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BeppoSAX observations of GRO J1744-28  

E-Print Network [OSTI]

We present an analysis of BeppoSAX observations of the unique transient bursting X-ray pulsar GRO J1744-28. The observations took place in March 1997 during the decay phase of the outburst. We find that the persistent broadband X-ray continuum of the source is consistent with a cutoff power law typical for the accreting pulsars. We also detect the fluorescence iron line at 6.7 keV and an absorption feature at ~4.5 keV, which we interpret as a cyclotron line. The corresponding magnetic field strength in the line forming region is ~3.7 x 10^11 G. Neither line is detected in the spectra of the bursts. However, additional soft thermal component with kT ~2 keV was required to describe the burst spectrum. We briefly discuss the nature of this component and argue that among other possibilities it might be connected with thermonuclear flashes at the neutron star surface which accompany the accretion-powered bursts in the source.

Doroshenko, R; Doroshenko, V; Suleimanov, V; Piraino, S



Exploring the structural dynamics of the E. coli chaperonin GroEL using translation-libration-screw crystallographic refinement of intermediate states  

SciTech Connect (OSTI)

Large rigid-body domain movements are critical to GroEL-mediated protein folding, especially apical domain elevation and twist associated with the formation of a folding chamber upon binding ATP and co-chaperonin GroES. Here, we have modeled the anisotropic displacements of GroEL domains from various crystallized states, unliganded GroEL, ATP?S-bound, ADP-AlFx/GroES-bound, and ADP/GroES bound, using translation-libration-screw (TLS) analysis. Remarkably, the TLS results show that the inherent motions of unliganded GroEL, a polypeptide-accepting state, are biased along the transition pathway that leads to the folding-active state. In the ADP-AlFx/GroES-bound folding-active state the dynamic modes of the apical domains become reoriented and coupled to the motions of bound GroES. The ADP/GroES complex exhibits these same motions, but they are increased in magnitude, potentially reflecting the decreased stability of the complex after nucleotide hydrolysis. Our results have allowed the visualization of the anisotropic molecular motions that link the static conformations previously observed by X-ray crystallography. Application of the same analyses to other macromolecules where rigid body motions occur may give insight into the large scale dynamics critical for function and thus has the potential to extend our fundamental understanding of molecular machines.

Chaudhry, Charu; Horwich, Arthur L.; Brunger, Axel T.; Adams, Paul D.



Chesapeake Solar LLC a groSolar company | 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 REPORT Americium/CuriumSunways JVGroup IndiaChangtu LiaonengLLC a groSolar


Spectral Evolution of the Continuum and Disc Line in Dipping in GRO J1655-40  

E-Print Network [OSTI]

The discovery is reported of emission features in the X-ray spectrum of GRO J1655-40 obtained using Rossi-XTE on 1997, Feb 26. The features have been fitted firstly by two Gaussian lines, which in four spectra have average energies of 5.85+/-0.08 keV and 7.32+/-0.13 keV, strongly suggestive that these are the red- and blueshifted wings of an iron disc line from material with velocity ~0.33 c. The blue wing is apparently less bright than expected for a disc line subject to Doppler boosting, however, known absorption in the spectrum of GRO J1655-40 at energies between ~7 and 8 keV can reduce the apparent brightness of the blue wing. The spectra have also been fitted well using the full relativistic disc line model of Laor, plus an absorption line. This gives a restframe energy between 6.4 and 6.8 keV indicating that the line is from highly ionized iron K_alpha. The Laor model also shows that the line originates at radii extending from ~10 Schwarzschild radii (r_S) outwards. The line is direct evidence for the black hole nature of the compact object. The continuum is well described by dominant disc blackbody emission plus Comptonized emission. During dipping, spectral evolution is well modelled by allowing progressive covering of the disc blackbody and simple absorption of the Comptonized emission showing that the thermal emission is more extended. Acceptable fits are only obtained by including the disc line in the covering term, indicating that it originates in the same inner disc region as the thermal continuum. Dip ingress times and durations are used to provide the radius of the disc blackbody emitter as 170-370 r_S, and the radius of the absorber.

M. Balucinska-Church



Discovery of a 450 Hz QPO from the Microquasar GRO J1655-40 with RXTE  

E-Print Network [OSTI]

We report the discovery with the proportional counter array (PCA) onboard the Rossi X-ray Timing Explorer (RXTE) of a 450 Hz quasiperiodic oscillation (QPO) in the hard X-ray flux from the galactic microquasar GRO J1655-40. This is the highest frequency QPO modulation seen to date from a black hole. The QPO is detected only in the hard X-ray band above 13 keV. It is both strong and narrow, with a typical rms amplitude of 4.5 % in the 13 - 27 keV range, and a width of 40 Hz (FWHM). For two observations in which we detect the 450 Hz QPO a previously known 300 Hz QPO is also observed in the 2 - 13 keV band. We show that these two QPO sometimes appear simultaneously, thus demonstrating the first detection of a pair of high frequency QPO in a black hole system. Prior to this, pairs of high frequency QPO have only been detected in neutron star systems. GRO J1655-40 is one of only a handful of black hole systems with a good dynamical mass constraint. For a non-rotating black hole with mass between 5.5 - 7.9 solar masses, the innermost stable circular orbit (ISCO) ranges from 45 - 70 km. For any mass in this range the radius at which the orbital frequency reaches 450 Hz is less than the ISCO radius, indicating that if the modulation is caused by Kepler motion, the black hole must have appreciable spin. If the QPO frequency is set by the orbital frequency of matter at the ISCO then for this mass range the dimensionless angular momentum lies between 0.15 < j < 0.5. Moreover, if the modulation is caused by oscillation modes in the disk or Lense-Thirring precession, then this would also require a rapidly rotating hole. We briefly discuss the implications of our findings for models of X-ray variability in black holes and neutron stars.

Tod E. Strohmayer



Thermonuclear Burning on the Accreting X-Ray Pulsar GRO J1744-28  

E-Print Network [OSTI]

We investigate the thermal stability of nuclear burning on the accreting X-ray pulsar GRO J1744-28. The neutron star's dipolar magnetic field is thermonuclear instabilities are unlikely causes of the hourly bursts seen at very high accretion rates. We then discuss how the stability of the thermonuclear burning depends on both the global accretion rate and the neutron star's magnetic field strength. We emphasize that the appearance of the instability (i.e., whether it looks like a Type I X-ray burst or a flare lasting a few minutes) will yield crucial information on the neutron star's surface magnetic field and the role of magnetic fields in convection. We suggest that a thermal instability in the accretion disk is the origin of the long (~300 days) outburst and that the recurrence time of these outbursts is >50 years. We also discuss the nature of the binary and point out that a velocity measurement of the stellar companion (most likely a Roche-lobe filling giant with m_K>17) will constrain the neutron star mass.

Lars Bildsten; Edward F. Brown



GRO J1744-28, search for the counterpart: infrared photometry and spectroscopy  

E-Print Network [OSTI]

Using VLT/ISAAC, we detected 2 candidate counterparts to the bursting pulsar GRO J1744-28, one bright and one faint, within the X-ray error circles of XMM-Newton and Chandra. In determining the spectral types of the counterparts we applied 3 different extinction corrections; one for an all-sky value, one for a Galactic Bulge value and one for a local value. We find the local value, with an extinction law of alpha = 3.23 +- 0.01 is the only correction that results in colours and magnitudes for both bright and faint counterparts consistent with a small range of spectral types, and for the bright counterpart, consistent with the spectroscopic identification. Photometry of the faint candidate indicates it is a K7/M0 V star at a distance of 3.75 +- 1 kpc. This star would require a very low inclination angle (i inclination of i >= 15deg; a stripped giant, or a main sequence M3+ V star are consistent with this mass-function constraint. In both cases mass-transfer, if present, will be by wind-accretion as the counterpart will not fill its Roche lobe given the observed orbital period. The derived magnetic field of 2.4 x 10^{11} G will inhibit accretion by the propeller effect, hence its quiescent state.

Andrew J. Gosling; Reba M. Bandyopadhyay; James C. A. Miller-Jones; S. A. Farrell



activation analysis wth: Topics by E-print Network  

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

treated cocoa, and untreatec, cocoa) and a total analyze'1 by activation sr'tn thermal reactor neutrons gamma ? ray spec . rometry . The ana' ysis o-. cccc- in... Analysis...


Suggestions for Weed Control in Peanuts  

E-Print Network [OSTI]

(bentazon) w eed seedlings other details . T reat when broadleaf w e eds are nutsedge B ASF when peanut small and activ ely gro wing. Does not control gro wth stages are grasses . F or y ello w nutsedge , tw o applications are bunching to preferred . When...- (acifluorfen) stages listed on the herbicides . Do not use tr eated plants f or feed bur , da yflo w e r , spurred Basagr an 4E? 1 to 2 pts . label, but generally o r fo ra g e . anoda, y ello w nutsedge , (bentazon) 2- to 8-leaf stage . coffee senna, giant...

Baumann, Paul A.; Lemon, Robert G.



Jefferson Lab Signs Contract Wth SensL For Silicon Photomultiplier  

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 MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfraredJefferson Lab Click onLaser TwinklesJeffersonNuclear


GroSolar | 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 County is a county in Oklahoma. ItsGrid2Home


9 Science Service Feature Dec. 17, 1934 7 THE WThTEfZ ? Mailed Dec. 10, 1934  

E-Print Network [OSTI]

on Meteorolog iviany o r all cyclones of the tempi-ate zone axe now thought t o ori;.inate in the interplsy of conflictin& air currents d o n g a t'frontl' separating masses Qf air diff erinL in direction, teiqerature and humidity. \\That doout tro.?ical cyclones? The l a t t e r are smgposed t o be formed exclusively i n


Rule-based modelling with the XL/GroIMP software Ole Kniemeyer  

E-Print Network [OSTI]

additional code of technical nature. Such a technical overhead reduces the simplicity and clarity, ultimatively, the design of such a language. The "historic roots" of RGG are founded in L a line, turn left by 60 and turn right by 60 respectively. F++F++F F-F++F-F++F-F++F-F++F-F++F-F three

Kurth, Winfried


On the development of a GroEL based platform for identifying pharmacological chaperones  

E-Print Network [OSTI]

1 CHAPTER 1: ON THE NEED FOR A PLATFORM FOR IDENTIFYING PHARMACOLOGICAL CHAPERONES 1.1 Protein misfolding and proteostasis. 1.1.1 Protein folding and misfolding. a Protein folding and function. Proteins are crucial for all essential life... years. Some of the initial studies in the field of protein folding were performed by Linus Pauling and E.J. Corey, who first discovered that polypeptides form secondary structure elements such as alpha helices and beta sheets (1). Later, Christian...

Naik, Subhashchandra



GroSolar formerly Global Resource Options 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 Home Page on Office of Inspector GeneralDepartmentAUDIT REPORTOpen EnergyBoard" form. ToGestionSolar IncGreenvest


eww F engewF wthF wehF VH @PHHHA PD IIQIQT uEuoD vFY iiogluD sF uF  

E-Print Network [OSTI]

pulished in the literture s prtiulr sesF sn uEuo nd heng PHD we present the omputtionl formultion for stti is disussed in uthors nd heng PSF e provide the omputE tionl formultion for dynmi nlysis of geometrillyEext sndwih ems in uEuo nd heng IWD PID toE gether with extensive numeril exmples tht involve lrge deformtion

Vu-Quoc, Loc



E-Print Network [OSTI]

MODELOS PARA PREVIS�O DE NOTAS DE AVALIA��O SENSORIAL DE BEBIDA DE CAF� ARÁBICA COM BASE NA atributos sensoriais com base no perfil cromatográfico dos voláteis de grãos de café arábica torrado as ferramentas empregadas na análise dos dados. As notas previstas pelos modelos gerados para acidez, amargor

Ferreira, Márcia M. C.


B y M E R E D I T H F R A N C O M The ground shakes. The gro-  

E-Print Network [OSTI]

Hazardous Being safe in an earthquake is all about location. Listed below are several safer places as well injury Stairs: they could collapse Trees: if outside Overhead power lines and light poles: if outside Parties, Hosted by Clark Planetarium: 4 p.m., locations: unvr.se/JPyak6 THURSDAY 6/7 Saratoga Splash

Seamons, Kent E.


Wood Fuel Future: The Potential Web Text December 2010  

E-Print Network [OSTI]

Wth for one family, with larger scale systems of 1 MWth heating 200 houses. Small scale wood fuel electricity provide electricity for up to 30,000 houses. Many electricity generating systems also produce heat and are called Combined Heat and Power systems. kWth = kilowatt thermal (i.e. heat) kWe = kilowatt electricity


REU 2006: SCHEDULE FOR WEEKS THREE AND FOUR Morning talks (apprentice): Ryerson 251  

E-Print Network [OSTI]

REU 2006: SCHEDULE FOR WEEKS THREE AND FOUR Morning talks (apprentice): Ryerson 251 Afternoon talks: Eckhart 206 MWF Ryerson 251 TTh Date YSP Abert/Babai Abert Babai Farb Fiore Apprentice Problems Discrete: YSP: 9:30­2:30 WThF Abert/Babai (Apprentice): 9:30­12:00 WThF Abert (Problems and theorems): 2

Babai, László

Note: This page contains sample records for the topic "djusted gro wth" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


REU 2006: SCHEDULE FOR WEEKS THREE AND FOUR Morning talks (apprentice): Ryerson 251  

E-Print Network [OSTI]

REU 2006: SCHEDULE FOR WEEKS THREE AND FOUR Morning talks (apprentice): Ryerson 251* * | | | | | | Apprentice |Problems | Discrete | | * * | | | | | | Ryerson 251 |R251/E in summary form: THIRD WEEK: YSP: 9:30-2:30 WThF Abert/Babai (Apprentice): 9:30-12:00 WThF Abert

May, J. Peter


Local transport in Joint European Tokamak edge-localized, high-confinement mode plasmas with H, D, DT, and T isotopes  

E-Print Network [OSTI]

-mode and the scaling of the global thermal energy confinement time, E .4 Large extrapolations of the energy confinement- mated using the total electron number, Ne and the total ther- mal energy, Wth , i.e., * AWth /(NeB), Wth and plasma current varied together in H, D, DT, and T isotopes. The local energy transport in more than fifty

Budny, Robert


Jeff Martin (U. Winnipeg) Collaborators: J.D. Bowman, J. Birchall, L. Buchmann, L. Clarke, C. Davis, B.W. Filippone,  

E-Print Network [OSTI]

, B. Plaster, I. Tanihata, W.T.H. van Oers, Y. Watanabe, S. Yamashita, T. Yoshioka (Winnipeg, Manitoba.D. Bowman, B. Filippone, T. Ito, B. Plaster #12;UCN Quantum States in Gravity Quantized energy leve

Martin, Jeff


Downdraft Gasification Of Various Biomass Feedstocks For Energy Production.  

