Sample records for fir hemlock alder

  1. Hemlock Semiconductor Corp HSC | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector GeneralDepartmentAUDIT REPORTOpen EnergyBoard"Starting a new page Jump to:TemplatespageHemlock

  2. E-Print Network 3.0 - arizona alder trees Sample Search Results

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

    shrub stand dominated by Alnus tenuifolia (thinleaf alder). The fast-growing deciduous tree Populus... , and growth dynamics of Alnus tenuifolia (thinleaf alder) and...

  3. 69. Red Butte-Red Fir Ridge (Shasta Red Fir) (Imper 1988b, Cheng 1996d)

    E-Print Network [OSTI]

    Standiford, Richard B.

    69. Red Butte-Red Fir Ridge (Shasta Red Fir) (Imper 1988b, Cheng 1996d) Location This established (fig. 139). Ecological subsection ­ High Cascades (M261Df). Target Element Red Fir (Abies magnifica) Distinctive Features Shasta Red Fir Forest: Taxonomically, the description of Shasta red fir (Abies magnifica

  4. Covalently crosslinked diels-alder polymer networks.

    SciTech Connect (OSTI)

    Bowman, Christopher (University of Colorado, Boulder, CO); Adzima, Brian J. (University of Colorado, Boulder, CO); Anderson, Benjamin John

    2011-09-01T23:59:59.000Z

    This project examines the utility of cycloaddition reactions for the synthesis of polymer networks. Cycloaddition reactions are desirable because they produce no unwanted side reactions or small molecules, allowing for the formation of high molecular weight species and glassy crosslinked networks. Both the Diels-Alder reaction and the copper-catalyzed azide-alkyne cycloaddition (CuAAC) were studied. Accomplishments include externally triggered healing of a thermoreversible covalent network via self-limited hysteresis heating, the creation of Diels-Alder based photoresists, and the successful photochemical catalysis of CuAAC as an alternative to the use of ascorbic acid for the generation of Cu(I) in click reactions. An analysis of the results reveals that these new methods offer the promise of efficiently creating robust, high molecular weight species and delicate three dimensional structures that incorporate chemical functionality in the patterned material. This work was performed under a Strategic Partnerships LDRD during FY10 and FY11 as part of a Sandia National Laboratories/University of Colorado-Boulder Excellence in Science and Engineering Fellowship awarded to Brian J. Adzima, a graduate student at UC-Boulder. Benjamin J. Anderson (Org. 1833) was the Sandia National Laboratories point-of-contact for this fellowship.

  5. Effects of Alder Mine on the Water, Sediments, and Benthic Macroinvertebrates of Alder Creek, 1998 Annual Report.

    SciTech Connect (OSTI)

    Peplow, Dan

    1999-05-28T23:59:59.000Z

    The Alder Mine, an abandoned gold, silver, copper, and zinc mine in Okanogan County, Washington, produces heavy metal-laden effluent that affects the quality of water in a tributary of the Methow River. The annual mass loading of heavy metals from two audits at the Alder Mine was estimated to exceed 11,000 kg per year. In this study, water samples from stations along Alder Creek were assayed for heavy metals by ICP-AES and were found to exceed Washington State's acute freshwater criteria for cadmium (Cd), copper (Cu), selenium (Se), and zinc (Zn).

  6. E-Print Network 3.0 - alder tree labiate Sample Search Results

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

    Fertilization on the Early Growth of Red Alder... Plantations By Kevin R. Brown, Ph.D., R.P. Bio. and Paul J. Courtin, M.F., R.P.F. KEYWORDS: red alder... .R and P.J....

  7. GENERAL TECHNICAL REPORT PSW-GTR-240 Insertion Site Selection and Feeding of the Hemlock

    E-Print Network [OSTI]

    Standiford, Richard B.

    entirely and exclusively susceptible to HWA. However, in the wake of widespread mortality, anecdotal. Dispersal occurs either by crawling to nearby branches, wind, phoresy on macro-vertebrates (e.g., birds determine feeding sites on hemlocks. The distal segment of the HWA labium possesses two fields of sensilla

  8. Predicted new optically pumped FIR molecular lasers

    SciTech Connect (OSTI)

    Calloway, A.R.; Danielewicz, E.J.

    1981-09-01T23:59:59.000Z

    A total of nine CW FIR laser lines are reported from two new FIR laser molecules CH2CHF and S(O-18)2. These two are from a list of twelve candidate molecules that were predicted using a set of selection criteria. The candidate D2(O-18) was tested, but did not lase. Combining these results with independent studies on other candidates, brings the number of proven laser molecules to 4 out of 5 that were tested. These results confirm the value of the selection criteria as a guideline for predicting new optically pumped FIR laser molecules.

  9. E-Print Network 3.0 - asymmetric hetero-diels-alder reactions...

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

    Correction Paper No. b927076k Summary: . The classic hetero-Diels Alder reaction of acrolein with methyl vinyl ketone (Scheme 3) was examined in great... is unsymmetrically...

  10. E-Print Network 3.0 - alder bigleaf maple Sample Search Results

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

    Lichen and moss-covered bigleaf maple tree (Acer macrophyllum... ) in a coniferous forest Fruiting salmonberry (Rubus spectabilis) shrub beneath a red alder (Alnus rubra)...

  11. E-Print Network 3.0 - alder click chemistry Sample Search Results

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

    click chemistry Search Powered by Explorit Topic List Advanced Search Sample search results for: alder click chemistry Page: << < 1 2 3 4 5 > >> 1 Influence of species proportion...

  12. Low-Noise-Far-Infrared (FIR) Receiver tasks: FIR laser development. Final report

    SciTech Connect (OSTI)

    Foote, F.B.; Danielewicz, E.J.; Galantowicz, T.A.

    1984-12-31T23:59:59.000Z

    The objectives of the Low-Noise Far-Infrared (FIR) Receiver program for FIR laser development were established with the particular goal of improving magnetic fusion diagnostics in tokamak fusion reactors. Development of both FIR sources and receivers can greatly benefit such programs studying controlled nuclear fusion by providing vital data on particle velocity (temperature) and density through scattering measurements. The Department of Energy (DOE), through the University of California at Los Angeles (UCLA), has funded The Aerospace Corporation to design and implement state-of-the-art techniques in the FIR/near-millimeter-wave spectral region. Specific areas of interest to DOE are portable FIR lasers, near-millimeter-wave mixers, solid-state sources, and the integration of these areas into advanced diagnostic tools for plasma studies. This report documents the work accomplished in those areas of interest.

  13. Diels-Alder Cycloaddition for Fluorophore Targeting to Specific Proteins inside Living Cells

    E-Print Network [OSTI]

    -electron-demand Diels-Alder cycloaddition between trans-cyclooctenes and tetrazines is biocompatible and exceptionally by chemoselective derivatization with a tetrazine-fluorophore conjugate in the second step. On the cell surface-cycloalkyne cycloadditions,10 and inverse-electron-demand Diels-Alder cycloadditions of tetrazines and trans-cyclooctenes.11

  14. Alder Mutual Light Co, Inc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160 East 300 SouthWaterBrasilInformation 5-01Alchem LtdAlden, New York: EnergyAlder

  15. A SYNCHRONIZED FIR/VUV LIGHT SOURCE AT JEFFERSON LAB

    SciTech Connect (OSTI)

    Stephen Benson, David Douglas, George Neil, Michelle D. Shinn, Gwyn Williams

    2012-07-01T23:59:59.000Z

    We describe a dual free-electron laser (FEL) configuration on the UV Demo FEL at Jefferson Lab that allows simultaneous lasing at FIR/THz and UV wavelengths. The FIR/THz source would be an FEL oscillator with a short wiggler providing nearly diffraction-limited pulses with pulse energy exceeding 50 microJoules. The FIR source would use the exhaust beam from a UVFEL. The coherent harmonics in the VUV from the UVFEL are out-coupled through a hole. The FIR source uses a shorter resonator with either hole or edge coupling to provide very high power FIR pulses. Simulations indicate excel-lent spectral brightness in the FIR region with over 100 W/cm-1 output.

  16. Dependence of the Rate of an Interfacial Diels-Alder Reaction on the Steric Environment of the Immobilized Dienophile

    E-Print Network [OSTI]

    Mrksich, Milan

    Dependence of the Rate of an Interfacial Diels-Alder Reaction on the Steric Environment for an interfacial Diels-Alder reaction and the steric environment around the reacting molecules. The study used that the quinone groups that were positioned below the interface (and in a crowded environment) reacted

  17. The FIR-Radio Correlation & Implications for GLAST Observations

    E-Print Network [OSTI]

    Wurtele, Jonathan

    Energy Argument (synchrotron emission) · Rapid Electron Cooling in Starbursts ­ The Failure tsyn supplied by SN shocks Clean explanation for linear FIR supplied to CR e's consistent w/ inferences from SN shocks tesc > tsyn requires tremendous fine tuning

  18. Characteristics of the Two Frontier Orbital Interactions in the Diels-Alder Cycloaddition

    E-Print Network [OSTI]

    Spino, Claude

    Characteristics of the Two Frontier Orbital Interactions in the Diels-Alder Cycloaddition Claude by the two frontier orbital interactions emerged. It was demonstrated that in the case of normal Diels that can refine or modify the predictive power of existing tools are still very useful. The frontier

  19. A convergent intermolecular Diels-Alder approach to the spirocycles found in the marine neurotoxic agents, the gymnodimines

    E-Print Network [OSTI]

    Cohn, Stephen Todd

    2012-06-07T23:59:59.000Z

    S~N 101 / O ~ H O, S 101 68 OTBS 1. 0 equiv. EtsAICI, CHsCIs -30 0 OTBS 0 OsS 102 Considering the many possible variables that are involved in this asymmetric Diels-Alder, extensive experimentation will undoubtedly be necessary. Important.... Reaction of Dienes With Tulipalin-A (35a). Table 4. Reactivity of Diene 68 With Known Dienophiles. . . 36 36 Table 5. Diels-Alder Reaction of Dienophile 69 and (Z)-Diene 68. . . . Table 6. Effect of Isomeric Ratio of Diene 68 on Diels-Alder Reactions...

  20. Simulations of a FIR Oscillator with Large Slippage parameter at Jefferson Lab for FIR/UV pump-probe experiments

    SciTech Connect (OSTI)

    Benson, Stephen V. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Campbell, L. T. [University of Strathclyde, Glasgow (Great Britain); Daresbury Laboratory and Cockcroft Institute, Warrington (Great Britain); McNeil, B.W.T. [University of Strathclyde, Glasgow (Great Britain); Neil, George R. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Shinn, Michelle D. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Williams, Gwyn P. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

    2014-03-01T23:59:59.000Z

    We previously proposed a dual FEL configuration on the UV Demo FEL at Jefferson Lab that would allow simultaneous lasing at FIR and UV wavelengths. The FIR source would be an FEL oscillator with a short wiggler providing diffraction-limited pulses with pulse energy exceeding 50 microJoules, using the exhaust beam from a UVFEL as the input electron beam. Since the UV FEL requires very short pulses, the input to the FIR FEL is extremely short compared to a slippage length and the usual Slowly Varying Envelope Approximation (SVEA) does not apply. We use a non-SVEA code to simulate this system both with a small energy spread (UV laser off) and with large energy spread (UV laser on).

  1. Breaking FIR-Radio Correlation: The Case of Interacting Galaxies

    E-Print Network [OSTI]

    Donevski, Darko

    2015-01-01T23:59:59.000Z

    Far-infrared (FIR)--radio correlation is a well-established empirical connection between continuum radio and dust emission of star-forming galaxies, used as a tool in determining star-formation rates. Here we point out that in the case of interacting star-forming galaxies this tool might break. Galactic interactions and mergers have been known to give rise to tidal shocks and disrupt morphologies especially in the smaller of the interacting components. Moreover, these shocks can also heat the gas and dust and accelerate particles leading to tidal cosmic-ray population in addition to standard galactic cosmic rays. Both heating and additional non-thermal radiation will obviously affect the FIR-radio correlation of these systems. To test this hypothesis we have analyzed a sample of 43 infrared bright star-forming interacting galaxies at different merger stages. We have found that their FIR-radio correlation parameter and radio emission spectral index vary over different merger stages and behave as it would be ex...

  2. Analog FIR Filter Used for Range-Optimal Pulsed Radar Applications

    E-Print Network [OSTI]

    Su, Eric Chen

    2014-08-13T23:59:59.000Z

    .......................................................................................................... 1 1.1. Radar system ...................................................................................................... 2 1.2 Matched filter ...................................................................................................... 4... 1.3 Analog FIR matched filters ................................................................................. 4 1.4 Thesis organization ............................................................................................. 6 2...

  3. E-Print Network 3.0 - appalachian spruce fir Sample Search Results

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

    topography, and potential insolation on the Summary: United States (Noss et al. 1995; White and Miller 1998). Appalachian montane spruce-fir forests... by wind, with natural...

  4. Characterisation of pulsed Carbon fiber illuminators for FIR instrument calibration

    E-Print Network [OSTI]

    S. Henrot-Versille; R. Cizeron; F. Couchot

    2007-07-31T23:59:59.000Z

    We manufactured pulsed illuminators emitting in the far infrared for the Planck-HFI bolometric instrument ground calibrations. Specific measurements have been conducted on these light sources, based on Carbon fibers, to understand and predict their properties. We present a modelisation of the temperature dependence of the thermal conductivity and the calorific capacitance of the fibers. A comparison between simulations and bolometer data is given, that shows the coherence of our model. Their small time constants, their stability and their emission spectrum pointing in the submm range make these illuminators a very usefull tool for calibrating FIR instruments.

  5. Characterisation of pulsed Carbon fiber illuminators for FIR instrument calibration

    E-Print Network [OSTI]

    Henrot-Versillé, S; Couchot, F

    2007-01-01T23:59:59.000Z

    We manufactured pulsed illuminators emitting in the far infrared for the Planck-HFI bolometric instrument ground calibrations. Specific measurements have been conducted on these light sources, based on Carbon fibers, to understand and predict their properties. We present a modelisation of the temperature dependence of the thermal conductivity and the calorific capacitance of the fibers. A comparison between simulations and bolometer data is given, that shows the coherence of our model. Their small time constants, their stability and their emission spectrum pointing in the submm range make these illuminators a very usefull tool for calibrating FIR instruments.

  6. G. AussenacEcophysiology of circum-Mediterranean firs Original article

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of circum-Mediterranean firs in the context of climate change Gilbert Aussenac* UMR �cologie, �cophysiologie / circum-Mediterranean firs / climate change / ecology / ecophysiology Résumé ­ �cologie et écophysiologie) Abstract ­ In the expected climatic change scenario (with increased temperatures and water deficits

  7. Structural properties of laminated Douglas fir/epoxy composite material

    SciTech Connect (OSTI)

    Spera, D.A. (National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center) [National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center; Esgar, J.B. (Sverdrup Technology, Inc., Cleveland, OH (USA)) [Sverdrup Technology, Inc., Cleveland, OH (USA); Gougeon, M.; Zuteck, M.D. (Gougeon Bros., Bay City, MI (USA)) [Gougeon Bros., Bay City, MI (USA)

    1990-05-01T23:59:59.000Z

    This publication contains a compilation of static and fatigue and strength data for laminated-wood material made from Douglas fir and epoxy. Results of tests conducted by several organizations are correlated to provide insight into the effects of variables such as moisture, size, lamina-to-lamina joint design, wood veneer grade, and the ratio of cyclic stress to steady stress during fatigue testing. These test data were originally obtained during development of wood rotor blades for large-scale wind turbines of the horizontal-axis (propeller) configuration. Most of the strength property data in this compilation are not found in the published literature. Test sections ranged from round cylinders 2.25 in. in diameter to rectangular slabs 6 in. by 24 in. in cross section and approximately 30 ft long. All specimens were made from Douglas fir veneers 0.10 in. thick, bonded together with the WEST epoxy system developed for fabrication and repair of wood boats. Loading was usually parallel to the grain. Size effects (reduction in strength with increase in test volume) are observed in some of the test data, and a simple mathematical model is presented that includes the probability of failure. General characteristics of the wood/epoxy laminate are discussed, including features that make it useful for a wide variety of applications. 9 refs.

  8. UV and FIR selected star-forming galaxies at z=0: differences and overlaps

    E-Print Network [OSTI]

    C. Kevin Xu; Veronique Buat; Jorge Iglesias-Páramo; Tsutomu T. Takeuchi; Tom A. Barlow; Luciana Bianchi; Jose Donas; Karl Forster; Timothy M. Heckman; Patrick N. Jelinsky; Young-Wook Lee; Barry F. Madore; Roger F. Malina; D. Christopher Martin; Bruno Milliard; Patrick Morrissey; R. Michael Rich; Susan G. Neff; David Schiminovich; Oswald H. W. Siegmund; Todd Small; Alex S. Szalay; Barry Y. Welsh; Ted K. Wyder; Sukyoung Yi

    2006-04-04T23:59:59.000Z

    We study two samples of local galaxies, one is UV (GALEX) selected and the other FIR (IRAS) selected, to address the question whether UV and FIR surveys see the two sides ('bright' and 'dark') of the star formation of the same population of galaxies or two different populations of star forming galaxies. No significant difference between the L$_{tot}$ ($=L_{60}+L_{FUV}$) luminosity functions of the UV and FIR samples is found. Also, after the correction for the `Malmquist bias' (bias for flux limited samples), the FIR-to-UV ratio v.s. L$_{tot}$ relations of the two samples are consistent with each other. In the range of $9 \\la \\log(L_{tot}/L_\\sun) \\la 12$, both can be approximated by a simple linear relation of $\\log (L_{60}/L_{FUV})=\\log(L_{tot}/L_\\sun)-9.66$. These are consistent with the hypothesis that the two samples represent the same population of star forming galaxies, and their well documented differences in L$_{tot}$ and in FIR-to-UV ratio are due only to the selection effect. A comparison between the UV luminosity functions shows marginal evidence for a population of faint UV galaxies missing in the FIR selected sample. The contribution from these 'FIR-quiet' galaxies to the overall UV population is insignificant, given that the K-band luminosity functions (i.e. the stellar mass functions) of the two samples do not show any significant difference.

  9. ISO observations of spirals: modelling the FIR emission

    E-Print Network [OSTI]

    Simone Bianchi; Paul B. Alton; Jonathan I. Davies

    1999-10-01T23:59:59.000Z

    ISO observations at 200 micron have modified our view of the dust component in spiral galaxies. For a sample of seven resolved spirals we have retrieved a mean temperature of 20K, about 10K lower than previous estimates based on IRAS data at shorter wavelengths. Because of the steep dependence of far-infrared emission on the dust temperature, the dust masses inferred from ISO fluxes are a factor of 10 higher than those derived from IRAS data only, leading to gas-to-dust ratios close to the value observed in the Galaxy. The scale-length of the 200 micron emission is larger than for the IRAS 100 micron emission, with colder dust at larger distances from the galactic centre, as expected if the interstellar radiation field is the main source of dust heating. The 200 micron scale-length is also larger than the optical, for all the galaxies in the sample. This suggests that the dust distribution is more extended than that of the stars.A model of the dust heating is needed to derive the parameters of the dust distribution from the FIR emission. Therefore, we have adapted an existing radiative transfer code to deal with dust emission. Simulated maps of the temperature distribution within the dust disk and of the dust emission at any wavelength can be produced. The stellar spectral energy distribution is derived from observations in the ultraviolet, optical and near infrared. The parameters of the dust distribution (scale-lengths and optical depth) are chosen to reproduce the observed characteristics of the FIR emission, i.e. the shape of the spectrum, the flux and the spatial distribution. We describe the application of the model to one of the galaxies in the sample, NGC 6946.

  10. Nucleotide diversity and neutrality testing in genes involved in adaptation in Douglas-fir

    E-Print Network [OSTI]

    Nucleotide diversity and neutrality testing in genes involved in adaptation in Douglas-fir B. Pande-Oregon region, and 684 SNPs were identified in total. We report the estimation of nucleotide diversity and tests

  11. Quantification and comparison of terpene concentrations in various balsam fir growth forms and foliage ages, and a simulation of moose browsing on balsam fir trees at Isle Royale

    E-Print Network [OSTI]

    Terra-Berns, Mary Helen

    1993-01-01T23:59:59.000Z

    ) and twigs (T) of growth form samples collected from Windigo and Beaver Island. . . . . . . . . . 10 Table 2. Means and standard deviations for foliage age samples (means followed by the same letter are not significantly different... terpene compounds from the needles and twigs of balsam fir samples collected by Risenhoover (unpubl. data) at 2 sites in the Washington Harbor area of Isle Royale during late February of 1985 (Windigo) and 1986 (Beaver Island). The following classes...

  12. Si Ris6 Report No. 220 fiR.0--3ao

    E-Print Network [OSTI]

    Si Ris6 Report No. 220 £ fiR.0--3ao c 8. * Danish Atomic Energy Commission · 1 Research and J. Lippert The Danish Atomic Energy Commission Research Establishment RisO Health Physics Department-90 was determined in samples from all over the country of precipitation, soil, ground water, sea

  13. Fungal endophytes in woody roots of Douglas-fir (Pseudotsuga menziesii) and ponderosa pine (Pinus ponderosa)

    E-Print Network [OSTI]

    Fungal endophytes in woody roots of Douglas-fir (Pseudotsuga menziesii) and ponderosa pine (Pinus baseline data for future surveys of fungal endophytes. Examination of internal transcribed spacer (ITS1 evidence of host species or plant association effects on total recovery of fungal endophytes or recovery

  14. Characteristics of subalpine fir susceptible to attack by western balsam bark beetle (Coleoptera

    E-Print Network [OSTI]

    Lindgren, Staffan

    Characteristics of subalpine fir susceptible to attack by western balsam bark beetle (Coleoptera beetle (Dryocoetes confusus Swaine) predominately attacked trees from the three to four largest diameter classes at each site. However, the mean diameter of attacked trees was significantly different among sites

  15. Blind Identification of MIMO FIR Systems Driven by Quasi-Stationary Sources Using Second Order

    E-Print Network [OSTI]

    Reilly, James P.

    1 Blind Identification of MIMO FIR Systems Driven by Quasi-Stationary Sources Using Second Order This paper discusses a frequency domain method for blind identification of MIMO convolutive channels driven are presented to demonstrate the performance of the new algorithm1 . I. Introduction Blind identification

  16. Blind identification of MISO-FIR channels Carlos Est^ev~ao R. Fernandes

    E-Print Network [OSTI]

    Boyer, Edmond

    Blind identification of MISO-FIR channels Carlos Est^ev~ao R. Fernandes , Pierre Comon , G, vol.90 Abstract In this paper, we address the problem of determining the order of MISO channels to false alarm. Afterwards, we introduce the concept of MISO channel nested detectors based on a deflation

  17. A DESIGN FLOW FOR MULTIPLIERLESS LINEAR-PHASE FIR FILTERS: FROM SYSTEM SPECIFICATION TO VERILOG CODE

    E-Print Network [OSTI]

    Hung, Shih-Hao

    , National Taiwan University, Taipei 106, Taiwan, ROC *Department of Electrical Engineering, National Central-phase FIR filter synthesizer, which combines several research efforts. We propose a local search algorithm in decreasing the design cycle time and accurately simulating the correctness of the circuit design

  18. Oyamel fir forest trunks provide thermal advantages for overwintering monarch butterflies in Mexico

    E-Print Network [OSTI]

    Williams, Ernest H.

    Oyamel fir forest trunks provide thermal advantages for overwintering monarch butterflies in Mexico, UniversidadNacionalAutonomadeMexico,AntiguaCarreteraaPa´ tzcuaro,Morelia,Michoacan,Mexico,5 InstitutodeGeografi´aCiudad Universitaria,UniversidadNacionalAutonomadeMexico,Coyoacan,MexicoD.F.,Mexico,6 Departmentof

  19. An Efficient Arithmetic Sum-of-Product (SOP) based Multiplication Approach for FIR Filters and DFT

    E-Print Network [OSTI]

    Kumar, Rajeev

    2013-04-24T23:59:59.000Z

    , the output of a FIR filter is the weighted sum of the current value and a finite number of previous values of the input. An important property of FIR filters is their inherent stability due to the lack of feedback from the output. Y (n) = N?1 ? l=0 x(n... . . . . . . +++ . . . . . .+ + + + MCM z?1 z?1 z?1 z?1 a) Direct Form Realization z?1 z?1 z?1 z?1 b) Transposed Direct Form Realization c0 c1 c2 c3 cN?1 cN?3cN?1 c0cN?2 x(n) x(n) SOP Y (n) Y (n) cN?4 Fig. I.1. Implementation of DFT The previous approaches for solving...

  20. Submm/FIR astronomy in Antarctica: Potential for a large telescope facility

    E-Print Network [OSTI]

    Vincent Minier; V. Minier; L. Olmi; P. -O. Lagage; L. Spinoglio; G. A. Durand; E. Daddi; D. Galilei; H. Gallee; C. Kramer; D. Marrone; E. Pantin; L. Sabbatini; N. Schneider; N. Tothill; L. Valenziano; C. Veyssiere

    2008-05-16T23:59:59.000Z

    Preliminary site testing datasets suggest that Dome C in Antarctica is one of the best sites on Earth for astronomical observations in the 200 to 500 micron regime, i.e. for far-infrared (FIR) and submillimetre (submm) astronomy. We present an overview of potential science cases that could be addressed with a large telescope facility at Dome C. This paper also includes a presentation of the current knowledge about the site characterics in terms of atmospheric transmission, stability, sky noise and polar constraints on telescopes. Current and future site testing campaigns are finally described.

  1. Please cite this article in press as: Hart, S.J., Laroque, C.P., Searching for thresholds in climateradial growth rela-tionships of Engelmann spruce and subalpine fir, Jasper National Park, Alberta, Canada. Dendrochronologia (2012),

    E-Print Network [OSTI]

    Walters, Bradley B.

    in climate­radial growth rela- tionships of Engelmann spruce and subalpine fir, Jasper National Park, Alberta for thresholds in climate­radial growth relationships of Engelmann spruce and subalpine fir, Jasper National Park

  2. Resistance of fast-and slow-growing subalpine fir to pheromone-induced attack by western balsam bark beetle (Coleoptera

    E-Print Network [OSTI]

    Lindgren, Staffan

    Resistance of fast- and slow-growing subalpine fir to pheromone- induced attack by western balsam the resistance of fast- and slow-growing subalpine fir to pheromone-induced attack by western balsam bark beetle at two sites in the interior of British Columbia, Canada. 2 Attack success by the beetle and subsequent

  3. LOW-FREQUENCY RADIO-FIR CORRELATION IN NORMAL GALAXIES AT {approx}1 kpc SCALES

    SciTech Connect (OSTI)

    Basu, Aritra; Roy, Subhashis; Mitra, Dipanjan, E-mail: aritra@ncra.tifr.res.in, E-mail: roy@ncra.tifr.res.in, E-mail: dmitra@ncra.tifr.res.in [National Center for Radio Astrophysics, TIFR, Pune University Campus, Ganeshkhind Road, Pune-411007 (India)

    2012-09-10T23:59:59.000Z

    We study the radio-FIR correlation between the nonthermal (synchrotron) radio continuum emission at {lambda}90 cm (333 MHz) and the far-infrared emission due to cool ({approx}20 K) dust at {lambda}70 {mu}m in spatially resolved normal galaxies at scales of {approx}1 kpc. The slope of the radio-FIR correlation significantly differs between the arm and interarm regions. However, this change is not evident at a lower wavelength of {lambda}20 cm (1.4 GHz). We find the slope of the correlation in the arm to be 0.8 {+-} 0.12 and we use this to determine the coupling between equipartition magnetic field (B{sub eq}) and gas density ({rho}{sub gas}) as B{sub eq}{proportional_to}{rho}{sup 0.51{+-}0.12}{sub gas}. This is close to what is predicted by magnetohydrodynamic simulations of turbulent interstellar medium, provided the same region produces both the radio and far-infrared emission. We argue that at 1 kpc scales this condition is satisfied for radio emission at 1.4 GHz and may not be satisfied at 333 MHz. The change of slope observed in the interarm region could be caused by propagation of low energy ({approx}1.5 GeV) and long-lived ({approx}10{sup 8} yr) cosmic-ray electrons at 333 MHz.

  4. The UV to FIR spectral energy distribution of star-forming galaxies in the redshift desert

    E-Print Network [OSTI]

    Oteo, I; Magdis, G; Pérez-García, A M; Cepa, J; Cedrés, B; Sánchez, H Domínguez; Ederoclite, A; Sánchez-Portal, M; Pérez-Martínez, R; Pintos-Castro, I; Polednikova, J

    2013-01-01T23:59:59.000Z

    We analyze the rest-frame UV-to-near-IR spectral energy distribution (SED) of Lyman break galaxies (LBGs), star-forming (SF) BzK (sBzK), and UV-selected galaxies at 1.5 deep FIR data taken within the framework of the GOODS-Herschel project. According to their best-fitted SED-derived properties we find that, due to their selection criterion involving UV measurements, LBGs tend to be UV-brighter, bluer, have less prominent Balmer break (are younger), and have higher dust-corrected total SFR than sBzK galaxies. In a color versus stellar mass diagram, LBGs at z ~ 2 tend to be mostly located over the blue cloud of galaxies at their redshift, although galaxies with older ages, higher dust attenuation, and redder UV continuum slope deviate to the green valley and red sequence. We find PACS (100um or 160um) individual detection...

  5. [)r PAR1 rMF.Nr o Dr (.FIrMr( A .IF]CNC)I,OGIi,

    E-Print Network [OSTI]

    Guidoni, Leonardo

    [)r PAR1 rMF.Nr o Dr (.FIrMr( A E .IF]CNC)I,OGIi, f)Ã?]I I-ARMACo @ ;^.*r.l-EN,.m BANDO Dl SELEZIONE n. 17 PER lL CONFERIMENTO Dt N. 1 ASSEGNO PER LO SVOLGIMENTO Dl ATTIVITA DI RICERCA DI CATEGORIA B riunita la Commissione esaminatrice per il bando di selezione n. 17 relativo al conferimento di n. 1

  6. Energy Input and Quality of Pellets Made from Steam-Exploded Douglas Fir (Pseudotsuga menziesii)

    SciTech Connect (OSTI)

    Sokhansanj, Shahabaddine [ORNL; Bi, X.T. [University of British Columbia, Vancouver; Lim, C. Jim [University of British Columbia, Vancouver; Melin, Staffan [University of British Columbia, Vancouver

    2011-01-01T23:59:59.000Z

    Ground softwood Douglas fir (Pseudotsuga menziesii) was treated with pressurized saturated steam at 200-220 C (1.6-2.4 MPa) for 5-10 min in a sealed container. The contents of the container were released to the atmosphere for a sudden decompression. The steam-exploded wood particles were dried to 10% moisture content and pelletized in a single-piston-cylinder system. The pellets were characterized for their mechanical strength, chemical composition, and moisture sorption. The steamtreated wood required 12-81% more energy to compact into pellets than the untreated wood. Pellets made from steam-treated wood had a breaking strength 1.4-3.3 times the strength of pellets made from untreated wood. Steam-treated pellets had a reduced equilibrium moisture content of 2-4% and a reduced expansion after pelletization. There was a slight increase in the high heating value from 18.94 to 20.09 MJ/kg for the treated samples. Steam-treated pellets exhibited a higher lengthwise rigidity compared to untreated pellets.

  7. Similarity of nutrient uptake and root dimensions of Engelmann spruce and subalpine fir at two contrasting sites in Colorado

    SciTech Connect (OSTI)

    Yanai, R; McFarlane, K; Lucash, M; Kulpa, S; Wood, D

    2009-10-09T23:59:59.000Z

    Nutrient uptake capacity is an important parameter in modeling nutrient uptake by plants. Researchers commonly assume that uptake capacity measured for a species can be used across sites. We tested this assumption by measuring the nutrient uptake capacity of intact roots of Engelmann spruce (Picea engelmanni Parry) and subalpine fir (Abies lasiocarpa (Hook.) Nutt.) at Loch Vale Watershed and Fraser Experimental Forest in the Rocky Mountains of central Colorado. Roots still attached to the tree were exposed to one of three concentrations of nutrient solutions for time periods ranging from 1 to 96 hours, and solutions were analyzed for ammonium, nitrate, calcium, magnesium, and potassium. Surprisingly, the two species were indistinguishable in nutrient uptake within site for all nutrients (P > 0.25), but uptake rates differed by site. In general, nutrient uptake was higher at Fraser (P = 0.01, 0.15, 0.03, 0.18 for NH{sub 4}{sup +}, NO{sub 3}{sup -}, Ca{sup 2+}, and K{sup +}, respectively), which is west of the Continental Divide and has lower atmospheric deposition of N than Loch Vale. Mean uptake rates by site for ambient solution concentrations were 0.12 {micro}mol NH{sub 4}{sup +} g{sub fwt}{sup -1} h{sup -1}, 0.02 {micro}mol NO{sub 3}{sup -} g{sub fwt}{sup -1}, 0.21 {micro}mol Ca{sup 2+} g{sub fwt}{sup -1} h{sup -1}, and 0.01 {micro}mol Mg{sup 2+} g{sub fwt}{sup -1} h{sup -1} at Loch Vale, and 0.21 {micro}mol NH{sub 4}{sup +} f{sub fwt}{sup -1}h{sup -1}, 0.04 {micro}mol NO{sub 3}{sup -} g{sub fwt}{sup -1} h{sup -1}, 0.51 {micro}mol Ca{sup 2+}g{sub fwt}{sup -1}h{sup -1}, and 0.07 {micro}mol Mg{sup 2+} f{sub fwt}{sup -1}h{sup -1} at Fraser. The importance of site conditions in determining uptake capacity should not be overlooked when parameterizing nutrient uptake models. We also characterized the root morphology of these two species and compared them to other tree species we have measured at various sites in the northeastern USA. Engelman spruce and subalpine fir were indistinguishable in specific root length and diameter distribution, while most of the other ten species had statistically distinct diameter distributions across five diameter classes < 2 mm. Based on specific root length, subalpine fir and Engelmann spruce had significantly coarser roots than red pine (Pinus resinosa Soland), yellow birch (Betula allegheniensis Britt.), sugar maple (Acer saccharum Marsh.), chestnut oak (Quercus prinus L.), black cherry (Prunus serotina Ehrh.), and red spruce (Picea rubens Sarg.). White oak (Quercus alba L.), balsam fir (Abies balsamea (L.) Mill.), American beech (Fagus grandifolia Ehrh.) and loblolly pine (Pinus taeda L.) were intermediate in SRL (indistinguishable from Engelmann spruce and subalpine fir by ANOVA). Species that differ more in physiology and morphology than the two species we compared would likely show dissimilar uptake characteristics even at the same site.

  8. Hemlock, Michigan: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to: navigation,Ohio:Greer CountyCorridorPartImages Jump to: navigation,Entry

  9. Population differentiation in tree-ring growth response of white fir (Abies concolor) to climate: Implications for predicting forest responses to climate change

    SciTech Connect (OSTI)

    Jensen, D.B.

    1993-10-01T23:59:59.000Z

    Forest succession models and correlative models have predicted 200--650 kilometer shifts in the geographic range of temperate forests and forest species as one response to global climate change. Few studies have investigated whether population differences may effect the response of forest species to climate change. This study examines differences in tree-ring growth, and in the phenotypic plasticity of tree-ring growth in 16-year old white fir, Abies concolor, from ten populations grown in four common gardens in the Sierra Nevada of California. For each population, tree-ring growth was modelled as a function of precipitation and degree-day sums. Tree-ring growth under three scenarios of doubled C0{sub 2} climates was estimated.

  10. Investigation of Temperature Dependent Optical Modes in GexAs35-xSe65 Thin Films: Structure Specific Raman, FIR and Optical Absorption Spectroscopy

    E-Print Network [OSTI]

    Khan, Pritam; Joshy, Abin; Sathe, Vasant; Deshpande, Uday; Adarsh, K V

    2015-01-01T23:59:59.000Z

    In this article, we present a comprehensive study of temperature and composition dependent Raman spectroscopy of GexAs35-xSe65 thin films to understand different structural units responsible for optical properties. Strikingly, our experimental results uncover the ratio of GeSe4/2 tetrahedral and AsSe3/2 pyramidal units in GexAs35-xSe65 thin films and their linear scaling relationship with temperature and x. An important notable outcome of our study is the formation of Se8 rings at lower temperatures. Our experimental results further provide interesting optical features, thermally and compositionally tunable optical absorption spectra. Detailed structure specific FIR data at room temperature also present direct information on the structural units in consistent with Raman data. We foresee that our studies are useful in determining the lightinduced response of these films and also for their potential applications in optics and optoelectronics.

