secure system and application design. The authors investigate a new technology which allows a user`s biometrics to facilitate cryptographic mechanisms.

  19. FEATURE: Finite-Element Analysis Tool for Utility Rotordynamic Evaluation. Volume 2. FEATURE/COJOUR workshop notes

    SciTech Connect

    Lee, C.C.; Tecza, J.; Zorzi, E.S.

    1985-05-01

    The FEATURE computer program (Finite-Element Analysis Tool for Utility Rotordynamic Evaluation) is a flexible, user-oriented tool for analysis of rotor-bearing systems. The program performs linear critical speed, damped response, and stability calculations for a wide range of rotor geometries, including multiple, concentric, counterrotating spools and large, multispan, rigidly coupled rotors. A finite-element formulation gives the program excellent numerical stability and the use of static substructuring greatly reduces run time. The COJOUR computer program is to provide a technically sound means for determining dynamic coefficients for use in the FEATURE code. It is capable of solving a wide variety of fluid film journal bearing configuration including both fixed-pad and tiling-pad types with or without thermal effects. The program will give comprehensive output such as load capacity, power loss, stiffness and dampling coefficients, etc.

  20. HUBBLE SPACE TELESCOPE ACS IMAGING OF THE GOALS SAMPLE: QUANTITATIVE STRUCTURAL PROPERTIES OF NEARBY LUMINOUS INFRARED GALAXIES WITH L{sub IR} > 10{sup 11.4} L{sub Sun}

    SciTech Connect

    Kim, D.-C.; Evans, A. S.; Privon, G. C. E-mail: aevans@virginia.edu; and others

    2013-05-10

    A Hubble Space Telescope/Advanced Camera for Surveys study of the structural properties of 85 luminous and ultraluminous (L{sub IR} > 10{sup 11.4} L{sub Sun }) infrared galaxies (LIRGs and ULIRGs) in the Great Observatories All-sky LIRG Survey (GOALS) sample is presented. Two-dimensional GALFIT analysis has been performed on F814W ''I-band'' images to decompose each galaxy, as appropriate, into bulge, disk, central point-spread function (PSF) and stellar bar components. The fraction of bulge-less disk systems is observed to be higher in LIRGs (35%) than in ULIRGs (20%), with the disk+bulge systems making up the dominant fraction of both LIRGs (55%) and ULIRGs (45%). Further, bulge+disk systems are the dominant late-stage merger galaxy type and are the dominant type for LIRGs and ULIRGs at almost every stage of galaxy-galaxy nuclear separation. The mean I-band host absolute magnitude of the GOALS galaxies is -22.64 {+-} 0.62 mag (1.8{sup +1.4}{sub -0.4} L{sup *}{sub I}), and the mean bulge absolute magnitude in GOALS galaxies is about 1.1 mag fainter than the mean host magnitude. Almost all ULIRGs have bulge magnitudes at the high end (-20.6 to -23.5 mag) of the GOALS bulge magnitude range. Mass ratios in the GOALS binary systems are consistent with most of the galaxies being the result of major mergers, and an examination of the residual-to-host intensity ratios in GOALS binary systems suggests that smaller companions suffer more tidal distortion than the larger companions. We find approximately twice as many bars in GOALS disk+bulge systems (32.8%) than in pure-disk mergers (15.9%) but most of the disk+bulge systems that contain bars are disk-dominated with small bulges. The bar-to-host intensity ratio, bar half-light radius, and bar ellipticity in GOALS galaxies are similar to those found in nearby spiral galaxies. The fraction of stellar bars decreases toward later merger stages and smaller nuclear separations, indicating that bars are destroyed as the merger

  1. SolarPILOT Feature Requests and Collaboration | Concentrating Solar Power |

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    NREL SolarPILOT Feature Requests and Collaboration NREL works with the DOE to identify priority areas for continued SolarPILOT(tm) and SolTrace(tm) development. This work is rigorously reviewed and competitively awarded under the SunShot National Laboratory Multiyear Partnership (SuNLaMP) proposal development process, and the development work resulting from this process reflects the assessment by NREL and DOE of the CSP community's needs. If users are interested in working with NREL to

  2. 5f Magnetism--Specific Features And Boundaries

    SciTech Connect

    Havela, Ladislav; Maskova, Silvie; Adamska, Anna; Pesicka, J.; Andreev, Alexander V.; Shick, Alexander; Gouder, Thomas; Kim-Ngan, N.-H.; Balogh, Adam G.

    2011-06-30

    Magnetism of light actinides exhibits fascinating and potentially useful features. One of them is a giant anisotropy of the two-ion type, apparent mostly in U-based systems. Here we demonstrate on the example of U{sub 2}Ni{sub 2}Sn and its hydride the anisotropy switches over the direction of U moments on a very fine scale. The study of amorphous sputter deposited UFe{sub x} films reveals how the Curie temperature can be tuned so as to exceed the room temperature.

  3. Photovoltaic building sheathing element with anti-slide features

    SciTech Connect

    Keenihan, James R.; Langmaid, Joseph A.; Lopez, Leonardo C.

    2015-09-08

    The present invention is premised` upon an assembly that includes at least a photovoltaic building sheathing element capable of being affixed on a building structure, the photovoltaic building sheathing element. The element including a photovoltaic cell assembly, a body portion attached to one or more portions of the photovoltaic cell assembly; and at feast a first and a second connector assembly capable of directly or indirectly electrically connecting the photovoltaic cell assembly to one or more adjoining devices; wherein the body portion includes one or more geometric features adapted to engage a vertically adjoining device before installation.

  4. Special Feature: Reducing Energy Costs with Better Batteries

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Reducing Energy Costs with Better Batteries Special Feature: Reducing Energy Costs with Better Batteries September 9, 2013 Contact: Linda Vu, +1 510 495 2402, lvu@lbl.gov Electricvehicles8331019248.jpg Electric vehicles lined up in Cascade Locks. Credit: Oregon Department of Transportation A better battery-one that is cheap and safe, but packs a lot of power-could lead to an electric vehicle that performs better than today's gasoline-powered cars, and costs about the same or less to consumers.

  5. Features of photoconversion in highly efficient silicon solar cells

    SciTech Connect

    Sachenko, A. V.; Shkrebtii, A. I.; Korkishko, R. M.; Kostylyov, V. P.; Kulish, N. R.; Sokolovskyi, I. O.

    2015-02-15

    The photoconversion efficiency η in highly efficient silicon-based solar cells (SCs) is analyzed depending on the total surface-recombination rate S{sub s} on illuminated and rear surfaces. Solar cells based on silicon p-n junctions and α-Si:H or α-SiC:H-Si heterojunctions (so-called HIT structures) are considered in a unified approach. It is shown that a common feature of these SCs is an increased open-circuit voltage V{sub oc} associated with an additional contribution of the rear surface. Within an approach based on analysis of the physical features of photoconversion in SCs, taking into account the main recombination mechanisms, including Shockley-Read-Hall recombination, radiative recombination, surface recombination, recombination in the space-charge region, and band-to-band Auger recombination, expressions for the photoconversion efficiency of such SCs are obtained. The developed theory is compared with experiments, including those for SCs with record parameters, e.g., η = 25% and 24.7% for SCs with a p-n junction for HIT structures, respectively, under AM1.5 conditions. By comparing theory and experiment, the values of S{sub s} achieved as a result of recombination-loss minimization by various methods are determined. The results of calculations of the maximum possible value η{sub max} in silicon SCs are compared with the data of other papers. Good agreement is observed.

  6. Primordial features due to a step in the inflaton potential

    SciTech Connect

    Hazra, Dhiraj Kumar; Sriramkumar, L.; Aich, Moumita; Souradeep, Tarun; Jain, Rajeev Kumar E-mail: moumita@iucaa.ernet.in E-mail: sriram@hri.res.in

    2010-10-01

    Certain oscillatory features in the primordial scalar power spectrum are known to provide a better fit to the outliers in the cosmic microwave background data near the multipole moments of l = 22 and 40. These features are usually generated by introducing a step in the popular, quadratic potential describing the canonical scalar field. Such a model will be ruled out, if the tensors remain undetected at a level corresponding to a tensor-to-scalar ratio of, say, r ≅ 0.1. In this work, in addition to the popular quadratic potential, we investigate the effects of the step in a small field model and a tachyon model. With possible applications to future datasets (such as PLANCK) in mind, we evaluate the tensor power spectrum exactly, and include its contribution in our analysis. We compare the models with the WMAP (five as well as seven-year), the QUaD and the ACBAR data. As expected, a step at a particular location and of a suitable magnitude and width is found to improve the fit to the outliers (near l = 22 and 40) in all these cases. We point out that, if the tensors prove to be small (say, r∼<0.01), the quadratic potential and the tachyon model will cease to be viable, and more attention will need to be paid to examples such as the small field models.

  7. THE THOMSON SURFACE. III. TRACKING FEATURES IN 3D

    SciTech Connect

    Howard, T. A.; DeForest, C. E.; Tappin, S. J.; Odstrcil, D.

    2013-03-01

    In this, the final installment in a three-part series on the Thomson surface, we present simulated observations of coronal mass ejections (CMEs) observed by a hypothetical polarizing white light heliospheric imager. Thomson scattering yields a polarization signal that can be exploited to locate observed features in three dimensions relative to the Thomson surface. We consider how the appearance of the CME changes with the direction of trajectory, using simulations of a simple geometrical shape and also of a more realistic CME generated using the ENLIL model. We compare the appearance in both unpolarized B and polarized pB light, and show that there is a quantifiable difference in the measured brightness of a CME between unpolarized and polarized observations. We demonstrate a technique for using this difference to extract the three-dimensional (3D) trajectory of large objects such as CMEs. We conclude with a discussion on how a polarizing heliospheric imager could be used to extract 3D trajectory information about CMEs or other observed features.

  8. FEATURES, EVENTS, AND PROCESSES: SYSTEM-LEVEL AND CRITICALITY

    SciTech Connect

    D.L. McGregor

    2000-12-20

    The primary purpose of this Analysis/Model Report (AMR) is to identify and document the screening analyses for the features, events, and processes (FEPs) that do not easily fit into the existing Process Model Report (PMR) structure. These FEPs include the 3 1 FEPs designated as System-Level Primary FEPs and the 22 FEPs designated as Criticality Primary FEPs. A list of these FEPs is provided in Section 1.1. This AMR (AN-WIS-MD-000019) documents the Screening Decision and Regulatory Basis, Screening Argument, and Total System Performance Assessment (TSPA) Disposition for each of the subject Primary FEPs. This AMR provides screening information and decisions for the TSPA-SR report and provides the same information for incorporation into a project-specific FEPs database. This AMR may also assist reviewers during the licensing-review process.

  9. Features, Events and Processes in UZ Flow and Transport

    SciTech Connect

    P. Persoff

    2005-08-04

    The purpose of this report is to evaluate and document the inclusion or exclusion of the unsaturated zone (UZ) features, events, and processes (FEPs) with respect to modeling that supports the total system performance assessment (TSPA) for license application (LA) for a nuclear waste repository at Yucca Mountain, Nevada. A screening decision, either Included or Excluded, is given for each FEP, along with the technical basis for the screening decision. This information is required by the U.S. Nuclear Regulatory Commission (NRC) in 10 CFR 63.114 (d, e, and f) [DIRS 173273]. The FEPs deal with UZ flow and radionuclide transport, including climate, surface water infiltration, percolation, drift seepage, and thermally coupled processes. This analysis summarizes the implementation of each FEP in TSPA-LA (that is, how the FEP is included) and also provides the technical basis for exclusion from TSPA-LA (that is, why the FEP is excluded). This report supports TSPA-LA.

  10. Features, Events, and Processes in UZ and Transport

    SciTech Connect

    P. Persoff

    2004-11-06

    The purpose of this report is to evaluate and document the inclusion or exclusion of the unsaturated zone (UZ) features, events, and processes (FEPs) with respect to modeling that supports the total system performance assessment (TSPA) for license application (LA) for a nuclear waste repository at Yucca Mountain, Nevada. A screening decision, either ''Included'' or ''Excluded'', is given for each FEP, along with the technical basis for the screening decision. This information is required by the U.S. Nuclear Regulatory Commission (NRC) in 10 CFR 63.114 (d, e, and f) [DIRS 156605]. The FEPs deal with UZ flow and radionuclide transport, including climate, surface water infiltration, percolation, drift seepage, and thermally coupled processes. This analysis summarizes the implementation of each FEP in TSPA-LA (that is, how the FEP is included) and also provides the technical basis for exclusion from TSPA-LA (that is, why the FEP is excluded). This report supports TSPA-LA.