E-Print Network [OSTI]

?? Gasification of biomass for energy production has the potential to be a cost effective and environmentally sustainable technology. Small scale, 20-250 kWth, downdraft gasifiers… (more)

Roesch, Hans Patric



Systems integration and analysis of advanced life support technologies  

E-Print Network [OSTI]

................................................................................... 17 3.1. Methodical Analysis of ALS Technologies.............................................. 17 3.2. Computer-Aided Analysis ........................................................................ 18 4 METHODS OF ANALYSIS... requirement of the system [kWth] Ceq Mass equivalency factor for the cooling infrastructure [kg/kWth] CT Total crewtime requirement of the system [CM-h/y] D Duration of the mission segment of interest [y] CTeq Mass equivalency factor for the crewtime...

Nworie, Grace A.



adolescents reporting high: Topics by E-print Network  

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

ARA Gro G520T Egrett high altitude research aircraft with three BAT probes. NOAA ARL Monthly Activity Report Geosciences Websites Summary: The ARA Gro G520T Egrett high...


The Periplasmic Cavity of LacY Mutant Cys154 -> Gly: How Open Is Open?  

E-Print Network [OSTI]

GroEL-GroES- mediated protein folding. Chem. Rev. 106, 1917–of chaperone-mediated protein folding in the cytosol. Nat.that impair membrane protein folding and generate a membrane

Jiang, X; Driessen, AJM; Feringa, BL; Kaback, HR



YidC protein, a molecular chaperone for LacY protein folding via the SecYEG protein machinery  

E-Print Network [OSTI]

GroEL-GroES- mediated protein folding. Chem. Rev. 106, 1917–of chaperone-mediated protein folding in the cytosol. Nat.that impair membrane protein folding and generate a membrane

Zhu, L; Kaback, HR; Dalbey, RE



Curriculum vitae Bernd Knll  

E-Print Network [OSTI]

Curriculum vitae Bernd Knöll Schulbildung 1985 ­ 1992 Max-Planck-Gymnasium Gro�-Umstadt Zivildienst

Ulm, Universität


http://tti.tamu.edu > Variable message signs > Traffic actuated controllers > Traffic signals > Flashing traffic signals > Lane use control signals > Road markings > Rumble strips > Warrants (Traffic control devices) > Gro  

E-Print Network [OSTI]

agencies and private- sector companies on the design, construction, testing and evaluation of highway railings > Transportation corridors > Streambeds > Pipelin Street lighting > Freeways > Highways > Arterial > Light emitting diodes > Portable equipment > Construction equipment > Roadbuilding machinery


Thomas Hebbeker Der Tanz der  

E-Print Network [OSTI]

von Tycho Brahe) Newton , 1684: Periode groÃ?e Halbachse gemeinsame Zentralmasse 32 ~ aP 2 2 a mM Gam

Hebbeker, Thomas


A stoichiometric model of Escherichia coli 's macromolecular synthesis machinery and its integration with metabolism  

E-Print Network [OSTI]

Protein Folding. . . . . . . . . . . . . . . . . . . . . . . . . . .of chaperonin-dependent protein folding in Escherichia coli.Chaperonin-mediated protein folding at the surface of groEL

Thiele, Ines



als teil des: Topics by E-print Network  

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

1990: TBL prgt Begriff "World Wide Web" - Beginn eines gro?en Hypertext Zachmann, Gabriel 4 Whitehead's Ausdehnungslehre Die Kapitel II und III im Teil IV von...


anlagentechnischen grundlagen des: Topics by E-print Network  

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

1990: TBL prgt Begriff "World Wide Web" - Beginn eines gro?en Hypertext Zachmann, Gabriel 8 STRUKTURELLE GRUNDLAGEN UND MECHANIK VON ZYTOGELEN Biology and Medicine...


Characterization of EER4 and SAR1 in Relation to Their Role in Ethylene Signaling and Dampening Responses  

E-Print Network [OSTI]

Sylvania Cool White fluorescent bulbs, Danvers, MA) at 20 oSylvania Gro-Lite fluorescent bulbs, Danvers, MA) at 21 o C

Robles, Linda



High Heat Flux Erosion of Carbon Fibre Composite Materials in the TEXTOR Tokamak*  

E-Print Network [OSTI]

,. 1. * . High Heat Flux Erosion of Carbon Fibre Composite Materials in the TEXTOR Tokamak Erosion of Carbon Fibre composite Materials in the TEXTOR Tokamak H. Bolt, T. Scholz, J. Boedo*, KH. The materials tested were carbon fibre reinforced materials w"th and without Si-addition. The probe w

Harilal, S. S.


Factors contributing to carbon fluxes from bioenergy harvests in the U.S. Northeast: an analysis using  

E-Print Network [OSTI]

of fossil fuels for energy production (`bioenergy' such as combusting woodchips or pellets for electricity reductions and net fluxes immediately postharvest from whole-tree harvests (WTH), bioenergy harvests without products and C emissions from energy generation from harvested sites, including indirect emissions from

Vermont, University of


JOURNAL DE PHYSIQUE IV Colloque C5,suppltment au Journal de Physique 11, Volume 5,juin 1995  

E-Print Network [OSTI]

IS mass-spectrometry coupled wth mass-analyzed Ion h e b c energy spectrometry. Trad of Sciences of Ukraine, Prosp. Palladina 32/34, Kiev-142, UA-252142, Ukraine * Padua Research Area Mass-Spectrometry application for obtaining of functional coatings and materials. This technique allows to create advanced high

Paris-Sud XI, Université de


Nuclear Instruments and Methods in Physics Research A 356 (1995) l-4 INSTRUMENTS  

E-Print Network [OSTI]

ELSEVIER Nuclear Instruments and Methods in Physics Research A 356 (1995) l-4 NUCLEAR INSTRUMENTS 8 METHODS IN PHYSICS REgtR?n Thermodynamics of dynamic nuclear polarization W.Th. Wenckebach Faculty ofApplied Physics, Delfr Unicersity of Technology, P.O.B. 5046, 2600 GA De& The Netherlands Abstract Dynamic nuclear

Dutz, Hartmut


ELSEVIER Computational Stallstlc~ & Data Analys~,; 21 11996) 193 214 COMPUTATIONAl.  

E-Print Network [OSTI]

-efficient frontier,'" that is, the set of estimates that are mimmaUy incompatible w~th a specified set of model. As will be discussed more carefully in subsequent sections, the actual data generating process is assumed to be descri

Tesfatsion, Leigh

Note: This page contains sample records for the topic "djusted gro wth" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


Studying Protein Flexibility in a Statistical Framework: Tools and Databases for Analyzing Structures and Approaches for Mapping  

E-Print Network [OSTI]

to the development by James Watt in 1769 of the double-action steam engine. James Watt's major contribution 1A and 1B). Thus, the conceptual framework of mechanical engineering may be as appropriate example of is the work by Sigler et al. on GroEL. They discussed GroEL as a two-stroke engine1 in analogy

Gerstein, Mark


Thin film growth and characterization of Potassium-Tantalate-Niobate room temperature ferroelectric  

E-Print Network [OSTI]

is al&says present in the solution due to additiou ol &cscess solute &naterial or due ]o cooliug ol the solutiou belov' its liquidus tempera]ure. Spon], aueous uuclea], ion ac], iva]es gro&vth. 3. Sl, ep-cooled gro&vth: The gro&vth occurs at a..., cvlindrica] sl eel rod ivas iiiscrtcd which ivould serve as flic seai foi I lie alumina. crucible. An S-type (Pt. ? 10'zh Pt/Ri&) thermo& ouple inserted throuzli this rod gives Ihe temperature at the bottom of the crucible. 39 The furnace was modified...

Muntha, Nageswara Rao Venkat



Effect of Gaseous Impurities on Long-Term Thermal Cycling and Aging Properties of Complex Hydrides for Hydrogen Storage  

SciTech Connect (OSTI)

This program was dedicated to understanding the effect of impurities on Long-Term Thermal Cycling and aging properties of Complex Hydrides for Hydrogen Storage. At the start of the program we found reversibility between Li2NH+LiH ? LiH+LiNH2 (yielding ~5.8 wt.%H capacity). Then we tested the effect of impurity in H2 gas by pressure cycling at 255oC; first with industrial gas containing ppm levels of O2 and H2O as major impurities. Both these impurities had a significant impact on the reversibility and decreased the capacity by 2.65 wt.%H. Further increase in number of cycles from 500 to 1100 showed only a 0.2 wt%H more weight loss, showing some capacity is still maintained after a significant number of cycles. The loss of capacity is attributed to the formation of ~55 wt% LiH and ~30% Li2O, as major contaminant phases, along with the hydride Li2NH phase; suggesting loss of nitrogen during cycling. The effect of 100 ppm H2O in H2 also showed a decrease of ~2.5 wt.%H (after 560 cycles), and 100ppm O2 in H2; a loss of ~4.1 wt.%. Methane impurity (100 ppm, 100cycles), showed a very small capacity loss of 0.9 wt.%H under similar conditions. However, when Li3N was pressure cycled with 100ppmN2-H2 there were beneficial effects were observed (255oC); the reversible capacity increased to 8.4wt.%H after 853 cycles. Furthermore, with 20 mol.%N2-H2 capacity increased to ~10 wt.%H after 516 cycles. We attribute this enhancement to the reaction of nitrogen with liquid lithium during cycling as the Gibbs free energy of formation of Li3N (?Go = -98.7 kJ/mol) is more negative than that of LiH (?Go = -50.3 kJ/mol). We propose that the mitigation of hydrogen capacity losses is due to the destabilization of the LiH phase that tends to accumulate during cycling. Also more Li2NH phase was found in the cycled product. Mixed Alanates (3LiNH2:Li3AlH6) showed that 7 wt% hydrogen desorbed under dynamic vacuum. Equilibrium experiments (maximum 12 bar H2) showed up to 4wt% hydrogen reversibly stored in the material after the first desorption. The activation energy was found to be 51 kJ/mol, as compared to 81 kJ/mol for pure lithium alanate. It is proposed that based on the data obtained and CALPHAD modeling that the improvement in cycling is due to the formation of pure lithium (liquid at 255oC), which is able to react with nitrogen specifically forming Li3N. The presence of nitrogen in the 80/20 molar mixtures in a hydride bed along with hydrogen causes Li to form Li3N rather than LiH, and subsequently regenerates the Li2NH phase and yields a ~10 wt.%H reversibly.

Chandra, Dhanesh (Primary Contact); Lamb, Joshua; Chien, Wen-Ming; Talekar, Anjali; and Pal, Narendra.



Commercial Fertilizers in 1925-26.  

E-Print Network [OSTI]

EXPERIMENT STATION LiBRARy, BUftbfPJG. --lAS AGRICULTURAL EXPERIMENT STATION B. YOUNGBLOOD, DIRECTOR: . COLLEGE STATION. BRAZOS COUNTY. TEXAS ER, 1926 DIVISION OF CHEMISTRY COMMERCIAL FERTILIZER,S IN 1925-26 AND THEIR USES AGRICULTURAL... Engineering ?As of September 1, 1926. *On Leave **Dean ~chool of Veterinary Medicine. ***In cobperation with U. S. Departmen! of Agriculture. ****In cooperat~on w~th the School of Agriculture. SYNOPSIS This is the annual Fertilizer Control bulletin...

Fraps, G. S. (George Stronach); Asbury, S. E. (Samuel E.)



'\\'1' TI,l, lES '1'1 IF DFSERT O\\N \\ L\\Jpipe in the dirt many times ,md tl)und it exciting.'"  

E-Print Network [OSTI]

JF.NTIAL a pipe in the dirt many times ,md tl)und it exciting.'" and even foolish. Bill Schlesinger feels th~1t gn)wth wit.h 'I rock hammer and a metal pipe, She drives the pipe two inches into tlle gnl all d,e plant li the hlows ringing out in tllC silence. Then shpipe out and t


aunapuu lle pechter: Topics by E-print Network  

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

USerS groUp WorkShop LLE Review, Volume 124 205 The Second Omega, with significant NNSA support already allocated for studentpostdoctoral travel expenses. 12;The Second...


Page 1 of 4 Friday, August 1, 2014 Optional Pre-Conference Tours  

E-Print Network [OSTI]

stacked (Verti-Gro® and Hydro-StackerTM) systems and the nutrient flow technique (NFT) hydroponic system by bus to visit two livestock operations with focus on small farm beef production and small ruminant

Jawitz, James W.