  11. (1) Determine how topography is related to the spatial distribution

    E-Print Network [OSTI]

    and cool dry summers. Dominant tree species include Douglas-fir (Pseudotsuga menziesii), western hemlock and 3). Terrain is rugged and steep, with a dense network of streams and a climate with warm wet winters-fire salvage b. Stand Basal Area vs Dead Wood Volume 0 20 40 60 80 100 120 0 200 400 600 800 1000 1200 Volume

  12. First results from the FPGA/NIOS Adaptive FIR Filter Using Linear Prediction Implemented in the AERA Radio Stations to Reduce Narrow Band RFI for Radio Detection of Cosmic Rays

    E-Print Network [OSTI]

    Zbigniew Szadkowski; D. G?as; C. Timmermans; T. Wijnen for the Pierre Auger Collaboration

    2014-06-03T23:59:59.000Z

    The FPGA/NIOS FIR filter based on linear prediction (LP) to suppress radio frequency interference (RFI) has been installed in several radio stations in the Auger Engineering Radio Array (AERA) experiment. AERA observes coherent radio emission from extensive air showers induced by ultra-high-energy cosmic rays to make a detailed study of the development of the electromagnetic part of air showers. Radio signals provide complementary information to that obtained from Auger surface detectors, which are predominantly sensitive to the particle content of an air shower at the surface. The radio signals from air showers are caused by the coherent emission due to geomagnetic and charge-excess processes. These emissions can be observed in the frequency band between 10 - 100 MHz. However, this frequency range is significantly contaminated by narrow-band RFI and other human-made distortions. A FIR filter implemented in the FPGA logic segment of the front-end electronics of a radio sensor significantly improves the signal-to-noise ratio. In this paper we present first results of the efficiency of the adaptive LP FIR filter, deployed in real AERA station on pampas, with a comparison to the currently used IIR notch filter with constant coefficients. The laboratory tests confirms the stability of the filter. Using constant LP coefficients the suppression efficiency remains the same for hours, which corresponds to more than $\\bf 10^{12}$ clock cycles. We compared in real conditions several variants of the LP FIR filter with various lengths and various coefficients widths (due to fixed-point representations in the FPGA logic) with the aim to minimize the power consumption for the radio station while keeping sufficient accuracy for noise reduction.

  13. Stand-Level Gas-Exchange Responses to Seasonal Drought in Very Young Versus Old Douglas-fir Forests of the Pacific Northwest, USA

    SciTech Connect (OSTI)

    Wharton, S; Schroeder, M; Bible, K; Falk, M; Paw U, K T

    2009-02-23T23:59:59.000Z

    This study examines how stand age affects ecosystem mass and energy exchange response to seasonal drought in three adjacent Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) forests. The sites include two early seral stands (ES) (0-15 years old) and an old-growth (OG) ({approx} 450-500) forest in the Wind River Experiment Forest, Washington, USA. We use eddy covariance flux measurements of carbon dioxide (F{sub NEE}), latent energy ({lambda}E) and sensible heat (H) to derive evapotranspiration rate (E{sub T}), bowen ratio ({beta}), water use efficiency (WUE), canopy conductance (G{sub c}), the Priestley-Taylor coefficient ({alpha}) and a canopy decoupling factor ({Omega}). The canopy and bulk parameters are examined to see how ecophysiological responses to water stress, including changes in available soil water ({theta}{sub r}) and vapor pressure deficit ({delta}e) differ among the two forest successional-stages. Despite very different rainfall patterns in 2006 and 2007, we observed distinct successional-stage relationships between E{sub T}, {alpha}, and G{sub c} to {delta}e and {theta}{sub r} during both years. The largest stand differences were (1) higher morning G{sub c} (> 10 mm s{sup -1}) at the OG forest coinciding with higher CO{sub 2} uptake (F{sub NEE} = -9 to -6 {micro}mol m{sup -2} s{sup -1}) but a strong negative response in G{sub c} to moderate {delta}e later in the day and a subsequent reduction in E{sub T}, and (2) higher E{sub T} at the ES stands because midday canopy conductance did not decrease until very low water availability levels (<30%) were reached at the end of the summer. Our results suggest that early seral stands are more likely than mature forests to experience declines in production if the summer drought becomes longer or intensifies because water conserving ecophysiological responses were only observed at the very end of the seasonal drought period in the youngest stands.

  14. Quantitative analyses of plant remains from the NAN Ranch Ruin, Grant County, New Mexico

    E-Print Network [OSTI]

    Rose, Carolyn June

    2004-11-15T23:59:59.000Z

    cottonwood, ponderosa pine (Pinus ponderosa Lawson), oak, unspecified pine, Douglas fir [Pseudotsuga menziesii (Mirb.) Franco], boxelder, walnut, ash, and alder in macrobotanical samples from the NAN Ranch Ruin. Ponderosa pine and Douglas fir, typical... (N440/W510) consisted of 1.00 m2 stratigraphic blocks that were excavated in 10 cm levels. Late Pithouse midden deposits in the Southeast Midden area were 60 to 80 cm thick and contained ash lenses that Shafer (1991a:4,6) attributed to fire...

  15. alder stands budgets: Topics by E-print Network

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

    oriented synthesis of PPAPs scaffold via sequential one pot (more) Sow, Boubacar 2013-01-01 87 2011 Waves -1 STANDING WAVES Physics Websites Summary: , we can also write c f...

  16. alder blumer eugenics: Topics by E-print Network

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

    by declination: Divide the catalog objects into "buckets" by declination, where each bucket 214 A Digital Humanities Approach to the History of Science Eugenics revisited in...

  17. Electronic effects in the Diels-Alder reactions of vinylboranes

    E-Print Network [OSTI]

    Watson, Jose Vernon

    1992-01-01T23:59:59.000Z

    &H NMR spectrum of the oxidized products in the competitive reaction of 4a and 4b with vinyl-9-BBN 10 tH NMR spectrum of the oxidized products in the competitive reaction of 4b and 4c with vinyl-9-BBN 11 tH NMR spectrum of trivinylborane. 12 t...~C NMR spectrum of trivinylborane . 13 Plot of the reaction ratio versus time 17 21 22 26 27 in the reaction of 4a with trivinylborane 31 LIST OF FIGURES (Continued) 14 Plot of the reaction ratio versus time in the reaction of cyclopentadiene...

  18. alder-winter theory: Topics by E-print Network

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

    and mutlilinear algebra. George Svetlichny 1999-03-12 450 Benchmarking Nuclear Fission Theory Nuclear Experiment (arXiv) Summary: We suggest a small set of fission observables...

  19. alder alnus acuminata: Topics by E-print Network

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

    fixation in the watershed soils and the associated N flux to the lake Hu, Feng Sheng 10 Multivariate analysis of allozymic and quantitative trait variation in Alnus rubra...

  20. alder receives national: Topics by E-print Network

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

    through frequency detuning in a coupled set of local obtainedby detuning the end elements of the local oscillator array. It is possible to increasethe York, Robert A. 228...

  1. andean alder alnus: Topics by E-print Network

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

    de Santander (D. klagesi): ICN35570, Colombia, Norte de Santander, Ocaa, Agua de la Virgen, -73.40, 08.23. 4. hellmayri (D. hellmayri): ANDES-BT994, Colombia Cuervo,...

  2. MHK Projects/White Alder Project | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth's Heat JumpIncMAKGalway Bay IE < MHKInformation Breton Island

  3. SEED SOURCE ASSESSMENTS--DOUGLAS-FIR

    E-Print Network [OSTI]

    Standiford, Richard B.

    (TGC, RGC) just after lifting and after cold storage, and for survival and growth on cleared planting extent are TGC and RGC at lifting altered by seedling cold storage to spring planting time? · When during the winter season can seedlings in the nursery be safely lifted for cold storage and spring planting? · How

  4. Climate, geography, and tree establishment in Subalpine Meadows of the Olympic Mountains, Washington, U.S.A.

    SciTech Connect (OSTI)

    Woodward, A.; Silsbee, D.G. [Univ. of Washington, Seattle, WA (United States); Schreiner, E.G. [National Biological Service, Port Angeles, WA (United States)

    1995-08-01T23:59:59.000Z

    Noticeable changes in vegetation distribution have occurred in the Pacific Northwest during the last century as trees have established in some subalpine meadows. To study the relationship of this process to climate, recently established trees were aged in six subalpine meadows in the Olympic Mountains, Washington. The sites represent three points along a steep precipitation gradient. Subalpine fir (Abies lasiocarpa) has been establishing at the dry end of the gradient, mountain hemlock (Tsuga mertensiana) at the wet end, and both species in the center. Establishment patterns were compared with deviations from the century-long average for these weather variables: winter precipitation, Palmer Drought Severity Index, and winter, October and May temperatures. Results show that establishment occurred in dry areas when weather conditions were wetter than average, and in wet areas under drier than average conditions. Establishment at central sites did not show consistent relationships with climate. If future climatic conditions continue to warm, establishment of subalpine fir in subalpine meadows in dry areas may cease and mountain hemlock may resume in wet areas. 34 refs., 5 figs., 3 tabs.

  5. Development of Three Reaction Methodologies En Route to Nitrogen Containing Heterocycles: a Diels-Alder/Schmidt, a DIels-Alder/Acylation and a Catalytic Intramolecular Schmidt

    E-Print Network [OSTI]

    Hirt, Erin Elaine

    2009-09-29T23:59:59.000Z

    or DMSO 8% N 3 5 An activated azido diene, (E)-(6-azidohexa-1,3-dien-2-yloxy)trimethylsilane (10), was also prepared for investigation in this study (Scheme 8). The Michael addition of sodium azide to acrolein provided the azido aldehyde 7 in nearly... acyclic azido enones as starting materials (Scheme 9). Thus, 9 and 12 were synthesized in two steps from acrolein in a similar manner to silyloxydiene 10. This synthesis began with a Michael addition into acrolein and was followed by a Horner...

  6. Design and analysis of FIR filters based on Matlab.

    E-Print Network [OSTI]

    Peng, Su

    2013-01-01T23:59:59.000Z

    ?? In digital control system, interference, which is mixed in the input signal, has a great influence on the performance of the system. Therefore, processing… (more)

  7. Cytokinin nucleotides contents in sexual buds of Douglas-fir

    SciTech Connect (OSTI)

    Imbault, N.; Doumas, P.; Bonnet-Masimbert, N. (INRA Station, Ardon (France)); Pethe, C.; Laloue, M. (CNRS Physiologie, Gif-sur-Yvette (France))

    1989-04-01T23:59:59.000Z

    Cytokinin nucleotides were extracted from male and female buds of Pseudotsuga menxiesii by 10 % perchloric acid. They were prepurified on cation exchanger columns (CBA, Amersham) and then separated by two HPLC systems. The first one (Partisil 10 SAX, 10{mu}m, Wathman) separates the mono-, di- and tri-phosphates groups which were collected. The second one (Ultraspher, 5 {mu}m, Beckman) separates the cytokinin nucleotides inside each group. After separation, cytokinin nucleotides were assayed by radioimmunoassay with anti ribosyl zeatin (RZ) and anti isopentenyladenosine (iPA) antibodies. The analysis showed in the monophosphate (mono-P) group one immunoreactant peak in RZ fraction which co-chromatographied with RZ-5{prime}-mono-P and two peaks in the iPA fraction. One of them co-chromatographied with iPA-5{prime}-mono-P. In the diphosphate group, there were three peaks which reacted with anti RZ antibodies and one with anti iPA antibodies. The nucleotides obtained after the first HPLC system, were hydrolysed by a 5{prime}-nucleotidase showed compounds co-chromatographing with RZ and iPA. We did not observe any qualitative differences between the male and female buds. This is the first evidence of cytokinin nucleotides in tissue from woody plants.

  8. A syncrhronized FIR/VUV light source at Jefferson Lab

    SciTech Connect (OSTI)

    Shinn, Michelle D. [JLAB, Newport News, VA (United States)

    2013-05-31T23:59:59.000Z

    This slide show presents an introduction to Free-Electron Lasers (FELs) and what makes the JLab FELs unique. Ways of exploring the nature of matter with the FEL are shown, including applications in the THz, IR, UV, and VUV. The Jefferson Lab FEL Facility is unique in its high average brightness in the THz, and IR -- VUV spectral regions and Sub ps-pulses at MHz repetition rates. With an installation of a rebuilt 'F100' cryomodule the linac energy will increase to > 150MeV. This will permit lasing further into the UV and extend VUV. With the swap of our CEBAF-style cryounit for an improved booster, we could lase in the VUV. Addition of a wiggler and optical cavity slightly canted from the UV beamline would allow simultaneous lasing of UV and THz for high E-field 2 color experiments.

  9. JASPERSE CHEM 341 TEST 4 VERSION 1 Conjugation, Diels-Alder, Aromaticity, Aromatic Reactions

    E-Print Network [OSTI]

    Jasperse, Craig P.

    byproducts). (21 points, 3 points each) SO3HHO HNO3, H 2SO4 O + 1. HNO3, H 2SO4 2. Cl2, AlCl 3 3. Fe, HCl 1

  10. A combined intramolecular Diels-Alder/intramolecular Schmidt reaction: Formal synthesis of (+/-)-stenine

    E-Print Network [OSTI]

    Golden, Jennifer E.; Aubé , Jeffrey

    2002-01-01T23:59:59.000Z

    , PPh 3 , CH 2 Cl 2 ; (c) 1-phenyl- 1H-tetrazole-5-thiol, NaH, DMF; (d) m-CPBA, NaHCO 3 , CH 2 Cl 2 . [14] I. Paterson, K. S. Yeung, J. B. Smaill, Synlett 1993, 774-776. 8 [15] J. H. Boyer, J. Am. Chem. Soc. 1951, 73, 5248-5252. [16] a) A. Greenberg...

  11. E-Print Network 3.0 - alder alnus incana Sample Search Results

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

    collected from Populus angustifolia James, Populus tremuloides Michx., ... Source: Stiller, Volker - Department of Biological Sciences, Southeastern Louisiana University...

  12. E-Print Network 3.0 - alder alnus glutinosa Sample Search Results

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

    ... Source: Forest Research Agency of the UK Forestry Commission Collection: Renewable Energy 8 Abstract Field ectomycorrhizae of Naucoria escharoides on Alnus acuminata ("andean...

  13. Theory of gated hemicarcerands and Diels-Alder reactions of tetrazines

    E-Print Network [OSTI]

    LIU, FANG

    2014-01-01T23:59:59.000Z

    tags with fluorogenic tetrazine cycloadditions. Angew. Chem.M. ; Fox, J. M. Tetrazine ligation: fast bioconjugationR. ; Hilderbrand, S. A. Tetrazine-based cycloadditions:

  14. ALDER, COTTONWOOD, AND SYCAMORE DISTRIBUTION AND REGENERATION ALONG THE NACIMIENTO RIVER, CALIFORNIAI

    E-Print Network [OSTI]

    . It and the San Antonio River have parallel courses, and each is a major tributary to the north-flowing Salinas-1977 drought, cattle concentra tions were excessively high and the range condi tion deteriorated. However

  15. Vinylboranes as trans-dihydroxyethylene equivalents in Diels-Alder reactions

    E-Print Network [OSTI]

    Redman, Aniko Maria

    2012-06-07T23:59:59.000Z

    -Bicyclo[2. 2. 1]hept-5-en-2, 3-diol (54), . trans-3-Methyl-3-cyclohexen-1, 6-diol (55) . . REFERENCES VITA Page 65 66 66 67 68 69 69 70 70 71 72 73 74 74 75 77 80 LIST OF TABLES TABLE I Reaction Conditions and Yields of the Oxidized... is the opposite of vinyl-9-BBN, which forms mainly the meta-substituted product. 15 Scheme 10 CHs 3 1. 144 h, 85 C 2. HzOz, NaOH 63% CHs OH + SiMes 88: 12 CHs , , SiMes OH Other dialkyl-vinylboranes, such as vinyl-3, 6-dimethylborepane...

  16. Highly Enantioselective Syntheses of Functionalized r-Methylene--butyrolactones via Rh(I)-catalyzed Intramolecular Alder Ene

    E-Print Network [OSTI]

    Zhang, Xumu

    the utility of our methodology, we introduced various functional groups at the allylic position (Table 3). If R2 is an acetyl group, the desired product is a vinyl acetate-substituted -lactone. If R2 is an alkyl group, a vinyl ether is the corresponding product. Due to the wide applications of vinyl acetates

  17. E-Print Network 3.0 - altitude podophyllum hexandrum Sample Search...

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

    Fritillaria cirrhosa in the Zhongdian Tibetan Autonomous County... analysis of alder coppice production. Alder grows in the high altitudes of the northern temperate belt Source:...

  18. The Relative Abundance of the Juvenile Phase of the Eastern Red-Spotted Newt at Harvard Forest Prior to the

    E-Print Network [OSTI]

    Wolfe, Patrick J.

    a great percentage of Eastern Hemlock's range via a number of dispersal agents including wind, birds, deer cause mortality in all age classes of Eastern Hemlock within 4­10 years of infestation (McClure 1991). In central Massachusetts, cold winter temperatures have slowed mortality of Eastern Hemlock in infested

  19. MECHANO-SORPTIVE DEFORMATION OF DOUGLAS-FIR SPECIMENS UNDER TANGENTIAL TENSILE STRESS

    E-Print Network [OSTI]

    observed in wooden beams (Armstrong and Kingston 1960; Armstrong and Christensen 196I). The magnitude conditions (Armstrong and Kingston 1962; Hearmon and Paton 1964). In particular, a reduction in MC causes deformation in bending and tension in- creasesmarkedly, even after allowanceis made for swelling (Armstrong

  20. Catalytic microwave torrefaction and pyrolysis of Douglas fir pellet to improve biofuel quality .

    E-Print Network [OSTI]

    [No author

    2012-01-01T23:59:59.000Z

    ??The aims of this dissertation were to understand the effects of torrefaction as pretreatment on biomass pyrolysis and catalytic pyrolysis for improving biofuel quality, and… (more)

  1. Adaptive FIR Filtering of Range Sidelobes for Air and Spaceborne Rain Mapping Stephen P. Lohmeier

    E-Print Network [OSTI]

    Kansas, University of

    . In this regard, radar appears to be more attractive for measuring rainfall rate from space. Further, one-modulated radar in a low PRF, low duty-cycle mode. To achieve the required power level either a microwave tubeB [1] sidelobe levels. Although others have used wavelets to achieve suppression [2]. To measure light

  2. ADAPTIVE FLUT FI.R SUPPRES; II.)N J. B. Moore

    E-Print Network [OSTI]

    Moore, John Barratt

    of weight reduction and flight env+>lope expansion. However, the model lng of th~ aircraft structural dynamics Is oniy approximate. The uncertainty in the model increases with increasing frequency. Ibis l using some form ,! plant Identification scheme can alleviate sc!!T,eof the difficulties. It will change

  3. Original article The physiological status of Douglas fir seedlings and the

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    November to December/January. Following cold storage until June, field performance was acceptable quality / plant handling / cold hardiness / mitotic index / cold storage / Pseudotsuga meuziesii Résumé

  4. Reliability models for finger joint strength and stiffness properties in Douglas-fir visual laminating grades

    E-Print Network [OSTI]

    Burk, Allan Gerard

    1988-01-01T23:59:59.000Z

    combination of formaldehyde, phenol, resorcinol, melamine, or urea. Two of the most common are melamine-urea resins and phenol-resorcinol resins. Melamine-urea resins are colorless liquids and are prepared by mixing powdered resins at a 60:40 melamine... . This curing is usually accomplished with r adiofr equency (RF ) heating. Phenol-resorcinol resins are dark reddish liquids and are prepared by adding powdered hardeners such as formaldehyde. They are popular in the laminating industry because they can...

  5. Guiding Douglas-fir Seed Selection in Europe Under Changing Climates

    E-Print Network [OSTI]

    Hamann, Andreas

    Germany S. Germany Italy Central Europe Coastal Balkans Balkans Romania Turkey Planting Sites Spain 300 20(°C) 0.0001 0.001 0.1 1 Random forest class probability Turkey Romania Balkans Coastal Balkans Central Southern UK Scotland Norway Finland Turkey Romania Balkans Coastal Balkans Central Europe Poland Eastern

  6. Researchers Borrow From Fir Tree to Create Biodiesel | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy UsageAUDITVehicles »ExchangeDepartment ofManagementManagementReduce

  7. Purpose: To focus a select group of upper-level undergraduate students and firs

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromising Science for1 2011 Publications Wood, V.,

  8. Overstory/understory relationships in old growth Grand fir habitat types of northeast Oregon

    E-Print Network [OSTI]

    Schreder, Peter Todd

    2012-06-07T23:59:59.000Z

    /understory relationships existing on northeast Oregon industrial forests. Greater understanding of the impact of silvicultural practices on forest fauna is needed. Information is also needed on how to acquire data to develop ecologically-based multi-resource management...

  9. Retro Diels-Alder Reactions of 5,6-Disubstituted-7-oxabicyclo[2.2.1]hept-2-enes: Experimental and

    E-Print Network [OSTI]

    Kaszynski, Piotr

    , the * Author for correspondence: Phone/fax: 615-898-2071/5182. Department of Chemistry, Middle Tennessee State

  10. Phenylseleno Acrylate As A Novel Ethylene Equivalent for Diels-Alder Reactions And An ortho-Benzoquinone Cycloaddition Strategy Toward Morphine

    E-Print Network [OSTI]

    Perez, Felix Rene

    2013-01-01T23:59:59.000Z

    developed a one pot, catalytic process from acrolein (25).13 The less reactive acrolein 25 was activated by boronthe activating auxiliary. Acrolein was the most successful

  11. Nickel-catalyzed Suzuki-Miyaura reactions of unactivated halides with alkyl boranes and planar-chiral borabenzene catalysts for Diels-Alder reactions

    E-Print Network [OSTI]

    Lu, Zhe

    2010-01-01T23:59:59.000Z

    Part I describes the expansion in scope of a nickel-catalyzed coupling reaction of unactivated alkyl bromides and alkyl boranes to include unactivated alkyl chlorides. The new method is adapted for use outside of a glove ...

  12. Aspects of the Biology and the Effects of Traditional and Non-Traditional Insecticides on Citrus Thrips and Avocado Thrips with the Objective of Improving Integrated Pest Management

    E-Print Network [OSTI]

    Zahn, Deane K.

    2011-01-01T23:59:59.000Z

    laurel, cotton, date, fir, Lucerne and various grasses,laurel, cotton, date, fir, lucerne and various grasses,

  13. Estimation of population structure in coastal Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco var. menziesii] using allozyme and microsatellite markers

    E-Print Network [OSTI]

    Krutovsky, Konstantin V.; St. Clair, John Bradley; Saich, Robert; Hipkins, Valerie D.; Neale, David B.

    2009-01-01T23:59:59.000Z

    al. 2001; Yu et al. 2006; Camus-Kulandaivelua et al. 2007).of 375 maize inbred lines (Camus-Kulandaivelu et al. 2006).Bot Gaz 136:290–298 Camus-Kulandaivelu L, Veyrieras J-B,

  14. IEE Electronics Letters, vol. 34, no. 19, pp. 18171819, 1998. A Lowpower Coefficient Segmentation Algorithm for FIR Filter Implementation

    E-Print Network [OSTI]

    Arslan, Tughrul

    ordering [1], choice of appropriate coding techniques [2,3], and the application of high level be generalised to filters with multipliers using other data representations such as sign magnitude etc. Fig.1 A flow chart of the algorithm Implementation: The flow chart in Figure 1 illustrates the main stages

  15. BLAST OBSERVATIONS OF RESOLVED GALAXIES: TEMPERATURE PROFILES AND THE EFFECT OF ACTIVE GALACTIC NUCLEI ON FIR TO SUBMILLIMETER EMISSION

    SciTech Connect (OSTI)

    Wiebe, Donald V.; Chapin, Edward L.; Halpern, Mark; Marsden, Gaelen [Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1 (Canada); Ade, Peter A. R.; Griffin, Matthew; Hargrave, Peter C.; Mauskopf, Philip; Pascale, Enzo [School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff, CF24 3AA (United Kingdom); Bock, James J. [Jet Propulsion Laboratory, Pasadena, CA 91109-8099 (United States); Devlin, Mark J.; Dicker, Simon; Klein, Jeff; Rex, Marie [Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104 (United States); Gundersen, Joshua O. [Department of Physics, University of Miami, 1320 Campo Sano Drive, Coral Gables, FL 33146 (United States); Hughes, David H. [Instituto Nacional de AstrofIsica Optica y Electronica, Aptdo. Postal 51 y 216, 72000 Puebla (Mexico); Martin, Peter G. [Canadian Institute for Theoretical Astrophysics, University of Toronto, 60 St. George Street, Toronto, ON M5S 3H8 (Canada); Netterfield, Calvin B. [Department of Physics, University of Toronto, 60 St. George Street, Toronto, ON M5S 1A7 (Canada); Olmi, Luca [Istituto di Radioastronomia, Largo E. Fermi 5, I-50125, Firenze (Italy); Patanchon, Guillaume [Laboratoire APC, 10, rue Alice Domon et Leonie Duquet 75205 Paris (France)

    2009-12-20T23:59:59.000Z

    Over the course of two flights, the Balloon-borne Large Aperture Submillimeter Telescope (BLAST) made resolved maps of seven nearby (<25 Mpc) galaxies at 250, 350, and 500 mum. During its 2005 June flight from Sweden, BLAST observed a single nearby galaxy, NGC 4565. During the 2006 December flight from Antarctica, BLAST observed the nearby galaxies NGC 1097, NGC 1291, NGC 1365, NGC 1512, NGC 1566, and NGC 1808. We fit physical dust models to a combination of BLAST observations and other available data for the galaxies observed by Spitzer. We fit a modified blackbody to the remaining galaxies to obtain total dust mass and mean dust temperature. For the four galaxies with Spitzer data, we also produce maps and radial profiles of dust column density and temperature. We measure the fraction of BLAST detected flux originating from the central cores of these galaxies and use this to calculate a 'core fraction', an upper limit on the 'active galactic nucleus fraction' of these galaxies. We also find our resolved observations of these galaxies give a dust mass estimate 5-19 times larger than an unresolved observation would predict. Finally, we are able to use these data to derive a value for the dust mass absorption coefficient of kappa = 0.29 +- 0.03 m{sup 2} kg{sup -1} at 250 mum. This study is an introduction to future higher-resolution and higher-sensitivity studies to be conducted by Herschel and SCUBA-2.

  16. International Journal of Infrared and Millimeter Waves, VoL 8, No. 6, 1987 NEW FIR LASER LINES AND FREQUENCY

    E-Print Network [OSTI]

    Cohen, Ronald C.

    by Dyubko et al. (5) who found 70 cw transitions ranging from 180 to 1300 ~m. Subsequently, Danielewicz

  17. Snapping Supernovae at z>1.7

    E-Print Network [OSTI]

    Aldering, Greg

    2009-01-01T23:59:59.000Z

    LBNL-61879 Snapping Supernovae at z > 1.7 Greg Aldering,of California. Snapping Supernovae at z > 1.7 Greg Aldering,of very high redshift Type Ia supernovae for cosmology and

  18. Finding Structure via Compression Jason L. Hutchens

    E-Print Network [OSTI]

    Structurevia Compression Jason L. Hutchens and Michael D. Alder (1998) Finding Structure via Compression. In D.M.W

  19. 2013NatureAmerica,Inc.Allrightsreserved. 1620 | VOL.8 NO.8 | 2013 | nature protocols

    E-Print Network [OSTI]

    function, and trans-cyclooctene and tetrazine reagents for Diels-Alder are not as synthetically accessible

  20. DataONE currently holds a collection of over 125,000 metadata records linked to data sets in 10 environmental and earth science data reposito-

    E-Print Network [OSTI]

    California at Santa Barbara, University of

    analysis cover set analysis cover set forest hemlock species forest hemlock species m biomass cm m biomass discoverable through DataONE.org a t c a l i f o r n i a drinking assessment supply drinking assessment supply nitrogen co2 nitrogen co2 biomass primary biomass primary soil n organic soil n organic river marsh island

  1. The Nearby Supernova FactoryThe Nearby Supernova Factory W.M. Wood-Vasey, G. Aldering, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Quimby, J. Siegrist, L. Wang Lawrence Berkeley National Lab

    E-Print Network [OSTI]

    .4 0.45 0.5 SupernovaeDiscovered/year/0.02 MagnitudeError Redshift Redshift distribution for Various

  2. Final Report fir DE-SC0005507 (A1618): The Development of an Improved Cloud Microphysical Product for Model and Remote Sensing Evaluation using RACORO Observations

    SciTech Connect (OSTI)

    McFarquhar, Greg M.

    2012-09-21T23:59:59.000Z

    We proposed to analyze data collected during the Routine Aerial Facilities (AAF) Clouds with Low Optical Water Depths (CLOWD) Optical Radiative Observations (RACORO) in order to develop an integrated product of cloud microphysical properties (number concentration of drops in different size bins, total liquid drop concentration integrated over all bin sizes, liquid water content LWC, extinction of liquid clouds, effective radius of water drops, and radar reflectivity factor) that could be used to evaluate large-eddy simulations (LES), general circulation models (GCMs) and ground-based remote sensing retrievals, and to develop cloud parameterizations with the end goal of improving the modeling of cloud processes and properties and their impact on atmospheric radiation. We have completed the development of this microphysical database. we investigated the differences in the size distributions measured by the Cloud and Aerosol Spectrometer (CAS) and the Forward Scattering Probe (FSSP), between the one dimensional cloud imaging probe (1DC) and the two-dimensional cloud imaging probe (2DC), and between the bulk LWCs measured by the Gerber probe against those derived from the size resolved probes.

  3. UV-TO-FIR ANALYSIS OF SPITZER/IRAC SOURCES IN THE EXTENDED GROTH STRIP. II. PHOTOMETRIC REDSHIFTS, STELLAR MASSES, AND STAR FORMATION RATES

    SciTech Connect (OSTI)

    Barro, G.; Perez-Gonzalez, P. G.; Gallego, J.; Villar, V.; Zamorano, J. [Departamento de Astrofisica, Facultad de CC. Fisicas, Universidad Complutense de Madrid, E-28040 Madrid (Spain); Ashby, M. L. N. [Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138 (United States); Kajisawa, M.; Yamada, T. [Astronomical Institute, Tohoku University, Aramaki, Aoba, Sendai 9808578 (Japan); Miyazaki, S. [National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588 (Japan)

    2011-04-01T23:59:59.000Z

    Based on the ultraviolet to far-infrared photometry already compiled and presented in a companion paper (Paper I), we present a detailed spectral energy distribution (SED) analysis of nearly 80,000 IRAC 3.6 + 4.5 {mu}m selected galaxies in the Extended Groth Strip. We estimate photometric redshifts, stellar masses, and star formation rates (SFRs) separately for each galaxy in this large sample. The catalog includes 76,936 sources with [3.6] {<=} 23.75 (85% completeness level of the IRAC survey) over 0.48 deg{sup 2}. The typical photometric redshift accuracy is {Delta}z/(1 + z) = 0.034, with a catastrophic outlier fraction of just 2%. We quantify the systematics introduced by the use of different stellar population synthesis libraries and initial mass functions in the calculation of stellar masses. We find systematic offsets ranging from 0.1 to 0.4 dex, with a typical scatter of 0.3 dex. We also provide UV- and IR-based SFRs for all sample galaxies, based on several sets of dust emission templates and SFR indicators. We evaluate the systematic differences and goodness of the different SFR estimations using the deep FIDEL 70 {mu}m data available in the Extended Groth Strip. Typical random uncertainties of the IR-bases SFRs are a factor of two, with non-negligible systematic effects at z {approx}> 1.5 observed when only MIPS 24 {mu}m data are available. All data products (SEDs, postage stamps from imaging data, and different estimations of the photometric redshifts, stellar masses, and SFRs of each galaxy) described in this and the companion paper are publicly available, and they can be accessed through our the Web interface utility Rainbow-navigator.

  4. EUROPHYSICS LETTERS Europhys. Lett., 25 (3), pp. 231-236 (1994)

    E-Print Network [OSTI]

    Andelman, David

    1994-01-01T23:59:59.000Z

    Awiv University, Ramat Awiv, Tel Awiv 69978, Israel (**) Institut fir Theoretische' Physik, WE2, Freie

  5. Diagnostic experiments and modeling of the 118 03BCm CH3OH laser (*) J.-M. Lourtioz and R. Adde

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    significant FIR saturation (see section 3). Therefore we have followed the fruitful approach of Danielewicz

  6. Exploring Dark Energy with SNAP

    E-Print Network [OSTI]

    Aldering, G.

    2009-01-01T23:59:59.000Z

    weak lensing survey. The planned dark energy program forthe Joint Dark Energy Mission (JDEM) will produce a treasureLBNL- 58276 Exploring Dark Energy with SNAP G. Aldering

  7. E-Print Network 3.0 - acyclic diols triols Sample Search Results

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

    of cyclophane molecular sensors... -Diels-Alder reaction of electron deficient tetrazine 48 with benzene cis-diol to produce dihydrodiol containing the 1... -shift Scheme...

  8. E-Print Network 3.0 - agricultural liming techniques Sample Search...

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

    beech and sycamore, adventitious shoots... which are especially suitable for use in coppice woodland including ash, oak, chestnut, willow, lime... when well rooted. Alder, ash,...

  9. [4+2] cycloadditions of iminoacetonitriles : a general strategy for the synthesis of quinolizidines, indolizidines, and piperidines

    E-Print Network [OSTI]

    Maloney, Kevin M. (Kevin Matthew)

    2007-01-01T23:59:59.000Z

    Iminoacetonitriles participate as reactive dienophiles in intermolecular and intramolecular Diels-Alder cycloadditions leading to quinolizidines, indolizidines, and piperidines. The resultant a-amino nitrile cycloadducts ...

  10. The influence of distance to refuge on flight initiation distance in the gray squirrel (Sciurus carolinensis)

    E-Print Network [OSTI]

    Dill, Lawrence M.

    , with Douglas-fir (Pseudotsuga menziezii) the dominant species. The ground surface was packed soil, fine gravel

  11. E-Print Network 3.0 - aurifrons shuckard hymenoptera Sample Search...

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

    for Cirrospilus vittatus (Hymenoptera: Eulophidae... eggs of Neodiprion abietis Harris (Hymenoptera: Diprionidae) on balsam fir, Abies balsamea (L.) Mill... vittatus...

  12. Supplement Analysis for the Transmission System Vegetation Management Program FEIS (DOE/EIS-0285/SA-15)

    SciTech Connect (OSTI)

    N /A

    2001-06-19T23:59:59.000Z

    BPA proposes to clear unwanted vegetation in the rights-of-ways and around tower structures that may impede the operation and maintenance of the subject transmission lines. Work also includes clearing of a small (<1/4 mile) section of access road. All work will be in accordance with the National Electrical Safety Code and BPA standards. See Section 1.1 of the attached checklist for detailed information on each section of the referenced transmission lines. BPA will conduct the vegetation control with the goal of removing tall-growing vegetation that is currently or will soon be a hazard to the transmission lines and where possible to promote low-growing plant communities in the right-of-way. This project meets the standards and guidelines for the Transmission System Vegetation Management Program Final Environmental Impact Statement (FEIS) and Record of Decision (ROD). The vegetation needing control is mainly Douglas Fir, Alder, and blackberries as indicated in Section 1.2 of the attached checklist. The work involved in the ROW includes: clearing tall growing vegetation that is currently or will soon pose a hazard to the lines; treating the associated stumps and re-sprouts with herbicide to ensure that the roots are killed preventing new sprouts; and selectively eliminating tall growing vegetation before it reaches a height or density to begin competing with low-growing vegetation. All work will take place in existing rights-of-ways and around transmission structures. All work will be accomplished by selective vegetation control methods to assure that there is little potential harm to non-target vegetation and to low-growing plants. The work will provide system reliability and fire protection. Also, all off right-of-way trees that are potentially unstable and will fall within a minimum distance or into the zone where the conductors swing will be removed. Access roads will be treated using mowing and herbicide applications. The work will provide system reliability. The subject transmission lines range from 115kV to 230kV and are made up of accompanying access roads, steel and wooden transmission line structures and associated switching platforms. The minimum clearance ranges from 21 feet for 115kV lines to 23 feet for 230kV lines. ROW easement widths vary along the length of the project. Vegetation control for this project is designed to provide a 3 year maintenance free interval. In summary, the overall vegetation management scheme will be to selectively remove tall growing vegetation then apply selective herbicide treatment using cut stump applications.