  11. Generic features of Einstein-Aether black holes

    SciTech Connect

    Tamaki, Takashi; Miyamoto, Umpei

    2008-01-15

    We reconsider spherically symmetric black hole solutions in Einstein-Aether theory with the condition that this theory has identical parametrized post-Newtonian parameters as those for general relativity, which is the main difference from the previous research. In contrast with previous study, we allow superluminal propagation of a spin-0 Aether-gravity wave mode. As a result, we obtain black holes having a spin-0 'horizon' inside an event horizon. We allow a singularity at a spin-0 horizon since it is concealed by the event horizon. If we allow such a configuration, the kinetic term of the Aether field can be large enough for black holes to be significantly different from Schwarzschild black holes with respect to Arnowitt-Deser-Misner mass, innermost stable circular orbit, Hawking temperature, and so on. We also discuss whether or not the above features can be seen in more generic vector-tensor theories.

  12. Multispectral image feature fusion for detecting land mines

    SciTech Connect

    Clark, G.A.; Fields, D.J.; Sherwood, R.J.

    1994-11-15

    Our system fuses information contained in registered images from multiple sensors to reduce the effect of clutter and improve the the ability to detect surface and buried land mines. The sensor suite currently consists if a camera that acquires images in sixible wavelength bands, du, dual-band infrared (5 micron and 10 micron) and ground penetrating radar. Past research has shown that it is extremely difficult to distinguish land mines from background clutter in images obtained from a single sensor. It is hypothesized, however, that information fused from a suite of various sensors is likely to provide better detection reliability, because the suite of sensors detects a variety of physical properties that are more separate in feature space. The materials surrounding the mines can include natural materials (soil, rocks, foliage, water, holes made by animals and natural processes, etc.) and some artifacts.

  13. Non-contact feature detection using ultrasonic Lamb waves

    DOEpatents

    Sinha, Dipen N.

    2011-06-28

    Apparatus and method for non-contact ultrasonic detection of features on or within the walls of hollow pipes are described. An air-coupled, high-power ultrasonic transducer for generating guided waves in the pipe wall, and a high-sensitivity, air-coupled transducer for detecting these waves, are disposed at a distance apart and at chosen angle with respect to the surface of the pipe, either inside of or outside of the pipe. Measurements may be made in reflection or transmission modes depending on the relative position of the transducers and the pipe. Data are taken by sweeping the frequency of the incident ultrasonic waves, using a tracking narrow-band filter to reduce detected noise, and transforming the frequency domain data into the time domain using fast Fourier transformation, if required.

  14. Features of MCNP6 Relevant to Medical Radiation Physics

    SciTech Connect

    Hughes, H. Grady III; Goorley, John T.

    2012-08-29

    MCNP (Monte Carlo N-Particle) is a general-purpose Monte Carlo code for simulating the transport of neutrons, photons, electrons, positrons, and more recently other fundamental particles and heavy ions. Over many years MCNP has found a wide range of applications in many different fields, including medical radiation physics. In this presentation we will describe and illustrate a number of significant recently-developed features in the current version of the code, MCNP6, having particular utility for medical physics. Among these are major extensions of the ability to simulate large, complex geometries, improvement in memory requirements and speed for large lattices, introduction of mesh-based isotopic reaction tallies, advances in radiography simulation, expanded variance-reduction capabilities, especially for pulse-height tallies, and a large number of enhancements in photon/electron transport.

  15. Centrifugal Casting Features/Metallurgical Characterization of Aluminum Alloys

    SciTech Connect

    Chirita, G.; Soares, D.; Cruz, D.; Silva, F. S. [Mechanical Engineering Department, School of Engineering, Minho University (Portugal); Stefanescu, I. [Faculty of Mechanical Engineering, Dunarea de Jos University Galati (Romania)

    2008-02-15

    This paper deals with the study of centrifugal effects on aluminium castings under high G values. Most of the studies in this domain (FGMs obtained by centrifugal casting) deal with functionally graded composites reinforced with a solid phase such as silicon particles or others. However, in this study it will be shown that unreinforced aluminium alloys may be significantly influenced by the centrifugal effect and that functionally graded castings are also obtained. It has been observed that the centrifugal effect may increase in some alloys, depending on the relative position in the castings, the rupture strength by approx. 50%, and rupture strain by about 300%, as compared to the gravity casting technique. The Young's modulus may also increase by about 20%. It has also been reported that in vertical centrifugal castings there are mainly three aspects that affect the components thus obtained, namely: fluid dynamics; vibration (inherent to the system); and centrifugal force. These features have a different effect on the castings depending on the aluminium alloy. In this paper, an analysis of the most important effects of the centrifugal casting process on metallurgical features is conducted. A solidification characterization at several points along the mould will be made in order to have an accurate idea of both the fluid dynamics inside the mould during the casting and the solidification behavior in different parts of the component. These two analyses will be related to the metallurgical properties (phase distribution; SDAS; eutectic silicon content and shape, pores density and shape) along the component and mainly along the direction of the centrifugal pressure. A comparison between castings obtained by both centrifugal casting technique and gravity casting technique is made for reference (gravity casting)

  16. Automated feature detection and identification in digital point-ordered signals

    DOEpatents

    Oppenlander, Jane E.; Loomis, Kent C.; Brudnoy, David M.; Levy, Arthur J.

    1998-01-01

    A computer-based automated method to detect and identify features in digital point-ordered signals. The method is used for processing of non-destructive test signals, such as eddy current signals obtained from calibration standards. The signals are first automatically processed to remove noise and to determine a baseline. Next, features are detected in the signals using mathematical morphology filters. Finally, verification of the features is made using an expert system of pattern recognition methods and geometric criteria. The method has the advantage that standard features can be, located without prior knowledge of the number or sequence of the features. Further advantages are that standard features can be differentiated from irrelevant signal features such as noise, and detected features are automatically verified by parameters extracted from the signals. The method proceeds fully automatically without initial operator set-up and without subjective operator feature judgement.

  17. Comparing Shape and Texture Features for Pattern Recognition in Simulation Data

    SciTech Connect

    Newsam, S; Kamath, C

    2004-12-10

    Shape and texture features have been used for some time for pattern recognition in datasets such as remote sensed imagery, medical imagery, photographs, etc. In this paper, we investigate shape and texture features for pattern recognition in simulation data. In particular, we explore which features are suitable for characterizing regions of interest in images resulting from fluid mixing simulations. Three texture features--gray level co-occurrence matrices, wavelets, and Gabor filters--and two shape features--geometric moments and the angular radial transform--are compared. The features are evaluated using a similarity retrieval framework. Our preliminary results indicate that Gabor filters perform the best among the texture features and the angular radial transform performs the best among the shape features. The feature which performs the best overall is dependent on how the groundtruth dataset is created.

  18. Imaging trace element distributions in single organelles and subcellular features

    DOE PAGES [OSTI]

    Kashiv, Yoav; Austin, Jotham R.; Lai, Barry; Rose, Volker; Vogt, Stefan; El-Muayed, Malek

    2016-02-25

    The distributions of chemical elements within cells are of prime importance in a wide range of basic and applied biochemical research. An example is the role of the subcellular Zn distribution in Zn homeostasis in insulin producing pancreatic beta cells and the development of type 2 diabetes mellitus. We combined transmission electron microscopy with micro- and nano-synchrotron X-ray fluorescence to image unequivocally for the first time, to the best of our knowledge, the natural elemental distributions, including those of trace elements, in single organelles and other subcellular features. Detected elements include Cl, K, Ca, Co, Ni, Cu, Zn and Cdmore » (which some cells were supplemented with). Cell samples were prepared by a technique that minimally affects the natural elemental concentrations and distributions, and without using fluorescent indicators.We find it could likely be applied to all cell types and provide new biochemical insights at the single organelle level not available from organelle population level studies.« less

  19. Basic features of the pion valence-quark distribution function

    DOE PAGES [OSTI]

    Chang, Lei; Mezrag, Cdric; Moutarde, Herv; Roberts, Craig D.; Rodrguez-Quintero, Jose; Tandy, Peter C.

    2014-10-07

    The impulse-approximation expression used hitherto to define the pion's valence-quark distribution function is flawed because it omits contributions from the gluons which bind quarks into the pion. A corrected leading-order expression produces the model-independent result that quarks dressed via the rainbowladder truncation, or any practical analogue, carry all the pion's light-front momentum at a characteristic hadronic scale. Corrections to the leading contribution may be divided into two classes, responsible for shifting dressed-quark momentum into glue and sea-quarks. Working with available empirical information, we use an algebraic model to express the principal impact of both classes of corrections. This enables amorerealistic comparison with experiment that allows us to highlight the basic features of the pion's measurable valence-quark distribution, q?(x); namely, at a characteristic hadronic scale, q?(x)~(1-x)2 for x?0.85; and the valence-quarks carry approximately two-thirds of the pion's light-front momentum.less

  20. Improved searching for spatial features in spatio-temporal data

    SciTech Connect

    Stockinger, Kurt; Wu, Kesheng

    2004-09-27

    Scientific data analysis often requires mining large databases or data warehouses to find features in space. One important task is to find regions of interest such as stellar objects in astrophysics or flame fronts in combustion studies. Typically, this task is performed in two steps. The first step (searching) identifies records satisfying certain conditions specified by the user and outputs a set of cells. The second step (region-growing) groups these cells into connected regions. Most common approaches essentially perform a brute-force scan for these arching step. A number of indexing schemes have been proposed to speed up the searching step. Because they usually also slow down the region-growing step, these schemes have not reduced the overall time. In this article, we propose an approach based on compressed bitmap indices. Our approach speeds up not only the searching step, but also the region-growing step. In the literature, the time complexity of the region-growing step is demonstrated to be linear in the number of records in the dataset. In our tests, we show that the response time of our region-growing algorithm is linear in the number of records close to the surface of the regions of interest which is a small subset of all cells.

  1. Features, Events, and Processes in SZ Flow and Transport

    SciTech Connect

    K. Economy

    2004-11-16

    This analysis report evaluates and documents the inclusion or exclusion of the saturated zone (SZ) features, events, and processes (FEPs) with respect to modeling used to support the total system performance assessment (TSPA) for license application (LA) of a nuclear waste repository at Yucca Mountain, Nevada. A screening decision, either ''Included'' or ''Excluded'', is given for each FEP along with the technical basis for the decision. This information is required by the U.S. Nuclear Regulatory Commission (NRC) at 10 CFR 63.114 (d), (e), (f) (DIRS 156605). This scientific report focuses on FEP analysis of flow and transport issues relevant to the SZ (e.g., fracture flow in volcanic units, anisotropy, radionuclide transport on colloids, etc.) to be considered in the TSPA model for the LA. For included FEPs, this analysis summarizes the implementation of the FEP in TSPA-LA (i.e., how the FEP is included). For excluded FEPs, this analysis provides the technical basis for exclusion from TSPA-LA (i.e., why the FEP is excluded).

  2. Features, Events, and Processes in SZ Flow and Transport

    SciTech Connect

    S. Kuzio

    2005-08-20

    This analysis report evaluates and documents the inclusion or exclusion of the saturated zone (SZ) features, events, and processes (FEPs) with respect to modeling used to support the total system performance assessment (TSPA) for license application (LA) of a nuclear waste repository at Yucca Mountain, Nevada. A screening decision, either Included or Excluded, is given for each FEP along with the technical basis for the decision. This information is required by the U.S. Nuclear Regulatory Commission (NRC) at 10 CFR 63.11(d), (e), (f) [DIRS 173273]. This scientific report focuses on FEP analysis of flow and transport issues relevant to the SZ (e.g., fracture flow in volcanic units, anisotropy, radionuclide transport on colloids, etc.) to be considered in the TSPA model for the LA. For included FEPs, this analysis summarizes the implementation of the FEP in TSPA-LA (i.e., how the FEP is included). For excluded FEPs, this analysis provides the technical basis for exclusion from TSPA-LA (i.e., why the FEP is excluded).

  3. Nickel-hydrogen battery with oxygen and electrolyte management features

    DOEpatents

    Sindorf, John F.

    1991-10-22

    A nickel-hydrogen battery or cell having one or more pressure vessels containing hydrogen gas and a plurality of cell-modules therein. Each cell-module includes a configuration of cooperatively associated oxygen and electrolyte mangement and component alignment features. A cell-module having electrolyte includes a negative electrode, a positive electrode adapted to facilitate oxygen diffusion, a separator disposed between the positive and negative electrodes for separating them and holding electrolyte for ionic conductivity, an absorber engaging the surface of the positive electrode facing away from the separator for providing electrolyte to the positive electrode, and a pair of surface-channeled diffusion screens for enclosing the positive and negative electrodes, absorber, and separator and for maintaining proper alignment of these components. The screens, formed in the shape of a pocket by intermittently sealing the edges together along as many as three sides, permit hydrogen gas to diffuse therethrough to the negative electrodes, and prevent the edges of the separator from swelling. Electrolyte is contained in the cell-module, absorbhed by the electrodes, the separator and the absorber.