Export is the default pathway for soluble unfolded polypeptides that accumulate during expression in Escherichia coli  

SciTech Connect (OSTI)

Several E. coli endogenous, cytoplasmic proteins that are known clients of the chaperonin GroEL were overexpressed to examine the fate of accumulated unfolded polypeptides. Substantial fractions of about half of the proteins formed insoluble aggregates, consistent with the hypothesis that these proteins were produced at rates or in amounts that exceeded the protein-folding capacity of GroEL. In addition, large fractions of three overexpressed GroEL client proteins were localized in an extra-cytoplasmic, osmotically-sensitive compartment, suggesting they had initially accumulated in the cytoplasm as soluble unfolded polypeptides and thus were able to access a protein export pathway. Consistent with this model, an intrinsically unfoldable, hydrophilic, non-secretory polypeptide was quantitatively exported from the E. coli cytoplasm into an osmotically-sensitive compartment. Our results support the conclusion that a soluble, unfolded conformation alone may be sufficient to direct non-secretory polypeptides into a protein export pathway for signal peptide-independent translocation across the inner membrane, and that export rather than degradation by cytoplasmic proteases is the preferred fate for newly-synthesized, soluble, unfolded polypeptides that accumulate in the cytoplasm. The stable folded conformation of exported GroEL client proteins further suggests that the requirement for GroEL may be conditional on protein folding in the molecularly-crowded environment of the cytoplasm.

Scotto-Lavino, E.; Freimuth, P.; Bai, M.; Zhang, Y.-B.



The characterization of bovine IgG1 allotypes using monoclonal antibodies in an Enzyme-linked Immunosorbant Assay  

E-Print Network [OSTI]

. , 1979) and immunoflouresence (Abdi et al. , 1980) have been u ed to study immunoglobulin allot ypes . The Enzyme ? Linked Immunosorbcnt Assay or ELISA (Fig 3) is a pre cedvre that has been used in our laboratory for this purpose (Estes ct al. , 1990... the same locus. They do not appear to correlate w'th resistance to B. abortus infection, but assay"- foz the presence of these allotypes cn Bruce lla ? pecif ic ant ibodies remain to be per formed in order to conf'rm this. REFERENCES Abdi H. B...

Schutta, Christopher John



A study of the influence of boron diffusion sources on the material and electrical characteristics of silicon p-n junctions  

E-Print Network [OSTI]

silicon wafers w'th 10-15 ohm-cm re- sistivity, 1$-17 mils thick, and a flat along (110). After initial c' eaning all wafers were subjected to 15 min. steam oxidation at 1100 C which yields approximately 3200 2 of oxide. The wsfers then went through... of the crystal can be deduced. The mask has been originally designed to allow an X-ray beam to scan across a 100x100 mil block of' diffused area 2 followed by a 100x100 mil block of undiffused area alterna- 2 tely. Due to the inevitable bowing of the wafer...

Huang, Kuan-Chun Andrew



An evaluation of sesame oil meal as a protein source for laying hens, broilers and turkeys  

E-Print Network [OSTI]

suggested that the second, limiting amino-acid in a corn-soybean oil meal ration for young chicks is glycine. Support for this theory was demonstrated by a significant response to 0. 2$ additional glycine to a corn-soybean diet supplemented w'th 0. 15...&xnts. The ether (upper) layex was then discarded. TZIs washing was repeated tsice mox'e. Then 5 ml? of the 50$ acetic s, cid, and, 50 ml, cthe were addedx shaken and t?&e upper layer again discarded ~ The flask contents were then ozzce more washed with 50...

Nott, Hugh



The effect of unidentified factor supplements and trace minerals on the reproductive performance of turkeys and chickens  

E-Print Network [OSTI]

of Unidentified Factor ". euces and Trace Minerals nn Egg Froonction 5 n ~ Hens During 20 Week Test ~ e o ~ ~ ~ ~ ~ ~ e ~ 3g Table 3 Effect of Unidentified Factor Bonrces ?nd Trace Minerals on Weight of Eggs Lau ~inc Hens ~ ~ ~ o ~ ~ ~ e ~ ~ ~ ~ e e ~ a 36... of foxnwxtation res14ua to the diet (group 4) vas 15. N carer th? basal group (Table 2), %hi the fexnantation residue vas fed in cmhLnation with condensed fiab solubles or Wth condensed fiab solubles and dried bracer's yeasty the hatchabilitg was increased...

Whiteside, Charles Hugh



A hypothesis concerning the distribution of salt and salt structures in the Gulf of Mexico  

E-Print Network [OSTI]

. oils an. l domes on abyssal plain anil in Bay ot' Cainp che as surveyei. '. by iA'orzel et al. (1968). Inse t is cioss-section A-A' bas d cn. seismic refracton me" sure- ments (Eiving et al. , 1960; Antoine and Ev:ing, 1963) 26 Known and inferred...) shows a re tricted oattern in the central and south!vest. rn parts of the G!!1! of !nf xico. Th= v'ell-defined caste" n and s out( em boundari. s o. th-. kr!oil-and-dome province apparently are associated, w"th th cutline of the Can peche Bank. Th...

Antoine, John Woodworth



Denton Wheat : A New Variety for North Texas.  

E-Print Network [OSTI]

'3 Feed Inspector W. E. FLINT, B. S., Agronomist W. D. NORTHCU~,'~~.', B. S., Feed Inspector PUBLICATIONS: SIDNEY D. REYNOLDS, JR., Feed Insprctor A. D. JACKSON. Chief P. A. MOORE, Feed Inspector SUBSTATIONS No. 1, Beeville, Bee County: No. 10... U. S. Department 'of Agriculture. ***In cooperation w~th the School of Agriculture. SYNOPSIS Denton wheat is a pure-line selection of Mediterranean wheat, developed by Texas Substation No. 6 at Denton, Texas. It represents the chief product of a...

Leidigh, A. H. (Arthur Henry); Mangelsdorf, Paul C. (Paul Christoph); Dunkle, P. B. (Paul Burtch)




E-Print Network [OSTI]

observed this clover growing along the road sides and spreading rapidly about Tyler, Tex. Medicago sativa (Alfalfa, Lucerne or Brazilian Clover). wth of about eighteen inches on plot. It makes a very leafy trong growth in many small volunteer patches...; it is a perennial, and grows here all the year round, furnishing excellent green feed for stock at all seasons, except that the green blades freeze in our very coldest weather. The grass has very strong roots and grows in the longest drouth almost...

Brunk, T. L.



Investigation of Sulfur Removal by Direct Limestone Injection  

E-Print Network [OSTI]

combustion process. The CaC03 decomposes (calcines) according to Equation (1) below and the resulting CaO captures H2S by the reaction given in Equation (2). ~he. calcination reaction is endotherm~c w~th an enthalpy of reaction for calcination of 42... of CaO with H 2 S to simulate reducing conditions such as encountered in the first stage of a two-staged combustion process. Reactions of CaO with s02 will be considered at a future date. ANALYSIS General Considerations The analysis is conducted...

Colaluca, M. A.; Maloney, D. J.


The Black Legend and United States' attitudes in Cuba, 1898-1902  

E-Print Network [OSTI]

. w!nism in America. The biases embodied i:! thc Bi a& k Legend, combined !'ith a gro!&ing sense oi national i tl and imper i al& sm, plavcd;& n&aj or ro! c in the written and verbal reports about Cuba and the Cu- bans. However, historical... at opinions in thc Uni 1. eil States. The United States almost from its inception as a sov- ereign nation had an interest in the island of Cuba. Long after the other Latin American countries had gained inde- pendence, Cuba remained in ?hat was termed...

Byrd, Judy Lynn



Alan Turing 100 -eine Geburtstagsfeier fr einen groen Mathematiker, Informatiker  

E-Print Network [OSTI]

Alan Turing 100 - eine Geburtstagsfeier für einen gro�en Mathematiker, Informatiker und Kryptologen und Werk von Alan Turing --- Prof. Dr. Michael Fothe Alan Turings Arbeiten von 1936 - eine Geburtsstunde der theoretischen Informatik --- Prof. Dr. Martin Mundhenk Alan Turing als Kryptologe im 2

Seyfarth, Andre


Exploiting heavy oil reserves  

E-Print Network [OSTI]

North Sea investment potential Exploiting heavy oil reserves Beneath the waves in 3D Aberdeen.hamptonassociates.com pRINTED BY nB GroUP Paper sourced from sustainable forests CONTENTS 3/5 does the north Sea still industry partnership drives research into sensor systems 11 Beneath the waves in 3d 12/13 does

Levi, Ran


PROCEEDINGS, Thirty-Sixth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, January 31 -February 2, 2011  

E-Print Network [OSTI]

compared to other similar hydraulic fracturing in crystalline rock. Towards the end of the treatment three Telegrafenberg Potsdam, D-14473, Germany urpi@gfz-potsdam.de ABSTRACT A cyclic hydraulic fracturing experiment in the 5 day water-frac stimulation treatment that took place in the test site of Gro� Schönebeck, Germany

Stanford University

Note: This page contains sample records for the topic "djusted gro wth" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


2. Klausur Kontinuumsmechanik -WS11/12, Prof. Dr. rer. nat. V. Popov Losungshinweise Seite 1 (a) p(y) = W gy (1)  

E-Print Network [OSTI]

W gbR2 (8) N = Fy + G = 1 + 2 W gbR2 (9) Der Grenzfall tritt ein, wenn beide Seiten gleich groÃ? - sinh l cosh l (37) Resonanz tritt auf wenn cos l = 0, z.B. l = 2 R = EI A 2l 2 (38) Aufgabe 4 (a) QD

Berlin,Technische Universität


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

E-Print Network [OSTI]

, 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...

Konow, Elise Ann



he College of Architecture and Design and the School of Art + Design are meeting the growing  

E-Print Network [OSTI]

nonprofit group. The PREtty Fab house in Jersey City (left top row), designed by Assistant Professor Richard Goldman. The PREtty Fab house in Jersey City, designed by Assistant Professor Richard Garber, Nicole-on roles in designing the of the house at GRO. The geometry of the economical 1,600 square foot residence

Bieber, Michael


Premire tape vers une navigation rfrentielle par l'image pour l'assistance  

E-Print Network [OSTI]

daylight ambience design. Within this paper, we present, in a first part, the semantic indexation method solutions conçues [GRO 02]. Ils utilisent des paramètres d'évaluation qui supposent un état avancé de la question [LAS 98] (Projet « Audience »1 ) (Projet « Daylight Design Variations Book »2 ). La valeur de

Paris-Sud XI, Université de


Ein Zylinder mit dem Radius R rollt ab auf zwei nicht dehnbaren Fden. Zu einem Zeitpunkt ist die Winkelgeschwindigkeit des Zylinders gleich  

E-Print Network [OSTI]

Aufgabe 1: Ein Zylinder mit dem Radius R rollt ab auf zwei nicht dehnbaren Fäden. Zu einem . Wie gro� ist die Geschwin- digkeit des Zentrums des Zylinders? Aufgabe 2. Ein Rad mit dem Radius 0r rollt auf einer Kreisbahn vom Radius 02l r= . Man bestimme die Lage der momentanen Rotationsachse und

Berlin,Technische Universität


BUPMC -UPD Nouvelles acquisitions  

E-Print Network [OSTI]

MATHÃ?MATIQUES 02.5 AND 13 A The selected works of George E. Andrews : with commentary / George E Andrews, editors Sophie Germain 30 GRO 13 The Gross-Zagier formula on Shimura curves / Xinyi Yuan, Shou-wu Zhang

Hélein, Frédéric - Institut de Mathématiques de Jussieu, Université Paris 7


Isogeometric Simulation of Turbine Blades for Aircraft Engines David Gromann1  

E-Print Network [OSTI]

Isogeometric Simulation of Turbine Blades for Aircraft Engines David Gro�mann1 , Bert Jüttler2, in the challenging field of aircraft engines. We study the deformation of turbine blades under the assumption, manufacturing and repairing turbine engines for aircrafts. A challenging task in this field is the efficient

Jüttler, Bert


Modellierung stochastischer Datenprozesse f ur Opti-mierungsmodelle der Energiewirtschaft  

E-Print Network [OSTI]

Modellierung stochastischer Datenprozesse f ur Opti- mierungsmodelle der Energiewirtschaft #3; Dr Kraftwerkssystems eingesetzt. 1 Einleitung Durch die Liberalisierung der Stromwirtschaft wurden Modelle f ur die \\Echtzeit-Optimierung gro#25;er Sys- teme" der Deutschen Forschungsgemeinschaft und des BMBF-Programms \\Neue

Römisch, Werner


Enumerative and Algebraic Aspects of Slope Varieties  

E-Print Network [OSTI]

.4 Grassmannians and algebraic geometry . . . . . . . . . . . . . . . . . 10 2.4.1 Grassmannians . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.4.2 Schubert cells . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.5 Graph varieties... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.5.1 Picture space . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.5.2 Defining ideal for the slope variety . . . . . . . . . . . . . . . . 18 2.5.3 Gro¨bner bases . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 3 Slope...

Enkosky, Thomas



Summer 1986 Water Quality Leads List of Concerns at Water Workshop  

E-Print Network [OSTI]

will then research solutions or ways to minimize the impact of the most pressing problems. Forty-six participants resources districts. counties-including extension agents-the legislature. enviro nmental groups. farm groups of contaminants into gro undwater. - Data is inadequate regarding the criteria, standards and impacts of many

Nebraska-Lincoln, University of


Analyses of Commercial Fertilizers Sold during 1954-55.  

E-Print Network [OSTI]

Acres Texas Liquid Texas Longhorn Texaphos Tex-Hi Thorobred Tide Green Top Crop Top-0-Texas Top of the World Topper Umbaugh Uramite Uran v-C v-0 Versene Versen-01 Vertagreen Victory Vi goro Vito-Gro Vi t rea Walker's Water Feed...

Fudge, J. F.



Analyses of Commercial Fertilizers Sold during 1955-56.  