  13. The effects of in vitro and greenhouse irradiance, fertility, and media on the growth of a hybrid Phalaenopsis orchid

    E-Print Network [OSTI]

    Konow, Elise Ann

    1998-01-01T23:59:59.000Z

    , 2ON-8.6-P-16.6K], DynaGro, and Wilder's, was applied to Phalaenopsis Atien Kaala 'TSC 22' plants grown in either fir bark alone or 70% fir bark and 3 0% Canadian sphagnum peat (bark/peat). Plants grown in the fir bark medium with 2ON-2.2P-I 5.8K...

  14. Spatial variability of throughfall water and chemistry and forest floor water content in a Douglas fir forest stand Hydrology and Earth System Sciences, 6(3), 363374 (2002) EGS

    E-Print Network [OSTI]

    Boyer, Edmond

    of Environmental Sciences, Energy Research and Process Innovation (TNO-MEP), P.O. Box 342, NL-7300 AH Apeldoorn a field plot. Such studies have not been designed to sample the spatial heterogeneity that normally exists overlook a rich abundance of information found at a higher resolution. For example, individual plants may

  15. hf. J. Hcut Mau lian~fir. Vol 31, No. I, pp. 3546. 1988 0017-9310/88$3.00+0.00 Prmtcd in Great Br~tam :r` 1988 Pergamon Journals Ltd

    E-Print Network [OSTI]

    Beckermann, Christoph

    . BECKERMANN and R. VISKANTA Heat Transfer Laboratory, School of Mechanical Engineering, Purdue University the freezing and melting of soils [l], artificial freezing of ground for mining and construction purposes [2], thermal energy storage [3], freezing of soil around the heat exchanger coils of a ground based heat pump

  16. Cyclobutadiene–C[subscript 60] Adducts: N-Type Materials for Organic Photovoltaic Cells with High V[subscript OC

    E-Print Network [OSTI]

    Han, Ggoch Ddeul

    New tetraalkylcyclobutadiene–C[subscript 60] adducts are developed via Diels–Alder cycloaddition of C[subscript 60] with in situ generated cyclobutadienes. The cofacial ?-orbital interactions between the fullerene orbitals ...

  17. Microsoft Word - 2014-04-21_CustomersProductsList

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

    1. Albion, City of Load Following 2. Alder Mutual Light Company Load Following 3. Ashland, City of Load Following 4. Asotin County PUD No. 1 Load Following 5. Bandon, City of...

  18. E-Print Network 3.0 - andrew stepanov ilja Sample Search Results

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

    Science 66 DielsAlder reactions between maleic anhydride and furan derivatives in supercritical CO2 Summary: . Cott,a Kirk J. Ziegler,a Vincent P. Owens,a Jeremy D. Glennon,a...

  19. Total Synthesis of (?)-Himandrine

    E-Print Network [OSTI]

    Movassaghi, Mohammad

    We describe the first total synthesis of (?)-himandrine, a member of the class II galbulimima alkaloids. Noteworthy features of this chemistry include a diastereoselective Diels?Alder reaction in the rapid synthesis of the ...

  20. The enantioselective total synthesis of (+)-Symbioimine

    E-Print Network [OSTI]

    Born, Stephen Christopher

    2009-01-01T23:59:59.000Z

    C 10 unit 45, a C 3 unit (acrolein), and tryptophan. The key3 H H NH 3 O N N H O O acrolein -H + N N Diels-Alder N N [

  1. E-Print Network 3.0 - alkyl dimethyl benzyl Sample Search Results

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

    acceptable, but models show that it Summary: -Alder reaction of dimethyl 1,2,4,5-tetrazine-3,6-dicarboxylateand a subsequent in- tramolecular Diels... : the inverse electron...

  2. New Hampshire Directory of Sawmills

    E-Print Network [OSTI]

    New Hampshire, University of

    . Soon after, New Hampshire's patriots joined in the American Revolution, not for tea but to protect Green Lumber, Cants/Timbers, Pallets/Crates, Sawdust Barton Lumber Co., Inc. (Sawmill Not Presently, Retail, Custom Sawing, Custom Planing Species: White Pine, Hemlock, Red Pine Products: Rough Green Lumber

  3. 2011 ISRP Retrospective Presented by

    E-Print Network [OSTI]

    but is there competition ­ hatchery vs wild? · Possible density dependent factors as stock size rebuilds. The ISRP sees Time Frames for Results How long will it take to measure the effects of habitat actions? #12;Some improvements will be almost immediate... Hemlock Dam before removal After removal #12;Some will take decades

  4. Texas Range Plants Poisonous to Livestock.

    E-Print Network [OSTI]

    Sperry, Omer Edison

    1955-01-01T23:59:59.000Z

    College Staiion, Texas CONTENTS Page Pap INTRODUCTION ........................... .------------------ , 3 PART 11. PLANTS LESS COMMONLY TOXIC TO LIVESTOCK THE PROBLEM --------.--------.----------.------------------ 3 Aloysia lycioides, Whitebrush... ------.-.-------... ... 35 ACKNOWLEDGMENTS 3 Amaranthzts spp., Careless weed ----------.-.... 3.5 PART 1. IPLAKTS MOST COMMONLY TOXIC TO LIVESTOCK A pocynum canna binum, Dogbane, Indian hemp 35 Cicuta curtissii. Water hemlock -_--------.-...... 36 Acacia berlandieri...

  5. E-Print Network 3.0 - aloe ferox leaf Sample Search Results

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

    Nepal Summary: ), Thasing (Tam), Silver fir (Eng) Tree Leaf Respiratory problems, cough. Decoction used for bronchitis... and cough. 2. Aconitum ferox Wall.ex Seringe...

  6. E-Print Network 3.0 - adiposo marrom tam Sample Search Results

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

    Nepal Summary: ), Thasing (Tam), Silver fir (Eng) Tree Leaf Respiratory problems, cough. Decoction used for bronchitis... and cough. 2. Aconitum ferox Wall.ex Seringe...

  7. E-Print Network 3.0 - acidic oily sludge-contaminated Sample...

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

    formation of two liquid phases (oily phase and an aqueous phase... predominates. Auger Pyrolysis of pre-treated Douglas Fir (set with diluted sulphuric acid) resulted in a...

  8. E-Print Network 3.0 - alkaline peroxide pretreated Sample Search...

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

    Grant Western Regional Center Summary: performed tests on Douglas fir and hybrid poplar biomass to identify the effect of pretreatment conditions... of alkaline elements and a...

  9. Sparsity Optimization in Design of Multidimensional Filter Networks

    E-Print Network [OSTI]

    2014-11-22T23:59:59.000Z

    A FIR filter is represented in the spatial domain by a limited-size kernel defined by a ...... Muthukrishnan S (2005) Data streams: algorithms and applications.

  10. E-Print Network 3.0 - aluminum triso-ethylphosphonate butylate...

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

    Resistance Advancements: Dr. Dragan CurcijaDr. Dragan Curcija Summary: -Expanded (EPS) Pine or Douglas Fir Frame Cavity Polyfoam tape Urethane Sealant Silicone...

  11. abies alba larix: Topics by E-print Network

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

    so podobne kot pri smreki (Picea abies Karst.). Jelovina ima prednost predvsem tam of Norway spruce (Picea abies Karst.). Fir is favoured where resin is not desired, where...

  12. abies abies alba: Topics by E-print Network

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

    so podobne kot pri smreki (Picea abies Karst.). Jelovina ima prednost predvsem tam of Norway spruce (Picea abies Karst.). Fir is favoured where resin is not desired, where...

  13. abies alba stands: Topics by E-print Network

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

    so podobne kot pri smreki (Picea abies Karst.). Jelovina ima prednost predvsem tam of Norway spruce (Picea abies Karst.). Fir is favoured where resin is not desired, where...

  14. abies alba mill: Topics by E-print Network

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

    so podobne kot pri smreki (Picea abies Karst.). Jelovina ima prednost predvsem tam of Norway spruce (Picea abies Karst.). Fir is favoured where resin is not desired, where...

  15. E-Print Network 3.0 - aurutab haiged mandlid Sample Search Results

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

    Summary: , Cayford and Haig 1961, Jokela and Lorenz 1959, Heidmann 1972, and Williston 1974). Although most field... - ferred to feed on pine (Pinus spp.) and fir (Abies...

  16. Copyright 2008, SEPM (Society for Sedimentary Geology) 0883-1351/08/0023-0421/$3.00 PALAIOS, 2008, v. 23, p. 421423

    E-Print Network [OSTI]

    Royer, Dana

    or C-S-R triangle (Grime, 1977). Importantly, the interrelation- ships among leaf economic traits fossil leaf eco- nomics. The fir

  17. Index des mots-cls Keywords index

    E-Print Network [OSTI]

    Boyer, Edmond

    , 445 circum-Mediterranean firs, 823 climate, 439 climate change, 823 climate gradient, 1 climatic maximal light driven electron flow, 163 mechanical property, 317 mechanical strength, 129 Mediterranean

  18. E-Print Network 3.0 - awgn communication channels Sample Search...

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

    Diego Collection: Engineering 9 Performance of a Parallel Acquisition Scheme for a Spread-Spectrum Packet Radio Communication Summary: loss probabilities fir the acquisition scheme...

  19. ENG EC516 Digital Signal Processing 2008-2009 Catalog Data

    E-Print Network [OSTI]

    and their properties in relation to application requirements such as real-time, low bandwidth, and low-power operation. Optimal FIR filter design; time-dependent Fourier transform and filterbanks; Hilbert transform relations this course, students should be able to design DSP solutions involving the following topics: 1. Optimal FIR

  20. Ann. For. Sci. 67 (2010) 805 Available online at: c INRA, EDP Sciences, 2010 www.afs-journal.org

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    2010-01-01T23:59:59.000Z

    to summer water shortage. In a central European context we define drought as a day or a sequence of days of days when the tree water demand exceeded the soil water supply was higher for Douglas-fir than-fir's high sensitivity to limited water supply. · Simulated climate change does not substantially alter

  1. Physica E 2 (1998) 3943 Full-spectrum optically detected resonance (ODR) spectroscopy

    E-Print Network [OSTI]

    Weinstein, Benard.A.

    , Bu alo, NY 14260, USA Abstract Resonant magneto-absorption of far-infrared (FIR) laser radiation that do not involve carrier heating. At high FIR laser intensities, carrier heating e ects dominate; Photoluminescence; Impurities Optically detected resonance (ODR) spectroscopy combines visible=near-infrared

  2. Near-infrared sideband generation induced by intense far-infrared radiation in GaAs quantum wells

    E-Print Network [OSTI]

    Kono, Junichiro

    Near-infrared sideband generation induced by intense far-infrared radiation in GaAs quantum wells J illuminated with near-infrared NIR radiation at frequency nir and intense far-infrared FIR radiation from and quenching of photoluminescence PL .8,9 The nonlinear interaction of FIR and near-infrared NIR radiation

  3. Original article Predicted global warming

    E-Print Network [OSTI]

    Boyer, Edmond

    Original article Predicted global warming and Douglas-fir chilling requirements DD McCreary1 DP to predicted global warming. Douglas-fir / chilling / global warming / bud burst / reforestation Résumé offer evidence that mean global warming of 3-4 °C could occur within the next century, particularly

  4. United States Department of

    E-Print Network [OSTI]

    Standiford, Richard B.

    programs for entering local weather data. Retrieval Terms: Douglas-fir, seed orchard, pest management, pest, for his encouragement, David L. Rowney for his programming assistance, and William A. Copper for preparing. The computer program described provides a Douglas-fir seed orchard manager (user) with a quantitative method

  5. High Spatial Resolution KAO Far-Infrared Observations of the Central Regions of Infrared-Bright Galaxies

    E-Print Network [OSTI]

    Beverly J. Smith; P. M. Harvey

    1996-05-06T23:59:59.000Z

    We present new high spatial resolution Kuiper Airborne Observatory 50 micron and/or 100 micron data for 11 infrared-bright galaxies. We also tabulate previously published KAO data for 11 other galaxies, along with the IRAS data for the bulges of M 31 and M 81. We find that L(FIR)/L(B) and L(FIR)/L(H) correlate with CO (1 - 0) intensity and tau(100). Galaxies with optical or near-infrared signatures of OB stars in their central regions have higher values of I(CO) and tau(100), as well as higher far-infrared surface brightnesses and L(FIR)/L(B) and L(FIR)/L(H) ratios. L(FIR)/L(H(alpha)) does not correlate strongly with CO and tau(100). These results support a scenario in which OB stars dominate dust heating in the more active galaxies and older stars are important in quiescent bulges.

  6. S3444D Syllabus Summer session 2011 S3444DOrganic Chemistry II Summer 2011

    E-Print Network [OSTI]

    Lin, Qiao

    S3444D Syllabus Summer session 2011 S3444D­Organic Chemistry II Summer 2011 Lecture: 209 Havemeyer, MTWR 10:45 am to 12:20 pm Text: Organic Chemistry, John McMurry, 7th Edition Instructor: Fay Ng (office Date Book chapter topic 7/5 14 Conjugated compounds and Diels-Alder reaction 7/6 15 Benzene

  7. ACADEMIC SENATE COMMITTEE April 5, 2010

    E-Print Network [OSTI]

    Capecchi, Mario R.

    , Stephen Lessnick, Edward M. Levine, Joelle Lien, Brad Lundahl, James Metherall, Joseph Metz, William C Torres, Margaret Wan, Donna White, Bryce Williams, Lindsay Williams, Seth Welborn, Braden York, Nick Floor, Kathryn Stockton, Martha Bradley, Stephen Alder, Sue Cantarini, Jeff Webb, Cathy Chambless

  8. Energy use by biological protein transport pathways

    E-Print Network [OSTI]

    Economou, Tassos

    residing within energy-conserving membranes use transmembrane ion gradients to drive substrate transport receptors impart specificity to a targeting route, and transport across or into the membrane is typicallyEnergy use by biological protein transport pathways Nathan N. Alder1 and Steven M. Theg2 1

  9. All UC Campuses -Astronomers and Researchers Campus/LAB Name Observational Obs/Theory/Physics Email Address

    E-Print Network [OSTI]

    /Theory/Physics Email Address LBNL Aldering, Greg Optical/IR Obs galdering@lbl.gov LBNL Bailey, Steve BOSS Obs StephenBailey@lbl.gov LBNL Bebek, Chris SNAP Inst CJBebek@lbl.gov LBNL Borrill, Julian CMB computational jdborrill@lbl.gov LBNL Cahn, Robert Theory RNCahn@lbl.gov LBNL Carithers, Bill SNAP Physics WCCarithers@lbl.gov LBNL Kim

  10. Professor Clive Brasier, Forest Research UK Scientific and operational flaws

    E-Print Network [OSTI]

    circinatum, recently reported from Spain, Italy; now spread to Portugal? .. Photos: Joan Webber Forest and mortality of cork oaks and holm oaks in Spain and Portugal. Origin: Pacific-Celebes area. Phytophthora cinnamomi root disease of Q. ilex, Spain Photo Forest Research UK #12;Phytophthora alni sp. nov. on alder

  11. Kinetic isotope effects, dynamic effects, and mechanistic studies of organic reactions

    E-Print Network [OSTI]

    Wang, Zhihong

    2007-04-25T23:59:59.000Z

    Â?-conjugating substituent is distal to the oxazolidinone but decreased steric interaction when the ÏÂ?-conjugating substituent is proximal to the oxazolidinone. Dynamic effects were studied in Diels-Alder reaction between acrolein and methyl vinyl ketone. This reaction...

  12. EN-019 Silviculture March 2003 Effects of Phosphorus Fertilization on the

    E-Print Network [OSTI]

    Plantations By Kevin R. Brown, Ph.D., R.P. Bio. and Paul J. Courtin, M.F., R.P.F. KEYWORDS: red alder Bong.) is the most widespread hardwood tree species in low- elevation forests of coastal British Colum seedlings were fertilized with P (but not other elements) within a year of planting, tree volumes in

  13. Multicomponent Reactions in Total Synthesis Kevin Allan

    E-Print Network [OSTI]

    Stoltz, Brian M.

    · Ugi Reaction · Cycloadditions · Povarov Reaction · Knoevenagel / Hetero-Diels-Alder Cycloaddition · 1-VCH; Weinheim, 2005. Orru, R. V. A.; de Greef, M. Synthesis 2003, 10, 1471-1499. Ugi, I. Pure Appl. Chem. 2001, 73, 187-191. Bienaymé, H.; Hulme, C.; Oddon, G.; Schmitt, P. Chem. Eur. J. 2000, 6, 3321-3329. Ugi, I

  14. Template for SYNLETT and SYNTHESIS Thieme Stuttgart New York 2009-04-27 page 1 of 5 Abstract: The synthesis of the first vinyltetrazine derivative is

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Abstract: The synthesis of the first vinyltetrazine derivative is described. 3,6-Divinyl-1,2,4,5-tetrazine on high-nitrogen polymers, it appeared that tetrazine-containing polymers had been largely unexplored,4 although tetrazines are known for their ability to react in inverse demand Diels- Alder reactions,5

  15. Appendix List for Upper Middle Mainstem Columbia River Appendix A. WNHP. 2003.Known High Quality or Rare Plant Communities and

    E-Print Network [OSTI]

    and wetland ecosystems of the UMM Subbasin, WA. SCIENTIFIC NAME COMMON NAME Abies amabilis - Tsuga mertensiana shrubland (provisional) Sitka alder #12;SCIENTIFIC NAME COMMON NAME Artemisia arbuscula / Festuca idahoensis dwarf-shrub herbaceous vegetation Low sagebrush /Idaho fescue Artemisia rigida / Poa secunda dwarf

  16. A POPULATION OF DUST-RICH QUASARS AT z {approx} 1.5

    SciTech Connect (OSTI)

    Dai, Y. Sophia; Elvis, Martin; Huang Jiasheng; Fazio, Giovanni; Trichas, Markos [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Bergeron, Jacqueline; Omont, Alain [Institut d'Astrophysique de Paris, UMR7095, 98bis boulevard Arago, F-75014 Paris (France); Bock, Jamie; Vieira, Joaquin D. [California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125 (United States); Cooray, Asantha [Department of Physics and Astronomy, University of California, Irvine, CA 92697-4575 (United States); Hatziminaoglou, Evanthia [ESO, Karl-Schwarzschild-Str. 2, 85748 Garching bei Muenchen (Germany); Ibar, Edo [UK Astronomy Technology Centre, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom); Magdis, Georgios E.; Rigopoulou, Dimitra [Department of Astrophysics, Oxford University, Keble Road, Oxford OX1 3RH (United Kingdom); Oliver, Seb J. [Astronomy Centre, Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH (United Kingdom); Page, Mathew J.; Symeonidis, Myrto [Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT (United Kingdom); Perez-Fournon, Ismael [Instituto de Astrofisica de Canarias (IAC), E-38200 La Laguna, Tenerife (Spain); Roseboom, Isaac G. [Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom); Scott, Douglas, E-mail: ydai@cfa.harvard.edu [Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1 (Canada); and others

    2012-07-01T23:59:59.000Z

    We report Herschel SPIRE (250, 350, and 500 {mu}m) detections of 32 quasars with redshifts 0.5 {<=}z < 3.6 from the Herschel Multi-tiered Extragalactic Survey (HerMES). These sources are from a MIPS 24 {mu}m flux-limited sample of 326 quasars in the Lockman Hole Field. The extensive multi-wavelength data available in the field permit construction of the rest-frame spectral energy distributions (SEDs) from ultraviolet to the mid-infrared for all sources, and to the far-infrared (FIR) for the 32 objects. Most quasars with Herschel FIR detections show dust temperatures in the range of 25-60 K, with a mean of 34 K. The FIR luminosities range from 10{sup 11.3} to 10{sup 13.5} L{sub Sun }, qualifying most of their hosts as ultra- or hyper-luminous infrared galaxies. These FIR-detected quasars may represent a dust-rich population, but with lower redshifts and fainter luminosities than quasars observed at {approx}1 mm. However, their FIR properties cannot be predicted from shorter wavelengths (0.3-20 {mu}m, rest frame), and the bolometric luminosities derived using the 5100 A index may be underestimated for these FIR-detected quasars. Regardless of redshift, we observed a decline in the relative strength of FIR luminosities for quasars with higher near-infrared luminosities.

  17. analog signal transfer: Topics by E-print Network

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

    40-48, Jan. 1994. 8 C. D. Mc from the ECG by an efficient FIR filter with reduced number of taps," IEEE Trans. Biomed. Eng., volIEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--II:...

  18. Clearwater Subbasin Assessment 116 November 2003 5 Vegetative Resources

    E-Print Network [OSTI]

    montane slopes where precipitation patterns allow the formation of grand fir forests, or along river habitats available. Wetlands occur as small ponds filled by spring runoff, wet meadows, springs and seeps

  19. 190 Frederic Y. M. Wan and Keith Anderson 1. Introduction

    E-Print Network [OSTI]

    Wan, Frederic Yui-Ming

    and to the forest industry, albeit for different reasons. Private logging companies are keenly interested Columbia Douglas fir was worth $1000 (after harvesting cost) for timber production in 1967, while a 30-year

  20. adaptive equalization algorithm: Topics by E-print Network

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

    Equalizers can be used to remove this ISI and recover the transmitted information. Fast (FBE) to remove ISI. Such a DFE requires many FIR taps for long cable lengths, increasing...

  1. adaptive iir notch: Topics by E-print Network

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

    Equalizers can be used to remove this ISI and recover the transmitted information. Fast (FBE) to remove ISI. Such a DFE requires many FIR taps for long cable lengths, increasing...

  2. The Astrophysical Journal, 751:144 (16pp), 2012 June 1 doi:10.1088/0004-637X/751/2/144 C 2012. The American Astronomical Society. All rights reserved. Printed in the U.S.A.

    E-Print Network [OSTI]

    Draine, Bruce T.

    of Western Australia, 35 Stirling Hwy, Crawley, WA 6009, Australia Received 2011 November 28; accepted 2012 energy distribution (SED) modeling indicates that at most 25% of the FIR power in the ring and Enuc

  3. Cosmology with Cosmic Infrared Background

    E-Print Network [OSTI]

    Leka, K. D .

    2006 #12;Title Here IR/Opt: Direct emission from stars FIR: Processed emission of Opt/IR light by dust IRAC Instrument Team's GTO Survey PI: Peter Eisenhardt (JPL) + ~20 collaborators IRAC Spitzer Bootes

  4. Updated 9/18/13 Jeremy Scott Johnson

    E-Print Network [OSTI]

    of genomics on ecological biogeography. Progress in Physical Geography Maps: "Figure 1. Our water project area genetics and genomics into ecological biogeography: A case study using Douglas Fir (Pseudotsuga menziesii

  5. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--II: ANALOG AND DIGITAL SIGNAL PROCESSING, VOL. 46, NO. 8, AUGUST 1999 1035 An Improved Weighted Least-Squares Design

    E-Print Network [OSTI]

    Lu, Wu-Sheng

    , AUGUST 1999 1035 An Improved Weighted Least-Squares Design for Variable Fractional Delay FIR Filters Wu, University of Victoria, Victoria, BC, Canada V8W 3P6. T.-B. Deng is with the Department of Information

  6. A COMPARISON OF FAR-IR AND H I AS REDDENING PREDICTORS AT HIGH GALACTIC LATITUDE

    SciTech Connect (OSTI)

    Peek, J. E. G., E-mail: jegpeek@gmail.com [Department of Astronomy, Columbia University, New York, NY 10027 (United States)

    2013-03-20T23:59:59.000Z

    Both the Galactic 21 cm line flux from neutral hydrogen (H I) in interstellar medium and the far-infrared (FIR) emission from Galactic dust grains have been used to estimate the strength of Galactic reddening of distant sources. In this work we use a collection of uniform color distant galaxies as color standards to determine whether the H I method or the FIR method is superior. We find that the two methods both produce reasonably accurate maps, but that both show significant errors as compared to the typical color of the background galaxies. We find that a mixture of the FIR and H I maps in roughly a 2-to-1 ratio is clearly superior to either map alone. We recommend that future reddening maps should use both sets of data, and that well-constructed FIR and H I maps should both be vigorously pursued.

  7. The Star Formation Rate Function of the Local Universe

    E-Print Network [OSTI]

    D. Christopher Martin; Mark Seibert; Veronique Buat; Jorge Inglesias-Paramo; Tom A. Barlow; Luciana Bianchi; Yong-Ik Byun; Jose Donas; Karl Forster; Peter G. Friedman; Timothy M. Heckman; Patrick N. Jelinsky; Young-Wook Lee; Barry F. Madore; Roger F. Malina; Bruno Milliard; Patrick F. Morrissey; Susan G. Neff; R. Michael Rich; David Schiminovich; Oswald H. W. Siegmund; Todd Small; Alex S. Szalay; Barry Y. Welsh; Ted K. Wyder

    2004-11-11T23:59:59.000Z

    We have derived the bivariate luminosity function for the far ultraviolet (1530Angstroms) and far infrared (60 microns). We used matched GALEX and IRAS data, and redshifts from NED and PSC-z. We have derived a total star formation luminosity function phi(L_{tot}), with L_{tot} = L_{FUV}+L_{FIR}. Using these, we determined the cosmic ``star formation rate'' function and density for the local universe. The total SFR function is fit very well by a log-normal distribution over five decades of luminosity. We find that the bivariate luminosity function phi(L_{FUV},L_{FIR}) shows a bimodal behavior, with L_{FIR} tracking L_{FUV} for L_{TOT}< 10^10 L_sun, and L_{FUV} saturating at 10^10 L_sun, while L_{TOT} L_{FIR} for higher luminosities. We also calculate the SFR density and compare it to other measurements.

  8. From channel modeling to signal processing for Bit patterned media recording

    E-Print Network [OSTI]

    Karakulak, Seyhan

    2010-01-01T23:59:59.000Z

    with FIR f (D) and with a 1-D target g(D) for BPM recordingof timing window for BPM recording. . . . . . . . Figure 3.1for bit-patterned me- dia (BPM) recording channels. The

  9. PACIFIC SOUTHWEST FOREST SERVICE

    E-Print Network [OSTI]

    Standiford, Richard B.

    Station, for technical assistance; the Station s biometrics branch for assistance with computer programs, BERKELEY, CALIFORNIA 94701 Experiment Station WEATHER, LOGGING, and TREE GROWTH associated with FIR . . . . . . . . . . . . . . . . . . . . . . . . . . Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Weather

  10. Journal of Applied Ecology 2009, 46, 511515 doi: 10.1111/j.1365-2664.2009.01641.x 2009 The Author. Journal compilation 2009 British Ecological Society

    E-Print Network [OSTI]

    He, Fangliang

    . Keywords: Baiji, Beshanzu fir, biodiversity conservation, China, economic growth, environmental protection The Author. Journal compilation © 2009 British Ecological Society Blackwell Publishing Ltd FORUM Priceof prosperity:economicdevelopmentandbiological conservation in China ( ) Fangliang He Department of Renewable

  11. EXPLAINING THE [C II]157.7 {mu}m DEFICIT IN LUMINOUS INFRARED GALAXIES-FIRST RESULTS FROM A HERSCHEL/PACS STUDY OF THE GOALS SAMPLE

    SciTech Connect (OSTI)

    Diaz-Santos, T.; Armus, L.; Howell, J. H.; Surace, J. A. [Spitzer Science Center, California Institute of Technology, MS 220-6, Pasadena, CA 91125 (United States); Charmandaris, V. [IESL/Foundation for Research and Technology-Hellas, GR-71110, Heraklion (Greece); Stierwalt, S.; Evans, A. S.; Mazzarella, J. M. [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904 (United States); Murphy, E. J. [Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101 (United States); Haan, S. [CSIRO Astronomy and Space Science, Marsfield NSW 2122 (Australia); Inami, H. [National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, AZ 85719 (United States); Malhotra, S. [School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287 (United States); Meijerink, R. [Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, NL-9700 AV Groningen (Netherlands); Stacey, G. [Department of Astronomy, Cornell University, Ithaca, NY 14853 (United States); Petric, A. O.; Lu, N. [Astronomy Department, California Institute of Technology, Pasadena, CA 91125 (United States); Veilleux, S. [Joint Space-Science Institute, University of Maryland, College Park, MD 20742 (United States); Van der Werf, P. P. [Leiden Observatory, Leiden University, P.O. Box 9513, NL-2300 RA Leiden (Netherlands); Lord, S.; Appleton, P., E-mail: tanio@ipac.caltech.edu [NASA Herschel Science Center, IPAC, California Institute of Technology, MS 100-22, Cech, Pasadena, CA 91125 (United States); and others

    2013-09-01T23:59:59.000Z

    We present the first results of a survey of the [C II]157.7 {mu}m emission line in 241 luminous infrared galaxies (LIRGs) comprising the Great Observatories All-sky LIRG Survey (GOALS) sample, obtained with the PACS instrument on board the Herschel Space Observatory. The [C II] luminosities, L{sub [C{sub II]}}, of the LIRGs in GOALS range from {approx}10{sup 7} to 2 Multiplication-Sign 10{sup 9} L{sub Sun }. We find that LIRGs show a tight correlation of [C II]/FIR with far-IR (FIR) flux density ratios, with a strong negative trend spanning from {approx}10{sup -2} to 10{sup -4}, as the average temperature of dust increases. We find correlations between the [C II]/FIR ratio and the strength of the 9.7 {mu}m silicate absorption feature as well as with the luminosity surface density of the mid-IR emitting region ({Sigma}{sub MIR}), suggesting that warmer, more compact starbursts have substantially smaller [C II]/FIR ratios. Pure star-forming LIRGs have a mean [C II]/FIR {approx} 4 Multiplication-Sign 10{sup -3}, while galaxies with low polycyclic aromatic hydrocarbon (PAH) equivalent widths (EWs), indicative of the presence of active galactic nuclei (AGNs), span the full range in [C II]/FIR. However, we show that even when only pure star-forming galaxies are considered, the [C II]/FIR ratio still drops by an order of magnitude, from 10{sup -2} to 10{sup -3}, with {Sigma}{sub MIR} and {Sigma}{sub IR}, implying that the [C II]157.7 {mu}m luminosity is not a good indicator of the star formation rate (SFR) for most local LIRGs, for it does not scale linearly with the warm dust emission most likely associated to the youngest stars. Moreover, even in LIRGs in which we detect an AGN in the mid-IR, the majority (2/3) of galaxies show [C II]/FIR {>=} 10{sup -3} typical of high 6.2 {mu}m PAH EW sources, suggesting that most AGNs do not contribute significantly to the FIR emission. We provide an empirical relation between the [C II]/FIR and the specific SFR for star-forming LIRGs. Finally, we present predictions for the starburst size based on the observed [C II] and FIR luminosities which should be useful for comparing with results from future surveys of high-redshift galaxies with ALMA and CCAT.

  12. New Light on Dark Energy (LBNL Science at the Theater)

    ScienceCinema (OSTI)

    Linder, Eric; Ho, Shirly; Aldering, Greg; Fraiknoi, Andrew

    2011-06-08T23:59:59.000Z

    A panel of Lab scientists ? including Eric Linder, Shirly Ho, and Greg Aldering ? along with Andrew Fraiknoi, the Bay Area's most popular astronomy explainer, gathered at the Berkeley Repertory Theatre on Monday, April 25, 2011, for a discussion about "New Light on Dark Energy." Topics will include hunting down Type 1a supernovae, measuring the universe using baryon oscillation, and whether dark energy is the true driver of the universe.

  13. Spitzer Quasar and ULIRG Evolution Study (QUEST): II. The Spectral Energy Distributions of Palomar-Green Quasars

    E-Print Network [OSTI]

    Hagai Netzer; Dieter Lutz; Mario Schweitzer; Alessandra Contursi; Eckhard Sturm; Linda J. Tacconi; Sylvain Veilleux; D. -C. Kim; David Rupke; Andrew J. Baker; Kalliopi Dasyra; Joseph Mazzarella; Steven Lord

    2007-06-06T23:59:59.000Z

    This is the second paper studying the QSOs in the spitzer QUEST sample. Previously we presented new PAH measurements and argued that most of the observed far infrared (FIR) radiation is due to star-forming activity. Here we present spectral energy distributions (SEDs) by supplementing our data with optical, NIR and FIR observations. We define two sub-groups of ``weak FIR'' and ``strong FIR'' QSOs, and a third group of FIR non-detections. Assuming a starburst origin for the FIR, we obtain ``intrinsic'' AGN SEDs by subtracting a starburst template from the mean SEDs. The resulting SEDs are remarkably similar for all groups. They show three distinct peaks corresponding to two silicate emission features and a 3mic bump that we interpret as the signature of the hottest AGN dust. They also display drops beyond 20mic that we interpret as the signature of the minimum temperature (about 200K) dust. This component must be optically thin to explain the silicate emission and the slope of the long wavelength continuum. We discuss the merits of an alternative model where most of the FIR emission is due to AGN heating. Such models are unlikely to explain the properties of our QSOs but they cannot be ruled out for more luminous objects. We also find correlations between the luminosity at 5100A and two infrared starburst indicators: L(60mic) and L(PAH 7.7mic). The correlation of L(5100A) with L(60mic) can be used to measure the relative growth rates and lifetimes of the black hole and the new stars.

  14. Highly tunable quantum Hall far-infrared photodetector by use of GaAs/Al{sub x}Ga{sub 1?x}As-graphene composite material

    SciTech Connect (OSTI)

    Tang, Chiu-Chun [Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan (China); Ling, D. C. [Department of Physics, Tamkang University, Tamsui Dist., New Taipei City 25137, Taiwan (China); Chi, C. C.; Chen, Jeng-Chung [Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan (China); Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan (China)

    2014-11-03T23:59:59.000Z

    We have developed a highly tunable, narrow band far-infrared (FIR) photodetector which utilizes the characteristic merits of graphene and two-dimensional electron gas (2DEG) in GaAs/Al{sub x}Ga{sub 1?x}As heterostructure in the Quantum Hall states (QHS). The heterostructure surface is covered with chemical vapor-deposited graphene, which functions as a transparent top-gate to vary the electron density of the 2DEG. FIR response observed in the vicinity of integer QH regime can be effectively tuned in a wide range of 27–102?cm{sup ?1} with a bias voltage less than ?1?V. In addition, we have found that the presence of graphene can genuinely modulate the photoresponse. Our results demonstrate a promising direction for realizing a tunable long-wavelength FIR detector using QHS in GaAs 2DEG/ graphene composite material.

  15. Optical Spectra of Dusty Starbursts

    E-Print Network [OSTI]

    B. M. Poggianti

    2000-11-23T23:59:59.000Z

    This contribution presents the optical spectral properties of FIR-luminous galaxies, whose distinctive feature is often the simultaneous presence in the spectra of a strong $\\rm H\\delta$ line in absorption and of emission lines (e(a) spectra). A discrepancy between the star formation rate estimated from the FIR luminosity and that derived from the $\\rm H\\alpha$ luminosity persists even after having corrected the $\\rm H\\alpha$ flux for dust according to the observed Balmer decrement. It is shown that the e(a) spectrum can be reproduced assuming a current starburst and dust extinction affecting the youngest stellar populations much more than the older stars.