  4. Cloud structure of the nearest brown dwarfs. II: High-amplitude variability for Luhman 16 A and B in and out of the 0.99 μm FeH feature

    SciTech Connect

    Buenzli, Esther; Marley, Mark S.; Apai, Daniel; Saumon, Didier; Biller, Beth A.; Crossfield, Ian J. M.; Radigan, Jacqueline

    2015-10-20

    The re-emergence of the 0.99 μm FeH feature in brown dwarfs of early- to mid-T spectral type has been suggested as evidence for cloud disruption where flux from deep, hot regions below the Fe cloud deck can emerge. The same mechanism could account for color changes at the L/T transition and photometric variability. We present the first observations of spectroscopic variability of brown dwarfs covering the 0.99 μm FeH feature. We observed the spatially resolved very nearby brown dwarf binary WISE J104915.57–531906.1 (Luhman 16AB), a late-L and early-T dwarf, with Hubble Space Telescope/WFC3 in the G102 grism at 0.8–1.15 μm. We find significant variability at all wavelengths for both brown dwarfs, with peak-to-valley amplitudes of 9.3% for Luhman 16B and 4.5% for Luhman 16A. This represents the first unambiguous detection of variability in Luhman 16A. We estimate a rotational period between 4.5 and 5.5 hr, very similar to Luhman 16B. Variability in both components complicates the interpretation of spatially unresolved observations. The probability for finding large amplitude variability in any two brown dwarfs is less than 10%. Our finding may suggest that a common but yet unknown feature of the binary is important for the occurrence of variability. For both objects, the amplitude is nearly constant at all wavelengths except in the deep K i feature below 0.84 μm. No variations are seen across the 0.99 μm FeH feature. The observations lend strong further support to cloud height variations rather than holes in the silicate clouds, but cannot fully rule out holes in the iron clouds. Here, we re-evaluate the diagnostic potential of the FeH feature as a tracer of cloud patchiness.

  5. Cloud structure of the nearest brown dwarfs. II: High-amplitude variability for Luhman 16 A and B in and out of the 0.99 μm FeH feature

    DOE PAGES [OSTI]

    Buenzli, Esther; Marley, Mark S.; Apai, Daniel; Saumon, Didier; Biller, Beth A.; Crossfield, Ian J. M.; Radigan, Jacqueline

    2015-10-20

    The re-emergence of the 0.99 μm FeH feature in brown dwarfs of early- to mid-T spectral type has been suggested as evidence for cloud disruption where flux from deep, hot regions below the Fe cloud deck can emerge. The same mechanism could account for color changes at the L/T transition and photometric variability. We present the first observations of spectroscopic variability of brown dwarfs covering the 0.99 μm FeH feature. We observed the spatially resolved very nearby brown dwarf binary WISE J104915.57–531906.1 (Luhman 16AB), a late-L and early-T dwarf, with Hubble Space Telescope/WFC3 in the G102 grism at 0.8–1.15 μm.more » We find significant variability at all wavelengths for both brown dwarfs, with peak-to-valley amplitudes of 9.3% for Luhman 16B and 4.5% for Luhman 16A. This represents the first unambiguous detection of variability in Luhman 16A. We estimate a rotational period between 4.5 and 5.5 hr, very similar to Luhman 16B. Variability in both components complicates the interpretation of spatially unresolved observations. The probability for finding large amplitude variability in any two brown dwarfs is less than 10%. Our finding may suggest that a common but yet unknown feature of the binary is important for the occurrence of variability. For both objects, the amplitude is nearly constant at all wavelengths except in the deep K i feature below 0.84 μm. No variations are seen across the 0.99 μm FeH feature. The observations lend strong further support to cloud height variations rather than holes in the silicate clouds, but cannot fully rule out holes in the iron clouds. Here, we re-evaluate the diagnostic potential of the FeH feature as a tracer of cloud patchiness.« less

  6. A STUDY OF CARBON FEATURES IN TYPE Ia SUPERNOVA SPECTRA (Journal...

    Office of Scientific and Technical Information (OSTI)

    A STUDY OF CARBON FEATURES IN TYPE Ia SUPERNOVA SPECTRA Citation Details In-Document Search Title: A STUDY OF CARBON FEATURES IN TYPE Ia SUPERNOVA SPECTRA One of the major ...

  7. SU-E-J-237: Image Feature Based DRR and Portal Image Registration...

    Office of Scientific and Technical Information (OSTI)

    SU-E-J-237: Image Feature Based DRR and Portal Image Registration Citation Details In-Document Search Title: SU-E-J-237: Image Feature Based DRR and Portal Image Registration ...

  8. Joint BioEnergy Institute Oxime-NIMS Work Featured on the Cover...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    BioEnergy Institute Oxime-NIMS Work Featured on the Cover of ACS Chemical Biology - Sandia ... Joint BioEnergy Institute Oxime-NIMS Work Featured on the Cover of ACS Chemical Biology ...

  9. Day Three of 2012 ARPA-E Summit Will Feature President Bill Clinton...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Three of 2012 ARPA-E Summit Will Feature President Bill Clinton, ARPA-E Director Majumdar, and America's Top Energy Thought Leaders Day Three of 2012 ARPA-E Summit Will Feature ...

  10. NREL: A Year in Clean Energy Innovations: A Review of NREL's Feature Stories

    SciTech Connect

    Not Available

    2010-01-01

    The publication is a compilation of various feature stories published on NREL's public Web site, nrel.gov, throughout 2009.

  11. Features, Events and Processes for the Used Fuel Disposition Campaign

    SciTech Connect

    Blink, J A; Greenberg, H R; Caporuscio, F A; Houseworth, J E; Freeze, G A; Mariner, P; Cunnane, J C

    2010-12-15

    The Used Fuel Disposition (UFD) Campaign within DOE-NE is evaluating storage and disposal options for a range of waste forms and a range of geologic environments. To assess the potential performance of conceptual repository designs for the combinations of waste form and geologic environment, a master set of Features, Events, and Processes (FEPs) has been developed and evaluated. These FEPs are based on prior lists developed by the Yucca Mountain Project (YMP) and the international repository community. The objective of the UFD FEPs activity is to identify and categorize FEPs that are important to disposal system performance for a variety of disposal alternatives (i.e., combinations of waste forms, disposal concepts, and geologic environments). FEP analysis provides guidance for the identification of (1) important considerations in disposal system design, and (2) gaps in the technical bases. The UFD FEPs also support the development of performance assessment (PA) models to evaluate the long-term performance of waste forms in the engineered and geologic environments of candidate disposal system alternatives. For the UFD FEP development, five waste form groups and seven geologic settings are being considered. A total of 208 FEPs have been identified, categorized by the physical components of the waste disposal system as well as cross-cutting physical phenomena. The combination of 35 waste-form/geologic environments and 208 FEPs is large; however, some FEP evaluations can cut across multiple waste/environment combinations, and other FEPs can be categorized as not-applicable for some waste/environment combinations, making the task of FEP evaluation more tractable. A FEP status tool has been developed to document progress. The tool emphasizes three major areas that can be statused numerically. FEP Applicability documents whether the FEP is pertinent to a waste/environment combination. FEP Completion Status documents the progress of the evaluation for the FEP

  12. Structure of continental rifts: Role of older features and magmatism

    SciTech Connect

    Keller, G.R.

    1996-12-31

    Recent geological and geophysical studies in several continental rifts have begun to shed light on the details of the processes which govern the structural evolution of these important exploration targets. In Kenya and Tanzania, the classic East African rift has been the object of several investigations which reveal that its location follows the boundary (suture ?) between the Tanzanian craton (Archean) and Mozambiquan belt (Proterozoic), The Baikal rift also follows a similar boundary, and the Mid-continent rift of North America appears to do the same. Rifts themselves often act as zones of weakness which are reactivated by younger tectonic regimes. The classic North American example of this effect is the Eocambrian Southern Oklahoma aulacogen which was deformed to create the Anadarko basin and Wichita uplift in the late Paleozoic. The Central basin platform has a similar history although the original rift formed at {approximately}1,100Ma. Integration of geophysical data with petrologic and geochemical data from several rift zones has also provided a new picture of the nature and extent of magmatic modification of the crust. An interesting contradiction is that Phanerozoic rifts, except the Afar region, show little evidence for major magmatic modification of the crust whereas, at least in North America, many Precambrian rifts are associated with very large mafic bodies in the crust. The Kenya rift displays evidence for modification of the lower crust in a two-phase magmatic history, but upper crustal magmatic features are limited to local intrusions associated with volcanoes. In this rift, complex basement structure plays a much more important role than previously realized, and the geophysical signatures of basement structure and magmatism are easy to confuse. If this is also the case in other rifts, additional rift basins remain to be discovered.

  13. Structure of continental rifts: Role of older features and magmatism

    SciTech Connect

    Keller, G.R. )

    1996-01-01

    Recent geological and geophysical studies in several continental rifts have begun to shed light on the details of the processes which govern the structural evolution of these important exploration targets. In Kenya and Tanzania, the classic East African rift has been the object of several investigations which reveal that its location follows the boundary (suture ) between the Tanzanian craton (Archean) and Mozambiquan belt (Proterozoic), The Baikal rift also follows a similar boundary, and the Mid-continent rift of North America appears to do the same. Rifts themselves often act as zones of weakness which are reactivated by younger tectonic regimes. The classic North American example of this effect is the Eocambrian Southern Oklahoma aulacogen which was deformed to create the Anadarko basin and Wichita uplift in the late Paleozoic. The Central basin platform has a similar history although the original rift formed at [approximately]1,100Ma. Integration of geophysical data with petrologic and geochemical data from several rift zones has also provided a new picture of the nature and extent of magmatic modification of the crust. An interesting contradiction is that Phanerozoic rifts, except the Afar region, show little evidence for major magmatic modification of the crust whereas, at least in North America, many Precambrian rifts are associated with very large mafic bodies in the crust. The Kenya rift displays evidence for modification of the lower crust in a two-phase magmatic history, but upper crustal magmatic features are limited to local intrusions associated with volcanoes. In this rift, complex basement structure plays a much more important role than previously realized, and the geophysical signatures of basement structure and magmatism are easy to confuse. If this is also the case in other rifts, additional rift basins remain to be discovered.

  14. Feature Detection, Characterization and Confirmation Methodology: Final Report

    SciTech Connect

    Karasaki, Kenzi; Apps, John; Doughty, Christine; Gwatney, Hope; Onishi, Celia Tiemi; Trautz, Robert; Tsang, Chin-Fu

    2007-03-01

    This is the final report of the NUMO-LBNL collaborative project: Feature Detection, Characterization and Confirmation Methodology under NUMO-DOE/LBNL collaboration agreement, the task description of which can be found in the Appendix. We examine site characterization projects from several sites in the world. The list includes Yucca Mountain in the USA, Tono and Horonobe in Japan, AECL in Canada, sites in Sweden, and Olkiluoto in Finland. We identify important geologic features and parameters common to most (or all) sites to provide useful information for future repository siting activity. At first glance, one could question whether there was any commonality among the sites, which are in different rock types at different locations. For example, the planned Yucca Mountain site is a dry repository in unsaturated tuff, whereas the Swedish sites are situated in saturated granite. However, the study concludes that indeed there are a number of important common features and parameters among all the sites--namely, (1) fault properties, (2) fracture-matrix interaction (3) groundwater flux, (4) boundary conditions, and (5) the permeability and porosity of the materials. We list the lessons learned from the Yucca Mountain Project and other site characterization programs. Most programs have by and large been quite successful. Nonetheless, there are definitely 'should-haves' and 'could-haves', or lessons to be learned, in all these programs. Although each site characterization program has some unique aspects, we believe that these crosscutting lessons can be very useful for future site investigations to be conducted in Japan. One of the most common lessons learned is that a repository program should allow for flexibility, in both schedule and approach. We examine field investigation technologies used to collect site characterization data in the field. An extensive list of existing field technologies is presented, with some discussion on usage and limitations. Many of the

  15. Replication of surface features from a master model to an amorphous metallic article

    DOEpatents

    Johnson, William L.; Bakke, Eric; Peker, Atakan

    1999-01-01

    The surface features of an article are replicated by preparing a master model having a preselected surface feature thereon which is to be replicated, and replicating the preselected surface feature of the master model. The replication is accomplished by providing a piece of a bulk-solidifying amorphous metallic alloy, contacting the piece of the bulk-solidifying amorphous metallic alloy to the surface of the master model at an elevated replication temperature to transfer a negative copy of the preselected surface feature of the master model to the piece, and separating the piece having the negative copy of the preselected surface feature from the master model.