E-Print Network [OSTI]

Longhorn Texaphos Tex-Hi Thorobred Tide Green Top Crop Top-0-Texas Top of the World Topper Tren Umbaugh Uramite Viking Ship v-C v-0 Versene Versen-01 Vertagreen Victory Vi goro Vito-Gro Vi trea W a1 ker's Water Feed Weber-King Wesco...

Fudge, J. F.



Die MAN Diesel & Turbo sucht am Standort Augsburg fr den Bereich Strategie/Unternehmensentwicklung zum frhestmglichen Eintrittstermin eine/n  

E-Print Network [OSTI]

Die MAN Diesel & Turbo sucht am Standort Augsburg für den Bereich Strategie Projekte. Als Stabsfunktion berichtet die Abteilung direkt an den Vorstand von MAN Diesel & Turbo SE. Wir Diesel & Turbo ist weltweit führender Anbieter von Gro�dieselmotoren und Turbomaschinen für maritime und

Stein, Oliver


Long-term ice sheetclimate interactions under anthropogenic greenhouse forcing simulated with a complex Earth System Model  

E-Print Network [OSTI]

with a complex Earth System Model Miren Vizcai´no � Uwe Mikolajewicz � Matthias Gro¨ger � Ernst Maier-Reimer �-millennia simulations have been performed with a complex Earth System Model (ESM) for different anthropogenic climate climate change Á Meridional overturning circulation Á Earth system modelling Á Sea level 1 Introduction

Winguth, Arne


Operational Arome New Arome version in test Radar observation Report 2009  

E-Print Network [OSTI]

, a new version of our Earth-System model has been prepared to guarantee our contributions to the upcoming 5th IPCC report. Consultations with IPSL have started to share a larger part of the Earth System modelling infrastructure. Re- search has largely contributed to the gro- wing offer of Météo

Ribes, Aurélien


Water Resources Research Center Annual Technical Report  

E-Print Network [OSTI]

Water Resources Research Center Annual Technical Report FY 1999 Introduction PROGRAM REPORT FLORIDA WATER RESOURCES RESEARCH CENTER FEDERAL GRANT NO. 1434-HQ-96-GRO2663 PERIOD: March 1, 1999 - February 29, 2000 The Water Resources Research Center (WRRC) was re-established as a separate entity from


Technology Access Deutsches Patent; Internationale Patentanmeldung (PCT)  

E-Print Network [OSTI]

Technology Access offered by Deutsches Patent; Internationale Patentanmeldung (PCT) TM 586 besitzt einen so gro�en Einfluss auf eine Vielzahl zellulä- in zahlreichen Signalwegen #12; Deutsches Störungen, Depression, Schizophrenie sowie Haarausfall und verringerte Spermienmotilität. #12; Deutsches

Haller-Dintelmann, Robert


JOURNAL DE PHYSIQUE Colloque C6, supplment au n6, Tome h5, juin 198<) page C6-103  

E-Print Network [OSTI]

of a gro- wing interest. Two are the main reasons for its study. Firstly, high energy heavy ion reactions) of matter at densities around nuclear matter saturation density and temperatures (T) up to 10- 20 MeV /2 are obtained by minimising the Free energy of the content of a sphe rical cell of radius Re, imposing charge

Boyer, Edmond


Historical Roots, Spiritual Significance and the Health Benefits of mKhempa-lJong gNyes Tshachu (hot spring) in Lhuntshe  

E-Print Network [OSTI]

cures skin diseases including scabies and heals bone fractures and chronic wounds. mKha'- 'gro'i tsahchu 2,925 40.3 Limestone and sulphur Helpful in treating chu- ser-dreg-nad, gout, rheumatoid arthritis, polio and paralysis. It cures skin...

Wangchuk, Phurpa; Dorji, Yeshi



Evaluation of the Dairy/Yeast Prebiotic, Grobiotic-A, in the Diet of Juvenile Nile Tilapia, Oreochromis niloticus  

E-Print Network [OSTI]

Two different feeding trials were conducted to evaluate the effects of dietary supplementation with the dairy/yeast prebiotic GroBiotic-A (GBA) to Nile tilapia diets. A nutritionally complete basal diet was supplemented with GBA at either 1 or 2...

Peredo, Anjelica


Note: This page contains sample records for the topic "djusted gro wth" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


Shelling Percentage in Grain Sorghum.  

E-Print Network [OSTI]

. REINHARD, B. S., Entomolo~ist L. R. \\\\'atson, A. M., Apiculturist C. S. RUDE, B. S , EntornoIo~isf A. H. ALEX, B. S., Queen Breeder \\V P. TRICE. B. S., Assrstant Entomologist AGRONOMY A. B. CONNER R. S Chief- Crops . A. H. ~Ernrc,; B. s:: ~gro...

Conner, A. B. (Arthur Benjamin)



What is a Recession? In early December, the government  

E-Print Network [OSTI]

What is a Recession? In early December, the government announced that we've been in a reces- sion like the utility bills, clothing, and gro- ceries, are some of the easiest to cut back. Call your phone depends on your own situation, but it is recommended to save at least 6-9 months worth of your salary

Oliver, Douglas L.


Regmi Research Series ,Year 17, 1985  

E-Print Network [OSTI]

?nr! Those Blchar1S cannot send any man to j a il or put him jn irons. They may ooly detain h:lm in coo rt pEflding the d ec ision of his case. If it be necessary to put him in iroos or send him to j.a~, . ltmust be dooe w!th. the Dittha's sanction. 36... and ch ildren. 5. (»nfiscatioo B .H. H~ 2.The Dhoong a Olooayi or touching of a stcne is this - ,·,'hen a case is dec1d.ed, the Bichar! orders a stone (any stone) t o be brought and upoo it a few blades of I);:)ob grass to be put. Boa tin(1 canmands...

Regmi, Mahesh C



Design of a 25-kWe Surface Reactor System Based on SNAP Reactor Technologies  

SciTech Connect (OSTI)

A Hastelloy-X clad, sodium-potassium (NaK-78) cooled, moderated spectrum reactor using uranium zirconium hydride (UZrH) fuel based on the SNAP program reactors is a promising design for use in surface power systems. This paper presents a 98 kWth reactor for a power system the uses multiple Stirling engines to produce 25 kWe-net for 5 years. The design utilizes a pin type geometry containing UZrHx fuel clad with Hastelloy-X and NaK-78 flowing around the pins as coolant. A compelling feature of this design is its use of 49.9% enriched U, allowing it to be classified as a category III-D attractiveness and reducing facility costs relative to highly-enriched space reactor concepts. Presented below are both the design and an analysis of this reactor's criticality under various safety and operations scenarios.

Dixon, David D. [Nuclear Systems Design Group, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Department of Nuclear Engineering, North Carolina State University, Raleigh, NC 27695 (United States); Hiatt, Matthew T. [Nuclear Systems Design Group, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Department of Nuclear Engineering, Texas A and M University, College Station, TX 77843 (United States); Poston, David I.; Kapernick, Richard J. [Nuclear Systems Design Group, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)



Draft regulatory analysis: notice of proposed rulemaking motor gasoline allocation revisions  

SciTech Connect (OSTI)

The Draft Regulatory Analysis is prepared for those proposed regulations which either may have a major impact on the general economy, individual industries, or geographic regions and levels of government, or may be significant in that they affect important DOE policy concerns and are the object of public interest. The problems and proposed solutions for the Notice of Proposed Rulemaking and Public Hearings on the Motor Gasoline Allocation Program are examined. The ERA's mandate for this program is set out in the Emergency Petroleum Allocation Act of 1973. Under this Act, the President is empowered to enforce, at his discretion, price and allocation controls on petroleum and petroleum products, including gasoline, through September 30, 1981. The Act sets the following allocation goals: protect public health; maintain public services and agricultural operations; foster competition in the petroleum industry; distribute petroleum among industry sectors and US regions equitably; and minimize economic disruption and unnecessary interference wth market mechanisms.




Galactic Superluminal Sources  

E-Print Network [OSTI]

A new class of X-ray sources was clearly established with the discovery of highly relativistic radio jets from the galactic sources GRS 1915+105 and GRO J1655-40. Both of these objects have given us a broader view of black holes and the formation of jets, yet they also show the complexity of the accretion environment near relativistic objects. The fast apparent motion of the jets, their luminosity and variability, their high energy spectrum, and approximate scaling to the behavior of active galactic nuclei, certainly warrant the description "microquasar". I present a review of the observational data on these sources, and discuss where we stand on a physical picture of GRS 1915+105 and GRO J1655-40 as taken from multi-wavelength studies. I also point out other galactic sources which share some of the properties of the microquasars, and what to look for as a high energy "signature" in future observations.

B. A. Harmon



The high energy emission from black holes  

E-Print Network [OSTI]

The origin of the high energy emission (X-rays and gamma-rays) from black holes is still a matter of debate. We present new evidence that hard X-ray emission in the low/hard state may not be dominated by thermal Comptonization. We present an alternative scenario for the origin of the high energy emission that is well suited to explain the high energy emission from GRO J1655-40.

M. D. Caballero-Garcia; J. M. Miller; E. Kuulkers



Vascular Plant Survey of the Canyonlands Unit of the Big Thicket National Preserve, Tyler County, Texas  

E-Print Network [OSTI]

list with scientific name, authority and all compared entities for each plant species can be found in Appendix E. T A B LE 2. Definitio n of co des use d to indic ate o rigi n, longevity, and seaso n of gro w... for all the plants collected can be found in Appendix A. Checklist of the Vascular Plants of the Canyonlands Unit of the Big Thicket National Preserve Pteridophyta ASPLENIACEAE Asplenium platyneuron (L.) B.S.P N P W BLECHNACEAE...

Haile, Kelly



CS 2011, 15 17 June 2011, T-Labs Berlin Germany Innovative Internet  

E-Print Network [OSTI]

11th I2 CS 2011, 15 ­ 17 June 2011, T-Labs Berlin Germany Innovative Internet Community Systems I2, 15 ­ 17 June 2011, T-Labs Berlin Germany Pre-Conference Events Tuesday: Informal Welcome Reception Wednesday morning: Gro�er Tiergarten Jogging #12;11th I2 CS 2011, 15 ­ 17 June 2011, T-Labs Berlin Germany

Rossak, Wilhelm R.


Relativity at Action or Gamma-Ray Bursts  

E-Print Network [OSTI]

Gamma ray Bursts (GRBs) - short bursts of few hundred keV $\\gamma$-rays - have fascinated astronomers since their accidental discovery in the sixties. GRBs were ignored by most relativists who did not expect that they are associated with any relativistic phenomenon. The recent observations of the BATSE detector on the Compton GRO satellite have revolutionized our ideas on these bursts and the picture that emerges shows that GRBs are the most relativistic objects discovered so far.

Tsvi Piran



Max-Planck-Institute for the Physics of Complex Systems, Dresden, Germany MPI-PKS Institute Retreat  

E-Print Network [OSTI]

Flach Localizing Energy Through Nonlinearity and Discreteness Dining Hall 12:15 - 13:00 © Lunch 13 arrive in Gro� D¨olln 12:30 - 13:15 Check-In Hotel D¨ollnsee-Schorfheide Dining Hall 13:15 - 14:15 Lunch 16:30 - 17:20 Ilya Eremin Routes to Unconventional Superconductivity Dining Hall 18:30 - 19:30 Dinner

Jülicher, Frank


Do X-ray Binary Spectral State Transition Luminosities Vary?  

E-Print Network [OSTI]

We tabulate the luminosities of the soft-to-hard state transitions of all X-ray binaries for which there exist good X-ray flux measurements at the time of the transition, good distance estimates, and good mass estimates for the compact star. We show that the state transition luminosities are at about 1-4% of the Eddington rate, markedly smaller than those typically quoted in the literature, with a mean value of 2%. Only the black hole candidate GRO J~1655-40 and the neutron star systems Aql X-1 and 4U 1728-34 have measured state transition luminosities inconsistent with this value at the 1$\\sigma$ level. GRO J~1655-40, in particular, shows a state transition luminosity below the mean value for the other sources at the $4\\sigma$ level. This result, combined with the known inner disk inclination angle (the disk is nearly parallel to the line of sight) from GRO J~1655-40's relativistic jets suggest that the hard X-ray emitting region in GRO J~1655-40 can have a velocity of no more than about $\\beta=0.68$, with a most likely value of about $\\beta=0.52$, and a minimum speed of $\\beta=0.45$, assuming that the variations in state transition luminosities are solely due to relativistic beaming effects. The variance in the state transition luminosities suggests an emission region with a velocity of $\\sim0.2c$. The results are discussed in terms of different emission models for the low/hard state. We also discuss the implications for measuring the dimensionless viscosity parameter $\\alpha$. We also find that if its state transitions occur at typical luminosities, then GX 339-4 is likely to be at a distance of at least 7.6 kpc, much further than typically quoted estimates.

Thomas J. Maccarone



Observation of solar high energy gamma and X-ray emission and solar energetic particles  

E-Print Network [OSTI]

We considered 18 solar flares observed between June 2010 and July 2012, in which high energy >100 MeV {\\gamma}-emission was registered by the Large Area Telescope (LAT) aboard FermiGRO. We examined for these {\\gamma}-events soft X-ray observations by GOES, hard X-ray observations by the Anti-Coincidence Shield of the SPectrometer aboard INTEGRAL (ACS SPI) and the Gamma-Ray burst Monitor (GBM) aboard FermiGRO. Hard X-ray and {\\pi}0-decay {\\gamma}-ray emissions are used as tracers of electron and proton acceleration, respectively. Bursts of hard X-ray were observed by ACS SPI during impulsive phase of 13 events. Bursts of hard X-ray >100 keV were not found during time intervals, when prolonged hard {\\gamma}-emission was registered by LAT/FermiGRO. Those events showing prolonged high-energy gamma-ray emission not accompanied by >100 keV hard X-ray emission are interpreted as an indication of either different acceleration processes for protons and electrons or as the presence of a proton population accelerated du...