  16. Optical layout and mechanical structure of polarimeter-interferometer system for Experimental Advanced Superconducting Tokamak

    SciTech Connect (OSTI)

    Zou, Z. Y.; Liu, H. Q., E-mail: hqliu@ipp.ac.cn; Jie, Y. X.; Wang, Z. X.; Shen, J. S.; An, Z. H.; Yang, Y.; Zeng, L.; Wei, X. C.; Li, G. S.; Zhu, X. [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031 (China); Ding, W. X.; Brower, D. L. [Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095 (United States); Lan, T. [Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China)

    2014-11-15T23:59:59.000Z

    A Far-InfaRed (FIR) three-wave POlarimeter-INTerferometer (POINT) system for measurement current density profile and electron density profile is under development for the EAST tokamak. The FIR beams are transmitted from the laser room to the optical tower adjacent to EAST via ?20 m overmoded dielectric waveguide and then divided into 5 horizontal chords. The optical arrangement was designed using ZEMAX, which provides information on the beam spot size and energy distribution throughout the optical system. ZEMAX calculations used to optimize the optical layout design are combined with the mechanical design from CATIA, providing a 3D visualization of the entire POINT system.

  17. Genetic diversity enhances the resistance of a seagrass ecosystem to disturbance

    E-Print Network [OSTI]

    Stachowicz, Jay

    , nutrient cycling, or resistance to disturbance or invasion relative to systems with fewer species of declining species richness on short-term processes such as pro- duction, community respiration, and nutrient). Nevertheless, many important ecosystems, such as kelp forests, cattail marshes, and fir forests, are dominated

  18. PART III DIVISION 9 PAGE 1 RUTGERS DESIGN STANDARDS MANUAL MAY 2008 DIVISION 09 FINISHES

    E-Print Network [OSTI]

    , Electrical Closets and Mechanical Rooms Armstrong School Zone Fine Fissured #466 24"x48" panels, square lay: Armstrong Mesa #680 for 2 x2 Armstrong Mesa#683 for 2 x4 NRC rating: .60 HumiGuard Plus BioBlock 55% recycled content / $ Upgrade: Armstrong Ultima #1911 for 2 x2 Armstrong Ultima #1914 fir 2x4 Beveled

  19. o Fences roun Fi JAMES L. MURPHY AND HARRY E. SCHIMKE

    E-Print Network [OSTI]

    Standiford, Richard B.

    clover (Chamaebatia foliosa), and manzanita brush r..Q.t9J~...tgRholus viscida). There were twoo Fences roun Fi JAMES L. MURPHY AND HARRY E. SCHIMKE ABSTRACT: Five meshes (1/8 to 1 inch) of 16-breaks - -retard them until fir e crews a r r i v ed, costs of installing and maintaining fences might be justified

  20. Area and Throughput Trade-Offs in the Design of Pipelined Discrete Wavelet Transform Architectures

    E-Print Network [OSTI]

    Boyer, Edmond

    Area and Throughput Trade-Offs in the Design of Pipelined Discrete Wavelet Transform Architectures wavelet transform (DWT) as a linear space-to-frequency transform of the image domain in an irreversible compression. This irreversible discrete wavelet transform is implemented by FIR filter using 9/7 Daubechies

  1. * Submitted in partial fulfillment of the requirements for a Degree with Honors from the University of Maine Cary Institute of Ecosystem Studies 1

    E-Print Network [OSTI]

    Lovett, Gary M.

    , the importance of carbon mitigation and fossil fuel offset grows. A mixture of spruce-fir and mixed hardwood of Maine Cary Institute of Ecosystem Studies 1 NORTHEAST FORESTS: AN ASSESMENT OF CURRENT CARBON STOCKS. As atmospheric carbon continues to rise and U.S. fossil fuel use moves beyond 2000 million metric tons per year

  2. Nuclear Instruments and Methods in Physics Research A ] (

    E-Print Network [OSTI]

    Kono, Junichiro

    evolution of the transmission and reflection of a FIR probe pulse after near-infrared (NIR) excitation, TX 77005, USA Abstract Ultrashort pulses of intense, coherent, and tunable far-infrared and mid-infrared and quantum-confined semiconductors using such radiation. These experiments include: far-infrared spectroscopy

  3. The ULIRG NGC 6240: Luminous extended Xray emission and evidence for an AGN

    E-Print Network [OSTI]

    Greiner, Jochen

    spectrum can be well fit by emission from two components in roughly equal proportions: a thermal optically for the formation of this AGN. However, the lu­ minosity in the remaining extended thermal component is still et al. 1997). Within this core most of the ulti­ mate enigmatic power source of the FIR radiation

  4. An Electron Bunch Compressor Based on an FEL Interaction in the Far Infra Red

    E-Print Network [OSTI]

    Gaupp, Andreas

    2013-01-01T23:59:59.000Z

    In this note an electron bunch compressor is proposed based on FEL type interaction of the electron bunch with far infrared (FIR) radiation. This mechanism maintains phase space density and thus requires a high quality electron beam to produce bunches of the length of a few ten micrometer.

  5. Phytopathol. Mediterr. (2005) 44, 0000 This review describes in chronological order the

    E-Print Network [OSTI]

    California at Berkeley, University of

    that has captured the imagination of tree lovers and tim- ber companies alike. Costal forests of Northern California also include several additional timber- producing species such as Douglas-fir (Pseudotsuga difficulties for re- generating coniferous timber species. However, tanoak plays important ecological roles

  6. Original article Belowground biomass and nutrient content in a

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Original article Belowground biomass and nutrient content in a 47-year-old Douglas-fir plantation, France (Received 17 July 2000; accepted 6 October 2000) Abstract ­ Biomass and nutrient content and root biomass or nutrient content were observed. The root biomass was 58 t of dry matter, which was 18

  7. Interaction of far-infrared and mid-infrared laser transitions in the ammonia laser

    SciTech Connect (OSTI)

    Nelson, L.Y.; Buchwald, M.I.; Jones, C.R.

    1980-01-01T23:59:59.000Z

    Mid-infrared laser emission in ammonia is usually observed on a P(J + 2) transition when a CO/sub 2/ laser is used to optically pump a near resonant R(J) absorption feature. However, by generating simultaneous FIR ammonia laser emission in the same optical cavity, mid-infrared emission is obtained exclusively on the P(J) transition.

  8. Habitat associations of cavity-nesting owls in the Sierra Nevada

    E-Print Network [OSTI]

    Groce, Julie Elizabeth

    2009-05-15T23:59:59.000Z

    for statistical analysis, with a detection probability of 0.25. I detected saw-whets in a wide range of conditions and it appeared that few factors influenced their distribution in the basin. Areas dominated by white fir, however, were correlated with the absence...

  9. Sea-level rise orfall? SIR -Schneider' provides just one ex-

    E-Print Network [OSTI]

    Shlyakhter, Ilya

    and energy production? Such questions can be addressed by comparing the data on the history of previous from various sources: projections of US energy demand in 2000 AD (heavy dotted line); measured distribution (heavy broken dash line) corres- ponding to the sample size per bin fir the energy data

  10. Effects of long-term water stress on net photosynthesis, growth and water-use efficiency of conifers in the field

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Effects of long-term water stress on net photosynthesis, growth and water-use efficiency the highest net photosynthesis PICEA and thus also 'the fastest growth. Douglas fir was superior to spruce into consideration. Thus, the reduction in net photosynthesis was always greater on long and sunny summer days

  11. product platforms Marc H. Meyer, Olivier de Weck and Tucker

    E-Print Network [OSTI]

    de Weck, Olivier L.

    FIR ST PAG E PR O O FS wiem05025 product platforms Marc H. Meyer, Olivier de Weck and Tucker Marion across existing products as well as new market appli- cations (Meyer, Tertzakian, and Utterback, 1997). Designing, developing, and integrating ``product platforms'' is a tried and true practice for accomplishing

  12. An Adaptive DFE using an IIR Feedback Equalizer for 100BASE-TX Ethernet*

    E-Print Network [OSTI]

    Hurst, Paul J.

    (FBE) to remove ISI. Such a DFE requires many FIR taps for long cable lengths, increasing the size and a 12-tap FBE. This paper describes a reduced complexity DFE structure for equalizing data transmitted, the new DFE structure using an infinite-impulse response (IIR) FBE is simpler than a conventional DFE

  13. Infrared reflectance and transmission spectra in II-VI alloys and superlattices

    E-Print Network [OSTI]

    Talwar, Devki N.

    Room temperature measurements of the far-infrared (FIR) reflectance spectra are reported for the polar optical phonons in a series of bulk Cd[subscript x]Zn[subscript 1?x]Te (0 ? x ? 1) and CdSe[subscript x]Te[subscript ...

  14. Ultrafast and Nonlinear Spectroscopy of Solids with Small Energy Photons Department of Electrical and Computer Engineering, Rice Quantum Institute, and

    E-Print Network [OSTI]

    Kono, Junichiro

    (FIR) and mid-infrared (MIR) radiation, achievable with free- electron lasers (FELs) and optical and sample damage, lead- ing to extreme nonlinear optical behavior in semiconduc- tors.23,24) Furthermore, Rice University, Houston, Texas 77005, U.S.A. Ultrashort pulses of intense, coherent, and tunable far-infrared

  15. BIBLIOGRAPHY 0 P Autho r Ind -19

    E-Print Network [OSTI]

    Branch of Reports Bureau of Commercial Fis h er i es U .S . Fis h and Wildlife Service Seattle for the guidance of fis hery products ins pectors and is not fo r public dislribu- lion.) United States stan dards for grades of frozen ra w breaded fis h p o rtions. (March ), (Fir st iss ue ) 7 p . Gauglitz, E rich J. , Jr

  16. USDA Forest Service Proceedings RMRS-P-18. 2001. 377 1Pike and San Isabel National Forests,

    E-Print Network [OSTI]

    USDA Forest Service Proceedings RMRS-P-18. 2001. 377 1Pike and San Isabel National Forests, USDA Forest Service, Pueblo, CO. Aspen Regeneration in South-Central Colorado, San Isabel National Forest Tim regeneration. Following harvest, the Douglas-fir and some Engelmann spruce stands in the Arkansas Hills area

  17. ioEegions2of2the2gliforni2rovine2qrdens 0 250 500 750 1,000125

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    Forest North Coast Maritime Chaparral/ North Coast Prarie North Coast Range-outer Northern California Habitat Redwood Forest/Riparian Santa Cruz Mountain Douglas Fir Forest Santa Cruz Mountain Flora Santa Cruz Region Ponderosa Pine/ Sand Hills Valley Oak Woodland Western Klamath Ranges 1 2 3 4 5 8 7 6 9 10

  18. Lee J Rickard Long Wavelength Array

    E-Print Network [OSTI]

    Ellingson, Steven W.

    , Ventilating, and Air Conditioning ICD Interface Control Document ION Ionosphere ­ in WBS, refers Monitoring & Control System MMIC Monolithic Microwave Integrated Circuit MRO Magdalena Ridge Observatory Design Review CIC Cascaded IntegratorComb ­ a combination of FIR filter and decimator CME Coronal

  19. Far-Infrared Dielectric Properties of Polar Liquids Probed by Femtosecond Terahertz Pulse Spectroscopy

    E-Print Network [OSTI]

    the microwave and the FIR regions; the motions that are probed at these frequencies bridge the gap between bulk to study gases,2 semiconductors,3 super- conductors,4 dielectrics,5 nonpolar liquids,6 and water.7 We are generated by the excitation of charge carriers in a semiconductor material with ultrashort pulses of above

  20. Original article Micronutrients in biomass fractions

    E-Print Network [OSTI]

    Boyer, Edmond

    Original article Micronutrients in biomass fractions of holm oak, beech and fir forests biomass fractions in individual monospecific stands of holm oak (Quercus ilex L), beech (Fagus sylvatica L in different biomass fractions of the holm oak forest studied. This can be related to the low soil pH values

  1. Blind Equalization via Approximate Maximum Likelihood Source Seungjin CHOI x1 and Andrzej CICHOCKI y

    E-Print Network [OSTI]

    Choi, Seungjin

    Blind Equalization via Approximate Maximum Likelihood Source Separation Seungjin CHOI x1, RIKEN 2-1 Hirosawa, Wako-shi Saitama 351-0198, JAPAN Abstract Blind equalization of single input multiple output (SIMO) FIR channels can be refor- mulated as the problem of blind source separation

  2. RECURSIVE BLIND EQUALIZATION WITH AN OPTIMAL BOUNDING ELLIPSOID M. Pouliquen, M. Frikel, M. Denoual

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    RECURSIVE BLIND EQUALIZATION WITH AN OPTIMAL BOUNDING ELLIPSOID ALGORITHM M. Pouliquen, M. Frikel.pouliquen@unicaen.fr ABSTRACT In this paper, we present an algorithm for blind equalization i.e. equalization without training some simulations are performed. Index Terms-- Blind Equalization, FIR equalizer. 1. INTRODUCTION

  3. Bibliography [AB94] M. Alencar and I. Blake. The capacity for a discrete

    E-Print Network [OSTI]

    Verdú, Sergio

    , 1995. [AC97] S. Amari and J. Cardoso. Blind source separation­ semiparametric statistical approach­Spectrum communication systems. PhD thesis, University of Massachusetts, Amherst, Mass, Sept. 1996. [AD62] E. Arthurs. Moulines. Sub­ space blind identification of multichannel FIR with un­ known spatial covariance. IEEE

  4. Technical Report -DTU -Informatics and Mathematical Modeling (May 31, 2007) Temperature Prediction in District

    E-Print Network [OSTI]

    Prediction in District Heating Systems with cFIR models Pierre Pinson , Torben S. Nielsen, Henrik Aa. Nielsen, Lyngby, Denmark Abstract Current methodologies for the optimal operation of district heating systems regularization. Results are given for the test case of the Roskilde district heating system, over a period

  5. In: Forest Decline: Causes and Impacts ISBN 978-1-61470-002-9 Editor: Joshua A. Jenkins, pp. 2011 Nova Science Publishers, Inc.

    E-Print Network [OSTI]

    Herrera, Carlos M.

    the response of several tree species from the Mediterranean Basin to recent climate change. We summarize, distribution shifts in Mediterranean mountains attribute the majority of observed changes to either climate-growth and regional climatic trends in four tree species from western Mediterranean Mountains: Silver fir (Abies alba

  6. From Border to Border: Skiing Across Finland John Bardsley

    E-Print Network [OSTI]

    Bardsley, John

    to the Swedish border at Tornio, and it traverses some of Finland's most beautiful countryside. Getting, an old school and reindeer farm, and gorgeous colors and scenery. The day's excursion ends at an old is similar, with winding and undulating track through the pine, spruce and fir forests of western Finland

  7. Sponsored by FRidAY JulY 22, 2o11 at 8pm

    E-Print Network [OSTI]

    Williams, Brian C.

    l l e Sa i n t- Sa ë n S (1835 ­1921) Symphony No. 3 in C minor, Op. 78, "Organ" I. Adagio--Allegro moderato--Poco adagio II. Allegro moderato--Presto--Maestoso--Allegro FirSt violin Susanna Ogata

  8. New Forestry Commission District Office The new Forestry Commission

    E-Print Network [OSTI]

    on sustainable design principles, ensuring a reduced carbon footprint in both the construction beams made from Douglas fir harvested from the Forestry Commission's own forests. The building design in Inverness demonstrates an exemplary approach to using sustainable principles and local timber

  9. B.S. Computer Science (CS 26): Major Checklist Completed Lower Division (52 units)

    E-Print Network [OSTI]

    Zhou, Yuanyuan

    . to Probability & Statistics Completed Upper Division (76 units) Upper-Division (Core) Computer Science CSE 100 Mathematics Math 20A, Calculus for Science and Engineering Math 20B, Calculus fir Science and Engineering Math 20C, Calculus and Analytical Geometry for Science and Engineering Math 20F, Linear Algebra General

  10. A fourier spectrometer for studying the radiation from Josephson Junctions

    SciTech Connect (OSTI)

    Verevkin, A.A.; Il`in, V.A.; Lipatov, A.P. [V.I. Lenin Moscow Pedagogical State Univ., Moscow (Russian Federation)

    1995-06-01T23:59:59.000Z

    The paper describes a Fourier spectrometer designed to study the radiation generated by a Josephson junction in the millimeter and FIR bands with a resolution of {approx}2 GHz in the two-pass mode and {approx}1 GHz in the multipass mode. A feature is that one Josephson junctions operates as both generator and detector at the same time.

  11. Combination of Fixed and Mobile Cameras for Automatic Pedestrian Detection

    E-Print Network [OSTI]

    Bierlaire, Michel

    in the shape, pose, color distribution, and behavior affect the robustness of the detection process. A novel the rest is dark. Nonetheless, since FIR images depend on the temperature of the objects, an outdoor scene has a number of factors that affect the images. Strong sun heating can introduce texture due

  12. www.forestry.gov.uk Trees are all good at different

    E-Print Network [OSTI]

    they: Produce timber, food and many other useful products including medicines Provide places for work in the forest. There have been beech trees in southern Britain ever since the end of the Ice Age, which is over including making plywood and building houses. Douglas firs can also produce a lot of timber because

  13. Far-infrared laser vibration-rotation-tunneling spectroscopy of the propane-water compkx: Torsional dynamics of the hydrogen

    E-Print Network [OSTI]

    Cohen, Ronald C.

    Far-infrared laser vibration-rotation-tunneling spectroscopy of the propane-water compkx: Torsional 1993) The far-infrared laservibration-rotation-tunneling (FIR-VRT) spectrumof the propane-water complex calculations. In the present paper and in its counterpart,13we present our results for the water-propane

  14. Evaluating the Contribution of Climate Forcing and Forest Dynamics to Accelerating Carbon Sequestration by Forest Ecosystems in the Northeastern U.S.: Final Report

    SciTech Connect (OSTI)

    Munger, J. William [Harvard University, SEAS] (ORCID:0000000210428452); Foster, David R. [Harvard University, Harvard Forest; Richardson, Andrew D. [Harvard University, OEB

    2014-10-01T23:59:59.000Z

    This report summarizes work to improve quantitative understanding of the terrestrial ecosystem processes that control carbon sequestration in unmanaged forests It builds upon the comprehensive long-term observations of CO2 fluxes, climate and forest structure and function at the Harvard Forest in Petersham, MA. This record includes the longest CO2 flux time series in the world. The site is a keystone for the AmeriFlux network. Project Description The project synthesizes observations made at the Harvard Forest HFEMS and Hemlock towers, which represent the dominant mixed deciduous and coniferous forest types in the northeastern United States. The 20+ year record of carbon uptake at Harvard Forest and the associated comprehensive meteorological and biometric data, comprise one of the best data sets to challenge ecosystem models on time scales spanning hourly, daily, monthly, interannual and multi-decadal intervals, as needed to understand ecosystem change and climate feedbacks.

  15. Toward the Total Synthesis of Norzoanthamine: The Development of a Transannular Michael Reaction Cascade

    E-Print Network [OSTI]

    Xue, Haoran

    2013-03-06T23:59:59.000Z

    -Alder reaction O O H H OTMS O H PO H H tBuO H OP H H 2.7, P= TES OTMS OtBu OPO OP 2.5, P=TES KHMDS, PhSeBr, THF, -10 oC 91% O OTMS OtBu OPO OP mCPBA, CH2Cl2, -78 oC; then NaHCO3, CHCl3, 40 oC, 4 h O H H H HO H H H OH H H...

  16. Diazo group as a new chemical reporter for bioorthogonal labelling of biomolecules

    E-Print Network [OSTI]

    Josa-Culleré, Laia; Wainman, Yelena A.; Brindle, Kevin M.; Leeper, Finian J.

    2014-10-14T23:59:59.000Z

    with hydrazine and hydroxylamine derivatives,1,6,10 azides that can be modified with phosphines or reactive alkynes,7,8,11-13 terminal alkynes that can be tagged with azides,14 and strained alkenes15-20 and isonitriles21 that can be ligated with tetrazines... to perform very efficient [3+2] cycloadditions with 1,3-dipoles and inverse-electron-demand Diels Alder reactions with tetrazines, making it suitable for applications in chemical ligation.23 In order to test whether the diazo group could be used as a...

  17. Ecology of the predator assemblage affecting nest success of passerines in Sierra Nevada, California

    E-Print Network [OSTI]

    Cocimano, Maria C.

    2010-07-14T23:59:59.000Z

    were surveyed since 1997 (15 from 1997 to 2006, plus 6 added in 2003). My study areas were located in montane meadows in central Sierra Nevada, California, USA, including El Dorado, Placer, Nevada, and Sierra counties. The area presents a... the line intercept method (Bonham 1989), using a pole (200 cm tall ? 1.25 cm diameter). I took measurements every 3 meters, including vegetation type, as each species of plant that touched the pole (willow, other shrub species, grass/forbs, aspen, alder...

  18. Lewis acid complexation to an N?-acylsulfonamide: an NMR investigation

    E-Print Network [OSTI]

    Klimko, Ann Marie

    2012-06-07T23:59:59.000Z

    ) . . . . . . . . . . . . . 67 3, 3-Dihydro-2-crotonyl-l, 2-benzothiazol- 1, 1-dioxide (15, R=H, R' =CHS) . . . . . . . . . . . 67 Preparation of TiC12 (OiPr) 2 by a modification of the method of Rousseau. . . . 68 General method for Diels-Alder reactions catalyzed...-N- (o-toluenesul fonyl) acrylamide (14, R' =H) 63 TABLE OF CONTENTS (CONT. ) Page g- (1, 8-Naphthosul fonyl) crotonamide (16, R' =CHs) . 64 3-Chloro-1, 2-benzothiazol-l, l- dioxide. , 65 3, 3-Dimethyl-2, 3-dihydro-1, 2-benzothiazol- l, l...

  19. Photochemistry of 1 and 2-(2-methylphenyl)-1,6-heptadiene. [4a-methyl-1,2,3,4,4a,9,10,10a-octahydrophenanthrene

    SciTech Connect (OSTI)

    Barrows, R.D.; Hornback, J.M.

    1982-01-01T23:59:59.000Z

    In an attempt to synthesize partially saturated phenanthrene derivatives by an intramolecular Diels-Alder reaction between a photochemically produced o-xylylene (diene) and a tethered dienophile, it was found that 1 and 2 underwent a photochemically allowed (2 + 2) cycloaddition. Irradiation of 1 gave 6-(2-methylphenyl)bicyclo(3.2.0)heptane in 86% yield. Upon irradiation of 2, a benzvalene rearrangement of 2 first took place, producing the meta isomer 2-(3-methylphenyl)-1,6-heptadiene, followed by a (2 + 2) photocycloaddition giving 1-(3-methylphenyl)bicyclo(3.2.0)heptane in 15% yield. Direct irradiation of 2-(3-methylphenyl)-1,6-heptadiene gave the same bicyclo derivative as 2 in 34% yield. Examination of the fluorescence spectra of 1 and 2 in comparison with 1-(2-methylphenyl)propene and 2-(2-methylphenyl)-1-butene, respectively, has shown that 1 may be biased toward (2 + 2) cycloaddition where 2 is not biased toward (2 + 2) photocycloization. Attempts to produce 4a-methyl-1,2,3,4,4a,9,10,10a-octahydrophenanthrene by an intramolecular Diels-Alder reaction of the o-xylylene produced by irradiation of 3 will also be described.

  20. Advanced Blade Manufacturing Project - Final Report

    SciTech Connect (OSTI)

    POORE, ROBERT Z.

    1999-08-01T23:59:59.000Z

    The original scope of the project was to research improvements to the processes and materials used in the manufacture of wood-epoxy blades, conduct tests to qualify any new material or processes for use in blade design and subsequently build and test six blades using the improved processes and materials. In particular, ABM was interested in reducing blade cost and improving quality. In addition, ABM needed to find a replacement material for the mature Douglas fir used in the manufacturing process. The use of mature Douglas fir is commercially unacceptable because of its limited supply and environmental concerns associated with the use of mature timber. Unfortunately, the bankruptcy of FloWind in June 1997 and a dramatic reduction in AWT sales made it impossible for ABM to complete the full scope of work. However, sufficient research and testing were completed to identify several promising changes in the blade manufacturing process and develop a preliminary design incorporating these changes.

  1. Comments on the paper "The initial conditions of isolated star formation - VI. SCUBA mapping of prestellar cores" (Kirk et al. 2005)

    E-Print Network [OSTI]

    Laurent Pagani; Guilaine Lagache

    2005-10-13T23:59:59.000Z

    In their survey paper of prestellar cores with SCUBA, Kirk et al. (2005) have discarded two of our papers on L183 (Pagani et al. 2003, 2004). However these papers bring two important pieces of information that they cannot ignore. Namely, the real structure of L183 and the very poor correlation between submillimeter and far infrared (FIR) dust emission beyond \\Avb $\\approx$ 15 mag. Making the erroneous assumption that it is the same dust that we are seeing in emission at both 200 and 850 $\\mu$m, they derive constant temperatures which are only approximate, and column densities which are too low. In fact dust temperatures do decrease inside dark clouds and the FIR emission is only tracing the outer parts of the dark clouds (Pagani et al. 2004)

  2. Climate of Change: A Foreign Policy Analysis of China's Participation in International Environmental Agreements

    E-Print Network [OSTI]

    Hodgson, Andrew

    2011-04-25T23:59:59.000Z

    specif influees studied in the broader foreign policy literaure. Methods This study utilzes the congruence mthod, and to a more limted extnt, proces tracing, as decribed by Gorge and Bennet (2005), to analyze thre cas: the 1987 Montreal Protocol... with events (Gorge and Bennet 2005). The 25 congruence mthod is useful in this cae because it requires relatively litle data. Chinese foreign policy deison-making is hitorily, and remains a firly closd procs. Theref its dificult to gather detailed...

  3. Catalogue of the Flora of Texas.

    E-Print Network [OSTI]

    Cory, V. L. (Vivian L.); Parks, Harris Bradley

    1937-01-01T23:59:59.000Z

    .) Kunze 4 ......................... normalis C . Chr . (D . patens Kunze) 1-2-3-4-5 ................. Thelypteris (L.) A . Gray Marsh Shieldfern 1-2 GYMNOPTERIS hispida (Mett.) Underw . (Bommeria hispida Underw.). ........ 6 NOTHOLAENA... ................................... . Taeda L Loblolly Pine 1-2 CATALOGUE OF THE FLORA OF TEXAS 13 PSEUDOTSUGA mucronata (Raf.) Sudw . Douglas Fir ....................... 6 TAXODIUM .............. distichum (L.) L . C . Rich Southern Cypress 1-2-3-4-5...

  4. MAGNETIC FIELD STRUCTURES AND TURBULENT COMPONENTS IN THE STAR-FORMING MOLECULAR CLOUDS OMC-2 AND OMC-3

    SciTech Connect (OSTI)

    Poidevin, Frederick [Universidade de Sao Paulo, Instituto de Astronomia, Geofisica e CIencas Atmosfericas, Rua do Matao 1226, Butanta, Sao Paulo, SP 05508-900 (Brazil); Bastien, Pierre [Departement de Physique and Observatoire du Mont-Megantic, Universite de Montreal, C.P. 6128, Succ. Centre-ville, Montreal, Quebec H3C 3J7 (Canada); Matthews, Brenda C., E-mail: Poidevin@astro.iag.usp.b, E-mail: Bastien@astro.umontreal.c, E-mail: brenda.matthews@nrc-cnrc.gc.c [Herzberg Institute of Astrophysics, National Research Council of Canada, Victoria, BC (Canada)

    2010-06-20T23:59:59.000Z

    The SCUBA polarized 850 {mu}m thermal emission data of the OMC-2 region in Orion A are added to and homogeneously reduced with data already available in the OMC-3 region. The data set shows that OMC-2 is a region generally less polarized than OMC-3. Where coincident, most of the 850 {mu}m polarization pattern is similar to that measured in 350 {mu}m polarization data. Only 850 {mu}m polarimetry data have been obtained in and around MMS7, FIR1 and FIR2, and in the region south of FIR6. A realignment of the polarization vectors with the filament can be seen near FIR1 in the region south of OMC-3. An analysis shows that the energy injected by CO outflows and H{sub 2} jets associated with OMC-2 and OMC-3 does not appear to alter the polarization patterns at a scale of the 14'' resolution beam. A second-order structure function analysis of the polarization position angles shows that OMC-2 is a more turbulent region than OMC-3. OMC-3 appears to be a clear case of a magnetically dominated region with respect to the turbulence. However, for OMC-2 it is not clear that this is the case. A more in-depth analysis of five regions displayed along OMC-2/3 indicates a decrease of the mean polarization degree and an increase of the turbulent angular dispersion from north to south. A statistical analysis suggests the presence of two depolarization regimes in our maps: one regime including the effects of the cores, the other one excluding it.

  5. STAR FORMATION IN LINER HOST GALAXIES AT z {approx} 0.3

    SciTech Connect (OSTI)

    Tommasin, Silvia; Netzer, Hagai; Sternberg, Amiel [School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978 (Israel); Nordon, Raanan; Lutz, Dieter; Berta, Stefano; Magnelli, Benjamin [MPE, Postfach 1312, 85741 Garching (Germany); Bongiorno, Angela [INAF-Oservatorio Astronomico di Roma, via Frascati 33, 00040 Monte Porzio Catone (Roma) (Italy); Le Floc'h, Emeric; Riguccini, Laurie [Laboratoire AIM, CEA/DSM-CNRS-Universite Paris Diderot, IRFU/Service d'Astrophysique, Bat 709, CEA-Saclay, 91191 Gif-sur-Yvette Cedex (France); Pozzi, Francesca [Dipartimento di Astronomia, Universita degli Studi di Bologna, via Ranzani 1, 40127 Bologna (Italy)

    2012-07-10T23:59:59.000Z

    We present the results of a Herschel-PACS study of a sample of 97 low-ionization nuclear emission-line regions (LINERs) at redshift z {approx} 0.3 selected from the zCOSMOS survey. Of these sources, 34 are detected in at least one PACS band, enabling reliable estimates of the far-infrared L{sub FIR} luminosities, and a comparison to the FIR luminosities of local LINERs. Many of our PACS-detected LINERs are also UV sources detected by GALEX. Assuming that the FIR is produced in young dusty star-forming regions, the typical star formation rates (SFRs) for the host galaxies in our sample are {approx}10 M{sub Sun} yr{sup -1}, 1-2 orders of magnitude larger than in many local LINERs. Given stellar masses inferred from optical/NIR photometry of the (unobscured) evolved stellar populations, we find that the entire sample lies close to the star-forming 'main sequence' for galaxies at redshift 0.3. For young star-forming regions, the H{alpha}- and UV-based estimates of the SFRs are much smaller than the FIR-based estimates, by factors {approx}30, even assuming that all of the H{alpha} emission is produced by O-star ionization rather than by the active galactic nuclei (AGNs). These discrepancies may be due to large (and uncertain) extinctions toward the young stellar systems. Alternatively, the H{alpha} and UV emissions could be tracing residual star formation in an older, less obscured population with decaying star formation. We also compare L{sub SF} and L(AGN) in local LINERs and in our sample. Finally, we comment on the problematic use of several line diagnostic diagrams in cases with an estimated obscuration similar to that in the sample under study.

  6. On the Approximation of Distributed-Delay Control Laws

    E-Print Network [OSTI]

    Mirkin, Leonid

    -dimensional internal feedback of the form P -P e-sh (here P is the delay-free plant and h is the loop delay) that aims can be replaced with . = Pa -P e-sh (modified/generalized Smith predictor), where Pa is a rational e-Agh (sI - Ag)-1 Bg. The finite impulse response (FIR) com- pletion h{G e-sh } of G e-sh is defined

  7. Conversion of trimmed NURBS surfaces to Catmull–Clark subdivision surfaces

    E-Print Network [OSTI]

    Shen, Jingjing; Kosinka, Ji?í; Sabin, Malcolm; Dodgson, Neil

    2014-06-27T23:59:59.000Z

    [m3G; v 1.134; Prn:16/07/2014; 8:22] P.8 (1-13) 8 Fig pla w Fi 5. sc Fi po po w m po ta si al 5.1 (o Ch su (s ro 5. ne st to w w su no firJ. Shen et al. / Computer Aided Geometric Design ••• (••••) •••–••• . 5. The resulting subdivision surfaces...

  8. MFR PAPER 1107 Some Marketing Considerations with

    E-Print Network [OSTI]

    INTRODUCTION rhere I, Ilne lh lng \\\\e ca n ,a) ahoul lhe Cllnlcl1lpllran li,h mar\\...el lng ,cene Illlhll i,h IIltll a realll) MARKETING PRO BLEMS \\\\ hat th:n .lrL the mar\\...el lng Pfllh- 11111, \\\\ Ith 'c\\...e end prllduct )' Hrnaull ,pea\\...lng \\Ie can Idellt!l, I'ur ul'>llnct pfl)hlcm, FIr,t. there I

  9. Copyright 2012 AmeriCAn ChemiCAl SoCiety

    E-Print Network [OSTI]

    Whitton, Mary C.

    -0-8412-2817-7 printeD in the UniteD StAteS of AmeriCA #12;Creating Safety CultureS in aCademiC inStitutionS: a report of the Safety Culture taSk forCe of the aCS Committee on ChemiCal Safety firSt edition a publiS Safety Culture task force

  10. PHOTOMETRIC REDSHIFTS OF SUBMILLIMETER GALAXIES

    SciTech Connect (OSTI)

    Chakrabarti, Sukanya [School of Physics and Astronomy, Rochester Institute of Technology, 84 Lomb Memorial Drive, Rochester, NY 14623 (United States); Magnelli, Benjamin; Lutz, Dieter; Berta, Stefano; Popesso, Paola [Max-Planck-Institut fuer Extraterrestrische Physik, Postfach 1312, Giessenbachstrasse 1, D-85741 Garching (Germany); McKee, Christopher F. [Physics and Astronomy Departments, UC Berkeley, Berkeley, CA 94720 (United States); Pozzi, Francesca, E-mail: chakrabarti@astro.rit.edu [Dipartimento di Astronomia, Universita degli Studi di Bologna, Via Ranzani 1, I-40127 Bologna (Italy)

    2013-08-20T23:59:59.000Z

    We use the photometric redshift method of Chakrabarti and McKee to infer photometric redshifts of submillimeter galaxies with far-IR (FIR) Herschel data obtained as part of the PACS Evolutionary Probe program. For the sample with spectroscopic redshifts, we demonstrate the validity of this method over a large range of redshifts (4 {approx}> z {approx}> 0.3) and luminosities, finding an average accuracy in (1 + z{sub phot})/(1 + z{sub spec}) of 10%. Thus, this method is more accurate than other FIR photometric redshift methods. This method is different from typical FIR photometric methods in deriving redshifts from the light-to-gas mass (L/M) ratio of infrared-bright galaxies inferred from the FIR spectral energy distribution, rather than dust temperatures. To assess the dependence of our photometric redshift method on the data in this sample, we contrast the average accuracy of our method when we use PACS data, versus SPIRE data, versus both PACS and SPIRE data. We also discuss potential selection effects that may affect the Herschel sample. Once the redshift is derived, we can determine physical properties of infrared-bright galaxies, including the temperature variation within the dust envelope, luminosity, mass, and surface density. We use data from the GOODS-S field to calculate the star formation rate density (SFRD) of submillimeter bright sources detected by AzTEC and PACS. The AzTEC-PACS sources, which have a threshold 850 {mu}m flux {approx}> 5 mJy, contribute 15% of the SFRD from all ultraluminous infrared galaxies (L{sub IR} {approx}> 10{sup 12} L{sub Sun }), and 3% of the total SFRD at z {approx} 2.

  11. Riparian mammals in Big Bend National Park and their interrelationships with visitor usages and impacts

    E-Print Network [OSTI]

    Boeer, William Jacob

    1977-01-01T23:59:59.000Z

    . , 1944; McDougall and Sperry, 1951; Denyes, 1956; and Warnock and Kittams, 1970). The Chisos Mountains support dense stands of Mexican Pinyon-Oak-Juniper and Ponderosa Pine- Douglas Fir woodlands (for a list of scientific names of all plants... research work. Studies involving mammals of the Big Bend area began with gene. al surveys (Bailey, 1905; Johnson, 1936; Borell and Bryant, 1942; and Taylor et al. , 1944) designed to identify and document the varied fauna of the area. After the park...