  16. Features, Events, and Processes in UZ Flow and Transport

    SciTech Connect

    J.E. Houseworth

    2001-04-10

    Unsaturated zone (UZ) flow and radionuclide transport is a component of the natural barriers that affects potential repository performance. The total system performance assessment (TSPA) model, and underlying process models, of this natural barrier component capture some, but not all, of the associated features, events, and processes (FEPs) as identified in the FEPs Database (Freeze, et al. 2001 [154365]). This analysis and model report (AMR) discusses all FEPs identified as associated with UZ flow and radionuclide transport. The purpose of this analysis is to give a comprehensive summary of all UZ flow and radionuclide transport FEPs and their treatment in, or exclusion from, TSPA models. The scope of this analysis is to provide a summary of the FEPs associated with the UZ flow and radionuclide transport and to provide a reference roadmap to other documentation where detailed discussions of these FEPs, treated explicitly in TSPA models, are offered. Other FEPs may be screened out from treatment in TSPA by direct regulatory exclusion or through arguments concerning low probability and/or low consequence of the FEPs on potential repository performance. Arguments for exclusion of FEPs are presented in this analysis. Exclusion of specific FEPs from the UZ flow and transport models does not necessarily imply that the FEP is excluded from the TSPA. Similarly, in the treatment of included FEPs, only the way in which the FEPs are included in the UZ flow and transport models is discussed in this document. This report has been prepared in accordance with the technical work plan for the unsaturated zone subproduct element (CRWMS M&O 2000 [153447]). The purpose of this report is to document that all FEPs are either included in UZ flow and transport models for TSPA, or can be excluded from UZ flow and transport models for TSPA on the basis of low probability or low consequence. Arguments for exclusion are presented in this analysis. Exclusion of specific FEPs from UZ flow and

  17. SU-D-BRA-05: Toward Understanding the Robustness of Radiomics Features in CT

    SciTech Connect

    Mackin, D; Zhang, L; Yang, J; Jones, A; Court, L; Fave, X; Fried, D; Taylor, B; Rodriguez-Rivera, E; Dodge, C

    2015-06-15

    Purpose: To gauge the impact of inter-scanner variability on radiomics features in computed tomography (CT). Methods: We compared the radiomics features calculated for 17 scans of the specially designed Credence Cartridge Radiomics (CCR) phantom with those calculated for 20 scans of non–small cell lung cancer (NSCLC) tumors. The scans were acquired at four medical centers using General Electric, Philips, Siemens, and Toshiba CT scanners. Each center used its own routine thoracic imaging protocol. To produce a large dynamic range of radiomics feature values, the CCR phantom has 10 cartridges comprising different materials. The features studied were derived from the neighborhood gray-tone difference matrix or image intensity histogram. To quantify the significance of the inter-scanner variability, we introduced the metric “feature noise”, which compares the ratio of inter-scanner variability and inter-patient variability in decibels, positive values indicating substantial noise. We performed hierarchical clustering based to look for dependence of the features on the scan acquisition parameters. Results: For 5 of the 10 features studied, the inter-scanner variability was larger than the inter-patient variability. Of the 10 materials in the phantom, shredded rubber seemed to produce feature values most similar to those of the NSCLC tumors. The feature busyness had the greatest feature noise (14.3 dB), whereas texture strength had the least (−14.6 dB). Hierarchical clustering indicated that the features depended in part on the scanner manufacturer, image slice thickness, and pixel size. Conclusion: The variability in the values of radiomics features calculated for CT images of a radiomics phantom can be substantial relative to the variability in the values of these features calculated for CT images of NSCLC tumors. These inter-scanner differences and their effects should be carefully considered in future radiomics studies.

  18. Feb. 9 Event at Jefferson Lab Features Chemistry Demonstrations Set to Pop

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Music | Jefferson Lab 9 Event at Jefferson Lab Features Chemistry Demonstrations Set to Pop Music Feb. 9 Event at Jefferson Lab Features Chemistry Demonstrations Set to Pop Music NEWPORT NEWS, Va., Feb. 2, 2010 - Jefferson Lab's Feb. 9 Science Series event will feature members of the Tidewater Alliance of Chemistry Teachers (TACT) presenting 11 elaborate chemical demonstrations that have been choreographed and set to popular music. The program, titled A TACT-ful Chemical Musical, also

  19. Fractured reservoir discrete feature network technologies. Final report, March 7, 1996 to September 30, 1998

    SciTech Connect

    Dershowitz, William S.; Einstein, Herbert H.; LaPoint, Paul R.; Eiben, Thorsten; Wadleigh, Eugene; Ivanova, Violeta

    1998-12-01

    This report summarizes research conducted for the Fractured Reservoir Discrete Feature Network Technologies Project. The five areas studied are development of hierarchical fracture models; fractured reservoir compartmentalization, block size, and tributary volume analysis; development and demonstration of fractured reservoir discrete feature data analysis tools; development of tools for data integration and reservoir simulation through application of discrete feature network technologies for tertiary oil production; quantitative evaluation of the economic value of this analysis approach.

  20. Studies of the jet in BL Lacertae. I. Recollimation shock and moving emission features

    SciTech Connect

    Cohen, M. H.; Hovatta, T.; Meier, D. L.; Arshakian, T. G.; Homan, D. C.; Kovalev, Y. Y.; Pushkarev, A. B.; Savolainen, T.

    2014-06-01

    Parsec-scale VLBA images of BL Lac at 15 GHz show that the jet contains a permanent quasi-stationary emission feature 0.26 mas (0.34 pc projected) from the core, along with numerous moving features. In projection, the tracks of the moving features cluster around an axis at a position angle of 166.6 that connects the core with the standing feature. The moving features appear to emanate from the standing feature in a manner strikingly similar to the results of numerical two-dimensional relativistic magneto-hydrodynamic (RMHD) simulations in which moving shocks are generated at a recollimation shock (RCS). Because of this, and the close analogy to the jet feature HST-1 in M87, we identify the standing feature in BL Lac as an RCS. We assume that the magnetic field dominates the dynamics in the jet, and that the field is predominantly toroidal. From this we suggest that the moving features are compressions established by slow and fast mode magneto-acoustic MHD waves. We illustrate the situation with a simple model in which the slowest moving feature is a slow-mode wave, and the fastest feature is a fast-mode wave. In the model, the beam has Lorentz factor ?{sub beam}{sup gal}?3.5 in the frame of the host galaxy and the fast mode wave has Lorentz factor ?{sub Fwave}{sup beam}?1.6 in the frame of the beam. This gives a maximum apparent speed for the moving features, ?{sub app} = v{sub app}/c = 10. In this model the Lorentz factor of the pattern in the galaxy frame is approximately three times larger than that of the beam itself.

  1. African American Inventors, Nutrition, Much More Featured at Science.gov |

    Office of Scientific and Technical Information (OSTI)

    OSTI, US Dept of Energy Office of Scientific and Technical Information African American Inventors, Nutrition, Much More Featured at Science.gov Back to the OSTI News Listing for 2008 In one query, you can search over 30 databases and more than 1,800 scientific Web sites from 13 federal government agencies at Science.gov. Currently featured sites include African Americans in Science and Technology, Smart Nutrition, Poison Prevention and Animal Cloning. Science.gov's featured sites are rotated

  2. Hurricane Katrina Recovery Information Features at Science.gov | OSTI, US

    Office of Scientific and Technical Information (OSTI)

    Dept of Energy Office of Scientific and Technical Information Recovery Information Features at Science.gov Back to the OSTI News Listing for 2005 The Science.gov Alliance recently tapped its wealth of scientific information across 12 science agencies to provide two special Hurricane Katrina features at Science.gov. A few of the vast information sources included on these features are: WISER - Wireless Information System for Emergency Responders; HSDB - Hazardous Substances Data Bank; TOXMAP -

  3. Science Web sites featured at Science.gov | OSTI, US Dept of Energy Office

    Office of Scientific and Technical Information (OSTI)

    of Scientific and Technical Information Web sites featured at Science.gov Back to the OSTI News Listing for 2008 In one query, you can search over 30 databases and more than 1,800 scientific Web sites from 13 federal government agencies at Science.gov. Currently, featured sites include Fuel Economy, Mosquito Control, and National Earthquake Information Center. Science.gov's featured sites are rotated frequently, but you can access a comprehensive list of previous features by going to the

  4. NREL: A Year in Clean Energy Innovations: A Review of NREL's Feature Stories, 2010

    SciTech Connect

    Not Available

    2011-04-01

    The publication is a compilation of various feature stories published on NREL's public website, nrel.gov, throughout Calendar Year 2010.

  5. Web Feature Nuclear Stewardship: Lessons from a Not-So-Remote...

    Office of Legacy Management (LM)

    Geotimes - March 2002 - Amchitka Island Yage 1 ot 6 Web Feature Nuclear Stewardship: ... or of DOE. In 1971, the United States set off its largest underground nuclear test. ...

  6. NREL: A Year in Clean Energy Innovations, A Review of NREL's 2012 Feature Stories (Book)

    SciTech Connect

    Not Available

    2013-03-01

    The publication is a compilation of various feature stories published on NREL's public website, nrel.gov, throughout Calendar Year 2012.

  7. NREL: A Year in Clean Energy Innovations: A Review of NREL's 2014 Feature Stories (Brochure)

    SciTech Connect

    Not Available

    2015-03-01

    This publication is a compilation of various feature stories published on NREL's public website, nrel.gov, throughout Calendar Year 2014.

  8. NREL: A Year in Clean Energy Innovations, A Review of NREL's 2013 Feature Stories (Book)

    SciTech Connect

    Not Available

    2014-02-01

    The publication is a compilation of various feature stories published on NREL's public website, nrel.gov, throughout Calendar Year 2013.

  9. Safety Evaluation Report: Development of a Novel Efficient Solid-Oxide Hybrid for Co-generation of Hydrogen and Electricity Using Nearby Resources for Local Applications, Materials and Systems Research, Inc. (MSRI), Salt Lake City, UT, February 17, 2009

    SciTech Connect

    Barilo, Nick F.; Frikken, Don; Skolnik, Edward G.; Weiner, Steven C.

    2009-07-16

    Following a telephone interview with Materials and Systems Research, Inc. (MSRI) by members of the Hydrogen Safety Panel on December 4, 2008, a safety review team was dispatched to Salt Lake City, UT to perform a site-visit review. The major topic of concern was the presence of a hydrogen storage and dispensing shed on the MSRI premises close to both its own laboratory/office building and to the adjoining property. The metal shed contains 36 cylinders (two 18-cylinder "pods") of hydrogen all connected to a common manifold and used to supply hydrogen to a U.S. Department of Energy (DOE) fuel cell project plus several other projects using an entire pod as a common supply. In busy times, MSRI uses and replaces one pod per week. As a result of the site visit, the safety review team has raised some concern with the shed’s location, design, use, and safety features as well as other components of the facility, including the laboratory area.

  10. Earth analysis methods, subsurface feature detection methods, earth analysis devices, and articles of manufacture

    DOEpatents

    West, Phillip B.; Novascone, Stephen R.; Wright, Jerry P.

    2012-05-29

    Earth analysis methods, subsurface feature detection methods, earth analysis devices, and articles of manufacture are described. According to one embodiment, an earth analysis method includes engaging a device with the earth, analyzing the earth in a single substantially lineal direction using the device during the engaging, and providing information regarding a subsurface feature of the earth using the analysis.

  11. Earth analysis methods, subsurface feature detection methods, earth analysis devices, and articles of manufacture

    DOEpatents

    West, Phillip B.; Novascone, Stephen R.; Wright, Jerry P.

    2011-09-27

    Earth analysis methods, subsurface feature detection methods, earth analysis devices, and articles of manufacture are described. According to one embodiment, an earth analysis method includes engaging a device with the earth, analyzing the earth in a single substantially lineal direction using the device during the engaging, and providing information regarding a subsurface feature of the earth using the analysis.

  12. OSTI Video Featured | OSTI, US Dept of Energy Office of Scientific and

    Office of Scientific and Technical Information (OSTI)

    Technical Information Video Featured Back to the OSTI News Listing for 2011 An OSTI video is featured at the Energy Blog's Vintage Energy. The Energy Blog says that the DOE R&D Accomplishments: Visions of Success video "does a great job detailing DOE's accomplishments -- and with some energetic music to boot!"

  13. Use of volumetric features for temporal comparison of mass lesions in full field digital mammograms

    SciTech Connect

    Bozek, Jelena Grgic, Mislav; Kallenberg, Michiel; Karssemeijer, Nico

    2014-02-15

    Purpose: Temporal comparison of lesions might improve classification between benign and malignant lesions in full-field digital mammograms (FFDM). The authors compare the use of volumetric features for lesion classification, which are computed from dense tissue thickness maps, to the use of mammographic lesion area. Use of dense tissue thickness maps for lesion characterization is advantageous, since it results in lesion features that are invariant to acquisition parameters. Methods: The dataset used in the analysis consisted of 60 temporal mammogram pairs comprising 120 mediolateral oblique or craniocaudal views with a total of 65 lesions, of which 41 were benign and 24 malignant. The authors analyzed the performance of four volumetric features, area, and four other commonly used features obtained from temporal mammogram pairs, current mammograms, and prior mammograms. The authors evaluated the individual performance of all features and of different feature sets. The authors used linear discriminant analysis with leave-one-out cross validation to classify different feature sets. Results: Volumetric features from temporal mammogram pairs achieved the best individual performance, as measured by the area under the receiver operating characteristic curve (A{sub z} value). Volume change (A{sub z} = 0.88) achieved higher A{sub z} value than projected lesion area change (A{sub z} = 0.78) in the temporal comparison of lesions. Best performance was achieved with a set that consisted of a set of features extracted from the current exam combined with four volumetric features representing changes with respect to the prior mammogram (A{sub z} = 0.90). This was significantly better (p = 0.005) than the performance obtained using features from the current exam only (A{sub z} = 0.77). Conclusions: Volumetric features from temporal mammogram pairs combined with features from the single exam significantly improve discrimination of benign and malignant lesions in FFDM mammograms

  14. Methods for the Precise Locating and Forming of Arrays of Curved Features into a Workpiece

    DOEpatents

    Gill, David Dennis; Keeler, Gordon A.; Serkland, Darwin K.; Mukherjee, Sayan D.