Struminsky, Alexei



Contribution aux nombrables de la tradition Bon po : l'Appendive de bsTan 'dzin Rin chen rgyal mtshan a la Sphere de Cristal des Dieux et des Demons de Shar rdza rin po che  

E-Print Network [OSTI]

gsum rnam par 'byed palha gnyen shel sgong zhes bya ba). Inclus en ouverture du volume 14 [Pha] de lacollection, ce texte expose les principes fondamentaux, théoriques et prati-ques, qui animent les deux Phases (rim gnyis) de la pratique tantrique supé... strictementconforme à ce qu'elle devrait être. Selon bsTan 'dzin Rin chen rgyal mtshanles préliminaires formant ce que l’on désigne comme l’entraînement destrois portes (sngon ‘gro sgo gsum sbyang ba)48 comprennent les éléments sui-vants : — pour le corps (lus), il...

Achard, Jean-Luc



Structure and seismic stratigraphy of the Vermilion, South Marsh Island, and South Marsh Island North Addition OCS Areas, Gulf of Mexico  

E-Print Network [OSTI]

!ous spines. The vertical growth and isolation of the domes& on the shelf' and in the study area, is controlled b bouyancy and differentia loading of the salt we&igc (Lehner, 1969). Shale structures, although less common than sa!t domes, are another feature... major time-stratigraphic uuits (]v]?Far]an and LeHoy) 1988). Salt domes on the inner shelf' reached maximum gro&vt? durir)g ihe V]io-f leis!. ocene as deltaic clastics prograded a pre-existing salt plat?a? (Spindler, 1977). ss 1 TEXAS I 1 ( L...

Chesnut, John Kent



Urinary kynurenic and xanthurenic acids of the dog before and after the injection of a convulsive dose of 1,1-dimethylhydrazine  

E-Print Network [OSTI]

'ferent structures. Disloc=tion theory is not directly a plicable bec use it does not explcin why most of the whis!. ers h. ;ve in- cre'. sin- cross a=etio=el -recs fromi b se to ti . Dis- loc"tion theory predicts that t' e cross sectional area of a wh1sl:er s... History of 11hislcers Di sloe, "-, ti on Theory. Importance of ManGanous Oxide 'Ahisl-ers. . . . 11 I I . GRO". lTR ApJ3 . rstus, ExDerimcntsi F "occdure Results, Groirth Mechanism. III. OPTICAL 1 1CRCSCOIE STDDI:S Cl=-s. . ific"-tion ;. nd...

Dixon, Dock Franklin



Turfgrass: Field to provide lab to research new technologies  

E-Print Network [OSTI]

lab to research new technologies 14 tx H2O Summer 2011 Turfgrass Continued (Left) Dr. Mark Hussey, vice chancellor and dean for agriculture and life sciences at Texas A&M University, and Jim Tates, Scotts Company southwest region president..., are joined by others showing a recognition plaque given to the Scotts Company. Photo courtesy of Texas A&M AgriLife. (Right) Dr. David Baltensperger and Dr. Richard White stand in front of the future Scotts Miracle-Gro Lawn and Garden Research...

Wythe, Kathy



A preliminary systems design study of plastic sabots for small arms  

E-Print Network [OSTI]

Gun Enthusiasts Page 12 Market Dimensions, Market Pererration, and Sales Income for the First Five Years Beginning in 1972 14 Pro Forma for the First Five Years 23 Forces Acting on the Bullet and the Sabot Which Cause Change in 27 Selected...: Dr. Charles A. Rodenberger This st udy is the presentation of a systems engineering approa . ~he development of a new business developing $5, 600, 000 annual gro s sales witnu. '' " vears based on the invention of plastic sabots for small arms. A...

Whitt, Daniel Truett



Photoperiodism, and related ecology, in Thalassia testudinum  

E-Print Network [OSTI]

in this configuration, the inner two cool-white lamps of each array were replaced with gro-lux lamps of the same wattage, At the same time each array was supplemented with a clear 150 watt incan- descent lamp, This incandescent lamp was introduced into the center..., The distinction is that the former only flowers under photoperiods of that length or longer, whereas the latter only flowers under photoperiods of that length or shorter. More recently it has been shown that the response types are not always as simple...

Marmelstein, Allan David



The Edinburgh Addiction Cohort: recruitment and follow-up of a primary care based sample of injection drug users and non drug-injecting controls  

E-Print Network [OSTI]

of birth) to allow matching. Only exact matches on these fields were accepted. For SMR, Prison and Police data a single matched file of information up to the date of matching was provided to the study team. For death certificates information is provided... and 19 dead cases. Searches for the full number of cohort members could not be carried out due to lack of police resources. 4. General Register Office (GRO) for Scotland pro- vided the study with tracing data and death certificates. In each case...

Macleod, John; Copeland, Lorraine; Hickman, Matthew; McKenzie, James; Kimber, Jo; De Angelis, Daniela; Robertson, James R


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Technology acquisition: sourcing technology from industry partners  

E-Print Network [OSTI]

gaps - Pra ctice- based Framew ork (v1.0). - 13 S emi- structu red intervie ws / Ground ed anal ysis CHAPTER  1 9 Cha pterP urpose of the chapte r Main a rgume nts/fin dings Frame work version Data s ources / Analyt ical me thod... ses sion where the ref ined fr amewo rk (v3. 0) was presen ted to a fo rum of practi tioners . - The c omme nts and feedb ack pr ovided by par ticipan ts supp orted t he results of the resear ch. - - - Foc us gro up. - Par ticipan ts...

Ortiz-Gallardo, Victor Gerardo



The preliminary design of thermoelectric generation system using the fluid heat sources  

SciTech Connect (OSTI)

This paper describes the preliminary design of a thermoelectric generation system using the fluid heat sources available as the waste heat of the phosphoric acid fuel cells. The thermoelectric generator consists of many thermoelectric generation units. For estimating the output performance of the thermoelectric generator, an equilibrium thermal circuit was derived from an analytic model of a thermoelectric generation unit. Based on the equivalent thermal circuit, the output performance at thermal equilibrium was calculated by iteration. In this paper, the output performance was estimated considering the cold side pumping power. The calculation was done by assuming a heat source temperature of about 450K on the hot side, about 310 K on the cold side, and 2,000kWth as heat exchange capacity. The electric power of the generator with a size of 1.5 x 1.5 x 1.4 (h) m{sup 3} was found to be about 70 kW and its power density, about 1.5 kW/m{sup 2} excepting the pumping power on the cold water side.

Hori, Y.; Ito, T. [Central Research Inst. of Electric Power Industry, Yokosuka, Kanagawa (Japan)



Final Technical Report  

SciTech Connect (OSTI)

This report summarizes the successful results of our SunShot project, Advanced Low-Cost Receivers for Parabolic Troughs. With a limited budget of $252K and in only 12 months, we have (1) developed validated optical and thermal models and completed rigorous optimization analysis to identify key performance characteristics as part of developing first-generation laboratory prototype designs, (2) built optical and thermal laboratory prototypes and test systems with associated innovative testing protocols, and (3) performed extensive statistically relevant testing. We have produced fully functioning optical and thermal prototypes and accurate, validated models shown to capture important underlying physical mechanisms. The test results from the first-generation prototype establish performance exceeding the FOA requirement of thermal efficiency >90% for a CSP receiver while delivering an exit fluid temperature of > 650 °C and a cost < $150/kWth. Our vacuum-free SunTrap receiver design provides improvements over conventional vacuum-tube collectors, allowing dramatic reductions in thermal losses at high operating temperature.

Stettenheim, Joel [Norwich Technologies] [Norwich Technologies; McBride, Troy O. [Norwich Technologies] [Norwich Technologies; Brambles, Oliver J. [Norwich Technologies] [Norwich Technologies; Cashin, Emil A. [Norwich Technologies] [Norwich Technologies



UFO (UnFold Operator) default data format  

SciTech Connect (OSTI)

The default format for the storage of x,y data for use with the UFO code is described. The format assumes that the data stored in a file is a matrix of values; two columns of this matrix are selected to define a function of the form y = f(x). This format is specifically designed to allow for easy importation of data obtained from other sources, or easy entry of data using a text editor, with a minimum of reformatting. This format is flexible and extensible through the use of inline directives stored in the optional header of the file. A special extension of the format implements encoded data which significantly reduces the storage required as compared wth the unencoded form. UFO supports several extensions to the file specification that implement execute-time operations, such as, transformation of the x and/or y values, selection of specific columns of the matrix for association with the x and y values, input of data directly from other formats (e.g., DAMP and PFF), and a simple type of library-structured file format. Several examples of the use of the format are given.

Kissel, L.; Biggs, F. (Sandia National Labs., Albuquerque, NM (USA)); Marking, T.R. (Applied Physics, Inc., Albuquerque, NM (USA))



Helicobacter pylori-derived Heat shock protein 60 enhances angiogenesis via a CXCR2-mediated signaling pathway  

SciTech Connect (OSTI)

Helicobacter pylori is a potent carcinogen associated with gastric cancer malignancy. Recently, H. pylori Heat shock protein 60 (HpHSP60) has been reported to promote cancer development by inducing chronic inflammation and promoting tumor cell migration. This study demonstrates a role for HpHSP60 in angiogenesis, a necessary precursor to tumor growth. We showed that HpHSP60 enhanced cell migration and tube formation, but not cell proliferation, in human umbilical vein endothelial cells (HUVECs). HpHSP60 also indirectly promoted HUVEC proliferation when HUVECs were co-cultured with supernatants collected from HpHSP60-treated AGS or THP-1 cells. The angiogenic array showed that HpHSP60 dramatically induced THP-1 cells and HUVECs to produce the chemotactic factors IL-8 and GRO. Inhibition of CXCR2, the receptor for IL-8 and GRO, or downstream PLC{beta}2/Ca2+-mediated signaling, significantly abolished HpHSP60-induced tube formation. In contrast, suppression of MAP K or PI3 K signaling did not affect HpHSP60-mediated tubulogenesis. These data suggest that HpHSP60 enhances angiogenesis via CXCR2/PLC{beta}2/Ca2+ signal transduction in endothelial cells.

Lin, Chen-Si [Department of Biological Science and Technology, National Chiao-Tung University, Hsin-Chu, Taiwan (China) [Department of Biological Science and Technology, National Chiao-Tung University, Hsin-Chu, Taiwan (China); School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan (China); He, Pei-Juin; Hsu, Wei-Tung [Department of Biological Science and Technology, National Chiao-Tung University, Hsin-Chu, Taiwan (China)] [Department of Biological Science and Technology, National Chiao-Tung University, Hsin-Chu, Taiwan (China); Wu, Ming-Shiang [Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan (China)] [Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan (China); Wu, Chang-Jer [Department of Food Science, National Taiwan Ocean University, Keelung, Taiwan (China)] [Department of Food Science, National Taiwan Ocean University, Keelung, Taiwan (China); Shen, Hsiao-Wei [Institute of Molecular Medicine and Bioengineering, National Chiao-Tung University, Hsin-Chu, Taiwan (China)] [Institute of Molecular Medicine and Bioengineering, National Chiao-Tung University, Hsin-Chu, Taiwan (China); Hwang, Chia-Hsiang [Yung-Shin Pharmaceutical Industry Co., Ltd., Tachia, Taichung, Taiwan (China)] [Yung-Shin Pharmaceutical Industry Co., Ltd., Tachia, Taichung, Taiwan (China); Lai, Yiu-Kay [Department of Life Science, Institute of Biotechnology, National Tsing Hua University, Hsin-Chu, Taiwan (China)] [Department of Life Science, Institute of Biotechnology, National Tsing Hua University, Hsin-Chu, Taiwan (China); Tsai, Nu-Man [School of Medical Laboratory and Biotechnology, Chung Shan Medical University, Taichung, Taiwan (China)] [School of Medical Laboratory and Biotechnology, Chung Shan Medical University, Taichung, Taiwan (China); Liao, Kuang-Wen, E-mail: kitchhen@yahoo.com.tw [Institute of Molecular Medicine and Bioengineering, National Chiao-Tung University, Hsin-Chu, Taiwan (China)] [Institute of Molecular Medicine and Bioengineering, National Chiao-Tung University, Hsin-Chu, Taiwan (China)



Survival probability and energy modification of hydrogen Energetic Neutral Atoms on their way from the termination shock to Earth orbit  

E-Print Network [OSTI]

Context: With the forthcoming launch of a NASA SMEX mission IBEX devoted to imaging of heliospheric interface by in-situ detection of Energetic Neutral Atoms (ENA) an important issue becomes recognizing of transport of these atoms from the termination shock of the solar wind to Earth orbit. Aims: Investigate modifications of energy and of survival probability of the H ENA detectable by IBEX (0.01 -- 6 keV) between the termination shock and Earth orbit taking into account the influence of the variable and anisotropic solar wind and solar EUV radiation. Methods: Energy change of the atoms is calculated by numerical simulations of orbits of the H ENA atoms from ~100 AU from the Sun down to Earth orbit, taking into account solar gravity and Lyman-$\\alpha$ radiation pressure, which is variable in time and depends on radial velocity of the atom. To calculate survival probabilities of the atoms against onization, a detailed 3D and time-dependent model of H ENA ionization based on observations of the solar wind and EUV ionizing radiation is constructed, and wth the use of this model probabilities of survival of the atoms are calculated by numerical integration along the previously calculated orbits. Results: Owing to the radiation pressure, H ENA reach the Earth orbit practically without energy and direction change except the atoms with energy lower than 0.1 keV during high solar activity. For a given energy at Earth orbit one expects fluctuations of survival probability from ~20% at 0.01 keV down to just a few percent at 6 keV and a modulation of survival probability as a function of the location at Earth orbit, ecliptic latitude of the arrival direction, and the phase of solar cycle with an amplitude of a few dozen percent for 0.1 keV atoms at solar minimum to a few percent for 6 keV atoms at solar maximum.