  12. Far-Infrared Properties of Blue Compact Dwarf Galaxies Observed with AKARI/Far-Infrared Surveyor (FIS)

    E-Print Network [OSTI]

    Hiroyuki Hirashita; Hidehiro Kaneda; Takashi Onaka; Toyoaki Suzuki

    2008-09-03T23:59:59.000Z

    We report basic far-infrared (FIR) properties of eight blue compact dwarf galaxies (BCDs) observed by AKARI. We measure the fluxes at the four FIS bands (wavelengths of 65 um, 90 um, 140 um, and 160 um). Based on these fluxes, we estimate basic quantities about dust: dust temperature, dust mass, and total FIR luminosity. We find that the typical dust temperature of the BCD sample is systematically higher than that of normal spiral galaxies, although there is a large variety. The interstellar radiation field estimated from the dust temperature ranges up to 100 times of the Galactic value. This confirms the concentrated star-forming activity in BCDs. The star formation rate can be evaluated from the FIR luminosity as 0.01--0.5 $M_\\odot$ yr$^{-1}$. Combining this quantity with gas mass taken from the literature, we estimate the gas consumption timescales (gas mass divided by the star formation rate), which prove to span a wide range from 1 Gyr to 100 Gyr. A natural interpretation of this large variety can be provided by intermittent star formation activity. We finally show the relation between dust-to-gas ratio and metallicity (we utilize our estimate of dust mass, and take other necessary quantities from the literature). There is a positive correlation between dust-to-gas ratio and metallicity as expected from chemical evolution models.

  13. Radio--Far infrared correlation in "blue cloud" galaxies with 0

    E-Print Network [OSTI]

    Basu, Aritra; Beelen, Alexandre; Singh, Veeresh; Archana, K N; Sirothia, Sandeep; Ishwara-Chandra, C H

    2015-01-01T23:59:59.000Z

    We study the radio--far infrared (FIR) correlation in "blue cloud" galaxies chosen from the PRism MUltiobject Survey (PRIMUS) up to redshift ($z$) of 1.2 in the XMM-LSS field. We use rest-frame emission at 1.4 GHz in the radio and both monochromatic (at 70$\\mu$m) and bolometric (between $8-1000~\\mu$m) emission in the FIR. To probe the nature of the correlation up to $z\\sim1.2$, where direct detection of blue star-forming galaxies is impossible with current technology, we employ the technique of image stacking at 0.325 and 1.4 GHz in the radio and in six infrared bands, viz. 24, 70, 160, 250, 350 and $500~\\mu$m. For comparison, we also study the correlation for more luminous galaxies that are directly detected. The stacking analysis allows us to probe the radio--FIR correlation for galaxies that are up to 2 orders of magnitude fainter than the ones detected directly. The $k-$correction in the infrared wavebands is obtained by fitting the observed spectral energy distribution (SED) with a composite mid-IR power...

  14. Detection of long-term trends in carbon accumulation by forests in Northeastern U. S. and determination of causal factors: Final report

    SciTech Connect (OSTI)

    J. William Munger; Steven C. Wofsy; David R. Foster

    2012-01-31T23:59:59.000Z

    The overall project goal was to quantify the trends and variability for Net ecosystem exchange of CO{sub 2}, H{sub 2}O, and energy by northeastern forests, with particular attention to the role of succession, differences in species composition, legacies of past land use, and disturbances. Measurements included flux measurements and observations of biomass accumulation using ecosystem modeling as a framework for data interpretation. Continuation of the long-term record at the Environmental Measurement Site (EMS) Tower was a priority. The final quality-assured CO{sub 2}-flux data now extend through 2010. Data through 2011 are collected but not yet finalized. Biomass observations on the plot array centered on the tower are extended to 2011. Two additional towers in a hemlock stand (HEM) and a younger deciduous stand (LPH) complement the EMS tower by focusing on stands with different species composition or age distribution and disturbance history, but comparable climate and soil type. Over the period since 1993 the forest has added 24.4 Mg-C ha{sup -1} in the living trees. Annual net carbon uptake had been increasing from about 2 Mg-C ha{sup -1}y{sup -1} in the early 1990s to nearly 6 Mg-C ha{sup -1}y{sup -1} by 2008, but declined in 2009-2010. We attribute the increasing carbon uptake to a combination of warmer temperatures, increased photosynthetic efficiency, and increased influence by subcanopy hemlocks that are active in the early spring and late autumn when temperatures are above freezing but the deciduous canopy is bare. Not all of the increased carbon accumulation was found in woody biomass. Results from a study using data to optimize parameters in an ecosystem process model indicate that significant changes in model parameters for photosynthetic capacity and shifts in allocation to slow cycling soil organic matter are necessary for the model to match the observed trends. The emerging working hypothesis is that the pattern of increasing carbon uptake over the early 2000's represents a transient pulse that will eventually end as decomposition of the accumulated carbon catches up.

  15. Method of making thermally removable polyurethanes

    DOE Patents [OSTI]

    Loy, Douglas A. (Albuquerque, NM); Wheeler, David R. (Albuquerque, NM); McElhanon, James R. (Livermore, CA); Saunders, Randall S. (late of Albuquerque, NM); Durbin-Voss, Marvie Lou (Albuquerque, NM)

    2002-01-01T23:59:59.000Z

    A method of making a thermally-removable polyurethane material by heating a mixture of a maleimide compound and a furan compound, and introducing alcohol and isocyanate functional groups, where the alcohol group and the isocyanate group reacts to form the urethane linkages and the furan compound and the maleimide compound react to form the thermally weak Diels-Alder adducts that are incorporated into the backbone of the urethane linkages during the formation of the polyurethane material at temperatures from above room temperature to less than approximately 90.degree. C. The polyurethane material can be easily removed within approximately an hour by heating to temperatures greater than approximately 90.degree. C. in a polar solvent. The polyurethane material can be used in protecting electronic components that may require subsequent removal of the solid material for component repair, modification or quality control.

  16. Maleimide Functionalized Siloxane Resins

    SciTech Connect (OSTI)

    Shaltout, R.M.; Loy, D.A.; Wheeler, D.R.

    1999-04-21T23:59:59.000Z

    In-situ filling through hydrolysis and condensation of silicon alkoxides has been utilized to generate nanocomposites in which the filler phase can be intimately associated with the polymer on relatively small length scales. One problem of the method has been achieving useful fill volumes without bulk phase separation of the reacting silicon monomer from the polymer. In this paper, we describe the preparation of a new class of nanocomposite materials in which the inorganic filler phase is pre-assembled before copolymerization with an organic species. Maleimide monomers, prepared from alkoxysilylpropyl amines and maleic anhydride, were protected against side reactions by forming the oxonorbornene Diels-Alder adduct with furan. The monomers were then reacted under sol-gel conditions to form oligomers or polymers-the filler phase. The material was activated by thermal deprotection of the maleimide and reacted with organic monomers or polymers to form the filled nanocomposite.

  17. On the role of interfacial hydrogen bonds in "on-water" catalysis

    E-Print Network [OSTI]

    Kristof Karhan; Rustam Z. Khaliullin; Thomas D. Kühne

    2014-08-21T23:59:59.000Z

    Numerous experiments have demonstrated that many classes of organic reactions exhibit increased reaction rates when performed in heterogeneous water emulsions. Despite enormous practical importance of the observed "on-water" catalytic effect and several mechanistic studies, its microscopic origins remains unclear. In this work, the second generation Car-Parrinello molecular dynamics method is extended to self-consistent charge density-functional based tight-binding in order to study "on-water" catalysis of the Diels-Alder reaction between dimethyl azodicarboxylate and quadricyclane. We find that the stabilization of the transition state by dangling hydrogen bonds exposed at the aqueous interfaces plays a significantly smaller role in "on-water" catalysis than has been suggested previously.

  18. Extrusion pretreatment of sugarcane bagasse for enzymatic hydrolysis

    E-Print Network [OSTI]

    Ocana Camacho, Ronay

    1984-01-01T23:59:59.000Z

    acid; 3, Ix-L-arabinofuranose. C CH20H C H(a- CH20H HCQH HCO[CH2 ] ~ ~ HC 0 CH20H w QH l ~ OCH) \\ O CH HCOH CQ HOH2C C ~0 H CO HCOH C ? 0 HCQH H C ? IE:H C~H20H HC ~H@QH ] Ho ~ OCH3 HCOH 0 ? O 3~ QCH H2 C HOH C HC 0 2i H(OH ? 0 2, H...2CO HCOH C 0 Co w ~ OCH3 0 to~ Figure 4. Structural model for spruce lignin (Alder, 1977) CII Ch d' O 50 C/5 O CD Itl N I/5 O C' I CI I ch 'nh I Ch CC CI I/I ill O I/I Inn CC Chl O ICI Q O 05 m n5 cC CC 5- CD Ql I/I 0 Q...

  19. FIRST DETECTIONS OF THE [N II] 122 {mu}m LINE AT HIGH REDSHIFT: DEMONSTRATING THE UTILITY OF THE LINE FOR STUDYING GALAXIES IN THE EARLY UNIVERSE

    SciTech Connect (OSTI)

    Ferkinhoff, Carl; Brisbin, Drew; Nikola, Thomas; Parshley, Stephen C.; Stacey, Gordon J. [Department of Astronomy, Cornell University, Ithaca, NY 14853 (United States); Phillips, Thomas G. [California Institute of Technology, Pasadena, CA 91125 (United States); Falgarone, Edith [LERMA, CNRS, Observatoire de Paris and ENS (France); Benford, Dominic J.; Staguhn, Johannes G. [Observational Cosmology Laboratory (Code 665), NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Tucker, Carol E., E-mail: cferkinh@astro.cornell.edu [Department of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA (United Kingdom)

    2011-10-10T23:59:59.000Z

    We report the first detections of the [N II] 122 {mu}m line from a high-redshift galaxy. The line was strongly (>6{sigma}) detected from SMMJ02399-0136, and H1413+117 (the Cloverleaf QSO) using the Redshift (z) and Early Universe Spectrometer on the Caltech Submillimeter Observatory. The lines from both sources are quite bright with line to far-infrared (FIR) continuum luminosity ratios that are {approx}7.0 x 10{sup -4} (Cloverleaf) and 2.1 x 10{sup -3} (SMMJ02399). With ratios 2-10 times larger than the average value for nearby galaxies, neither source exhibits the line-to-continuum deficits seen in nearby sources. The line strengths also indicate large ionized gas fractions, {approx}8%-17% of the molecular gas mass. The [O III]/[N II] line ratio is very sensitive to the effective temperature of ionizing stars and the ionization parameter for emission arising in the narrow-line region (NLR) of an active galactic nucleus (AGN). Using our previous detection of the [O III] 88 {mu}m line, the [O III]/[N II] line ratio for SMMJ02399-0136 indicates that the dominant source of the line emission is either stellar H II regions ionized by O9.5 stars, or the NLR of the AGN with ionization parameter log(U) = -3.3 to -4.0. A composite system, where 30%-50% of the FIR lines arise in the NLR also matches the data. The Cloverleaf is best modeled by a superposition of {approx}200 M82-like starbursts accounting for all of the FIR emission and 43% of the [N II] line. The remainder may come from the NLR. This work demonstrates the utility of the [N II] and [O III] lines in constraining properties of the ionized medium.

  20. Reconstitution of sorghum grain: effects of time, temperature and moisture upon total gas production in an in vitro system

    E-Print Network [OSTI]

    Wilfong, Charlie Birch

    1969-01-01T23:59:59.000Z

    of feeding trials b cause of the costs, time and labor involved. experiment vzas designed to determine the effects of lenoth of reconstitution -' r ~c, storage temperature and moisture level upor. the total gas production of reconstituted sorghum grain... for high moisture (over 25 per- cent) ", , rain diets as compared to dry grain. Zn Vitro Fermentation In vitro st?dies are often us d to redu e feed cost in studies on fir-. d c'gestibility. They are noi, designed to duplicate tne numen and only...

  1. Experimental ferrite core circuit analysis and design applied to an analog/digital converter

    E-Print Network [OSTI]

    Hughes, Robert William

    1965-01-01T23:59:59.000Z

    EXPKRflIENTAL FERRITE CORE CIRCUIT ANALYSIS A/4i) CESIGN APPLI ED' TO AN ANALOG+I QITAL -CCWERTER I I 'O' Thaaka RCSERT, NI. LL'I AN HQQAKS:-. , ";, , '. . :. . '. -:. '"":, , ':-. ', . -' ". ' t, . I I I' I, ' . Sobalttad, ta tb ~ Qra... , Na'fir. Sabjaat& ' Eiaktr leal EnCInaaring . EXPERIIIENTAL FERRITE CORE CIRCUIT ANALYSIS AND DESIGN APPLIED TO 'AN AMALGG/DIGITAL CONVERTER f 1 A, . Thea I'a t ROBERT Wl LI. I Al'Jl. HUGHES (Goober, ) ' (Me@bar) ' A'yprived . a'o . . to a4...

  2. THE AMERICAN AG·RICULTURE MOVEMENT: MANIFEST AND LATENT PARTICIPANT ATTRACTIONS IN A SOCIAL MOVEMENT

    E-Print Network [OSTI]

    Foster, Gary S.

    1980-04-01T23:59:59.000Z

    members, interviews with . MM· :leaders and'·rIlem~ers·, participant observation .in district ·offices, and'S()()n)~dier~",e certain..advantages inherent in. the sources'ofdatautillZed~.it~ .. ~ . paper. Fir.;t" mchdata seem sufficientf..., Arkansas..· . ~~', ~.tmd: l"i.pset, S.M., Prejudice and Society t in 'Rose, A~M. and Rese, ~B. {eds.], Minority Problems, New York 1965~ 361-371. (fttst published ·hil9S9j~ Sherif~M .., and Sherif. c..w..,Social Psycholegy, ·NewYork-Bvanston-London­ Tokyo...

  3. A comparative study of the conventional diamond and cloverleaf interchanges with respect to ramp capacity and vehicular delay

    E-Print Network [OSTI]

    Barnett, James David

    2012-06-07T23:59:59.000Z

    and relative'y free f'o-. rin General Criteria 1. Tr ff'ic volu . es aad patterns 2. Costs Topography 4. Consistency of' type 5. Isaac use in vicinity cf' interse ticn 6. R~p graces Ca 0 III. Consulting Fines A. Type Use 1. Number o fir a usia... Crane count Since the fi', . hau 'oecn oxp sc? . b rate of 10 frames per second, equcticn 1 was used to deterc6ne the tr vel tiaie for each left turninC vehicle. In addition? the queue y&o iti n of e-ch vehicle was recorded. Final Frame Count...

  4. litawr It. Booklet No. 56096 Booklet Code

    E-Print Network [OSTI]

    Jayaram, Bhyravabotla

    371-47t eft RFT 374 *1749. el VV.t. tf47 Wt7T 3't 1 9F4T 947.I77 '#,37.V* et Tt wr-gr wti rer cArdia f-{ VU e161 tgig fttrw1 2. crtirmilt 3fhT 5tIc6) (ha Rift WTI 3. srt1ra-41t, ''fir 3it7 6+4, daac 4. SitilWatt .44414 .B4 ,4-44 AT Act) Trair , 2.t·r4 uIM5I4ld ?WTI Tiny r t? 1. BUT trait 2. tAc 3

  5. Modeling localized properties of E-rated laminating lumber

    E-Print Network [OSTI]

    Richburg, Brent Allen

    1989-01-01T23:59:59.000Z

    Grading Machines 94 VI. 5 Future Research 94 REFERENCES 95 APPENDIX A EXPERIMENTAL DATA . 98 B PROGRAM FOR CONVERTING RA%V CLT DATA . . 171 VITA 184 LIST OF TABLES Table Page 1 Grades and sample sizes for Douglas-fir lumber in the study. 2... this study. . 19 5 Relative frequency histograms for average, center, minimum CLT MOE, and static bending MOE for C14. . 27 6 Relative frequency histogrsms for average, center, minimum CLT MOE, and static bending MOE for 2. 3 1/6. 28 7 Relative frequency...

  6. The small firm enters international trade

    E-Print Network [OSTI]

    Steelquist, Laura McDowell

    1973-01-01T23:59:59.000Z

    be & ditcd for ~ 6] information of benefit to the, smaller fir?& engaged i;& internationai trade. ~ The Small Business Adm inis Lrat ion ' s Fx~&&rt Marl' . t ', n n' for S. &ai 3 cr &'3 rms- provides a discussion of i oreigr I 3P] market analysis... for the small business firm and is useful in this field. However, this book does not cover the foreign cultux al environment, which may be the decisive factor in marketing, and provides no information con- cerning shipp. ', ng and finance. Many trade...

  7. A linear, temperature compensated, high frequency salinity measuring device

    E-Print Network [OSTI]

    Kelly, Minton Jones

    1951-01-01T23:59:59.000Z

    :zsle tube is ohunteLL by n Eeriec con~Lenser-reaisto; cor. bin;. tian, C6, ;:. z'. 0 R3, ta maintop. in a relstively constant load. l. 't . 'On the aecillntor, The 3F ener', 'y trF nef SvrecL tbroujg. the solution and the x eaistor shunt ~asses... deter@in d, by 3ein, Fir se~orn, and. (5) '?loller (1/$5) sho;rs that it h; ?;a cz inverse curvature . . "th concentration (. 'ioure XI). The ainilcrity of these curves and the curves for sodium chlorMa aolu'tiona (. 'iCure 111) led...

  8. Depositional environment of Upper Devonian gas producing sandstones, Westmoreland County, southwestern Pennsylvania

    E-Print Network [OSTI]

    Work, Rebecca Miller

    1988-01-01T23:59:59.000Z

    for each sandstone; for each thin section, 100 monocrystalline quartz grains were counted. 37 LLOYDSVILLE SPORTSMAN ASSOCIATION I GRAIN SIZE mm 2. 0 I. O 0. 5 0. 25 O. I2 COMPOSITION /o CEM % 0 50 100 0 30 I 3I95 C Ep I I I I 3I97 FIRS T BRA... or polycrystalline as determined by the number of crystals within the quartz grain. Monocrystalline quartz is composed of a single crystal, and has simple or wavy extinction. Polycrystalline quartz contains more than one crystal within the grain. If crystals...

  9. Karl G. Jansky Very Large Array observations of cold dust and molecular gas in starbursting quasar host galaxies at z ~ 4.5

    E-Print Network [OSTI]

    Wagg, J.; Carilli, C. L.; Aravena, M.; Cox, P.; Lentati, L.; Maiolino, R.; McMahon, R. G.; Riechers, D.; Walter, F.; Andreani, P.; Hills, R.; Wolfe, A.

    2014-02-18T23:59:59.000Z

    of Cambridge, Cambridge UK 3European Southern Observatory, Casilla 19001, Santiago, Chile 4National Radio Astronomy Observatory, Socorro, USA 5Nu´cleo de Astronom?´a, Facultad de Ingenier´?a, Universidad Diego Portales, Santiago, Chile 6Joint ALMA Observatory... is supported by the detection of redshifted [CII] line emission (e.g. Maiolino et al. 2005; Stacey et al. 2010; Venemans et al. 2012; Wang et al. 2013), as this is typically the strongest cooling line in the FIR spectrum of nearby galaxies (e.g. Stacey et al...

  10. Laser for high frequency modulated interferometry

    DOE Patents [OSTI]

    Mansfield, Dennis K. (E. Windsor, NJ); Vocaturo, Michael (Columbus, NJ); Guttadora, Lawrence J. (Iselin, NJ)

    1991-01-01T23:59:59.000Z

    A Stark-tuned laser operating in the 119 micron line of CH.sub.3 OH has an output power of several tens of milliwatts at 30 Watts of pump power while exhibiting a doublet splitting of about ten MHz with the application of a Stark field on the order of 500 volts/cm. This output power allows for use of the laser in a multi-channel interferometer, while its high operating frequency permits the interferometer to measure rapid electron density changes in a pellet injected or otherwise fueled plasma such as encountered in magnetic fusion devices. The laser includes a long far-infrared (FIR) pyrex resonator tube disposed within a cylindrical water jacket and incorporating charged electrodes for applying the Stark field to a gas confined therein. With the electrodes located within the resonator tube, the resonator tube walls are cooled by a flowing coolant without electrical breakdown in the coolant liquid during application of the Stark field. Wall cooling allows for substantially increased FIR output powers. Provision is made for introducing a buffer gas into the resonator tube for increasing laser output power and its operating bandwidth.

  11. Accelerator Sources for THz science: A Review

    SciTech Connect (OSTI)

    Neil, George R. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

    2014-01-01T23:59:59.000Z

    Free Electron Lasers have been around since 1977 providing not only a test bed for the physics of FELs and electron/photon interactions but as a workhorse of scientific research. More than 30 FELs are presently operating around the world spanning a wavelength range from the millimeter region to the hard x-ray using direct current and rf linear accelerators or storage rings as electron sources. The characteristics that have driven the development of these sources are the desire for high peak and average power, high micropulse energies, wavelength tunability, timing flexibility, and wavelengths that are unavailable from more conventional laser sources. Operation of FELs in the far infrared to terahertz regime poses special challenges which have been and are being addressed at a number of facilities around the world. This paper will review a number of former and existing FELs operating in this regime and discuss future efforts. Broadband collective radiation from relativistic electrons also plays a significant role in the production of FIR/THz radiation and several groups are taking advantage of this source for users. Applications for use of the radiation have evolved from simple imaging to complex pump probe tests of insulator/metal transitions and energy flow in organic molecules. We will discuss the technologies for generating the IR/FIR/THz radiation and cover some of the unique applications of such sources.

  12. THE STAR FORMATION LAW AT LOW SURFACE DENSITY

    SciTech Connect (OSTI)

    Wyder, Ted K.; Martin, D. Christopher; Barlow, Tom A.; Foster, Karl; Friedman, Peter G.; Morrissey, Patrick; Neill, James D. [California Institute of Technology, MC 278-17, 1200 E. California Blvd., Pasadena, CA 91125 (United States); Neff, Susan G. [Laboratory for Astronomy and Solar Physics, NASA Goddard Space Flight Center, Greenbelt, MD, 20771 (United States); Schiminovich, David [Department of Astronomy, Columbia University, New York, NY 10027 (United States); Seibert, Mark; Madore, Barry F. [Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91101 (United States); Bianchi, Luciana [Center for Astrophysical Sciences, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218 (United States); Donas, Jose; Milliard, Bruno [Laboratoire d'Astrophysique de Marseille, BP 8, Traverse du Siphon, 13376 Marseille Cedex 12 (France); Heckman, Timothy M.; Szalay, Alex S. [Department of Physics and Astronomy, Johns Hopkins University, Homewood Campus, Baltimore, MD 21218 (United States); Lee, Young-Wook; Yi, Sukyoung K. [Center for Space Astrophysics, Yonsei University, Seoul 120-749 (Korea, Republic of); Rich, R. Michael [Department of Physics and Astronomy, University of California, Los Angeles, CA 90095 (United States)

    2009-05-10T23:59:59.000Z

    We investigate the nature of the star formation law at low gas surface densities using a sample of 19 low surface brightness (LSB) galaxies with existing H I maps in the literature, UV imaging from the Galaxy Evolution Explorer satellite, and optical images from the Sloan Digital Sky Survey. All of the LSB galaxies have (NUV - r) colors similar to those for higher surface brightness star-forming galaxies of similar luminosity indicating that their average star formation histories are not very different. Based upon four LSB galaxies with both UV and far-infrared (FIR) data, we find FIR/UV ratios significantly less than 1, implying low amounts of internal UV extinction in LSB galaxies. We use the UV images and H I maps to measure the star formation rate (SFR) and hydrogen gas surface density within the same region for all the galaxies. The LSB galaxy star formation rate surface densities lie below the extrapolation of the power law fit to the SFR surface density as a function of the total gas density for higher surface brightness galaxies. Although there is more scatter, the LSB galaxies also lie below a second version of the star formation law in which the SFR surface density is correlated with the gas density divided by the orbital time in the disk. The downturn seen in both star formation laws is consistent with theoretical models that predict lower star formation efficiencies in LSB galaxies due to the declining molecular fraction with decreasing density.

  13. An upper limit to [C II] emission in a z ~= 5 galaxy

    E-Print Network [OSTI]

    Gaelen Marsden; Colin Borys; Scott C. Chapman; Mark Halpern; Douglas Scott

    2005-03-02T23:59:59.000Z

    Low-ionization-state far-infrared (FIR) emission lines may be useful diagnostics of star-formation activity in young galaxies, and at high redshift may be detectable from the ground. In practice, however, very little is known concerning how strong such line emission might be in the early Universe. We attempted to detect the 158 micron [C II] line from a lensed galaxy at z = 4.926 using the Caltech Submillimeter Observatory. This source is an ordinary galaxy, in the sense that it shows high but not extreme star formation, but lensing makes it visible. Our analysis includes a careful consideration of the calibrations and weighting of the individual scans. We find only modest improvement over the simpler reduction methods, however, and the final spectrum remains dominated by systematic baseline ripple effects. We obtain a 95 per cent confidence upper limit of 33 mJy for a 200 km/s full width at half maximum line, corresponding to an unlensed luminosity of 1x10^9 L_sun for a standard cosmology. Combining this with a marginal detection of the continuum emission using the James Clerk Maxwell Telescope, we derive an upper limit of 0.4 per cent for the ratio of L_CII/L_FIR in this object.

  14. Prediction of the heat release rate of wood

    SciTech Connect (OSTI)

    Parker, W.J.

    1988-01-01T23:59:59.000Z

    A model for the heat release rate of wood during flaming combustion was developed during this research. It includes the effects of char shrinkage, multiple chemical components, adsorbed moisture, internal convective cooling and the variation of the thermophysical and thermochemical properties with temperature and the mass retention fraction of the char. It does not include char oxidation or diffusion of moisture and volatile pyrolysis products toward the rear surface. It calculates the time to ignition, mass burning rate, heat release rate, heat of combustion, heat of gasification and depth of char. An important part of this research was the determination of the thermochemical and thermophysical properties required by the model. An apparatus was developed for determining the kinetic parameters and the heat of combustion of the volatiles under conditions similar to those in the interior of a flaming slab of wood. Data were obtained on each of the four major chemical components present in Douglas fir. Thermal diffusivity measurements on Douglas fir and its char yielded an average value of 2.1 {times} 10{sup {minus}7} s{sup 2}/s which was nearly independent of temperature and mass retention fraction of the char for temperature sup to 500{degree}C and for mass-retention fractions above 0.30.

  15. New polymorphous computing fabric.

    SciTech Connect (OSTI)

    Wolinski, C. (Christophe); Gokhale, M. (Maya); McCabe, K. P. (Kevin P.)

    2002-01-01T23:59:59.000Z

    This paper introduces a new polymorphous computing Fabric well suited to DSP and Image Processing and describes its implementation on a Configurable System on a Chip (CSOC). The architecture is highly parameterized and enables customization of the synthesized Fabric to achieve high performance for a specific class of application. For this reason it can be considered to be a generic model for hardware accelerator synthesis from a high level specification. Another important innovation is the Fabric uses a global memory concept, which gives the host processor random access to all the variables and instructions on the Fabric. The Fabric supports different computing models including MIMD, SPMD and systolic flow and permits dynamic reconfiguration. We present a specific implementation of a bank of FIR filters on a Fabric composed of 52 cells on the Altera Excalibur ARM running at 33 MHz. The theoretical performance of this Fabric is 1.8 GMACh. For the FIR application we obtain 1.6 GMAC/s real performance. Some automatic tools have been developed like the tool to provide a host access utility and assembler.

  16. Astrophysics of Dust in Cold Clouds

    E-Print Network [OSTI]

    B. T. Draine

    2003-04-28T23:59:59.000Z

    Nine lectures reviewing the astrophysics of dust in interstellar clouds. Topics include: (1) Summary of observational evidence concerning interstellar dust: broadband extinction, scattering of starlight, polarization of starlight, spectroscopy of dust, IR and FIR emission, and depletions of grain-forming elements. (2) Optics of interstellar dust grains: dielectric functions of nonconducting and conducting materials, calculational techniques, formulae valid in the Rayleigh limit, Kramers-Kronig relations, microwave emission mechanisms, and X-ray scattering. (3) IR and FIR emission: heating of interstellar dust, including single-photon heating, and resulting IR emission spectrum. (4) Charging of dust grains: collisional charging, photoelectric emission, and resulting charge distribution functions. (5) Dynamics: gas drag, Lorentz force, forces due to anisotropic radiation, and resulting drift velocities. (6) Rotational dynamics: brownian rotation, suprathermal rotation, and effects of starlight torques. (7) Alignment of interstellar dust: observations and theories. (8) Evolution of the grain population: dust formation in outflows, grain growth in the ISM, photodesorption, and grain destruction in shock waves. (9) Effects of dust grains: photoelectric heating, H2 formation, ion recombination, coupling of gas to magnetic fields, and dust grains as indicators of magnetic field direction.

  17. Insights into gas heating and cooling in the disc of NGC 891 from Herschel far-infrared spectroscopy

    E-Print Network [OSTI]

    Hughes, T M; Schirm, M R P; Parkin, T J; De Looze, I; Wilson, C D; Bendo, G J; Baes, M; Fritz, J; Boselli, A; Cooray, A; Cormier, D; Karczewski, O ?; Lebouteiller, V; Lu, N; Madden, S C; Spinoglio, L; Viaene, S

    2014-01-01T23:59:59.000Z

    We present Herschel PACS and SPIRE spectroscopy of the most important far-infrared cooling lines in the nearby edge-on spiral galaxy, NGC 891: [CII] 158 $\\mu$m, [NII] 122, 205 $\\mu$m, [OI] 63, 145 $\\mu$m, and [OIII] 88 $\\mu$m. We find that the photoelectric heating efficiency of the gas, traced via the ([CII]+[OII]63)/$F_{\\mathrm{TIR}}$ ratio, varies from a mean of 3.5$\\times$10$^{-3}$ in the centre up to 8$\\times$10$^{-3}$ at increasing radial and vertical distances in the disc. A decrease in ([CII]+[OII]63)/$F_{\\mathrm{TIR}}$ but constant ([CII]+[OI]63)/$F_{\\mathrm{PAH}}$ with increasing FIR colour suggests that polycyclic aromatic hydrocarbons (PAHs) may become important for gas heating in the central regions. We compare the observed flux of the FIR cooling lines and total IR emission with the predicted flux from a PDR model to determine the gas density, surface temperature and the strength of the incident far-ultraviolet (FUV) radiation field, $G_{0}$. Resolving details on physical scales of ~0.6 kpc, a p...

  18. Laser for high frequency modulated interferometry

    DOE Patents [OSTI]

    Mansfield, D.K.; Vocaturo, M.; Guttadora, L.J.

    1991-07-23T23:59:59.000Z

    A Stark-tuned laser operating in the 119 micron line of CH[sub 3]OH has an output power of several tens of milliwatts at 30 Watts of pump power while exhibiting a doublet splitting of about ten MHz with the application of a Stark field on the order of 500 volts/cm. This output power allows for use of the laser in a multi-channel interferometer, while its high operating frequency permits the interferometer to measure rapid electron density changes in a pellet injected or otherwise fueled plasma such as encountered in magnetic fusion devices. The laser includes a long far-infrared (FIR) pyrex resonator tube disposed within a cylindrical water jacket and incorporating charged electrodes for applying the Stark field to a gas confined therein. With the electrodes located within the resonator tube, the resonator tube walls are cooled by a flowing coolant without electrical breakdown in the coolant liquid during application of the Stark field. Wall cooling allows for substantially increased FIR output powers. Provision is made for introducing a buffer gas into the resonator tube for increasing laser output power and its operating bandwidth. 10 figures.

  19. Final report on "Modeling Diurnal Variations of California Land Biosphere CO2 Fluxes"

    SciTech Connect (OSTI)

    Fung, Inez

    2014-07-28T23:59:59.000Z

    In Mediterranean climates, the season of water availability (winter) is out of phase with the season of light availability and atmospheric demand for moisture (summer). Multi-year half-hourly observations of sap flow velocities in 26 evergreen trees in a small watershed in Northern California show that different species of evergreen trees have different seasonalities of transpiration: Douglas-firs respond immediately to the first winter rain, while Pacific madrones have peak transpiration in the dry summer. Using these observations, we have derived species-specific parameterization of normalized sap flow velocities in terms of insolation, vapor pressure deficit and near-surface soil moisture. A simple 1-D boundary layer model showed that afternoon temperatures may be higher by 1 degree Celsius in an area with Douglas-firs than with Pacific madrones. The results point to the need to develop a new representation of subsurface moisture, in particular pools beneath the organic soil mantle and the vadose zone. Our ongoing and future work includes coupling our new parameterization of transpiration with new representation of sub-surface moisture in saprolite and weathered bedrock. The results will be implemented in a regional climate model to explore vegetation-climate feedbacks, especially in the dry season.

  20. Star formation in z>1 3CR host galaxies as seen by Herschel

    E-Print Network [OSTI]

    Podigachoski, P; Haas, M; Leipski, C; Wilkes, B; Kuraszkiewicz, J; Westhues, C; Willner, S P; Ashby, M L N; Chini, R; Clements, D L; Fazio, G G; Labiano, A; Lawrence, C; Meisenheimer, K; Peletier, R F; Siebenmorgen, R; Kleijn, G Verdoes

    2015-01-01T23:59:59.000Z

    We present Herschel (PACS and SPIRE) far-infrared (FIR) photometry of a complete sample of z>1 3CR sources, from the Herschel GT project The Herschel Legacy of distant radio-loud AGN (PI: Barthel). Combining these with existing Spitzer photometric data, we perform an infrared (IR) spectral energy distribution (SED) analysis of these landmark objects in extragalactic research to study the star formation in the hosts of some of the brightest active galactic nuclei (AGN) known at any epoch. Accounting for the contribution from an AGN-powered warm dust component to the IR SED, about 40% of our objects undergo episodes of prodigious, ULIRG-strength star formation, with rates of hundreds of solar masses per year, coeval with the growth of the central supermassive black hole. Median SEDs imply that the quasar and radio galaxy hosts have similar FIR properties, in agreement with the orientation-based unification for radio-loud AGN. The star-forming properties of the AGN hosts are similar to those of the general popul...

  1. Supercritical fluid reactions for coal processing. Quarterly progress report, July 1, 1995--September 30, 1995

    SciTech Connect (OSTI)

    Eckert, C.A

    1995-12-31T23:59:59.000Z

    The goal of this work is to design benign solvent/cosolvent systems for reactions which will achieve optimum desulfurization and/or denitrogenation in the pre-treatment of coal or coal liquids. Supercritical fluids present excellent opportunities for the pretreatment of coal, hence we shall utilize supercritical fluids as a reaction medium. A number of possible Diels-Alder reactive systems involving anthracene (diene) in supercritical solvent were proposed at the outset of research. Scouting experiments designed to select out the optimum reactive system from among the candidate dienophiles and solvents have been completed. The nitrogen bearing compound 4-phenyl-1,2,4-triazoline-3,5-dione (PTAD) has demonstrated superior reactivity and sensitivity to cosolvent additions and has been selected as dienophile. A convenient half-life of reaction between PTAD and anthracene is obtained at temperatures in the neighborhood of 50{degree}C. Carbon dioxide has been selected as the solvent because of its convenient critical properties, and also to optimize the safety of the experiments. In the process of completing these scouting experiments, the experimental apparatus that will be used to obtain kinetic data for calculation of partial molar volumes of the reaction transition state has also been optimized.

  2. Novel Diblock Copolymer-Grafted Multiwalled Carbon Nanotubes via a combination of Living and Controlled/Living Surface Polymerizations

    SciTech Connect (OSTI)

    Priftis, Dimitrios [ORNL; Sakellariou, Georgios [ORNL; Mays, Jimmy [University of Tennessee, Knoxville (UTK); Hadjichristidis, Nikos [University of Athens, Athens, Greece

    2010-01-01T23:59:59.000Z

    Diels Alder cycloaddition reactions were used to functionalize multiwalled carbon nanotubes (MWNTs) with 1-benzocylcobutene-10-phenylethylene (BCB-PE) or 4-hydroxyethylbenzocyclobutene (BCB-EO). The covalent functionalization of the nanotubes with these initiator precursors was verified by FTIR and thermogravimetric analysis (TGA). After appropriate transformations/additions, the functionalized MWNTs were used for surface initiated anionic and ring opening polymerizations of ethylene oxide and e-caprolactone (e-CL), respectively. The OH-end groups were transformed to isopropylbromide groups by reaction with 2-bromoisobutyryl bromide, for subsequent atom transfer radical polymerization of styrene or 2-dimethylaminoethyl methacrylate to afford the final diblock copolymers. 1H NMR, differential scanning calorimetry (DSC), TGA, and transmission electron microscopy (TEM) were used for the characterization of the nanocomposite materials. TEM images showed the presence of a polymer layer around the MWNTs as well as the dissociation of MWNT bundles. Consequently, this general methodology, employing combinations of different polymerization techniques, increases the diversity of diblocks that can be grafted from MWNTs.