    2008-10-14

    Methods for manufacturing high precision arrays of curved features (e.g. lenses) in the surface of a workpiece are described utilizing orthogonal sets of inter-fitting locating grooves to mate a workpiece to a workpiece holder mounted to the spindle face of a rotating machine tool. The matching inter-fitting groove sets in the workpiece and the chuck allow precisely and non-kinematically indexing the workpiece to locations defined in two orthogonal directions perpendicular to the turning axis of the machine tool. At each location on the workpiece a curved feature can then be on-center machined to create arrays of curved features on the workpiece. The averaging effect of the corresponding sets of inter-fitting grooves provide for precise repeatability in determining, the relative locations of the centers of each of the curved features in an array of curved features.

  15. Significance-weighted feature extraction from hyper-dimensional data and its applications

    SciTech Connect

    Fujimura, S.; Kiyasu, S.

    1996-11-01

    Extracting significant features is essential for processing and transmission of vast volume of hyper-dimensional data. Conventional ways of extracting features are not always satisfactory for this kind of data in terms of optimality and computation time. Here we present a successive feature extraction method designed for significance-weighted supervised classification. After all the data are orthogonalized and reduced by principal component analysis, a set of appropriate features for prescribed purpose is extracted as linear combinations of the reduced components. We applied this method to 411 dimensional hyperspectral data obtained by a ground-based imaging spectrometer. The data were obtained from tree leaves of five categories, soil, stone and concrete. Features were successively extracted, and they were found to yield more than several percents higher accuracy for the classification of prescribed classes than a conventional method. We applied the results of feature extraction for evaluating the performance of current sensors and for designing the spectral bands of new sensors. Bands of new sensors were designed by allocating them to the highly weighted wavelength in extracted features. The designed bands were revealed to be more appropriate for the specific purpose than the current sensors. 8 refs., 11 figs., 3 tabs.

  16. FAINT TIDAL FEATURES IN GALAXIES WITHIN THE CANADA-FRANCE-HAWAII TELESCOPE LEGACY SURVEY WIDE FIELDS

    SciTech Connect

    Atkinson, Adam M.; Abraham, Roberto G.; Ferguson, Annette M. N.

    2013-03-01

    We present an analysis of the detectability of faint tidal features in galaxies from the wide-field component of the Canada-France-Hawaii Telescope Legacy Survey. Our sample consists of 1781 luminous (M{sub r{sup '}}<-19.3 mag) galaxies in the magnitude range 15.5 mag < r' < 17 mag and in the redshift range 0.04 < z < 0.2. Although we have classified tidal features according to their morphology (e.g., streams, shells, and tails), we do not attempt to interpret them in terms of their physical origin (e.g., major versus minor merger debris). Instead, we provide a catalog that is intended to provide raw material for future investigations which will probe the nature of low surface brightness substructure around galaxies. We find that around 12% of the galaxies in our sample show clear tidal features at the highest confidence level. This fraction rises to about 18% if we include systems with convincing, albeit weaker tidal features, and to 26% if we include systems with more marginal features that may or may not be tidal in origin. These proportions are a strong function of rest-frame color and of stellar mass. Linear features, shells, and fans are much more likely to occur in massive galaxies with stellar masses >10{sup 10.5} M {sub Sun }, and red galaxies are twice as likely to show tidal features than are blue galaxies.

  17. Featured Announcements

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    Founded in 1974 at Lawrence Livermore National Laboratory (LLNL) as the Controlled Thermonuclear Research Computer Center, NERSC has evolved from its early days supporting...

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    September 2013 Video Tutorial for Submitting a 2014 ERCAP Request available September 17, ... Then check out the new video tutorial on How to Submit a 2014 ERCAP Request and get the ...

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    NERSC Allocation Year 2012 Ends Monday, January 7 December 19, 2012 by David Turner ... NERSC 2013 awards December 14, 2012 by David Turner The NERSC 2013 awards have been posted

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    May 2011 X-Windows Acceleration via NX May 12, 2011 by Francesca Verdier NX is a computer program that handles remote X-Windows connections. It can greatly improve the speed of...

  1. Featured Announcements

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    Exploration (NISE) 2012 awards have been made February 16, 2012 by Francesca Verdier We received 60 NISE requests this year and have awarded 107.5 million hours to 22 projects. ...

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    the NERSC Initiative for Scientific Exploration (NISE) program. This year we expect to allocate about 100 million hours to a few large projects. Read the full post NERSC 2012 ...

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    November 2013 2014 Call for NERSC Initiative for Scientific Exploration (NISE) Program Due ... is now open for its second round of allocations to projects in data intensive science. ...

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    completed January 8, 2016 by Richard Gerber We're pleased to announce that Edison is once again available to all NERSC users. The move from the NERSC Oakland Scientific Facility...

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    submission system is now open for 2015 requests. All current NERSC projects (including startup, education, Director Reserve, and ALCC projects) must be renewed for 2015 if you wish...

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    Applications for Postdoctoral Fellowship in Computational Science at Berkeley Lab due November 26 October 15, 2012 by Francesca Verdier Researchers in computer science, applied ...

  7. features | JCESR

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    Team Led by Argonne National Lab Selected as DOE's Batteries and Energy Storage Hub On ... to announce that a multi-partner team led by Argonne National Laboratory has been ...

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    March 2015 Intel Led OpenMP Training Session at NERSC This Wednesday March 25 March 24, ... Oakland, CA 94612), NERSC will be hosting an Intel led OpenMP threading training session. ...

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    name, preferred username, and contact information, they will need to select the projectrepositoryexperimentshare that they want to be added to from the provided selection list. ...

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    NERSC compute systems. NIM will then provide a display of the number of login failures that were cleared on each compute system that was affected at the top of the NIM landing page

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    the entire Edison system will be unavailable for about one month beginning June 24. This includes the login nodes and the scratch file system. Please plan your work accordingly. ...

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    register6325131222429932289)

    Mon, August 17 - "Hello world from Intel Xeon Phi coprocessors". Overview of architecture, preview of course...

  13. Featured Articles

    Office of Science (SC)

    Award. 8CC841F4-EA48-4038-BA00-09C81040C015http:1.usa.gov1kagbcv Flowing Toward Red Blood Cell Breakthroughs

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    September 2010 NUG Call Tuesday Sept 2, 2010 10am PST September 2, 2010

  15. Featured Announcements

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    March 2011 Training April 5 - Material Science and Chemistry Applications March 9, 2011 by Francesca Verdier Training on "Using Chemistry and Material Sciences Applications" will be held April 5, presented simultaneously on the web and at NERSC. See Chemistry and Material Sciences Applications. Read the full post Student Summer Internships at NERSC March 9, 2011 by Francesca Verdier NERSC has internship positions in cloud computing, data focused science, and Flash I/O performnace. See

  16. Featured Announcements

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    April 2011 NERSC Online Training May 3: Navigating NERSC File Systems April 26, 2011 by Richard Gerber A NERSC training event, "Navigating NERSC File Systems," will be presented Tuesday, May 3, 2011, from 10:00 -11:00 PDT. This event was postponed from April 26. The event will be presented simultaneously at the NERSC Oakland Scientific Facility and as a webcast. Read the full post NUG teleconference April 14, 2011 April 13, 2011 by Francesca Verdier On the agenda: Hopper time

  17. Featured Announcements

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    June 2011 New 1 Terabyte Memory Node June 17, 2011 by Francesca Verdier A new "extra large" memory node that has four 8-core Nehalem EX processors (32 cores total) and 1TB memory has been deployed in the Carver/Magellan complex. See Memory Considerations on Carver. Read the full post SC11 Education Program Applications due July 31 June 9, 2011 by Francesca Verdier Applications for the Education Program are now being accepted. Submission website: https://submissions.supercomputing.org

  18. Featured Announcements

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    February 2013 NERSC User Day February 13 - Trends, Discovery, and Innovation in HPC February 10, 2013 by Francesca Verdier All members of the Berkeley Lab community, as well as those who have registered for the NERSC Users Group meeting, are welcome to join us for the NERSC User Day this February 13, 2013, in the Building 50 auditorium at Berkeley Lab

  19. Featured Announcements

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    April 2013 2014 INCITE Call for Proposals - Due June 28 April 30, 2013 by Francesca Verdier The 2014 INCITE Call for Proposals is now open. Open to researchers from academia, government labs, and industry, the INCITE Program is the major means by which the scientific community gains access to the Leadership Computing Facilities' resources. INCITE is currently soliciting proposals for research on the 27-petaflops Cray XK7 "Titan" and the 10-petaflops IBM Blue Gene/Q "Mira"

  20. Featured Announcements

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    December 2013 2014 DOE ALCC Proposals Due February 3 December 23, 2013 by Francesca Verdier DOE's 2014 call for its ASCR Leadership Computing Challenge (ALCC) competition is posted: http://science.energy.gov/ascr/facilities/alcc/. There are new guidelines this year: http://science.energy.gov/ascr/facilities/alcc/alcc-application-details/. Proposals for 2014 ALCC are due 11:59 PM EST February 3rd, 2014. Email your completed proposal to ALCC@science.doe.gov. PDF format is preferred but not

  1. Featured Announcements

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    October 2014 Major NERSC Maintenance Tuesday November 11 October 31, 2014 by Francesca Verdier There will be a major NERSC maintenance on Tuesday, November 11, from 08:00 until 18:00 PST. Several systems and services will be unavailable during this time

  2. Featured Announcements

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    November 2014 Soliciting Candidates for NERSC User Group Executive Committee November 12, 2014 by Francesca Verdier The NERSC User Group is soliciting candidates for the upcoming election for NUGEX, the executive committee of the NERSC Users' Group (NUG). NUGEX is the voice of the user community to NERSC and DOE and is consulted on many NERSC policy issues, e.g., batch configurations, disk quotas, services and training offerings. There are 8 openings to represent Fusion Energy Sciences, High

  3. Featured Announcements

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    December 2014 2014 NERSC User Survey December 17, 2014 by Francesca Verdier Please take a few minutes to fill out NERSC's annual user survey. Your feedback is important because it allows us to judge the quality of our services, give DOE information on how we are doing, and point us to areas in which we can improve. The survey is on the web at the URL: https://www.nersc.gov/news-publications/publications-reports/user-surveys/2014/ and covers the allocation year 2014. Read the full post NERSC 2015

  4. Featured Announcements

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    January 2015 NERSC Exascale Science Postdoctoral Fellowships January 26, 2015 Applications are being accepted for up to eight postdoctoral fellowship positions at NERSC. The positions are part of a larger effort to enable new, pathbreaking science with NERSC's next generation manycore Cori supercomputer. Fellows will be working in multidisciplinary teams composed of computer, computational, and domain scientists that will transition codes to the Cori system and produce mission-relevant science

  5. Featured Announcements

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    July 2015 Intel Xeon Phi Webinar Series July 2, 2015 by Richard Gerber Intel, through a third-party trainer, is sponsoring a series of webinars focused on the Xeon Phi. You can register at https://attendee.gotowebinar.com/register/1855310790447082498

  6. Featured Announcements

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    September 2015 AY 2016 ERCAP Renewals Due Sept 21st September 18, 2015 Rememeber to submit your AY 2016 ERCAP renewal requests by 21:59 on Monday Sept. 21st. Read the full post ERCAP Deadline is Sept 21, 2015 September 18, 2015 by Clayton Bagwell Don't forget to submit your 2016 ERCAP renewal request. Read the full post Out of time? Use scavenger queue on Hopper September 18, 2015 by Katie Antypas NERSC is now allowing projects and users who have fewer than 100,000 MPP hours to run in the

  7. Featured Announcements

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    December 2015 Hopper has retired. NERSC is moving! December 16, 2015 by Katie Antypas NERSC's Hopper system has retired and NERSC (people and remaining systems) are moving to our new facility on the hill. We thank all our users for your patience during our move! Regards, Katie Antypas Department Head for Scientific Computing and Data Services

  8. Featured Announcements

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    April 2016 New Webinar Series on Best Practices for HPC Software Developers April 25, 2016 by Rebecca Hartman-Baker A new webinar series aimed at developers of software on HPC systems begins on May 4, 2016. These webinars, which are a collaboration between the IDEAS scientific software productivity project, NERSC, ALCF, and OLCF, will present best practices that will help users of HPC systems carry out their software development more productively. The first webinar, entitled "What All Codes