M. Bzowski



Operational Results of a Closed Brayton Cycle Test-Loop  

SciTech Connect (OSTI)

A number of space and terrestrial power system designs plan to use nuclear reactors that are coupled to Closed-loop Brayton Cycle (CBC) systems to generate electrical power. Because very little experience exists regarding the operational behavior of these systems, Sandia National Laboratories (through its Laboratory Directed Research and Development program) is developing a closed-loop test bed that can be used to determine the operational behavior of these systems and to validate models for these systems. Sandia has contracted Barber-Nichols Corporation to design, fabricate, and assemble a Closed-loop Brayton Cycle (CBC) system. This system was developed by modifying commercially available hardware. It uses a 30 kWe Capstone C-30 gas-turbine unit (www.capstoneturbine.com) with a modified housing that permits the attachment of an electrical heater and a water cooled chiller that are connected to the turbo-machinery in a closed loop. The test-loop reuses the Capstone turbine, compressor, and alternator. The Capstone system's nominal operating point is 1150 K turbine inlet temperature at 96,000 rpm. The annular recuperator and portions of the Capstone control system (inverter) and starter system are also reused. The rotational speed of the turbo-machinery is controlled either by adjusting the alternator load by either using the electrical grid or a separate load bank. This report describes the test-loop hardware SBL-30 (Sandia Brayton Loop-30kWe). Also presented are results of early testing and modeling of the unit. The SBL-30 hardware is currently configured with a heater that is limited to 80 kWth with a maximum outlet temperature of {approx}1000 K.

Wright, Steven A.; Lipinski, Ronald J.; Brown, Nicholas [Sandia National Laboratories, Org 6872 MS-1146, PO Box 5800 Albuquerque, New Mexico 87185 (United States); Fuller, Robert; Nichols, Kenneth [Barber Nichols 6325 W 55th Ave., Arvada, Colorado 80002 (United States)



Opto-thermal analysis of a lightweighted mirror for solar telescope  

E-Print Network [OSTI]

In this paper, an opto-thermal analysis of a moderately heated lightweighted solar telescope mirror is carried out using 3D finite element analysis (FEA). A physically realistic heat transfer model is developed to account for the radiative heating and energy exchange of the mirror with surroundings. The numerical simulations show the non-uniform temperature distribution and associated thermo-elastic distortions of the mirror blank clearly mimicking the underlying discrete geometry of the lightweighted substrate. The computed mechanical deformation data is analyzed with surface polynomials and the optical quality of the mirror is evaluated with the help of a ray-tracing software. The thermal print-through distortions are further shown to contribute to optical figure changes and mid-spatial frequency errors of the mirror surface. A comparative study presented for three commonly used substrate materials, namely, Zerodur, Pyrex and Silicon Carbide (SiC) is relevant to vast area of large optics requirements in gro...

Banyal, Ravinder K; Chatterjee, S



Interim Results from Alternative Fuel Truck Evaluation Project  

SciTech Connect (OSTI)

The objective of this project, which is supported by the U.S. Department of Energy (DOE) through the National Renewable Energy Laboratory (NREL), is to provide a comprehensive comparison of heavy-duty trucks operating on alternative fuels and diesel fuel. Data collection from up to eight sites is planned. Currently, the project has four sites: Raley's in Sacramento, CA (Kenworth, Cummins LlO-300G, liquefied natural gas - LNG); Pima Gro Systems, Inc. in Fontana, CA (White/GMC, Caterpillar 31768 Dual-Fuel, compressed natural gas - CNG); Waste Management in Washington, PA (Mack, Mack E7G, LNG); and United Parcel Service in Hartford, CT (Freightliner Custom Chassis, Cummins B5.9G, CNG). This paper summarizes current data collection and evaluation results from this project.

Kevin L. Chandler; Paul Norton; Nigel Clark



"Aegean Seals of the Late Bronze Age: Masters and Workshops, II. The First Generation Minoan Masters"  

E-Print Network [OSTI]

the popular Groups.2 The serpentine seals found armost excrusively in LM r 6..irr, .o.r,.** comprise the more naturalistic Cretan popular Gro.rf O....fr*, ,fr. Cp Group); the steatite seals.found m.osrry o.r th. M#il";,;.-.iio,r"tty in the Islands, and rarely...*p"r. the lions on IX 114 and,7D,.lor. ,o the J-L Masrer. Lions, Bulls, Stags, Boars: The Master. ].31j 11:al_{:_.1 Jap!9io and 272 (5, 6) from Rutsi (both LH ilA). Aegean seals: masters and workshops l2l animals (note the waterbirds' legs on I273). The careful...

Younger, John G.



Simulation of the shape of chaperonins using the small-angle x-ray scattering curves and torus form factor  

SciTech Connect (OSTI)

The inverse scattering problem has been solved for protein complexes whose surfaces can be described by a set of the simplest doubly connected surfaces in the uniform approximation (a scattering potential inside the molecule is a constant). Solutions of two proteins-well-known GroEL bacterial chaperonin and poor-studied bacteriophage chaperonin, which is a product of 146 gene (gp146)-were taken for the experiment. The shapes of protein complexes have been efficiently reconstructed from the experimental scattering curves. The shell method, the method of the rotation of amino acid sequences with the use of the form factor of an amino acid, and the method of seeking the model parameters of a protein complex with the preliminarily obtained form factor of the model have been used to reconstruct the shape of these particles.

Amarantov, S. V., E-mail: amarantov_s@mail.ru [Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation); Naletova, I. N. [Moscow State University, Belozerskii Institute of Molecular Biology and Bioorganic Chemistry (Russian Federation); Kurochkina, L. P. [Russian Academy of Sciences, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry (Russian Federation)



Progress with the real-time GRB coordinates distribution network (BACODINE)  

SciTech Connect (OSTI)

The RA, Dec coordinates of gamma-ray burst (GRB) sources observed with BATSE on GRO are automatically determined and distributed in real time to members of the global scientific community. These data are now being used by 27 operations to enable searches for associated transients in a variety of other wavelength or energy regimes to identify the burst source objects. The minimum total delay time from the onset of a GRB to the receipt of its coordinates by distant experimenters can be under 4 sec, less than the duration of a typical GRB, and the maximum total delay is 7 sec, or longer, depending on the distribution method. Recent improvements to the BACODINE system and some future improvements are discussed. A summary of the follow-up observations made by the BACODINE sites is given.

Barthelmy, S. D.; Butterworth, P. S.; Cline, T. L.; Gehrels, N.; Fishman, G. J.; Kouveliotou, C.; Meegan, C.; Hurley, K. [USRA NASA-GSFC, Code 661, Greenbelt, Maryland 20771 (United States); STX NASA-GSFC, Code 661, Greenbelt, Maryland 20771 (United States); NASA-GSFC, Code 661, Greenbelt, Maryland 20771 (United States); NASA-MSFC, Code ES-81, Huntsville, Alabama 35812 (United States); UC Berkeley SSL, Berkeley, California 94720 (United States)



Control of the Pyrimidine biosynthetic pathway in different strains of Salmonella typhimurium  

E-Print Network [OSTI]

(2 (S121) 22 20 1. 1 1. 1 ~ able B. 1 r'si n Wrlo iype Levels of 0 I Case aq c B pacific fctiv'ty Specific Rc ivity Fold 0 repress'on LT2 (51) 119 17H u, i a, u. . ~l) 112 BB S+rains sere oro. . n on minimal media '. . ) S+raina were gro... ioe 3, 2 192 3. 0 a) 5tz'a '. ns w re crown nn minimal media:upplement d wi. "5 uraci 1, 5) 5t-sins growth were grown on 10 ug per ml of uracil and calle were harvested after had -e-, 'ad fc- 00 min. were grown on 50 uo per ml n u~ a . il and c...

Smith, Johnny Melven



On the Misalignment of Jets in Microquasars  

E-Print Network [OSTI]

We discuss the timescales for alignment of black hole and accretion disc spins in the context of binary systems. We show that for black holes that are formed with substantial angular momentum, the alignment timescales are likely to be at least a substantial fraction of the systems' lifetimes. This result explains the observed misalignment of the disc and the jet in the microquasar GRO J 1655-40 and in SAX J 1819-2525 as being likely due to the Bardeen-Petterson effect. We discuss the implications of these results on the mass estimate for GRS 1915+105, which has assumed the jet is perpendicular to the orbital plane of the system and may hence be an underestimate. We show that the timescales for the spin alignment in Cygnus X-3 are consistent with the likely misalignment of disc and jet in that system, and that this is suggested by the observational data.

Thomas J. Maccarone



The Hall mobility measurement of Liquid Phase Epitaxy grown aluminum gallium arsenide  

E-Print Network [OSTI]

allows lasing action at or above room temperature. The utility of AI?Ga& ?As is based on the close latti&e match to GaAs over a range of Al mole fraction between zero and one(Fig. 1)IS). This is significant since heterojunctions between s...-type by occupying the site normally orc?pi& d by th& gro?p V element, ar?l acting as a donor. For the p-type of AI?Ga& ?As. %1g was used as an i&np?ri&y. Fig. 10 and Fig. 11 show I he r&'lal ionship bet wc?n th& in&p?r&I& & o???& r?t ?&n??&l t he alorr&i& weight...

Choi, Young-Shig



Towards 4U 1630-47: a black-hole soft X-ray transient odyssey  

E-Print Network [OSTI]

4U 1630-47 is a black-hole X-ray transient with one of the shortest recurrence times. Despite its regular outburst behaviour little is known about this source. Only recently has attention to this system increased. I discuss there the basic known (X-ray) properties of 4U 1630-47 and report on X-ray and radio observations obtained during its recent outburst, starting in 1998 February. These observations strengthen some of the similarities seen between 4U 1630-47 and the Galactic superluminal sources GRO J1655-40 and GRS 1915+105, and provide the first detection of 4U 1630-47 in the radio. Using an updated outburst ephemeris I predict the next outburst to occur about a week before Christmas 1999.

Erik Kuulkers



Global Analysis of Heat Shock Response in Desulfovibrio vulgaris Hildenborough.  

SciTech Connect (OSTI)

Desulfovibrio vulgaris Hildenborough belongs to a class ofsulfate-reducing bacteria (SRB) and is found ubiquitously in nature.Given the importance of SRB-mediated reduction for bioremediation ofmetal ion contaminants, ongoing research on D. vulgaris has been in thedirection of elucidating regulatory mechanisms for this organism under avariety of stress conditions. This work presents a global view of thisorganism's response to elevated growth temperature using whole-celltranscriptomics and proteomics tools. Transcriptional response (1.7-foldchange or greater; Z>1.5) ranged from 1,135 genes at 15 min to 1,463genes at 120 min for a temperature up-shift of 13oC from a growthtemperature of 37oC for this organism and suggested both direct andindirect modes of heat sensing. Clusters of orthologous group categoriesthat were significantly affected included posttranslationalmodifications; protein turnover and chaperones (up-regulated); energyproduction and conversion (down-regulated), nucleotide transport,metabolism (down-regulated), and translation; ribosomal structure; andbiogenesis (down-regulated). Analysis of the genome sequence revealed thepresence of features of both negative and positive regulation whichincluded the CIRCE element and promoter sequences corresponding to thealternate sigma factors ?32 and ?54. While mechanisms of heat shockcontrol for some genes appeared to coincide with those established forEscherichia coli and Bacillus subtilis, the presence of unique controlschemes for several other genes was also evident. Analysis of proteinexpression levels using differential in-gel electrophoresis suggestedgood agreement with transcriptional profiles of several heat shockproteins, including DnaK (DVU0811), HtpG (DVU2643), HtrA (DVU1468), andAhpC (DVU2247). The proteomics study also suggested the possibility ofposttranslational modifications in the chaperones DnaK, AhpC, GroES(DVU1977), and GroEL (DVU1976) and also several periplasmic ABCtransporters.

Chhabra, S.R.; He, Q.; Huang, K.H.; Gaucher, S.P.; Alm, E.J.; He,Z.; Hadi, M.Z.; Hazen, T.C.; Wall, J.D.; Zhou, J.; Arkin, A.P.; Singh, A.K.



Coal Direct Chemical Looping Retrofit to Pulverized Coal Power Plants for In-Situ CO2 Capture  

SciTech Connect (OSTI)

A novel Coal Direct Chemical Looping (CDCL) system is proposed to effectively capture CO2 from existing PC power plants. The work during the past three years has led to an oxygen carrier particle with satisfactory performance. Moreover, successful laboratory, bench scale, and integrated demonstrations have been performed. The proposed project further advanced the novel CDCL technology to sub-pilot scale (25 kWth). To be more specific, the following objectives attained in the proposed project are: 1. to further improve the oxygen carrying capacity as well as the sulfur/ash tolerance of the current (working) particle; 2. to demonstrate continuous CDCL operations in an integrated mode with > 99% coal (bituminous, subbituminous, and lignite) conversion as well as the production of high temperature exhaust gas stream that is suitable for steam generation in existing PC boilers; 3. to identify, via demonstrations, the fate of sulfur and NOx; 4. to conduct thorough techno-economic analysis that validates the technical and economical attractiveness of the CDCL system. The objectives outlined above were achieved through collaborative efforts among all the participants. CONSOL Energy Inc. performed the techno-economic analysis of the CDCL process. Shell/CRI was able to perform feasibility and economic studies on the large scale particle synthesis and provide composite particles for the sub-pilot scale testing. The experience of B&W (with boilers) and Air Products (with handling gases) assisted the retrofit system design as well as the demonstration unit operations. The experience gained from the sub-pilot scale demonstration of the Syngas Chemical Looping (SCL) process at OSU was able to ensure the successful handling of the solids. Phase 1 focused on studies to improve the current particle to better suit the CDCL operations. The optimum operating conditions for the reducer reactor such as the temperature, char gasification enhancer type, and flow rate were identified. The modifications of the existing bench scale reactor were completed in order to use it in the next phase of the project. In Phase II, the optimum looping medium was selected, and bench scale demonstrations were completed using them. Different types of coal char such as those obtained from bituminous, subbituminous, and lignite were tested. Modifications were made on the existing sub-pilot scale unit for coal injection. Phase III focused on integrated CDCL demonstration in the sub-pilot scale unit. A comprehensive ASPEN® simulations and economic analysis was completed by CONSOL t is expected that the CDCL process will be ready for further demonstrations in a scale up unit upon completion of the proposed project.