  3. Surface-Initiated Titanium-Mediated Coordination Polymerization from Catalyst-Functionalized Single and Multiwalled Carbon Nanotubes

    SciTech Connect (OSTI)

    Priftis, Dimitrios [ORNL; Petzetakis, Nikolaos [University of Athens, Athens, Greece; Sakellariou, Georgios [ORNL; Pitsikalis, Marinos [ORNL; Baskaran, Durairaj [University of Tennessee, Knoxville (UTK); Mays, Jimmy [ORNL; Hadjichristidis, Nikos [University of Athens, Athens, Greece

    2009-01-01T23:59:59.000Z

    Single (SWNTs) and multiwalled (MWNTs) carbon nanotubes were functionalized with a titanium alkoxide catalyst through a Diels-Alder cycloaddition reaction. The catalyst-functionalized carbon nanotubes (CNTs) were used for the surface initiated titanium-mediated coordination polymerizations of L-lactide (L-LA), -caprolactone (-CL) and n-hexyl isocyanate (HIC) employing the grafting from technique. 1H NMR, IR and Raman spectra showed that the precursor catalyst was successfully synthesized and covalently attached on the CNTs surface. Thermogravimetric analysis (TGA) revealed that the grafted poly(L-lactide) (PLLA) content could be controlled with time. The final polymer-grafted CNTs were readily dissolved in organic solvents as compared to the insoluble pristine and catalyst-functionalized CNTs. The presence of thick layers of polymers around the CNTs was observed through transmission electron microscopy (TEM). Differential scanning calorimetry (DSC) proved that the glass transition (Tg) and melting (Tm) temperatures of the PLLA are affected by the presence of the CNTs, while PLLA R-helix conformation remains intact, as revealed by the circular dichroism (CD) spectra.

  4. Polymer Grafted Janus Multi-Walled Carbon Nanotubes

    SciTech Connect (OSTI)

    Priftis, Dimitrios [ORNL; Sakellariou, Georgios [ORNL; Baskaran, Durairaj [University of Tennessee, Knoxville (UTK); Mays, Jimmy [ORNL; Hadjichristidis, Nikos [University of Athens, Athens, Greece

    2009-01-01T23:59:59.000Z

    We describe a novel and facile strategy to modify the surface of carbon nanotubes (CNTs) with two chemically different polymer brushes utilizing the grafting from technique. A [4 + 2] Diels Alder cycloaddition reaction was used to functionalize multi-walled carbon nanotubes (MWNTs) with two different precursor initiators, one for ring opening polymerization (ROP) and one for atom transfer radical polymerization (ATRP). The binary functionalized MWNTs were used for the simultaneous surface initiated polymerizations of different monomers resulting in polymer grafted MWNTs that can form Janus type structures under appropriate conditions. 1H NMR, FTIR and Raman spectra showed that the precursor initiators were successfully synthesized and covalently attached on the CNT surface. Thermogravimetric analysis (TGA) revealed that the grafted polymer content varies when different monomer ratios and polymerization times are used. The presence of an organic layer around the CNTs was observed through transmission electron microscopy (TEM). Differential scanning calorimetry (DSC) proved that the glass transition (Tg) and melting (Tm) temperatures of the grafted polymers are affected by the presence of the CNTs, while circular dichroism (CD) spectra indicated that the PLLA ahelix conformation remains intact.

  5. The application of soft X-ray microscopy to the in-situ analysis of sporopollenin/sporinite in a rank variable suite of organic rich sediments

    SciTech Connect (OSTI)

    Cody, G.D.; Botto, R.E. [Argonne National Lab., IL (United States). Chemistry Div.; Ade, H. [North Carolina State Univ., Raleigh, NC (United States). Dept. of Physics; Wirick, S. [State Univ. of New York, Stony Brook, NY (United States). Dept. of Physics

    1997-07-01T23:59:59.000Z

    Soft X-ray imaging and carbon near edge absorption fine structure spectroscopy (C-NEXAFS) has been used for the in-situ analysis of sporinite in a rank variable suite of organic rich sediments extending from recent up to high volatile A bituminous coal. The acquisition of chemically based images (contrast based on the 1s - 1{pi}* transition of unsaturated carbon), revealed a homogeneous chemical structure in the spore exine. C-NEXAFS microanalysis indicates chemical structural evolution in sporopollenin/sporinite with increases in maturation. The most significant change in the C-NEXAFS spectrum is an increase in unsaturated carbon, presumably aromatic, with rank. The rate of aromatization in sporinite exceeds that of the surrounding vitrinite. Increases in the concentration of unsaturated carbon are compensated by losses of aliphatic and hydroxylated aliphatic carbon components. Carboxyl groups are present in low and variable concentrations. Absorption due to carboxyl persists in the most mature specimen in this series, a high volatile A rank coal. The reactions which drive sporopollenin chemical structural evolution during diagenesis presumably involve dehydration, Diels-Alder cyclo-addition, and dehydrogenation reactions which ultimately lead to a progressively aromatized bio/geopolymer.

  6. High-intensity drying processes: Impulse drying. Annual report

    SciTech Connect (OSTI)

    Orloff, D.I.; Phelan, P.M.

    1993-12-01T23:59:59.000Z

    Experiments were conducted on a sheet-fed pilot-scale shoe press to compare impulse drying and double-felted pressing. Both an IPST (Institute of Paper Science and Technology) ceramic coated and Beloit Type A press roll were evaluated for lienrboard sheet structures having a wide range of z-direction permeability. Purpose was to find ways of correcting sheet sticking problems observed in previous pilot-scale shoe press experiments. Results showed that impulse drying was superior to double felted pressing in both press dryness and in important paper physical properties. Impulse drying critical temperature was found to depend on specific surface of the heated layer of the sheet, thermal properties of the press roll surface, and choice of felt. Impulse drying of recycled and two-ply liner was demonstrated for both Southern Pile and Douglas fir-containing furnishes.

  7. LIQUID PROPANE GAS (LPG) STORAGE AREA BOILING LIQUID EXPANDING VAPOR EXPLOSION (BLEVE) ANALYSIS

    SciTech Connect (OSTI)

    PACE, M.E.

    2004-01-13T23:59:59.000Z

    The PHA and the FHAs for the SWOC MDSA (HNF-14741) identified multiple accident scenarios in which vehicles powered by flammable gases (e.g., propane), or combustible or flammable liquids (e.g., gasoline, LPG) are involved in accidents that result in an unconfined vapor cloud explosion (UVCE) or in a boiling liquid expanding vapor explosion (BLEVE), respectively. These accident scenarios are binned in the Bridge document as FIR-9 scenarios. They are postulated to occur in any of the MDSA facilities. The LPG storage area will be in the southeast corner of CWC that is relatively remote from store distaged MAR. The location is approximately 30 feet south of MO-289 and 250 feet east of 2401-W by CWC Gate 10 in a large staging area for unused pallets and equipment.

  8. Net energy for production of feed mixtures containing various levels of cottonseed hulls and coastal bermudagrass hay

    E-Print Network [OSTI]

    Mark, William Howard

    2012-06-07T23:59:59.000Z

    !'er 16&]966) I3zeT(s'1! 2d I' f. lect r I !, cve1 o Cotto'i. ee ' Hu]! I r v!1s on Dai ly Yr'crl In I ai:u (d!i . 13 t o 0c tone 10 & 19r&6) Br. e&r le, Te;ras ?5 fir:eac ariel Cl aclraLic Ile irr . sion for id!e Ef tc;!ts of travel of li &ur&hage re...!ci sc o&1s 'or tji. 6 f -;!! s of (oas! r!I Be& ai!d; . ass Bay I rvel or! Inc. gy 6 . i! Cos Treat&!, ent Gi oiips (du e 13 ? Ceto! er . ' 6. 1966 ? Ber v' i Le) . B5 IC! I&i!se!r e&nr! Clued&cetic Renre. , sions fo" tlie Eff acts of Cot& t...

  9. Discrete time robust control systems under structured perturbations: stability manifolds and extremal properties

    E-Print Network [OSTI]

    Tin, Marie-Lyne Appoline

    1992-01-01T23:59:59.000Z

    rit irlrrl thrff thr ar rrrfq is cegnlnr, i. rf. , d?g 0 7/ 7. fhf n Pj =) has nn Iftnf on fhr cff'r'le, affd there nic h rvot. Inifrle and n ? h r'ovfs out'i de flic unit rlfsl jc ( 1. Ic'? fe I' r. ' f fir nu7fibe'I' fif nrf/I'Ifll'r pl'(7rfncf... v, liole I'a?&il& i& e&lu&&al& n& to ih& stability of i ape& ial subs&& of it?xpo?cl &dg& s. & sile&i t lic 1. '-& d & ~ l "&: i. /& = 1. . . . /l. Ifarl&ab and J&ir& &'I& & x&& &id?l &l&i~ i&sul& to line? i&i&& rval ??i&&el s, -&n?s. Co?- 21...

  10. Autothermal reforming catalyst having perovskite structure

    DOE Patents [OSTI]

    Krumpel, Michael (Naperville, IL); Liu, Di-Jia (Naperville, IL)

    2009-03-24T23:59:59.000Z

    The invention addressed two critical issues in fuel processing for fuel cell application, i.e. catalyst cost and operating stability. The existing state-of-the-art fuel reforming catalyst uses Rh and platinum supported over refractory oxide which add significant cost to the fuel cell system. Supported metals agglomerate under elevated temperature during reforming and decrease the catalyst activity. The catalyst is a perovskite oxide or a Ruddlesden-Popper type oxide containing rare-earth elements, catalytically active firs row transition metal elements, and stabilizing elements, such that the catalyst is a single phase in high temperature oxidizing conditions and maintains a primarily perovskite or Ruddlesden-Popper structure under high temperature reducing conditions. The catalyst can also contain alkaline earth dopants, which enhance the catalytic activity of the catalyst, but do not compromise the stability of the perovskite structure.

  11. Final Progress Report on Model-Based Diagnosis of Soil Limitations to Forest Productivity

    SciTech Connect (OSTI)

    Luxmoore, R.J.

    2004-08-30T23:59:59.000Z

    This project was undertaken in support of the forest industry to link modeling of nutrients and productivity with field research to identify methods for enhancing soil quality and forest productivity and for alleviating soil limitations to sustainable forest productivity. The project consisted of a series of related tasks, including (1) simulation of changes in biomass and soil carbon with nitrogen fertilization, (2) development of spreadsheet modeling tools for soil nutrient availability and tree nutrient requirements, (3) additional modeling studies, and (4) evaluation of factors involved in the establishment and productivity of southern pine plantations in seasonally wet soils. This report also describes the two Web sites that were developed from the research to assist forest managers with nutrient management of Douglas-fir and loblolly pine plantations.

  12. A Comparative Survey of the Sting of Aculeate Hymenoptera

    E-Print Network [OSTI]

    Daly, Howell V.

    1955-01-01T23:59:59.000Z

    s a s &-s a s a s § s f ! 8 i s s» aas s • CO » 00 4* • ! mm m mm mR i S s : d ti PT4& P*4F GIß PF-P g * s* I « M O S O © • 8>O too 1 1 1 s i . CO i « I l 0 3 1 5 H 3 ' if < TH ft • HI IS 03 i l J 1 I Specimens for dissection...• Rietache1 (1937) observed low rasp-like ridges subapteally on the fir at valvulae in the Ichneumonld. Ophlon, and en both 23, valvulae In Palthyrue vsstslls (Four er or) end Jfyxmsjßia.« This survsy adde Trypoxylon »nd Psoudomyrac» %o -thle lat­ ter...

  13. On the prediction of far field computational aeroacoustics of advanced propellers

    E-Print Network [OSTI]

    Jaeger, Stephen Mark

    1990-01-01T23:59:59.000Z

    by the following expressions: 10 4. P, (?, t) = ? J' . drd. cI f p a V? at Jt=o It sin vR g=g (4) 4 P, '(, , t) = ? J, dl'd + J, dpd (5) f lR f a lR ot Jt=o RsinvR Jt=o fir sin vR O=O g=g where r is the source time, t, is the observer time and vR is the angle.... : r)P e ? = ? 7' P. cits p (28) This equation describes the propagation of small amplitude pressure waves. By comparing Equation (28) to the wave equation in terms of 4, it is noted that the equations are analogous if a = e/p. This will be true...

  14. OBSERVATIONS OF Arp 220 USING HERSCHEL-SPIRE: AN UNPRECEDENTED VIEW OF THE MOLECULAR GAS IN AN EXTREME STAR FORMATION ENVIRONMENT

    SciTech Connect (OSTI)

    Rangwala, Naseem; Maloney, Philip R.; Glenn, Jason; Kamenetzky, Julia [Center for Astrophysics and Space Astronomy, University of Colorado, 1255 38th street, Boulder, CO 80303 (United States); Wilson, Christine D.; Mentuch, Erin; Schirm, Maximilien R. P. [Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1 (Canada); Rykala, Adam [School of Physics and Astronomy, Cardiff University, Queens Buildings The Parade, Cardiff CF24 3AA (United Kingdom); Isaak, Kate [ESA Astrophysics Missions Division, ESTEC, PO Box 299, 2200 AG Noordwijk (Netherlands); Baes, Maarten [Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, B-9000 Gent (Belgium); Bendo, George J. [UK ALMA Regional Centre Node, Jordell Bank Center for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL (United Kingdom); Boselli, Alessandro [Laboratoire d'Astrophysique de Marseille, UMR6110 CNRS, 38 rue F. Joliot-Curie, F-13388 Marseille (France); Bradford, Charles M. [JPL, Pasadena, CA 91109 (United States); Clements, D. L. [Astrophysics Group, Imperial College, Blackett Laboratory, Prince Consort Road, London SW7 2AZ (United Kingdom); Cooray, Asantha [Department of Physics and Astronomy, University of California, Irvine, CA 92697 (United States); Fulton, Trevor; Imhof, Peter [Blue Sky Spectroscopy Inc, Suite 9-740 4th Avenue South, Lethbridge, Alberta T1J 0N9 (Canada); Madden, Suzanne C.; Sauvage, Marc [CEA, Laboratoire AIM, Irfu/SAp, Orme des Merisiers, F-91191 Gif-sur-Yvette (France); Sacchi, Nicola [Istituto di Fisica dello Spazio Interplanetario, INAF, Via del Fosso del Cavaliere 100, I-00133 Roma (Italy); and others

    2011-12-10T23:59:59.000Z

    We present Herschel Spectral and Photometric Imaging Receiver Fourier Transform Spectrometer (Herschel SPIRE-FTS) observations of Arp 220, a nearby ultra-luminous infrared galaxy. The FTS provides continuous spectral coverage from 190 to 670 {mu}m, a wavelength region that is either very difficult to observe or completely inaccessible from the ground. The spectrum provides a good measurement of the continuum and detection of several molecular and atomic species. We detect luminous CO (J = 4-3 to 13-12) and water rotational transitions with comparable total luminosity {approx}2 Multiplication-Sign 10{sup 8} L{sub Sun }; very high-J transitions of HCN (J = 12-11 to 17-16) in absorption; strong absorption features of rare species such as OH{sup +}, H{sub 2}O{sup +}, and HF; and atomic lines of [C I] and [N II]. The modeling of the continuum shows that the dust is warm, with T = 66 K, and has an unusually large optical depth, with {tau}{sub dust} {approx} 5 at 100 {mu}m. The total far-infrared luminosity of Arp 220 is L{sub FIR} {approx} 2 Multiplication-Sign 10{sup 12} L{sub Sun }. Non-LTE modeling of the extinction corrected CO rotational transitions shows that the spectral line energy distribution of CO is fit well by two temperature components: cold molecular gas at T {approx} 50 K and warm molecular gas at T {approx} 1350{sup +280}{sub -100} K (the inferred temperatures are much lower if CO line fluxes are not corrected for dust extinction). These two components are not in pressure equilibrium. The mass of the warm gas is 10% of the cold gas, but it dominates the CO luminosity. The ratio of total CO luminosity to the total FIR luminosity is L{sub CO}/L{sub FIR} {approx} 10{sup -4} (the most luminous lines, such as J = 6-5, have L{sub CO,J=6-5}/L{sub FIR} {approx} 10{sup -5}). The temperature of the warm gas is in excellent agreement with the observations of H{sub 2} rotational lines. At 1350 K, H{sub 2} dominates the cooling ({approx}20 L{sub Sun} M{sup -1}{sub Sun }) in the interstellar medium compared to CO ({approx}0.4 L{sub Sun} M{sup -1}{sub Sun }). We have ruled out photodissociation regions, X-ray-dominated regions, and cosmic rays as likely sources of excitation of this warm molecular gas, and found that only a non-ionizing source can heat this gas; the mechanical energy from supernovae and stellar winds is able to satisfy the large energy budget of {approx}20 L{sub Sun} M{sup -1}{sub Sun }. Analysis of the very high-J lines of HCN strongly indicates that they are solely populated by infrared pumping of photons at 14 {mu}m. This mechanism requires an intense radiation field with T > 350 K. We detect a massive molecular outflow in Arp 220 from the analysis of strong P Cygni line profiles observed in OH{sup +}, H{sub 2}O{sup +}, and H{sub 2}O. The outflow has a mass {approx}> 10{sup 7} M{sub Sun} and is bound to the nuclei with velocity {approx}< 250 km s{sup -1}. The large column densities observed for these molecular ions strongly favor the existence of an X-ray luminous AGN (10{sup 44} erg s{sup -1}) in Arp 220.

  15. THE NATURE OF THE SECOND PARAMETER IN THE IRX-{beta} RELATION FOR LOCAL GALAXIES

    SciTech Connect (OSTI)

    Grasha, Kathryn; Calzetti, Daniela; Andrews, Jennifer E. [Astronomy Department, University of Massachusetts, Amherst, MA 01003 (United States); Lee, Janice C. [STScI, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Dale, Daniel A., E-mail: kgrasha@astro.umass.edu [Department of Physics, University of Wyoming, Laramie, WY 82071 (United States)

    2013-08-20T23:59:59.000Z

    We present an analysis of 98 galaxies of low-dust content, selected from the Spitzer Local Volume Legacy survey, aimed at examining the relation between the ultraviolet (UV) color and dust attenuation in normal star-forming galaxies. The IRX-{beta} diagram relates the total dust attenuation in a galaxy, traced by the far-IR (FIR) to UV ratio, to the observed UV color, indicated by {beta}. Previous research has indicated that while starburst galaxies exhibit a relatively tight IRX-{beta} relation, normal star-forming galaxies do not, and have a much larger spread in the total-IR to far-UV (FUV) luminosity for a fixed UV color. We examine the role that the age of the stellar population plays as the ''second parameter'' responsible for the observed deviation and spread of star-forming galaxies from the starburst relation. We model the FUV to FIR spectral energy distribution of each galaxy according to two broad bins of star formation history (SFH): constant and instantaneous burst. We find clear trends between stellar population mean age estimators (extinction-corrected FUV/NIR, U - B, and EW(H{alpha})) and the UV color {beta}; the trends are mostly driven by the galaxies best-described by instantaneous burst populations. We also find a significant correlation between {beta} and the mean age directly determined from the best-fit instantaneous models. As already indicated by other authors, the UV attenuation in star-forming galaxies may not be recovered with the UV color alone and is highly influenced by the stellar population's mean age and SFH. Overall, the scatter in the IRX-{beta} diagram is better correlated with {beta} than with the perpendicular distance, d{sub p}.

  16. High conversion Th-U{sup 233} fuel assembly for current generation of PWRs

    SciTech Connect (OSTI)

    Baldova, D.; Fridman, E. [Reactor Safety Div., Helmholtz-Zentrum Dresden-Rossendorf, POB 510119, Dresden, 01314 (Germany)

    2012-07-01T23:59:59.000Z

    This paper presents a preliminary design of a high conversion Th-U{sup 233} fuel assembly applicable for current generation of Pressurized Water Reactor (PWRs). The considered fuel assembly has a typical 17 x 17 PWR lattice. However in order to increase the conversion of Th{sup 232} to U{sup 233}, the assembly was subdivided into the two regions called seed and blanket. The central seed region has a higher than blanket U{sup 233} content and acts as a neutron source for the peripheral blanket region. The latest acts as a U{sup 233} breeder. While the seed fuel pins have a standard dimensions the blanket fuel radius was increased in order to reduce the moderation and to facilitate the resonance neutron absorption in blanket Th{sup 232}. The U{sup 233} content in the seed and blanket regions was optimized to achieve maximal initial to discharged fissile inventory ratio (FIR) taking into account the target fuel cycle length of 12 months with 3-batch reloading scheme. In this study the neutronic calculations were performed on the fuel assembly level using Helios deterministic lattice transport code. The fuel cycle length and the core k{sub eff} were estimated by applying the Non Linear Reactivity Model. The applicability of the HELIOS code for the analysis of the Th-based high conversion designs was confirmed with the help of continuous-energy Monte-Carlo code SERPENT. The results of optimization studies show that for the heterogeneous seed and blanket (SB) fuel assembly the FIR of about 0.95 can be achieved. (authors)

  17. Status: State Possibly Extirpated

    E-Print Network [OSTI]

    Tauschia Tenuissima; Rank Gsx

    when less than 4 inches tall; bulb-like root, 1/2 inch in diameter; leaves few, glabrous, divided three or more times into 3-13 narrow, linear segments up to 2 inches long and 1/2 inch wide. The flowers are white- to cream colored; rays of the umbel mostly 4-8, elongating unequally, the longer ones 2-6 inches long; pedicels very short, less than 1/8 inch long. The fruits are somewhat elliptic and lacking side wings. Identification Tips: The most distinctive features of this species are its early flowering, preference for meadowy habitats, and irregular umbels (see general description above). The species is difficult to locate unless it is found in rather dense patches. When growing in this manner, the distinctive creamy-white flowers are possible to identify, even from a distance. The genus Tauschia can easily be confused with the much larger genus Lomatium. Fortunately, no Lomatium species are found flowering in the same meadowy habitats in early spring. Mature fruits of Lomatium are flattened and winged, while those of Tauschia are cylindrical and lack wings. Phenology: Flowering occurs in early spring (April) often when the plant is only 1 inch tall. As the season continues (through May) the flower stems eventually elongate up to about 6 inches. Range: Regional endemic; currently known from northern ID and historically known from Spokane County, WA in the Columbia Basin physiographic province. Habitat: The species occupies grassy openings in moist to wet habitats. This includes meadows, river floodplains, and streambanks. Generally the areas are flat, although a few sites in Idaho were found on moderate slopes with perched water tables. Elevations range between 2580 to 3200 feet. The substrates tend to be productive silt/loams (loess) or alluvium. Some sites are known from the Palouse region in Idaho, however, the best sites are known from areas where meadows are surrounded by mixed coniferous forests of grand fir, Douglas fir,

  18. RESOLVING THE RADIO SOURCE BACKGROUND: DEEPER UNDERSTANDING THROUGH CONFUSION

    SciTech Connect (OSTI)

    Condon, J. J.; Cotton, W. D.; Fomalont, E. B.; Kellermann, K. I. [National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903 (United States); Miller, N. [Department of Astronomy, University of Maryland, College Park, MD 20742-2421 (United States); Perley, R. A. [National Radio Astronomy Observatory, P.O. Box 0, Socorro, NM 87801 (United States); Scott, D.; Vernstrom, T.; Wall, J. V. [Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1C1 (Canada)

    2012-10-10T23:59:59.000Z

    We used the Karl G. Jansky Very Large Array to image one primary beam area at 3 GHz with 8'' FWHM resolution and 1.0 {mu}Jy beam{sup -1} rms noise near the pointing center. The P(D) distribution from the central 10 arcmin of this confusion-limited image constrains the count of discrete sources in the 1 < S({mu}Jy) < 10 range. At this level, the brightness-weighted differential count S {sup 2} n(S) is converging rapidly, as predicted by evolutionary models in which the faintest radio sources are star-forming galaxies; and Almost-Equal-To 96% of the background originating in galaxies has been resolved into discrete sources. About 63% of the radio background is produced by active galactic nuclei (AGNs), and the remaining 37% comes from star-forming galaxies that obey the far-infrared (FIR)/radio correlation and account for most of the FIR background at {lambda} Almost-Equal-To 160 {mu}m. Our new data confirm that radio sources powered by AGNs and star formation evolve at about the same rate, a result consistent with AGN feedback and the rough correlation of black hole and stellar masses. The confusion at centimeter wavelengths is low enough that neither the planned Square Kilometre Array nor its pathfinder ASKAP EMU survey should be confusion limited, and the ultimate source detection limit imposed by 'natural' confusion is {<=}0.01 {mu}Jy at {nu} = 1.4 GHz. If discrete sources dominate the bright extragalactic background reported by ARCADE 2 at 3.3 GHz, they cannot be located in or near galaxies and most are {<=}0.03 {mu}Jy at 1.4 GHz.

  19. Pyrite footprinting of RNA

    SciTech Connect (OSTI)

    Schlatterer, Joerg C., E-mail: joerg.schlatterer@einstein.yu.edu [Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY (United States); Wieder, Matthew S. [Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY (United States)] [Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY (United States); Jones, Christopher D.; Pollack, Lois [School of Applied and Engineering Physics, Cornell University, Ithaca, NY (United States)] [School of Applied and Engineering Physics, Cornell University, Ithaca, NY (United States); Brenowitz, Michael [Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY (United States)] [Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY (United States)

    2012-08-24T23:59:59.000Z

    Highlights: Black-Right-Pointing-Pointer RNA structure is mapped by pyrite mediated {sup {center_dot}}OH footprinting. Black-Right-Pointing-Pointer Repetitive experiments can be done in a powdered pyrite filled cartridge. Black-Right-Pointing-Pointer High {sup {center_dot}}OH reactivity of nucleotides imply dynamic role in Diels-Alderase catalysis. -- Abstract: In RNA, function follows form. Mapping the surface of RNA molecules with chemical and enzymatic probes has revealed invaluable information about structure and folding. Hydroxyl radicals ({sup {center_dot}}OH) map the surface of nucleic acids by cutting the backbone where it is accessible to solvent. Recent studies showed that a microfluidic chip containing pyrite (FeS{sub 2}) can produce sufficient {sup {center_dot}}OH to footprint DNA. The 49-nt Diels-Alder RNA enzyme catalyzes the C-C bond formation between a diene and a dienophile. A crystal structure, molecular dynamics simulation and atomic mutagenesis studies suggest that nucleotides of an asymmetric bulge participate in the dynamic architecture of the ribozyme's active center. Of note is that residue U42 directly interacts with the product in the crystallized RNA/product complex. Here, we use powdered pyrite held in a commercially available cartridge to footprint the Diels-Alderase ribozyme with single nucleotide resolution. Residues C39 to U42 are more reactive to {sup {center_dot}}OH than predicted by the solvent accessibility calculated from the crystal structure suggesting that this loop is dynamic in solution. The loop's flexibility may contribute to substrate recruitment and product release. Our implementation of pyrite-mediated {sup {center_dot}}OH footprinting is a readily accessible approach to gleaning information about the architecture of small RNA molecules.

  20. LIDAR Wind Speed Measurement Analysis and Feed-Forward Blade Pitch Control for Load Mitigation in Wind Turbines: January 2010--January 2011

    SciTech Connect (OSTI)

    Dunne, F.; Simley, E.; Pao, L.Y.

    2011-10-01T23:59:59.000Z

    This report examines the accuracy of measurements that rely on Doppler LIDAR systems to determine their applicability to wind turbine feed-forward control systems and discusses feed-forward control system designs that use preview wind measurements. Light Detection and Ranging (LIDAR) systems are able to measure the speed of incoming wind before it interacts with a wind turbine rotor. These preview wind measurements can be used in feed-forward control systems designed to reduce turbine loads. However, the degree to which such preview-based control techniques can reduce loads by reacting to turbulence depends on how accurately the incoming wind field can be measured. The first half of this report examines the accuracy of different measurement scenarios that rely on coherent continuous-wave or pulsed Doppler LIDAR systems to determine their applicability to feed-forward control. In particular, the impacts of measurement range and angular offset from the wind direction are studied for various wind conditions. A realistic case involving a scanning LIDAR unit mounted in the spinner of a wind turbine is studied in depth with emphasis on choices for scan radius and preview distance. The effects of turbulence parameters on measurement accuracy are studied as well. Continuous-wave and pulsed LIDAR models based on typical commercially available units were used in the studies present in this report. The second half of this report discusses feed-forward control system designs that use preview wind measurements. Combined feedback/feed-forward blade pitch control is compared to industry standard feedback control when simulated in realistic turbulent above-rated winds. The feed-forward controllers are designed to reduce fatigue loads, increasing turbine lifetime and therefore reducing the cost of energy. Three feed-forward designs are studied: non-causal series expansion, Preview Control, and optimized FIR filter. The input to the feed-forward controller is a measurement of incoming wind speeds that could be provided by LIDAR. Non-causal series expansion and Preview Control methods reduce blade root loads but increase tower bending in simulation results. The optimized FIR filter reduces loads overall, keeps pitch rates low, and maintains rotor speed regulation and power capture, while using imperfect wind measurements provided by the spinning continuous-wave LIDAR model.

  1. Turbulence Considerations for Comparing Ecosystem Exchange over Old-Growth and Clear-Cut Stands For Limited Fetch and Complex Canopy Flow Conditions

    SciTech Connect (OSTI)

    Wharton, S; Schroeder, M; Paw U, K T; Falk, M; Bible, K

    2009-01-08T23:59:59.000Z

    Carbon dioxide, water vapor and energy fluxes were measured using eddy covariance (EC) methodology over three adjacent forests in southern Washington State to identify stand-level age-effects on ecosystem exchange. The sites represent Douglas-fir forest ecosystems at two contrasting successional stages: old-growth (OG) and early seral (ES). Here we present eddy flux and meteorological data from two early seral stands and the Wind River AmeriFlux old-growth forest during the growing season (March-October) in 2006 and 2007. We show an alternative approach to the usual friction velocity (u*) method for determining periods of adequate atmospheric boundary layer (ABL) mixing based on the ratio of mean horizontal ({bar u}) and vertical ({bar w}) wind flow to a modified turbulent kinetic energy scale (uTKE). This new parameter in addition to footprint modeling showed that daytime CO{sub 2} fluxes (F{sub NEE}) in small clear-cuts (< 10 hectares) can be measured accurately with EC if micrometeorological conditions are carefully evaluated. Peak midday CO{sub 2} fluxes (F{sub NEE} = -14.0 to -12.3 {micro}mol m{sup -2} s{sup -1}) at OG were measured in April in both 2006 and 2007 before bud break when air and soil temperatures and vapor pressure deficit were relatively low, and soil moisture and light levels were favorable for photosynthesis. At the early seral stands, peak midday CO{sub 2} fluxes (F{sub NEE} = -11.0 to -8.7 {micro}mol m{sup -2} s{sup -1}) were measured in June and July while spring-time CO{sub 2} fluxes were much smaller (F{sub NEE} = -3.8 to -3.6 {micro}mol m{sup -2} s{sup -1}). Overall, we measured lower evapotranspiration (OG = 230 mm; ES = 297 mm) higher midday F{sub NEE} (OG F{sub NEE} = -9.0 {micro}mol m{sup -2} s{sup -1}; ES F{sub NEE} = -7.3 {micro}mol m{sup -2} s{sup -1}) and higher Bowen ratios (OG {beta} = 2.0. ES {beta} = 1.2) at the old-growth forest than at the ES sites during the summer months (May-August). Eddy covariance studies such as ours add critical land-atmosphere exchange data for an abundant, but rarely studied Douglas-fir age class.

  2. DUST EMISSION AND STAR FORMATION IN STEPHAN'S QUINTET

    SciTech Connect (OSTI)

    Natale, G.; Tuffs, R. J. [Max Planck Institute fuer Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg (Germany); Xu, C. K.; Lu, N. [Infrared Processing and Analysis Center, California Institute of Technology 100-22, Pasadena, CA 91125 (United States); Popescu, C. C. [University of Central Lancashire, Preston, PR1 2HE (United Kingdom); Fischera, J. [Canadian Institute for Theoretical Astrophysics, University of Toronto, 60 Saint George Street, Toronto, ON, M5S 3H8 (Canada); Lisenfeld, U. [Department de Fisica Teorica y del Cosmos, Universidad de Granada, Granada (Spain); Appleton, P. [NASA Herschel Science Center, IPAC, California Institute of Technology, Pasadena, CA 91125 (United States); Dopita, M. [Research School of Astronomy and Astrophysics, The Australian National University, Cotter Road, Weston Creek, ACT 2611 (Australia); Duc, P.-A. [Laboratoire AIM, CEA/DSM-CNRS-Universite Paris Diderot, Dapnia/Service d'Astrophysique, CEA-Saclay, 91191 Gif-sur-Yvette Cedex (France); Gao, Y. [Purple Mountain Observatory, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing 210008 (China); Reach, W. [Spitzer Science Center, IPAC, California Institute of Technology, Pasadena, CA 91125 (United States); Sulentic, J. [Instituto de Astrofisica de AndalucIa, CSIC, Apdo. 3004, 18080, Granada (Spain); Yun, M., E-mail: giovanni.natale@mpi-hd.mpg.d, E-mail: richard.buffs@mpi-hd.mpg.d [Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States)

    2010-12-10T23:59:59.000Z

    We analyze a comprehensive set of MIR/FIR observations of Stephan's Quintet (SQ), taken with the Spitzer Space Telescope. Our study reveals the presence of a luminous (L{sub IR} {approx} 4.6 x 10{sup 43} erg s{sup -1}) and extended component of infrared dust emission, not connected with the main bodies of the galaxies, but roughly coincident with the X-ray halo of the group. We fitted the inferred dust emission spectral energy distribution of this extended source and the other main infrared emission components of SQ, including the intergalactic shock, to elucidate the mechanisms powering the dust and polycyclic aromatic hydrocarbon emission, taking into account collisional heating by the plasma and heating through UV and optical photons. Combining the inferred direct and dust-processed UV emission to estimate the star formation rate (SFR) for each source we obtain a total SFR for SQ of 7.5 M{sub sun} yr{sup -1}, similar to that expected for non-interacting galaxies with stellar mass comparable to the SQ galaxies. Although star formation in SQ is mainly occurring at, or external to the periphery of the galaxies, the relation of SFR per unit physical area to gas column density for the brightest sources is similar to that seen for star formation regions in galactic disks. We also show that available sources of dust in the group halo can provide enough dust to produce up to L{sub IR} {approx} 10{sup 42} erg s{sup -1} powered by collisional heating. Though a minority of the total infrared emission (which we infer to trace distributed star-formation), this is several times higher than the X-ray luminosity of the halo, so could indicate an important cooling mechanism for the hot intergalactic medium (IGM) and account for the overall correspondence between FIR and X-ray emission. We investigate two potential modes of star formation in SQ consistent with the data, fueled either by gas from a virialized hot IGM continuously accreting onto the group, whose cooling is enhanced by grains injected from an in situ population of intermediate mass stars, or by interstellar gas stripped from the galaxies. The former mode offers a natural explanation for the observed baryon deficiency in the IGM of SQ as well as for the steep L{sub X}-T{sub X} relation of groups such as SQ with lower velocity dispersions.