  9. Featured Announcements

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    May 2016 Cori Phase II Preparations May 9, 2016 by Rebecca Hartman-Baker We expect the first cabinets of Cori Phase II to arrive in CRT/Wang Hall on the LBL campus in July. NERSC personnel will immediately get to work on bringing the machine into production. Before the machine can be released to the NERSC user community, a number of tasks must be completed, some of which will have a direct impact on NERSC users. We've created the Cori Phase II Schedule page to keep users updated on the progress

  10. Featured Announcements

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    June 2016 Important Update on Cori Status June 30, 2016 by Rebecca Hartman-Baker We are grateful for your patience as we upgrade Cori to the latest operating system, a necessary step in enabling support for the upcoming Knights Landing Phase 2 of Cori. At 2:00 pm Pacific time, we will release the machine back to users. Before you log in and begin working on Cori again, here are a few important things you should know. Read the full post Women in HPC at SC16: Call for Posters and Participation

  11. Featured Announcements

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    August 2016 ERCAP Renewals for AY17 Due September 19, 2016 23:59 PDT August 25, 2016 by Rebecca Hartman-Baker ERCAP Renewals for AY17 Due September 19, 2016, 23:59 PDT The deadline for submitting an ERCAP proposal for an allocation for next year is September 19, 2016 at 11:59 PM Pacific Time. Read the full post Xeon Phi Users Group 2016 Meeting August 3, 2016 by Richard Gerber Intel Xeon Phi Users Group 2016 Meeting Call for Presentations Have you been working to port or optimize your code for

  12. Featured Announcements

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    October 2016 A Brief Primer on the SLURM Scheduler October 17, 2016 by Rebecca Hartman-Baker Edison is the only NERSC supercomputer currently available to users, so it is unusually oversubscribed. This has led to long wait times for many users, and a number of questions to NERSC consulting about the poor throughput many users are getting. Users often wonder whether the scheduler is working properly. Read the full post Science Gateways Moving to Berkeley Hardware: Test Your Site! October 7, 2016

  13. Featured Announcements

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    July 2011 Workshop on Cray XE6 User Experiences September 27-28 July 11, 2011 by Francesca Verdier Sandia National Laboratory and Cray Inc are hosting a Workshop on Cray XE6 User...

  14. Featured Announcements

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    January 2012 NERSC User Group Annual Meeting February 1-3, 2012 January 5, 2012 by Francesca Verdier Registration is open for the NERSC Users' Group Meeting and HPC training on...

  15. Featured Announcements

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    March 2012 Franklin to be Retired April 30, 2012 March 6, 2012 by Francesca Verdier Franklin and its external login node Freedom will be retired on April 30, 2012. Batch processing...

  16. Featured Announcements

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    April 2012 Eight Projects Selected for NERSC's Data Intensive Computing Pilot Program April 30, 2012 by Francesca Verdier Eight projects have been selected to participate in...

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    August 2011 Hopper Scaling Incentive Program August 30, 2011 by Francesca Verdier For projects that haven't yet scaled their codes to 683 or more nodes (which is the level at which...

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    August 2012 2013 Allocation Request Submissions Due September 28 August 1, 2012 by Francesca Verdier The deadline for submissions for 2013 NERSC allocation requests is September 28...

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    February 2011 NERSC training events: Data Transfer and Archiving; Chemistry and Material Sciences Applications February 21, 2011 by Richard Gerber NERSC will present two training...

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    January 2013 ASCR Leadership Computing Challenge (ALCC) proposals due February 1, 2013 January 2, 2013 by Francesca Verdier DOE's ASCR Leadership Computing Challenge (ALCC) program...

  1. Featured Announcements

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    March 2013 Track NERSC Outages in Google Calendar March 22, 2013 by Jack Deslippe Outages are now available in Google calendar form. You can subscribe to this calendar by following...

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    November 2012 Phase-1 of NERSC's Cray Edison System Has Arrived November 28, 2012 by Francesca Verdier Phase-1 of the new Edison system, a Cray XC30 (Cascade), arrived at NERSC on...

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    October 2011 Bioinformatics Computing Consultant Position Available October 31, 2011 by Katie Antypas NERSC and the Joint Genome Institute (JGI) are searching for two individuals...

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    January 2011 NERSC seeks Computational Systems Group Lead January 6, 2011 by Katie Antypas Note: This position is now closed. Read the full post NISE Requests Due Feb. 24 January...

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    June 2012 Cray to Install Cascade System at NERSC June 27, 2012 by Richard Gerber Cray will install a next-generation supercomputer code-named "Cascade" and a next-generation Cray...

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    May 2012 NOVA Portal: Submit VASP Jobs to Carver via the Web May 11, 2012 by Francesca Verdier NOVA is an experimental web application that enables users to submit VASP jobs to...

  7. Featured Announcements

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    August 2013 All Users Now Enabled on Edison Phase 2 August 30, 2013 by Francesca Verdier All user accounts have been enabled on the second phase of Edison, a Cray XC30 with 5,200...

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    November 2015 Edison scratch files will be deleted on 11302015 when Edison moves November 15, 2015 by Zhengji Zhao Edison is scheduled to be powered off at 7:00am PST on November...

  9. Featured Announcements

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    August 2015 Parallel Programming and Optimization for Intel Architecture August 14, 2015 by Richard Gerber Intel is sponsoring a series of webinars entitled "Parallel Programming...

  10. Featured Announcements

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    and Challenges. From the 2014 NERSC User's Group Meeting March 20, 2014 by Richard Gerber Modeling the Changing Earth System: Prospects and Challenges, William Collins,...

  11. Featured Announcements

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    aka GSCRATCH) will be retired on October 14 at 12:00 PDT October 9, 2015 by Richard Gerber This is a reminder that the Global Scratch (globalscratch2 aka GSCRATCH) file...

  12. Featured Announcements

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    and Status Mon, Nov 28 westmere queue drain - 08:00 - DONE remove - 10:20 - DONE serial queue add westmere nodes - 10:40 - DONE Tue, Nov 29 magxlmem queue drain - 08:00 -...

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    September 2011 Serial and Westmere Queues on Carver September 20, 2011 by Francesca Verdier NERSC has replaced 80 8-core Intel Nehalem nodes on Carver with 80 12-core Intel...

  14. ALSNews Features

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ... based on entering the DOI. To enter publications or to search the ALS publications database, go ... In terms of user access, there are opportunities and challenges to the ...

  15. Featured Announcements

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    on utilization andor free memory Through the use of modern web technology such as HTML5, advanced javascript libraries and WebGL, NERSC has created rich web applications for...

  16. Featured Announcements

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    October 2013 OpenCL now Available on Dirac GPU Cluster October 30, 2013 by Francesca Verdier As requested by many Dirac users, NERSC is migrating Dirac to a newer Linux version to...

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    Help Staff Blogs Request Repository Mailing List Need Help? Out-of-hours Status and Password help Call operations: 1-800-66-NERSC, option 1 or 510-486-6821 Account Support ...

  18. June 3, 2014 Webinar- Features, Events, and Processes: Practical Considerations for Development and Selection of Scenarios

    Energy.gov [DOE]

    P&RA CoP Webinar - June 3, 2014 - Features, Events, and Processes: Practical Considerations for Development and Selection of Scenarios Geoff Freeze (SNL) and Roger Seitz (SRNL)

  19. AN ENIGMATIC POINT-LIKE FEATURE WITHIN THE HD 169142 TRANSITIONAL DISK ,

    SciTech Connect

    Biller, Beth A.; Males, Jared; Morzinski, Katie; Close, Laird M.; Follette, Katherine B.; Hinz, Philip M.; Rodigas, Timothy; Weinberger, Alycia; Juhász, Attila; Lacour, Sylvestre; Henning, Thomas; Pott, Jörg-Uwe; Köhler, Rainer; Bonnefoy, Mickaël

    2014-09-01

    We report the detection of a faint point-like feature possibly related to ongoing planet-formation in the disk of the transition disk star HD 169142. The point-like feature has a Δmag(L) ∼ 6.4, at a separation of ∼0.''11 and position angle ∼0°. Given its lack of an H or K{sub S} counterpart despite its relative brightness, this candidate cannot be explained by purely photospheric emission and must be a disk feature heated by an as yet unknown source. Its extremely red colors make it highly unlikely to be a background object, but future multi-wavelength follow up is necessary for confirmation and characterization of this feature.

  20. New Low-Energy Building a Landscape Leader, Too - News Feature...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    "We were able to mix really nice landscaping features with the walls and used a lot less energy than if we'd used a ... in this area of the country," Rukavina said. "It will ...

  1. New Feature at OSTI's DOE R& D Accomplishments | OSTI, US Dept of Energy

    Office of Scientific and Technical Information (OSTI)

    Office of Scientific and Technical Information Feature at OSTI's DOE R& D Accomplishments Back to the OSTI News Listing for 2005 Sheldon Glashow, whose work has been instrumental in understanding how our universe came into being, and Steven Weinberg, author of the prize-winning book The First Three Minutes: A Modern View of the Origin of the Universe, are two Noble Laureates featured at OSTI's DOE R &D Accomplishments

  2. Nobel Prize winners Hulse and Wigner featured | OSTI, US Dept of Energy

    Office of Scientific and Technical Information (OSTI)

    Office of Scientific and Technical Information winners Hulse and Wigner featured Back to the OSTI News Listing for 2005 Nobel Prize winners Dr. Russell A. Hulse (1993) and Eugene P. Wigner (1963) are highlighted as part of OSTI's Featured Nobel Physicists, commemorating the World Year of Physics. Hulse won the Nobel Prize for the discovery of the first binary pulsar; Wigner's contributions include his insight into the fundamental mathematics and physics of quantum mechanics, the effort of

  3. OSTI Website Features Non-medical Uses of Computed Tomography (CT) and

    Office of Scientific and Technical Information (OSTI)

    Nuclear Magnetic Resonance (NMR) | OSTI, US Dept of Energy Office of Scientific and Technical Information Website Features Non-medical Uses of Computed Tomography (CT) and Nuclear Magnetic Resonance (NMR) Back to the OSTI News Listing for 2008 From fruit juice screening to coal cleaning processes, Computed Tomography (CT) and Nuclear Magnetic Resonance (NMR) are being put to use for non-medical research. The radiographic inspection methods are currently featured at the DOE R&D

  4. OSTI posts feature of DOE scientists contributing to 2007 Nobel Peace Prize

    Office of Scientific and Technical Information (OSTI)

    about Climate Change | OSTI, US Dept of Energy Office of Scientific and Technical Information posts feature of DOE scientists contributing to 2007 Nobel Peace Prize about Climate Change Back to the OSTI News Listing for 2008 OSTI has posted a Climate Change feature of Department of Energy researchers who contributed to the 2007 Nobel Peace Prize. Information on these researchers, along with DOE technical reports about climate change and links to additional Web pages can be found at DOE

  5. Radiocarbon, Carbon Dating and Willard Libby featured at DOE R&D

    Office of Scientific and Technical Information (OSTI)

    Accomplishments Website | OSTI, US Dept of Energy Office of Scientific and Technical Information Radiocarbon, Carbon Dating and Willard Libby featured at DOE R&D Accomplishments Website Back to the OSTI News Listing for 2010 Willard Libby won the 1960 Nobel Prize in Chemistry for his development of a method to use carbon-14 for age determination in archaeology, geology, geophysics, and other branches of science. View the feature at DOE R&D Accomplishments, a central forum for

  6. Science.gov, Now with Multimedia, New Search Features, Spanish Translations

    Office of Scientific and Technical Information (OSTI)

    Spanish Version Debuted | OSTI, US Dept of Energy Office of Scientific and Technical Information October 9, 2012 Science.gov, Now with Multimedia, New Search Features, Spanish Translations Spanish Version Debuted Oak Ridge, TN - Science.gov, the gateway to U.S. federal science hosted by the Office of Scientific and Technical Information (OSTI), now includes multimedia content and additional features, including an updated interface with enhanced navigation, to help users find the science

  7. Seaborg award winner's documents featured | OSTI, US Dept of Energy Office

    Office of Scientific and Technical Information (OSTI)

    of Scientific and Technical Information Seaborg award winner's documents featured Back to the OSTI News Listing for 2007 Saed Mirzadeh, whose work at Oak Ridge National Laboratory has led to development of new treatments for cancer and other diseases, is the recipient of the American Nuclear Society's 2007 Seaborg Medal Award. A selection of Dr. Mirzadeh's documents are featured at OSTI's Information Bridge. Information Bridge provides free access to full-text documents and citations of the

  8. ARPA-E's Seventh Annual Energy Innovation Summit to Feature America's

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Cutting-Edge Technologies and Convene Top Energy Innovators | Department of Energy E's Seventh Annual Energy Innovation Summit to Feature America's Cutting-Edge Technologies and Convene Top Energy Innovators ARPA-E's Seventh Annual Energy Innovation Summit to Feature America's Cutting-Edge Technologies and Convene Top Energy Innovators February 1, 2016 - 2:25pm Addthis News Media Contact 202-586-4940 DOENews@hq.doe.gov WASHINGTON - The Department of Energy's Advanced Research Projects

  9. Computer-aided breast MR image feature analysis for prediction of tumor response to chemotherapy

    SciTech Connect

    Aghaei, Faranak; Tan, Maxine; Liu, Hong; Zheng, Bin; Hollingsworth, Alan B.; Qian, Wei

    2015-11-15

    Purpose: To identify a new clinical marker based on quantitative kinetic image features analysis and assess its feasibility to predict tumor response to neoadjuvant chemotherapy. Methods: The authors assembled a dataset involving breast MR images acquired from 68 cancer patients before undergoing neoadjuvant chemotherapy. Among them, 25 patients had complete response (CR) and 43 had partial and nonresponse (NR) to chemotherapy based on the response evaluation criteria in solid tumors. The authors developed a computer-aided detection scheme to segment breast areas and tumors depicted on the breast MR images and computed a total of 39 kinetic image features from both tumor and background parenchymal enhancement regions. The authors then applied and tested two approaches to classify between CR and NR cases. The first one analyzed each individual feature and applied a simple feature fusion method that combines classification results from multiple features. The second approach tested an attribute selected classifier that integrates an artificial neural network (ANN) with a wrapper subset evaluator, which was optimized using a leave-one-case-out validation method. Results: In the pool of 39 features, 10 yielded relatively higher classification performance with the areas under receiver operating characteristic curves (AUCs) ranging from 0.61 to 0.78 to classify between CR and NR cases. Using a feature fusion method, the maximum AUC = 0.85 ± 0.05. Using the ANN-based classifier, AUC value significantly increased to 0.96 ± 0.03 (p < 0.01). Conclusions: This study demonstrated that quantitative analysis of kinetic image features computed from breast MR images acquired prechemotherapy has potential to generate a useful clinical marker in predicting tumor response to chemotherapy.