Zeng, Liang; Li, Fanxing; Kim, Ray; Bayham, Samuel; McGiveron, Omar; Tong, Andrew; Connell, Daniel; Luo, Siwei; Sridhar, Deepak; Wang, Fei; Sun, Zhenchao; Fan, Liang-Shih



Complex Hydride Compounds with Enhanced Hydrogen Storage Capacity  

SciTech Connect (OSTI)

The United Technologies Research Center (UTRC), in collaboration with major partners Albemarle Corporation (Albemarle) and the Savannah River National Laboratory (SRNL), conducted research to discover new hydride materials for the storage of hydrogen having on-board reversibility and a target gravimetric capacity of ? 7.5 weight percent (wt %). When integrated into a system with a reasonable efficiency of 60% (mass of hydride / total mass), this target material would produce a system gravimetric capacity of ? 4.5 wt %, consistent with the DOE 2007 target. The approach established for the project combined first principles modeling (FPM - UTRC) with multiple synthesis methods: Solid State Processing (SSP - UTRC), Solution Based Processing (SBP - Albemarle) and Molten State Processing (MSP - SRNL). In the search for novel compounds, each of these methods has advantages and disadvantages; by combining them, the potential for success was increased. During the project, UTRC refined its FPM framework which includes ground state (0 Kelvin) structural determinations, elevated temperature thermodynamic predictions and thermodynamic / phase diagram calculations. This modeling was used both to precede synthesis in a virtual search for new compounds and after initial synthesis to examine reaction details and options for modifications including co-reactant additions. The SSP synthesis method involved high energy ball milling which was simple, efficient for small batches and has proven effective for other storage material compositions. The SBP method produced very homogeneous chemical reactions, some of which cannot be performed via solid state routes, and would be the preferred approach for large scale production. The MSP technique is similar to the SSP method, but involves higher temperature and hydrogen pressure conditions to achieve greater species mobility. During the initial phases of the project, the focus was on higher order alanate complexes in the phase space between alkaline metal hydrides (AmH), Alkaline earth metal hydrides (AeH2), alane (AlH3), transition metal (Tm) hydrides (TmHz, where z=1-3) and molecular hydrogen (H2). The effort started first with variations of known alanates and subsequently extended the search to unknown compounds. In this stage, the FPM techniques were developed and validated on known alanate materials such as NaAlH4 and Na2LiAlH6. The coupled predictive methodologies were used to survey over 200 proposed phases in six quaternary spaces, formed from various combinations of Na, Li Mg and/or Ti with Al and H. A wide range of alanate compounds was examined using SSP having additions of Ti, Cr, Co, Ni and Fe. A number of compositions and reaction paths were identified having H weight fractions up to 5.6 wt %, but none meeting the 7.5 wt%H reversible goal. Similarly, MSP of alanates produced a number of interesting compounds and general conclusions regarding reaction behavior of mixtures during processing, but no alanate based candidates meeting the 7.5 wt% goal. A novel alanate, LiMg(AlH4)3, was synthesized using SBP that demonstrated a 7.0 wt% capacity with a desorption temperature of 150°C. The deuteride form was synthesized and characterized by the Institute for Energy (IFE) in Norway to determine its crystalline structure for related FPM studies. However, the reaction exhibited exothermicity and therefore was not reversible under acceptable hydrogen gas pressures for on-board recharging. After the extensive studies of alanates, the material class of emphasis was shifted to borohydrides. Through SBP, several ligand-stabilized Mg(BH4)2 complexes were synthesized. The Mg(BH4)2*2NH3 complex was found to change behavior with slightly different synthesis conditions and/or aging. One of the two mechanisms was an amine-borane (NH3BH3) like dissociation reaction which released up to 16 wt %H and more conservatively 9 wt%H when not including H2 released from the NH3. From FPM, the stability of the Mg(BH4)2*2NH3 compound was found to increase with the inclusion of NH3 groups in the inner-Mg coordination

Mosher, Daniel A.; Opalka, Susanne M.; Tang, Xia; Laube, Bruce L.; Brown, Ronald J.; Vanderspurt, Thomas H.; Arsenault, Sarah; Wu, Robert; Strickler, Jamie; Anton, Donald L.; Zidan, Ragaiy; Berseth, Polly



Multi-wavelength identification of high-energy sources  

E-Print Network [OSTI]

The nature of most of the ~300 high-energy gamma-ray sources discovered by the EGRET instrument aboard the Gamma-ray Observatory (GRO) between 1991 and 1999 is one of the greatest enigmas in high-energy astrophysics. While about half of the extragalactic sources have been optically identified with Active Galactic Nuclei (AGN), only a meagre 10% of the galactic sources have a reliable identification. This low success rate has mainly to be ascribed to the local crowding of potential optical counterparts and to the large gamma-ray error boxes (of the order of one degree in radius) which prevented a straightforward optical identification. Indeed, a multi-wavelength identification strategy, based on a systematic coverage of the gamma-ray error boxes, has been the only do-able approach. The situation is now greatly improving thanks to the observations performed by the Fermi Gamma-ray Space Telescope which, thanks to the LAT instrument, provides a factor of 50 improvement in sensitivity and a factor of 10 improvemen...

Mignani, R P


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A Model of the EGRET Source at the Galactic Center: Inverse Compton Scattering Within Sgr A East and its Halo  

E-Print Network [OSTI]

Continuum low-frequency radio observations of the Galactic Center reveal the presence of two prominent radio sources, Sgr A East and its surrounding Halo, containing non-thermal particle distributions with power-law indices around 2.5-3.3 and 2.4, respectively. The central 1-2 pc region is also a source of intense (stellar) UV and (dust-reprocessed) far-IR radiation that bathes these extended synchrotron-emitting structures. A recent detection of gamma-rays (2EGJ1746-2852) from within around 1 degree of the Galactic Center by EGRET onboard the Compton GRO shows that the emission from this environment extends to very high energies. We suggest that inverse Compton scatterings between the power-law electrons inferred from the radio properties of Sgr A East and its Halo, and the UV and IR photons from the nucleus, may account for the possibly diffuse gamma-ray source as well. We show that both particle distributions may be contributing to the gamma-ray emission, though their relevant strength depends on the actual physical properties (such as the magnetic field intensity) in each source. If this picture is correct, the high-energy source at the Galactic Center is extended over several arcminutes, which can be tested with thenext generation of gamma-ray and hard X-ray missions.

Fulvio Melia; Farhad Yusef-Zadeh; Marco Fatuzzo



Kinematic Density Waves in Accretion Disks  

E-Print Network [OSTI]

When thin accretion disks around black holes are perturbed, the main restoring force is gravity. If gas pressure, magnetic stresses, and radiation pressure are neglected, the disk remains thin as long as orbits do not intersect. Intersections would result in pressure forces which limit the growth of perturbations. We find that a discrete set of perturbations is possible for which orbits remain non-intersecting for arbitrarily long times. These modes define a discrete set of frequencies. We classify all long-lived perturbations for arbitrary potentials and show how their mode frequencies are related to pattern speeds computed from the azimuthal and epicyclic frequencies. We show that modes are concentrated near radii where the pattern speed has vanishing radial derivative. We explore these modes around Kerr black holes as a possible explanation for the high-frequency quasi-periodic oscillations of black hole binaries such as GRO J1655-40. The long-lived modes are shown to coincide with diskoseismic waves in the limit of small sound speed. While the waves have long lifetime, they have the wrong frequencies to explain the pairs of high-frequency quasi-periodic oscillations observed in black hole binaries.

Svetlin Tassev; Edmund Bertschinger



Earth occultation technique with EGRET calorimeter data above 1 MeV  

SciTech Connect (OSTI)

The technique of earth occultation has produced many exciting results from the BATSE data. We examine the possibility of using this technique on the Total Absorption Shower Calorimeter (TASC) of EGRET. The TASC has an effective area of a few 1000 cm{sup 2} and is 8 radiation lengths deep. Spectra from 1-200 MeV are collected every 33 sec and the rate at 4 energies is monitored every 2 sec. The detector is unshielded and uncollimated so the background is large. The statistical error on the background measurements require several days of exposure to detect the Crab at the lowest energies. Longer exposures would be needed due to systematic errors in determining the background. However, the wide field of view (the effective area is nearly 1000 cm{sup 2} even through the back of the spacecraft) could be used to monitor variability and confirm fluxes of sources such as the black hole candidates, Cyg X-1 and GRO J0422+33.

Dingus, Brenda L. [University of Utah, Salt Lake City, Utah 84112 (United States); Bertsch, D. L. [NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771 (United States); Schneid, E. J. [Northrop-Grumman, Bethpage, New York 11714 (United States)



X-RED: A Satellite Mission Concept To Detect Early Universe Gamma Ray Bursts  

E-Print Network [OSTI]

Gamma ray bursts (GRBs) are the most energetic eruptions known in the Universe. Instruments such as Compton-GRO/BATSE and the GRB monitor on BeppoSAX have detected more than 2700 GRBs and, although observational confirmation is still required, it is now generally accepted that many of these bursts are associated with the collapse of rapidly spinning massive stars to form black holes. Consequently, since first generation stars are expected to be very massive, GRBs are likely to have occurred in significant numbers at early epochs. X-red is a space mission concept designed to detect these extremely high redshifted GRBs, in order to probe the nature of the first generation of stars and hence the time of reionisation of the early Universe. We demonstrate that the gamma and x-ray luminosities of typical GRBs render them detectable up to extremely high redshifts (z~10-30), but that current missions such as HETE2 and SWIFT operate outside the observational range for detection of high redshift GRB afterglows. Therefo...

Krumpe, M; Cherix, M; Coffey, D; Deroo, P; Egger, G; Hasinger, G; Hoffmann, A I D; Lefever, K; Liermann, A; Lund, N; Parmar, A; Russo, P; Steiper, J; Strodl, T; Vilardell, F; Wahlin, R; Albrecht, Simon; Cherix, Marc; Coffey, Deirdre; Deroo, Pieter; Egger, Georg; Hasinger, Guenther; Hoffmann, Agnes I.D.; Krumpe, Mirko; Lefever, Karolien; Liermann, Adriane; Lund, Niels; Parmar, Arvind; Russo, Pedro; Steiper, Joerg; Strodl, Thomas; Vilardell, Francesc; Wahlin, Rurik



Study of luminosity and spin-up relation in X-ray binary pulsars with long-term monitoring by MAXI/GSC and Fermi/GBM  

E-Print Network [OSTI]

We study the relation between luminosity and spin-period change in X-ray binary pulsars using long-term light curve obtained by the MAXI/GSC all-sky survey and pulse period data from the Fermi/GBM pulsar project. X-ray binaries, consisting of a highly magnetized neutron star and a stellar companion, originate X-ray emission according to the energy of the accretion matter onto the neutron star. The accretion matter also transfers the angular momentum at the Alfven radius, and then spin up the neutron star. Therefore, the X-ray luminosity and the spin-up rate are supposed to be well correlated. We analyzed the luminosity and period-change relation using the data taken by continuous monitoring of MAXI/GSC and Fermi/GBM for Be/X-ray binaries, GX 304$-$1, A 0535$+$26, GRO J1008$-$57, KS 1947$+$300, and 2S 1417$-$624, which occurred large outbursts in the last four years. We discuss the results comparing the obtained observed relation with that of the theoretical model by Ghosh \\& Lamb (1979).

Sugizaki, Mutsumi; Nakajima, Motoki; Yamaoka, Kazutaka



X-ray bursts from the Terzan 5 transient IGR J17480-2446: nuclear rather than gravitational  

E-Print Network [OSTI]

The 2010 outburst of the transient neutron star low-mass X-ray binary IGR J17480-2446 has exhibited a series of unique X-ray bursts, as well as millihertz (mHz) quasi-periodic oscillations (QPOs) related to these bursts. It has been recently proposed that these are type-II bursts, powered by the gravitational energy. This implies that the current nuclear-burning based model of mHz QPOs is not correct, and this timing feature cannot be used as a tool to measure the neutron star parameters. We report the analysis of the Rossi X-ray Timing Explorer data of IGR J17480-2446 to show that the burst properties of this source are quite different from the properties of the type-II bursts observed from the rapid burster and GRO J1744-28. For example, the inferred ratio (~ 50-90) of the non-burst fluence to burst fluence is consistent with the thermonuclear origin of IGR J17480-2446 bursts, and is significantly different from this ratio (< 4) for type-II bursts. Our results suggest that the bursts and the mHz QPOs from IGR J17480-2446 are powered by the nuclear energy.