  3. A STUDY OF HEATING AND COOLING OF THE ISM IN NGC 1097 WITH HERSCHEL-PACS AND SPITZER-IRS

    SciTech Connect (OSTI)

    Beirao, P.; Armus, L. [Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125 (United States); Helou, G. [Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125 (United States); Appleton, P. N. [NASA Herschel Science Center, California Institute of Technology, Pasadena, CA 91125 (United States); Smith, J.-D. T.; Croxall, K. V. [Department of Physics and Astronomy, Mail Drop 111, University of Toledo, 2801 West Bancroft Street, Toledo, OH 43606 (United States); Murphy, E. J. [Carnegie Observatories, Pasadena, CA 91101 (United States); Dale, D. A. [Department of Physics and Astronomy, University of Wyoming, Laramie, WY 82071 (United States); Draine, B. T.; Aniano, G. [Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States); Wolfire, M. G.; Bolatto, A. D. [Department of Astronomy, University of Maryland, College Park, MD 20742 (United States); Sandstrom, K. M.; Groves, B.; Schinnerer, E.; Rix, H.-W. [Max-Planck-Institut fuer Astronomie, Koenigstuhl 17, 69117 Heidelberg (Germany); Brandl, B. R. [Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden (Netherlands); Crocker, A. F. [Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States); Hinz, J. L. [Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States); Kennicutt, R. C., E-mail: pedro@ipac.caltech.edu [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA (United Kingdom); and others

    2012-06-01T23:59:59.000Z

    NGC 1097 is a nearby Seyfert 1 galaxy with a bright circumnuclear starburst ring, a strong large-scale bar, and an active nucleus. We present a detailed study of the spatial variation of the far-infrared (FIR) [C II]158 {mu}m and [O I]63 {mu}m lines and mid-infrared H{sub 2} emission lines as tracers of gas cooling, and of the polycyclic aromatic hydrocarbon (PAH) bands as tracers of the photoelectric heating, using Herschel-PACS and Spitzer-IRS infrared spectral maps. We focus on the nucleus and the ring, and two star-forming regions (Enuc N and Enuc S). We estimated a photoelectric gas heating efficiency ([C II]158 {mu}m+[O I]63 {mu}m)/PAH in the ring about 50% lower than in Enuc N and S. The average 11.3/7.7 {mu}m PAH ratio is also lower in the ring, which may suggest a larger fraction of ionized PAHs, but no clear correlation with [C II]158 {mu}m/PAH(5.5-14 {mu}m) is found. PAHs in the ring are responsible for a factor of two more [C II]158 {mu}m and [O I]63 {mu}m emission per unit mass than PAHs in the Enuc S. spectral energy distribution (SED) modeling indicates that at most 25% of the FIR power in the ring and Enuc S can come from high-intensity photodissociation regions (PDRs), in which case G{sub 0} {approx} 10{sup 2.3} and n{sub H} {approx} 10{sup 3.5} cm{sup -3} in the ring. For these values of G{sub 0} and n{sub H}, PDR models cannot reproduce the observed H{sub 2} emission. Much of the H{sub 2} emission in the starburst ring could come from warm regions in the diffuse interstellar medium that are heated by turbulent dissipation or shocks.

  4. Mitsubishi Electric Corporation

    E-Print Network [OSTI]

    unknown authors

    2012-01-01T23:59:59.000Z

    Ex/)cri~~lenlral resul~s are presented for grease lubricaled gears. Firsl, the oil-Jilvtl formatio?ls were measured, using a power circii~l(~ling pnr muchine. The same tests were also performed ruitlt gear oils. The oil-film formation for grease was unstable compared lo oil. The res~alts show hat tile normal load a1 which lhe oil-film Sr,~-rttulion ofgrec~se becomes insufficient was about 60 percent of 1lrc~1fir oil. In addition, a life lest was carried out. Surface damage ofgec~r teeth was scoring rather than spalling. The gear lije was clo.sely related to the normal load. The results were also compared wilI ~ AGMA standards. I1 was suggested tltat lhe allowable surface r111.rcabilily of (L grechse lubricaled gear was 0.9 GPa in herlzian Pressi~re which was (about 60 percent that of an oil lubricaled gear. The (&(L were then used lo develop a design for grease lubricated gears.

  5. Compact, Low-power and Precision Timing Photodetector Readout

    SciTech Connect (OSTI)

    Varner, Gary S.; Ruckman, Larry L.; /Hawaii U.; Schwiening, Jochen; Vavra, Jaroslav; /SLAC

    2011-06-14T23:59:59.000Z

    Photodetector readout for next generation high event rate particle identification and single-photon detection requires a digitizer capable of integrated recording of dense arrays of sensor elements with high analog bandwidth (precision timing) and large record depth, in a cost-effective, compact and low-power way. Simply stated, one cannot do better than having a high-fidelity 'oscilloscope on a chip' for every sensor channel. A firs version of the Buffered Large Analog Bandwidth (BLAB1) ASIC has been designed based upon the lessons learned from the development of the Large Analog Bandwidth Recorder and Digitizer with Ordered Readout (LABRADOR) ASIC. While this LABRADOR ASIC has been very successful and forms the readout basis of a generation of new, large-scale radio neutrino detectors, its limited sampling depth is a major drawback. To address this shortcoming, a prototype intended for photodetector readout has been designed and fabricated with 64k deep sampling at multi-GSa/s operation. An evaluation system has been constructed for instrumentation of Time-Of-Propagation (TOP) and focusing DIRC prototypes and test results will be reported.

  6. Star formation in the cluster CLG0218.3-0510 at z=1.62 and its large-scale environment: the infrared perspective

    E-Print Network [OSTI]

    Santos, Joana S; Tanaka, Masayuki; Valtchanov, Ivan; Saintonge, Amelie; Dickinson, Mark; Foucaud, Sebastien; Kodama, Tadayuki; Rawle, Tim D; Tadaki, Ken-ichi

    2013-01-01T23:59:59.000Z

    The galaxy cluster CLG0218.3-0510 at z=1.62 is one of the most distant galaxy clusters known, with a rich muti-wavelength data set that confirms a mature galaxy population already in place. Using very deep, wide area (20x20 Mpc) imaging by Spitzer/MIPS at 24um, in conjunction with Herschel 5-band imaging from 100-500um, we investigate the dust-obscured, star-formation properties in the cluster and its associated large scale environment. Our galaxy sample of 693 galaxies at z=1.62 detected at 24um (10 spectroscopic and 683 photo-z) includes both cluster galaxies (i.e. within r projected clustercentric radius) and field galaxies, defined as the region beyond a radius of 3 Mpc. The star-formation rates (SFRs) derived from the measured infrared luminosity range from 18 to 2500 Ms/yr, with a median of 55 Ms/yr, over the entire radial range (10 Mpc). The cluster brightest FIR galaxy, taken as the centre of the galaxy system, is vigorously forming stars at a rate of 256$\\pm$70 Ms/yr, and the total cluster ...

  7. Direct detector for terahertz radiation

    DOE Patents [OSTI]

    Wanke, Michael C. (Albuquerque, NM); Lee, Mark (Albuquerque, NM); Shaner, Eric A. (Albuquerque, NM); Allen, S. James (Santa Barbara, CA)

    2008-09-02T23:59:59.000Z

    A direct detector for terahertz radiation comprises a grating-gated field-effect transistor with one or more quantum wells that provide a two-dimensional electron gas in the channel region. The grating gate can be a split-grating gate having at least one finger that can be individually biased. Biasing an individual finger of the split-grating gate to near pinch-off greatly increases the detector's resonant response magnitude over prior QW FET detectors while maintaining frequency selectivity. The split-grating-gated QW FET shows a tunable resonant plasmon response to FIR radiation that makes possible an electrically sweepable spectrometer-on-a-chip with no moving mechanical optical parts. Further, the narrow spectral response and signal-to-noise are adequate for use of the split-grating-gated QW FET in a passive, multispectral terahertz imaging system. The detector can be operated in a photoconductive or a photovoltaic mode. Other embodiments include uniform front and back gates to independently vary the carrier densities in the channel region, a thinned substrate to increase bolometric responsivity, and a resistive shunt to connect the fingers of the grating gate in parallel and provide a uniform gate-channel voltage along the length of the channel to increase the responsivity and improve the spectral resolution.

  8. Application of sewage sludge to non-agricultural ecosystems: Impacts of nitrogen on forests

    SciTech Connect (OSTI)

    Efroymson, R.A.; Tharp, M.L.; Luxmoore, R.J.; Sample, B.E.; Barnthouse, L.W. [Oak Ridge National Lab., TN (United States); Daniel, F.B. [Environmental Protection Agency, Cincinnati, OH (United States)

    1995-12-31T23:59:59.000Z

    The Clean Water Act (CWA) of 1977 directed EPA to establish standards for use and disposal of sewage sludge (biosolids). This report is part of a larger study evaluating nutrient and contaminant impacts associated with the land application of biosolids in non-agricultural ecosystems. Ecological risk assessments rarely focus on nutrients as stressors. The nutrient components of municipal sewage sludge may impact tree community composition, growth and production, habitat and forage quality for wildlife, and nutrient cycling. The focus here is on three forest ecosystems: northwestern Douglas-fir forest (Pack Forest, WA), southeastern loblolly pine plantation (Athens, GA), and eastern deciduous forest (Hubbard Brook, NH). A model called LINKAGES has been developed at ORNL to examine the relationships between nitrogen cycling and long-term forest stand dynamics, limited by climate and soil water status. Plant-available nitrogen from biosolids is added in several application scenarios and compared to the no-amendment case. All changes are noted, even if they may be viewed as benefits rather than risks. Model outputs include: above-ground biomass, individual species biomass, net above-ground production, leaf litter, evapotranspiration, available nitrogen, and dead trunks. The changes in plant community composition and production are dependent on the rate, frequency, and duration of sludge application and on the age of the stand at the time of application. Model outputs are compared to empirical studies of forests where biosolids have been applied.

  9. The Dust Properties of Bubble HII Regions as seen by Herschel

    E-Print Network [OSTI]

    Anderson, L D; Deharveng, L; Abergel, A; Motte, F; Andre, Ph; Bernard, J -P; Bontemps, S; Hennemann, M; Hill, T; Rodon, J A; Roussel, H; Russeil, D

    2012-01-01T23:59:59.000Z

    Because of their relatively simple morphology, "bubble" HII regions have been instrumental to our understanding of star formation triggered by HII regions. With the far-infrared (FIR) spectral coverage of the Herschel satellite, we can access the wavelengths where these regions emit the majority of their energy through their dust emission. At Herschel wavelengths 70 micron to 500 micron, the emission associated with HII regions is dominated by the cool dust in their photodissociation regions (PDRs). We find average dust temperatures of 26K along the PDRs, with little variation between the HII regions in the sample, while local filaments and infrared dark clouds average 19K and 15K respectively. Higher temperatures lead to higher values of the Jeans mass, which may affect future star formation. The mass of the material in the PDR, collected through the expansion of the HII region, is between ~300 and ~10,000 Solar masses for the HII regions studied here. These masses are in rough agreement with the expected ma...

  10. Discovery of TeV gamma-ray emission from the Pulsar Wind Nebula 3C 58 by MAGIC

    E-Print Network [OSTI]

    Bigas, O Blanch; Carmona, E; Pérez-Torres, M A

    2015-01-01T23:59:59.000Z

    The Pulsar Wind Nebula (PWN) 3C 58 is energized by one of the highest spin-down power pulsars known (5% of Crab pulsar) and it has been compared to the Crab Nebula due to their morphological similarities. This object was detected by Fermi-LAT with a spectrum extending beyond 100 GeV. We analyzed 81 hours of 3C 58 data taken with the MAGIC telescopes and we detected VHE gamma-ray emission for the first time at TeV energies with a significance of 5.7 sigma and an integral flux of 0.65% C.U. above 1 TeV. The differential energy spectrum between 400 GeV and 10 TeV is well described by a power-law function $d\\Phi/dE=f_{o}(E/1TeV)^{-\\Gamma}$ with $f_{o}=(2.0\\pm0.4stat\\pm0.6sys) 10^{-13}cm^{-2}s^{-1}TeV^{-1}$ and $\\Gamma=2.4\\pm0.2sta\\pm0.2sys$. This leads 3C 58 to be the least luminous PWN ever detected at VHE and the one with the lowest flux at VHE to date. According to time-dependent models in which electrons up-scatter photon fields, the best representation favors a distance to the PWN of 2 kpc and FIR comparable...

  11. Evaluation of the Life History of Native Salmonids in the Malheur River Basin; Cooperative Bull Trout/Redband Trout Research Project, 2002-2003 Annual Report.

    SciTech Connect (OSTI)

    Miller, Alan; Soupir, Jim (US Forest Service, Prairie City Ranger District, Prairie City, OR); Schwabe, Lawrence (Burns Paiute Tribe, Department of Fish and Wildlife, Burns, OR)

    2003-08-01T23:59:59.000Z

    The Malheur River is a 306-kilometer tributary to the Snake River, which drains 12,950 square kilometers. The Malheur River originates in the Blue Mountains and flows into the Snake River near Ontario, Oregon. The climate of the basin is characterized by hot dry summers, occasionally exceeding 38 C, and cold winters that may drop below -29 C. Average annual precipitation is 30 centimeters in the lower reaches. Wooded areas consist primarily of mixed fir and pine forest in the higher elevations. Sagebrush and grass communities dominate the flora in the lower elevations. Efforts to document salmonid life histories, water quality, and habitat conditions have continued in fiscal year 2002. Bull trout Salvelinus confluentus are considered to be cold water species and are temperature-dependant. Due to the interest of bull trout from various state and Federal agencies, a workgroup was formed to develop project objectives related to bull trout. Table 1 lists individuals that participated in the 2002 work group. This report will reflect work completed during the Bonneville Power Administration contract period starting April 1, 2002, and ending March 31, 2003. All tasks were conducted within this timeframe, and a more detailed timeframe may be referred to in each individual report.

  12. Plan for integrated testing for NNWSI [Nevada Nuclear Waste Storage Investigations] non EQ3/6 data base portion

    SciTech Connect (OSTI)

    Oversby, V.M.

    1987-05-29T23:59:59.000Z

    The purposes of the Integrated Testing Task are to develop laboratory data on thermodynamic properties for actinide and fission product elements for use in the EQ3/6 geochemical modelling code; to determine the transport properties of radionuclides in the near-field environment; and develop and validate a model to describe the rate of release of radionuclides from the near-field environment. Activities to achieve the firs item have been described in the Scientific Investigation Plan for EQ3/6, where quality assurance levels were assigned to the acitivities. This Scientific Investigation Plan describes activities to achieve the second and third purposes. The information gathered in these activities will be used to assess compliance with the performance objective for the Engineered Barrier System (EBS) to control the rate of release of radionuclides if the repository license application includes part of the host rock; to provide a source term for release of radionuclides from the waste package near-field environment to the system performance assessment task for use in showing compliance with the Environmental Protection Agency requirements; and to provide a source term for release of radionculides from the waste package near-field environment to the system performance assessment task for use in doing calculations of cumulative releases of radionuclides from the repository over 100,000 years as required by the site evaluation process. 5 refs.

  13. Infrared colour properties of nearby radio-luminous galaxies

    E-Print Network [OSTI]

    Yang, Xiao-hong; Huang, Yan

    2015-01-01T23:59:59.000Z

    By combining the data of the Two Micron All Sky Survey (2MASS), the Wide Field Infrared Survey Explorer (WISE) and the Akari satellite, we study the infrared colour properties of a sample of 2712 nearby radio-luminous galaxies (RLGs). These RLGs are divided into radio-loud (RL) active galactic nuclei (AGNs), mainly occurring at redshifts of $0.05$ 3.0. We also analyse the MIR colours of RL AGNs divided into low- and high-excitation radio galaxies (LERGs and HERGs, respectively). The ([3.4]-[4.6])$-$([4.6]-[12]) diagram clearly shows separate distributions of LERGs and HERGs and a region of overlap, which suggests that LERGs and HERGs have different MIR properties. LERGs are responsible for the double-core distribution of RL AGNs on the ([3.4]-[4.6])$-$([4.6]-[12]) diagram. In addition, we also suggest 90$-$140$\\mu$m band spectral index $\\alpha(90,140)<-1.4$ as a criterion of selecting nearby active galaxies with non-thermal emissions at FIR wavelengths.

  14. Field evaluation of composite crossarms

    SciTech Connect (OSTI)

    Diebel, J.F.; Charneski, M.D.; Bulleit, W.A.; Pickens, J.M. (Michigan Technological Univ., Houghton, MI (United States). Inst. of Wood Research)

    1991-10-01T23:59:59.000Z

    In 1982 the Institute of Wood Research manufactured 200 composite wood crossarms (COMARMS) for a field evaluation of their performance in service. Four different types of COMARMS were fabricated using wood flake panels to test how long term load carrying capacity is affected by varying wood furnish, wood preservatives and adhesive system. After placement with utilities in Louisiana, Michigan, New Mexico, Texas and Washington, field inspections were carried out on over 120 COMARMS after 3 years of exposure and 6 years exposure. After 6 years of exposure, most of the COMARMS were removed at random and returned to the Institute for destructive mechanical testing and evaluation. Half of the controls were mechanically tested soon after fabrication, the other half were tested with the exposed COMARMS after six years of inside storage. Tests of insulating performance in weathered and unweathered arms were carried out by Detroit Edison Company. Results of the mechanical tests and field inspections showed a wide variety of performance strongly correlated to the formulation type. Results of the mechanical and electrical testing indicate that performance similar to that observed in the best formulations would be comparable to Douglas-fir crossarms. 24 refs.

  15. The Herschel Virgo Cluster Survey XVI: a cluster inventory

    E-Print Network [OSTI]

    Davies, J I; Baes, M; Bendo, G J; Clemens, M; De Looze, I; Alighieri, S di Serego; Fritz, J; Fuller, C; Pappalardo, C; Hughes, T M; Madden, S; Smith, M W L; Verstappen, J; Vlahakis, C

    2013-01-01T23:59:59.000Z

    Herschel FIR observations are used to construct Virgo cluster galaxy luminosity functions and to show that the cluster lacks the very bright and the numerous faint sources detected in field galaxy surveys. The far-infrared SEDs are fitted to obtain dust masses and temperatures and the dust mass function. The cluster is over dense in dust by about a factor of 100 compared to the field. The same emissivity (beta) temperature relation applies for different galaxies as that found for different regions of M31. We use optical and HI data to show that Virgo is over dense in stars and atomic gas by about a factor of 100 and 20 respectively. Metallicity values are used to measure the mass of metals in the gas phase. The mean metallicity is about 0.7 solar and 50% of the metals are in the dust. For the cluster as a whole the mass density of stars in galaxies is 8 times that of the gas and the gas mass density is 130 times that of the metals. We use our data to consider the chemical evolution of the individual galaxies,...

  16. Large and small-scale structures and the dust energy balance problem in spiral galaxies

    E-Print Network [OSTI]

    Saftly, W; De Geyter, G; Camps, P; Renaud, F; Guedes, J; De Looze, I

    2015-01-01T23:59:59.000Z

    The interstellar dust content in galaxies can be traced in extinction at optical wavelengths, or in emission in the far-infrared. Several studies have found that radiative transfer models that successfully explain the optical extinction in edge-on spiral galaxies generally underestimate the observed FIR/submm fluxes by a factor of about three. In order to investigate this so-called dust energy balance problem, we use two Milky Way-like galaxies produced by high-resolution hydrodynamical simulations. We create mock optical edge-on views of these simulated galaxies (using the radiative transfer code SKIRT), and we then fit the parameters of a basic spiral galaxy model to these images (using the fitting code FitSKIRT). The basic model includes smooth axisymmetric distributions along a S\\'ersic bulge and exponential disc for the stars, and a second exponential disc for the dust. We find that the dust mass recovered by the fitted models is about three times smaller than the known dust mass of the hydrodynamical in...

  17. Submm-bright X-ray absorbed QSOs at z~2: insights into the co-evolution of AGN and star-formation

    E-Print Network [OSTI]

    Khan-Ali, A; Page, M J; Stevens, J A; Mateos, S; Symeonidis, M; Orjales, J M Cao

    2015-01-01T23:59:59.000Z

    We have assembled a sample of 5 X-ray-absorbed and submm-luminous type 1 QSOs at $z \\sim 2$ which are simultaneously growing their central black holes through accretion and forming stars copiously. We present here the analysis of their rest-frame UV to submm Spectral Energy Distributions (SEDs), including new Herschel data. Both AGN (direct and reprocessed) and Star Formation (SF) emission are needed to model their SEDs. From the SEDs and their UV-optical spectra we have estimated the masses of their black holes $M_{BH}\\sim 10^{9}-10^{10}\\,M_{\\odot}$, their intrinsic AGN bolometric luminosities $L_{BOL}\\sim(0.8 - 20)\\times 10^{13} L_{\\odot}$, Eddington ratios $L_{BOL}/L_{Edd}\\sim 0.1 - 1.1$ and bolometric corrections $L_{BOL}/L_{X,2-10}\\sim 30 - 500$. These values are common among optically and X-ray-selected type 1 QSOs (except for RX~J1249), except for the bolometric corrections, which are higher. These objects show very high far-infrared luminosities $L_{FIR}\\sim$ (2 - 8)$\\times10^{12}\\,M_{\\odot}$ and Star...

  18. Constraining the properties of AGN host galaxies with Spectral Energy Distribution modeling

    E-Print Network [OSTI]

    Ciesla, L; Georgakakis, A; Bernhard, E; Mitchell, P D; Buat, V; Elbaz, D; Floc'h, E Le; Lacey, C G; Magdis, G E; Xilouris, M

    2015-01-01T23:59:59.000Z

    [abridged] We use the latest release of CIGALE, a galaxy SED fitting model relying on energy balance, to study the influence of an AGN in estimating both the SFR and stellar mass in galaxies, as well as the contribution of the AGN to the power output of the host. Using the galaxy formation SAM GALFORM, we create mock galaxy SEDs using realistic star formation histories (SFH) and add an AGN of Type 1, Type 2, or intermediate type whose contribution to the bolometric luminosity can be variable. We perform an SED fitting of these catalogues with CIGALE assuming three different SFHs: a single- and double-exponentially-decreasing, and a delayed SFH. Constraining thecontribution of an AGN to the LIR (fracAGN) is very challenging for fracAGN<20%, with uncertainties of ~5-30% for higher fractions depending on the AGN type, while FIR and sub-mm are essential. The AGN power has an impact on the estimation of $M_*$ in Type 1 and intermediate type AGNs but has no effect for galaxies hosting Type 2 AGNs. We find that i...

  19. Models comparison for JET polarimeter data

    SciTech Connect (OSTI)

    Mazzotta, C.; Orsitto, F. P.; Giovannozzi, E. [Centro Ricerche Energia Frascati, Euratom-ENEA Association, Frascati (Italy); Boboc, A.; Tudisco, O.; Zabeo, L. [Association EURATOM-UKAEA Culham Science Centre Abingdon 0X14 3DB (UK) (United Kingdom); Brombin, M.; Murari, A. [Consorzio RFX, Euratom-ENEA Association, Padova (Italy)

    2008-03-12T23:59:59.000Z

    A complete comparison between the theory and the measurements in polarimetry was done by using the Far Infrared Polarimeter at JET. More than 300 shots were analyzed, including a wide spectrum of JET scenarios in all critical conditions for polarimetry: high density, high and very low fields, high temperatures.This work is aimed at the demonstration of the robustness of the theoretical models for the JET polarimeter measurements in the perspective of using these models for ITER like plasma scenarios . In this context, an assessment was performed on how the line-integrated plasma density along the central vertical chord of FIR polarimeter could be evaluated using the Cotton-Mouton effect and its possible concrete use to correct fringe jumps of the interferometer.The models considered are: i) the rigorous numerical solution of the Stokes propagation equations, using dielectric tensor evaluated from JET equilibrium and Thomson scattering [1,2]; ii) two types of approximated solutions [2,3] and iii) the Guenther empirical model [4] that considers the mutual effect between Cotton-Mouton and Faraday rotation angle. The model calculations have been compared with polarimeter measurements for the Cotton-Mouton phase shift.The agreement with theory is satisfactory within the limits of experimental errors [3].

  20. The earliest phases of star formation observed with Herschel (EPoS): The dust temperature and density distributions of B68

    E-Print Network [OSTI]

    Nielbock, M; Steinacker, J; Stutz, A M; Balog, Z; Beuther, H; Bouwman, J; Henning, Th; Hily-Blant, P; Kainulainen, J; Krause, O; Linz, H; Lippok, N; Ragan, S; Risacher, C; Schmiedeke, A

    2012-01-01T23:59:59.000Z

    (Abriged) In the framework of the Herschel GTKP "The earliest phases of star formation", we have imaged B68 between 100 and 500 um. Ancillary (sub)mm data, spectral line maps of the 12/13CO(2-1) transitions as well as a NIR extinction map were added to the analysis. We employed a ray-tracing algorithm to derive the 2D mid-plane dust temperature and volume density distribution without suffering from LoS averaging effects of simple SED fitting procedures. Additional 3D radiative transfer calculations were employed to investigate the connection between the external irradiation and the peculiar crescent shaped morphology found in the FIR maps. For the first time, we spatially resolve the dust temperature and density distribution of B68. We find T_dust dropping from 16.7 K at the edge to 8.2 K in the centre, which is about 4 K lower than the result of the simple SED fitting approach. N_H peaks at 4.3x10^22 cm^-2 and n_H at 3.4x10^5 cm^-3 in the centre. B68 has a mass of 3.1 M_sun of material with A_K > 0.2 mag for...

  1. BASELINE MEMBRANE SELECTION AND CHARACTERIZATION FOR AN SDE

    SciTech Connect (OSTI)

    Colon-Mercado, H; David Hobbs, D

    2007-04-03T23:59:59.000Z

    Thermochemical processes are being developed to provide global-scale quantities of hydrogen. A variant on sulfur-based thermochemical cycles is the Hybrid Sulfur (HyS) Process which uses a sulfur dioxide depolarized electrolyzer (SDE) to produce the hydrogen. In FY05 and FY06, testing at the Savannah River National Laboratory (SRNL) explored a low temperature fuel cell design concept for the SDE. The advantages of this design concept include high electrochemical efficiency and small footprint that are crucial for successful implementation on a commercial scale. A key component of the SDE is the ion conductive membrane through which protons produced at anode migrate to the cathode and react to produce hydrogen. An ideal membrane for the SDE should have both low ionic resistivity and low sulfur dioxide transport. These features allow the electrolyzer to perform at high currents with low potentials, along with preventing contamination of both the hydrogen output and poisoning of the catalysts involved. Another key component is the electrocatalyst material used for the anode and cathode. Good electrocatalysts should be chemically stable and have a low overpotential for the desired electrochemical reactions. This report summarizes results from activities to evaluate commercial and experimental membranes for the SDE. Several different types of commercially-available membranes were analyzed for sulfur dioxide transport as a function of acid strength including perfluorinated sulfonic acid (PFSA), sulfonated poly-etherketone-ketone, and poly-benzimidazole (PBI) membranes. Experimental membranes from the sulfonated diels-alder polyphenylenes (SDAPP) and modified Nafion{reg_sign} 117 were evaluated for SO{sub 2} transport as well. These membranes exhibited reduced transport coefficient for SO{sub 2} transport without the loss in ionic conductivity. The use of Nafion{reg_sign} with EW 1100 is recommended for the present SDE testing due to the limited data regarding chemical and mechanical stability of experimental membranes. Development of new composite membranes by incorporating metal particles or by forming multilayers between PFSA membranes and hydrocarbon membranes will provide methods that will meet the SDE targets (SO{sub 2} transport reduction by a factor of 100) while decreasing catalyst layer delamination and membrane resistivity.

  2. FY08 MEMBRANE CHARACTERIZATION REPORT FOR HYBRID SULFUR ELECTROLYZER

    SciTech Connect (OSTI)

    Hobbs, D; Hector Colon-Mercado, H; Mark Elvington, M

    2008-09-01T23:59:59.000Z

    This report summarizes results from all of the membrane testing completed to date at the Savannah River National Laboratory (SRNL) for the sulfur dioxide-depolarized electrolyzer (SDE). Several types of commercially-available membranes have been analyzed for ionic resistance and sulfur dioxide transport including perfluorinated sulfonic acid (PFSA), sulfonated polyether-ketone-ketone (SPEKK), and polybenzimidazole membranes (PBI). Of these membrane types, the poly-benzimidazole membrane, Celtec-L, exhibited the best combination of characteristics for use in an SDE. Several experimental membranes have also been analyzed including hydrated sulfonated Diels-Alder polyphenylenes (SDAPP) membranes from Sandia National Laboratory, perfluorosulfonimide (PFSI) and sulfonated perfluorocyclobutyl aromatic ether (S-PFCB) prepared by Clemson University, hydrated platinum-treated PFSA prepared by Giner Electrochemical Systems (GES) and Pt-Nafion{reg_sign} 115 composites prepared at SRNL. The chemical stability, SO{sub 2} transport and ionic conductivity characteristics have been measured for several commercially available and experimental proton-conducting membranes. Commercially available PFSA membranes such as the Nafion{reg_sign} series exhibited excellent chemical stability and ionic conductivity in sulfur dioxide saturated sulfuric acid solutions. Sulfur dioxide transport in the Nafion{reg_sign} membranes varied proportionally with the thickness and equivalent weight of the membrane. Although the SO{sub 2} transport in the Nafion{reg_sign} membranes is higher than desired, the excellent chemical stability and conductivity makes this membrane the best commercially-available membrane at this time. Initial results indicated that a modified Nafion{reg_sign} membrane incorporating Pt nanoparticles exhibited significantly reduced SO{sub 2} transport. Reduced SO{sub 2} transport was also measured with commercially available PBI membrane and several experimental membranes produced at SNL and Clemson. These membranes also exhibit good chemical stability and conductivity in concentrated sulfuric acid solutions and, thus, serve as promising candidates for the SDE. Therefore, we recommend further testing of these membranes including electrolyzer testing to determine if the reduced SO{sub 2} transport eliminates the formation of sulfur-containing films at the membrane/cathode interface. SO{sub 2} transport measurements in the custom built characterization cell identified experimental limitations of the original design. During the last quarter of FY08 we redesigned and fabricated a new testing cell to overcome the previous limitations. This cell also offers the capability to test membranes under polarized conditions as well as test the performance of MEAs under selected electrolyzer conditions.

  3. Multimodality Imaging with Silica-Based Targeted Nanoparticle Platforms

    SciTech Connect (OSTI)

    Jason S. Lewis

    2012-04-09T23:59:59.000Z

    Objectives: To synthesize and characterize a C-Dot silica-based nanoparticle containing 'clickable' groups for the subsequent attachment of targeting moieties (e.g., peptides) and multiple contrast agents (e.g., radionuclides with high specific activity) [1,2]. These new constructs will be tested in suitable tumor models in vitro and in vivo to ensure maintenance of target-specificity and high specific activity. Methods: Cy5 dye molecules are cross-linked to a silica precursor which is reacted to form a dye-rich core particle. This core is then encapsulated in a layer of pure silica to create the core-shell C-Dot (Figure 1) [2]. A 'click' chemistry approach has been used to functionalize the silica shell with radionuclides conferring high contrast and specific activity (e.g. 64Cu and 89Zr) and peptides for tumor targeting (e.g. cRGD and octreotate) [3]. Based on the selective Diels-Alder reaction between tetrazine and norbornene, the reaction is bioorthogonal, highyielding, rapid, and water-compatible. This radiolabeling approach has already been employed successfully with both short peptides (e.g. octreotate) and antibodies (e.g. trastuzumab) as model systems for the ultimate labeling of the nanoparticles [1]. Results: PEGylated C-Dots with a Cy5 core and labeled with tetrazine have been synthesized (d = 55 nm, zeta potential = -3 mV) reliably and reproducibly and have been shown to be stable under physiological conditions for up to 1 month. Characterization of the nanoparticles revealed that the immobilized Cy5 dye within the C-Dots exhibited fluorescence intensities over twice that of the fluorophore alone. The nanoparticles were successfully radiolabeled with Cu-64. Efforts toward the conjugation of targeting peptides (e.g. cRGD) are underway. In vitro stability, specificity, and uptake studies as well as in vivo imaging and biodistribution investigations will be presented. Conclusions: C-Dot silica-based nanoparticles offer a robust, versatile, and multi-functional platform to enhance in vivo detection sensitivity and non-invasively assay receptor expression/status of tumor cellular targets, including those of low abundance, using nuclear-NIR fluorescence imaging approaches [2]. Improvements in molecular diagnostics, refined by the availability of nanotechnology platforms, will be a key determinant in driving early-stage disease detection and prevention, ultimately leading to decreases in mortality.

  4. A DUAL-BAND MILLIMETER-WAVE KINETIC INDUCTANCE CAMERA FOR THE IRAM 30 m TELESCOPE

    SciTech Connect (OSTI)

    Monfardini, A.; Benoit, A.; Bideaud, A.; Swenson, L.; Cruciani, A.; Camus, P.; Hoffmann, C. [Institut Neel, CNRS and Universite Joseph Fourier (UJF), Grenoble F-38042 (France); Desert, F. X. [Institut de Planetologie et d'Astrophysique, UJF and CNRS-INSU, Grenoble F-38041 (France); Doyle, S.; Ade, P.; Mauskopf, P.; Tucker, C. [Cardiff School of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA (United Kingdom); Roesch, M.; Leclercq, S.; Schuster, K. F. [Institut de RadioAstronomie Millimetrique (IRAM), Saint Martin d'Heres F-38406 (France); Endo, A. [Kavli Institute of NanoScience, Delft University of Technology, 2628 CJ Delft (Netherlands); Baryshev, A.; Baselmans, J. J. A.; Ferrari, L.; Yates, S. J. C, E-mail: monfardini@grenoble.cnrs.fr [SRON, Netherlands Institute for Space Research, 3584 CA Utrecht and 9700 AV Groningen (Netherlands)

    2011-06-01T23:59:59.000Z

    The Neel IRAM KIDs Array (NIKA) is a fully integrated measurement system based on kinetic inductance detectors (KIDs) currently being developed for millimeter wave astronomy. The instrument includes dual-band optics allowing simultaneous imaging at 150 GHz and 220 GHz. The imaging sensors consist of two spatially separated arrays of KIDs. The first array, mounted on the 150 GHz branch, is composed of 144 lumped-element KIDs. The second array (220 GHz) consists of 256 antenna-coupled KIDs. Each of the arrays is sensitive to a single polarization; the band splitting is achieved by using a grid polarizer. The optics and sensors are mounted in a custom dilution cryostat, with an operating temperature of {approx}70 mK. Electronic readout is realized using frequency multiplexing and a transmission line geometry consisting of a coaxial cable connected in series with the sensor array and a low-noise 4 K amplifier. The dual-band NIKA was successfully tested in 2010 October at the Institute for Millimetric Radio Astronomy (IRAM) 30 m telescope at Pico Veleta, Spain, performing in-line with laboratory predictions. An optical NEP was then calculated to be around 2 x 10{sup -16} W Hz{sup -1/2} (at 1 Hz) while under a background loading of approximately 4 pW pixel{sup -1}. This improvement in comparison with a preliminary run (2009) verifies that NIKA is approaching the target sensitivity for photon-noise limited ground-based detectors. Taking advantage of the larger arrays and increased sensitivity, a number of scientifically relevant faint and extended objects were then imaged including the Galactic Center SgrB2 (FIR1), the radio galaxy Cygnus A, and the NGC1068 Seyfert galaxy. These targets were all observed simultaneously in the 150 GHz and 220 GHz atmospheric windows.

  5. Infrared Properties of Close Pairs of Galaxies

    E-Print Network [OSTI]

    Margaret J. Geller; Scott J. Kenyon; Elizabeth J. Barton; Thomas H. Jarrett; Lisa J. Kewley

    2006-08-02T23:59:59.000Z

    We discuss spectroscopy and infrared photometry for a complete sample of ~ 800 galaxies in close pairs objectively selected from the CfA2 redshift survey. We use 2MASS to compare near infrared color-color diagrams for our sample with the Nearby Field Galaxy Sample and with a set of IRAS flux-limited pairs from Surace et al. We construct a basic statistical model to explore the physical sources of the substantial differences among these samples. The model explains the spread of near infrared colors and is consistent with a picture where central star formation is triggered by the galaxy-galaxy interaction before a merger occurs. For 160 galaxies we report new, deep JHK photometry within our spectroscopic aperture and we use the combined spectroscopic and photometric data to explore the physical conditions in the central bursts. We find a set of objects with H-K >= 0.45 and with a large F(FIR)/F(H). We interpret the very red H-K colors as evidence for 600-1000 K dust within compact star-forming regions, perhaps similar to super-star clusters identified in individual well-studied interacting galaxies. The galaxies in our sample are candidate ``hidden'' bursts or, possibly, ``hidden'' AGN. Over the entire pair sample, both spectroscopic and photometric data show that the specific star formation rate decreases with the projected separation of the pair. The data suggest that the near infrared color-color diagram is also a function of the projected separation; all of the objects with central near infrared colors indicative of bursts of star formation lie at small projected separation.