  10. Leveraging the General Services Administration's SmartPay2 Program and its Single Use Account Feature

    Energy.gov [DOE]

    This Flash is issued to clarify the Single Use Account feature discussed in the Memorandum, Leveraging the General Services Administration's SmartPay2 Program and its Single Use Account Feature, dated February 6, 2013, should be leveraged by all current and future GSA SmartPay2 Program contractors, where it makes sense. Single Use Accounts are not designed for Federal procurement offices to use for payments, and therefore, do not apply to Federal employees.

  11. Arizona State featured at OSTI | OSTI, US Dept of Energy Office of

    Office of Scientific and Technical Information (OSTI)

    Scientific and Technical Information Arizona State featured at OSTI Back to the OSTI News Listing for 2010 ASU researchers are looking to solve society's grand challenges, and the institution's research awards grew to over $347 million in 2010. You can now read about ASU research opportunities -- -from undergraduate research to the Complex Adaptive Systems Initiative -- at the OSTI .EDUconnections website. .EDUconnections features U.S. institutions committed to supporting and advancing DOE

  12. DOE Technology Transfer Website Features New Tool to Search Tech Transfer

    Office of Scientific and Technical Information (OSTI)

    Information from DOE National Laboratories | OSTI, US Dept of Energy Office of Scientific and Technical Information December 3, 2012 DOE Technology Transfer Website Features New Tool to Search Tech Transfer Information from DOE National Laboratories The Department of Energy (DOE) Technology Transfer website has a new search feature that for the first time allows searching of technology transfer information across the DOE national laboratories. The new tool enables users to search all of

  13. How do plants capture energy? OSTI features the work of Nobel Laureate

    Office of Scientific and Technical Information (OSTI)

    Melvin Calvin | OSTI, US Dept of Energy Office of Scientific and Technical Information How do plants capture energy? OSTI features the work of Nobel Laureate Melvin Calvin Back to the OSTI News Listing for 2010 Following carbon's path through photosynthesis earned Melvin Calvin the 1961 Nobel Prize in Chemistry and ignited DOE research into using solar energy as a renewable resource. Calvin's work is featured at the DOE R&D Accomplishments website. Find Resources with Additional

  14. Probing the terrestrial regions of planetary systems: warm debris disks with emission features

    SciTech Connect

    Ballering, Nicholas P.; Rieke, George H.; Gáspár, András

    2014-09-20

    Observations of debris disks allow for the study of planetary systems, even where planets have not been detected. However, debris disks are often only characterized by unresolved infrared excesses that resemble featureless blackbodies, and the location of the emitting dust is uncertain due to a degeneracy with the dust grain properties. Here, we characterize the Spitzer Infrared Spectrograph spectra of 22 debris disks exhibiting 10 μm silicate emission features. Such features arise from small warm dust grains, and their presence can significantly constrain the orbital location of the emitting debris. We find that these features can be explained by the presence of an additional dust component in the terrestrial zones of the planetary systems, i.e., an exozodiacal belt. Aside from possessing exozodiacal dust, these debris disks are not particularly unique; their minimum grain sizes are consistent with the blowout sizes of their systems, and their brightnesses are comparable to those of featureless warm debris disks. These disks are in systems of a range of ages, though the older systems with features are found only around A-type stars. The features in young systems may be signatures of terrestrial planet formation. Analyzing the spectra of unresolved debris disks with emission features may be one of the simplest and most accessible ways to study the terrestrial regions of planetary systems.

  15. FALDO: a semantic standard for describing the location of nucleotide and protein feature annotation

    DOE PAGES [OSTI]

    Bolleman, Jerven T.; Mungall, Christopher J.; Strozzi, Francesco; Baran, Joachim; Dumontier, Michel; Bonnal, Raoul J. P.; Buels, Robert; Hoehndorf, Robert; Fujisawa, Takatomo; Katayama, Toshiaki; et al

    2016-06-13

    Nucleotide and protein sequence feature annotations are essential to understand biology on the genomic, transcriptomic, and proteomic level. Using Semantic Web technologies to query biological annotations, there was no standard that described this potentially complex location information as subject-predicate-object triples. In this paper, we have developed an ontology, the Feature Annotation Location Description Ontology (FALDO), to describe the positions of annotated features on linear and circular sequences. FALDO can be used to describe nucleotide features in sequence records, protein annotations, and glycan binding sites, among other features in coordinate systems of the aforementioned “omics” areas. Using the same data formatmore » to represent sequence positions that are independent of file formats allows us to integrate sequence data from multiple sources and data types. The genome browser JBrowse is used to demonstrate accessing multiple SPARQL endpoints to display genomic feature annotations, as well as protein annotations from UniProt mapped to genomic locations. Our ontology allows users to uniformly describe – and potentially merge – sequence annotations from multiple sources. Finally, data sources using FALDO can prospectively be retrieved using federalised SPARQL queries against public SPARQL endpoints and/or local private triple stores.« less

  16. FALDO: A semantic standard for describing the location of nucleotide and protein feature annotation

    DOE PAGES [OSTI]

    Bolleman, Jerven T.; Mungall, Christopher J.; Strozzi, Francesco; Baran, Joachim; Dumontier, Michel; Bonnal, Raoul J. P.; Buels, Robert; Hoehndorf, Robert; Fujisawa, Takatomo; Katayama, Toshiaki; et al

    2016-06-13

    In this study, nucleotide and protein sequence feature annotations are essential to understand biology on the genomic, transcriptomic, and proteomic level. Using Semantic Web technologies to query biological annotations, there was no standard that described this potentially complex location information as subject-predicate-object triples. Here, we have developed an ontology, the Feature Annotation Location Description Ontology (FALDO), to describe the positions of annotated features on linear and circular sequences. FALDO can be used to describe nucleotide features in sequence records, protein annotations, and glycan binding sites, among other features in coordinate systems of the aforementioned “omics” areas. Using the same datamore » format to represent sequence positions that are independent of file formats allows us to integrate sequence data from multiple sources and data types. The genome browser JBrowse is used to demonstrate accessing multiple SPARQL endpoints to display genomic feature annotations, as well as protein annotations from UniProt mapped to genomic locations. In conclusion, our ontology allows users to uniformly describe – and potentially merge – sequence annotations from multiple sources. Data sources using FALDO can prospectively be retrieved using federalised SPARQL queries against public SPARQL endpoints and/or local private triple stores.« less

  17. Electronic nose with a new feature reduction method and a multi-linear classifier for Chinese liquor classification

    SciTech Connect

    Jing, Yaqi; Meng, Qinghao Qi, Peifeng; Zeng, Ming; Li, Wei; Ma, Shugen

    2014-05-15

    An electronic nose (e-nose) was designed to classify Chinese liquors of the same aroma style. A new method of feature reduction which combined feature selection with feature extraction was proposed. Feature selection method used 8 feature-selection algorithms based on information theory and reduced the dimension of the feature space to 41. Kernel entropy component analysis was introduced into the e-nose system as a feature extraction method and the dimension of feature space was reduced to 12. Classification of Chinese liquors was performed by using back propagation artificial neural network (BP-ANN), linear discrimination analysis (LDA), and a multi-linear classifier. The classification rate of the multi-linear classifier was 97.22%, which was higher than LDA and BP-ANN. Finally the classification of Chinese liquors according to their raw materials and geographical origins was performed using the proposed multi-linear classifier and classification rate was 98.75% and 100%, respectively.

  18. AP1000{sup R} severe accident features and post-Fukushima considerations

    SciTech Connect

    Scobel, J. H.; Schulz, T. L.; Williams, M. G.

    2012-07-01

    The AP1000{sup R} passive nuclear power plant is uniquely equipped to withstand an extended station blackout scenario such as the events following the earthquake and tsunami at Fukushima without compromising core and containment integrity. The AP1000 plant shuts down the reactor, cools the core, containment and spent fuel pool for more than 3 days using passive systems that do not require AC or DC power or operator actions. Following this passive coping period, minimal operator actions are needed to extend the operation of the passive features to 7 days using installed equipment. To provide defense-in-depth for design extension conditions, the AP1000 plant has engineered features that mitigate the effects of core damage. Engineered features retain damaged core debris within the reactor vessel as a key feature. Other aspects of the design protect containment integrity during severe accidents, including unique features of the AP1000 design relative to passive containment cooling with water and air, and hydrogen management. (authors)

  19. Automated retrieval of cloud and aerosol properties from the ARM Raman lidar, part 1: feature detection

    SciTech Connect

    Thorsen, Tyler J.; Fu, Qiang; Newsom, Rob K.; Turner, David D.; Comstock, Jennifer M.

    2015-11-01

    A Feature detection and EXtinction retrieval (FEX) algorithm for the Atmospheric Radiation Measurement (ARM) program’s Raman lidar (RL) has been developed. Presented here is part 1 of the FEX algorithm: the detection of features including both clouds and aerosols. The approach of FEX is to use multiple quantities— scattering ratios derived using elastic and nitro-gen channel signals from two fields of view, the scattering ratio derived using only the elastic channel, and the total volume depolarization ratio— to identify features using range-dependent detection thresholds. FEX is designed to be context-sensitive with thresholds determined for each profile by calculating the expected clear-sky signal and noise. The use of multiple quantities pro-vides complementary depictions of cloud and aerosol locations and allows for consistency checks to improve the accuracy of the feature mask. The depolarization ratio is shown to be particularly effective at detecting optically-thin features containing non-spherical particles such as cirrus clouds. Improve-ments over the existing ARM RL cloud mask are shown. The performance of FEX is validated against a collocated micropulse lidar and observations from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite over the ARM Darwin, Australia site. While we focus on a specific lidar system, the FEX framework presented here is suitable for other Raman or high spectral resolution lidars.

  20. Profile evolution of Cr masked features undergoing HBr-inductivelycoupled plasma etching for use in 25 nm silicon nanoimprinttemplates

    SciTech Connect

    Olynick, Deirdre L.; Liddle, J. Alexander; Rangelow, Ivo W.

    2005-09-16

    In nanoimprint template fabrication, the profile of thetemplate features plays a significant role in the profile,release-60084

  1. Polarization dependent asymmetric magneto-resistance features in nanocrystalline diamond films

    SciTech Connect

    Bhattacharyya, Somnath

    2014-08-18

    Polar angle-dependence of magneto-resistance (AMR) in heavily nitrogen-incorporated ultra-nanocrystalline diamond (UNCD) films is recorded by applying high magnetic fields, which shows strong anisotropic features at low temperatures. The temperature-dependence of MR and AMR can reveal transport in the weak-localization regime, which is explained by using a superlattice model for arbitrary values of disorder and angles. While a propagative Fermi surface model explains the negative MR features for low degree of disorder the azimuthal angle-dependent MR shows field dependent anisotropy due to the aligned conducting channels on the layers normal to film growth direction. The analysis of MR and AMR can extract the temperature dependence of dephasing time with respect to the elastic scattering time which not only establishes quasi-two dimensional features in this system but also suggests a potential application in monitoring the performance of UNCD based quantum devices.

  2. Image feature based GPS trace filtering for road network generation and road segmentation

    DOE PAGES [OSTI]

    Yuan, Jiangye; Cheriyadat, Anil M.