Manoneeta Chakraborty; Sudip Bhattacharyya



Technical Analysis of Installed Micro-Combined Heat and Power Fuel-Cell System  

SciTech Connect (OSTI)

Combined heat and power fuel cell systems (CHP-FCSs) provide consistent electrical power and hot water with greater efficiency and lower emissions than alternative sources. These systems can be used either as baseload, grid-connected, or as off-the-grid power sources. This report presents a technical analysis of 5 kWe CHP-FCSs installed in different locations in the U.S. At some sites as many as five 5 kWe system is used to provide up to 25kWe of power. Systems in this power range are considered “micro”-CHP-FCS. To better assess performance of micro-CHP-FCS and understand their benefits, the U.S. Department of Energy worked with ClearEdge Power to install fifteen 5-kWe PBI high temperature PEM fuel cells (CE5 models) in the commercial markets of California and Oregon. Pacific Northwest National Laboratory evaluated these systems in terms of their economics, operations, and technical performance. These units were monitored from September 2011 until June 2013. During this time, about 190,000 hours of data were collected and more than 17 billion data points were analyzed. Beginning in July 2013, ten of these systems were gradually replaced with ungraded systems (M5 models) containing phosphoric acid fuel cell technology. The new units were monitored until June 2014 until they went offline because ClearEdge was bought by Doosan at the time and the new manufacturer did not continue to support data collection and maintenance of these units. During these two phases, data was collected at once per second and data analysis techniques were applied to understand behavior of these systems. The results of this analysis indicate that systems installed in the second phase of this demonstration performed much better in terms of availability, consistency in generation, and reliability. The average net electrical power output increased from 4.1 to 4.9 kWe, net heat recovery from 4.7 to 5.4 kWth, and system availability improved from 94% to 95%. The average net system electric efficiency, average net heat recovery efficiency, and overall net efficiency of the system increased respectively from 33% to 36%, from 38% to 41%, and from 71% to 76%. The temperature of water sent to sit however reduced by about 16% from 51?C to 43 ?C. This was a control strategy and the temperature can be controlled depending on building heat demands. More importantly, the number of shutdowns and maintenance events required to keep the systems running at the manufacturer’s rated performance specifications were substantially reduced by about 76% (for 8 to 10 units running over a one-year period). From July 2012 to June 2013, there were eight CE5 units in operation and a total of 134 scheduled and unscheduled shutdowns took place. From July 2013 to June 2014, between two to ten units were in operation and only 32 shutdowns were reported (all unscheduled). In summary, the number of shutdowns reduced from 10 shutdowns per month on average for eight CE5units to an average of 2.7 shutdowns per month for M5 units (between two to ten units).

Brooks, Kriston P.; Makhmalbaf, Atefe



The Hard X-Ray to Gamma-ray Spectrum in the EGRET AGNs  

E-Print Network [OSTI]

EGRET (20 MeV to 30 GeV) on board the Compton GRO has observed high-energy emission from about 40-50 Active Galactic Nuclei. Theoretical models of this emission based on the upscattering of thermal disk photons by cooling, relativistic electrons can successfully account for the EGRET observations, but they predict a considerably greater X-ray flux than that actually observed in a majority of these sources. This inconsistency may be an indication that the particles are energized during the Compton scattering process, since the X-ray emission is produced by the lowest energy electrons, whose density may be relatively small due to the acceleration. Such a situation may arise as a result of resistive field generation in electromagnetic acceleration schemes, which we here explore. A key feature of this model is the assumed existence of a current associated with the azimuthal component B_phi of the underlying magnetic field by a slight imbalance in the energy distributions of outwardly moving, relativistic electrons and protons produced at the disk surface via shock acceleration. The generation of an electric field (via magnetic field line reconnection) is thus required to maintain the current in the presence of a resistivity induced by the radiative drag on the relativistic electrons. We show that the resulting spectrum can exhibit a significant deficit of X-rays compared with gamma-rays. In addition, due to the uni-directional flow of the current associated with B_phi, this model would predict that the electrons are energized relative to the protons in the outflow only on one side of the disk. They should be decelerated on the reverse side. As such, we would anticipate that any given blazar should have a ~50% probability of being gamma-bright, which appears to be consistent with the observed ratio.

Marco Fatuzzo; Fulvio Melia



Corrective Action Investigation Plan for Corrective Action Unit 214: Bunkers and Storage Areas Nevada Test Site, Nevada: Revision 0, Including Record of Technical Change No. 1 and No. 2  

SciTech Connect (OSTI)

This Corrective Action Investigation Plan contains the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office's approach to collect the data necessary to evaluate corrective action alternatives appropriate for the closure of Corrective Action Unit (CAU) 214 under the Federal Facility Agreement and Consent Order. Located in Areas 5, 11, and 25 of the Nevada Test Site, CAU 214 consists of nine Corrective Action Sites (CASs): 05-99-01, Fallout Shelters; 11-22-03, Drum; 25-99-12, Fly Ash Storage; 25-23-01, Contaminated Materials; 25-23-19, Radioactive Material Storage; 25-99-18, Storage Area; 25-34-03, Motor Dr/Gr Assembly (Bunker); 25-34-04, Motor Dr/Gr Assembly (Bunker); and 25-34-05, Motor Dr/Gr Assembly (Bunker). These sites are being investigated because existing information on the nature and extent of potential contamination is insufficient to evaluate and recommend corrective action alternatives (CAAs). The suspected contaminants and critical analyte s for CAU 214 include oil (total petroleum hydrocarbons-diesel-range organics [TPH-DRO], polychlorinated biphenyls [PCBs]), pesticides (chlordane, heptachlor, 4,4-DDT), barium, cadmium, chronium, lubricants (TPH-DRO, TPH-gasoline-range organics [GRO]), and fly ash (arsenic). The land-use zones where CAU 214 CASs are located dictate that future land uses will be limited to nonresidential (i.e., industrial) activities. The results of this field investigation will support a defensible evaluation of viable corrective action alternatives that will be presented in the corrective action decision document.

U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office



GRBs and Hypernova Explosions of Some Galactic Sources  

E-Print Network [OSTI]

Knowing the Kerr parameters we can make quantitative calculations of the rotational energy of black holes. We show that Nova Sco (GRO J1655 - 40), Il Lupi (4U 1543 - 47), XTE J1550 - 564 and GS 2023 + 338 are relics of gamma-ray burst (GRB) and Hypernova explosions. They had more than enough rotational energy to power themselves. In fact, they had so much energy that they would have disrupted the accretion disk of the black hole that powered them by the communicated rotational energy, so that the energy delivery was self limiting. The most important feature in producing high rotational energy in the binary is low donor (secondary star) mass. We suggest that V4641 Sgr (XTE J1819 - 254) and GRS 1915 + 105 underwent less energetic explosions; because of their large donor masses. These explosions were one or two orders of magnitude lower in energy than that of Nova Sco. Cyg X - 1 (1956 + 350) had an even less energetic explosion, because of an even larger donor mass. We find that in the evolution of the soft X-ray transient sources the donor (secondary star) is tidally locked with the helium star, which evolved from the giant, as the hydrogen envelope is stripped off in common envelope evolution. The tidal locking is transferred from the helium star to the black hole into which it falls. Depending on the mass of the donor, the black hole can be spun up to the angular momentum necessary to power the GRB and Hypernova explosion. The donor decouples, acting as a passive witness to the explosion which, for the given angular momentum, then proceeds as in the Woosley Collapsar model. High mass donors which tend to follow from low metallicity give long GRBs because their lower energy can be accepted by the central engine.

G. E. Brown; C. -H. Lee; E. Moreno Mendez



X-RED: A Satellite Mission Concept To Detect Early Universe Gamma Ray Bursts  

E-Print Network [OSTI]

Gamma ray bursts (GRBs) are the most energetic eruptions known in the Universe. Instruments such as Compton-GRO/BATSE and the GRB monitor on BeppoSAX have detected more than 2700 GRBs and, although observational confirmation is still required, it is now generally accepted that many of these bursts are associated with the collapse of rapidly spinning massive stars to form black holes. Consequently, since first generation stars are expected to be very massive, GRBs are likely to have occurred in significant numbers at early epochs. X-red is a space mission concept designed to detect these extremely high redshifted GRBs, in order to probe the nature of the first generation of stars and hence the time of reionisation of the early Universe. We demonstrate that the gamma and x-ray luminosities of typical GRBs render them detectable up to extremely high redshifts (z~10-30), but that current missions such as HETE2 and SWIFT operate outside the observational range for detection of high redshift GRB afterglows. Therefore, to redress this, we present a complete mission design from the science case to the mission architecture and payload, the latter comprising three instruments, namely wide field x-ray cameras to detect high redshift gamma-rays, an x-ray focussing telescope to determine accurate coordinates and extract spectra, and an infrared spectrograph to observe the high redshift optical afterglow. The mission is expected to detect and identify for the first time GRBs with z > 10, thereby providing constraints on properties of the first generation of stars and the history of the early Universe.

Mirko Krumpe; Deirdre Coffey; Georg Egger; Francesc Vilardell; Karolien Lefever; Adriane Liermann; Agnes I. D. Hoffmann; Joerg Steiper; Marc Cherix; Simon Albrecht; Pedro Russo; Thomas Strodl; Rurik Wahlin; Pieter Deroo; Arvind Parmar; Niels Lund; Guenther Hasinger



Efficient and Specific Trypsin Digestion of Microgram to Nanogram Quantities of Proteins in Organic-Aqueous Solvent Systems  

SciTech Connect (OSTI)

Mass spectrometry-based identification of the components of multiprotein complexes often involves solution-phase proteolytic digestion of the complex. The affinity purification of individual protein complexes often yields nanogram to low-microgram amounts of protein, which poses several challenges for enzymatic digestion and protein identification. We tested different solvent systems to optimize trypsin digestions of samples containing limited amounts of protein for subsequent analysis by LC-MS-MS. Data collected from digestion of 10-, 2-, 1-, and 0.2- g portions of a protein standard mixture indicated that an organicaqueous solvent system containing 80% acetonitrile consistently provided the most complete digestion, producing more peptide identifications than the other solvent systems tested. For example, a 1-h digestion in 80% acetonitrile yielded over 52% more peptides than the overnight digestion of 1 g of a protein mixture in purely aqueous buffer. This trend was also observed for peptides from digested ribosomal proteins isolated from Rhodopseudomonas palustris. In addition to improved digestion efficiency, the shorter digestion times possible with the organic solvent also improved trypsin specificity, resulting in smaller numbers of semitryptic peptides than an overnight digestion protocol using an aqueous solvent. The technique was also demonstrated for an affinityisolated protein complex, GroEL. To our knowledge, this report is the first using mass spectrometry data to show a linkage between digestion solvent and trypsin specificity. Mass spectrometry (MS) has become a widely used method for studying proteins, protein complexes, and whole proteomes because of innovations in soft ionization techniques, bioinformatics, and chromatographic separation techniques.1-7 An example of a high-throughput mass spectrometry strategy commonly used for this purpose is a variation of the "shotgun" approach, involving in-solution digestion of a protein complex followed by onedimensional (1D) or two-dimensional (2D) liquid chromatography (LC) coupled with electrospray ionization (ESI) MS-MS.6-8 One of the applications of this method is for characterizing multiprotein complexes by identifying large numbers of proteins in a single data acquisition.9 Large-scale implementations of this strategy have been reported for yeast and Escherichia coli.10-12 To achieve a goal of characterizing large numbers of protein complexes13 isolated by affinity purification from Rhodopseudomonas palustris,14 an efficient protocol for digesting these complexes is required.

Strader, Michael B [ORNL; Tabb, Dave L [ORNL; Hervey, IV, William Judson [ORNL; Pan, Chongle [ORNL; Hurst, Gregory {Greg} B [ORNL



Key residues for the oligomerization of A{beta}42 protein in Alzheimer's disease  

SciTech Connect (OSTI)

Highlights: Black-Right-Pointing-Pointer A{beta} oligomers are neurotoxins and likely the causing agents for Alzheimer's disease. Black-Right-Pointing-Pointer A{beta}42 fusion protein form globular oligomers. Black-Right-Pointing-Pointer A{beta}42 fusion protein oligomers contain SDS-resistant tetramers and hexamers. Black-Right-Pointing-Pointer Cysteine substitutions at residues 31, 32, 34, 39-41 disrupt A{beta}42 oligomerization. -- Abstract: Deposition of amyloid fibrils consisting of amyloid {beta} (A{beta}) protein as senile plaques in the brain is a pathological hallmark of Alzheimer's disease. However, a growing body of evidence shows that soluble A{beta} oligomers correlate better with dementia than fibrils, suggesting that A{beta} oligomers may be the primary toxic species. The structure and oligomerization mechanism of these A{beta} oligomers are crucial for developing effective therapeutics. Here we investigated the oligomerization of A{beta}42 in the context of a fusion protein containing GroES and ubiquitin fused to the N-terminus of A{beta} sequence. The presence of fusion protein partners, in combination with a denaturing buffer containing 8 M urea at pH 10, is unfavorable for A{beta}42 aggregation, thus allowing only the most stable structures to be observed. Transmission electron microscopy showed that A{beta}42 fusion protein formed globular oligomers, which bound weakly to thioflavin T and Congo red. SDS-PAGE shows that A{beta}42 fusion protein formed SDS-resistant hexamers and tetramers. In contrast, A{beta}40 fusion protein remained as monomers on SDS gel, suggesting that the oligomerization of A{beta}42 fusion protein is not due to the fusion protein partners. Cysteine scanning mutagenesis at 22 residue positions further revealed that single cysteine substitutions of the C-terminal hydrophobic residues (I31, I32, L34, V39, V40, and I41) led to disruption of hexamer and tetramer formation, suggesting that hydrophobic interactions between these residues are most critical for A{beta}42 oligomerization.

Ngo, Sam [Department of Neurology, Brain Research Institute, Molecular Biology Institute, University of California, Los Angeles, CA 90095 (United States)] [Department of Neurology, Brain Research Institute, Molecular Biology Institute, University of California, Los Angeles, CA 90095 (United States); Guo, Zhefeng, E-mail: zhefeng@ucla.edu [Department of Neurology, Brain Research Institute, Molecular Biology Institute, University of California, Los Angeles, CA 90095 (United States)] [Department of Neurology, Brain Research Institute, Molecular Biology Institute, University of California, Los Angeles, CA 90095 (United States)