  6. Near-infrared Spectroscopy and HST Imaging of a Dusty Starburst ERO

    E-Print Network [OSTI]

    Graham P. Smith; Tommaso Treu; Richard Ellis; Ian Smail; Jean-Paul Kneib; Brenda Frye

    2001-08-02T23:59:59.000Z

    We present near-IR spectroscopy and HST imaging of EROJ164023, an Extremely Red Object (ERO) with R-K=5.9 at z=1.05. EROJ164023 is a disk galaxy, with an optical/IR spectral energy distribution which is strongly reddened by dust (L_FIR/L_B<~200; A_V~5). The narrow emission lines (~300km/s) and the high [NII]/Halpha line ratio indicate that this is a ``composite'' starburst-Seyfert galaxy. Assuming that star formation dominates, we constrain the SFR to be 10-700Mo/yr from a variety of indicators. We compare EROJ164023 with the only other spectroscopically identified dusty EROs: HR10 (z=1.44) and ISOJ1324-2016 (z=1.50). EROJ164023 and HR10 have similar disk-like morphologies, and both exhibit a variation in the apparent dust obscuration depending upon the diagnostic used, suggesting that there is a complex spatial mix of stellar populations and dust in these galaxies. In contrast, the compact morphology and spectral properties of ISOJ1324-2016 indicate that it is a dusty quasar. Our results demonstrate that dusty galaxies identified using photometric ERO criteria include pure starbursts, composite systems such as EROJ164023 and dusty quasars. We suggest that the classification of EROs into these sub-classes cannot be reliably achieved from optical/near-IR photometry and instead requires mid/far-IR or sub-mm photometry and near-IR spectroscopy. The advent of efficient multi-object spectrographs working in the near-IR as well as the imminent launch of SIRTF therefore promise the opportunity of rapid progress in our understanding of the elusive ERO population. [Abridged

  7. 1994 Northern Goshawk inventory on portions of Los Alamos National Laboratory, Los Alamos, NM

    SciTech Connect (OSTI)

    Sinton, D.T.; Kennedy, P.L. [Colorado State Univ., Fort Collins, CO (United States)

    1995-01-01T23:59:59.000Z

    Northern goshawks (Accipiter gentilis) (hereafter referred to as goshawk) are large forest dwelling hawks. They are the largest species of the Accipiter genus which also includes sharp-shinned hawks (A. striatus) and the Cooper`s hawk (A. cooperii). Goshawks are holarctic in distribution and nest in coniferous, deciduous, and mixed species forests. In the southwest they primarily nest in ponderosa pine (Pinus ponderosa), mixed species, and spruce-fir forests. Goshawks may be declining in population and reproduction in the southwestern United States. In 1982 the USDA-Forest Service listed the goshawk as a {open_quotes}sensitive species{close_quotes} and in 1992 the U.S. Fish and Wildlife Service listed the goshawk as a {open_quotes}Category 2 species{close_quotes} in accordance with the Endangered Species Act. Reasons for the possible decline in goshawk populations include timber harvesting resulting in the loss of nesting habitat, toxic chemicals, and the effects of drought, fire, and disease. Thus, there is a need to determine their population status and assess impacts of management activities in potential goshawk habitat. Goshawk inventory was conducted during the 1993 nesting season with no adult goshawk responses detected within the LANL survey area. As noted by Sinton and Kennedy, these results may be interpreted in several ways: (1) no goshawk territory(ies) occur in the inventoried area; (2) goshawk territory(ies) exist but have failed prior to the survey and thus were not detected; or (3) territory(ies) exist and were successful but the goshawks did not respond to tapes or their responses were undetected by the observer. For those reasons, a goshawk inventory was conducted in 1994. This report summarizes the results of this inventory.

  8. Thermal decomposition of charring materials

    SciTech Connect (OSTI)

    Nurbakhsh, S.

    1989-01-01T23:59:59.000Z

    Experimental techniques and methods were developed to investigate the transient process of wood pyrolysis under different levels of external radiation, moisture content of the wood sample, and oxygen concentration of the ambient atmosphere. A unique small-scale combustion-wind tunnel was constructed to conduct the pyrolysis experiments and to obtain the time dependent gasification mass flux, surface and in-depth temperatures, and evolved products of pyrolysis (CO, CO{sub 2}, H{sub 2}O, and total hydrocarbons (THC)) for thermally thick samples of Douglas-fir. Experiments were performed both in inert atmosphere (nitrogen), and in air at several different heat fluxes and three different moisture contents of wood. Time dependent empirical chemical composition, char yield, and the heat of combustion of the pyrolysis products were determined. The experimental results indicate that the presence of moisture reduces the pyrolysis mass flux and delays the occurrence of its maxima. Presence of oxygen drastically increases the pyrolysis mass flux but its effect specially at lower temperatures depends on the experimental conditions such as the boundary layer thickness over the wood surface. Char yield, chemical composition of the volatiles, and the heat of combustion were found to vary during the pyrolysis process and with changes in the environmental conditions and wood moisture content. The pyrolysis temperature assumption often used for the simplified modeling of wood pyrolysis was examined in detail by considering two otherwise identical models; one with infinitely fast decomposition kinetics and the other with finite rate chemistry. It was concluded that the pyrolysis temperature is not a material property and different pyrolysis temperatures are needed for every problem.

  9. Biological Information Document, Radioactive Liquid Waste Treatment Facility

    SciTech Connect (OSTI)

    Biggs, J.

    1995-12-31T23:59:59.000Z

    This document is intended to act as a baseline source material for risk assessments which can be used in Environmental Assessments and Environmental Impact Statements. The current Radioactive Liquid Waste Treatment Facility (RLWTF) does not meet current General Design Criteria for Non-reactor Nuclear Facilities and could be shut down affecting several DOE programs. This Biological Information Document summarizes various biological studies that have been conducted in the vicinity of new Proposed RLWTF site and an Alternative site. The Proposed site is located on Mesita del Buey, a mess top, and the Alternative site is located in Mortandad Canyon. The Proposed Site is devoid of overstory species due to previous disturbance and is dominated by a mixture of grasses, forbs, and scattered low-growing shrubs. Vegetation immediately adjacent to the site is a pinyon-juniper woodland. The Mortandad canyon bottom overstory is dominated by ponderosa pine, willow, and rush. The south-facing slope was dominated by ponderosa pine, mountain mahogany, oak, and muhly. The north-facing slope is dominated by Douglas fir, ponderosa pine, and oak. Studies on wildlife species are limited in the vicinity of the proposed project and further studies will be necessary to accurately identify wildlife populations and to what extent they utilize the project area. Some information is provided on invertebrates, amphibians and reptiles, and small mammals. Additional species information from other nearby locations is discussed in detail. Habitat requirements exist in the project area for one federally threatened wildlife species, the peregrine falcon, and one federal candidate species, the spotted bat. However, based on surveys outside of the project area but in similar habitats, these species are not expected to occur in either the Proposed or Alternative RLWTF sites. Habitat Evaluation Procedures were used to evaluate ecological functioning in the project area.

  10. ALIGNMENT BETWEEN FLATTENED PROTOSTELLAR INFALL ENVELOPES AND AMBIENT MAGNETIC FIELDS

    SciTech Connect (OSTI)

    Chapman, Nicholas L.; Matthews, Tristan G.; Novak, Giles [Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) and Department of Physics and Astronomy, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (United States); Davidson, Jacqueline A. [School of Physics, University of Western Australia, 35 Stirling Hwy, Crawley, WA 6009 (Australia); Goldsmith, Paul F. [Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, MS 264-782, Pasadena, CA 91109 (United States); Houde, Martin [Department of Physics and Astronomy, University of Western Ontario, London, ON (Canada); Kwon, Woojin; Looney, Leslie W. [Department of Astronomy, University of Illinois, 1002 West Green Street, Urbana, IL 61801 (United States); Li Zhiyun [Astronomy Department, University of Virginia, Charlottesville, VA 22904 (United States); Matthews, Brenda [Herzberg Institute of Astrophysics, National Research Council of Canada, 5071 West Saanich Road, Victoria, BC V9E 2E7 (Canada); Peng Ruisheng [Caltech Submillimeter Observatory, 111 Nowelo Street, Hilo, HI 96720 (United States); Vaillancourt, John E. [SOFIA Science Center, Universities Space Research Association, NASA Ames Research Center, MS 232-11, Moffett Field, CA 94035-0001 (United States); Volgenau, Nikolaus H. [California Institute of Technology, Owens Valley Radio Observatory, Big Pine, CA 93513 (United States)

    2013-06-20T23:59:59.000Z

    We present 350 {mu}m polarization observations of four low-mass cores containing Class 0 protostars: L483, L1157, L1448-IRS2, and Serp-FIR1. This is the second paper in a larger survey aimed at testing magnetically regulated models for core-collapse. One key prediction of these models is that the mean magnetic field in a core should be aligned with the symmetry axis (minor axis) of the flattened young stellar object inner envelope (aka pseudodisk). Furthermore, the field should exhibit a pinched or hourglass-shaped morphology as gravity drags the field inward toward the central protostar. We combine our results for the four cores with results for three similar cores that were published in the first paper from our survey. An analysis of the 350 {mu}m polarization data for the seven cores yields evidence of a positive correlation between mean field direction and pseudodisk symmetry axis. Our rough estimate for the probability of obtaining by pure chance a correlation as strong as the one we found is about 5%. In addition, we combine together data for multiple cores to create a source-averaged magnetic field map having improved signal-to-noise ratio, and this map shows good agreement between mean field direction and pseudodisk axis (they are within 15 Degree-Sign ). We also see hints of a magnetic pinch in the source-averaged map. We conclude that core-scale magnetic fields appear to be strong enough to guide gas infall, as predicted by the magnetically regulated models. Finally, we find evidence of a positive correlation between core magnetic field direction and bipolar outflow axis.

  11. Aster jessicae Jessica's aster Status: State Endangered, USFWS Species of Concern

    E-Print Network [OSTI]

    Rank Gss; General Description Robust

    creeping rhizomes that tends to grow in large clumps. Plants grow to be 5 feet tall, but average about 3 feet. The herbage, particularly the upper portion, is covered with a dense, uniform, soft pubescence. Leaves are abundant, broadly lance-shaped and entire. Middle stem leaves generally partially clasp the stem and lower leaves tend to dry up and wither as the season progresses. Flowers are generally numerous, lavender in color, 1-1.5 inches in diameter, and form a broad cluster at the top of the plant. Identification Tips: A. jessicae is distinct in its unusually robust nature, dense pubescence, and cordate leaf bases. The only other aster found in the vicinity of Jessica’s aster is A. occidentalis var. intermedius. This species generally inhabits more mesic microhabitats, has smaller flowers, is less robust, possesses few to no hairs, and lacks cordate leaf bases. Phenology: Flowering occurs in late summer and early fall (from late July through mid September). Fruit and seed maturation occurs in September and early October, with seed dispersal likely in mid to late October. Range: Local endemic; southeastern WA (Whitman Co.) and adjacent ID. Occurs in the Columbia Basin physiographic province. Habitat: The species occurs in Palouse grasslands and prairie/ forest transition zones, often in association with small drainages, but above water level on dry ground, 2500-2800 feet in elevation. It occurs primarily in the following habitat types (Daubenmire 1970): ponderosa pine/snowberry, Idaho fescue/snowberry, black hawthorn/snowberry, Idaho fescue/Nootka rosa, and Douglas fir/ ninebark. Other associated species include bluebunch wheatgrass, balsamroot, and yarrow. ©1955 University of Washington Press. Illustration by John H. Rumely. Known distribution of

  12. The flash pyrolysis and methanolysis of biomass (wood) for production of ethylene, benzene and methanol

    SciTech Connect (OSTI)

    Steinberg, M.; Fallon, P.T.; Sundaram, M.S.

    1990-02-01T23:59:59.000Z

    The process chemistry of the flash pyrolysis of biomass (wood) with the reactive gases, H{sub 2} and CH{sub 4} and with the non-reactive gases He and N{sub 2} is being determined in a 1 in. downflow tubular reactor at pressures from 20 to 1000 psi and temperatures from 600 to 1000{degrees}C. With hydrogen, flash hydropyrolysis leads to high yields of methane and CO which can be used for SNG and methanol fuel production. With methane, flash methanolysis leads to high yields of ethylene, benzene and CO which can be used for the production of valuable chemical feedstocks and methanol transportation fuel. At reactor conditions of 50 psi and 1000{degrees}C and approximately 1 sec residence time, the yields based on pine wood carbon conversion are up to 25% for ethylene, 25% for benzene, and 45% for CO, indicating that over 90% of the carbon in pine is converted to valuable products. Pine wood produces higher yields of hydrocarbon products than Douglas fir wood; the yield of ethylene is 2.3 times higher with methane than with helium or nitrogen, and for pine, the ratio is 7.5 times higher. The mechanism appears to be a free radical reaction between CH{sub 4} and the pyrolyzed wood. There appears to be no net production or consumption of methane. A preliminary process design and analysis indicates a potentially economical competitive system for the production of ethylene, benzene and methanol based on the methanolysis of wood. 10 refs., 18 figs., 1 tab.

  13. Introducing GOLDMine: A new Galaxy Database on the WEB

    E-Print Network [OSTI]

    G. Gavazzi; A. Boselli; A. Donati; P. Franzetti; M. Scodeggio

    2002-12-11T23:59:59.000Z

    The new World Wide Web site "GOLDMine" (Galaxy On Line Database Milano Network) (http://goldmine.mib.infn.it) contains a multiwavelength data-base of an optically selected sample of 3267 galaxies in the Virgo cluster and in the Coma Supercluster. It is designed for professional astronomers who wish to find data and images for these galaxies. Data, gathered in 15 years of observational campaigns by the authors or taken from the literature include general parameters (catalogue names, celestial coordinates, morphological type, recessional velocity etc.); multiwavelength continuum photometry (total UV, U, B, V, J, H, K, FIR and radio magnitudes/flux densities); line photometry (HI, H_2, H_alpha); dynamical parameters (rotational velocity from the HI and H_alpha lines, velocity dispersion) and structural parameters (light concentration index, effective radius and brightness, asymptotic magnitude) in the optical (B and V) and Near Infrared (H or K) bands. Images include finding charts, optical (B and V), H_alpha, Near Infrared (H and/or K) and true color RGB frames (when available). Radial light profiles obtained from the B, V, H or K band images are also available. Integrated optical spectra along with broad Spectral Energy Distributions (SED) from the UV to the radio domain are given. All images can be obtained in JPG format, but the original (reduced) FITS images can be downloaded as well. The database will be updated regularly and will be extended to other local clusters and superclusters. Astronomers who wish to have their images included in GOLDMine are strongly encouraged to send us their material.

  14. Exploratory Technology Research Program for electrochemical energy storage: Annual report for 1993

    SciTech Connect (OSTI)

    Kinoshita, K. [ed.

    1994-09-01T23:59:59.000Z

    The U.S. Department of Energy`s Office of Propulsion Systems provides support for an Electrochemical Energy Storage Program, that includes research and development (R&D) on advanced rechargeable batteries and fuel cells. A major goal of this program is to develop electrochemical power sources suitable for application in electric vehicles (EVs). The program centers on advanced systems that offer the potential for high performance and low life-cycle costs, both of which are necessary to permit significant penetration into commercial markets. The DOE Electrochemical Energy Storage Program is divided into two projects: the Electric Vehicle Advanced Battery Systems (EVABS) Development Program and the Exploratory Technology Research (ETR) Program. The EVABS Program management responsibility has been assigned to Sandia National Laboratories (SNL); Lawrence Berkeley Laboratory (LBL) is responsible for management of the ETR Program. The EVABS and ETR Programs include an integrated matrix of R&D efforts designed to advance progress on selected candidate electrochemical systems. The United States Advanced Battery Consortium (USABC), a tripartite undertaking between DOE, the U.S. automobile manufacturers and the Electric Power Research Institute (EPRI), was formed in 1991 to accelerate the development of advanced batteries for consumer EVs. The role of the FIR Program is to perform supporting research on the advanced battery systems under development by the USABC and EVABS Program, and to evaluate new systems with potentially superior performance, durability and/or cost characteristics. The specific goal of the ETR Program is to identify the most promising electrochemical technologies and transfer them to the USABC, the battery industry and/or the EVABS Program for further development and scale-up. This report summarizes the research, financial and management activities relevant to the ETR Program in CY 1993.

  15. THE 3R ANTHRACITE CLEAN COAL TECHNOLOGY Economical Conversion of Browncoal to Anthracite Type Clean Coal by Low Temperature Carbonization Pre-Treatment Process

    E-Print Network [OSTI]

    Edward Someus

    The pre ven tive pre-treat ment of low grade solid fu els is safer, faster, better, and less costly vs. the “end-of-the-pipe ” post treat ment so lu tions. The “3R ” (Re cy cle-Re duce-Re use) in te grated en vi ron-ment con trol tech nol ogy pro vides pre ven tive pre-treat ment of low grade solid fu els, such as brown coal and con tam i nated solid fu els to achieve high grade cleansed fu els with an thra cite and coke com-pa ra ble qual ity. The goal of the 3R tech nol ogy is to pro vide cost ef fi cient and en vi ron men tally sus-tain able so lu tions by pre ven tive pre-treat ment means for ex tended op er a tions of the solid fuel com-bus tion power plants with ca pac ity up to 300 MWe power ca pac i ties. The 3R An thra cite Clean Coal end prod uct and tech nol ogy may ad van ta geously be in te grated to the oxyfuel – oxy-fir ing, Fos ter Wheeler an thra cite arc-fired util ity type boiler and Heat Pipe Re former tech nol o gies in com bi na tion with CO2 cap ture and stor age pro grams. The 3R tech nol ogy is pat ented orig i nal so lu tion. Ad van tages. Feedstock flex i bil ity: ap pli ca tion of pre-treated multi fu els from wider fuel se lec tion and avail abil ity. Im proved burn ing ef fi ciency. Tech nol ogy flex i bil ity: ef fi cient and ad van ta geous inter-link to proven boiler tech nol o gies, such as oxyfuel and arc-fired boil ers. Near zero pol lut ants for haz ard ous-air-pol lut ants: pre ven tive sep a ra tion of halo gens and heavy met als into small vol ume streams prior uti li za tion of cleansed fu els. ?97 % or ganic sul phur re moval achieved by the 3R ther-

  16. A REDSHIFT SURVEY OF HERSCHEL FAR-INFRARED SELECTED STARBURSTS AND IMPLICATIONS FOR OBSCURED STAR FORMATION

    SciTech Connect (OSTI)

    Casey, C. M.; Budynkiewicz, J. [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Berta, S.; Lutz, D.; Magnelli, B. [Max-Planck-Institut fuer Extraterrestrische Physik, Giessenbachstrasse, 85748 Garching (Germany); Bethermin, M.; Le Floc'h, E.; Magdis, G. [Laboratoire AIM-Paris-Saclay, CEA/DSM/Irfu - CNRS - Universite Paris Diderot, CE-Saclay, pt courrier 131, F-91191 Gif-sur-Yvette (France); Bock, J.; Bridge, C. [California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125 (United States); Burgarella, D. [Laboratoire d'Astrophysique de Marseille - LAM, Universite d'Aix-Marseille and CNRS, UMR7326, 38 rue F. Joliot-Curie, 13388 Marseille Cedex 13 (France); Chapin, E. [Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1 (Canada); Chapman, S. C. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA (United Kingdom); Clements, D. L. [Astrophysics Group, Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2AZ (United Kingdom); Conley, A. [Center for Astrophysics and Space Astronomy 389-UCB, University of Colorado, Boulder, CO 80309 (United States); Conselice, C. J. [School of Physics and Astronomy, University of Nottingham, NG7 2RD (United Kingdom); Cooray, A. [Dept. of Physics and Astronomy, University of California, Irvine, CA 92697 (United States); Farrah, D. [Department of Physics, Virginia Tech, Blacksburg, VA 24061 (United States); Hatziminaoglou, E. [ESO, Karl-Schwarzschild-Str. 2, 85748 Garching bei Muenchen (Germany); Ivison, R. J. [UK Astronomy Technology Centre, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom); and others

    2012-12-20T23:59:59.000Z

    We present Keck spectroscopic observations and redshifts for a sample of 767 Herschel-SPIRE selected galaxies (HSGs) at 250, 350, and 500 {mu}m, taken with the Keck I Low Resolution Imaging Spectrometer and the Keck II DEep Imaging Multi-Object Spectrograph. The redshift distribution of these SPIRE sources from the Herschel Multitiered Extragalactic Survey peaks at z = 0.85, with 731 sources at z < 2 and a tail of sources out to z {approx} 5. We measure more significant disagreement between photometric and spectroscopic redshifts (({Delta}z/(1 + z{sub spec})) = 0.29) than is seen in non-infrared selected samples, likely due to enhanced star formation rates and dust obscuration in infrared-selected galaxies. The infrared data are used to directly measure integrated infrared luminosities and dust temperatures independent of radio or 24 {mu}m flux densities. By probing the dust spectral energy distribution (SED) at its peak, we estimate that the vast majority (72%-83%) of z < 2 Herschel-selected galaxies would drop out of traditional submillimeter surveys at 0.85-1 mm. We find that dust temperature traces infrared luminosity, due in part to the SPIRE wavelength selection biases, and partially from physical effects. As a result, we measure no significant trend in SPIRE color with redshift; if dust temperature were independent of luminosity or redshift, a trend in SPIRE color would be expected. Composite infrared SEDs are constructed as a function of infrared luminosity, showing the increase in dust temperature with luminosity, and subtle change in near-infrared and mid-infrared spectral properties. Moderate evolution in the far-infrared (FIR)/radio correlation is measured for this partially radio-selected sample, with q{sub IR}{proportional_to}(1 + z){sup -0.30{+-}0.02} at z < 2. We estimate the luminosity function and implied star formation rate density contribution of HSGs at z < 1.6 and find overall agreement with work based on 24 {mu}m extrapolations of the LIRG, ULIRG, and total infrared contributions. This work significantly increased the number of spectroscopically confirmed infrared-luminous galaxies at z >> 0 and demonstrates the growing importance of dusty starbursts for galaxy evolution studies and the build-up of stellar mass throughout cosmic time.

  17. Evaluation of the Life History of Native Salmonids in the Malheur River Basin; Cooperative Bull Trout/Redband Trout Research Project, 2000-2001 Annual Report.

    SciTech Connect (OSTI)

    Gonzales, Dan; Schwabe, Lawrence; Wenick, Jess (Burns Paiute Tribe, Department of Fish and Wildlife, Burns, OR)

    2001-08-01T23:59:59.000Z

    The Malheur basin lies within southeastern Oregon. The Malheur River is a tributary to the Snake River, entering at about River Kilometer (RK) 595. The hydrological drainage area of the Malheur River is approximately 12,950 km{sup 2} and is roughly 306 km in length. The headwaters of the Malheur River originate in the Blue Mountains at elevations of 6,500 to 7,500 feet, and drops to an elevation of 2000 feet at the confluence with the Snake River near Ontario, Oregon. The climate of the Malheur basin is characterized by hot dry summers, occasionally exceeding 38 C and cold winters that may drop below -29 C. Average annual precipitation is 300 centimeters and ranges from 100 centimeters in the upper mountains to less than 25 centimeters in the lower reaches (Gonzalez 1999). Wooded areas consist primarily of mixed fir and pine forest in the higher elevations. Sagebrush and grass communities dominate the flora in the lower elevations. Efforts to document salmonid life histories, water quality, and habitat conditions have continued in fiscal year 2000. The Burns Paiute Tribe (BPT), United States Forest Service (USFS), and Oregon Department of Fish and Wildlife (ODFW), have been working cooperatively to achieve this common goal. Bull trout ''Salvenlinus confluentus'' have specific environmental requirements and complex life histories making them especially susceptible to human activities that alter their habitat (Howell and Buchanan 1992). Bull trout are considered to be a cold-water species and are temperature dependent. This presents a challenge for managers, biologists, and private landowners in the Malheur basin. Because of the listing of bull trout under the Endangered Species Act as threatened and the current health of the landscape, a workgroup was formed to develop project objectives related to bull trout. This report will reflect work completed during the Bonneville Power contract period starting 1 April 2000 and ending 31 March 2001. The study area will include the North Fork Malheur River and the Upper Malheur River from Warm Springs Reservoir upstream to the headwaters.

  18. A search for particle dark matter using cryogenic germanium and silicon detectors in the one- and two- tower runs of CDMS-II at Soudan

    SciTech Connect (OSTI)

    Ogburn, Reuben Walter, IV; /Stanford U., Phys. Dept.

    2008-04-01T23:59:59.000Z

    Images of the Bullet Cluster of galaxies in visible light, X-rays, and through gravitational lensing confirm that most of the matter in the universe is not composed of any known form of matter. The combined evidence from the dynamics of galaxies and clusters of galaxies, the cosmic microwave background, big bang nucleosynthesis, and other observations indicates that 80% of the universe's matter is dark, nearly collisionless, and cold. The identify of the dar, matter remains unknown, but weakly interacting massive particles (WIMPs) are a very good candidate. They are a natural part of many supersymmetric extensions to the standard model, and could be produced as a nonrelativistic, thermal relic in the early universe with about the right density to account for the missing mass. The dark matter of a galaxy should exist as a spherical or ellipsoidal cloud, called a 'halo' because it extends well past the edge of the visible galaxy. The Cryogenic Dark Matter Search (CDMS) seeks to directly detect interactions between WIMPs in the Milky Way's galactic dark matter halo using crystals of germanium and silicon. Our Z-sensitive ionization and phonon ('ZIP') detectors simultaneously measure both phonons and ionization produced by particle interactions. In order to find very rare, low-energy WIMP interactions, they must identify and reject background events caused by environmental radioactivity, radioactive contaminants on the detector,s and cosmic rays. In particular, sophisticated analysis of the timing of phonon signals is needed to eliminate signals caused by beta decays at the detector surfaces. This thesis presents the firs two dark matter data sets from the deep underground experimental site at the Soudan Underground Laboratory in Minnesota. These are known as 'Run 118', with six detectors (1 kg Ge, 65.2 live days before cuts) and 'Run 119', with twelve detectors (1.5 kg Ge, 74.5 live days before cuts). They have analyzed all data from the two runs together in a single, combined analysis, with sensitivity to lower-energy interactions, careful control of data quality and stability, and further development of techniques for reconstructing event location and rejecting near-surface interactions from beta decays. They also present a revision to the previously published Run 119 analysis, a demonstration of the feasibility of a low-threshold (1 or 2 keV) analysis of Soudan data, and a review of the literature on charge generation and quenching relevant to the ionization signal.

  19. Final report on the project entitled "The Effects of Disturbance & Climate on Carbon Storage & the Exchanges of CO2 Water Vapor & Energy Exchange of Evergreen Coniferous Forests in the Pacific Northwest: Integration of Eddy Flux, Plant and Soil Measurements at a Cluster of Supersites"

    SciTech Connect (OSTI)

    Beverly E. Law (PI), Christoph K. Thomas (CoI)

    2011-09-20T23:59:59.000Z

    This is the final technical report containing a summary of all findings with regard to the following objectives of the project: (1) To quantify and understand the effects of wildfire on carbon storage and the exchanges of energy, CO2, and water vapor in a chronosequence of ponderosa pine (disturbance gradient); (2) To investigate the effects of seasonal and interannual variation in climate on carbon storage and the exchanges of energy, CO2, and water vapor in mature conifer forests in two climate zones: mesic 40-yr old Douglas-fir and semi-arid 60-yr old ponderosa pine (climate gradient); (3) To reduce uncertainty in estimates of CO2 feedbacks to the atmosphere by providing an improved model formulation for existing biosphere-atmosphere models; and (4) To provide high quality data for AmeriFlux and the NACP on micrometeorology, meteorology, and biology of these systems. Objective (1): A study integrating satellite remote sensing, AmeriFlux data, and field surveys in a simulation modeling framework estimated that the pyrogenic carbon emissions, tree mortality, and net carbon exchange associated with four large wildfires that burned ~50,000 hectares in 2002-2003 were equivalent to 2.4% of Oregon statewide anthropogenic carbon emissions over the same two-year period. Most emissions were from the combustion of the forest floor and understory vegetation, and only about 1% of live tree mass was combusted on average. Objective (2): A study of multi-year flux records across a chronosequence of ponderosa pine forests yielded that the net carbon uptake is over three times greater at a mature pine forest compared with young pine. The larger leaf area and wetter and cooler soils of the mature forest mainly caused this effect. A study analyzing seven years of carbon and water dynamics showed that interannual and seasonal variability of net carbon exchange was primarily related to variability in growing season length, which was a linear function of plant-available soil moisture in spring and early summer. A multi-year drought (2001-2003) led to a significant reduction of net ecosystem exchange due to carry-over effects in soil moisture and carbohydrate reserves in plant-tissue. In the same forest, the interannual variability in the rate carbon is lost from the soil and forest floor is considerable and related to the variability in tree growth as much as it is to variability in soil climatic conditions. Objective (3): Flux data from the mature ponderosa pine site support a physical basis for filtering nighttime data with friction velocity above the canopy. An analysis of wind fields and heat transport in the subcanopy at the mesic 40-year old Douglas site yielded that the non-linear structure and behavior of spatial temperature gradients and the flow field require enhanced sensor networks to estimate advective fluxes in the subcanopy of forest to close the surface energy balance in forests. Reliable estimates for flux uncertainties are needed to improve model validation and data assimilation in process-based carbon models, inverse modeling studies and model-data synthesis, where the uncertainties may be as important as the fluxes themselves. An analysis of the time scale dependence of the random and flux sampling error yielded that the additional flux obtained by increasing the perturbation timescale beyond about 10 minutes is dominated by random sampling error, and therefore little confidence can be placed in its value. Artificial correlation between gross ecosystem productivity (GEP) and ecosystem respiration (Re) is a consequence of flux partitioning of eddy covariance flux data when GEP is computed as the difference between NEE and computed daytime Re (e.g. using nighttime Re extrapolated into daytime using soil or air temperatures). Tower-data must be adequately spatially averaged before comparison to gridded model output as the time variability of both is inherently different. The eddy-covariance data collected at the mature ponderosa pine site and the mesic Douglas fir site were used to develop and evaluate a new method to extra

  20. Predicting the impacts of climate change on animal distributions: the importance of local adaptation and species' traits

    SciTech Connect (OSTI)

    HELLMANN, J. J.; LOBO, N. F.

    2011-12-20T23:59:59.000Z

    The geographic range limits of many species are strongly affected by climate and are expected to change under global warming. For species that are able to track changing climate over broad geographic areas, we expect to see shifts in species distributions toward the poles and away from the equator. A number of ecological and evolutionary factors, however, could restrict this shifting or redistribution under climate change. These factors include restricted habitat availability, restricted capacity for or barriers to movement, or reduced abundance of colonists due the perturbation effect of climate change. This research project examined the last of these constraints - that climate change could perturb local conditions to which populations are adapted, reducing the likelihood that a species will shift its distribution by diminishing the number of potential colonists. In the most extreme cases, species ranges could collapse over a broad geographic area with no poleward migration and an increased risk of species extinction. Changes in individual species ranges are the processes that drive larger phenomena such as changes in land cover, ecosystem type, and even changes in carbon cycling. For example, consider the poleward range shift and population outbreaks of the mountain pine beetle that has decimated millions of acres of Douglas fir trees in the western US and Canada. Standing dead trees cause forest fires and release vast quantities of carbon to the atmosphere. The beetle likely shifted its range because it is not locally adapted across its range, and it appears to be limited by winter low temperatures that have steadily increased in the last decades. To understand range and abundance changes like the pine beetle, we must reveal the extent of adaptive variation across species ranges - and the physiological basis of that adaptation - to know if other species will change as readily as the pine beetle. Ecologists tend to assume that range shifts are the dominant response of species to climate change, but our experiments suggest that other processes may act in some species that reduce the likelihood of geographic range change. In the first part of our DOE grant (ending 2008) we argued that the process of local adaptation of populations within a species range, followed by climatic changes that occur too quickly for adaptive evolution, is an underappreciated mechanism by which climate change could affect biodiversity. When this process acts, species ranges may not shift readily toward the poles, slowing the rate of species and biome change. To test this claim, we performed an experiment comparing core and peripheral populations in a series of field observations, translocation experiments, and genetic analyses. The papers in Appendix A were generated from 2005-2008 funding. In the second part of the DOE grant (ending 2011) we studied which traits promote population differentiation and local adaptation by building genomic resources for our study species and using these resources to reveal differences in gene expression in peripheral and core populations. The papers in Appendix B were generated from 2008-2011 funding. This work was pursued with two butterfly species that have contrasting life history traits (body size and resource specialization) and occupy a common ecosystem and a latitudinal range. These species enabled us to test the following hypotheses using a single phylogenetic group.

  1. NGC 2207/IC 2163: A GRAZING ENCOUNTER WITH LARGE-SCALE SHOCKS

    SciTech Connect (OSTI)

    Kaufman, Michele [Department of Physics, Ohio State University, 191 West Woodruff Ave, Columbus, OH 43210 (United States); Grupe, Dirk [Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Lab, University Park, PA 16802 (United States); Elmegreen, Bruce G. [IBM Research Division, T. J. Watson Research Center, P.O. Box 218, Yorktown Heights, NY 10598 (United States); Elmegreen, Debra M. [Department of Physics and Astronomy, Vassar College, 124 Raymond Ave., Poughkeepsie, NY 12604 (United States); Struck, Curtis [Department of Physics and Astronomy, Iowa State University, Ames, IA 50011 (United States); Brinks, Elias, E-mail: rallis.1@osu.edu, E-mail: dxg35@psu.edu, E-mail: bge@us.ibm.com, E-mail: elmegreen@vassar.edu, E-mail: curt@iastate.edu, E-mail: E.Brinks@herts.ac.uk [Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield AL10 9AB (United Kingdom)

    2012-11-01T23:59:59.000Z

    Radio continuum, Spitzer infrared, optical, and XMM-Newton X-ray and ultraviolet observations (UVW1 and UVM2) are used to study large-scale shock fronts, young star complexes, and the galactic nuclei in the interacting galaxies NGC 2207/IC 2163. There are two types of large-scale shock fronts in this galaxy pair. The large-scale shock front along the rim of the ocular oval in IC 2163 has produced vigorous star formation in a dusty environment, bright in the Spitzer 8 {mu}m and 24 {mu}m images. In the outer part of the companion side of NGC 2207, a large-scale front attributed to halo scraping is particularly bright in the {lambda}6 cm and {lambda}20 cm radio continuum but not in any tracers of recent star formation (H{alpha}, 8 {mu}m, 24 {mu}m, or ultraviolet emission) or in X-rays. This radio-continuum front may be from compression of the halo magnetic field on the back side of NGC 2207, between the two galaxies. The X-ray emission sets an upper limit to the gas density in the halo. Values of the flux density ratio S{sub {nu}}(8 {mu}m)/S{sub {nu}}(6 cm) of prominent, kiloparsec-size, Spitzer/IRAC star-forming clumps in NGC 2207/IC 2163 are compared with those of giant radio H II regions in M81. For the bright clumps in NGC 2207, the mean value of this ratio is the same as for the M81 H II regions, whereas for the bright clumps on the rim of the IC 2163 ocular oval, the mean value is nearly a factor of two greater. Possible explanations for this are discussed. The galaxy pair has global values of the ratios of infrared-to-radio continuum flux density in the Spitzer 8 {mu}m, 24 {mu}m, and 70 {mu}m bands, and the IRAS FIR significantly below the medians/means for large samples of galaxies. Feature i, a mini-starburst on an outer arm of NGC 2207 on its anti-companion side, is the most luminous 8 {mu}m, 24 {mu}m, 70 {mu}m, radio continuum, and H{alpha} source in the galaxy pair. We find evidence that a radio supernova was present in the core of feature i in 2001. X-ray emission is detected from the nucleus of NGC 2207 and from nine discrete sources whose X-ray luminosities make them possible candidates for Ultraluminous X-ray sources. One of these corresponds with the Type Ib SN 1999ec, which is also bright in the ultraviolet, and another may be a radio supernova or a background quasar. The X-ray luminosity of the NGC 2207 nucleus is log L{sub 0.3-10.0keV} = 40.6 erg s{sup -1}, which, together with its X-ray spectrum, suggests that this is a highly absorbed, low-luminosity, active galactic nucleus.