    2015-10-19

    We propose a new method to infer road networks from GPS trace data and accurately segment road regions in high-resolution aerial images. Unlike previous efforts that rely on GPS traces alone, we exploit image features to infer road networks from noisy trace data. The inferred road network is used to guide road segmentation. We show that the number of image segments spanned by the traces and the trace orientation validated with image features are important attributes for identifying GPS traces on road regions. Based on filtered traces , we construct road networks and integrate them with image features to segmentmore » road regions. Lastly, our experiments show that the proposed method produces more accurate road networks than the leading method that uses GPS traces alone, and also achieves high accuracy in segmenting road regions even with very noisy GPS data.« less

  3. Image feature based GPS trace filtering for road network generation and road segmentation

    SciTech Connect

    Yuan, Jiangye; Cheriyadat, Anil M.

    2015-10-19

    We propose a new method to infer road networks from GPS trace data and accurately segment road regions in high-resolution aerial images. Unlike previous efforts that rely on GPS traces alone, we exploit image features to infer road networks from noisy trace data. The inferred road network is used to guide road segmentation. We show that the number of image segments spanned by the traces and the trace orientation validated with image features are important attributes for identifying GPS traces on road regions. Based on filtered traces , we construct road networks and integrate them with image features to segment road regions. Lastly, our experiments show that the proposed method produces more accurate road networks than the leading method that uses GPS traces alone, and also achieves high accuracy in segmenting road regions even with very noisy GPS data.

  4. Efficient Feature-Driven Visualization of Large-Scale Scientific Data

    SciTech Connect

    Lu, Aidong

    2012-12-12

    Very large, complex scientific data acquired in many research areas creates critical challenges for scientists to understand, analyze, and organize their data. The objective of this project is to expand the feature extraction and analysis capabilities to develop powerful and accurate visualization tools that can assist domain scientists with their requirements in multiple phases of scientific discovery. We have recently developed several feature-driven visualization methods for extracting different data characteristics of volumetric datasets. Our results verify the hypothesis in the proposal and will be used to develop additional prototype systems.

  5. B I OENV I RONMENTAL FEATURES OF THE OGOTORUK CREEK AREA, CAPE THOMPSON, ALASKA

    Office of Legacy Management (LM)

    B I OENV I RONMENTAL FEATURES OF THE OGOTORUK CREEK AREA, CAPE THOMPSON, ALASKA A First Summary by The Committee on Environmental Studies for Project Chariot . . December 1960 r Division of Biology and Medicine, AEC Washington, D. C. IT U S WEGWS LIBIA3"b This page intentionally left blank NUCLEAR EXPLOSIONS -PEACE UL APPLICATIONS . . BIOLOGY AND MEDICINE BIOENVIRONMENTAL FEATURES OF THE OGOTORUK CREEK AREA . . CAPE THOMPSON, ALASKA A F i r s t Sumnary The C o d t t e e on E n v i r o n m e

  6. Special Feature: National Security & Public Safety at the National Labs |

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Department of Energy Special Feature: National Security & Public Safety at the National Labs Special Feature: National Security & Public Safety at the National Labs December 4, 2013 - 4:10pm Addthis In the photo above, a robot investigates a bomb threat at an arcade during the 2013 Robot Rodeo at Sandia Labs. The operators are not allowed to turn on the lights or turn off the machines, complicating the operation. | Photo by Randy Montoya, Sandia National Laboratories. In the photo

  7. Melvin Schwartz and the discovery of the muon neutrino featured at OSTI |

    Office of Scientific and Technical Information (OSTI)

    OSTI, US Dept of Energy Office of Scientific and Technical Information Melvin Schwartz and the discovery of the muon neutrino featured at OSTI Back to the OSTI News Listing for 2010 Discoveries that unleashed new opportunities for research into the innermost structure and dynamics of matter are now featured at the OSTI DOE R&D Accomplishments website. Melvin Schwartz was the co-winner of the 1988 Nobel Prize in Physics "for the neutrino beam method and the demonstration of the

  8. New Features at OSTI's DOE R and D Accomplishments | OSTI, US Dept of

    Office of Scientific and Technical Information (OSTI)

    Energy Office of Scientific and Technical Information Features at OSTI's DOE R and D Accomplishments Back to the OSTI News Listing for 2005 Two Noble Laureate features have been added to OSTI's DOE R&D Accomplishments Web site: William A. Fowler shared the 1983 Nobel Prize in physics for his research into the creation of chemical elements inside stars, and Martin L. Perl, a professor at the Stanford Linear Accelerator Center (SLAC), awarded the 1995 Nobel Prize in physics for his 1975

  9. OSTI features Nobel Prize winner Leon Lederman | OSTI, US Dept of Energy

    Office of Scientific and Technical Information (OSTI)

    Office of Scientific and Technical Information features Nobel Prize winner Leon Lederman Back to the OSTI News Listing for 2006 Read about this second son of Russian-Jewish parents who, along with his research partners, won the 1988 Nobel Prize in physics for "transforming the ghostly neutrino into an active tool of research." The OSTI-developed and -managed Web site, DOE R&D Accomplishments, has posted a feature highlighting Leon Lederman, who proposed the idea that eventually

  10. Revolutionary physicist and Nobel Prize winner featured at OSTI | OSTI, US

    Office of Scientific and Technical Information (OSTI)

    Dept of Energy Office of Scientific and Technical Information Revolutionary physicist and Nobel Prize winner featured at OSTI Back to the OSTI News Listing for 2010 Kenneth Wilson won the1982 Nobel Prize in physics "for his theory for critical phenomena in connection with phase transitions." Wilson is featured at the OSTI DOE R&D Accomplishments website. DOE R&D Accomplishments is a central forum for information about significant outcomes of past DOE R&D widely

  11. ARPA-E Announces 2012 Energy Innovation Summit Featuring Bill Gates, Fred

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Smith and Lee Scott | Department of Energy 2012 Energy Innovation Summit Featuring Bill Gates, Fred Smith and Lee Scott ARPA-E Announces 2012 Energy Innovation Summit Featuring Bill Gates, Fred Smith and Lee Scott September 9, 2011 - 9:25am Addthis New York, NY - The U.S. Department of Energy's Advanced Research Projects Agency - Energy (ARPA-E) Director, Arun Majumdar, announced yesterday that the Agency will hold its third annual ARPA-E Energy Innovation Summit from February 27 - 29, 2012

  12. Automated Feature Generation in Large-Scale Geospatial Libraries for Content-Based Indexing.

    SciTech Connect

    Tobin Jr, Kenneth William; Bhaduri, Budhendra L; Bright, Eddie A; Cheriydat, Anil; Karnowski, Thomas Paul; Palathingal, Paul J; Potok, Thomas E; Price, Jeffery R

    2006-05-01

    We describe a method for indexing and retrieving high-resolution image regions in large geospatial data libraries. An automated feature extraction method is used that generates a unique and specific structural description of each segment of a tessellated input image file. These tessellated regions are then merged into similar groups, or sub-regions, and indexed to provide flexible and varied retrieval in a query-by-example environment. The methods of tessellation, feature extraction, sub-region clustering, indexing, and retrieval are described and demonstrated using a geospatial library representing a 153 km2 region of land in East Tennessee at 0.5 m per pixel resolution.

  13. Hydrologic characterization of faults and other potentially conductive geologic features in the unsaturated zone

    SciTech Connect

    Javandel, I.; Shan, C.

    1990-01-01

    The capability of characterizing near-vertical faults and other potentially highly conductive geologic features in the vicinity of a high-level-waste repository is of great importance in site characterization of underground waste-isolation projects. The possibility of using transient air pressure data at depth for characterizing these features in the unsaturated zone are investigated. Analytical solutions for calculating the pressure response of such systems are presented. Solutions are given for two types of barometric pressure fluctuations, step function and sinusoidal. 3 refs., 9 figs.

  14. 100th Celebration for DOE R&D Accomplishments Feature Pages | OSTI, US Dept

    Office of Scientific and Technical Information (OSTI)

    of Energy Office of Scientific and Technical Information 0th Celebration for DOE R&D Accomplishments Feature Pages Back to the OSTI News Listing for 2013 DOE R&D Accomplishments is a unique website and database in the OSTI collection. For over 14 years, special Feature pages have been methodically researched and useful information collected on scientists, discoveries, and historical events to include in this searchable resource. It is a rich source of DOE trivia unto itself. The

  15. DNA given a "voice"; award-winning research featured at OSTI | OSTI, US

    Office of Scientific and Technical Information (OSTI)

    Dept of Energy Office of Scientific and Technical Information DNA given a "voice"; award-winning research featured at OSTI Back to the OSTI News Listing for 2007 Nobel Laureate research that helps read the instructions of life is now featured at OSTI. Roger D. Kornberg of Stanford University won the 2006 Nobel Prize in Chemistry for his studies in transcribing DNA, the storehouse of molecular information. Dr. Kornberg noted in a PBS interview, "...the DNA by itself contains

  16. Enrico Fermi winner John B. Goodenough featured at OSTI | OSTI, US Dept of

    Office of Scientific and Technical Information (OSTI)

    Energy Office of Scientific and Technical Information John B. Goodenough featured at OSTI Back to the OSTI News Listing for 2009 For his "lasting contributions to materials science and technology, especially the science underlying lithium-ion batteries," John B. Goodenough was named a winner of the 2009 Enrico Fermi Award, one of the most prestigious science and technology awards awarded by the U.S. Government. View the feature on Goodenough at the DOE R&D Accomplishments

  17. What's playing now at ScienceCinema? See the latest feature. | OSTI, US

    Office of Scientific and Technical Information (OSTI)

    Dept of Energy Office of Scientific and Technical Information What's playing now at ScienceCinema? See the latest feature. Back to the OSTI News Listing for 2012 Currently playing at ScienceCinema: the U.S. ITER Project Moving Forward. See the latest featured video, rotated every few weeks, viewed directly from the ScienceCinema homepage. Then search the database for related videos. ScienceCinema was developed by OSTI and provides precise and time-saving search of the spoken words of video

  18. Industry Feature Archives | U.S. DOE Office of Science (SC)

    Office of Science (SC)

    Industry Feature Archives Advanced Scientific Computing Research (ASCR) ASCR Home About Research Facilities User Facilities Accessing ASCR Facilities Innovative & Novel Computational Impact on Theory & Experiement (INCITE) ASCR Leadership Computing Challenge (ALCC) Industrial Users Computational Science Graduate Fellowship (CSGF) Research & Evaluation Prototypes (REP) Science Highlights Benefits of ASCR Funding Opportunities Advanced Scientific Computing Advisory Committee (ASCAC)

  19. Method for photolithographic definition of recessed features on a semiconductor wafer utilizing auto-focusing alignment

    DOEpatents

    Farino, A.J.; Montague, S.; Sniegowski, J.J.; Smith, J.H.; McWhorter, P.J.

    1998-07-21

    A method is disclosed for photolithographically defining device features up to the resolution limit of an auto-focusing projection stepper when the device features are to be formed in a wafer cavity at a depth exceeding the depth of focus of the stepper. The method uses a focusing cavity located in a die field at the position of a focusing light beam from the auto-focusing projection stepper, with the focusing cavity being of the same depth as one or more adjacent cavities wherein a semiconductor device is to be formed. The focusing cavity provides a bottom surface for referencing the focusing light beam and focusing the stepper at a predetermined depth below the surface of the wafer, whereat the device features are to be defined. As material layers are deposited in each device cavity to build up a semiconductor structure such as a microelectromechanical system (MEMS) device, the same material layers are deposited in the focusing cavity, raising the bottom surface and re-focusing the stepper for accurately defining additional device features in each succeeding material layer. The method is especially applicable for forming MEMS devices within a cavity or trench and integrating the MEMS devices with electronic circuitry fabricated on the wafer surface. 15 figs.

  20. Feature-based Analysis of Plasma-based Particle Acceleration Data

    SciTech Connect

    Ruebel, Oliver; Geddes, Cameron G.R.; Chen, Min; Cormier-Michel, Estelle; Bethel, E. Wes

    2013-07-05

    Plasma-based particle accelerators can produce and sustain thousands of times stronger acceleration fields than conventional particle accelerators, providing a potential solution to the problem of the growing size and cost of conventional particle accelerators. To facilitate scientific knowledge discovery from the ever growing collections of accelerator simulation data generated by accelerator physicists to investigate next-generation plasma-based particle accelerator designs, we describe a novel approach for automatic detection and classification of particle beams and beam substructures due to temporal differences in the acceleration process, here called acceleration features. The automatic feature detection in combination with a novel visualization tool for fast, intuitive, query-based exploration of acceleration features enables an effective top-down data exploration process, starting from a high-level, feature-based view down to the level of individual particles. We describe the application of our analysis in practice to analyze simulations of single pulse and dual and triple colliding pulse accelerator designs, and to study the formation and evolution of particle beams, to compare substructures of a beam and to investigate transverse particle loss.